| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Thomas Falcon | 14349 | 57.26% | 95 | 50.53% |
| Nathan Fontenot | 7253 | 28.94% | 46 | 24.47% |
| John Allen | 2246 | 8.96% | 26 | 13.83% |
| Desnes Augusto Nunes do Rosario | 963 | 3.84% | 4 | 2.13% |
| Murilo Fossa Vicentini | 98 | 0.39% | 2 | 1.06% |
| Brian King | 46 | 0.18% | 2 | 1.06% |
| Philippe Reynes | 41 | 0.16% | 1 | 0.53% |
| Juliet Kim | 35 | 0.14% | 1 | 0.53% |
| Mick Tarsel | 10 | 0.04% | 1 | 0.53% |
| Michał Mirosław | 5 | 0.02% | 1 | 0.53% |
| Yue haibing | 3 | 0.01% | 1 | 0.53% |
| Eric Dumazet | 3 | 0.01% | 1 | 0.53% |
| Michael Ellerman | 2 | 0.01% | 1 | 0.53% |
| Dan Carpenter | 1 | 0.00% | 1 | 0.53% |
| Jarod Wilson | 1 | 0.00% | 1 | 0.53% |
| Joe Perches | 1 | 0.00% | 1 | 0.53% |
| Kees Cook | 1 | 0.00% | 1 | 0.53% |
| Wei Yongjun | 1 | 0.00% | 1 | 0.53% |
| Arvind Yadav | 1 | 0.00% | 1 | 0.53% |
| Total | 25060 | 188 |
/**************************************************************************/ /* */ /* 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 program is free software; you can redistribute it and/or modify */ /* it under the terms of the GNU General Public License as published by */ /* the Free Software Foundation; either version 2 of the License, or */ /* (at your option) any later version. */ /* */ /* This program is distributed in the hope that it will be useful, */ /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ /* GNU General Public License for more details. */ /* */ /* You should have received a copy of the GNU General Public License */ /* along with this program. */ /* */ /* 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/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/iommu.h> #include <linux/uaccess.h> #include <asm/firmware.h> #include <linux/workqueue.h> #include <linux/if_vlan.h> #include <linux/utsname.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 int ibmvnic_remove(struct vio_dev *); 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(struct ibmvnic_adapter *adapter, u64 remote_handle, union sub_crq *sub_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_map_query(struct ibmvnic_adapter *adapter); static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); static int send_request_unmap(struct ibmvnic_adapter *, u8); static int send_login(struct ibmvnic_adapter *adapter); static void send_cap_queries(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_init(struct ibmvnic_adapter *); static int ibmvnic_reset_init(struct ibmvnic_adapter *); static void release_crq_queue(struct ibmvnic_adapter *); static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p); static int init_crq_queue(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 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; } static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, struct ibmvnic_long_term_buff *ltb, int size) { struct device *dev = &adapter->vdev->dev; int rc; ltb->size = size; ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, GFP_KERNEL); if (!ltb->buff) { dev_err(dev, "Couldn't alloc long term buffer\n"); return -ENOMEM; } ltb->map_id = adapter->map_id; adapter->map_id++; init_completion(&adapter->fw_done); rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); if (rc) { dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); return rc; } wait_for_completion(&adapter->fw_done); if (adapter->fw_done_rc) { dev_err(dev, "Couldn't map long term buffer,rc = %d\n", adapter->fw_done_rc); dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); return -1; } return 0; } 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; if (adapter->reset_reason != VNIC_RESET_FAILOVER && adapter->reset_reason != VNIC_RESET_MOBILITY) send_request_unmap(adapter, ltb->map_id); dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); } static int reset_long_term_buff(struct ibmvnic_adapter *adapter, struct ibmvnic_long_term_buff *ltb) { int rc; memset(ltb->buff, 0, ltb->size); init_completion(&adapter->fw_done); rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); if (rc) return rc; wait_for_completion(&adapter->fw_done); if (adapter->fw_done_rc) { dev_info(&adapter->vdev->dev, "Reset failed, attempting to free and reallocate buffer\n"); free_long_term_buff(adapter, ltb); return alloc_long_term_buff(adapter, ltb, ltb->size); } return 0; } static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) { int i; for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 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); struct device *dev = &adapter->vdev->dev; int buffers_added = 0; unsigned long lpar_rc; union sub_crq sub_crq; struct sk_buff *skb; unsigned int offset; dma_addr_t dma_addr; unsigned char *dst; u64 *handle_array; int shift = 0; int index; int i; if (!pool->active) return; handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + be32_to_cpu(adapter->login_rsp_buf-> off_rxadd_subcrqs)); for (i = 0; i < count; ++i) { skb = alloc_skb(pool->buff_size, GFP_ATOMIC); if (!skb) { dev_err(dev, "Couldn't replenish rx buff\n"); adapter->replenish_no_mem++; break; } index = pool->free_map[pool->next_free]; if (pool->rx_buff[index].skb) dev_err(dev, "Inconsistent free_map!\n"); /* Copy the skb to the long term mapped DMA buffer */ offset = index * pool->buff_size; dst = pool->long_term_buff.buff + offset; memset(dst, 0, pool->buff_size); dma_addr = pool->long_term_buff.addr + offset; pool->rx_buff[index].data = dst; pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; pool->rx_buff[index].dma = dma_addr; pool->rx_buff[index].skb = skb; pool->rx_buff[index].pool_index = pool->index; pool->rx_buff[index].size = pool->buff_size; 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[index]); sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); sub_crq.rx_add.map_id = pool->long_term_buff.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); lpar_rc = send_subcrq(adapter, handle_array[pool->index], &sub_crq); if (lpar_rc != H_SUCCESS) goto failure; buffers_added++; adapter->replenish_add_buff_success++; pool->next_free = (pool->next_free + 1) % pool->size; } 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"); pool->free_map[pool->next_free] = index; pool->rx_buff[index].skb = NULL; dev_kfree_skb_any(skb); adapter->replenish_add_buff_failure++; atomic_add(buffers_added, &pool->available); 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 < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); i++) { if (adapter->rx_pool[i].active) replenish_rx_pool(adapter, &adapter->rx_pool[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; stok = dma_map_single(dev, &adapter->stats, sizeof(struct ibmvnic_statistics), DMA_FROM_DEVICE); if (dma_mapping_error(dev, stok)) { dev_err(dev, "Couldn't map stats buffer\n"); return -1; } adapter->stats_token = stok; netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); return 0; } static int reset_rx_pools(struct ibmvnic_adapter *adapter) { struct ibmvnic_rx_pool *rx_pool; int rx_scrqs; int i, j, rc; u64 *size_array; size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); for (i = 0; i < rx_scrqs; i++) { rx_pool = &adapter->rx_pool[i]; netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); if (rx_pool->buff_size != be64_to_cpu(size_array[i])) { free_long_term_buff(adapter, &rx_pool->long_term_buff); rx_pool->buff_size = be64_to_cpu(size_array[i]); alloc_long_term_buff(adapter, &rx_pool->long_term_buff, rx_pool->size * rx_pool->buff_size); } else { rc = reset_long_term_buff(adapter, &rx_pool->long_term_buff); } if (rc) return rc; for (j = 0; j < rx_pool->size; j++) rx_pool->free_map[j] = j; memset(rx_pool->rx_buff, 0, rx_pool->size * sizeof(struct ibmvnic_rx_buff)); atomic_set(&rx_pool->available, 0); rx_pool->next_alloc = 0; rx_pool->next_free = 0; rx_pool->active = 1; } return 0; } 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_long_term_buff(adapter, &rx_pool->long_term_buff); 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; } 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; int rxadd_subcrqs; u64 *size_array; int i, j; rxadd_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); adapter->rx_pool = kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL); if (!adapter->rx_pool) { dev_err(dev, "Failed to allocate rx pools\n"); return -1; } adapter->num_active_rx_pools = rxadd_subcrqs; for (i = 0; i < rxadd_subcrqs; i++) { rx_pool = &adapter->rx_pool[i]; netdev_dbg(adapter->netdev, "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", i, adapter->req_rx_add_entries_per_subcrq, be64_to_cpu(size_array[i])); rx_pool->size = adapter->req_rx_add_entries_per_subcrq; rx_pool->index = i; rx_pool->buff_size = be64_to_cpu(size_array[i]); rx_pool->active = 1; rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), GFP_KERNEL); if (!rx_pool->free_map) { release_rx_pools(adapter); return -1; } 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"); release_rx_pools(adapter); return -1; } if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, rx_pool->size * rx_pool->buff_size)) { release_rx_pools(adapter); return -1; } for (j = 0; j < rx_pool->size; ++j) rx_pool->free_map[j] = j; atomic_set(&rx_pool->available, 0); rx_pool->next_alloc = 0; rx_pool->next_free = 0; } return 0; } static int reset_one_tx_pool(struct ibmvnic_adapter *adapter, struct ibmvnic_tx_pool *tx_pool) { int rc, i; rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); if (rc) return rc; memset(tx_pool->tx_buff, 0, tx_pool->num_buffers * sizeof(struct ibmvnic_tx_buff)); for (i = 0; i < tx_pool->num_buffers; i++) tx_pool->free_map[i] = i; tx_pool->consumer_index = 0; tx_pool->producer_index = 0; return 0; } static int reset_tx_pools(struct ibmvnic_adapter *adapter) { int tx_scrqs; int i, rc; tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); for (i = 0; i < tx_scrqs; i++) { rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]); if (rc) return rc; rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]); if (rc) return rc; } return 0; } 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_long_term_buff(adapter, &tx_pool->long_term_buff); } static void release_tx_pools(struct ibmvnic_adapter *adapter) { int i; 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; } static int init_one_tx_pool(struct net_device *netdev, struct ibmvnic_tx_pool *tx_pool, int num_entries, int buf_size) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); int i; tx_pool->tx_buff = kcalloc(num_entries, sizeof(struct ibmvnic_tx_buff), GFP_KERNEL); if (!tx_pool->tx_buff) return -1; if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, num_entries * buf_size)) return -1; tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); if (!tx_pool->free_map) return -1; for (i = 0; i < num_entries; i++) tx_pool->free_map[i] = i; tx_pool->consumer_index = 0; tx_pool->producer_index = 0; tx_pool->num_buffers = num_entries; tx_pool->buf_size = buf_size; return 0; } static int init_tx_pools(struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); int tx_subcrqs; int i, rc; tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); adapter->tx_pool = kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); if (!adapter->tx_pool) return -1; adapter->tso_pool = kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); if (!adapter->tso_pool) return -1; adapter->num_active_tx_pools = tx_subcrqs; for (i = 0; i < tx_subcrqs; i++) { rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], adapter->req_tx_entries_per_subcrq, adapter->req_mtu + VLAN_HLEN); if (rc) { release_tx_pools(adapter); return rc; } init_one_tx_pool(netdev, &adapter->tso_pool[i], IBMVNIC_TSO_BUFS, IBMVNIC_TSO_BUF_SZ); if (rc) { release_tx_pools(adapter); return rc; } } return 0; } 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, NAPI_POLL_WEIGHT); } 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++) { if (&adapter->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 int ibmvnic_login(struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); unsigned long timeout = msecs_to_jiffies(30000); int retry_count = 0; bool retry; int rc; do { retry = false; if (retry_count > IBMVNIC_MAX_QUEUES) { netdev_warn(netdev, "Login attempts exceeded\n"); return -1; } adapter->init_done_rc = 0; reinit_completion(&adapter->init_done); rc = send_login(adapter); if (rc) { netdev_warn(netdev, "Unable to login\n"); return rc; } if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { netdev_warn(netdev, "Login timed out\n"); return -1; } 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_cap_queries(adapter); if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { netdev_warn(netdev, "Capabilities query timed out\n"); return -1; } rc = init_sub_crqs(adapter); if (rc) { netdev_warn(netdev, "SCRQ initialization failed\n"); return -1; } rc = init_sub_crq_irqs(adapter); if (rc) { netdev_warn(netdev, "SCRQ irq initialization failed\n"); return -1; } } else if (adapter->init_done_rc) { netdev_warn(netdev, "Adapter login failed\n"); return -1; } } while (retry); /* handle pending MAC address changes after successful login */ if (adapter->mac_change_pending) { __ibmvnic_set_mac(netdev, &adapter->desired.mac); adapter->mac_change_pending = false; } 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_tx_pools(adapter); release_rx_pools(adapter); release_napi(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(30000); 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 -1; } if (adapter->init_done_rc == 1) { /* 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; init_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) return rc; wait_for_completion(&adapter->fw_done); 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; } 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; return rc; } wait_for_completion(&adapter->fw_done); 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; } adapter->map_id = 1; rc = init_napi(adapter); if (rc) return rc; send_map_query(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]); } rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); if (rc) { for (i = 0; i < adapter->req_rx_queues; i++) napi_disable(&adapter->napi[i]); release_resources(adapter); return rc; } 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; /* 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_OPEN; return 0; } if (adapter->state != VNIC_CLOSED) { rc = ibmvnic_login(netdev); if (rc) return rc; rc = init_resources(adapter); if (rc) { netdev_err(netdev, "failed to initialize resources\n"); release_resources(adapter); return rc; } } rc = __ibmvnic_open(netdev); netif_carrier_on(netdev); 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 */ if (adapter->resetting) netif_tx_disable(netdev); else netif_tx_stop_all_queues(netdev); ibmvnic_napi_disable(adapter); ibmvnic_disable_irqs(adapter); clean_rx_pools(adapter); clean_tx_pools(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); if (rc) return rc; adapter->state = VNIC_CLOSED; return 0; } static int ibmvnic_close(struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); int rc; /* 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); 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 * @tot_len - total length of data * * 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 * @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 - socket buffer * @num_entries - number of descriptors to be sent * @subcrq - first TX descriptor * @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 ibmvnic_tx_buff *txbuff, int *num_entries, u8 hdr_field) { int hdr_len[3] = {0, 0, 0}; int tot_len; u8 *hdr_data = txbuff->hdr_data; tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, txbuff->hdr_data); *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, txbuff->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 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_tx_buff *tx_buff = NULL; struct ibmvnic_sub_crq_queue *tx_scrq; struct ibmvnic_tx_pool *tx_pool; unsigned int tx_send_failed = 0; unsigned int tx_map_failed = 0; 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; u64 *handle_array; int index = 0; u8 proto = 0; netdev_tx_t ret = NETDEV_TX_OK; if (adapter->resetting) { if (!netif_subqueue_stopped(netdev, skb)) netif_stop_subqueue(netdev, queue_num); dev_kfree_skb_any(skb); tx_send_failed++; tx_dropped++; ret = NETDEV_TX_OK; goto out; } if (ibmvnic_xmit_workarounds(skb, netdev)) { tx_dropped++; tx_send_failed++; ret = NETDEV_TX_OK; goto out; } if (skb_is_gso(skb)) tx_pool = &adapter->tso_pool[queue_num]; else tx_pool = &adapter->tx_pool[queue_num]; tx_scrq = adapter->tx_scrq[queue_num]; txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); index = tx_pool->free_map[tx_pool->consumer_index]; if (index == IBMVNIC_INVALID_MAP) { dev_kfree_skb_any(skb); tx_send_failed++; tx_dropped++; ret = NETDEV_TX_OK; goto out; } tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; offset = index * tx_pool->buf_size; dst = tx_pool->long_term_buff.buff + offset; memset(dst, 0, tx_pool->buf_size); data_dma_addr = tx_pool->long_term_buff.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, page_address(skb_frag_page(frag)) + frag->page_offset, skb_frag_size(frag)); cur += skb_frag_size(frag); } } else { skb_copy_from_linear_data(skb, dst, skb->len); } tx_pool->consumer_index = (tx_pool->consumer_index + 1) % tx_pool->num_buffers; tx_buff = &tx_pool->tx_buff[index]; tx_buff->skb = skb; tx_buff->data_dma[0] = data_dma_addr; tx_buff->data_len[0] = skb->len; tx_buff->index = index; tx_buff->pool_index = queue_num; tx_buff->last_frag = true; 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(index | IBMVNIC_TSO_POOL_MASK); else tx_crq.v1.correlator = cpu_to_be32(index); tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.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; } /* determine if l2/3/4 headers are sent to firmware */ if ((*hdrs >> 7) & 1) { build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); tx_crq.v1.n_crq_elem = num_entries; tx_buff->num_entries = num_entries; tx_buff->indir_arr[0] = tx_crq; tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, sizeof(tx_buff->indir_arr), DMA_TO_DEVICE); if (dma_mapping_error(dev, tx_buff->indir_dma)) { dev_kfree_skb_any(skb); tx_buff->skb = NULL; if (!firmware_has_feature(FW_FEATURE_CMO)) dev_err(dev, "tx: unable to map descriptor array\n"); tx_map_failed++; tx_dropped++; ret = NETDEV_TX_OK; goto tx_err_out; } lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], (u64)tx_buff->indir_dma, (u64)num_entries); } else { tx_buff->num_entries = num_entries; lpar_rc = send_subcrq(adapter, handle_array[queue_num], &tx_crq); } if (lpar_rc != H_SUCCESS) { if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) dev_err_ratelimited(dev, "tx: send failed\n"); dev_kfree_skb_any(skb); tx_buff->skb = NULL; 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); } tx_send_failed++; tx_dropped++; ret = NETDEV_TX_OK; goto tx_err_out; } 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_start = jiffies; ret = NETDEV_TX_OK; goto out; tx_err_out: /* roll back consumer index and map array*/ if (tx_pool->consumer_index == 0) tx_pool->consumer_index = tx_pool->num_buffers - 1; else tx_pool->consumer_index--; tx_pool->free_map[tx_pool->consumer_index] = index; out: 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, struct sockaddr *p) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); struct sockaddr *addr = p; union ibmvnic_crq crq; int rc; if (!is_valid_ether_addr(addr->sa_data)) return -EADDRNOTAVAIL; 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], addr->sa_data); init_completion(&adapter->fw_done); rc = ibmvnic_send_crq(adapter, &crq); if (rc) return rc; wait_for_completion(&adapter->fw_done); /* netdev->dev_addr is changed in handle_change_mac_rsp function */ return adapter->fw_done_rc ? -EIO : 0; } static int ibmvnic_set_mac(struct net_device *netdev, void *p) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); struct sockaddr *addr = p; int rc; if (adapter->state == VNIC_PROBED) { memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr)); adapter->mac_change_pending = true; return 0; } rc = __ibmvnic_set_mac(netdev, addr); return rc; } /** * 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) { u64 old_num_rx_queues, old_num_tx_queues; u64 old_num_rx_slots, old_num_tx_slots; struct net_device *netdev = adapter->netdev; int i, rc; netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", rwi->reset_reason); netif_carrier_off(netdev); adapter->reset_reason = rwi->reset_reason; 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 (adapter->reset_reason != VNIC_RESET_MOBILITY && adapter->reset_reason != VNIC_RESET_FAILOVER) { rc = __ibmvnic_close(netdev); if (rc) return rc; } if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || adapter->wait_for_reset) { 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; if (adapter->wait_for_reset) { 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) rc = vio_enable_interrupts(adapter->vdev); } if (rc) { netdev_err(adapter->netdev, "Couldn't initialize crq. rc=%d\n", rc); return rc; } rc = ibmvnic_reset_init(adapter); if (rc) return IBMVNIC_INIT_FAILED; /* If the adapter was in PROBE state prior to the reset, * exit here. */ if (reset_state == VNIC_PROBED) return 0; rc = ibmvnic_login(netdev); if (rc) { adapter->state = reset_state; return rc; } if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || adapter->wait_for_reset) { rc = init_resources(adapter); if (rc) return rc; } 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) { release_rx_pools(adapter); release_tx_pools(adapter); release_napi(adapter); release_vpd_data(adapter); rc = init_resources(adapter); if (rc) return rc; } else { rc = reset_tx_pools(adapter); if (rc) return rc; rc = reset_rx_pools(adapter); if (rc) return rc; } ibmvnic_disable_irqs(adapter); } adapter->state = VNIC_CLOSED; if (reset_state == VNIC_CLOSED) return 0; rc = __ibmvnic_open(netdev); if (rc) { if (list_empty(&adapter->rwi_list)) adapter->state = VNIC_CLOSED; else adapter->state = reset_state; return 0; } /* kick napi */ for (i = 0; i < adapter->req_rx_queues; i++) napi_schedule(&adapter->napi[i]); if (adapter->reset_reason != VNIC_RESET_FAILOVER && adapter->reset_reason != VNIC_RESET_CHANGE_PARAM) call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); netif_carrier_on(netdev); return 0; } 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 (%d)\n", rwi->reset_reason); 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; rc = init_crq_queue(adapter); if (rc) { netdev_err(adapter->netdev, "Couldn't initialize crq. rc=%d\n", rc); return rc; } rc = ibmvnic_init(adapter); if (rc) return rc; /* If the adapter was in PROBE state prior to the reset, * exit here. */ if (reset_state == VNIC_PROBED) return 0; rc = ibmvnic_login(netdev); if (rc) { adapter->state = VNIC_PROBED; return 0; } rc = init_resources(adapter); if (rc) return rc; ibmvnic_disable_irqs(adapter); adapter->state = VNIC_CLOSED; if (reset_state == VNIC_CLOSED) return 0; rc = __ibmvnic_open(netdev); if (rc) { if (list_empty(&adapter->rwi_list)) adapter->state = VNIC_CLOSED; else adapter->state = reset_state; return 0; } netif_carrier_on(netdev); return 0; } 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; } static void free_all_rwi(struct ibmvnic_adapter *adapter) { struct ibmvnic_rwi *rwi; rwi = get_next_rwi(adapter); while (rwi) { kfree(rwi); rwi = get_next_rwi(adapter); } } static void __ibmvnic_reset(struct work_struct *work) { struct ibmvnic_rwi *rwi; struct ibmvnic_adapter *adapter; struct net_device *netdev; bool we_lock_rtnl = false; u32 reset_state; int rc = 0; adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); netdev = adapter->netdev; /* netif_set_real_num_xx_queues needs to take rtnl lock here * unless wait_for_reset is set, in which case the rtnl lock * has already been taken before initializing the reset */ if (!adapter->wait_for_reset) { rtnl_lock(); we_lock_rtnl = true; } reset_state = adapter->state; rwi = get_next_rwi(adapter); while (rwi) { if (adapter->force_reset_recovery) { adapter->force_reset_recovery = false; rc = do_hard_reset(adapter, rwi, reset_state); } else { rc = do_reset(adapter, rwi, reset_state); } kfree(rwi); if (rc && rc != IBMVNIC_INIT_FAILED && !adapter->force_reset_recovery) break; rwi = get_next_rwi(adapter); } if (adapter->wait_for_reset) { adapter->wait_for_reset = false; adapter->reset_done_rc = rc; complete(&adapter->reset_done); } if (rc) { netdev_dbg(adapter->netdev, "Reset failed\n"); free_all_rwi(adapter); } adapter->resetting = false; if (we_lock_rtnl) rtnl_unlock(); } static int ibmvnic_reset(struct ibmvnic_adapter *adapter, enum ibmvnic_reset_reason reason) { struct list_head *entry, *tmp_entry; struct ibmvnic_rwi *rwi, *tmp; struct net_device *netdev = adapter->netdev; unsigned long flags; int ret; if (adapter->state == VNIC_REMOVING || adapter->state == VNIC_REMOVED || adapter->failover_pending) { ret = EBUSY; netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); goto err; } if (adapter->state == VNIC_PROBING) { netdev_warn(netdev, "Adapter reset during probe\n"); ret = adapter->init_done_rc = EAGAIN; goto err; } spin_lock_irqsave(&adapter->rwi_lock, flags); list_for_each(entry, &adapter->rwi_list) { tmp = list_entry(entry, struct ibmvnic_rwi, list); if (tmp->reset_reason == reason) { netdev_dbg(netdev, "Skipping matching reset\n"); spin_unlock_irqrestore(&adapter->rwi_lock, flags); ret = EBUSY; goto err; } } rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); if (!rwi) { spin_unlock_irqrestore(&adapter->rwi_lock, flags); ibmvnic_close(netdev); ret = ENOMEM; goto err; } /* if we just received a transport event, * flush reset queue and process this reset */ if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) list_del(entry); } rwi->reset_reason = reason; list_add_tail(&rwi->list, &adapter->rwi_list); spin_unlock_irqrestore(&adapter->rwi_lock, flags); adapter->resetting = true; netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); schedule_work(&adapter->ibmvnic_reset); return 0; err: if (adapter->wait_for_reset) adapter->wait_for_reset = false; return -ret; } static void ibmvnic_tx_timeout(struct net_device *dev) { struct ibmvnic_adapter *adapter = netdev_priv(dev); 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 net_device *netdev = napi->dev; struct ibmvnic_adapter *adapter = netdev_priv(netdev); int scrq_num = (int)(napi - adapter->napi); int frames_processed = 0; 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(adapter->resetting && adapter->reset_reason != VNIC_RESET_NON_FATAL)) { enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); napi_complete_done(napi, frames_processed); return frames_processed; } if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) break; next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 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; 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) replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); if (frames_processed < budget) { enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); napi_complete_done(napi, frames_processed); if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && napi_reschedule(napi)) { disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 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; init_completion(&adapter->reset_done); adapter->wait_for_reset = true; rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); if (rc) return rc; wait_for_completion(&adapter->reset_done); 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; init_completion(&adapter->reset_done); adapter->wait_for_reset = true; rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); if (rc) return ret; wait_for_completion(&adapter->reset_done); } 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) { u32 supported, advertising; supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE); advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE); cmd->base.speed = SPEED_1000; cmd->base.duplex = DUPLEX_FULL; cmd->base.port = PORT_FIBRE; cmd->base.phy_address = 0; cmd->base.autoneg = AUTONEG_ENABLE; ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, supported); ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, advertising); return 0; } static void ibmvnic_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); strlcpy(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 ibmvnic_adapter *adapter = netdev_priv(netdev); if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; } else { ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; } 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 ibmvnic_adapter *adapter = netdev_priv(netdev); int ret; ret = 0; adapter->desired.rx_entries = ring->rx_pending; adapter->desired.tx_entries = ring->tx_pending; ret = wait_for_reset(adapter); if (!ret && (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || adapter->req_tx_entries_per_subcrq != ring->tx_pending)) netdev_info(netdev, "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", ring->rx_pending, ring->tx_pending, adapter->req_rx_add_entries_per_subcrq, adapter->req_tx_entries_per_subcrq); return ret; } static void ibmvnic_get_channels(struct net_device *netdev, struct ethtool_channels *channels) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { channels->max_rx = adapter->max_rx_queues; channels->max_tx = adapter->max_tx_queues; } else { channels->max_rx = IBMVNIC_MAX_QUEUES; channels->max_tx = IBMVNIC_MAX_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); int ret; ret = 0; adapter->desired.rx_queues = channels->rx_count; adapter->desired.tx_queues = channels->tx_count; ret = wait_for_reset(adapter); if (!ret && (adapter->req_rx_queues != channels->rx_count || adapter->req_tx_queues != channels->tx_count)) netdev_info(netdev, "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", channels->rx_count, channels->tx_count, adapter->req_rx_queues, adapter->req_tx_queues); return ret; } static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) { struct ibmvnic_adapter *adapter = netdev_priv(dev); int i; switch (stringset) { case ETH_SS_STATS: 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; } break; case ETH_SS_PRIV_FLAGS: for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) strcpy(data + i * ETH_GSTRING_LEN, ibmvnic_priv_flags[i]); break; default: return; } } 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; case ETH_SS_PRIV_FLAGS: return ARRAY_SIZE(ibmvnic_priv_flags); 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 */ init_completion(&adapter->stats_done); rc = ibmvnic_send_crq(adapter, &crq); if (rc) return; wait_for_completion(&adapter->stats_done); 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 u32 ibmvnic_get_priv_flags(struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); return adapter->priv_flags; } static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); if (which_maxes) adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; else adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; return 0; } 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, .get_priv_flags = ibmvnic_get_priv_flags, .set_priv_flags = ibmvnic_set_priv_flags, }; /* 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->irq) { free_irq(scrq->irq, scrq); irq_dispose_mapping(scrq->irq); scrq->irq = 0; } memset(scrq->msgs, 0, 4 * PAGE_SIZE); atomic_set(&scrq->used, 0); scrq->cur = 0; 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; 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_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, DMA_BIDIRECTIONAL); free_pages((unsigned long)scrq->msgs, 2); 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; } 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); 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; reg_failed: dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, DMA_BIDIRECTIONAL); map_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; 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); 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; } 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 (adapter->resetting && adapter->reset_reason == VNIC_RESET_MOBILITY) { u64 val = (0xff000000) | scrq->hw_irq; rc = plpar_hcall_norets(H_EOI, val); if (rc) dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", val, rc); } 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; union sub_crq *next; int index; int i, j; u8 *first; restart_loop: while (pending_scrq(adapter, scrq)) { unsigned int pool = scrq->pool_index; int num_entries = 0; next = ibmvnic_next_scrq(adapter, scrq); for (i = 0; i < next->tx_comp.num_comps; i++) { if (next->tx_comp.rcs[i]) { dev_err(dev, "tx error %x\n", next->tx_comp.rcs[i]); continue; } 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]; for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { if (!txbuff->data_dma[j]) continue; txbuff->data_dma[j] = 0; } /* if sub_crq was sent indirectly */ first = &txbuff->indir_arr[0].generic.first; if (*first == IBMVNIC_CRQ_CMD) { dma_unmap_single(dev, txbuff->indir_dma, sizeof(txbuff->indir_arr), DMA_TO_DEVICE); *first = 0; } if (txbuff->last_frag) { dev_kfree_skb_any(txbuff->skb); txbuff->skb = NULL; } num_entries += txbuff->num_entries; 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; if (atomic_sub_return(num_entries, &scrq->used) <= (adapter->req_tx_entries_per_subcrq / 2) && __netif_subqueue_stopped(adapter->netdev, scrq->pool_index)) { netif_wake_subqueue(adapter->netdev, scrq->pool_index); netdev_dbg(adapter->netdev, "Started queue %d\n", scrq->pool_index); } } 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; } rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 0, "ibmvnic_tx", 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; } rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 0, "ibmvnic_rx", 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; } } 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->rx_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 -1; 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 -1; } static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) { struct device *dev = &adapter->vdev->dev; union ibmvnic_crq crq; int max_entries; if (!retry) { /* Sub-CRQ entries are 32 byte long */ int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 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_MAX_LTB_SIZE / (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { adapter->desired.tx_entries = max_entries; } if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * adapter->desired.rx_entries > IBMVNIC_MAX_LTB_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; } 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); atomic_inc(&adapter->running_cap_crqs); 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); atomic_inc(&adapter->running_cap_crqs); 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); atomic_inc(&adapter->running_cap_crqs); 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); atomic_inc(&adapter->running_cap_crqs); 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); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.request_capability.capability = cpu_to_be16(REQ_MTU); crq.request_capability.number = cpu_to_be64(adapter->req_mtu); atomic_inc(&adapter->running_cap_crqs); 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); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); } } else { crq.request_capability.capability = cpu_to_be16(PROMISC_REQUESTED); crq.request_capability.number = cpu_to_be64(0); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); } } static int pending_scrq(struct ibmvnic_adapter *adapter, struct ibmvnic_sub_crq_queue *scrq) { union sub_crq *entry = &scrq->msgs[scrq->cur]; if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) return 1; else return 0; } 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); 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(struct ibmvnic_adapter *adapter, u64 remote_handle, union sub_crq *sub_crq) { unsigned int ua = adapter->vdev->unit_address; struct device *dev = &adapter->vdev->dev; u64 *u64_crq = (u64 *)sub_crq; int rc; netdev_dbg(adapter->netdev, "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", (unsigned long int)cpu_to_be64(remote_handle), (unsigned long int)cpu_to_be64(u64_crq[0]), (unsigned long int)cpu_to_be64(u64_crq[1]), (unsigned long int)cpu_to_be64(u64_crq[2]), (unsigned long int)cpu_to_be64(u64_crq[3])); /* Make sure the hypervisor sees the complete request */ mb(); rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, cpu_to_be64(remote_handle), cpu_to_be64(u64_crq[0]), cpu_to_be64(u64_crq[1]), cpu_to_be64(u64_crq[2]), cpu_to_be64(u64_crq[3])); if (rc) print_subcrq_error(dev, rc, __func__); return rc; } 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 */ mb(); 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 int)cpu_to_be64(u64_crq[0]), (unsigned long int)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 */ mb(); 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"); if (adapter->resetting) ibmvnic_reset(adapter, VNIC_RESET_FATAL); } dev_warn(dev, "Send error (rc=%d)\n", rc); } return rc; } static int ibmvnic_send_crq_init(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; netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 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); } 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); strncpy(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); strncpy(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); strncpy(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; dma_addr_t rsp_buffer_token; dma_addr_t buffer_token; size_t rsp_buffer_size; union ibmvnic_crq crq; size_t buffer_size; __be64 *tx_list_p; __be64 *rx_list_p; int client_data_len; struct vnic_login_client_data *vlcd; 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 -1; } 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 int *)(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); ibmvnic_send_crq(adapter, &crq); return 0; buf_rsp_map_failed: kfree(login_rsp_buffer); buf_rsp_alloc_failed: dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); buf_map_failed: kfree(login_buffer); buf_alloc_failed: return -1; } 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_map_query(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_cap_queries(struct ibmvnic_adapter *adapter) { union ibmvnic_crq crq; atomic_set(&adapter->running_cap_crqs, 0); 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); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(MIN_MTU); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(MAX_MTU); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); atomic_inc(&adapter->running_cap_crqs); ibmvnic_send_crq(adapter, &crq); crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); atomic_inc(&adapter->running_cap_crqs); 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') strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 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; union ibmvnic_crq crq; 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 int *)(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); adapter->ip_offload_ctrl_tok = dma_map_single(dev, &adapter->ip_offload_ctrl, 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; } adapter->ip_offload_ctrl.len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; /* large_rx disabled for now, additional features needed */ adapter->ip_offload_ctrl.large_rx_ipv4 = 0; adapter->ip_offload_ctrl.large_rx_ipv6 = 0; adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO; if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) adapter->netdev->features |= NETIF_F_IP_CSUM; if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) adapter->netdev->features |= NETIF_F_IPV6_CSUM; if ((adapter->netdev->features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) adapter->netdev->features |= NETIF_F_RXCSUM; if (buf->large_tx_ipv4) adapter->netdev->features |= NETIF_F_TSO; if (buf->large_tx_ipv6) adapter->netdev->features |= NETIF_F_TSO6; adapter->netdev->hw_features |= adapter->netdev->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 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; } memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], ETH_ALEN); 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); 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 int)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); } ibmvnic_send_req_caps(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) { union ibmvnic_crq newcrq; int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = &adapter->ip_offload_buf; adapter->wait_capability = false; adapter->ip_offload_tok = dma_map_single(dev, 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(&newcrq, 0, sizeof(newcrq)); newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); newcrq.query_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_tok); ibmvnic_send_crq(adapter, &newcrq); } } 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; int i; 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; } 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 int *)(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_remove(adapter->vdev); return -EIO; } 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 = %d\nfree_pages = %d\n", crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 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) { adapter->wait_capability = false; ibmvnic_send_req_caps(adapter, 0); } } 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 int)cpu_to_be64(u64_crq[0]), (unsigned long int)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; adapter->failover_pending = false; if (!completion_done(&adapter->init_done)) { complete(&adapter->init_done); adapter->init_done_rc = -EIO; } ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 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; if (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; } dev_info(dev, "Partner protocol version is %d\n", crq->version_exchange_rsp.version); if (be16_to_cpu(crq->version_exchange_rsp.version) < ibmvnic_version) ibmvnic_version = be16_to_cpu(crq->version_exchange_rsp.version); send_cap_queries(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; 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; 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(void *data) { struct ibmvnic_adapter *adapter = data; struct ibmvnic_crq_queue *queue = &adapter->crq; union ibmvnic_crq *crq; unsigned long flags; bool done = false; spin_lock_irqsave(&queue->lock, flags); while (!done) { /* Pull all the valid messages off the CRQ */ while ((crq = ibmvnic_next_crq(adapter)) != NULL) { ibmvnic_handle_crq(crq, adapter); crq->generic.first = 0; } /* remain in tasklet until all * capabilities responses are received */ if (!adapter->wait_capability) done = true; } /* if capabilities CRQ's were sent in this tasklet, the following * tasklet must wait until all responses are received */ if (atomic_read(&adapter->running_cap_crqs) != 0) adapter->wait_capability = true; 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 */ 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_init(&adapter->tasklet, (void *)ibmvnic_tasklet, (unsigned long)adapter); netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_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); 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) { struct device *dev = &adapter->vdev->dev; unsigned long timeout = msecs_to_jiffies(30000); u64 old_num_rx_queues, old_num_tx_queues; int rc; adapter->from_passive_init = false; old_num_rx_queues = adapter->req_rx_queues; old_num_tx_queues = adapter->req_tx_queues; init_completion(&adapter->init_done); adapter->init_done_rc = 0; ibmvnic_send_crq_init(adapter); if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { dev_err(dev, "Initialization sequence timed out\n"); return -1; } if (adapter->init_done_rc) { release_crq_queue(adapter); return adapter->init_done_rc; } if (adapter->from_passive_init) { adapter->state = VNIC_OPEN; adapter->from_passive_init = false; return -1; } if (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 { 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 int ibmvnic_init(struct ibmvnic_adapter *adapter) { struct device *dev = &adapter->vdev->dev; unsigned long timeout = msecs_to_jiffies(30000); int rc; adapter->from_passive_init = false; init_completion(&adapter->init_done); adapter->init_done_rc = 0; ibmvnic_send_crq_init(adapter); if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { dev_err(dev, "Initialization sequence timed out\n"); return -1; } if (adapter->init_done_rc) { release_crq_queue(adapter); return adapter->init_done_rc; } if (adapter->from_passive_init) { adapter->state = VNIC_OPEN; adapter->from_passive_init = false; return -1; } 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; 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; ether_addr_copy(adapter->mac_addr, mac_addr_p); ether_addr_copy(netdev->dev_addr, 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); spin_lock_init(&adapter->stats_lock); INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); INIT_LIST_HEAD(&adapter->rwi_list); spin_lock_init(&adapter->rwi_lock); adapter->resetting = false; adapter->mac_change_pending = false; do { 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_init(adapter); if (rc && rc != EAGAIN) goto ibmvnic_init_fail; } while (rc == EAGAIN); rc = init_stats_buffers(adapter); if (rc) goto ibmvnic_init_fail; rc = init_stats_token(adapter); if (rc) goto ibmvnic_stats_fail; netdev->mtu = adapter->req_mtu - ETH_HLEN; netdev->min_mtu = adapter->min_mtu - ETH_HLEN; netdev->max_mtu = adapter->max_mtu - ETH_HLEN; rc = device_create_file(&dev->dev, &dev_attr_failover); if (rc) goto ibmvnic_dev_file_err; netif_carrier_off(netdev); 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"); adapter->state = VNIC_PROBED; adapter->wait_for_reset = false; return 0; 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); free_netdev(netdev); return rc; } static int ibmvnic_remove(struct vio_dev *dev) { struct net_device *netdev = dev_get_drvdata(&dev->dev); struct ibmvnic_adapter *adapter = netdev_priv(netdev); adapter->state = VNIC_REMOVING; rtnl_lock(); unregister_netdevice(netdev); release_resources(adapter); release_sub_crqs(adapter, 1); release_crq_queue(adapter); release_stats_token(adapter); release_stats_buffers(adapter); adapter->state = VNIC_REMOVED; rtnl_unlock(); device_remove_file(&dev->dev, &dev_attr_failover); free_netdev(netdev); dev_set_drvdata(&dev->dev, NULL); return 0; } 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); return -EINVAL; } 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, "Client initiated failover failed, rc %ld\n", rc); return -EINVAL; } 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 < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 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) { pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, IBMVNIC_DRIVER_VERSION); return vio_register_driver(&ibmvnic_driver); } static void __exit ibmvnic_module_exit(void) { vio_unregister_driver(&ibmvnic_driver); } module_init(ibmvnic_module_init); module_exit(ibmvnic_module_exit);
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