| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Thomas Falcon | 14789 | 48.72% | 114 | 32.95% |
| Nathan Fontenot | 5318 | 17.52% | 43 | 12.43% |
| Sukadev Bhattiprolu | 2968 | 9.78% | 47 | 13.58% |
| John Allen | 1805 | 5.95% | 25 | 7.23% |
| Lijun Pan | 1581 | 5.21% | 39 | 11.27% |
| Nick Child | 1084 | 3.57% | 4 | 1.16% |
| Desnes Augusto Nunes do Rosario | 636 | 2.10% | 4 | 1.16% |
| Cristobal Forno | 535 | 1.76% | 2 | 0.58% |
| Murilo Fossa Vicentini | 480 | 1.58% | 5 | 1.45% |
| Juliet Kim | 401 | 1.32% | 6 | 1.73% |
| Dany Madden | 330 | 1.09% | 11 | 3.18% |
| Dwip N. Banerjee | 107 | 0.35% | 5 | 1.45% |
| Cédric Le Goater | 89 | 0.29% | 1 | 0.29% |
| Mingming Cao | 38 | 0.13% | 1 | 0.29% |
| Thomas Gleixner | 31 | 0.10% | 2 | 0.58% |
| Philippe Reynes | 21 | 0.07% | 1 | 0.29% |
| Mick Tarsel | 14 | 0.05% | 1 | 0.29% |
| Michal Suchanek | 13 | 0.04% | 3 | 0.87% |
| Allen Pais | 12 | 0.04% | 1 | 0.29% |
| Florian Fainelli | 10 | 0.03% | 1 | 0.29% |
| Hao Chen | 10 | 0.03% | 1 | 0.29% |
| Brian King | 9 | 0.03% | 2 | 0.58% |
| Heiko J Schick | 8 | 0.03% | 1 | 0.29% |
| Jiri Wiesner | 8 | 0.03% | 1 | 0.29% |
| Jakub Kiciński | 7 | 0.02% | 3 | 0.87% |
| Rick Lindsley | 6 | 0.02% | 1 | 0.29% |
| Eric Dumazet | 6 | 0.02% | 2 | 0.58% |
| Michał Mirosław | 5 | 0.02% | 1 | 0.29% |
| Michael S. Tsirkin | 4 | 0.01% | 1 | 0.29% |
| Kees Cook | 4 | 0.01% | 2 | 0.58% |
| Wang Hai | 4 | 0.01% | 1 | 0.29% |
| Lee Jones | 3 | 0.01% | 1 | 0.29% |
| Christophe Leroy | 3 | 0.01% | 1 | 0.29% |
| Michael Ellerman | 2 | 0.01% | 1 | 0.29% |
| Jonathan Lemon | 2 | 0.01% | 1 | 0.29% |
| Junlin Yang | 2 | 0.01% | 1 | 0.29% |
| Ian Munsie | 2 | 0.01% | 1 | 0.29% |
| Joe Perches | 1 | 0.00% | 1 | 0.29% |
| Uwe Kleine-König | 1 | 0.00% | 1 | 0.29% |
| Jarod Wilson | 1 | 0.00% | 1 | 0.29% |
| Dan Carpenter | 1 | 0.00% | 1 | 0.29% |
| Arvind Yadav | 1 | 0.00% | 1 | 0.29% |
| Christophe Jaillet | 1 | 0.00% | 1 | 0.29% |
| Wei Yongjun | 1 | 0.00% | 1 | 0.29% |
| Li Yang | 1 | 0.00% | 1 | 0.29% |
| Total | 30355 | 346 |
// SPDX-License-Identifier: GPL-2.0-or-later /**************************************************************************/ /* */ /* IBM System i and System p Virtual NIC Device Driver */ /* Copyright (C) 2014 IBM Corp. */ /* Santiago Leon (santi_leon@yahoo.com) */ /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ /* John Allen (jallen@linux.vnet.ibm.com) */ /* */ /* */ /* This module contains the implementation of a virtual ethernet device */ /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ /* option of the RS/6000 Platform Architecture to interface with virtual */ /* ethernet NICs that are presented to the partition by the hypervisor. */ /* */ /* Messages are passed between the VNIC driver and the VNIC server using */ /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ /* issue and receive commands that initiate communication with the server */ /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ /* are used by the driver to notify the server that a packet is */ /* ready for transmission or that a buffer has been added to receive a */ /* packet. Subsequently, sCRQs are used by the server to notify the */ /* driver that a packet transmission has been completed or that a packet */ /* has been received and placed in a waiting buffer. */ /* */ /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ /* which skbs are DMA mapped and immediately unmapped when the transmit */ /* or receive has been completed, the VNIC driver is required to use */ /* "long term mapping". This entails that large, continuous DMA mapped */ /* buffers are allocated on driver initialization and these buffers are */ /* then continuously reused to pass skbs to and from the VNIC server. */ /* */ /**************************************************************************/ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/types.h> #include <linux/errno.h> #include <linux/completion.h> #include <linux/ioport.h> #include <linux/dma-mapping.h> #include <linux/kernel.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/skbuff.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/mm.h> #include <linux/ethtool.h> #include <linux/proc_fs.h> #include <linux/if_arp.h> #include <linux/in.h> #include <linux/ip.h> #include <linux/ipv6.h> #include <linux/irq.h> #include <linux/irqdomain.h> #include <linux/kthread.h> #include <linux/seq_file.h> #include <linux/interrupt.h> #include <net/net_namespace.h> #include <asm/hvcall.h> #include <linux/atomic.h> #include <asm/vio.h> #include <asm/xive.h> #include <asm/iommu.h> #include <linux/uaccess.h> #include <asm/firmware.h> #include <linux/workqueue.h> #include <linux/if_vlan.h> #include <linux/utsname.h> #include <linux/cpu.h> #include "ibmvnic.h" static const char ibmvnic_driver_name[] = "ibmvnic"; static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; MODULE_AUTHOR("Santiago Leon"); MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(IBMVNIC_DRIVER_VERSION); static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; static void release_sub_crqs(struct ibmvnic_adapter *, bool); static int ibmvnic_reset_crq(struct ibmvnic_adapter *); static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); static int enable_scrq_irq(struct ibmvnic_adapter *, struct ibmvnic_sub_crq_queue *); static int disable_scrq_irq(struct ibmvnic_adapter *, struct ibmvnic_sub_crq_queue *); static int pending_scrq(struct ibmvnic_adapter *, struct ibmvnic_sub_crq_queue *); static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, struct ibmvnic_sub_crq_queue *); static int ibmvnic_poll(struct napi_struct *napi, int data); static void send_query_map(struct ibmvnic_adapter *adapter); static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, u32, u8); static int send_request_unmap(struct ibmvnic_adapter *, u8); static int send_login(struct ibmvnic_adapter *adapter); static void send_query_cap(struct ibmvnic_adapter *adapter); static int init_sub_crqs(struct ibmvnic_adapter *); static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); static void release_crq_queue(struct ibmvnic_adapter *); static int __ibmvnic_set_mac(struct net_device *, u8 *); static int init_crq_queue(struct ibmvnic_adapter *adapter); static int send_query_phys_parms(struct ibmvnic_adapter *adapter); static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, struct ibmvnic_sub_crq_queue *tx_scrq); static void free_long_term_buff(struct ibmvnic_adapter *adapter, struct ibmvnic_long_term_buff *ltb); static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter); struct ibmvnic_stat { char name[ETH_GSTRING_LEN]; int offset; }; #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ offsetof(struct ibmvnic_statistics, stat)) #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off)))) static const struct ibmvnic_stat ibmvnic_stats[] = { {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, }; static int send_crq_init_complete(struct ibmvnic_adapter *adapter) { union ibmvnic_crq crq; memset(&crq, 0, sizeof(crq)); crq.generic.first = IBMVNIC_CRQ_INIT_CMD; crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; return ibmvnic_send_crq(adapter, &crq); } static int send_version_xchg(struct ibmvnic_adapter *adapter) { union ibmvnic_crq crq; memset(&crq, 0, sizeof(crq)); crq.version_exchange.first = IBMVNIC_CRQ_CMD; crq.version_exchange.cmd = VERSION_EXCHANGE; crq.version_exchange.version = cpu_to_be16(ibmvnic_version); return ibmvnic_send_crq(adapter, &crq); } static void ibmvnic_clean_queue_affinity(struct ibmvnic_adapter *adapter, struct ibmvnic_sub_crq_queue *queue) { if (!(queue && queue->irq)) return; cpumask_clear(queue->affinity_mask); if (irq_set_affinity_and_hint(queue->irq, NULL)) netdev_warn(adapter->netdev, "%s: Clear affinity failed, queue addr = %p, IRQ = %d\n", __func__, queue, queue->irq); } static void ibmvnic_clean_affinity(struct ibmvnic_adapter *adapter) { struct ibmvnic_sub_crq_queue **rxqs; struct ibmvnic_sub_crq_queue **txqs; int num_rxqs, num_txqs; int rc, i; rc = 0; rxqs = adapter->rx_scrq; txqs = adapter->tx_scrq; num_txqs = adapter->num_active_tx_scrqs; num_rxqs = adapter->num_active_rx_scrqs; netdev_dbg(adapter->netdev, "%s: Cleaning irq affinity hints", __func__); if (txqs) { for (i = 0; i < num_txqs; i++) ibmvnic_clean_queue_affinity(adapter, txqs[i]); } if (rxqs) { for (i = 0; i < num_rxqs; i++) ibmvnic_clean_queue_affinity(adapter, rxqs[i]); } } static int ibmvnic_set_queue_affinity(struct ibmvnic_sub_crq_queue *queue, unsigned int *cpu, int *stragglers, int stride) { cpumask_var_t mask; int i; int rc = 0; if (!(queue && queue->irq)) return rc; /* cpumask_var_t is either a pointer or array, allocation works here */ if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) return -ENOMEM; /* while we have extra cpu give one extra to this irq */ if (*stragglers) { stride++; (*stragglers)--; } /* atomic write is safer than writing bit by bit directly */ for (i = 0; i < stride; i++) { cpumask_set_cpu(*cpu, mask); *cpu = cpumask_next_wrap(*cpu, cpu_online_mask, nr_cpu_ids, false); } /* set queue affinity mask */ cpumask_copy(queue->affinity_mask, mask); rc = irq_set_affinity_and_hint(queue->irq, queue->affinity_mask); free_cpumask_var(mask); return rc; } /* assumes cpu read lock is held */ static void ibmvnic_set_affinity(struct ibmvnic_adapter *adapter) { struct ibmvnic_sub_crq_queue **rxqs = adapter->rx_scrq; struct ibmvnic_sub_crq_queue **txqs = adapter->tx_scrq; struct ibmvnic_sub_crq_queue *queue; int num_rxqs = adapter->num_active_rx_scrqs; int num_txqs = adapter->num_active_tx_scrqs; int total_queues, stride, stragglers, i; unsigned int num_cpu, cpu; int rc = 0; netdev_dbg(adapter->netdev, "%s: Setting irq affinity hints", __func__); if (!(adapter->rx_scrq && adapter->tx_scrq)) { netdev_warn(adapter->netdev, "%s: Set affinity failed, queues not allocated\n", __func__); return; } total_queues = num_rxqs + num_txqs; num_cpu = num_online_cpus(); /* number of cpu's assigned per irq */ stride = max_t(int, num_cpu / total_queues, 1); /* number of leftover cpu's */ stragglers = num_cpu >= total_queues ? num_cpu % total_queues : 0; /* next available cpu to assign irq to */ cpu = cpumask_next(-1, cpu_online_mask); for (i = 0; i < num_txqs; i++) { queue = txqs[i]; rc = ibmvnic_set_queue_affinity(queue, &cpu, &stragglers, stride); if (rc) goto out; if (!queue) continue; rc = __netif_set_xps_queue(adapter->netdev, cpumask_bits(queue->affinity_mask), i, XPS_CPUS); if (rc) netdev_warn(adapter->netdev, "%s: Set XPS on queue %d failed, rc = %d.\n", __func__, i, rc); } for (i = 0; i < num_rxqs; i++) { queue = rxqs[i]; rc = ibmvnic_set_queue_affinity(queue, &cpu, &stragglers, stride); if (rc) goto out; } out: if (rc) { netdev_warn(adapter->netdev, "%s: Set affinity failed, queue addr = %p, IRQ = %d, rc = %d.\n", __func__, queue, queue->irq, rc); ibmvnic_clean_affinity(adapter); } } static int ibmvnic_cpu_online(unsigned int cpu, struct hlist_node *node) { struct ibmvnic_adapter *adapter; adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node); ibmvnic_set_affinity(adapter); return 0; } static int ibmvnic_cpu_dead(unsigned int cpu, struct hlist_node *node) { struct ibmvnic_adapter *adapter; adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node_dead); ibmvnic_set_affinity(adapter); return 0; } static int ibmvnic_cpu_down_prep(unsigned int cpu, struct hlist_node *node) { struct ibmvnic_adapter *adapter; adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node); ibmvnic_clean_affinity(adapter); return 0; } static enum cpuhp_state ibmvnic_online; static int ibmvnic_cpu_notif_add(struct ibmvnic_adapter *adapter) { int ret; ret = cpuhp_state_add_instance_nocalls(ibmvnic_online, &adapter->node); if (ret) return ret; ret = cpuhp_state_add_instance_nocalls(CPUHP_IBMVNIC_DEAD, &adapter->node_dead); if (!ret) return ret; cpuhp_state_remove_instance_nocalls(ibmvnic_online, &adapter->node); return ret; } static void ibmvnic_cpu_notif_remove(struct ibmvnic_adapter *adapter) { cpuhp_state_remove_instance_nocalls(ibmvnic_online, &adapter->node); cpuhp_state_remove_instance_nocalls(CPUHP_IBMVNIC_DEAD, &adapter->node_dead); } static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, unsigned long length, unsigned long *number, unsigned long *irq) { unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; long rc; rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); *number = retbuf[0]; *irq = retbuf[1]; return rc; } /** * ibmvnic_wait_for_completion - Check device state and wait for completion * @adapter: private device data * @comp_done: completion structure to wait for * @timeout: time to wait in milliseconds * * Wait for a completion signal or until the timeout limit is reached * while checking that the device is still active. */ static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, struct completion *comp_done, unsigned long timeout) { struct net_device *netdev; unsigned long div_timeout; u8 retry; netdev = adapter->netdev; retry = 5; div_timeout = msecs_to_jiffies(timeout / retry); while (true) { if (!adapter->crq.active) { netdev_err(netdev, "Device down!\n"); return -ENODEV; } if (!retry--) break; if (wait_for_completion_timeout(comp_done, div_timeout)) return 0; } netdev_err(netdev, "Operation timed out.\n"); return -ETIMEDOUT; } /** * reuse_ltb() - Check if a long term buffer can be reused * @ltb: The long term buffer to be checked * @size: The size of the long term buffer. * * An LTB can be reused unless its size has changed. * * Return: Return true if the LTB can be reused, false otherwise. */ static bool reuse_ltb(struct ibmvnic_long_term_buff *ltb, int size) { return (ltb->buff && ltb->size == size); } /** * alloc_long_term_buff() - Allocate a long term buffer (LTB) * * @adapter: ibmvnic adapter associated to the LTB * @ltb: container object for the LTB * @size: size of the LTB * * Allocate an LTB of the specified size and notify VIOS. * * If the given @ltb already has the correct size, reuse it. Otherwise if * its non-NULL, free it. Then allocate a new one of the correct size. * Notify the VIOS either way since we may now be working with a new VIOS. * * Allocating larger chunks of memory during resets, specially LPM or under * low memory situations can cause resets to fail/timeout and for LPAR to * lose connectivity. So hold onto the LTB even if we fail to communicate * with the VIOS and reuse it on next open. Free LTB when adapter is closed. * * Return: 0 if we were able to allocate the LTB and notify the VIOS and * a negative value otherwise. */ static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, struct ibmvnic_long_term_buff *ltb, int size) { struct device *dev = &adapter->vdev->dev; u64 prev = 0; int rc; if (!reuse_ltb(ltb, size)) { dev_dbg(dev, "LTB size changed from 0x%llx to 0x%x, reallocating\n", ltb->size, size); prev = ltb->size; free_long_term_buff(adapter, ltb); } if (ltb->buff) { dev_dbg(dev, "Reusing LTB [map %d, size 0x%llx]\n", ltb->map_id, ltb->size); } else { ltb->buff = dma_alloc_coherent(dev, size, <b->addr, GFP_KERNEL); if (!ltb->buff) { dev_err(dev, "Couldn't alloc long term buffer\n"); return -ENOMEM; } ltb->size = size; ltb->map_id = find_first_zero_bit(adapter->map_ids, MAX_MAP_ID); bitmap_set(adapter->map_ids, ltb->map_id, 1); dev_dbg(dev, "Allocated new LTB [map %d, size 0x%llx was 0x%llx]\n", ltb->map_id, ltb->size, prev); } /* Ensure ltb is zeroed - specially when reusing it. */ memset(ltb->buff, 0, ltb->size); mutex_lock(&adapter->fw_lock); adapter->fw_done_rc = 0; reinit_completion(&adapter->fw_done); rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); if (rc) { dev_err(dev, "send_request_map failed, rc = %d\n", rc); goto out; } rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); if (rc) { dev_err(dev, "LTB map request aborted or timed out, rc = %d\n", rc); goto out; } if (adapter->fw_done_rc) { dev_err(dev, "Couldn't map LTB, rc = %d\n", adapter->fw_done_rc); rc = -EIO; goto out; } rc = 0; out: /* don't free LTB on communication error - see function header */ mutex_unlock(&adapter->fw_lock); return rc; } static void free_long_term_buff(struct ibmvnic_adapter *adapter, struct ibmvnic_long_term_buff *ltb) { struct device *dev = &adapter->vdev->dev; if (!ltb->buff) return; /* VIOS automatically unmaps the long term buffer at remote * end for the following resets: * FAILOVER, MOBILITY, TIMEOUT. */ if (adapter->reset_reason != VNIC_RESET_FAILOVER && adapter->reset_reason != VNIC_RESET_MOBILITY && adapter->reset_reason != VNIC_RESET_TIMEOUT) send_request_unmap(adapter, ltb->map_id); dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); ltb->buff = NULL; /* mark this map_id free */ bitmap_clear(adapter->map_ids, ltb->map_id, 1); ltb->map_id = 0; } /** * free_ltb_set - free the given set of long term buffers (LTBS) * @adapter: The ibmvnic adapter containing this ltb set * @ltb_set: The ltb_set to be freed * * Free the set of LTBs in the given set. */ static void free_ltb_set(struct ibmvnic_adapter *adapter, struct ibmvnic_ltb_set *ltb_set) { int i; for (i = 0; i < ltb_set->num_ltbs; i++) free_long_term_buff(adapter, <b_set->ltbs[i]); kfree(ltb_set->ltbs); ltb_set->ltbs = NULL; ltb_set->num_ltbs = 0; } /** * alloc_ltb_set() - Allocate a set of long term buffers (LTBs) * * @adapter: ibmvnic adapter associated to the LTB * @ltb_set: container object for the set of LTBs * @num_buffs: Number of buffers in the LTB * @buff_size: Size of each buffer in the LTB * * Allocate a set of LTBs to accommodate @num_buffs buffers of @buff_size * each. We currently cap size each LTB to IBMVNIC_ONE_LTB_SIZE. If the * new set of LTBs have fewer LTBs than the old set, free the excess LTBs. * If new set needs more than in old set, allocate the remaining ones. * Try and reuse as many LTBs as possible and avoid reallocation. * * Any changes to this allocation strategy must be reflected in * map_rxpool_buff_to_ltb() and map_txpool_buff_to_ltb(). */ static int alloc_ltb_set(struct ibmvnic_adapter *adapter, struct ibmvnic_ltb_set *ltb_set, int num_buffs, int buff_size) { struct device *dev = &adapter->vdev->dev; struct ibmvnic_ltb_set old_set; struct ibmvnic_ltb_set new_set; int rem_size; int tot_size; /* size of all ltbs */ int ltb_size; /* size of one ltb */ int nltbs; int rc; int n; int i; dev_dbg(dev, "%s() num_buffs %d, buff_size %d\n", __func__, num_buffs, buff_size); ltb_size = rounddown(IBMVNIC_ONE_LTB_SIZE, buff_size); tot_size = num_buffs * buff_size; if (ltb_size > tot_size) ltb_size = tot_size; nltbs = tot_size / ltb_size; if (tot_size % ltb_size) nltbs++; old_set = *ltb_set; if (old_set.num_ltbs == nltbs) { new_set = old_set; } else { int tmp = nltbs * sizeof(struct ibmvnic_long_term_buff); new_set.ltbs = kzalloc(tmp, GFP_KERNEL); if (!new_set.ltbs) return -ENOMEM; new_set.num_ltbs = nltbs; /* Free any excess ltbs in old set */ for (i = new_set.num_ltbs; i < old_set.num_ltbs; i++) free_long_term_buff(adapter, &old_set.ltbs[i]); /* Copy remaining ltbs to new set. All LTBs except the * last one are of the same size. alloc_long_term_buff() * will realloc if the size changes. */ n = min(old_set.num_ltbs, new_set.num_ltbs); for (i = 0; i < n; i++) new_set.ltbs[i] = old_set.ltbs[i]; /* Any additional ltbs in new set will have NULL ltbs for * now and will be allocated in alloc_long_term_buff(). */ /* We no longer need the old_set so free it. Note that we * may have reused some ltbs from old set and freed excess * ltbs above. So we only need to free the container now * not the LTBs themselves. (i.e. dont free_ltb_set()!) */ kfree(old_set.ltbs); old_set.ltbs = NULL; old_set.num_ltbs = 0; /* Install the new set. If allocations fail below, we will * retry later and know what size LTBs we need. */ *ltb_set = new_set; } i = 0; rem_size = tot_size; while (rem_size) { if (ltb_size > rem_size) ltb_size = rem_size; rem_size -= ltb_size; rc = alloc_long_term_buff(adapter, &new_set.ltbs[i], ltb_size); if (rc) goto out; i++; } WARN_ON(i != new_set.num_ltbs); return 0; out: /* We may have allocated one/more LTBs before failing and we * want to try and reuse on next reset. So don't free ltb set. */ return rc; } /** * map_rxpool_buf_to_ltb - Map given rxpool buffer to offset in an LTB. * @rxpool: The receive buffer pool containing buffer * @bufidx: Index of buffer in rxpool * @ltbp: (Output) pointer to the long term buffer containing the buffer * @offset: (Output) offset of buffer in the LTB from @ltbp * * Map the given buffer identified by [rxpool, bufidx] to an LTB in the * pool and its corresponding offset. Assume for now that each LTB is of * different size but could possibly be optimized based on the allocation * strategy in alloc_ltb_set(). */ static void map_rxpool_buf_to_ltb(struct ibmvnic_rx_pool *rxpool, unsigned int bufidx, struct ibmvnic_long_term_buff **ltbp, unsigned int *offset) { struct ibmvnic_long_term_buff *ltb; int nbufs; /* # of buffers in one ltb */ int i; WARN_ON(bufidx >= rxpool->size); for (i = 0; i < rxpool->ltb_set.num_ltbs; i++) { ltb = &rxpool->ltb_set.ltbs[i]; nbufs = ltb->size / rxpool->buff_size; if (bufidx < nbufs) break; bufidx -= nbufs; } *ltbp = ltb; *offset = bufidx * rxpool->buff_size; } /** * map_txpool_buf_to_ltb - Map given txpool buffer to offset in an LTB. * @txpool: The transmit buffer pool containing buffer * @bufidx: Index of buffer in txpool * @ltbp: (Output) pointer to the long term buffer (LTB) containing the buffer * @offset: (Output) offset of buffer in the LTB from @ltbp * * Map the given buffer identified by [txpool, bufidx] to an LTB in the * pool and its corresponding offset. */ static void map_txpool_buf_to_ltb(struct ibmvnic_tx_pool *txpool, unsigned int bufidx, struct ibmvnic_long_term_buff **ltbp, unsigned int *offset) { struct ibmvnic_long_term_buff *ltb; int nbufs; /* # of buffers in one ltb */ int i; WARN_ON_ONCE(bufidx >= txpool->num_buffers); for (i = 0; i < txpool->ltb_set.num_ltbs; i++) { ltb = &txpool->ltb_set.ltbs[i]; nbufs = ltb->size / txpool->buf_size; if (bufidx < nbufs) break; bufidx -= nbufs; } *ltbp = ltb; *offset = bufidx * txpool->buf_size; } static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) { int i; for (i = 0; i < adapter->num_active_rx_pools; i++) adapter->rx_pool[i].active = 0; } static void replenish_rx_pool(struct ibmvnic_adapter *adapter, struct ibmvnic_rx_pool *pool) { int count = pool->size - atomic_read(&pool->available); u64 handle = adapter->rx_scrq[pool->index]->handle; struct device *dev = &adapter->vdev->dev; struct ibmvnic_ind_xmit_queue *ind_bufp; struct ibmvnic_sub_crq_queue *rx_scrq; struct ibmvnic_long_term_buff *ltb; union sub_crq *sub_crq; int buffers_added = 0; unsigned long lpar_rc; struct sk_buff *skb; unsigned int offset; dma_addr_t dma_addr; unsigned char *dst; int shift = 0; int bufidx; int i; if (!pool->active) return; rx_scrq = adapter->rx_scrq[pool->index]; ind_bufp = &rx_scrq->ind_buf; /* netdev_skb_alloc() could have failed after we saved a few skbs * in the indir_buf and we would not have sent them to VIOS yet. * To account for them, start the loop at ind_bufp->index rather * than 0. If we pushed all the skbs to VIOS, ind_bufp->index will * be 0. */ for (i = ind_bufp->index; i < count; ++i) { bufidx = pool->free_map[pool->next_free]; /* We maybe reusing the skb from earlier resets. Allocate * only if necessary. But since the LTB may have changed * during reset (see init_rx_pools()), update LTB below * even if reusing skb. */ skb = pool->rx_buff[bufidx].skb; if (!skb) { skb = netdev_alloc_skb(adapter->netdev, pool->buff_size); if (!skb) { dev_err(dev, "Couldn't replenish rx buff\n"); adapter->replenish_no_mem++; break; } } pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; pool->next_free = (pool->next_free + 1) % pool->size; /* Copy the skb to the long term mapped DMA buffer */ map_rxpool_buf_to_ltb(pool, bufidx, <b, &offset); dst = ltb->buff + offset; memset(dst, 0, pool->buff_size); dma_addr = ltb->addr + offset; /* add the skb to an rx_buff in the pool */ pool->rx_buff[bufidx].data = dst; pool->rx_buff[bufidx].dma = dma_addr; pool->rx_buff[bufidx].skb = skb; pool->rx_buff[bufidx].pool_index = pool->index; pool->rx_buff[bufidx].size = pool->buff_size; /* queue the rx_buff for the next send_subcrq_indirect */ sub_crq = &ind_bufp->indir_arr[ind_bufp->index++]; memset(sub_crq, 0, sizeof(*sub_crq)); sub_crq->rx_add.first = IBMVNIC_CRQ_CMD; sub_crq->rx_add.correlator = cpu_to_be64((u64)&pool->rx_buff[bufidx]); sub_crq->rx_add.ioba = cpu_to_be32(dma_addr); sub_crq->rx_add.map_id = ltb->map_id; /* The length field of the sCRQ is defined to be 24 bits so the * buffer size needs to be left shifted by a byte before it is * converted to big endian to prevent the last byte from being * truncated. */ #ifdef __LITTLE_ENDIAN__ shift = 8; #endif sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift); /* if send_subcrq_indirect queue is full, flush to VIOS */ if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS || i == count - 1) { lpar_rc = send_subcrq_indirect(adapter, handle, (u64)ind_bufp->indir_dma, (u64)ind_bufp->index); if (lpar_rc != H_SUCCESS) goto failure; buffers_added += ind_bufp->index; adapter->replenish_add_buff_success += ind_bufp->index; ind_bufp->index = 0; } } atomic_add(buffers_added, &pool->available); return; failure: if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); for (i = ind_bufp->index - 1; i >= 0; --i) { struct ibmvnic_rx_buff *rx_buff; pool->next_free = pool->next_free == 0 ? pool->size - 1 : pool->next_free - 1; sub_crq = &ind_bufp->indir_arr[i]; rx_buff = (struct ibmvnic_rx_buff *) be64_to_cpu(sub_crq->rx_add.correlator); bufidx = (int)(rx_buff - pool->rx_buff); pool->free_map[pool->next_free] = bufidx; dev_kfree_skb_any(pool->rx_buff[bufidx].skb); pool->rx_buff[bufidx].skb = NULL; } adapter->replenish_add_buff_failure += ind_bufp->index; atomic_add(buffers_added, &pool->available); ind_bufp->index = 0; if (lpar_rc == H_CLOSED || adapter->failover_pending) { /* Disable buffer pool replenishment and report carrier off if * queue is closed or pending failover. * Firmware guarantees that a signal will be sent to the * driver, triggering a reset. */ deactivate_rx_pools(adapter); netif_carrier_off(adapter->netdev); } } static void replenish_pools(struct ibmvnic_adapter *adapter) { int i; adapter->replenish_task_cycles++; for (i = 0; i < adapter->num_active_rx_pools; i++) { if (adapter->rx_pool[i].active) replenish_rx_pool(adapter, &adapter->rx_pool[i]); } netdev_dbg(adapter->netdev, "Replenished %d pools\n", i); } static void release_stats_buffers(struct ibmvnic_adapter *adapter) { kfree(adapter->tx_stats_buffers); kfree(adapter->rx_stats_buffers); adapter->tx_stats_buffers = NULL; adapter->rx_stats_buffers = NULL; } static int init_stats_buffers(struct ibmvnic_adapter *adapter) { adapter->tx_stats_buffers = kcalloc(IBMVNIC_MAX_QUEUES, sizeof(struct ibmvnic_tx_queue_stats), GFP_KERNEL); if (!adapter->tx_stats_buffers) return -ENOMEM; adapter->rx_stats_buffers = kcalloc(IBMVNIC_MAX_QUEUES, sizeof(struct ibmvnic_rx_queue_stats), GFP_KERNEL); if (!adapter->rx_stats_buffers) return -ENOMEM; return 0; } static void release_stats_token(struct ibmvnic_adapter *adapter) { struct device *dev = &adapter->vdev->dev; if (!adapter->stats_token) return; dma_unmap_single(dev, adapter->stats_token, sizeof(struct ibmvnic_statistics), DMA_FROM_DEVICE); adapter->stats_token = 0; } static int init_stats_token(struct ibmvnic_adapter *adapter) { struct device *dev = &adapter->vdev->dev; dma_addr_t stok; int rc; stok = dma_map_single(dev, &adapter->stats, sizeof(struct ibmvnic_statistics), DMA_FROM_DEVICE); rc = dma_mapping_error(dev, stok); if (rc) { dev_err(dev, "Couldn't map stats buffer, rc = %d\n", rc); return rc; } adapter->stats_token = stok; netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); return 0; } /** * release_rx_pools() - Release any rx pools attached to @adapter. * @adapter: ibmvnic adapter * * Safe to call this multiple times - even if no pools are attached. */ static void release_rx_pools(struct ibmvnic_adapter *adapter) { struct ibmvnic_rx_pool *rx_pool; int i, j; if (!adapter->rx_pool) return; for (i = 0; i < adapter->num_active_rx_pools; i++) { rx_pool = &adapter->rx_pool[i]; netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); kfree(rx_pool->free_map); free_ltb_set(adapter, &rx_pool->ltb_set); if (!rx_pool->rx_buff) continue; for (j = 0; j < rx_pool->size; j++) { if (rx_pool->rx_buff[j].skb) { dev_kfree_skb_any(rx_pool->rx_buff[j].skb); rx_pool->rx_buff[j].skb = NULL; } } kfree(rx_pool->rx_buff); } kfree(adapter->rx_pool); adapter->rx_pool = NULL; adapter->num_active_rx_pools = 0; adapter->prev_rx_pool_size = 0; } /** * reuse_rx_pools() - Check if the existing rx pools can be reused. * @adapter: ibmvnic adapter * * Check if the existing rx pools in the adapter can be reused. The * pools can be reused if the pool parameters (number of pools, * number of buffers in the pool and size of each buffer) have not * changed. * * NOTE: This assumes that all pools have the same number of buffers * which is the case currently. If that changes, we must fix this. * * Return: true if the rx pools can be reused, false otherwise. */ static bool reuse_rx_pools(struct ibmvnic_adapter *adapter) { u64 old_num_pools, new_num_pools; u64 old_pool_size, new_pool_size; u64 old_buff_size, new_buff_size; if (!adapter->rx_pool) return false; old_num_pools = adapter->num_active_rx_pools; new_num_pools = adapter->req_rx_queues; old_pool_size = adapter->prev_rx_pool_size; new_pool_size = adapter->req_rx_add_entries_per_subcrq; old_buff_size = adapter->prev_rx_buf_sz; new_buff_size = adapter->cur_rx_buf_sz; if (old_buff_size != new_buff_size || old_num_pools != new_num_pools || old_pool_size != new_pool_size) return false; return true; } /** * init_rx_pools(): Initialize the set of receiver pools in the adapter. * @netdev: net device associated with the vnic interface * * Initialize the set of receiver pools in the ibmvnic adapter associated * with the net_device @netdev. If possible, reuse the existing rx pools. * Otherwise free any existing pools and allocate a new set of pools * before initializing them. * * Return: 0 on success and negative value on error. */ static int init_rx_pools(struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); struct device *dev = &adapter->vdev->dev; struct ibmvnic_rx_pool *rx_pool; u64 num_pools; u64 pool_size; /* # of buffers in one pool */ u64 buff_size; int i, j, rc; pool_size = adapter->req_rx_add_entries_per_subcrq; num_pools = adapter->req_rx_queues; buff_size = adapter->cur_rx_buf_sz; if (reuse_rx_pools(adapter)) { dev_dbg(dev, "Reusing rx pools\n"); goto update_ltb; } /* Allocate/populate the pools. */ release_rx_pools(adapter); adapter->rx_pool = kcalloc(num_pools, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL); if (!adapter->rx_pool) { dev_err(dev, "Failed to allocate rx pools\n"); return -ENOMEM; } /* Set num_active_rx_pools early. If we fail below after partial * allocation, release_rx_pools() will know how many to look for. */ adapter->num_active_rx_pools = num_pools; for (i = 0; i < num_pools; i++) { rx_pool = &adapter->rx_pool[i]; netdev_dbg(adapter->netdev, "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", i, pool_size, buff_size); rx_pool->size = pool_size; rx_pool->index = i; rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), GFP_KERNEL); if (!rx_pool->free_map) { dev_err(dev, "Couldn't alloc free_map %d\n", i); rc = -ENOMEM; goto out_release; } rx_pool->rx_buff = kcalloc(rx_pool->size, sizeof(struct ibmvnic_rx_buff), GFP_KERNEL); if (!rx_pool->rx_buff) { dev_err(dev, "Couldn't alloc rx buffers\n"); rc = -ENOMEM; goto out_release; } } adapter->prev_rx_pool_size = pool_size; adapter->prev_rx_buf_sz = adapter->cur_rx_buf_sz; update_ltb: for (i = 0; i < num_pools; i++) { rx_pool = &adapter->rx_pool[i]; dev_dbg(dev, "Updating LTB for rx pool %d [%d, %d]\n", i, rx_pool->size, rx_pool->buff_size); rc = alloc_ltb_set(adapter, &rx_pool->ltb_set, rx_pool->size, rx_pool->buff_size); if (rc) goto out; for (j = 0; j < rx_pool->size; ++j) { struct ibmvnic_rx_buff *rx_buff; rx_pool->free_map[j] = j; /* NOTE: Don't clear rx_buff->skb here - will leak * memory! replenish_rx_pool() will reuse skbs or * allocate as necessary. */ rx_buff = &rx_pool->rx_buff[j]; rx_buff->dma = 0; rx_buff->data = 0; rx_buff->size = 0; rx_buff->pool_index = 0; } /* Mark pool "empty" so replenish_rx_pools() will * update the LTB info for each buffer */ atomic_set(&rx_pool->available, 0); rx_pool->next_alloc = 0; rx_pool->next_free = 0; /* replenish_rx_pool() may have called deactivate_rx_pools() * on failover. Ensure pool is active now. */ rx_pool->active = 1; } return 0; out_release: release_rx_pools(adapter); out: /* We failed to allocate one or more LTBs or map them on the VIOS. * Hold onto the pools and any LTBs that we did allocate/map. */ return rc; } static void release_vpd_data(struct ibmvnic_adapter *adapter) { if (!adapter->vpd) return; kfree(adapter->vpd->buff); kfree(adapter->vpd); adapter->vpd = NULL; } static void release_one_tx_pool(struct ibmvnic_adapter *adapter, struct ibmvnic_tx_pool *tx_pool) { kfree(tx_pool->tx_buff); kfree(tx_pool->free_map); free_ltb_set(adapter, &tx_pool->ltb_set); } /** * release_tx_pools() - Release any tx pools attached to @adapter. * @adapter: ibmvnic adapter * * Safe to call this multiple times - even if no pools are attached. */ static void release_tx_pools(struct ibmvnic_adapter *adapter) { int i; /* init_tx_pools() ensures that ->tx_pool and ->tso_pool are * both NULL or both non-NULL. So we only need to check one. */ if (!adapter->tx_pool) return; for (i = 0; i < adapter->num_active_tx_pools; i++) { release_one_tx_pool(adapter, &adapter->tx_pool[i]); release_one_tx_pool(adapter, &adapter->tso_pool[i]); } kfree(adapter->tx_pool); adapter->tx_pool = NULL; kfree(adapter->tso_pool); adapter->tso_pool = NULL; adapter->num_active_tx_pools = 0; adapter->prev_tx_pool_size = 0; } static int init_one_tx_pool(struct net_device *netdev, struct ibmvnic_tx_pool *tx_pool, int pool_size, int buf_size) { int i; tx_pool->tx_buff = kcalloc(pool_size, sizeof(struct ibmvnic_tx_buff), GFP_KERNEL); if (!tx_pool->tx_buff) return -ENOMEM; tx_pool->free_map = kcalloc(pool_size, sizeof(int), GFP_KERNEL); if (!tx_pool->free_map) { kfree(tx_pool->tx_buff); tx_pool->tx_buff = NULL; return -ENOMEM; } for (i = 0; i < pool_size; i++) tx_pool->free_map[i] = i; tx_pool->consumer_index = 0; tx_pool->producer_index = 0; tx_pool->num_buffers = pool_size; tx_pool->buf_size = buf_size; return 0; } /** * reuse_tx_pools() - Check if the existing tx pools can be reused. * @adapter: ibmvnic adapter * * Check if the existing tx pools in the adapter can be reused. The * pools can be reused if the pool parameters (number of pools, * number of buffers in the pool and mtu) have not changed. * * NOTE: This assumes that all pools have the same number of buffers * which is the case currently. If that changes, we must fix this. * * Return: true if the tx pools can be reused, false otherwise. */ static bool reuse_tx_pools(struct ibmvnic_adapter *adapter) { u64 old_num_pools, new_num_pools; u64 old_pool_size, new_pool_size; u64 old_mtu, new_mtu; if (!adapter->tx_pool) return false; old_num_pools = adapter->num_active_tx_pools; new_num_pools = adapter->num_active_tx_scrqs; old_pool_size = adapter->prev_tx_pool_size; new_pool_size = adapter->req_tx_entries_per_subcrq; old_mtu = adapter->prev_mtu; new_mtu = adapter->req_mtu; if (old_mtu != new_mtu || old_num_pools != new_num_pools || old_pool_size != new_pool_size) return false; return true; } /** * init_tx_pools(): Initialize the set of transmit pools in the adapter. * @netdev: net device associated with the vnic interface * * Initialize the set of transmit pools in the ibmvnic adapter associated * with the net_device @netdev. If possible, reuse the existing tx pools. * Otherwise free any existing pools and allocate a new set of pools * before initializing them. * * Return: 0 on success and negative value on error. */ static int init_tx_pools(struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); struct device *dev = &adapter->vdev->dev; int num_pools; u64 pool_size; /* # of buffers in pool */ u64 buff_size; int i, j, rc; num_pools = adapter->req_tx_queues; /* We must notify the VIOS about the LTB on all resets - but we only * need to alloc/populate pools if either the number of buffers or * size of each buffer in the pool has changed. */ if (reuse_tx_pools(adapter)) { netdev_dbg(netdev, "Reusing tx pools\n"); goto update_ltb; } /* Allocate/populate the pools. */ release_tx_pools(adapter); pool_size = adapter->req_tx_entries_per_subcrq; num_pools = adapter->num_active_tx_scrqs; adapter->tx_pool = kcalloc(num_pools, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); if (!adapter->tx_pool) return -ENOMEM; adapter->tso_pool = kcalloc(num_pools, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); /* To simplify release_tx_pools() ensure that ->tx_pool and * ->tso_pool are either both NULL or both non-NULL. */ if (!adapter->tso_pool) { kfree(adapter->tx_pool); adapter->tx_pool = NULL; return -ENOMEM; } /* Set num_active_tx_pools early. If we fail below after partial * allocation, release_tx_pools() will know how many to look for. */ adapter->num_active_tx_pools = num_pools; buff_size = adapter->req_mtu + VLAN_HLEN; buff_size = ALIGN(buff_size, L1_CACHE_BYTES); for (i = 0; i < num_pools; i++) { dev_dbg(dev, "Init tx pool %d [%llu, %llu]\n", i, adapter->req_tx_entries_per_subcrq, buff_size); rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], pool_size, buff_size); if (rc) goto out_release; rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], IBMVNIC_TSO_BUFS, IBMVNIC_TSO_BUF_SZ); if (rc) goto out_release; } adapter->prev_tx_pool_size = pool_size; adapter->prev_mtu = adapter->req_mtu; update_ltb: /* NOTE: All tx_pools have the same number of buffers (which is * same as pool_size). All tso_pools have IBMVNIC_TSO_BUFS * buffers (see calls init_one_tx_pool() for these). * For consistency, we use tx_pool->num_buffers and * tso_pool->num_buffers below. */ rc = -1; for (i = 0; i < num_pools; i++) { struct ibmvnic_tx_pool *tso_pool; struct ibmvnic_tx_pool *tx_pool; tx_pool = &adapter->tx_pool[i]; dev_dbg(dev, "Updating LTB for tx pool %d [%d, %d]\n", i, tx_pool->num_buffers, tx_pool->buf_size); rc = alloc_ltb_set(adapter, &tx_pool->ltb_set, tx_pool->num_buffers, tx_pool->buf_size); if (rc) goto out; tx_pool->consumer_index = 0; tx_pool->producer_index = 0; for (j = 0; j < tx_pool->num_buffers; j++) tx_pool->free_map[j] = j; tso_pool = &adapter->tso_pool[i]; dev_dbg(dev, "Updating LTB for tso pool %d [%d, %d]\n", i, tso_pool->num_buffers, tso_pool->buf_size); rc = alloc_ltb_set(adapter, &tso_pool->ltb_set, tso_pool->num_buffers, tso_pool->buf_size); if (rc) goto out; tso_pool->consumer_index = 0; tso_pool->producer_index = 0; for (j = 0; j < tso_pool->num_buffers; j++) tso_pool->free_map[j] = j; } return 0; out_release: release_tx_pools(adapter); out: /* We failed to allocate one or more LTBs or map them on the VIOS. * Hold onto the pools and any LTBs that we did allocate/map. */ return rc; } static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) { int i; if (adapter->napi_enabled) return; for (i = 0; i < adapter->req_rx_queues; i++) napi_enable(&adapter->napi[i]); adapter->napi_enabled = true; } static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) { int i; if (!adapter->napi_enabled) return; for (i = 0; i < adapter->req_rx_queues; i++) { netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); napi_disable(&adapter->napi[i]); } adapter->napi_enabled = false; } static int init_napi(struct ibmvnic_adapter *adapter) { int i; adapter->napi = kcalloc(adapter->req_rx_queues, sizeof(struct napi_struct), GFP_KERNEL); if (!adapter->napi) return -ENOMEM; for (i = 0; i < adapter->req_rx_queues; i++) { netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); netif_napi_add(adapter->netdev, &adapter->napi[i], ibmvnic_poll); } adapter->num_active_rx_napi = adapter->req_rx_queues; return 0; } static void release_napi(struct ibmvnic_adapter *adapter) { int i; if (!adapter->napi) return; for (i = 0; i < adapter->num_active_rx_napi; i++) { netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); netif_napi_del(&adapter->napi[i]); } kfree(adapter->napi); adapter->napi = NULL; adapter->num_active_rx_napi = 0; adapter->napi_enabled = false; } static const char *adapter_state_to_string(enum vnic_state state) { switch (state) { case VNIC_PROBING: return "PROBING"; case VNIC_PROBED: return "PROBED"; case VNIC_OPENING: return "OPENING"; case VNIC_OPEN: return "OPEN"; case VNIC_CLOSING: return "CLOSING"; case VNIC_CLOSED: return "CLOSED"; case VNIC_REMOVING: return "REMOVING"; case VNIC_REMOVED: return "REMOVED"; case VNIC_DOWN: return "DOWN"; } return "UNKNOWN"; } static int ibmvnic_login(struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); unsigned long timeout = msecs_to_jiffies(20000); int retry_count = 0; int retries = 10; bool retry; int rc; do { retry = false; if (retry_count > retries) { netdev_warn(netdev, "Login attempts exceeded\n"); return -EACCES; } adapter->init_done_rc = 0; reinit_completion(&adapter->init_done); rc = send_login(adapter); if (rc) return rc; if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { netdev_warn(netdev, "Login timed out, retrying...\n"); retry = true; adapter->init_done_rc = 0; retry_count++; continue; } if (adapter->init_done_rc == ABORTED) { netdev_warn(netdev, "Login aborted, retrying...\n"); retry = true; adapter->init_done_rc = 0; retry_count++; /* FW or device may be busy, so * wait a bit before retrying login */ msleep(500); } else if (adapter->init_done_rc == PARTIALSUCCESS) { retry_count++; release_sub_crqs(adapter, 1); retry = true; netdev_dbg(netdev, "Received partial success, retrying...\n"); adapter->init_done_rc = 0; reinit_completion(&adapter->init_done); send_query_cap(adapter); if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { netdev_warn(netdev, "Capabilities query timed out\n"); return -ETIMEDOUT; } rc = init_sub_crqs(adapter); if (rc) { netdev_warn(netdev, "SCRQ initialization failed\n"); return rc; } rc = init_sub_crq_irqs(adapter); if (rc) { netdev_warn(netdev, "SCRQ irq initialization failed\n"); return rc; } } else if (adapter->init_done_rc) { netdev_warn(netdev, "Adapter login failed, init_done_rc = %d\n", adapter->init_done_rc); return -EIO; } } while (retry); __ibmvnic_set_mac(netdev, adapter->mac_addr); netdev_dbg(netdev, "[S:%s] Login succeeded\n", adapter_state_to_string(adapter->state)); return 0; } static void release_login_buffer(struct ibmvnic_adapter *adapter) { kfree(adapter->login_buf); adapter->login_buf = NULL; } static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) { kfree(adapter->login_rsp_buf); adapter->login_rsp_buf = NULL; } static void release_resources(struct ibmvnic_adapter *adapter) { release_vpd_data(adapter); release_napi(adapter); release_login_buffer(adapter); release_login_rsp_buffer(adapter); } static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) { struct net_device *netdev = adapter->netdev; unsigned long timeout = msecs_to_jiffies(20000); union ibmvnic_crq crq; bool resend; int rc; netdev_dbg(netdev, "setting link state %d\n", link_state); memset(&crq, 0, sizeof(crq)); crq.logical_link_state.first = IBMVNIC_CRQ_CMD; crq.logical_link_state.cmd = LOGICAL_LINK_STATE; crq.logical_link_state.link_state = link_state; do { resend = false; reinit_completion(&adapter->init_done); rc = ibmvnic_send_crq(adapter, &crq); if (rc) { netdev_err(netdev, "Failed to set link state\n"); return rc; } if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { netdev_err(netdev, "timeout setting link state\n"); return -ETIMEDOUT; } if (adapter->init_done_rc == PARTIALSUCCESS) { /* Partuial success, delay and re-send */ mdelay(1000); resend = true; } else if (adapter->init_done_rc) { netdev_warn(netdev, "Unable to set link state, rc=%d\n", adapter->init_done_rc); return adapter->init_done_rc; } } while (resend); return 0; } static int set_real_num_queues(struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); int rc; netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", adapter->req_tx_queues, adapter->req_rx_queues); rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); if (rc) { netdev_err(netdev, "failed to set the number of tx queues\n"); return rc; } rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); if (rc) netdev_err(netdev, "failed to set the number of rx queues\n"); return rc; } static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) { struct device *dev = &adapter->vdev->dev; union ibmvnic_crq crq; int len = 0; int rc; if (adapter->vpd->buff) len = adapter->vpd->len; mutex_lock(&adapter->fw_lock); adapter->fw_done_rc = 0; reinit_completion(&adapter->fw_done); crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; crq.get_vpd_size.cmd = GET_VPD_SIZE; rc = ibmvnic_send_crq(adapter, &crq); if (rc) { mutex_unlock(&adapter->fw_lock); return rc; } rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); if (rc) { dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); mutex_unlock(&adapter->fw_lock); return rc; } mutex_unlock(&adapter->fw_lock); if (!adapter->vpd->len) return -ENODATA; if (!adapter->vpd->buff) adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); else if (adapter->vpd->len != len) adapter->vpd->buff = krealloc(adapter->vpd->buff, adapter->vpd->len, GFP_KERNEL); if (!adapter->vpd->buff) { dev_err(dev, "Could allocate VPD buffer\n"); return -ENOMEM; } adapter->vpd->dma_addr = dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, DMA_FROM_DEVICE); if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { dev_err(dev, "Could not map VPD buffer\n"); kfree(adapter->vpd->buff); adapter->vpd->buff = NULL; return -ENOMEM; } mutex_lock(&adapter->fw_lock); adapter->fw_done_rc = 0; reinit_completion(&adapter->fw_done); crq.get_vpd.first = IBMVNIC_CRQ_CMD; crq.get_vpd.cmd = GET_VPD; crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); rc = ibmvnic_send_crq(adapter, &crq); if (rc) { kfree(adapter->vpd->buff); adapter->vpd->buff = NULL; mutex_unlock(&adapter->fw_lock); return rc; } rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); if (rc) { dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); kfree(adapter->vpd->buff); adapter->vpd->buff = NULL; mutex_unlock(&adapter->fw_lock); return rc; } mutex_unlock(&adapter->fw_lock); return 0; } static int init_resources(struct ibmvnic_adapter *adapter) { struct net_device *netdev = adapter->netdev; int rc; rc = set_real_num_queues(netdev); if (rc) return rc; adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); if (!adapter->vpd) return -ENOMEM; /* Vital Product Data (VPD) */ rc = ibmvnic_get_vpd(adapter); if (rc) { netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); return rc; } rc = init_napi(adapter); if (rc) return rc; send_query_map(adapter); rc = init_rx_pools(netdev); if (rc) return rc; rc = init_tx_pools(netdev); return rc; } static int __ibmvnic_open(struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); enum vnic_state prev_state = adapter->state; int i, rc; adapter->state = VNIC_OPENING; replenish_pools(adapter); ibmvnic_napi_enable(adapter); /* We're ready to receive frames, enable the sub-crq interrupts and * set the logical link state to up */ for (i = 0; i < adapter->req_rx_queues; i++) { netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); if (prev_state == VNIC_CLOSED) enable_irq(adapter->rx_scrq[i]->irq); enable_scrq_irq(adapter, adapter->rx_scrq[i]); } for (i = 0; i < adapter->req_tx_queues; i++) { netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); if (prev_state == VNIC_CLOSED) enable_irq(adapter->tx_scrq[i]->irq); enable_scrq_irq(adapter, adapter->tx_scrq[i]); netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i)); } rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); if (rc) { ibmvnic_napi_disable(adapter); ibmvnic_disable_irqs(adapter); return rc; } adapter->tx_queues_active = true; /* Since queues were stopped until now, there shouldn't be any * one in ibmvnic_complete_tx() or ibmvnic_xmit() so maybe we * don't need the synchronize_rcu()? Leaving it for consistency * with setting ->tx_queues_active = false. */ synchronize_rcu(); netif_tx_start_all_queues(netdev); if (prev_state == VNIC_CLOSED) { for (i = 0; i < adapter->req_rx_queues; i++) napi_schedule(&adapter->napi[i]); } adapter->state = VNIC_OPEN; return rc; } static int ibmvnic_open(struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); int rc; ASSERT_RTNL(); /* If device failover is pending or we are about to reset, just set * device state and return. Device operation will be handled by reset * routine. * * It should be safe to overwrite the adapter->state here. Since * we hold the rtnl, either the reset has not actually started or * the rtnl got dropped during the set_link_state() in do_reset(). * In the former case, no one else is changing the state (again we * have the rtnl) and in the latter case, do_reset() will detect and * honor our setting below. */ if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) { netdev_dbg(netdev, "[S:%s FOP:%d] Resetting, deferring open\n", adapter_state_to_string(adapter->state), adapter->failover_pending); adapter->state = VNIC_OPEN; rc = 0; goto out; } if (adapter->state != VNIC_CLOSED) { rc = ibmvnic_login(netdev); if (rc) goto out; rc = init_resources(adapter); if (rc) { netdev_err(netdev, "failed to initialize resources\n"); goto out; } } rc = __ibmvnic_open(netdev); out: /* If open failed and there is a pending failover or in-progress reset, * set device state and return. Device operation will be handled by * reset routine. See also comments above regarding rtnl. */ if (rc && (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) { adapter->state = VNIC_OPEN; rc = 0; } if (rc) { release_resources(adapter); release_rx_pools(adapter); release_tx_pools(adapter); } return rc; } static void clean_rx_pools(struct ibmvnic_adapter *adapter) { struct ibmvnic_rx_pool *rx_pool; struct ibmvnic_rx_buff *rx_buff; u64 rx_entries; int rx_scrqs; int i, j; if (!adapter->rx_pool) return; rx_scrqs = adapter->num_active_rx_pools; rx_entries = adapter->req_rx_add_entries_per_subcrq; /* Free any remaining skbs in the rx buffer pools */ for (i = 0; i < rx_scrqs; i++) { rx_pool = &adapter->rx_pool[i]; if (!rx_pool || !rx_pool->rx_buff) continue; netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); for (j = 0; j < rx_entries; j++) { rx_buff = &rx_pool->rx_buff[j]; if (rx_buff && rx_buff->skb) { dev_kfree_skb_any(rx_buff->skb); rx_buff->skb = NULL; } } } } static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, struct ibmvnic_tx_pool *tx_pool) { struct ibmvnic_tx_buff *tx_buff; u64 tx_entries; int i; if (!tx_pool || !tx_pool->tx_buff) return; tx_entries = tx_pool->num_buffers; for (i = 0; i < tx_entries; i++) { tx_buff = &tx_pool->tx_buff[i]; if (tx_buff && tx_buff->skb) { dev_kfree_skb_any(tx_buff->skb); tx_buff->skb = NULL; } } } static void clean_tx_pools(struct ibmvnic_adapter *adapter) { int tx_scrqs; int i; if (!adapter->tx_pool || !adapter->tso_pool) return; tx_scrqs = adapter->num_active_tx_pools; /* Free any remaining skbs in the tx buffer pools */ for (i = 0; i < tx_scrqs; i++) { netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); clean_one_tx_pool(adapter, &adapter->tx_pool[i]); clean_one_tx_pool(adapter, &adapter->tso_pool[i]); } } static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) { struct net_device *netdev = adapter->netdev; int i; if (adapter->tx_scrq) { for (i = 0; i < adapter->req_tx_queues; i++) if (adapter->tx_scrq[i]->irq) { netdev_dbg(netdev, "Disabling tx_scrq[%d] irq\n", i); disable_scrq_irq(adapter, adapter->tx_scrq[i]); disable_irq(adapter->tx_scrq[i]->irq); } } if (adapter->rx_scrq) { for (i = 0; i < adapter->req_rx_queues; i++) { if (adapter->rx_scrq[i]->irq) { netdev_dbg(netdev, "Disabling rx_scrq[%d] irq\n", i); disable_scrq_irq(adapter, adapter->rx_scrq[i]); disable_irq(adapter->rx_scrq[i]->irq); } } } } static void ibmvnic_cleanup(struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); /* ensure that transmissions are stopped if called by do_reset */ adapter->tx_queues_active = false; /* Ensure complete_tx() and ibmvnic_xmit() see ->tx_queues_active * update so they don't restart a queue after we stop it below. */ synchronize_rcu(); if (test_bit(0, &adapter->resetting)) netif_tx_disable(netdev); else netif_tx_stop_all_queues(netdev); ibmvnic_napi_disable(adapter); ibmvnic_disable_irqs(adapter); } static int __ibmvnic_close(struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); int rc = 0; adapter->state = VNIC_CLOSING; rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); adapter->state = VNIC_CLOSED; return rc; } static int ibmvnic_close(struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); int rc; netdev_dbg(netdev, "[S:%s FOP:%d FRR:%d] Closing\n", adapter_state_to_string(adapter->state), adapter->failover_pending, adapter->force_reset_recovery); /* If device failover is pending, just set device state and return. * Device operation will be handled by reset routine. */ if (adapter->failover_pending) { adapter->state = VNIC_CLOSED; return 0; } rc = __ibmvnic_close(netdev); ibmvnic_cleanup(netdev); clean_rx_pools(adapter); clean_tx_pools(adapter); return rc; } /** * build_hdr_data - creates L2/L3/L4 header data buffer * @hdr_field: bitfield determining needed headers * @skb: socket buffer * @hdr_len: array of header lengths * @hdr_data: buffer to write the header to * * Reads hdr_field to determine which headers are needed by firmware. * Builds a buffer containing these headers. Saves individual header * lengths and total buffer length to be used to build descriptors. */ static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, int *hdr_len, u8 *hdr_data) { int len = 0; u8 *hdr; if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) hdr_len[0] = sizeof(struct vlan_ethhdr); else hdr_len[0] = sizeof(struct ethhdr); if (skb->protocol == htons(ETH_P_IP)) { hdr_len[1] = ip_hdr(skb)->ihl * 4; if (ip_hdr(skb)->protocol == IPPROTO_TCP) hdr_len[2] = tcp_hdrlen(skb); else if (ip_hdr(skb)->protocol == IPPROTO_UDP) hdr_len[2] = sizeof(struct udphdr); } else if (skb->protocol == htons(ETH_P_IPV6)) { hdr_len[1] = sizeof(struct ipv6hdr); if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) hdr_len[2] = tcp_hdrlen(skb); else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) hdr_len[2] = sizeof(struct udphdr); } else if (skb->protocol == htons(ETH_P_ARP)) { hdr_len[1] = arp_hdr_len(skb->dev); hdr_len[2] = 0; } memset(hdr_data, 0, 120); if ((hdr_field >> 6) & 1) { hdr = skb_mac_header(skb); memcpy(hdr_data, hdr, hdr_len[0]); len += hdr_len[0]; } if ((hdr_field >> 5) & 1) { hdr = skb_network_header(skb); memcpy(hdr_data + len, hdr, hdr_len[1]); len += hdr_len[1]; } if ((hdr_field >> 4) & 1) { hdr = skb_transport_header(skb); memcpy(hdr_data + len, hdr, hdr_len[2]); len += hdr_len[2]; } return len; } /** * create_hdr_descs - create header and header extension descriptors * @hdr_field: bitfield determining needed headers * @hdr_data: buffer containing header data * @len: length of data buffer * @hdr_len: array of individual header lengths * @scrq_arr: descriptor array * * Creates header and, if needed, header extension descriptors and * places them in a descriptor array, scrq_arr */ static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, union sub_crq *scrq_arr) { union sub_crq hdr_desc; int tmp_len = len; int num_descs = 0; u8 *data, *cur; int tmp; while (tmp_len > 0) { cur = hdr_data + len - tmp_len; memset(&hdr_desc, 0, sizeof(hdr_desc)); if (cur != hdr_data) { data = hdr_desc.hdr_ext.data; tmp = tmp_len > 29 ? 29 : tmp_len; hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; hdr_desc.hdr_ext.len = tmp; } else { data = hdr_desc.hdr.data; tmp = tmp_len > 24 ? 24 : tmp_len; hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; hdr_desc.hdr.type = IBMVNIC_HDR_DESC; hdr_desc.hdr.len = tmp; hdr_desc.hdr.l2_len = (u8)hdr_len[0]; hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); hdr_desc.hdr.l4_len = (u8)hdr_len[2]; hdr_desc.hdr.flag = hdr_field << 1; } memcpy(data, cur, tmp); tmp_len -= tmp; *scrq_arr = hdr_desc; scrq_arr++; num_descs++; } return num_descs; } /** * build_hdr_descs_arr - build a header descriptor array * @skb: tx socket buffer * @indir_arr: indirect array * @num_entries: number of descriptors to be sent * @hdr_field: bit field determining which headers will be sent * * This function will build a TX descriptor array with applicable * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. */ static void build_hdr_descs_arr(struct sk_buff *skb, union sub_crq *indir_arr, int *num_entries, u8 hdr_field) { int hdr_len[3] = {0, 0, 0}; u8 hdr_data[140] = {0}; int tot_len; tot_len = build_hdr_data(hdr_field, skb, hdr_len, hdr_data); *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, indir_arr + 1); } static int ibmvnic_xmit_workarounds(struct sk_buff *skb, struct net_device *netdev) { /* For some backing devices, mishandling of small packets * can result in a loss of connection or TX stall. Device * architects recommend that no packet should be smaller * than the minimum MTU value provided to the driver, so * pad any packets to that length */ if (skb->len < netdev->min_mtu) return skb_put_padto(skb, netdev->min_mtu); return 0; } static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, struct ibmvnic_sub_crq_queue *tx_scrq) { struct ibmvnic_ind_xmit_queue *ind_bufp; struct ibmvnic_tx_buff *tx_buff; struct ibmvnic_tx_pool *tx_pool; union sub_crq tx_scrq_entry; int queue_num; int entries; int index; int i; ind_bufp = &tx_scrq->ind_buf; entries = (u64)ind_bufp->index; queue_num = tx_scrq->pool_index; for (i = entries - 1; i >= 0; --i) { tx_scrq_entry = ind_bufp->indir_arr[i]; if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC) continue; index = be32_to_cpu(tx_scrq_entry.v1.correlator); if (index & IBMVNIC_TSO_POOL_MASK) { tx_pool = &adapter->tso_pool[queue_num]; index &= ~IBMVNIC_TSO_POOL_MASK; } else { tx_pool = &adapter->tx_pool[queue_num]; } tx_pool->free_map[tx_pool->consumer_index] = index; tx_pool->consumer_index = tx_pool->consumer_index == 0 ? tx_pool->num_buffers - 1 : tx_pool->consumer_index - 1; tx_buff = &tx_pool->tx_buff[index]; adapter->netdev->stats.tx_packets--; adapter->netdev->stats.tx_bytes -= tx_buff->skb->len; adapter->tx_stats_buffers[queue_num].packets--; adapter->tx_stats_buffers[queue_num].bytes -= tx_buff->skb->len; dev_kfree_skb_any(tx_buff->skb); tx_buff->skb = NULL; adapter->netdev->stats.tx_dropped++; } ind_bufp->index = 0; if (atomic_sub_return(entries, &tx_scrq->used) <= (adapter->req_tx_entries_per_subcrq / 2) && __netif_subqueue_stopped(adapter->netdev, queue_num)) { rcu_read_lock(); if (adapter->tx_queues_active) { netif_wake_subqueue(adapter->netdev, queue_num); netdev_dbg(adapter->netdev, "Started queue %d\n", queue_num); } rcu_read_unlock(); } } static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter, struct ibmvnic_sub_crq_queue *tx_scrq) { struct ibmvnic_ind_xmit_queue *ind_bufp; u64 dma_addr; u64 entries; u64 handle; int rc; ind_bufp = &tx_scrq->ind_buf; dma_addr = (u64)ind_bufp->indir_dma; entries = (u64)ind_bufp->index; handle = tx_scrq->handle; if (!entries) return 0; rc = send_subcrq_indirect(adapter, handle, dma_addr, entries); if (rc) ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq); else ind_bufp->index = 0; return 0; } static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); int queue_num = skb_get_queue_mapping(skb); u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; struct device *dev = &adapter->vdev->dev; struct ibmvnic_ind_xmit_queue *ind_bufp; struct ibmvnic_tx_buff *tx_buff = NULL; struct ibmvnic_sub_crq_queue *tx_scrq; struct ibmvnic_long_term_buff *ltb; struct ibmvnic_tx_pool *tx_pool; unsigned int tx_send_failed = 0; netdev_tx_t ret = NETDEV_TX_OK; unsigned int tx_map_failed = 0; union sub_crq indir_arr[16]; unsigned int tx_dropped = 0; unsigned int tx_packets = 0; unsigned int tx_bytes = 0; dma_addr_t data_dma_addr; struct netdev_queue *txq; unsigned long lpar_rc; union sub_crq tx_crq; unsigned int offset; int num_entries = 1; unsigned char *dst; int bufidx = 0; u8 proto = 0; /* If a reset is in progress, drop the packet since * the scrqs may get torn down. Otherwise use the * rcu to ensure reset waits for us to complete. */ rcu_read_lock(); if (!adapter->tx_queues_active) { dev_kfree_skb_any(skb); tx_send_failed++; tx_dropped++; ret = NETDEV_TX_OK; goto out; } tx_scrq = adapter->tx_scrq[queue_num]; txq = netdev_get_tx_queue(netdev, queue_num); ind_bufp = &tx_scrq->ind_buf; if (ibmvnic_xmit_workarounds(skb, netdev)) { tx_dropped++; tx_send_failed++; ret = NETDEV_TX_OK; ibmvnic_tx_scrq_flush(adapter, tx_scrq); goto out; } if (skb_is_gso(skb)) tx_pool = &adapter->tso_pool[queue_num]; else tx_pool = &adapter->tx_pool[queue_num]; bufidx = tx_pool->free_map[tx_pool->consumer_index]; if (bufidx == IBMVNIC_INVALID_MAP) { dev_kfree_skb_any(skb); tx_send_failed++; tx_dropped++; ibmvnic_tx_scrq_flush(adapter, tx_scrq); ret = NETDEV_TX_OK; goto out; } tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; map_txpool_buf_to_ltb(tx_pool, bufidx, <b, &offset); dst = ltb->buff + offset; memset(dst, 0, tx_pool->buf_size); data_dma_addr = ltb->addr + offset; if (skb_shinfo(skb)->nr_frags) { int cur, i; /* Copy the head */ skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); cur = skb_headlen(skb); /* Copy the frags */ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; memcpy(dst + cur, skb_frag_address(frag), skb_frag_size(frag)); cur += skb_frag_size(frag); } } else { skb_copy_from_linear_data(skb, dst, skb->len); } /* post changes to long_term_buff *dst before VIOS accessing it */ dma_wmb(); tx_pool->consumer_index = (tx_pool->consumer_index + 1) % tx_pool->num_buffers; tx_buff = &tx_pool->tx_buff[bufidx]; tx_buff->skb = skb; tx_buff->index = bufidx; tx_buff->pool_index = queue_num; memset(&tx_crq, 0, sizeof(tx_crq)); tx_crq.v1.first = IBMVNIC_CRQ_CMD; tx_crq.v1.type = IBMVNIC_TX_DESC; tx_crq.v1.n_crq_elem = 1; tx_crq.v1.n_sge = 1; tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; if (skb_is_gso(skb)) tx_crq.v1.correlator = cpu_to_be32(bufidx | IBMVNIC_TSO_POOL_MASK); else tx_crq.v1.correlator = cpu_to_be32(bufidx); tx_crq.v1.dma_reg = cpu_to_be16(ltb->map_id); tx_crq.v1.sge_len = cpu_to_be32(skb->len); tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); } if (skb->protocol == htons(ETH_P_IP)) { tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; proto = ip_hdr(skb)->protocol; } else if (skb->protocol == htons(ETH_P_IPV6)) { tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; proto = ipv6_hdr(skb)->nexthdr; } if (proto == IPPROTO_TCP) tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; else if (proto == IPPROTO_UDP) tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; if (skb->ip_summed == CHECKSUM_PARTIAL) { tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; hdrs += 2; } if (skb_is_gso(skb)) { tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); hdrs += 2; } if ((*hdrs >> 7) & 1) build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); tx_crq.v1.n_crq_elem = num_entries; tx_buff->num_entries = num_entries; /* flush buffer if current entry can not fit */ if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); if (lpar_rc != H_SUCCESS) goto tx_flush_err; } indir_arr[0] = tx_crq; memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], num_entries * sizeof(struct ibmvnic_generic_scrq)); ind_bufp->index += num_entries; if (__netdev_tx_sent_queue(txq, skb->len, netdev_xmit_more() && ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); if (lpar_rc != H_SUCCESS) goto tx_err; } if (atomic_add_return(num_entries, &tx_scrq->used) >= adapter->req_tx_entries_per_subcrq) { netdev_dbg(netdev, "Stopping queue %d\n", queue_num); netif_stop_subqueue(netdev, queue_num); } tx_packets++; tx_bytes += skb->len; txq_trans_cond_update(txq); ret = NETDEV_TX_OK; goto out; tx_flush_err: dev_kfree_skb_any(skb); tx_buff->skb = NULL; tx_pool->consumer_index = tx_pool->consumer_index == 0 ? tx_pool->num_buffers - 1 : tx_pool->consumer_index - 1; tx_dropped++; tx_err: if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) dev_err_ratelimited(dev, "tx: send failed\n"); if (lpar_rc == H_CLOSED || adapter->failover_pending) { /* Disable TX and report carrier off if queue is closed * or pending failover. * Firmware guarantees that a signal will be sent to the * driver, triggering a reset or some other action. */ netif_tx_stop_all_queues(netdev); netif_carrier_off(netdev); } out: rcu_read_unlock(); netdev->stats.tx_dropped += tx_dropped; netdev->stats.tx_bytes += tx_bytes; netdev->stats.tx_packets += tx_packets; adapter->tx_send_failed += tx_send_failed; adapter->tx_map_failed += tx_map_failed; adapter->tx_stats_buffers[queue_num].packets += tx_packets; adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; return ret; } static void ibmvnic_set_multi(struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); struct netdev_hw_addr *ha; union ibmvnic_crq crq; memset(&crq, 0, sizeof(crq)); crq.request_capability.first = IBMVNIC_CRQ_CMD; crq.request_capability.cmd = REQUEST_CAPABILITY; if (netdev->flags & IFF_PROMISC) { if (!adapter->promisc_supported) return; } else { if (netdev->flags & IFF_ALLMULTI) { /* Accept all multicast */ memset(&crq, 0, sizeof(crq)); crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; crq.multicast_ctrl.cmd = MULTICAST_CTRL; crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; ibmvnic_send_crq(adapter, &crq); } else if (netdev_mc_empty(netdev)) { /* Reject all multicast */ memset(&crq, 0, sizeof(crq)); crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; crq.multicast_ctrl.cmd = MULTICAST_CTRL; crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; ibmvnic_send_crq(adapter, &crq); } else { /* Accept one or more multicast(s) */ netdev_for_each_mc_addr(ha, netdev) { memset(&crq, 0, sizeof(crq)); crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; crq.multicast_ctrl.cmd = MULTICAST_CTRL; crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], ha->addr); ibmvnic_send_crq(adapter, &crq); } } } } static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); union ibmvnic_crq crq; int rc; if (!is_valid_ether_addr(dev_addr)) { rc = -EADDRNOTAVAIL; goto err; } memset(&crq, 0, sizeof(crq)); crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); mutex_lock(&adapter->fw_lock); adapter->fw_done_rc = 0; reinit_completion(&adapter->fw_done); rc = ibmvnic_send_crq(adapter, &crq); if (rc) { rc = -EIO; mutex_unlock(&adapter->fw_lock); goto err; } rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); /* netdev->dev_addr is changed in handle_change_mac_rsp function */ if (rc || adapter->fw_done_rc) { rc = -EIO; mutex_unlock(&adapter->fw_lock); goto err; } mutex_unlock(&adapter->fw_lock); return 0; err: ether_addr_copy(adapter->mac_addr, netdev->dev_addr); return rc; } static int ibmvnic_set_mac(struct net_device *netdev, void *p) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); struct sockaddr *addr = p; int rc; rc = 0; if (!is_valid_ether_addr(addr->sa_data)) return -EADDRNOTAVAIL; ether_addr_copy(adapter->mac_addr, addr->sa_data); if (adapter->state != VNIC_PROBED) rc = __ibmvnic_set_mac(netdev, addr->sa_data); return rc; } static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason) { switch (reason) { case VNIC_RESET_FAILOVER: return "FAILOVER"; case VNIC_RESET_MOBILITY: return "MOBILITY"; case VNIC_RESET_FATAL: return "FATAL"; case VNIC_RESET_NON_FATAL: return "NON_FATAL"; case VNIC_RESET_TIMEOUT: return "TIMEOUT"; case VNIC_RESET_CHANGE_PARAM: return "CHANGE_PARAM"; case VNIC_RESET_PASSIVE_INIT: return "PASSIVE_INIT"; } return "UNKNOWN"; } /* * Initialize the init_done completion and return code values. We * can get a transport event just after registering the CRQ and the * tasklet will use this to communicate the transport event. To ensure * we don't miss the notification/error, initialize these _before_ * regisering the CRQ. */ static inline void reinit_init_done(struct ibmvnic_adapter *adapter) { reinit_completion(&adapter->init_done); adapter->init_done_rc = 0; } /* * do_reset returns zero if we are able to keep processing reset events, or * non-zero if we hit a fatal error and must halt. */ static int do_reset(struct ibmvnic_adapter *adapter, struct ibmvnic_rwi *rwi, u32 reset_state) { struct net_device *netdev = adapter->netdev; u64 old_num_rx_queues, old_num_tx_queues; u64 old_num_rx_slots, old_num_tx_slots; int rc; netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n", adapter_state_to_string(adapter->state), adapter->failover_pending, reset_reason_to_string(rwi->reset_reason), adapter_state_to_string(reset_state)); adapter->reset_reason = rwi->reset_reason; /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) rtnl_lock(); /* Now that we have the rtnl lock, clear any pending failover. * This will ensure ibmvnic_open() has either completed or will * block until failover is complete. */ if (rwi->reset_reason == VNIC_RESET_FAILOVER) adapter->failover_pending = false; /* read the state and check (again) after getting rtnl */ reset_state = adapter->state; if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { rc = -EBUSY; goto out; } netif_carrier_off(netdev); old_num_rx_queues = adapter->req_rx_queues; old_num_tx_queues = adapter->req_tx_queues; old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; old_num_tx_slots = adapter->req_tx_entries_per_subcrq; ibmvnic_cleanup(netdev); if (reset_state == VNIC_OPEN && adapter->reset_reason != VNIC_RESET_MOBILITY && adapter->reset_reason != VNIC_RESET_FAILOVER) { if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { rc = __ibmvnic_close(netdev); if (rc) goto out; } else { adapter->state = VNIC_CLOSING; /* Release the RTNL lock before link state change and * re-acquire after the link state change to allow * linkwatch_event to grab the RTNL lock and run during * a reset. */ rtnl_unlock(); rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); rtnl_lock(); if (rc) goto out; if (adapter->state == VNIC_OPEN) { /* When we dropped rtnl, ibmvnic_open() got * it and noticed that we are resetting and * set the adapter state to OPEN. Update our * new "target" state, and resume the reset * from VNIC_CLOSING state. */ netdev_dbg(netdev, "Open changed state from %s, updating.\n", adapter_state_to_string(reset_state)); reset_state = VNIC_OPEN; adapter->state = VNIC_CLOSING; } if (adapter->state != VNIC_CLOSING) { /* If someone else changed the adapter state * when we dropped the rtnl, fail the reset */ rc = -EAGAIN; goto out; } adapter->state = VNIC_CLOSED; } } if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { release_resources(adapter); release_sub_crqs(adapter, 1); release_crq_queue(adapter); } if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { /* remove the closed state so when we call open it appears * we are coming from the probed state. */ adapter->state = VNIC_PROBED; reinit_init_done(adapter); if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { rc = init_crq_queue(adapter); } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { rc = ibmvnic_reenable_crq_queue(adapter); release_sub_crqs(adapter, 1); } else { rc = ibmvnic_reset_crq(adapter); if (rc == H_CLOSED || rc == H_SUCCESS) { rc = vio_enable_interrupts(adapter->vdev); if (rc) netdev_err(adapter->netdev, "Reset failed to enable interrupts. rc=%d\n", rc); } } if (rc) { netdev_err(adapter->netdev, "Reset couldn't initialize crq. rc=%d\n", rc); goto out; } rc = ibmvnic_reset_init(adapter, true); if (rc) goto out; /* If the adapter was in PROBE or DOWN state prior to the reset, * exit here. */ if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) { rc = 0; goto out; } rc = ibmvnic_login(netdev); if (rc) goto out; if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { rc = init_resources(adapter); if (rc) goto out; } else if (adapter->req_rx_queues != old_num_rx_queues || adapter->req_tx_queues != old_num_tx_queues || adapter->req_rx_add_entries_per_subcrq != old_num_rx_slots || adapter->req_tx_entries_per_subcrq != old_num_tx_slots || !adapter->rx_pool || !adapter->tso_pool || !adapter->tx_pool) { release_napi(adapter); release_vpd_data(adapter); rc = init_resources(adapter); if (rc) goto out; } else { rc = init_tx_pools(netdev); if (rc) { netdev_dbg(netdev, "init tx pools failed (%d)\n", rc); goto out; } rc = init_rx_pools(netdev); if (rc) { netdev_dbg(netdev, "init rx pools failed (%d)\n", rc); goto out; } } ibmvnic_disable_irqs(adapter); } adapter->state = VNIC_CLOSED; if (reset_state == VNIC_CLOSED) { rc = 0; goto out; } rc = __ibmvnic_open(netdev); if (rc) { rc = IBMVNIC_OPEN_FAILED; goto out; } /* refresh device's multicast list */ ibmvnic_set_multi(netdev); if (adapter->reset_reason == VNIC_RESET_FAILOVER || adapter->reset_reason == VNIC_RESET_MOBILITY) __netdev_notify_peers(netdev); rc = 0; out: /* restore the adapter state if reset failed */ if (rc) adapter->state = reset_state; /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) rtnl_unlock(); netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n", adapter_state_to_string(adapter->state), adapter->failover_pending, rc); return rc; } static int do_hard_reset(struct ibmvnic_adapter *adapter, struct ibmvnic_rwi *rwi, u32 reset_state) { struct net_device *netdev = adapter->netdev; int rc; netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n", reset_reason_to_string(rwi->reset_reason)); /* read the state and check (again) after getting rtnl */ reset_state = adapter->state; if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { rc = -EBUSY; goto out; } netif_carrier_off(netdev); adapter->reset_reason = rwi->reset_reason; ibmvnic_cleanup(netdev); release_resources(adapter); release_sub_crqs(adapter, 0); release_crq_queue(adapter); /* remove the closed state so when we call open it appears * we are coming from the probed state. */ adapter->state = VNIC_PROBED; reinit_init_done(adapter); rc = init_crq_queue(adapter); if (rc) { netdev_err(adapter->netdev, "Couldn't initialize crq. rc=%d\n", rc); goto out; } rc = ibmvnic_reset_init(adapter, false); if (rc) goto out; /* If the adapter was in PROBE or DOWN state prior to the reset, * exit here. */ if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) goto out; rc = ibmvnic_login(netdev); if (rc) goto out; rc = init_resources(adapter); if (rc) goto out; ibmvnic_disable_irqs(adapter); adapter->state = VNIC_CLOSED; if (reset_state == VNIC_CLOSED) goto out; rc = __ibmvnic_open(netdev); if (rc) { rc = IBMVNIC_OPEN_FAILED; goto out; } __netdev_notify_peers(netdev); out: /* restore adapter state if reset failed */ if (rc) adapter->state = reset_state; netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n", adapter_state_to_string(adapter->state), adapter->failover_pending, rc); return rc; } static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) { struct ibmvnic_rwi *rwi; unsigned long flags; spin_lock_irqsave(&adapter->rwi_lock, flags); if (!list_empty(&adapter->rwi_list)) { rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, list); list_del(&rwi->list); } else { rwi = NULL; } spin_unlock_irqrestore(&adapter->rwi_lock, flags); return rwi; } /** * do_passive_init - complete probing when partner device is detected. * @adapter: ibmvnic_adapter struct * * If the ibmvnic device does not have a partner device to communicate with at boot * and that partner device comes online at a later time, this function is called * to complete the initialization process of ibmvnic device. * Caller is expected to hold rtnl_lock(). * * Returns non-zero if sub-CRQs are not initialized properly leaving the device * in the down state. * Returns 0 upon success and the device is in PROBED state. */ static int do_passive_init(struct ibmvnic_adapter *adapter) { unsigned long timeout = msecs_to_jiffies(30000); struct net_device *netdev = adapter->netdev; struct device *dev = &adapter->vdev->dev; int rc; netdev_dbg(netdev, "Partner device found, probing.\n"); adapter->state = VNIC_PROBING; reinit_completion(&adapter->init_done); adapter->init_done_rc = 0; adapter->crq.active = true; rc = send_crq_init_complete(adapter); if (rc) goto out; rc = send_version_xchg(adapter); if (rc) netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc); if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { dev_err(dev, "Initialization sequence timed out\n"); rc = -ETIMEDOUT; goto out; } rc = init_sub_crqs(adapter); if (rc) { dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc); goto out; } rc = init_sub_crq_irqs(adapter); if (rc) { dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc); goto init_failed; } netdev->mtu = adapter->req_mtu - ETH_HLEN; netdev->min_mtu = adapter->min_mtu - ETH_HLEN; netdev->max_mtu = adapter->max_mtu - ETH_HLEN; adapter->state = VNIC_PROBED; netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n"); return 0; init_failed: release_sub_crqs(adapter, 1); out: adapter->state = VNIC_DOWN; return rc; } static void __ibmvnic_reset(struct work_struct *work) { struct ibmvnic_adapter *adapter; unsigned int timeout = 5000; struct ibmvnic_rwi *tmprwi; bool saved_state = false; struct ibmvnic_rwi *rwi; unsigned long flags; struct device *dev; bool need_reset; int num_fails = 0; u32 reset_state; int rc = 0; adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); dev = &adapter->vdev->dev; /* Wait for ibmvnic_probe() to complete. If probe is taking too long * or if another reset is in progress, defer work for now. If probe * eventually fails it will flush and terminate our work. * * Three possibilities here: * 1. Adpater being removed - just return * 2. Timed out on probe or another reset in progress - delay the work * 3. Completed probe - perform any resets in queue */ if (adapter->state == VNIC_PROBING && !wait_for_completion_timeout(&adapter->probe_done, timeout)) { dev_err(dev, "Reset thread timed out on probe"); queue_delayed_work(system_long_wq, &adapter->ibmvnic_delayed_reset, IBMVNIC_RESET_DELAY); return; } /* adapter is done with probe (i.e state is never VNIC_PROBING now) */ if (adapter->state == VNIC_REMOVING) return; /* ->rwi_list is stable now (no one else is removing entries) */ /* ibmvnic_probe() may have purged the reset queue after we were * scheduled to process a reset so there maybe no resets to process. * Before setting the ->resetting bit though, we have to make sure * that there is infact a reset to process. Otherwise we may race * with ibmvnic_open() and end up leaving the vnic down: * * __ibmvnic_reset() ibmvnic_open() * ----------------- -------------- * * set ->resetting bit * find ->resetting bit is set * set ->state to IBMVNIC_OPEN (i.e * assume reset will open device) * return * find reset queue empty * return * * Neither performed vnic login/open and vnic stays down * * If we hold the lock and conditionally set the bit, either we * or ibmvnic_open() will complete the open. */ need_reset = false; spin_lock(&adapter->rwi_lock); if (!list_empty(&adapter->rwi_list)) { if (test_and_set_bit_lock(0, &adapter->resetting)) { queue_delayed_work(system_long_wq, &adapter->ibmvnic_delayed_reset, IBMVNIC_RESET_DELAY); } else { need_reset = true; } } spin_unlock(&adapter->rwi_lock); if (!need_reset) return; rwi = get_next_rwi(adapter); while (rwi) { spin_lock_irqsave(&adapter->state_lock, flags); if (adapter->state == VNIC_REMOVING || adapter->state == VNIC_REMOVED) { spin_unlock_irqrestore(&adapter->state_lock, flags); kfree(rwi); rc = EBUSY; break; } if (!saved_state) { reset_state = adapter->state; saved_state = true; } spin_unlock_irqrestore(&adapter->state_lock, flags); if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) { rtnl_lock(); rc = do_passive_init(adapter); rtnl_unlock(); if (!rc) netif_carrier_on(adapter->netdev); } else if (adapter->force_reset_recovery) { /* Since we are doing a hard reset now, clear the * failover_pending flag so we don't ignore any * future MOBILITY or other resets. */ adapter->failover_pending = false; /* Transport event occurred during previous reset */ if (adapter->wait_for_reset) { /* Previous was CHANGE_PARAM; caller locked */ adapter->force_reset_recovery = false; rc = do_hard_reset(adapter, rwi, reset_state); } else { rtnl_lock(); adapter->force_reset_recovery = false; rc = do_hard_reset(adapter, rwi, reset_state); rtnl_unlock(); } if (rc) num_fails++; else num_fails = 0; /* If auto-priority-failover is enabled we can get * back to back failovers during resets, resulting * in at least two failed resets (from high-priority * backing device to low-priority one and then back) * If resets continue to fail beyond that, give the * adapter some time to settle down before retrying. */ if (num_fails >= 3) { netdev_dbg(adapter->netdev, "[S:%s] Hard reset failed %d times, waiting 60 secs\n", adapter_state_to_string(adapter->state), num_fails); set_current_state(TASK_UNINTERRUPTIBLE); schedule_timeout(60 * HZ); } } else { rc = do_reset(adapter, rwi, reset_state); } tmprwi = rwi; adapter->last_reset_time = jiffies; if (rc) netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); rwi = get_next_rwi(adapter); /* * If there are no resets queued and the previous reset failed, * the adapter would be in an undefined state. So retry the * previous reset as a hard reset. * * Else, free the previous rwi and, if there is another reset * queued, process the new reset even if previous reset failed * (the previous reset could have failed because of a fail * over for instance, so process the fail over). */ if (!rwi && rc) rwi = tmprwi; else kfree(tmprwi); if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || rwi->reset_reason == VNIC_RESET_MOBILITY || rc)) adapter->force_reset_recovery = true; } if (adapter->wait_for_reset) { adapter->reset_done_rc = rc; complete(&adapter->reset_done); } clear_bit_unlock(0, &adapter->resetting); netdev_dbg(adapter->netdev, "[S:%s FRR:%d WFR:%d] Done processing resets\n", adapter_state_to_string(adapter->state), adapter->force_reset_recovery, adapter->wait_for_reset); } static void __ibmvnic_delayed_reset(struct work_struct *work) { struct ibmvnic_adapter *adapter; adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_delayed_reset.work); __ibmvnic_reset(&adapter->ibmvnic_reset); } static void flush_reset_queue(struct ibmvnic_adapter *adapter) { struct list_head *entry, *tmp_entry; if (!list_empty(&adapter->rwi_list)) { list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) { list_del(entry); kfree(list_entry(entry, struct ibmvnic_rwi, list)); } } } static int ibmvnic_reset(struct ibmvnic_adapter *adapter, enum ibmvnic_reset_reason reason) { struct net_device *netdev = adapter->netdev; struct ibmvnic_rwi *rwi, *tmp; unsigned long flags; int ret; spin_lock_irqsave(&adapter->rwi_lock, flags); /* If failover is pending don't schedule any other reset. * Instead let the failover complete. If there is already a * a failover reset scheduled, we will detect and drop the * duplicate reset when walking the ->rwi_list below. */ if (adapter->state == VNIC_REMOVING || adapter->state == VNIC_REMOVED || (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { ret = EBUSY; netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); goto err; } list_for_each_entry(tmp, &adapter->rwi_list, list) { if (tmp->reset_reason == reason) { netdev_dbg(netdev, "Skipping matching reset, reason=%s\n", reset_reason_to_string(reason)); ret = EBUSY; goto err; } } rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); if (!rwi) { ret = ENOMEM; goto err; } /* if we just received a transport event, * flush reset queue and process this reset */ if (adapter->force_reset_recovery) flush_reset_queue(adapter); rwi->reset_reason = reason; list_add_tail(&rwi->list, &adapter->rwi_list); netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n", reset_reason_to_string(reason)); queue_work(system_long_wq, &adapter->ibmvnic_reset); ret = 0; err: /* ibmvnic_close() below can block, so drop the lock first */ spin_unlock_irqrestore(&adapter->rwi_lock, flags); if (ret == ENOMEM) ibmvnic_close(netdev); return -ret; } static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) { struct ibmvnic_adapter *adapter = netdev_priv(dev); if (test_bit(0, &adapter->resetting)) { netdev_err(adapter->netdev, "Adapter is resetting, skip timeout reset\n"); return; } /* No queuing up reset until at least 5 seconds (default watchdog val) * after last reset */ if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { netdev_dbg(dev, "Not yet time to tx timeout.\n"); return; } ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); } static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, struct ibmvnic_rx_buff *rx_buff) { struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; rx_buff->skb = NULL; pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); pool->next_alloc = (pool->next_alloc + 1) % pool->size; atomic_dec(&pool->available); } static int ibmvnic_poll(struct napi_struct *napi, int budget) { struct ibmvnic_sub_crq_queue *rx_scrq; struct ibmvnic_adapter *adapter; struct net_device *netdev; int frames_processed; int scrq_num; netdev = napi->dev; adapter = netdev_priv(netdev); scrq_num = (int)(napi - adapter->napi); frames_processed = 0; rx_scrq = adapter->rx_scrq[scrq_num]; restart_poll: while (frames_processed < budget) { struct sk_buff *skb; struct ibmvnic_rx_buff *rx_buff; union sub_crq *next; u32 length; u16 offset; u8 flags = 0; if (unlikely(test_bit(0, &adapter->resetting) && adapter->reset_reason != VNIC_RESET_NON_FATAL)) { enable_scrq_irq(adapter, rx_scrq); napi_complete_done(napi, frames_processed); return frames_processed; } if (!pending_scrq(adapter, rx_scrq)) break; next = ibmvnic_next_scrq(adapter, rx_scrq); rx_buff = (struct ibmvnic_rx_buff *) be64_to_cpu(next->rx_comp.correlator); /* do error checking */ if (next->rx_comp.rc) { netdev_dbg(netdev, "rx buffer returned with rc %x\n", be16_to_cpu(next->rx_comp.rc)); /* free the entry */ next->rx_comp.first = 0; dev_kfree_skb_any(rx_buff->skb); remove_buff_from_pool(adapter, rx_buff); continue; } else if (!rx_buff->skb) { /* free the entry */ next->rx_comp.first = 0; remove_buff_from_pool(adapter, rx_buff); continue; } length = be32_to_cpu(next->rx_comp.len); offset = be16_to_cpu(next->rx_comp.off_frame_data); flags = next->rx_comp.flags; skb = rx_buff->skb; /* load long_term_buff before copying to skb */ dma_rmb(); skb_copy_to_linear_data(skb, rx_buff->data + offset, length); /* VLAN Header has been stripped by the system firmware and * needs to be inserted by the driver */ if (adapter->rx_vlan_header_insertion && (flags & IBMVNIC_VLAN_STRIPPED)) __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(next->rx_comp.vlan_tci)); /* free the entry */ next->rx_comp.first = 0; remove_buff_from_pool(adapter, rx_buff); skb_put(skb, length); skb->protocol = eth_type_trans(skb, netdev); skb_record_rx_queue(skb, scrq_num); if (flags & IBMVNIC_IP_CHKSUM_GOOD && flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { skb->ip_summed = CHECKSUM_UNNECESSARY; } length = skb->len; napi_gro_receive(napi, skb); /* send it up */ netdev->stats.rx_packets++; netdev->stats.rx_bytes += length; adapter->rx_stats_buffers[scrq_num].packets++; adapter->rx_stats_buffers[scrq_num].bytes += length; frames_processed++; } if (adapter->state != VNIC_CLOSING && ((atomic_read(&adapter->rx_pool[scrq_num].available) < adapter->req_rx_add_entries_per_subcrq / 2) || frames_processed < budget)) replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); if (frames_processed < budget) { if (napi_complete_done(napi, frames_processed)) { enable_scrq_irq(adapter, rx_scrq); if (pending_scrq(adapter, rx_scrq)) { if (napi_reschedule(napi)) { disable_scrq_irq(adapter, rx_scrq); goto restart_poll; } } } } return frames_processed; } static int wait_for_reset(struct ibmvnic_adapter *adapter) { int rc, ret; adapter->fallback.mtu = adapter->req_mtu; adapter->fallback.rx_queues = adapter->req_rx_queues; adapter->fallback.tx_queues = adapter->req_tx_queues; adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; reinit_completion(&adapter->reset_done); adapter->wait_for_reset = true; rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); if (rc) { ret = rc; goto out; } rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); if (rc) { ret = -ENODEV; goto out; } ret = 0; if (adapter->reset_done_rc) { ret = -EIO; adapter->desired.mtu = adapter->fallback.mtu; adapter->desired.rx_queues = adapter->fallback.rx_queues; adapter->desired.tx_queues = adapter->fallback.tx_queues; adapter->desired.rx_entries = adapter->fallback.rx_entries; adapter->desired.tx_entries = adapter->fallback.tx_entries; reinit_completion(&adapter->reset_done); adapter->wait_for_reset = true; rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); if (rc) { ret = rc; goto out; } rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); if (rc) { ret = -ENODEV; goto out; } } out: adapter->wait_for_reset = false; return ret; } static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); adapter->desired.mtu = new_mtu + ETH_HLEN; return wait_for_reset(adapter); } static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, struct net_device *dev, netdev_features_t features) { /* Some backing hardware adapters can not * handle packets with a MSS less than 224 * or with only one segment. */ if (skb_is_gso(skb)) { if (skb_shinfo(skb)->gso_size < 224 || skb_shinfo(skb)->gso_segs == 1) features &= ~NETIF_F_GSO_MASK; } return features; } static const struct net_device_ops ibmvnic_netdev_ops = { .ndo_open = ibmvnic_open, .ndo_stop = ibmvnic_close, .ndo_start_xmit = ibmvnic_xmit, .ndo_set_rx_mode = ibmvnic_set_multi, .ndo_set_mac_address = ibmvnic_set_mac, .ndo_validate_addr = eth_validate_addr, .ndo_tx_timeout = ibmvnic_tx_timeout, .ndo_change_mtu = ibmvnic_change_mtu, .ndo_features_check = ibmvnic_features_check, }; /* ethtool functions */ static int ibmvnic_get_link_ksettings(struct net_device *netdev, struct ethtool_link_ksettings *cmd) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); int rc; rc = send_query_phys_parms(adapter); if (rc) { adapter->speed = SPEED_UNKNOWN; adapter->duplex = DUPLEX_UNKNOWN; } cmd->base.speed = adapter->speed; cmd->base.duplex = adapter->duplex; cmd->base.port = PORT_FIBRE; cmd->base.phy_address = 0; cmd->base.autoneg = AUTONEG_ENABLE; return 0; } static void ibmvnic_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); strscpy(info->fw_version, adapter->fw_version, sizeof(info->fw_version)); } static u32 ibmvnic_get_msglevel(struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); return adapter->msg_enable; } static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); adapter->msg_enable = data; } static u32 ibmvnic_get_link(struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); /* Don't need to send a query because we request a logical link up at * init and then we wait for link state indications */ return adapter->logical_link_state; } static void ibmvnic_get_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring, struct kernel_ethtool_ringparam *kernel_ring, struct netlink_ext_ack *extack) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; ring->rx_mini_max_pending = 0; ring->rx_jumbo_max_pending = 0; ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; ring->tx_pending = adapter->req_tx_entries_per_subcrq; ring->rx_mini_pending = 0; ring->rx_jumbo_pending = 0; } static int ibmvnic_set_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring, struct kernel_ethtool_ringparam *kernel_ring, struct netlink_ext_ack *extack) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq || ring->tx_pending > adapter->max_tx_entries_per_subcrq) { netdev_err(netdev, "Invalid request.\n"); netdev_err(netdev, "Max tx buffers = %llu\n", adapter->max_rx_add_entries_per_subcrq); netdev_err(netdev, "Max rx buffers = %llu\n", adapter->max_tx_entries_per_subcrq); return -EINVAL; } adapter->desired.rx_entries = ring->rx_pending; adapter->desired.tx_entries = ring->tx_pending; return wait_for_reset(adapter); } static void ibmvnic_get_channels(struct net_device *netdev, struct ethtool_channels *channels) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); channels->max_rx = adapter->max_rx_queues; channels->max_tx = adapter->max_tx_queues; channels->max_other = 0; channels->max_combined = 0; channels->rx_count = adapter->req_rx_queues; channels->tx_count = adapter->req_tx_queues; channels->other_count = 0; channels->combined_count = 0; } static int ibmvnic_set_channels(struct net_device *netdev, struct ethtool_channels *channels) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); adapter->desired.rx_queues = channels->rx_count; adapter->desired.tx_queues = channels->tx_count; return wait_for_reset(adapter); } static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) { struct ibmvnic_adapter *adapter = netdev_priv(dev); int i; if (stringset != ETH_SS_STATS) return; for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); for (i = 0; i < adapter->req_tx_queues; i++) { snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); data += ETH_GSTRING_LEN; snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); data += ETH_GSTRING_LEN; snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i); data += ETH_GSTRING_LEN; } for (i = 0; i < adapter->req_rx_queues; i++) { snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); data += ETH_GSTRING_LEN; snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); data += ETH_GSTRING_LEN; snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); data += ETH_GSTRING_LEN; } } static int ibmvnic_get_sset_count(struct net_device *dev, int sset) { struct ibmvnic_adapter *adapter = netdev_priv(dev); switch (sset) { case ETH_SS_STATS: return ARRAY_SIZE(ibmvnic_stats) + adapter->req_tx_queues * NUM_TX_STATS + adapter->req_rx_queues * NUM_RX_STATS; default: return -EOPNOTSUPP; } } static void ibmvnic_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data) { struct ibmvnic_adapter *adapter = netdev_priv(dev); union ibmvnic_crq crq; int i, j; int rc; memset(&crq, 0, sizeof(crq)); crq.request_statistics.first = IBMVNIC_CRQ_CMD; crq.request_statistics.cmd = REQUEST_STATISTICS; crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); crq.request_statistics.len = cpu_to_be32(sizeof(struct ibmvnic_statistics)); /* Wait for data to be written */ reinit_completion(&adapter->stats_done); rc = ibmvnic_send_crq(adapter, &crq); if (rc) return; rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); if (rc) return; for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) data[i] = be64_to_cpu(IBMVNIC_GET_STAT (adapter, ibmvnic_stats[i].offset)); for (j = 0; j < adapter->req_tx_queues; j++) { data[i] = adapter->tx_stats_buffers[j].packets; i++; data[i] = adapter->tx_stats_buffers[j].bytes; i++; data[i] = adapter->tx_stats_buffers[j].dropped_packets; i++; } for (j = 0; j < adapter->req_rx_queues; j++) { data[i] = adapter->rx_stats_buffers[j].packets; i++; data[i] = adapter->rx_stats_buffers[j].bytes; i++; data[i] = adapter->rx_stats_buffers[j].interrupts; i++; } } static const struct ethtool_ops ibmvnic_ethtool_ops = { .get_drvinfo = ibmvnic_get_drvinfo, .get_msglevel = ibmvnic_get_msglevel, .set_msglevel = ibmvnic_set_msglevel, .get_link = ibmvnic_get_link, .get_ringparam = ibmvnic_get_ringparam, .set_ringparam = ibmvnic_set_ringparam, .get_channels = ibmvnic_get_channels, .set_channels = ibmvnic_set_channels, .get_strings = ibmvnic_get_strings, .get_sset_count = ibmvnic_get_sset_count, .get_ethtool_stats = ibmvnic_get_ethtool_stats, .get_link_ksettings = ibmvnic_get_link_ksettings, }; /* Routines for managing CRQs/sCRQs */ static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, struct ibmvnic_sub_crq_queue *scrq) { int rc; if (!scrq) { netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); return -EINVAL; } if (scrq->irq) { free_irq(scrq->irq, scrq); irq_dispose_mapping(scrq->irq); scrq->irq = 0; } if (scrq->msgs) { memset(scrq->msgs, 0, 4 * PAGE_SIZE); atomic_set(&scrq->used, 0); scrq->cur = 0; scrq->ind_buf.index = 0; } else { netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); return -EINVAL; } rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); return rc; } static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) { int i, rc; if (!adapter->tx_scrq || !adapter->rx_scrq) return -EINVAL; ibmvnic_clean_affinity(adapter); for (i = 0; i < adapter->req_tx_queues; i++) { netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); if (rc) return rc; } for (i = 0; i < adapter->req_rx_queues; i++) { netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); if (rc) return rc; } return rc; } static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, struct ibmvnic_sub_crq_queue *scrq, bool do_h_free) { struct device *dev = &adapter->vdev->dev; long rc; netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); if (do_h_free) { /* Close the sub-crqs */ do { rc = plpar_hcall_norets(H_FREE_SUB_CRQ, adapter->vdev->unit_address, scrq->crq_num); } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); if (rc) { netdev_err(adapter->netdev, "Failed to release sub-CRQ %16lx, rc = %ld\n", scrq->crq_num, rc); } } dma_free_coherent(dev, IBMVNIC_IND_ARR_SZ, scrq->ind_buf.indir_arr, scrq->ind_buf.indir_dma); dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, DMA_BIDIRECTIONAL); free_pages((unsigned long)scrq->msgs, 2); free_cpumask_var(scrq->affinity_mask); kfree(scrq); } static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter *adapter) { struct device *dev = &adapter->vdev->dev; struct ibmvnic_sub_crq_queue *scrq; int rc; scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); if (!scrq) return NULL; scrq->msgs = (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); if (!scrq->msgs) { dev_warn(dev, "Couldn't allocate crq queue messages page\n"); goto zero_page_failed; } if (!zalloc_cpumask_var(&scrq->affinity_mask, GFP_KERNEL)) goto cpumask_alloc_failed; scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, DMA_BIDIRECTIONAL); if (dma_mapping_error(dev, scrq->msg_token)) { dev_warn(dev, "Couldn't map crq queue messages page\n"); goto map_failed; } rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); if (rc == H_RESOURCE) rc = ibmvnic_reset_crq(adapter); if (rc == H_CLOSED) { dev_warn(dev, "Partner adapter not ready, waiting.\n"); } else if (rc) { dev_warn(dev, "Error %d registering sub-crq\n", rc); goto reg_failed; } scrq->adapter = adapter; scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); scrq->ind_buf.index = 0; scrq->ind_buf.indir_arr = dma_alloc_coherent(dev, IBMVNIC_IND_ARR_SZ, &scrq->ind_buf.indir_dma, GFP_KERNEL); if (!scrq->ind_buf.indir_arr) goto indir_failed; spin_lock_init(&scrq->lock); netdev_dbg(adapter->netdev, "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", scrq->crq_num, scrq->hw_irq, scrq->irq); return scrq; indir_failed: do { rc = plpar_hcall_norets(H_FREE_SUB_CRQ, adapter->vdev->unit_address, scrq->crq_num); } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); reg_failed: dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, DMA_BIDIRECTIONAL); map_failed: free_cpumask_var(scrq->affinity_mask); cpumask_alloc_failed: free_pages((unsigned long)scrq->msgs, 2); zero_page_failed: kfree(scrq); return NULL; } static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) { int i; ibmvnic_clean_affinity(adapter); if (adapter->tx_scrq) { for (i = 0; i < adapter->num_active_tx_scrqs; i++) { if (!adapter->tx_scrq[i]) continue; netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", i); ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]); if (adapter->tx_scrq[i]->irq) { free_irq(adapter->tx_scrq[i]->irq, adapter->tx_scrq[i]); irq_dispose_mapping(adapter->tx_scrq[i]->irq); adapter->tx_scrq[i]->irq = 0; } release_sub_crq_queue(adapter, adapter->tx_scrq[i], do_h_free); } kfree(adapter->tx_scrq); adapter->tx_scrq = NULL; adapter->num_active_tx_scrqs = 0; } if (adapter->rx_scrq) { for (i = 0; i < adapter->num_active_rx_scrqs; i++) { if (!adapter->rx_scrq[i]) continue; netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", i); if (adapter->rx_scrq[i]->irq) { free_irq(adapter->rx_scrq[i]->irq, adapter->rx_scrq[i]); irq_dispose_mapping(adapter->rx_scrq[i]->irq); adapter->rx_scrq[i]->irq = 0; } release_sub_crq_queue(adapter, adapter->rx_scrq[i], do_h_free); } kfree(adapter->rx_scrq); adapter->rx_scrq = NULL; adapter->num_active_rx_scrqs = 0; } } static int disable_scrq_irq(struct ibmvnic_adapter *adapter, struct ibmvnic_sub_crq_queue *scrq) { struct device *dev = &adapter->vdev->dev; unsigned long rc; rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); if (rc) dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", scrq->hw_irq, rc); return rc; } /* We can not use the IRQ chip EOI handler because that has the * unintended effect of changing the interrupt priority. */ static void ibmvnic_xics_eoi(struct device *dev, struct ibmvnic_sub_crq_queue *scrq) { u64 val = 0xff000000 | scrq->hw_irq; unsigned long rc; rc = plpar_hcall_norets(H_EOI, val); if (rc) dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", val, rc); } /* Due to a firmware bug, the hypervisor can send an interrupt to a * transmit or receive queue just prior to a partition migration. * Force an EOI after migration. */ static void ibmvnic_clear_pending_interrupt(struct device *dev, struct ibmvnic_sub_crq_queue *scrq) { if (!xive_enabled()) ibmvnic_xics_eoi(dev, scrq); } static int enable_scrq_irq(struct ibmvnic_adapter *adapter, struct ibmvnic_sub_crq_queue *scrq) { struct device *dev = &adapter->vdev->dev; unsigned long rc; if (scrq->hw_irq > 0x100000000ULL) { dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); return 1; } if (test_bit(0, &adapter->resetting) && adapter->reset_reason == VNIC_RESET_MOBILITY) { ibmvnic_clear_pending_interrupt(dev, scrq); } rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); if (rc) dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", scrq->hw_irq, rc); return rc; } static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, struct ibmvnic_sub_crq_queue *scrq) { struct device *dev = &adapter->vdev->dev; struct ibmvnic_tx_pool *tx_pool; struct ibmvnic_tx_buff *txbuff; struct netdev_queue *txq; union sub_crq *next; int index; int i; restart_loop: while (pending_scrq(adapter, scrq)) { unsigned int pool = scrq->pool_index; int num_entries = 0; int total_bytes = 0; int num_packets = 0; next = ibmvnic_next_scrq(adapter, scrq); for (i = 0; i < next->tx_comp.num_comps; i++) { index = be32_to_cpu(next->tx_comp.correlators[i]); if (index & IBMVNIC_TSO_POOL_MASK) { tx_pool = &adapter->tso_pool[pool]; index &= ~IBMVNIC_TSO_POOL_MASK; } else { tx_pool = &adapter->tx_pool[pool]; } txbuff = &tx_pool->tx_buff[index]; num_packets++; num_entries += txbuff->num_entries; if (txbuff->skb) { total_bytes += txbuff->skb->len; if (next->tx_comp.rcs[i]) { dev_err(dev, "tx error %x\n", next->tx_comp.rcs[i]); dev_kfree_skb_irq(txbuff->skb); } else { dev_consume_skb_irq(txbuff->skb); } txbuff->skb = NULL; } else { netdev_warn(adapter->netdev, "TX completion received with NULL socket buffer\n"); } tx_pool->free_map[tx_pool->producer_index] = index; tx_pool->producer_index = (tx_pool->producer_index + 1) % tx_pool->num_buffers; } /* remove tx_comp scrq*/ next->tx_comp.first = 0; txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); netdev_tx_completed_queue(txq, num_packets, total_bytes); if (atomic_sub_return(num_entries, &scrq->used) <= (adapter->req_tx_entries_per_subcrq / 2) && __netif_subqueue_stopped(adapter->netdev, scrq->pool_index)) { rcu_read_lock(); if (adapter->tx_queues_active) { netif_wake_subqueue(adapter->netdev, scrq->pool_index); netdev_dbg(adapter->netdev, "Started queue %d\n", scrq->pool_index); } rcu_read_unlock(); } } enable_scrq_irq(adapter, scrq); if (pending_scrq(adapter, scrq)) { disable_scrq_irq(adapter, scrq); goto restart_loop; } return 0; } static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) { struct ibmvnic_sub_crq_queue *scrq = instance; struct ibmvnic_adapter *adapter = scrq->adapter; disable_scrq_irq(adapter, scrq); ibmvnic_complete_tx(adapter, scrq); return IRQ_HANDLED; } static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) { struct ibmvnic_sub_crq_queue *scrq = instance; struct ibmvnic_adapter *adapter = scrq->adapter; /* When booting a kdump kernel we can hit pending interrupts * prior to completing driver initialization. */ if (unlikely(adapter->state != VNIC_OPEN)) return IRQ_NONE; adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { disable_scrq_irq(adapter, scrq); __napi_schedule(&adapter->napi[scrq->scrq_num]); } return IRQ_HANDLED; } static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) { struct device *dev = &adapter->vdev->dev; struct ibmvnic_sub_crq_queue *scrq; int i = 0, j = 0; int rc = 0; for (i = 0; i < adapter->req_tx_queues; i++) { netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", i); scrq = adapter->tx_scrq[i]; scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); if (!scrq->irq) { rc = -EINVAL; dev_err(dev, "Error mapping irq\n"); goto req_tx_irq_failed; } snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", adapter->vdev->unit_address, i); rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 0, scrq->name, scrq); if (rc) { dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", scrq->irq, rc); irq_dispose_mapping(scrq->irq); goto req_tx_irq_failed; } } for (i = 0; i < adapter->req_rx_queues; i++) { netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", i); scrq = adapter->rx_scrq[i]; scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); if (!scrq->irq) { rc = -EINVAL; dev_err(dev, "Error mapping irq\n"); goto req_rx_irq_failed; } snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", adapter->vdev->unit_address, i); rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 0, scrq->name, scrq); if (rc) { dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", scrq->irq, rc); irq_dispose_mapping(scrq->irq); goto req_rx_irq_failed; } } cpus_read_lock(); ibmvnic_set_affinity(adapter); cpus_read_unlock(); return rc; req_rx_irq_failed: for (j = 0; j < i; j++) { free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); irq_dispose_mapping(adapter->rx_scrq[j]->irq); } i = adapter->req_tx_queues; req_tx_irq_failed: for (j = 0; j < i; j++) { free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); irq_dispose_mapping(adapter->tx_scrq[j]->irq); } release_sub_crqs(adapter, 1); return rc; } static int init_sub_crqs(struct ibmvnic_adapter *adapter) { struct device *dev = &adapter->vdev->dev; struct ibmvnic_sub_crq_queue **allqueues; int registered_queues = 0; int total_queues; int more = 0; int i; total_queues = adapter->req_tx_queues + adapter->req_rx_queues; allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); if (!allqueues) return -ENOMEM; for (i = 0; i < total_queues; i++) { allqueues[i] = init_sub_crq_queue(adapter); if (!allqueues[i]) { dev_warn(dev, "Couldn't allocate all sub-crqs\n"); break; } registered_queues++; } /* Make sure we were able to register the minimum number of queues */ if (registered_queues < adapter->min_tx_queues + adapter->min_rx_queues) { dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); goto tx_failed; } /* Distribute the failed allocated queues*/ for (i = 0; i < total_queues - registered_queues + more ; i++) { netdev_dbg(adapter->netdev, "Reducing number of queues\n"); switch (i % 3) { case 0: if (adapter->req_rx_queues > adapter->min_rx_queues) adapter->req_rx_queues--; else more++; break; case 1: if (adapter->req_tx_queues > adapter->min_tx_queues) adapter->req_tx_queues--; else more++; break; } } adapter->tx_scrq = kcalloc(adapter->req_tx_queues, sizeof(*adapter->tx_scrq), GFP_KERNEL); if (!adapter->tx_scrq) goto tx_failed; for (i = 0; i < adapter->req_tx_queues; i++) { adapter->tx_scrq[i] = allqueues[i]; adapter->tx_scrq[i]->pool_index = i; adapter->num_active_tx_scrqs++; } adapter->rx_scrq = kcalloc(adapter->req_rx_queues, sizeof(*adapter->rx_scrq), GFP_KERNEL); if (!adapter->rx_scrq) goto rx_failed; for (i = 0; i < adapter->req_rx_queues; i++) { adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; adapter->rx_scrq[i]->scrq_num = i; adapter->num_active_rx_scrqs++; } kfree(allqueues); return 0; rx_failed: kfree(adapter->tx_scrq); adapter->tx_scrq = NULL; tx_failed: for (i = 0; i < registered_queues; i++) release_sub_crq_queue(adapter, allqueues[i], 1); kfree(allqueues); return -ENOMEM; } static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) { struct device *dev = &adapter->vdev->dev; union ibmvnic_crq crq; int max_entries; int cap_reqs; /* We send out 6 or 7 REQUEST_CAPABILITY CRQs below (depending on * the PROMISC flag). Initialize this count upfront. When the tasklet * receives a response to all of these, it will send the next protocol * message (QUERY_IP_OFFLOAD). */ if (!(adapter->netdev->flags & IFF_PROMISC) || adapter->promisc_supported) cap_reqs = 7; else cap_reqs = 6; if (!retry) { /* Sub-CRQ entries are 32 byte long */ int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); atomic_set(&adapter->running_cap_crqs, cap_reqs); if (adapter->min_tx_entries_per_subcrq > entries_page || adapter->min_rx_add_entries_per_subcrq > entries_page) { dev_err(dev, "Fatal, invalid entries per sub-crq\n"); return; } if (adapter->desired.mtu) adapter->req_mtu = adapter->desired.mtu; else adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; if (!adapter->desired.tx_entries) adapter->desired.tx_entries = adapter->max_tx_entries_per_subcrq; if (!adapter->desired.rx_entries) adapter->desired.rx_entries = adapter->max_rx_add_entries_per_subcrq; max_entries = IBMVNIC_LTB_SET_SIZE / (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * adapter->desired.tx_entries > IBMVNIC_LTB_SET_SIZE) { adapter->desired.tx_entries = max_entries; } if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * adapter->desired.rx_entries > IBMVNIC_LTB_SET_SIZE) { adapter->desired.rx_entries = max_entries; } if (adapter->desired.tx_entries) adapter->req_tx_entries_per_subcrq = adapter->desired.tx_entries; else adapter->req_tx_entries_per_subcrq = adapter->max_tx_entries_per_subcrq; if (adapter->desired.rx_entries) adapter->req_rx_add_entries_per_subcrq = adapter->desired.rx_entries; else adapter->req_rx_add_entries_per_subcrq = adapter->max_rx_add_entries_per_subcrq; if (adapter->desired.tx_queues) adapter->req_tx_queues = adapter->desired.tx_queues; else adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues; if (adapter->desired.rx_queues) adapter->req_rx_queues = adapter->desired.rx_queues; else adapter->req_rx_queues = adapter->opt_rx_comp_queues; adapter->req_rx_add_queues = adapter->max_rx_add_queues; } else { atomic_add(cap_reqs, &adapter->running_cap_crqs); } memset(&crq, 0, sizeof(crq)); crq.request_capability.first = IBMVNIC_CRQ_CMD; crq.request_capability.cmd = REQUEST_CAPABILITY; crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); cap_reqs--; ibmvnic_send_crq(adapter, &crq); crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); cap_reqs--; ibmvnic_send_crq(adapter, &crq); crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); cap_reqs--; ibmvnic_send_crq(adapter, &crq); crq.request_capability.capability = cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); crq.request_capability.number = cpu_to_be64(adapter->req_tx_entries_per_subcrq); cap_reqs--; ibmvnic_send_crq(adapter, &crq); crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); cap_reqs--; ibmvnic_send_crq(adapter, &crq); crq.request_capability.capability = cpu_to_be16(REQ_MTU); crq.request_capability.number = cpu_to_be64(adapter->req_mtu); cap_reqs--; ibmvnic_send_crq(adapter, &crq); if (adapter->netdev->flags & IFF_PROMISC) { if (adapter->promisc_supported) { crq.request_capability.capability = cpu_to_be16(PROMISC_REQUESTED); crq.request_capability.number = cpu_to_be64(1); cap_reqs--; ibmvnic_send_crq(adapter, &crq); } } else { crq.request_capability.capability = cpu_to_be16(PROMISC_REQUESTED); crq.request_capability.number = cpu_to_be64(0); cap_reqs--; ibmvnic_send_crq(adapter, &crq); } /* Keep at end to catch any discrepancy between expected and actual * CRQs sent. */ WARN_ON(cap_reqs != 0); } static int pending_scrq(struct ibmvnic_adapter *adapter, struct ibmvnic_sub_crq_queue *scrq) { union sub_crq *entry = &scrq->msgs[scrq->cur]; int rc; rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); /* Ensure that the SCRQ valid flag is loaded prior to loading the * contents of the SCRQ descriptor */ dma_rmb(); return rc; } static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, struct ibmvnic_sub_crq_queue *scrq) { union sub_crq *entry; unsigned long flags; spin_lock_irqsave(&scrq->lock, flags); entry = &scrq->msgs[scrq->cur]; if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { if (++scrq->cur == scrq->size) scrq->cur = 0; } else { entry = NULL; } spin_unlock_irqrestore(&scrq->lock, flags); /* Ensure that the SCRQ valid flag is loaded prior to loading the * contents of the SCRQ descriptor */ dma_rmb(); return entry; } static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) { struct ibmvnic_crq_queue *queue = &adapter->crq; union ibmvnic_crq *crq; crq = &queue->msgs[queue->cur]; if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { if (++queue->cur == queue->size) queue->cur = 0; } else { crq = NULL; } return crq; } static void print_subcrq_error(struct device *dev, int rc, const char *func) { switch (rc) { case H_PARAMETER: dev_warn_ratelimited(dev, "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", func, rc); break; case H_CLOSED: dev_warn_ratelimited(dev, "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", func, rc); break; default: dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); break; } } static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, u64 remote_handle, u64 ioba, u64 num_entries) { unsigned int ua = adapter->vdev->unit_address; struct device *dev = &adapter->vdev->dev; int rc; /* Make sure the hypervisor sees the complete request */ dma_wmb(); rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, cpu_to_be64(remote_handle), ioba, num_entries); if (rc) print_subcrq_error(dev, rc, __func__); return rc; } static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, union ibmvnic_crq *crq) { unsigned int ua = adapter->vdev->unit_address; struct device *dev = &adapter->vdev->dev; u64 *u64_crq = (u64 *)crq; int rc; netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", (unsigned long)cpu_to_be64(u64_crq[0]), (unsigned long)cpu_to_be64(u64_crq[1])); if (!adapter->crq.active && crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); return -EINVAL; } /* Make sure the hypervisor sees the complete request */ dma_wmb(); rc = plpar_hcall_norets(H_SEND_CRQ, ua, cpu_to_be64(u64_crq[0]), cpu_to_be64(u64_crq[1])); if (rc) { if (rc == H_CLOSED) { dev_warn(dev, "CRQ Queue closed\n"); /* do not reset, report the fail, wait for passive init from server */ } dev_warn(dev, "Send error (rc=%d)\n", rc); } return rc; } static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) { struct device *dev = &adapter->vdev->dev; union ibmvnic_crq crq; int retries = 100; int rc; memset(&crq, 0, sizeof(crq)); crq.generic.first = IBMVNIC_CRQ_INIT_CMD; crq.generic.cmd = IBMVNIC_CRQ_INIT; netdev_dbg(adapter->netdev, "Sending CRQ init\n"); do { rc = ibmvnic_send_crq(adapter, &crq); if (rc != H_CLOSED) break; retries--; msleep(50); } while (retries > 0); if (rc) { dev_err(dev, "Failed to send init request, rc = %d\n", rc); return rc; } return 0; } struct vnic_login_client_data { u8 type; __be16 len; char name[]; } __packed; static int vnic_client_data_len(struct ibmvnic_adapter *adapter) { int len; /* Calculate the amount of buffer space needed for the * vnic client data in the login buffer. There are four entries, * OS name, LPAR name, device name, and a null last entry. */ len = 4 * sizeof(struct vnic_login_client_data); len += 6; /* "Linux" plus NULL */ len += strlen(utsname()->nodename) + 1; len += strlen(adapter->netdev->name) + 1; return len; } static void vnic_add_client_data(struct ibmvnic_adapter *adapter, struct vnic_login_client_data *vlcd) { const char *os_name = "Linux"; int len; /* Type 1 - LPAR OS */ vlcd->type = 1; len = strlen(os_name) + 1; vlcd->len = cpu_to_be16(len); strscpy(vlcd->name, os_name, len); vlcd = (struct vnic_login_client_data *)(vlcd->name + len); /* Type 2 - LPAR name */ vlcd->type = 2; len = strlen(utsname()->nodename) + 1; vlcd->len = cpu_to_be16(len); strscpy(vlcd->name, utsname()->nodename, len); vlcd = (struct vnic_login_client_data *)(vlcd->name + len); /* Type 3 - device name */ vlcd->type = 3; len = strlen(adapter->netdev->name) + 1; vlcd->len = cpu_to_be16(len); strscpy(vlcd->name, adapter->netdev->name, len); } static int send_login(struct ibmvnic_adapter *adapter) { struct ibmvnic_login_rsp_buffer *login_rsp_buffer; struct ibmvnic_login_buffer *login_buffer; struct device *dev = &adapter->vdev->dev; struct vnic_login_client_data *vlcd; dma_addr_t rsp_buffer_token; dma_addr_t buffer_token; size_t rsp_buffer_size; union ibmvnic_crq crq; int client_data_len; size_t buffer_size; __be64 *tx_list_p; __be64 *rx_list_p; int rc; int i; if (!adapter->tx_scrq || !adapter->rx_scrq) { netdev_err(adapter->netdev, "RX or TX queues are not allocated, device login failed\n"); return -ENOMEM; } release_login_buffer(adapter); release_login_rsp_buffer(adapter); client_data_len = vnic_client_data_len(adapter); buffer_size = sizeof(struct ibmvnic_login_buffer) + sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + client_data_len; login_buffer = kzalloc(buffer_size, GFP_ATOMIC); if (!login_buffer) goto buf_alloc_failed; buffer_token = dma_map_single(dev, login_buffer, buffer_size, DMA_TO_DEVICE); if (dma_mapping_error(dev, buffer_token)) { dev_err(dev, "Couldn't map login buffer\n"); goto buf_map_failed; } rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + sizeof(u64) * adapter->req_tx_queues + sizeof(u64) * adapter->req_rx_queues + sizeof(u64) * adapter->req_rx_queues + sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); if (!login_rsp_buffer) goto buf_rsp_alloc_failed; rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, rsp_buffer_size, DMA_FROM_DEVICE); if (dma_mapping_error(dev, rsp_buffer_token)) { dev_err(dev, "Couldn't map login rsp buffer\n"); goto buf_rsp_map_failed; } adapter->login_buf = login_buffer; adapter->login_buf_token = buffer_token; adapter->login_buf_sz = buffer_size; adapter->login_rsp_buf = login_rsp_buffer; adapter->login_rsp_buf_token = rsp_buffer_token; adapter->login_rsp_buf_sz = rsp_buffer_size; login_buffer->len = cpu_to_be32(buffer_size); login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); login_buffer->off_txcomp_subcrqs = cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); login_buffer->off_rxcomp_subcrqs = cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + sizeof(u64) * adapter->req_tx_queues); login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); tx_list_p = (__be64 *)((char *)login_buffer + sizeof(struct ibmvnic_login_buffer)); rx_list_p = (__be64 *)((char *)login_buffer + sizeof(struct ibmvnic_login_buffer) + sizeof(u64) * adapter->req_tx_queues); for (i = 0; i < adapter->req_tx_queues; i++) { if (adapter->tx_scrq[i]) { tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->crq_num); } } for (i = 0; i < adapter->req_rx_queues; i++) { if (adapter->rx_scrq[i]) { rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->crq_num); } } /* Insert vNIC login client data */ vlcd = (struct vnic_login_client_data *) ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); login_buffer->client_data_offset = cpu_to_be32((char *)vlcd - (char *)login_buffer); login_buffer->client_data_len = cpu_to_be32(client_data_len); vnic_add_client_data(adapter, vlcd); netdev_dbg(adapter->netdev, "Login Buffer:\n"); for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { netdev_dbg(adapter->netdev, "%016lx\n", ((unsigned long *)(adapter->login_buf))[i]); } memset(&crq, 0, sizeof(crq)); crq.login.first = IBMVNIC_CRQ_CMD; crq.login.cmd = LOGIN; crq.login.ioba = cpu_to_be32(buffer_token); crq.login.len = cpu_to_be32(buffer_size); adapter->login_pending = true; rc = ibmvnic_send_crq(adapter, &crq); if (rc) { adapter->login_pending = false; netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); goto buf_rsp_map_failed; } return 0; buf_rsp_map_failed: kfree(login_rsp_buffer); adapter->login_rsp_buf = NULL; buf_rsp_alloc_failed: dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); buf_map_failed: kfree(login_buffer); adapter->login_buf = NULL; buf_alloc_failed: return -ENOMEM; } static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, u32 len, u8 map_id) { union ibmvnic_crq crq; memset(&crq, 0, sizeof(crq)); crq.request_map.first = IBMVNIC_CRQ_CMD; crq.request_map.cmd = REQUEST_MAP; crq.request_map.map_id = map_id; crq.request_map.ioba = cpu_to_be32(addr); crq.request_map.len = cpu_to_be32(len); return ibmvnic_send_crq(adapter, &crq); } static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) { union ibmvnic_crq crq; memset(&crq, 0, sizeof(crq)); crq.request_unmap.first = IBMVNIC_CRQ_CMD; crq.request_unmap.cmd = REQUEST_UNMAP; crq.request_unmap.map_id = map_id; return ibmvnic_send_crq(adapter, &crq); } static void send_query_map(struct ibmvnic_adapter *adapter) { union ibmvnic_crq crq; memset(&crq, 0, sizeof(crq)); crq.query_map.first = IBMVNIC_CRQ_CMD; crq.query_map.cmd = QUERY_MAP; ibmvnic_send_crq(adapter, &crq); } /* Send a series of CRQs requesting various capabilities of the VNIC server */ static void send_query_cap(struct ibmvnic_adapter *adapter) { union ibmvnic_crq crq; int cap_reqs; /* We send out 25 QUERY_CAPABILITY CRQs below. Initialize this count * upfront. When the tasklet receives a response to all of these, it * can send out the next protocol messaage (REQUEST_CAPABILITY). */ cap_reqs = 25; atomic_set(&adapter->running_cap_crqs, cap_reqs); memset(&crq, 0, sizeof(crq)); crq.query_capability.first = IBMVNIC_CRQ_CMD; crq.query_capability.cmd = QUERY_CAPABILITY; crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(MIN_MTU); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(MAX_MTU); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); ibmvnic_send_crq(adapter, &crq); cap_reqs--; crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); ibmvnic_send_crq(adapter, &crq); cap_reqs--; /* Keep at end to catch any discrepancy between expected and actual * CRQs sent. */ WARN_ON(cap_reqs != 0); } static void send_query_ip_offload(struct ibmvnic_adapter *adapter) { int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); struct device *dev = &adapter->vdev->dev; union ibmvnic_crq crq; adapter->ip_offload_tok = dma_map_single(dev, &adapter->ip_offload_buf, buf_sz, DMA_FROM_DEVICE); if (dma_mapping_error(dev, adapter->ip_offload_tok)) { if (!firmware_has_feature(FW_FEATURE_CMO)) dev_err(dev, "Couldn't map offload buffer\n"); return; } memset(&crq, 0, sizeof(crq)); crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; crq.query_ip_offload.len = cpu_to_be32(buf_sz); crq.query_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_tok); ibmvnic_send_crq(adapter, &crq); } static void send_control_ip_offload(struct ibmvnic_adapter *adapter) { struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; struct device *dev = &adapter->vdev->dev; netdev_features_t old_hw_features = 0; union ibmvnic_crq crq; adapter->ip_offload_ctrl_tok = dma_map_single(dev, ctrl_buf, sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { dev_err(dev, "Couldn't map ip offload control buffer\n"); return; } ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); ctrl_buf->ipv4_chksum = buf->ipv4_chksum; ctrl_buf->ipv6_chksum = buf->ipv6_chksum; ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; /* large_rx disabled for now, additional features needed */ ctrl_buf->large_rx_ipv4 = 0; ctrl_buf->large_rx_ipv6 = 0; if (adapter->state != VNIC_PROBING) { old_hw_features = adapter->netdev->hw_features; adapter->netdev->hw_features = 0; } adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) adapter->netdev->hw_features |= NETIF_F_IP_CSUM; if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; if ((adapter->netdev->features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) adapter->netdev->hw_features |= NETIF_F_RXCSUM; if (buf->large_tx_ipv4) adapter->netdev->hw_features |= NETIF_F_TSO; if (buf->large_tx_ipv6) adapter->netdev->hw_features |= NETIF_F_TSO6; if (adapter->state == VNIC_PROBING) { adapter->netdev->features |= adapter->netdev->hw_features; } else if (old_hw_features != adapter->netdev->hw_features) { netdev_features_t tmp = 0; /* disable features no longer supported */ adapter->netdev->features &= adapter->netdev->hw_features; /* turn on features now supported if previously enabled */ tmp = (old_hw_features ^ adapter->netdev->hw_features) & adapter->netdev->hw_features; adapter->netdev->features |= tmp & adapter->netdev->wanted_features; } memset(&crq, 0, sizeof(crq)); crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; crq.control_ip_offload.len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); ibmvnic_send_crq(adapter, &crq); } static void handle_vpd_size_rsp(union ibmvnic_crq *crq, struct ibmvnic_adapter *adapter) { struct device *dev = &adapter->vdev->dev; if (crq->get_vpd_size_rsp.rc.code) { dev_err(dev, "Error retrieving VPD size, rc=%x\n", crq->get_vpd_size_rsp.rc.code); complete(&adapter->fw_done); return; } adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); complete(&adapter->fw_done); } static void handle_vpd_rsp(union ibmvnic_crq *crq, struct ibmvnic_adapter *adapter) { struct device *dev = &adapter->vdev->dev; unsigned char *substr = NULL; u8 fw_level_len = 0; memset(adapter->fw_version, 0, 32); dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, DMA_FROM_DEVICE); if (crq->get_vpd_rsp.rc.code) { dev_err(dev, "Error retrieving VPD from device, rc=%x\n", crq->get_vpd_rsp.rc.code); goto complete; } /* get the position of the firmware version info * located after the ASCII 'RM' substring in the buffer */ substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); if (!substr) { dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); goto complete; } /* get length of firmware level ASCII substring */ if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { fw_level_len = *(substr + 2); } else { dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); goto complete; } /* copy firmware version string from vpd into adapter */ if ((substr + 3 + fw_level_len) < (adapter->vpd->buff + adapter->vpd->len)) { strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); } else { dev_info(dev, "FW substr extrapolated VPD buff\n"); } complete: if (adapter->fw_version[0] == '\0') strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version)); complete(&adapter->fw_done); } static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) { struct device *dev = &adapter->vdev->dev; struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; int i; dma_unmap_single(dev, adapter->ip_offload_tok, sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) netdev_dbg(adapter->netdev, "%016lx\n", ((unsigned long *)(buf))[i]); netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", buf->tcp_ipv4_chksum); netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", buf->tcp_ipv6_chksum); netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", buf->udp_ipv4_chksum); netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", buf->udp_ipv6_chksum); netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", buf->large_tx_ipv4); netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", buf->large_tx_ipv6); netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", buf->large_rx_ipv4); netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", buf->large_rx_ipv6); netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", buf->max_ipv4_header_size); netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", buf->max_ipv6_header_size); netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", buf->max_tcp_header_size); netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", buf->max_udp_header_size); netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", buf->max_large_tx_size); netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", buf->max_large_rx_size); netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", buf->ipv6_extension_header); netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", buf->tcp_pseudosum_req); netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", buf->num_ipv6_ext_headers); netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", buf->off_ipv6_ext_headers); send_control_ip_offload(adapter); } static const char *ibmvnic_fw_err_cause(u16 cause) { switch (cause) { case ADAPTER_PROBLEM: return "adapter problem"; case BUS_PROBLEM: return "bus problem"; case FW_PROBLEM: return "firmware problem"; case DD_PROBLEM: return "device driver problem"; case EEH_RECOVERY: return "EEH recovery"; case FW_UPDATED: return "firmware updated"; case LOW_MEMORY: return "low Memory"; default: return "unknown"; } } static void handle_error_indication(union ibmvnic_crq *crq, struct ibmvnic_adapter *adapter) { struct device *dev = &adapter->vdev->dev; u16 cause; cause = be16_to_cpu(crq->error_indication.error_cause); dev_warn_ratelimited(dev, "Firmware reports %serror, cause: %s. Starting recovery...\n", crq->error_indication.flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "", ibmvnic_fw_err_cause(cause)); if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) ibmvnic_reset(adapter, VNIC_RESET_FATAL); else ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); } static int handle_change_mac_rsp(union ibmvnic_crq *crq, struct ibmvnic_adapter *adapter) { struct net_device *netdev = adapter->netdev; struct device *dev = &adapter->vdev->dev; long rc; rc = crq->change_mac_addr_rsp.rc.code; if (rc) { dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); goto out; } /* crq->change_mac_addr.mac_addr is the requested one * crq->change_mac_addr_rsp.mac_addr is the returned valid one. */ eth_hw_addr_set(netdev, &crq->change_mac_addr_rsp.mac_addr[0]); ether_addr_copy(adapter->mac_addr, &crq->change_mac_addr_rsp.mac_addr[0]); out: complete(&adapter->fw_done); return rc; } static void handle_request_cap_rsp(union ibmvnic_crq *crq, struct ibmvnic_adapter *adapter) { struct device *dev = &adapter->vdev->dev; u64 *req_value; char *name; atomic_dec(&adapter->running_cap_crqs); netdev_dbg(adapter->netdev, "Outstanding request-caps: %d\n", atomic_read(&adapter->running_cap_crqs)); switch (be16_to_cpu(crq->request_capability_rsp.capability)) { case REQ_TX_QUEUES: req_value = &adapter->req_tx_queues; name = "tx"; break; case REQ_RX_QUEUES: req_value = &adapter->req_rx_queues; name = "rx"; break; case REQ_RX_ADD_QUEUES: req_value = &adapter->req_rx_add_queues; name = "rx_add"; break; case REQ_TX_ENTRIES_PER_SUBCRQ: req_value = &adapter->req_tx_entries_per_subcrq; name = "tx_entries_per_subcrq"; break; case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: req_value = &adapter->req_rx_add_entries_per_subcrq; name = "rx_add_entries_per_subcrq"; break; case REQ_MTU: req_value = &adapter->req_mtu; name = "mtu"; break; case PROMISC_REQUESTED: req_value = &adapter->promisc; name = "promisc"; break; default: dev_err(dev, "Got invalid cap request rsp %d\n", crq->request_capability.capability); return; } switch (crq->request_capability_rsp.rc.code) { case SUCCESS: break; case PARTIALSUCCESS: dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", *req_value, (long)be64_to_cpu(crq->request_capability_rsp.number), name); if (be16_to_cpu(crq->request_capability_rsp.capability) == REQ_MTU) { pr_err("mtu of %llu is not supported. Reverting.\n", *req_value); *req_value = adapter->fallback.mtu; } else { *req_value = be64_to_cpu(crq->request_capability_rsp.number); } send_request_cap(adapter, 1); return; default: dev_err(dev, "Error %d in request cap rsp\n", crq->request_capability_rsp.rc.code); return; } /* Done receiving requested capabilities, query IP offload support */ if (atomic_read(&adapter->running_cap_crqs) == 0) send_query_ip_offload(adapter); } static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, struct ibmvnic_adapter *adapter) { struct device *dev = &adapter->vdev->dev; struct net_device *netdev = adapter->netdev; struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; struct ibmvnic_login_buffer *login = adapter->login_buf; u64 *tx_handle_array; u64 *rx_handle_array; int num_tx_pools; int num_rx_pools; u64 *size_array; int i; /* CHECK: Test/set of login_pending does not need to be atomic * because only ibmvnic_tasklet tests/clears this. */ if (!adapter->login_pending) { netdev_warn(netdev, "Ignoring unexpected login response\n"); return 0; } adapter->login_pending = false; dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, DMA_TO_DEVICE); dma_unmap_single(dev, adapter->login_rsp_buf_token, adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); /* If the number of queues requested can't be allocated by the * server, the login response will return with code 1. We will need * to resend the login buffer with fewer queues requested. */ if (login_rsp_crq->generic.rc.code) { adapter->init_done_rc = login_rsp_crq->generic.rc.code; complete(&adapter->init_done); return 0; } if (adapter->failover_pending) { adapter->init_done_rc = -EAGAIN; netdev_dbg(netdev, "Failover pending, ignoring login response\n"); complete(&adapter->init_done); /* login response buffer will be released on reset */ return 0; } netdev->mtu = adapter->req_mtu - ETH_HLEN; netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { netdev_dbg(adapter->netdev, "%016lx\n", ((unsigned long *)(adapter->login_rsp_buf))[i]); } /* Sanity checks */ if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || (be32_to_cpu(login->num_rxcomp_subcrqs) * adapter->req_rx_add_queues != be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); ibmvnic_reset(adapter, VNIC_RESET_FATAL); return -EIO; } size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); /* variable buffer sizes are not supported, so just read the * first entry. */ adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); for (i = 0; i < num_tx_pools; i++) adapter->tx_scrq[i]->handle = tx_handle_array[i]; for (i = 0; i < num_rx_pools; i++) adapter->rx_scrq[i]->handle = rx_handle_array[i]; adapter->num_active_tx_scrqs = num_tx_pools; adapter->num_active_rx_scrqs = num_rx_pools; release_login_rsp_buffer(adapter); release_login_buffer(adapter); complete(&adapter->init_done); return 0; } static void handle_request_unmap_rsp(union ibmvnic_crq *crq, struct ibmvnic_adapter *adapter) { struct device *dev = &adapter->vdev->dev; long rc; rc = crq->request_unmap_rsp.rc.code; if (rc) dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); } static void handle_query_map_rsp(union ibmvnic_crq *crq, struct ibmvnic_adapter *adapter) { struct net_device *netdev = adapter->netdev; struct device *dev = &adapter->vdev->dev; long rc; rc = crq->query_map_rsp.rc.code; if (rc) { dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); return; } netdev_dbg(netdev, "page_size = %d\ntot_pages = %u\nfree_pages = %u\n", crq->query_map_rsp.page_size, __be32_to_cpu(crq->query_map_rsp.tot_pages), __be32_to_cpu(crq->query_map_rsp.free_pages)); } static void handle_query_cap_rsp(union ibmvnic_crq *crq, struct ibmvnic_adapter *adapter) { struct net_device *netdev = adapter->netdev; struct device *dev = &adapter->vdev->dev; long rc; atomic_dec(&adapter->running_cap_crqs); netdev_dbg(netdev, "Outstanding queries: %d\n", atomic_read(&adapter->running_cap_crqs)); rc = crq->query_capability.rc.code; if (rc) { dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); goto out; } switch (be16_to_cpu(crq->query_capability.capability)) { case MIN_TX_QUEUES: adapter->min_tx_queues = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "min_tx_queues = %lld\n", adapter->min_tx_queues); break; case MIN_RX_QUEUES: adapter->min_rx_queues = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "min_rx_queues = %lld\n", adapter->min_rx_queues); break; case MIN_RX_ADD_QUEUES: adapter->min_rx_add_queues = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "min_rx_add_queues = %lld\n", adapter->min_rx_add_queues); break; case MAX_TX_QUEUES: adapter->max_tx_queues = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "max_tx_queues = %lld\n", adapter->max_tx_queues); break; case MAX_RX_QUEUES: adapter->max_rx_queues = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "max_rx_queues = %lld\n", adapter->max_rx_queues); break; case MAX_RX_ADD_QUEUES: adapter->max_rx_add_queues = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "max_rx_add_queues = %lld\n", adapter->max_rx_add_queues); break; case MIN_TX_ENTRIES_PER_SUBCRQ: adapter->min_tx_entries_per_subcrq = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", adapter->min_tx_entries_per_subcrq); break; case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: adapter->min_rx_add_entries_per_subcrq = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", adapter->min_rx_add_entries_per_subcrq); break; case MAX_TX_ENTRIES_PER_SUBCRQ: adapter->max_tx_entries_per_subcrq = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", adapter->max_tx_entries_per_subcrq); break; case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: adapter->max_rx_add_entries_per_subcrq = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", adapter->max_rx_add_entries_per_subcrq); break; case TCP_IP_OFFLOAD: adapter->tcp_ip_offload = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "tcp_ip_offload = %lld\n", adapter->tcp_ip_offload); break; case PROMISC_SUPPORTED: adapter->promisc_supported = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "promisc_supported = %lld\n", adapter->promisc_supported); break; case MIN_MTU: adapter->min_mtu = be64_to_cpu(crq->query_capability.number); netdev->min_mtu = adapter->min_mtu - ETH_HLEN; netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); break; case MAX_MTU: adapter->max_mtu = be64_to_cpu(crq->query_capability.number); netdev->max_mtu = adapter->max_mtu - ETH_HLEN; netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); break; case MAX_MULTICAST_FILTERS: adapter->max_multicast_filters = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "max_multicast_filters = %lld\n", adapter->max_multicast_filters); break; case VLAN_HEADER_INSERTION: adapter->vlan_header_insertion = be64_to_cpu(crq->query_capability.number); if (adapter->vlan_header_insertion) netdev->features |= NETIF_F_HW_VLAN_STAG_TX; netdev_dbg(netdev, "vlan_header_insertion = %lld\n", adapter->vlan_header_insertion); break; case RX_VLAN_HEADER_INSERTION: adapter->rx_vlan_header_insertion = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", adapter->rx_vlan_header_insertion); break; case MAX_TX_SG_ENTRIES: adapter->max_tx_sg_entries = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", adapter->max_tx_sg_entries); break; case RX_SG_SUPPORTED: adapter->rx_sg_supported = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "rx_sg_supported = %lld\n", adapter->rx_sg_supported); break; case OPT_TX_COMP_SUB_QUEUES: adapter->opt_tx_comp_sub_queues = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", adapter->opt_tx_comp_sub_queues); break; case OPT_RX_COMP_QUEUES: adapter->opt_rx_comp_queues = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", adapter->opt_rx_comp_queues); break; case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: adapter->opt_rx_bufadd_q_per_rx_comp_q = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", adapter->opt_rx_bufadd_q_per_rx_comp_q); break; case OPT_TX_ENTRIES_PER_SUBCRQ: adapter->opt_tx_entries_per_subcrq = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", adapter->opt_tx_entries_per_subcrq); break; case OPT_RXBA_ENTRIES_PER_SUBCRQ: adapter->opt_rxba_entries_per_subcrq = be64_to_cpu(crq->query_capability.number); netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", adapter->opt_rxba_entries_per_subcrq); break; case TX_RX_DESC_REQ: adapter->tx_rx_desc_req = crq->query_capability.number; netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", adapter->tx_rx_desc_req); break; default: netdev_err(netdev, "Got invalid cap rsp %d\n", crq->query_capability.capability); } out: if (atomic_read(&adapter->running_cap_crqs) == 0) send_request_cap(adapter, 0); } static int send_query_phys_parms(struct ibmvnic_adapter *adapter) { union ibmvnic_crq crq; int rc; memset(&crq, 0, sizeof(crq)); crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; mutex_lock(&adapter->fw_lock); adapter->fw_done_rc = 0; reinit_completion(&adapter->fw_done); rc = ibmvnic_send_crq(adapter, &crq); if (rc) { mutex_unlock(&adapter->fw_lock); return rc; } rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); if (rc) { mutex_unlock(&adapter->fw_lock); return rc; } mutex_unlock(&adapter->fw_lock); return adapter->fw_done_rc ? -EIO : 0; } static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, struct ibmvnic_adapter *adapter) { struct net_device *netdev = adapter->netdev; int rc; __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); rc = crq->query_phys_parms_rsp.rc.code; if (rc) { netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); return rc; } switch (rspeed) { case IBMVNIC_10MBPS: adapter->speed = SPEED_10; break; case IBMVNIC_100MBPS: adapter->speed = SPEED_100; break; case IBMVNIC_1GBPS: adapter->speed = SPEED_1000; break; case IBMVNIC_10GBPS: adapter->speed = SPEED_10000; break; case IBMVNIC_25GBPS: adapter->speed = SPEED_25000; break; case IBMVNIC_40GBPS: adapter->speed = SPEED_40000; break; case IBMVNIC_50GBPS: adapter->speed = SPEED_50000; break; case IBMVNIC_100GBPS: adapter->speed = SPEED_100000; break; case IBMVNIC_200GBPS: adapter->speed = SPEED_200000; break; default: if (netif_carrier_ok(netdev)) netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); adapter->speed = SPEED_UNKNOWN; } if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) adapter->duplex = DUPLEX_FULL; else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) adapter->duplex = DUPLEX_HALF; else adapter->duplex = DUPLEX_UNKNOWN; return rc; } static void ibmvnic_handle_crq(union ibmvnic_crq *crq, struct ibmvnic_adapter *adapter) { struct ibmvnic_generic_crq *gen_crq = &crq->generic; struct net_device *netdev = adapter->netdev; struct device *dev = &adapter->vdev->dev; u64 *u64_crq = (u64 *)crq; long rc; netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", (unsigned long)cpu_to_be64(u64_crq[0]), (unsigned long)cpu_to_be64(u64_crq[1])); switch (gen_crq->first) { case IBMVNIC_CRQ_INIT_RSP: switch (gen_crq->cmd) { case IBMVNIC_CRQ_INIT: dev_info(dev, "Partner initialized\n"); adapter->from_passive_init = true; /* Discard any stale login responses from prev reset. * CHECK: should we clear even on INIT_COMPLETE? */ adapter->login_pending = false; if (adapter->state == VNIC_DOWN) rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT); else rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); if (rc && rc != -EBUSY) { /* We were unable to schedule the failover * reset either because the adapter was still * probing (eg: during kexec) or we could not * allocate memory. Clear the failover_pending * flag since no one else will. We ignore * EBUSY because it means either FAILOVER reset * is already scheduled or the adapter is * being removed. */ netdev_err(netdev, "Error %ld scheduling failover reset\n", rc); adapter->failover_pending = false; } if (!completion_done(&adapter->init_done)) { if (!adapter->init_done_rc) adapter->init_done_rc = -EAGAIN; complete(&adapter->init_done); } break; case IBMVNIC_CRQ_INIT_COMPLETE: dev_info(dev, "Partner initialization complete\n"); adapter->crq.active = true; send_version_xchg(adapter); break; default: dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); } return; case IBMVNIC_CRQ_XPORT_EVENT: netif_carrier_off(netdev); adapter->crq.active = false; /* terminate any thread waiting for a response * from the device */ if (!completion_done(&adapter->fw_done)) { adapter->fw_done_rc = -EIO; complete(&adapter->fw_done); } /* if we got here during crq-init, retry crq-init */ if (!completion_done(&adapter->init_done)) { adapter->init_done_rc = -EAGAIN; complete(&adapter->init_done); } if (!completion_done(&adapter->stats_done)) complete(&adapter->stats_done); if (test_bit(0, &adapter->resetting)) adapter->force_reset_recovery = true; if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { dev_info(dev, "Migrated, re-enabling adapter\n"); ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { dev_info(dev, "Backing device failover detected\n"); adapter->failover_pending = true; } else { /* The adapter lost the connection */ dev_err(dev, "Virtual Adapter failed (rc=%d)\n", gen_crq->cmd); ibmvnic_reset(adapter, VNIC_RESET_FATAL); } return; case IBMVNIC_CRQ_CMD_RSP: break; default: dev_err(dev, "Got an invalid msg type 0x%02x\n", gen_crq->first); return; } switch (gen_crq->cmd) { case VERSION_EXCHANGE_RSP: rc = crq->version_exchange_rsp.rc.code; if (rc) { dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); break; } ibmvnic_version = be16_to_cpu(crq->version_exchange_rsp.version); dev_info(dev, "Partner protocol version is %d\n", ibmvnic_version); send_query_cap(adapter); break; case QUERY_CAPABILITY_RSP: handle_query_cap_rsp(crq, adapter); break; case QUERY_MAP_RSP: handle_query_map_rsp(crq, adapter); break; case REQUEST_MAP_RSP: adapter->fw_done_rc = crq->request_map_rsp.rc.code; complete(&adapter->fw_done); break; case REQUEST_UNMAP_RSP: handle_request_unmap_rsp(crq, adapter); break; case REQUEST_CAPABILITY_RSP: handle_request_cap_rsp(crq, adapter); break; case LOGIN_RSP: netdev_dbg(netdev, "Got Login Response\n"); handle_login_rsp(crq, adapter); break; case LOGICAL_LINK_STATE_RSP: netdev_dbg(netdev, "Got Logical Link State Response, state: %d rc: %d\n", crq->logical_link_state_rsp.link_state, crq->logical_link_state_rsp.rc.code); adapter->logical_link_state = crq->logical_link_state_rsp.link_state; adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; complete(&adapter->init_done); break; case LINK_STATE_INDICATION: netdev_dbg(netdev, "Got Logical Link State Indication\n"); adapter->phys_link_state = crq->link_state_indication.phys_link_state; adapter->logical_link_state = crq->link_state_indication.logical_link_state; if (adapter->phys_link_state && adapter->logical_link_state) netif_carrier_on(netdev); else netif_carrier_off(netdev); break; case CHANGE_MAC_ADDR_RSP: netdev_dbg(netdev, "Got MAC address change Response\n"); adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); break; case ERROR_INDICATION: netdev_dbg(netdev, "Got Error Indication\n"); handle_error_indication(crq, adapter); break; case REQUEST_STATISTICS_RSP: netdev_dbg(netdev, "Got Statistics Response\n"); complete(&adapter->stats_done); break; case QUERY_IP_OFFLOAD_RSP: netdev_dbg(netdev, "Got Query IP offload Response\n"); handle_query_ip_offload_rsp(adapter); break; case MULTICAST_CTRL_RSP: netdev_dbg(netdev, "Got multicast control Response\n"); break; case CONTROL_IP_OFFLOAD_RSP: netdev_dbg(netdev, "Got Control IP offload Response\n"); dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); complete(&adapter->init_done); break; case COLLECT_FW_TRACE_RSP: netdev_dbg(netdev, "Got Collect firmware trace Response\n"); complete(&adapter->fw_done); break; case GET_VPD_SIZE_RSP: handle_vpd_size_rsp(crq, adapter); break; case GET_VPD_RSP: handle_vpd_rsp(crq, adapter); break; case QUERY_PHYS_PARMS_RSP: adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); complete(&adapter->fw_done); break; default: netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", gen_crq->cmd); } } static irqreturn_t ibmvnic_interrupt(int irq, void *instance) { struct ibmvnic_adapter *adapter = instance; tasklet_schedule(&adapter->tasklet); return IRQ_HANDLED; } static void ibmvnic_tasklet(struct tasklet_struct *t) { struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); struct ibmvnic_crq_queue *queue = &adapter->crq; union ibmvnic_crq *crq; unsigned long flags; spin_lock_irqsave(&queue->lock, flags); /* Pull all the valid messages off the CRQ */ while ((crq = ibmvnic_next_crq(adapter)) != NULL) { /* This barrier makes sure ibmvnic_next_crq()'s * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded * before ibmvnic_handle_crq()'s * switch(gen_crq->first) and switch(gen_crq->cmd). */ dma_rmb(); ibmvnic_handle_crq(crq, adapter); crq->generic.first = 0; } spin_unlock_irqrestore(&queue->lock, flags); } static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) { struct vio_dev *vdev = adapter->vdev; int rc; do { rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); if (rc) dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); return rc; } static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) { struct ibmvnic_crq_queue *crq = &adapter->crq; struct device *dev = &adapter->vdev->dev; struct vio_dev *vdev = adapter->vdev; int rc; /* Close the CRQ */ do { rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); /* Clean out the queue */ if (!crq->msgs) return -EINVAL; memset(crq->msgs, 0, PAGE_SIZE); crq->cur = 0; crq->active = false; /* And re-open it again */ rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, crq->msg_token, PAGE_SIZE); if (rc == H_CLOSED) /* Adapter is good, but other end is not ready */ dev_warn(dev, "Partner adapter not ready\n"); else if (rc != 0) dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); return rc; } static void release_crq_queue(struct ibmvnic_adapter *adapter) { struct ibmvnic_crq_queue *crq = &adapter->crq; struct vio_dev *vdev = adapter->vdev; long rc; if (!crq->msgs) return; netdev_dbg(adapter->netdev, "Releasing CRQ\n"); free_irq(vdev->irq, adapter); tasklet_kill(&adapter->tasklet); do { rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); free_page((unsigned long)crq->msgs); crq->msgs = NULL; crq->active = false; } static int init_crq_queue(struct ibmvnic_adapter *adapter) { struct ibmvnic_crq_queue *crq = &adapter->crq; struct device *dev = &adapter->vdev->dev; struct vio_dev *vdev = adapter->vdev; int rc, retrc = -ENOMEM; if (crq->msgs) return 0; crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); /* Should we allocate more than one page? */ if (!crq->msgs) return -ENOMEM; crq->size = PAGE_SIZE / sizeof(*crq->msgs); crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, DMA_BIDIRECTIONAL); if (dma_mapping_error(dev, crq->msg_token)) goto map_failed; rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, crq->msg_token, PAGE_SIZE); if (rc == H_RESOURCE) /* maybe kexecing and resource is busy. try a reset */ rc = ibmvnic_reset_crq(adapter); retrc = rc; if (rc == H_CLOSED) { dev_warn(dev, "Partner adapter not ready\n"); } else if (rc) { dev_warn(dev, "Error %d opening adapter\n", rc); goto reg_crq_failed; } retrc = 0; tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", adapter->vdev->unit_address); rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); if (rc) { dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); goto req_irq_failed; } rc = vio_enable_interrupts(vdev); if (rc) { dev_err(dev, "Error %d enabling interrupts\n", rc); goto req_irq_failed; } crq->cur = 0; spin_lock_init(&crq->lock); /* process any CRQs that were queued before we enabled interrupts */ tasklet_schedule(&adapter->tasklet); return retrc; req_irq_failed: tasklet_kill(&adapter->tasklet); do { rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); reg_crq_failed: dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); map_failed: free_page((unsigned long)crq->msgs); crq->msgs = NULL; return retrc; } static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) { struct device *dev = &adapter->vdev->dev; unsigned long timeout = msecs_to_jiffies(20000); u64 old_num_rx_queues = adapter->req_rx_queues; u64 old_num_tx_queues = adapter->req_tx_queues; int rc; adapter->from_passive_init = false; rc = ibmvnic_send_crq_init(adapter); if (rc) { dev_err(dev, "Send crq init failed with error %d\n", rc); return rc; } if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { dev_err(dev, "Initialization sequence timed out\n"); return -ETIMEDOUT; } if (adapter->init_done_rc) { release_crq_queue(adapter); dev_err(dev, "CRQ-init failed, %d\n", adapter->init_done_rc); return adapter->init_done_rc; } if (adapter->from_passive_init) { adapter->state = VNIC_OPEN; adapter->from_passive_init = false; dev_err(dev, "CRQ-init failed, passive-init\n"); return -EINVAL; } if (reset && test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && adapter->reset_reason != VNIC_RESET_MOBILITY) { if (adapter->req_rx_queues != old_num_rx_queues || adapter->req_tx_queues != old_num_tx_queues) { release_sub_crqs(adapter, 0); rc = init_sub_crqs(adapter); } else { /* no need to reinitialize completely, but we do * need to clean up transmits that were in flight * when we processed the reset. Failure to do so * will confound the upper layer, usually TCP, by * creating the illusion of transmits that are * awaiting completion. */ clean_tx_pools(adapter); rc = reset_sub_crq_queues(adapter); } } else { rc = init_sub_crqs(adapter); } if (rc) { dev_err(dev, "Initialization of sub crqs failed\n"); release_crq_queue(adapter); return rc; } rc = init_sub_crq_irqs(adapter); if (rc) { dev_err(dev, "Failed to initialize sub crq irqs\n"); release_crq_queue(adapter); } return rc; } static struct device_attribute dev_attr_failover; static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) { struct ibmvnic_adapter *adapter; struct net_device *netdev; unsigned char *mac_addr_p; unsigned long flags; bool init_success; int rc; dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", dev->unit_address); mac_addr_p = (unsigned char *)vio_get_attribute(dev, VETH_MAC_ADDR, NULL); if (!mac_addr_p) { dev_err(&dev->dev, "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", __FILE__, __LINE__); return 0; } netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), IBMVNIC_MAX_QUEUES); if (!netdev) return -ENOMEM; adapter = netdev_priv(netdev); adapter->state = VNIC_PROBING; dev_set_drvdata(&dev->dev, netdev); adapter->vdev = dev; adapter->netdev = netdev; adapter->login_pending = false; memset(&adapter->map_ids, 0, sizeof(adapter->map_ids)); /* map_ids start at 1, so ensure map_id 0 is always "in-use" */ bitmap_set(adapter->map_ids, 0, 1); ether_addr_copy(adapter->mac_addr, mac_addr_p); eth_hw_addr_set(netdev, adapter->mac_addr); netdev->irq = dev->irq; netdev->netdev_ops = &ibmvnic_netdev_ops; netdev->ethtool_ops = &ibmvnic_ethtool_ops; SET_NETDEV_DEV(netdev, &dev->dev); INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, __ibmvnic_delayed_reset); INIT_LIST_HEAD(&adapter->rwi_list); spin_lock_init(&adapter->rwi_lock); spin_lock_init(&adapter->state_lock); mutex_init(&adapter->fw_lock); init_completion(&adapter->probe_done); init_completion(&adapter->init_done); init_completion(&adapter->fw_done); init_completion(&adapter->reset_done); init_completion(&adapter->stats_done); clear_bit(0, &adapter->resetting); adapter->prev_rx_buf_sz = 0; adapter->prev_mtu = 0; init_success = false; do { reinit_init_done(adapter); /* clear any failovers we got in the previous pass * since we are reinitializing the CRQ */ adapter->failover_pending = false; /* If we had already initialized CRQ, we may have one or * more resets queued already. Discard those and release * the CRQ before initializing the CRQ again. */ release_crq_queue(adapter); /* Since we are still in PROBING state, __ibmvnic_reset() * will not access the ->rwi_list and since we released CRQ, * we won't get _new_ transport events. But there maybe an * ongoing ibmvnic_reset() call. So serialize access to * rwi_list. If we win the race, ibvmnic_reset() could add * a reset after we purged but thats ok - we just may end * up with an extra reset (i.e similar to having two or more * resets in the queue at once). * CHECK. */ spin_lock_irqsave(&adapter->rwi_lock, flags); flush_reset_queue(adapter); spin_unlock_irqrestore(&adapter->rwi_lock, flags); rc = init_crq_queue(adapter); if (rc) { dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc); goto ibmvnic_init_fail; } rc = ibmvnic_reset_init(adapter, false); } while (rc == -EAGAIN); /* We are ignoring the error from ibmvnic_reset_init() assuming that the * partner is not ready. CRQ is not active. When the partner becomes * ready, we will do the passive init reset. */ if (!rc) init_success = true; rc = init_stats_buffers(adapter); if (rc) goto ibmvnic_init_fail; rc = init_stats_token(adapter); if (rc) goto ibmvnic_stats_fail; rc = device_create_file(&dev->dev, &dev_attr_failover); if (rc) goto ibmvnic_dev_file_err; netif_carrier_off(netdev); if (init_success) { adapter->state = VNIC_PROBED; netdev->mtu = adapter->req_mtu - ETH_HLEN; netdev->min_mtu = adapter->min_mtu - ETH_HLEN; netdev->max_mtu = adapter->max_mtu - ETH_HLEN; } else { adapter->state = VNIC_DOWN; } adapter->wait_for_reset = false; adapter->last_reset_time = jiffies; rc = register_netdev(netdev); if (rc) { dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); goto ibmvnic_register_fail; } dev_info(&dev->dev, "ibmvnic registered\n"); rc = ibmvnic_cpu_notif_add(adapter); if (rc) { netdev_err(netdev, "Registering cpu notifier failed\n"); goto cpu_notif_add_failed; } complete(&adapter->probe_done); return 0; cpu_notif_add_failed: unregister_netdev(netdev); ibmvnic_register_fail: device_remove_file(&dev->dev, &dev_attr_failover); ibmvnic_dev_file_err: release_stats_token(adapter); ibmvnic_stats_fail: release_stats_buffers(adapter); ibmvnic_init_fail: release_sub_crqs(adapter, 1); release_crq_queue(adapter); /* cleanup worker thread after releasing CRQ so we don't get * transport events (i.e new work items for the worker thread). */ adapter->state = VNIC_REMOVING; complete(&adapter->probe_done); flush_work(&adapter->ibmvnic_reset); flush_delayed_work(&adapter->ibmvnic_delayed_reset); flush_reset_queue(adapter); mutex_destroy(&adapter->fw_lock); free_netdev(netdev); return rc; } static void ibmvnic_remove(struct vio_dev *dev) { struct net_device *netdev = dev_get_drvdata(&dev->dev); struct ibmvnic_adapter *adapter = netdev_priv(netdev); unsigned long flags; spin_lock_irqsave(&adapter->state_lock, flags); /* If ibmvnic_reset() is scheduling a reset, wait for it to * finish. Then, set the state to REMOVING to prevent it from * scheduling any more work and to have reset functions ignore * any resets that have already been scheduled. Drop the lock * after setting state, so __ibmvnic_reset() which is called * from the flush_work() below, can make progress. */ spin_lock(&adapter->rwi_lock); adapter->state = VNIC_REMOVING; spin_unlock(&adapter->rwi_lock); spin_unlock_irqrestore(&adapter->state_lock, flags); ibmvnic_cpu_notif_remove(adapter); flush_work(&adapter->ibmvnic_reset); flush_delayed_work(&adapter->ibmvnic_delayed_reset); rtnl_lock(); unregister_netdevice(netdev); release_resources(adapter); release_rx_pools(adapter); release_tx_pools(adapter); release_sub_crqs(adapter, 1); release_crq_queue(adapter); release_stats_token(adapter); release_stats_buffers(adapter); adapter->state = VNIC_REMOVED; rtnl_unlock(); mutex_destroy(&adapter->fw_lock); device_remove_file(&dev->dev, &dev_attr_failover); free_netdev(netdev); dev_set_drvdata(&dev->dev, NULL); } static ssize_t failover_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct net_device *netdev = dev_get_drvdata(dev); struct ibmvnic_adapter *adapter = netdev_priv(netdev); unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; __be64 session_token; long rc; if (!sysfs_streq(buf, "1")) return -EINVAL; rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, H_GET_SESSION_TOKEN, 0, 0, 0); if (rc) { netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", rc); goto last_resort; } session_token = (__be64)retbuf[0]; netdev_dbg(netdev, "Initiating client failover, session id %llx\n", be64_to_cpu(session_token)); rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, H_SESSION_ERR_DETECTED, session_token, 0, 0); if (rc) { netdev_err(netdev, "H_VIOCTL initiated failover failed, rc %ld\n", rc); goto last_resort; } return count; last_resort: netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n"); ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); return count; } static DEVICE_ATTR_WO(failover); static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) { struct net_device *netdev = dev_get_drvdata(&vdev->dev); struct ibmvnic_adapter *adapter; struct iommu_table *tbl; unsigned long ret = 0; int i; tbl = get_iommu_table_base(&vdev->dev); /* netdev inits at probe time along with the structures we need below*/ if (!netdev) return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); adapter = netdev_priv(netdev); ret += PAGE_SIZE; /* the crq message queue */ ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) ret += 4 * PAGE_SIZE; /* the scrq message queue */ for (i = 0; i < adapter->num_active_rx_pools; i++) ret += adapter->rx_pool[i].size * IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); return ret; } static int ibmvnic_resume(struct device *dev) { struct net_device *netdev = dev_get_drvdata(dev); struct ibmvnic_adapter *adapter = netdev_priv(netdev); if (adapter->state != VNIC_OPEN) return 0; tasklet_schedule(&adapter->tasklet); return 0; } static const struct vio_device_id ibmvnic_device_table[] = { {"network", "IBM,vnic"}, {"", "" } }; MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); static const struct dev_pm_ops ibmvnic_pm_ops = { .resume = ibmvnic_resume }; static struct vio_driver ibmvnic_driver = { .id_table = ibmvnic_device_table, .probe = ibmvnic_probe, .remove = ibmvnic_remove, .get_desired_dma = ibmvnic_get_desired_dma, .name = ibmvnic_driver_name, .pm = &ibmvnic_pm_ops, }; /* module functions */ static int __init ibmvnic_module_init(void) { int ret; ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, "net/ibmvnic:online", ibmvnic_cpu_online, ibmvnic_cpu_down_prep); if (ret < 0) goto out; ibmvnic_online = ret; ret = cpuhp_setup_state_multi(CPUHP_IBMVNIC_DEAD, "net/ibmvnic:dead", NULL, ibmvnic_cpu_dead); if (ret) goto err_dead; ret = vio_register_driver(&ibmvnic_driver); if (ret) goto err_vio_register; pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, IBMVNIC_DRIVER_VERSION); return 0; err_vio_register: cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD); err_dead: cpuhp_remove_multi_state(ibmvnic_online); out: return ret; } static void __exit ibmvnic_module_exit(void) { vio_unregister_driver(&ibmvnic_driver); cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD); cpuhp_remove_multi_state(ibmvnic_online); } module_init(ibmvnic_module_init); module_exit(ibmvnic_module_exit);
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