| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Brice Goglin | 17101 | 84.13% | 77 | 39.90% |
| Jon Mason | 738 | 3.63% | 8 | 4.15% |
| Andrew Gallatin | 654 | 3.22% | 9 | 4.66% |
| Stanislaw Gruszka | 520 | 2.56% | 3 | 1.55% |
| Rusty Russell | 193 | 0.95% | 1 | 0.52% |
| Eric Dumazet | 173 | 0.85% | 9 | 4.66% |
| Joe Perches | 130 | 0.64% | 5 | 2.59% |
| Stephen Hemminger | 107 | 0.53% | 5 | 2.59% |
| Christophe Jaillet | 74 | 0.36% | 2 | 1.04% |
| Al Viro | 67 | 0.33% | 2 | 1.04% |
| Jeff Garzik | 51 | 0.25% | 3 | 1.55% |
| Alexander Gordeev | 40 | 0.20% | 1 | 0.52% |
| Ben Hutchings | 38 | 0.19% | 3 | 1.55% |
| David Woodhouse | 36 | 0.18% | 1 | 0.52% |
| Vaibhav Gupta | 34 | 0.17% | 1 | 0.52% |
| Philippe Reynes | 32 | 0.16% | 1 | 0.52% |
| Hyong-Youb Kim | 30 | 0.15% | 1 | 0.52% |
| FUJITA Tomonori | 26 | 0.13% | 1 | 0.52% |
| Jarod Wilson | 20 | 0.10% | 1 | 0.52% |
| Luis R. Rodriguez | 16 | 0.08% | 2 | 1.04% |
| Florian Fainelli | 15 | 0.07% | 1 | 0.52% |
| Patrick McHardy | 15 | 0.07% | 5 | 2.59% |
| Kees Cook | 14 | 0.07% | 1 | 0.52% |
| Jakub Kiciński | 14 | 0.07% | 6 | 3.11% |
| Jason A. Donenfeld | 14 | 0.07% | 1 | 0.52% |
| Michał Mirosław | 14 | 0.07% | 3 | 1.55% |
| Jiri Pirko | 13 | 0.06% | 3 | 1.55% |
| Yufeng Mo | 10 | 0.05% | 1 | 0.52% |
| Maik Hampel | 10 | 0.05% | 1 | 0.52% |
| Jonathan Lemon | 10 | 0.05% | 1 | 0.52% |
| Jiang Liu | 10 | 0.05% | 1 | 0.52% |
| Matthew Wilcox | 9 | 0.04% | 1 | 0.52% |
| Xiaomeng Tong | 9 | 0.04% | 1 | 0.52% |
| Julia Lawall | 8 | 0.04% | 1 | 0.52% |
| Ian Campbell | 8 | 0.04% | 2 | 1.04% |
| Yang Hongyang | 8 | 0.04% | 2 | 1.04% |
| Benoit Taine | 6 | 0.03% | 1 | 0.52% |
| Divy Le Ray | 6 | 0.03% | 1 | 0.52% |
| Dan Streetman | 5 | 0.02% | 1 | 0.52% |
| Jiapeng Chong | 5 | 0.02% | 1 | 0.52% |
| Hao Chen | 5 | 0.02% | 1 | 0.52% |
| Wolfram Sang | 4 | 0.02% | 1 | 0.52% |
| Paul Gortmaker | 3 | 0.01% | 1 | 0.52% |
| Vignesh Babu | 3 | 0.01% | 1 | 0.52% |
| Wilfried Klaebe | 3 | 0.01% | 1 | 0.52% |
| Yijing Wang | 3 | 0.01% | 1 | 0.52% |
| François Romieu | 2 | 0.01% | 1 | 0.52% |
| David S. Miller | 2 | 0.01% | 1 | 0.52% |
| Linus Torvalds (pre-git) | 2 | 0.01% | 1 | 0.52% |
| Tejun Heo | 2 | 0.01% | 1 | 0.52% |
| Arnaldo Carvalho de Melo | 2 | 0.01% | 1 | 0.52% |
| Alexander Duyck | 2 | 0.01% | 1 | 0.52% |
| Wei Yongjun | 1 | 0.00% | 1 | 0.52% |
| Herbert Xu | 1 | 0.00% | 1 | 0.52% |
| Yuval Mintz | 1 | 0.00% | 1 | 0.52% |
| Linus Torvalds | 1 | 0.00% | 1 | 0.52% |
| xupanda | 1 | 0.00% | 1 | 0.52% |
| Adrian Bunk | 1 | 0.00% | 1 | 0.52% |
| Wenwen Wang | 1 | 0.00% | 1 | 0.52% |
| Lucas De Marchi | 1 | 0.00% | 1 | 0.52% |
| Ding Xiang | 1 | 0.00% | 1 | 0.52% |
| Wei Yang | 1 | 0.00% | 1 | 0.52% |
| Total | 20326 | 193 |
/************************************************************************* * myri10ge.c: Myricom Myri-10G Ethernet driver. * * Copyright (C) 2005 - 2011 Myricom, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of Myricom, Inc. nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * * If the eeprom on your board is not recent enough, you will need to get a * newer firmware image at: * http://www.myri.com/scs/download-Myri10GE.html * * Contact Information: * <help@myri.com> * Myricom, Inc., 325N Santa Anita Avenue, Arcadia, CA 91006 *************************************************************************/ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/tcp.h> #include <linux/netdevice.h> #include <linux/skbuff.h> #include <linux/string.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/dma-mapping.h> #include <linux/etherdevice.h> #include <linux/if_ether.h> #include <linux/if_vlan.h> #include <linux/dca.h> #include <linux/ip.h> #include <linux/inet.h> #include <linux/in.h> #include <linux/ethtool.h> #include <linux/firmware.h> #include <linux/delay.h> #include <linux/timer.h> #include <linux/vmalloc.h> #include <linux/crc32.h> #include <linux/moduleparam.h> #include <linux/io.h> #include <linux/log2.h> #include <linux/slab.h> #include <linux/prefetch.h> #include <net/checksum.h> #include <net/gso.h> #include <net/ip.h> #include <net/tcp.h> #include <asm/byteorder.h> #include <asm/processor.h> #include "myri10ge_mcp.h" #include "myri10ge_mcp_gen_header.h" #define MYRI10GE_VERSION_STR "1.5.3-1.534" MODULE_DESCRIPTION("Myricom 10G driver (10GbE)"); MODULE_AUTHOR("Maintainer: help@myri.com"); MODULE_VERSION(MYRI10GE_VERSION_STR); MODULE_LICENSE("Dual BSD/GPL"); #define MYRI10GE_MAX_ETHER_MTU 9014 #define MYRI10GE_ETH_STOPPED 0 #define MYRI10GE_ETH_STOPPING 1 #define MYRI10GE_ETH_STARTING 2 #define MYRI10GE_ETH_RUNNING 3 #define MYRI10GE_ETH_OPEN_FAILED 4 #define MYRI10GE_EEPROM_STRINGS_SIZE 256 #define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2) #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff) #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff #define MYRI10GE_ALLOC_ORDER 0 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE) #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1) #define MYRI10GE_MAX_SLICES 32 struct myri10ge_rx_buffer_state { struct page *page; int page_offset; DEFINE_DMA_UNMAP_ADDR(bus); DEFINE_DMA_UNMAP_LEN(len); }; struct myri10ge_tx_buffer_state { struct sk_buff *skb; int last; DEFINE_DMA_UNMAP_ADDR(bus); DEFINE_DMA_UNMAP_LEN(len); }; struct myri10ge_cmd { u32 data0; u32 data1; u32 data2; }; struct myri10ge_rx_buf { struct mcp_kreq_ether_recv __iomem *lanai; /* lanai ptr for recv ring */ struct mcp_kreq_ether_recv *shadow; /* host shadow of recv ring */ struct myri10ge_rx_buffer_state *info; struct page *page; dma_addr_t bus; int page_offset; int cnt; int fill_cnt; int alloc_fail; int mask; /* number of rx slots -1 */ int watchdog_needed; }; struct myri10ge_tx_buf { struct mcp_kreq_ether_send __iomem *lanai; /* lanai ptr for sendq */ __be32 __iomem *send_go; /* "go" doorbell ptr */ __be32 __iomem *send_stop; /* "stop" doorbell ptr */ struct mcp_kreq_ether_send *req_list; /* host shadow of sendq */ char *req_bytes; struct myri10ge_tx_buffer_state *info; int mask; /* number of transmit slots -1 */ int req ____cacheline_aligned; /* transmit slots submitted */ int pkt_start; /* packets started */ int stop_queue; int linearized; int done ____cacheline_aligned; /* transmit slots completed */ int pkt_done; /* packets completed */ int wake_queue; int queue_active; }; struct myri10ge_rx_done { struct mcp_slot *entry; dma_addr_t bus; int cnt; int idx; }; struct myri10ge_slice_netstats { unsigned long rx_packets; unsigned long tx_packets; unsigned long rx_bytes; unsigned long tx_bytes; unsigned long rx_dropped; unsigned long tx_dropped; }; struct myri10ge_slice_state { struct myri10ge_tx_buf tx; /* transmit ring */ struct myri10ge_rx_buf rx_small; struct myri10ge_rx_buf rx_big; struct myri10ge_rx_done rx_done; struct net_device *dev; struct napi_struct napi; struct myri10ge_priv *mgp; struct myri10ge_slice_netstats stats; __be32 __iomem *irq_claim; struct mcp_irq_data *fw_stats; dma_addr_t fw_stats_bus; int watchdog_tx_done; int watchdog_tx_req; int watchdog_rx_done; int stuck; #ifdef CONFIG_MYRI10GE_DCA int cached_dca_tag; int cpu; __be32 __iomem *dca_tag; #endif char irq_desc[32]; }; struct myri10ge_priv { struct myri10ge_slice_state *ss; int tx_boundary; /* boundary transmits cannot cross */ int num_slices; int running; /* running? */ int small_bytes; int big_bytes; int max_intr_slots; struct net_device *dev; u8 __iomem *sram; int sram_size; unsigned long board_span; unsigned long iomem_base; __be32 __iomem *irq_deassert; char *mac_addr_string; struct mcp_cmd_response *cmd; dma_addr_t cmd_bus; struct pci_dev *pdev; int msi_enabled; int msix_enabled; struct msix_entry *msix_vectors; #ifdef CONFIG_MYRI10GE_DCA int dca_enabled; int relaxed_order; #endif u32 link_state; unsigned int rdma_tags_available; int intr_coal_delay; __be32 __iomem *intr_coal_delay_ptr; int wc_cookie; int down_cnt; wait_queue_head_t down_wq; struct work_struct watchdog_work; struct timer_list watchdog_timer; int watchdog_resets; int watchdog_pause; int pause; bool fw_name_allocated; char *fw_name; char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE]; char *product_code_string; char fw_version[128]; int fw_ver_major; int fw_ver_minor; int fw_ver_tiny; int adopted_rx_filter_bug; u8 mac_addr[ETH_ALEN]; /* eeprom mac address */ unsigned long serial_number; int vendor_specific_offset; int fw_multicast_support; u32 features; u32 max_tso6; u32 read_dma; u32 write_dma; u32 read_write_dma; u32 link_changes; u32 msg_enable; unsigned int board_number; int rebooted; }; static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat"; static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat"; static char *myri10ge_fw_rss_unaligned = "myri10ge_rss_ethp_z8e.dat"; static char *myri10ge_fw_rss_aligned = "myri10ge_rss_eth_z8e.dat"; MODULE_FIRMWARE("myri10ge_ethp_z8e.dat"); MODULE_FIRMWARE("myri10ge_eth_z8e.dat"); MODULE_FIRMWARE("myri10ge_rss_ethp_z8e.dat"); MODULE_FIRMWARE("myri10ge_rss_eth_z8e.dat"); /* Careful: must be accessed under kernel_param_lock() */ static char *myri10ge_fw_name = NULL; module_param(myri10ge_fw_name, charp, 0644); MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name"); #define MYRI10GE_MAX_BOARDS 8 static char *myri10ge_fw_names[MYRI10GE_MAX_BOARDS] = {[0 ... (MYRI10GE_MAX_BOARDS - 1)] = NULL }; module_param_array_named(myri10ge_fw_names, myri10ge_fw_names, charp, NULL, 0444); MODULE_PARM_DESC(myri10ge_fw_names, "Firmware image names per board"); static int myri10ge_ecrc_enable = 1; module_param(myri10ge_ecrc_enable, int, 0444); MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E"); static int myri10ge_small_bytes = -1; /* -1 == auto */ module_param(myri10ge_small_bytes, int, 0644); MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets"); static int myri10ge_msi = 1; /* enable msi by default */ module_param(myri10ge_msi, int, 0644); MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts"); static int myri10ge_intr_coal_delay = 75; module_param(myri10ge_intr_coal_delay, int, 0444); MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay"); static int myri10ge_flow_control = 1; module_param(myri10ge_flow_control, int, 0444); MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter"); static int myri10ge_deassert_wait = 1; module_param(myri10ge_deassert_wait, int, 0644); MODULE_PARM_DESC(myri10ge_deassert_wait, "Wait when deasserting legacy interrupts"); static int myri10ge_force_firmware = 0; module_param(myri10ge_force_firmware, int, 0444); MODULE_PARM_DESC(myri10ge_force_firmware, "Force firmware to assume aligned completions"); static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN; module_param(myri10ge_initial_mtu, int, 0444); MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU"); static int myri10ge_napi_weight = 64; module_param(myri10ge_napi_weight, int, 0444); MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight"); static int myri10ge_watchdog_timeout = 1; module_param(myri10ge_watchdog_timeout, int, 0444); MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout"); static int myri10ge_max_irq_loops = 1048576; module_param(myri10ge_max_irq_loops, int, 0444); MODULE_PARM_DESC(myri10ge_max_irq_loops, "Set stuck legacy IRQ detection threshold"); #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK static int myri10ge_debug = -1; /* defaults above */ module_param(myri10ge_debug, int, 0); MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)"); static int myri10ge_fill_thresh = 256; module_param(myri10ge_fill_thresh, int, 0644); MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed"); static int myri10ge_reset_recover = 1; static int myri10ge_max_slices = 1; module_param(myri10ge_max_slices, int, 0444); MODULE_PARM_DESC(myri10ge_max_slices, "Max tx/rx queues"); static int myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_DST_PORT; module_param(myri10ge_rss_hash, int, 0444); MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do"); static int myri10ge_dca = 1; module_param(myri10ge_dca, int, 0444); MODULE_PARM_DESC(myri10ge_dca, "Enable DCA if possible"); #define MYRI10GE_FW_OFFSET 1024*1024 #define MYRI10GE_HIGHPART_TO_U32(X) \ (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0) #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X)) #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8) static void myri10ge_set_multicast_list(struct net_device *dev); static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb, struct net_device *dev); static inline void put_be32(__be32 val, __be32 __iomem * p) { __raw_writel((__force __u32) val, (__force void __iomem *)p); } static void myri10ge_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats); static void set_fw_name(struct myri10ge_priv *mgp, char *name, bool allocated) { if (mgp->fw_name_allocated) kfree(mgp->fw_name); mgp->fw_name = name; mgp->fw_name_allocated = allocated; } static int myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd, struct myri10ge_cmd *data, int atomic) { struct mcp_cmd *buf; char buf_bytes[sizeof(*buf) + 8]; struct mcp_cmd_response *response = mgp->cmd; char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD; u32 dma_low, dma_high, result, value; int sleep_total = 0; /* ensure buf is aligned to 8 bytes */ buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8); buf->data0 = htonl(data->data0); buf->data1 = htonl(data->data1); buf->data2 = htonl(data->data2); buf->cmd = htonl(cmd); dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus); dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus); buf->response_addr.low = htonl(dma_low); buf->response_addr.high = htonl(dma_high); response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT); mb(); myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf)); /* wait up to 15ms. Longest command is the DMA benchmark, * which is capped at 5ms, but runs from a timeout handler * that runs every 7.8ms. So a 15ms timeout leaves us with * a 2.2ms margin */ if (atomic) { /* if atomic is set, do not sleep, * and try to get the completion quickly * (1ms will be enough for those commands) */ for (sleep_total = 0; sleep_total < 1000 && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT); sleep_total += 10) { udelay(10); mb(); } } else { /* use msleep for most command */ for (sleep_total = 0; sleep_total < 15 && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT); sleep_total++) msleep(1); } result = ntohl(response->result); value = ntohl(response->data); if (result != MYRI10GE_NO_RESPONSE_RESULT) { if (result == 0) { data->data0 = value; return 0; } else if (result == MXGEFW_CMD_UNKNOWN) { return -ENOSYS; } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) { return -E2BIG; } else if (result == MXGEFW_CMD_ERROR_RANGE && cmd == MXGEFW_CMD_ENABLE_RSS_QUEUES && (data-> data1 & MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES) != 0) { return -ERANGE; } else { dev_err(&mgp->pdev->dev, "command %d failed, result = %d\n", cmd, result); return -ENXIO; } } dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n", cmd, result); return -EAGAIN; } /* * The eeprom strings on the lanaiX have the format * SN=x\0 * MAC=x:x:x:x:x:x\0 * PT:ddd mmm xx xx:xx:xx xx\0 * PV:ddd mmm xx xx:xx:xx xx\0 */ static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp) { char *ptr, *limit; int i; ptr = mgp->eeprom_strings; limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE; while (*ptr != '\0' && ptr < limit) { if (memcmp(ptr, "MAC=", 4) == 0) { ptr += 4; mgp->mac_addr_string = ptr; for (i = 0; i < 6; i++) { if ((ptr + 2) > limit) goto abort; mgp->mac_addr[i] = simple_strtoul(ptr, &ptr, 16); ptr += 1; } } if (memcmp(ptr, "PC=", 3) == 0) { ptr += 3; mgp->product_code_string = ptr; } if (memcmp((const void *)ptr, "SN=", 3) == 0) { ptr += 3; mgp->serial_number = simple_strtoul(ptr, &ptr, 10); } while (ptr < limit && *ptr++) ; } return 0; abort: dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n"); return -ENXIO; } /* * Enable or disable periodic RDMAs from the host to make certain * chipsets resend dropped PCIe messages */ static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable) { char __iomem *submit; __be32 buf[16] __attribute__ ((__aligned__(8))); u32 dma_low, dma_high; int i; /* clear confirmation addr */ mgp->cmd->data = 0; mb(); /* send a rdma command to the PCIe engine, and wait for the * response in the confirmation address. The firmware should * write a -1 there to indicate it is alive and well */ dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus); dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus); buf[0] = htonl(dma_high); /* confirm addr MSW */ buf[1] = htonl(dma_low); /* confirm addr LSW */ buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */ buf[3] = htonl(dma_high); /* dummy addr MSW */ buf[4] = htonl(dma_low); /* dummy addr LSW */ buf[5] = htonl(enable); /* enable? */ submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA; myri10ge_pio_copy(submit, &buf, sizeof(buf)); for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++) msleep(1); if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n", (enable ? "enable" : "disable")); } static int myri10ge_validate_firmware(struct myri10ge_priv *mgp, struct mcp_gen_header *hdr) { struct device *dev = &mgp->pdev->dev; /* check firmware type */ if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) { dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type)); return -EINVAL; } /* save firmware version for ethtool */ strscpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version)); sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major, &mgp->fw_ver_minor, &mgp->fw_ver_tiny); if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR && mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) { dev_err(dev, "Found firmware version %s\n", mgp->fw_version); dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR, MXGEFW_VERSION_MINOR); return -EINVAL; } return 0; } static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size) { unsigned crc, reread_crc; const struct firmware *fw; struct device *dev = &mgp->pdev->dev; unsigned char *fw_readback; struct mcp_gen_header *hdr; size_t hdr_offset; int status; unsigned i; if (request_firmware(&fw, mgp->fw_name, dev) < 0) { dev_err(dev, "Unable to load %s firmware image via hotplug\n", mgp->fw_name); status = -EINVAL; goto abort_with_nothing; } /* check size */ if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET || fw->size < MCP_HEADER_PTR_OFFSET + 4) { dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size); status = -EINVAL; goto abort_with_fw; } /* check id */ hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET)); if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) { dev_err(dev, "Bad firmware file\n"); status = -EINVAL; goto abort_with_fw; } hdr = (void *)(fw->data + hdr_offset); status = myri10ge_validate_firmware(mgp, hdr); if (status != 0) goto abort_with_fw; crc = crc32(~0, fw->data, fw->size); for (i = 0; i < fw->size; i += 256) { myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i, fw->data + i, min(256U, (unsigned)(fw->size - i))); mb(); readb(mgp->sram); } fw_readback = vmalloc(fw->size); if (!fw_readback) { status = -ENOMEM; goto abort_with_fw; } /* corruption checking is good for parity recovery and buggy chipset */ memcpy_fromio(fw_readback, mgp->sram + MYRI10GE_FW_OFFSET, fw->size); reread_crc = crc32(~0, fw_readback, fw->size); vfree(fw_readback); if (crc != reread_crc) { dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n", (unsigned)fw->size, reread_crc, crc); status = -EIO; goto abort_with_fw; } *size = (u32) fw->size; abort_with_fw: release_firmware(fw); abort_with_nothing: return status; } static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp) { struct mcp_gen_header *hdr; struct device *dev = &mgp->pdev->dev; const size_t bytes = sizeof(struct mcp_gen_header); size_t hdr_offset; int status; /* find running firmware header */ hdr_offset = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET)); if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) { dev_err(dev, "Running firmware has bad header offset (%d)\n", (int)hdr_offset); return -EIO; } /* copy header of running firmware from SRAM to host memory to * validate firmware */ hdr = kmalloc(bytes, GFP_KERNEL); if (hdr == NULL) return -ENOMEM; memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes); status = myri10ge_validate_firmware(mgp, hdr); kfree(hdr); /* check to see if adopted firmware has bug where adopting * it will cause broadcasts to be filtered unless the NIC * is kept in ALLMULTI mode */ if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 && mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) { mgp->adopted_rx_filter_bug = 1; dev_warn(dev, "Adopting fw %d.%d.%d: " "working around rx filter bug\n", mgp->fw_ver_major, mgp->fw_ver_minor, mgp->fw_ver_tiny); } return status; } static int myri10ge_get_firmware_capabilities(struct myri10ge_priv *mgp) { struct myri10ge_cmd cmd; int status; /* probe for IPv6 TSO support */ mgp->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO; status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE, &cmd, 0); if (status == 0) { mgp->max_tso6 = cmd.data0; mgp->features |= NETIF_F_TSO6; } status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0); if (status != 0) { dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_GET_RX_RING_SIZE\n"); return -ENXIO; } mgp->max_intr_slots = 2 * (cmd.data0 / sizeof(struct mcp_dma_addr)); return 0; } static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt) { char __iomem *submit; __be32 buf[16] __attribute__ ((__aligned__(8))); u32 dma_low, dma_high, size; int status, i; size = 0; status = myri10ge_load_hotplug_firmware(mgp, &size); if (status) { if (!adopt) return status; dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n"); /* Do not attempt to adopt firmware if there * was a bad crc */ if (status == -EIO) return status; status = myri10ge_adopt_running_firmware(mgp); if (status != 0) { dev_err(&mgp->pdev->dev, "failed to adopt running firmware\n"); return status; } dev_info(&mgp->pdev->dev, "Successfully adopted running firmware\n"); if (mgp->tx_boundary == 4096) { dev_warn(&mgp->pdev->dev, "Using firmware currently running on NIC" ". For optimal\n"); dev_warn(&mgp->pdev->dev, "performance consider loading optimized " "firmware\n"); dev_warn(&mgp->pdev->dev, "via hotplug\n"); } set_fw_name(mgp, "adopted", false); mgp->tx_boundary = 2048; myri10ge_dummy_rdma(mgp, 1); status = myri10ge_get_firmware_capabilities(mgp); return status; } /* clear confirmation addr */ mgp->cmd->data = 0; mb(); /* send a reload command to the bootstrap MCP, and wait for the * response in the confirmation address. The firmware should * write a -1 there to indicate it is alive and well */ dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus); dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus); buf[0] = htonl(dma_high); /* confirm addr MSW */ buf[1] = htonl(dma_low); /* confirm addr LSW */ buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */ /* FIX: All newest firmware should un-protect the bottom of * the sram before handoff. However, the very first interfaces * do not. Therefore the handoff copy must skip the first 8 bytes */ buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */ buf[4] = htonl(size - 8); /* length of code */ buf[5] = htonl(8); /* where to copy to */ buf[6] = htonl(0); /* where to jump to */ submit = mgp->sram + MXGEFW_BOOT_HANDOFF; myri10ge_pio_copy(submit, &buf, sizeof(buf)); mb(); msleep(1); mb(); i = 0; while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 9) { msleep(1 << i); i++; } if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) { dev_err(&mgp->pdev->dev, "handoff failed\n"); return -ENXIO; } myri10ge_dummy_rdma(mgp, 1); status = myri10ge_get_firmware_capabilities(mgp); return status; } static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, const u8 * addr) { struct myri10ge_cmd cmd; int status; cmd.data0 = ((addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]); cmd.data1 = ((addr[4] << 8) | (addr[5])); status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0); return status; } static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause) { struct myri10ge_cmd cmd; int status, ctl; ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL; status = myri10ge_send_cmd(mgp, ctl, &cmd, 0); if (status) { netdev_err(mgp->dev, "Failed to set flow control mode\n"); return status; } mgp->pause = pause; return 0; } static void myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic) { struct myri10ge_cmd cmd; int status, ctl; ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC; status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic); if (status) netdev_err(mgp->dev, "Failed to set promisc mode\n"); } static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type) { struct myri10ge_cmd cmd; int status; u32 len; struct page *dmatest_page; dma_addr_t dmatest_bus; char *test = " "; dmatest_page = alloc_page(GFP_KERNEL); if (!dmatest_page) return -ENOMEM; dmatest_bus = dma_map_page(&mgp->pdev->dev, dmatest_page, 0, PAGE_SIZE, DMA_BIDIRECTIONAL); if (unlikely(dma_mapping_error(&mgp->pdev->dev, dmatest_bus))) { __free_page(dmatest_page); return -ENOMEM; } /* Run a small DMA test. * The magic multipliers to the length tell the firmware * to do DMA read, write, or read+write tests. The * results are returned in cmd.data0. The upper 16 * bits or the return is the number of transfers completed. * The lower 16 bits is the time in 0.5us ticks that the * transfers took to complete. */ len = mgp->tx_boundary; cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus); cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus); cmd.data2 = len * 0x10000; status = myri10ge_send_cmd(mgp, test_type, &cmd, 0); if (status != 0) { test = "read"; goto abort; } mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff); cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus); cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus); cmd.data2 = len * 0x1; status = myri10ge_send_cmd(mgp, test_type, &cmd, 0); if (status != 0) { test = "write"; goto abort; } mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff); cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus); cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus); cmd.data2 = len * 0x10001; status = myri10ge_send_cmd(mgp, test_type, &cmd, 0); if (status != 0) { test = "read/write"; goto abort; } mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) / (cmd.data0 & 0xffff); abort: dma_unmap_page(&mgp->pdev->dev, dmatest_bus, PAGE_SIZE, DMA_BIDIRECTIONAL); put_page(dmatest_page); if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST) dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n", test, status); return status; } static int myri10ge_reset(struct myri10ge_priv *mgp) { struct myri10ge_cmd cmd; struct myri10ge_slice_state *ss; int i, status; size_t bytes; #ifdef CONFIG_MYRI10GE_DCA unsigned long dca_tag_off; #endif /* try to send a reset command to the card to see if it * is alive */ memset(&cmd, 0, sizeof(cmd)); status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0); if (status != 0) { dev_err(&mgp->pdev->dev, "failed reset\n"); return -ENXIO; } (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST); /* * Use non-ndis mcp_slot (eg, 4 bytes total, * no toeplitz hash value returned. Older firmware will * not understand this command, but will use the correct * sized mcp_slot, so we ignore error returns */ cmd.data0 = MXGEFW_RSS_MCP_SLOT_TYPE_MIN; (void)myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_MCP_SLOT_TYPE, &cmd, 0); /* Now exchange information about interrupts */ bytes = mgp->max_intr_slots * sizeof(*mgp->ss[0].rx_done.entry); cmd.data0 = (u32) bytes; status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0); /* * Even though we already know how many slices are supported * via myri10ge_probe_slices() MXGEFW_CMD_GET_MAX_RSS_QUEUES * has magic side effects, and must be called after a reset. * It must be called prior to calling any RSS related cmds, * including assigning an interrupt queue for anything but * slice 0. It must also be called *after* * MXGEFW_CMD_SET_INTRQ_SIZE, since the intrq size is used by * the firmware to compute offsets. */ if (mgp->num_slices > 1) { /* ask the maximum number of slices it supports */ status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0); if (status != 0) { dev_err(&mgp->pdev->dev, "failed to get number of slices\n"); } /* * MXGEFW_CMD_ENABLE_RSS_QUEUES must be called prior * to setting up the interrupt queue DMA */ cmd.data0 = mgp->num_slices; cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE; if (mgp->dev->real_num_tx_queues > 1) cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES; status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES, &cmd, 0); /* Firmware older than 1.4.32 only supports multiple * RX queues, so if we get an error, first retry using a * single TX queue before giving up */ if (status != 0 && mgp->dev->real_num_tx_queues > 1) { netif_set_real_num_tx_queues(mgp->dev, 1); cmd.data0 = mgp->num_slices; cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE; status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES, &cmd, 0); } if (status != 0) { dev_err(&mgp->pdev->dev, "failed to set number of slices\n"); return status; } } for (i = 0; i < mgp->num_slices; i++) { ss = &mgp->ss[i]; cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->rx_done.bus); cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->rx_done.bus); cmd.data2 = i; status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA, &cmd, 0); } status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0); for (i = 0; i < mgp->num_slices; i++) { ss = &mgp->ss[i]; ss->irq_claim = (__iomem __be32 *) (mgp->sram + cmd.data0 + 8 * i); } status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET, &cmd, 0); mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0); status |= myri10ge_send_cmd (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0); mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0); if (status != 0) { dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n"); return status; } put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr); #ifdef CONFIG_MYRI10GE_DCA status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_DCA_OFFSET, &cmd, 0); dca_tag_off = cmd.data0; for (i = 0; i < mgp->num_slices; i++) { ss = &mgp->ss[i]; if (status == 0) { ss->dca_tag = (__iomem __be32 *) (mgp->sram + dca_tag_off + 4 * i); } else { ss->dca_tag = NULL; } } #endif /* CONFIG_MYRI10GE_DCA */ /* reset mcp/driver shared state back to 0 */ mgp->link_changes = 0; for (i = 0; i < mgp->num_slices; i++) { ss = &mgp->ss[i]; memset(ss->rx_done.entry, 0, bytes); ss->tx.req = 0; ss->tx.done = 0; ss->tx.pkt_start = 0; ss->tx.pkt_done = 0; ss->rx_big.cnt = 0; ss->rx_small.cnt = 0; ss->rx_done.idx = 0; ss->rx_done.cnt = 0; ss->tx.wake_queue = 0; ss->tx.stop_queue = 0; } status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr); myri10ge_change_pause(mgp, mgp->pause); myri10ge_set_multicast_list(mgp->dev); return status; } #ifdef CONFIG_MYRI10GE_DCA static int myri10ge_toggle_relaxed(struct pci_dev *pdev, int on) { int ret; u16 ctl; pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &ctl); ret = (ctl & PCI_EXP_DEVCTL_RELAX_EN) >> 4; if (ret != on) { ctl &= ~PCI_EXP_DEVCTL_RELAX_EN; ctl |= (on << 4); pcie_capability_write_word(pdev, PCI_EXP_DEVCTL, ctl); } return ret; } static void myri10ge_write_dca(struct myri10ge_slice_state *ss, int cpu, int tag) { ss->cached_dca_tag = tag; put_be32(htonl(tag), ss->dca_tag); } static inline void myri10ge_update_dca(struct myri10ge_slice_state *ss) { int cpu = get_cpu(); int tag; if (cpu != ss->cpu) { tag = dca3_get_tag(&ss->mgp->pdev->dev, cpu); if (ss->cached_dca_tag != tag) myri10ge_write_dca(ss, cpu, tag); ss->cpu = cpu; } put_cpu(); } static void myri10ge_setup_dca(struct myri10ge_priv *mgp) { int err, i; struct pci_dev *pdev = mgp->pdev; if (mgp->ss[0].dca_tag == NULL || mgp->dca_enabled) return; if (!myri10ge_dca) { dev_err(&pdev->dev, "dca disabled by administrator\n"); return; } err = dca_add_requester(&pdev->dev); if (err) { if (err != -ENODEV) dev_err(&pdev->dev, "dca_add_requester() failed, err=%d\n", err); return; } mgp->relaxed_order = myri10ge_toggle_relaxed(pdev, 0); mgp->dca_enabled = 1; for (i = 0; i < mgp->num_slices; i++) { mgp->ss[i].cpu = -1; mgp->ss[i].cached_dca_tag = -1; myri10ge_update_dca(&mgp->ss[i]); } } static void myri10ge_teardown_dca(struct myri10ge_priv *mgp) { struct pci_dev *pdev = mgp->pdev; if (!mgp->dca_enabled) return; mgp->dca_enabled = 0; if (mgp->relaxed_order) myri10ge_toggle_relaxed(pdev, 1); dca_remove_requester(&pdev->dev); } static int myri10ge_notify_dca_device(struct device *dev, void *data) { struct myri10ge_priv *mgp; unsigned long event; mgp = dev_get_drvdata(dev); event = *(unsigned long *)data; if (event == DCA_PROVIDER_ADD) myri10ge_setup_dca(mgp); else if (event == DCA_PROVIDER_REMOVE) myri10ge_teardown_dca(mgp); return 0; } #endif /* CONFIG_MYRI10GE_DCA */ static inline void myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst, struct mcp_kreq_ether_recv *src) { __be32 low; low = src->addr_low; src->addr_low = htonl(DMA_BIT_MASK(32)); myri10ge_pio_copy(dst, src, 4 * sizeof(*src)); mb(); myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src)); mb(); src->addr_low = low; put_be32(low, &dst->addr_low); mb(); } static void myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx, int bytes, int watchdog) { struct page *page; dma_addr_t bus; int idx; #if MYRI10GE_ALLOC_SIZE > 4096 int end_offset; #endif if (unlikely(rx->watchdog_needed && !watchdog)) return; /* try to refill entire ring */ while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) { idx = rx->fill_cnt & rx->mask; if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) { /* we can use part of previous page */ get_page(rx->page); } else { /* we need a new page */ page = alloc_pages(GFP_ATOMIC | __GFP_COMP, MYRI10GE_ALLOC_ORDER); if (unlikely(page == NULL)) { if (rx->fill_cnt - rx->cnt < 16) rx->watchdog_needed = 1; return; } bus = dma_map_page(&mgp->pdev->dev, page, 0, MYRI10GE_ALLOC_SIZE, DMA_FROM_DEVICE); if (unlikely(dma_mapping_error(&mgp->pdev->dev, bus))) { __free_pages(page, MYRI10GE_ALLOC_ORDER); if (rx->fill_cnt - rx->cnt < 16) rx->watchdog_needed = 1; return; } rx->page = page; rx->page_offset = 0; rx->bus = bus; } rx->info[idx].page = rx->page; rx->info[idx].page_offset = rx->page_offset; /* note that this is the address of the start of the * page */ dma_unmap_addr_set(&rx->info[idx], bus, rx->bus); rx->shadow[idx].addr_low = htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset); rx->shadow[idx].addr_high = htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus)); /* start next packet on a cacheline boundary */ rx->page_offset += SKB_DATA_ALIGN(bytes); #if MYRI10GE_ALLOC_SIZE > 4096 /* don't cross a 4KB boundary */ end_offset = rx->page_offset + bytes - 1; if ((unsigned)(rx->page_offset ^ end_offset) > 4095) rx->page_offset = end_offset & ~4095; #endif rx->fill_cnt++; /* copy 8 descriptors to the firmware at a time */ if ((idx & 7) == 7) { myri10ge_submit_8rx(&rx->lanai[idx - 7], &rx->shadow[idx - 7]); } } } static inline void myri10ge_unmap_rx_page(struct pci_dev *pdev, struct myri10ge_rx_buffer_state *info, int bytes) { /* unmap the recvd page if we're the only or last user of it */ if (bytes >= MYRI10GE_ALLOC_SIZE / 2 || (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) { dma_unmap_page(&pdev->dev, (dma_unmap_addr(info, bus) & ~(MYRI10GE_ALLOC_SIZE - 1)), MYRI10GE_ALLOC_SIZE, DMA_FROM_DEVICE); } } /* * GRO does not support acceleration of tagged vlan frames, and * this NIC does not support vlan tag offload, so we must pop * the tag ourselves to be able to achieve GRO performance that * is comparable to LRO. */ static inline void myri10ge_vlan_rx(struct net_device *dev, void *addr, struct sk_buff *skb) { u8 *va; struct vlan_ethhdr *veh; skb_frag_t *frag; __wsum vsum; va = addr; va += MXGEFW_PAD; veh = (struct vlan_ethhdr *)va; if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) == NETIF_F_HW_VLAN_CTAG_RX && veh->h_vlan_proto == htons(ETH_P_8021Q)) { /* fixup csum if needed */ if (skb->ip_summed == CHECKSUM_COMPLETE) { vsum = csum_partial(va + ETH_HLEN, VLAN_HLEN, 0); skb->csum = csum_sub(skb->csum, vsum); } /* pop tag */ __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(veh->h_vlan_TCI)); memmove(va + VLAN_HLEN, va, 2 * ETH_ALEN); skb->len -= VLAN_HLEN; skb->data_len -= VLAN_HLEN; frag = skb_shinfo(skb)->frags; skb_frag_off_add(frag, VLAN_HLEN); skb_frag_size_sub(frag, VLAN_HLEN); } } #define MYRI10GE_HLEN 64 /* Bytes to copy from page to skb linear memory */ static inline int myri10ge_rx_done(struct myri10ge_slice_state *ss, int len, __wsum csum) { struct myri10ge_priv *mgp = ss->mgp; struct sk_buff *skb; skb_frag_t *rx_frags; struct myri10ge_rx_buf *rx; int i, idx, remainder, bytes; struct pci_dev *pdev = mgp->pdev; struct net_device *dev = mgp->dev; u8 *va; if (len <= mgp->small_bytes) { rx = &ss->rx_small; bytes = mgp->small_bytes; } else { rx = &ss->rx_big; bytes = mgp->big_bytes; } len += MXGEFW_PAD; idx = rx->cnt & rx->mask; va = page_address(rx->info[idx].page) + rx->info[idx].page_offset; prefetch(va); skb = napi_get_frags(&ss->napi); if (unlikely(skb == NULL)) { ss->stats.rx_dropped++; for (i = 0, remainder = len; remainder > 0; i++) { myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes); put_page(rx->info[idx].page); rx->cnt++; idx = rx->cnt & rx->mask; remainder -= MYRI10GE_ALLOC_SIZE; } return 0; } rx_frags = skb_shinfo(skb)->frags; /* Fill skb_frag_t(s) with data from our receive */ for (i = 0, remainder = len; remainder > 0; i++) { myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes); skb_fill_page_desc(skb, i, rx->info[idx].page, rx->info[idx].page_offset, remainder < MYRI10GE_ALLOC_SIZE ? remainder : MYRI10GE_ALLOC_SIZE); rx->cnt++; idx = rx->cnt & rx->mask; remainder -= MYRI10GE_ALLOC_SIZE; } /* remove padding */ skb_frag_off_add(&rx_frags[0], MXGEFW_PAD); skb_frag_size_sub(&rx_frags[0], MXGEFW_PAD); len -= MXGEFW_PAD; skb->len = len; skb->data_len = len; skb->truesize += len; if (dev->features & NETIF_F_RXCSUM) { skb->ip_summed = CHECKSUM_COMPLETE; skb->csum = csum; } myri10ge_vlan_rx(mgp->dev, va, skb); skb_record_rx_queue(skb, ss - &mgp->ss[0]); napi_gro_frags(&ss->napi); return 1; } static inline void myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index) { struct pci_dev *pdev = ss->mgp->pdev; struct myri10ge_tx_buf *tx = &ss->tx; struct netdev_queue *dev_queue; struct sk_buff *skb; int idx, len; while (tx->pkt_done != mcp_index) { idx = tx->done & tx->mask; skb = tx->info[idx].skb; /* Mark as free */ tx->info[idx].skb = NULL; if (tx->info[idx].last) { tx->pkt_done++; tx->info[idx].last = 0; } tx->done++; len = dma_unmap_len(&tx->info[idx], len); dma_unmap_len_set(&tx->info[idx], len, 0); if (skb) { ss->stats.tx_bytes += skb->len; ss->stats.tx_packets++; dev_consume_skb_irq(skb); if (len) dma_unmap_single(&pdev->dev, dma_unmap_addr(&tx->info[idx], bus), len, DMA_TO_DEVICE); } else { if (len) dma_unmap_page(&pdev->dev, dma_unmap_addr(&tx->info[idx], bus), len, DMA_TO_DEVICE); } } dev_queue = netdev_get_tx_queue(ss->dev, ss - ss->mgp->ss); /* * Make a minimal effort to prevent the NIC from polling an * idle tx queue. If we can't get the lock we leave the queue * active. In this case, either a thread was about to start * using the queue anyway, or we lost a race and the NIC will * waste some of its resources polling an inactive queue for a * while. */ if ((ss->mgp->dev->real_num_tx_queues > 1) && __netif_tx_trylock(dev_queue)) { if (tx->req == tx->done) { tx->queue_active = 0; put_be32(htonl(1), tx->send_stop); mb(); } __netif_tx_unlock(dev_queue); } /* start the queue if we've stopped it */ if (netif_tx_queue_stopped(dev_queue) && tx->req - tx->done < (tx->mask >> 1) && ss->mgp->running == MYRI10GE_ETH_RUNNING) { tx->wake_queue++; netif_tx_wake_queue(dev_queue); } } static inline int myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget) { struct myri10ge_rx_done *rx_done = &ss->rx_done; struct myri10ge_priv *mgp = ss->mgp; unsigned long rx_bytes = 0; unsigned long rx_packets = 0; unsigned long rx_ok; int idx = rx_done->idx; int cnt = rx_done->cnt; int work_done = 0; u16 length; __wsum checksum; while (rx_done->entry[idx].length != 0 && work_done < budget) { length = ntohs(rx_done->entry[idx].length); rx_done->entry[idx].length = 0; checksum = csum_unfold(rx_done->entry[idx].checksum); rx_ok = myri10ge_rx_done(ss, length, checksum); rx_packets += rx_ok; rx_bytes += rx_ok * (unsigned long)length; cnt++; idx = cnt & (mgp->max_intr_slots - 1); work_done++; } rx_done->idx = idx; rx_done->cnt = cnt; ss->stats.rx_packets += rx_packets; ss->stats.rx_bytes += rx_bytes; /* restock receive rings if needed */ if (ss->rx_small.fill_cnt - ss->rx_small.cnt < myri10ge_fill_thresh) myri10ge_alloc_rx_pages(mgp, &ss->rx_small, mgp->small_bytes + MXGEFW_PAD, 0); if (ss->rx_big.fill_cnt - ss->rx_big.cnt < myri10ge_fill_thresh) myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0); return work_done; } static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp) { struct mcp_irq_data *stats = mgp->ss[0].fw_stats; if (unlikely(stats->stats_updated)) { unsigned link_up = ntohl(stats->link_up); if (mgp->link_state != link_up) { mgp->link_state = link_up; if (mgp->link_state == MXGEFW_LINK_UP) { netif_info(mgp, link, mgp->dev, "link up\n"); netif_carrier_on(mgp->dev); mgp->link_changes++; } else { netif_info(mgp, link, mgp->dev, "link %s\n", (link_up == MXGEFW_LINK_MYRINET ? "mismatch (Myrinet detected)" : "down")); netif_carrier_off(mgp->dev); mgp->link_changes++; } } if (mgp->rdma_tags_available != ntohl(stats->rdma_tags_available)) { mgp->rdma_tags_available = ntohl(stats->rdma_tags_available); netdev_warn(mgp->dev, "RDMA timed out! %d tags left\n", mgp->rdma_tags_available); } mgp->down_cnt += stats->link_down; if (stats->link_down) wake_up(&mgp->down_wq); } } static int myri10ge_poll(struct napi_struct *napi, int budget) { struct myri10ge_slice_state *ss = container_of(napi, struct myri10ge_slice_state, napi); int work_done; #ifdef CONFIG_MYRI10GE_DCA if (ss->mgp->dca_enabled) myri10ge_update_dca(ss); #endif /* process as many rx events as NAPI will allow */ work_done = myri10ge_clean_rx_done(ss, budget); if (work_done < budget) { napi_complete_done(napi, work_done); put_be32(htonl(3), ss->irq_claim); } return work_done; } static irqreturn_t myri10ge_intr(int irq, void *arg) { struct myri10ge_slice_state *ss = arg; struct myri10ge_priv *mgp = ss->mgp; struct mcp_irq_data *stats = ss->fw_stats; struct myri10ge_tx_buf *tx = &ss->tx; u32 send_done_count; int i; /* an interrupt on a non-zero receive-only slice is implicitly * valid since MSI-X irqs are not shared */ if ((mgp->dev->real_num_tx_queues == 1) && (ss != mgp->ss)) { napi_schedule(&ss->napi); return IRQ_HANDLED; } /* make sure it is our IRQ, and that the DMA has finished */ if (unlikely(!stats->valid)) return IRQ_NONE; /* low bit indicates receives are present, so schedule * napi poll handler */ if (stats->valid & 1) napi_schedule(&ss->napi); if (!mgp->msi_enabled && !mgp->msix_enabled) { put_be32(0, mgp->irq_deassert); if (!myri10ge_deassert_wait) stats->valid = 0; mb(); } else stats->valid = 0; /* Wait for IRQ line to go low, if using INTx */ i = 0; while (1) { i++; /* check for transmit completes and receives */ send_done_count = ntohl(stats->send_done_count); if (send_done_count != tx->pkt_done) myri10ge_tx_done(ss, (int)send_done_count); if (unlikely(i > myri10ge_max_irq_loops)) { netdev_warn(mgp->dev, "irq stuck?\n"); stats->valid = 0; schedule_work(&mgp->watchdog_work); } if (likely(stats->valid == 0)) break; cpu_relax(); barrier(); } /* Only slice 0 updates stats */ if (ss == mgp->ss) myri10ge_check_statblock(mgp); put_be32(htonl(3), ss->irq_claim + 1); return IRQ_HANDLED; } static int myri10ge_get_link_ksettings(struct net_device *netdev, struct ethtool_link_ksettings *cmd) { struct myri10ge_priv *mgp = netdev_priv(netdev); char *ptr; int i; cmd->base.autoneg = AUTONEG_DISABLE; cmd->base.speed = SPEED_10000; cmd->base.duplex = DUPLEX_FULL; /* * parse the product code to deterimine the interface type * (CX4, XFP, Quad Ribbon Fiber) by looking at the character * after the 3rd dash in the driver's cached copy of the * EEPROM's product code string. */ ptr = mgp->product_code_string; if (ptr == NULL) { netdev_err(netdev, "Missing product code\n"); return 0; } for (i = 0; i < 3; i++, ptr++) { ptr = strchr(ptr, '-'); if (ptr == NULL) { netdev_err(netdev, "Invalid product code %s\n", mgp->product_code_string); return 0; } } if (*ptr == '2') ptr++; if (*ptr == 'R' || *ptr == 'Q' || *ptr == 'S') { /* We've found either an XFP, quad ribbon fiber, or SFP+ */ cmd->base.port = PORT_FIBRE; ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE); ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE); } else { cmd->base.port = PORT_OTHER; } return 0; } static void myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info) { struct myri10ge_priv *mgp = netdev_priv(netdev); strscpy(info->driver, "myri10ge", sizeof(info->driver)); strscpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version)); strscpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version)); strscpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info)); } static int myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal, struct kernel_ethtool_coalesce *kernel_coal, struct netlink_ext_ack *extack) { struct myri10ge_priv *mgp = netdev_priv(netdev); coal->rx_coalesce_usecs = mgp->intr_coal_delay; return 0; } static int myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal, struct kernel_ethtool_coalesce *kernel_coal, struct netlink_ext_ack *extack) { struct myri10ge_priv *mgp = netdev_priv(netdev); mgp->intr_coal_delay = coal->rx_coalesce_usecs; put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr); return 0; } static void myri10ge_get_pauseparam(struct net_device *netdev, struct ethtool_pauseparam *pause) { struct myri10ge_priv *mgp = netdev_priv(netdev); pause->autoneg = 0; pause->rx_pause = mgp->pause; pause->tx_pause = mgp->pause; } static int myri10ge_set_pauseparam(struct net_device *netdev, struct ethtool_pauseparam *pause) { struct myri10ge_priv *mgp = netdev_priv(netdev); if (pause->tx_pause != mgp->pause) return myri10ge_change_pause(mgp, pause->tx_pause); if (pause->rx_pause != mgp->pause) return myri10ge_change_pause(mgp, pause->rx_pause); if (pause->autoneg != 0) return -EINVAL; return 0; } static void myri10ge_get_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring, struct kernel_ethtool_ringparam *kernel_ring, struct netlink_ext_ack *extack) { struct myri10ge_priv *mgp = netdev_priv(netdev); ring->rx_mini_max_pending = mgp->ss[0].rx_small.mask + 1; ring->rx_max_pending = mgp->ss[0].rx_big.mask + 1; ring->rx_jumbo_max_pending = 0; ring->tx_max_pending = mgp->ss[0].tx.mask + 1; ring->rx_mini_pending = ring->rx_mini_max_pending; ring->rx_pending = ring->rx_max_pending; ring->rx_jumbo_pending = ring->rx_jumbo_max_pending; ring->tx_pending = ring->tx_max_pending; } static const char myri10ge_gstrings_main_stats[][ETH_GSTRING_LEN] = { "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors", "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions", "rx_length_errors", "rx_over_errors", "rx_crc_errors", "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors", "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors", "tx_heartbeat_errors", "tx_window_errors", /* device-specific stats */ "tx_boundary", "irq", "MSI", "MSIX", "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs", "serial_number", "watchdog_resets", #ifdef CONFIG_MYRI10GE_DCA "dca_capable_firmware", "dca_device_present", #endif "link_changes", "link_up", "dropped_link_overflow", "dropped_link_error_or_filtered", "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32", "dropped_unicast_filtered", "dropped_multicast_filtered", "dropped_runt", "dropped_overrun", "dropped_no_small_buffer", "dropped_no_big_buffer" }; static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = { "----------- slice ---------", "tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done", "rx_small_cnt", "rx_big_cnt", "wake_queue", "stop_queue", "tx_linearized", }; #define MYRI10GE_NET_STATS_LEN 21 #define MYRI10GE_MAIN_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_main_stats) #define MYRI10GE_SLICE_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_slice_stats) static void myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data) { struct myri10ge_priv *mgp = netdev_priv(netdev); int i; switch (stringset) { case ETH_SS_STATS: memcpy(data, *myri10ge_gstrings_main_stats, sizeof(myri10ge_gstrings_main_stats)); data += sizeof(myri10ge_gstrings_main_stats); for (i = 0; i < mgp->num_slices; i++) { memcpy(data, *myri10ge_gstrings_slice_stats, sizeof(myri10ge_gstrings_slice_stats)); data += sizeof(myri10ge_gstrings_slice_stats); } break; } } static int myri10ge_get_sset_count(struct net_device *netdev, int sset) { struct myri10ge_priv *mgp = netdev_priv(netdev); switch (sset) { case ETH_SS_STATS: return MYRI10GE_MAIN_STATS_LEN + mgp->num_slices * MYRI10GE_SLICE_STATS_LEN; default: return -EOPNOTSUPP; } } static void myri10ge_get_ethtool_stats(struct net_device *netdev, struct ethtool_stats *stats, u64 * data) { struct myri10ge_priv *mgp = netdev_priv(netdev); struct myri10ge_slice_state *ss; struct rtnl_link_stats64 link_stats; int slice; int i; /* force stats update */ memset(&link_stats, 0, sizeof(link_stats)); (void)myri10ge_get_stats(netdev, &link_stats); for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++) data[i] = ((u64 *)&link_stats)[i]; data[i++] = (unsigned int)mgp->tx_boundary; data[i++] = (unsigned int)mgp->pdev->irq; data[i++] = (unsigned int)mgp->msi_enabled; data[i++] = (unsigned int)mgp->msix_enabled; data[i++] = (unsigned int)mgp->read_dma; data[i++] = (unsigned int)mgp->write_dma; data[i++] = (unsigned int)mgp->read_write_dma; data[i++] = (unsigned int)mgp->serial_number; data[i++] = (unsigned int)mgp->watchdog_resets; #ifdef CONFIG_MYRI10GE_DCA data[i++] = (unsigned int)(mgp->ss[0].dca_tag != NULL); data[i++] = (unsigned int)(mgp->dca_enabled); #endif data[i++] = (unsigned int)mgp->link_changes; /* firmware stats are useful only in the first slice */ ss = &mgp->ss[0]; data[i++] = (unsigned int)ntohl(ss->fw_stats->link_up); data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_overflow); data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_error_or_filtered); data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_pause); data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_phy); data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_crc32); data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_unicast_filtered); data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_multicast_filtered); data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_runt); data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_overrun); data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_small_buffer); data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_big_buffer); for (slice = 0; slice < mgp->num_slices; slice++) { ss = &mgp->ss[slice]; data[i++] = slice; data[i++] = (unsigned int)ss->tx.pkt_start; data[i++] = (unsigned int)ss->tx.pkt_done; data[i++] = (unsigned int)ss->tx.req; data[i++] = (unsigned int)ss->tx.done; data[i++] = (unsigned int)ss->rx_small.cnt; data[i++] = (unsigned int)ss->rx_big.cnt; data[i++] = (unsigned int)ss->tx.wake_queue; data[i++] = (unsigned int)ss->tx.stop_queue; data[i++] = (unsigned int)ss->tx.linearized; } } static void myri10ge_set_msglevel(struct net_device *netdev, u32 value) { struct myri10ge_priv *mgp = netdev_priv(netdev); mgp->msg_enable = value; } static u32 myri10ge_get_msglevel(struct net_device *netdev) { struct myri10ge_priv *mgp = netdev_priv(netdev); return mgp->msg_enable; } /* * Use a low-level command to change the LED behavior. Rather than * blinking (which is the normal case), when identify is used, the * yellow LED turns solid. */ static int myri10ge_led(struct myri10ge_priv *mgp, int on) { struct mcp_gen_header *hdr; struct device *dev = &mgp->pdev->dev; size_t hdr_off, pattern_off, hdr_len; u32 pattern = 0xfffffffe; /* find running firmware header */ hdr_off = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET)); if ((hdr_off & 3) || hdr_off + sizeof(*hdr) > mgp->sram_size) { dev_err(dev, "Running firmware has bad header offset (%d)\n", (int)hdr_off); return -EIO; } hdr_len = swab32(readl(mgp->sram + hdr_off + offsetof(struct mcp_gen_header, header_length))); pattern_off = hdr_off + offsetof(struct mcp_gen_header, led_pattern); if (pattern_off >= (hdr_len + hdr_off)) { dev_info(dev, "Firmware does not support LED identification\n"); return -EINVAL; } if (!on) pattern = swab32(readl(mgp->sram + pattern_off + 4)); writel(swab32(pattern), mgp->sram + pattern_off); return 0; } static int myri10ge_phys_id(struct net_device *netdev, enum ethtool_phys_id_state state) { struct myri10ge_priv *mgp = netdev_priv(netdev); int rc; switch (state) { case ETHTOOL_ID_ACTIVE: rc = myri10ge_led(mgp, 1); break; case ETHTOOL_ID_INACTIVE: rc = myri10ge_led(mgp, 0); break; default: rc = -EINVAL; } return rc; } static const struct ethtool_ops myri10ge_ethtool_ops = { .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS, .get_drvinfo = myri10ge_get_drvinfo, .get_coalesce = myri10ge_get_coalesce, .set_coalesce = myri10ge_set_coalesce, .get_pauseparam = myri10ge_get_pauseparam, .set_pauseparam = myri10ge_set_pauseparam, .get_ringparam = myri10ge_get_ringparam, .get_link = ethtool_op_get_link, .get_strings = myri10ge_get_strings, .get_sset_count = myri10ge_get_sset_count, .get_ethtool_stats = myri10ge_get_ethtool_stats, .set_msglevel = myri10ge_set_msglevel, .get_msglevel = myri10ge_get_msglevel, .set_phys_id = myri10ge_phys_id, .get_link_ksettings = myri10ge_get_link_ksettings, }; static int myri10ge_allocate_rings(struct myri10ge_slice_state *ss) { struct myri10ge_priv *mgp = ss->mgp; struct myri10ge_cmd cmd; struct net_device *dev = mgp->dev; int tx_ring_size, rx_ring_size; int tx_ring_entries, rx_ring_entries; int i, slice, status; size_t bytes; /* get ring sizes */ slice = ss - mgp->ss; cmd.data0 = slice; status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0); tx_ring_size = cmd.data0; cmd.data0 = slice; status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0); if (status != 0) return status; rx_ring_size = cmd.data0; tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send); rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr); ss->tx.mask = tx_ring_entries - 1; ss->rx_small.mask = ss->rx_big.mask = rx_ring_entries - 1; status = -ENOMEM; /* allocate the host shadow rings */ bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4) * sizeof(*ss->tx.req_list); ss->tx.req_bytes = kzalloc(bytes, GFP_KERNEL); if (ss->tx.req_bytes == NULL) goto abort_with_nothing; /* ensure req_list entries are aligned to 8 bytes */ ss->tx.req_list = (struct mcp_kreq_ether_send *) ALIGN((unsigned long)ss->tx.req_bytes, 8); ss->tx.queue_active = 0; bytes = rx_ring_entries * sizeof(*ss->rx_small.shadow); ss->rx_small.shadow = kzalloc(bytes, GFP_KERNEL); if (ss->rx_small.shadow == NULL) goto abort_with_tx_req_bytes; bytes = rx_ring_entries * sizeof(*ss->rx_big.shadow); ss->rx_big.shadow = kzalloc(bytes, GFP_KERNEL); if (ss->rx_big.shadow == NULL) goto abort_with_rx_small_shadow; /* allocate the host info rings */ bytes = tx_ring_entries * sizeof(*ss->tx.info); ss->tx.info = kzalloc(bytes, GFP_KERNEL); if (ss->tx.info == NULL) goto abort_with_rx_big_shadow; bytes = rx_ring_entries * sizeof(*ss->rx_small.info); ss->rx_small.info = kzalloc(bytes, GFP_KERNEL); if (ss->rx_small.info == NULL) goto abort_with_tx_info; bytes = rx_ring_entries * sizeof(*ss->rx_big.info); ss->rx_big.info = kzalloc(bytes, GFP_KERNEL); if (ss->rx_big.info == NULL) goto abort_with_rx_small_info; /* Fill the receive rings */ ss->rx_big.cnt = 0; ss->rx_small.cnt = 0; ss->rx_big.fill_cnt = 0; ss->rx_small.fill_cnt = 0; ss->rx_small.page_offset = MYRI10GE_ALLOC_SIZE; ss->rx_big.page_offset = MYRI10GE_ALLOC_SIZE; ss->rx_small.watchdog_needed = 0; ss->rx_big.watchdog_needed = 0; if (mgp->small_bytes == 0) { ss->rx_small.fill_cnt = ss->rx_small.mask + 1; } else { myri10ge_alloc_rx_pages(mgp, &ss->rx_small, mgp->small_bytes + MXGEFW_PAD, 0); } if (ss->rx_small.fill_cnt < ss->rx_small.mask + 1) { netdev_err(dev, "slice-%d: alloced only %d small bufs\n", slice, ss->rx_small.fill_cnt); goto abort_with_rx_small_ring; } myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0); if (ss->rx_big.fill_cnt < ss->rx_big.mask + 1) { netdev_err(dev, "slice-%d: alloced only %d big bufs\n", slice, ss->rx_big.fill_cnt); goto abort_with_rx_big_ring; } return 0; abort_with_rx_big_ring: for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) { int idx = i & ss->rx_big.mask; myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx], mgp->big_bytes); put_page(ss->rx_big.info[idx].page); } abort_with_rx_small_ring: if (mgp->small_bytes == 0) ss->rx_small.fill_cnt = ss->rx_small.cnt; for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) { int idx = i & ss->rx_small.mask; myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx], mgp->small_bytes + MXGEFW_PAD); put_page(ss->rx_small.info[idx].page); } kfree(ss->rx_big.info); abort_with_rx_small_info: kfree(ss->rx_small.info); abort_with_tx_info: kfree(ss->tx.info); abort_with_rx_big_shadow: kfree(ss->rx_big.shadow); abort_with_rx_small_shadow: kfree(ss->rx_small.shadow); abort_with_tx_req_bytes: kfree(ss->tx.req_bytes); ss->tx.req_bytes = NULL; ss->tx.req_list = NULL; abort_with_nothing: return status; } static void myri10ge_free_rings(struct myri10ge_slice_state *ss) { struct myri10ge_priv *mgp = ss->mgp; struct sk_buff *skb; struct myri10ge_tx_buf *tx; int i, len, idx; /* If not allocated, skip it */ if (ss->tx.req_list == NULL) return; for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) { idx = i & ss->rx_big.mask; if (i == ss->rx_big.fill_cnt - 1) ss->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE; myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx], mgp->big_bytes); put_page(ss->rx_big.info[idx].page); } if (mgp->small_bytes == 0) ss->rx_small.fill_cnt = ss->rx_small.cnt; for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) { idx = i & ss->rx_small.mask; if (i == ss->rx_small.fill_cnt - 1) ss->rx_small.info[idx].page_offset = MYRI10GE_ALLOC_SIZE; myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx], mgp->small_bytes + MXGEFW_PAD); put_page(ss->rx_small.info[idx].page); } tx = &ss->tx; while (tx->done != tx->req) { idx = tx->done & tx->mask; skb = tx->info[idx].skb; /* Mark as free */ tx->info[idx].skb = NULL; tx->done++; len = dma_unmap_len(&tx->info[idx], len); dma_unmap_len_set(&tx->info[idx], len, 0); if (skb) { ss->stats.tx_dropped++; dev_kfree_skb_any(skb); if (len) dma_unmap_single(&mgp->pdev->dev, dma_unmap_addr(&tx->info[idx], bus), len, DMA_TO_DEVICE); } else { if (len) dma_unmap_page(&mgp->pdev->dev, dma_unmap_addr(&tx->info[idx], bus), len, DMA_TO_DEVICE); } } kfree(ss->rx_big.info); kfree(ss->rx_small.info); kfree(ss->tx.info); kfree(ss->rx_big.shadow); kfree(ss->rx_small.shadow); kfree(ss->tx.req_bytes); ss->tx.req_bytes = NULL; ss->tx.req_list = NULL; } static int myri10ge_request_irq(struct myri10ge_priv *mgp) { struct pci_dev *pdev = mgp->pdev; struct myri10ge_slice_state *ss; struct net_device *netdev = mgp->dev; int i; int status; mgp->msi_enabled = 0; mgp->msix_enabled = 0; status = 0; if (myri10ge_msi) { if (mgp->num_slices > 1) { status = pci_enable_msix_range(pdev, mgp->msix_vectors, mgp->num_slices, mgp->num_slices); if (status < 0) { dev_err(&pdev->dev, "Error %d setting up MSI-X\n", status); return status; } mgp->msix_enabled = 1; } if (mgp->msix_enabled == 0) { status = pci_enable_msi(pdev); if (status != 0) { dev_err(&pdev->dev, "Error %d setting up MSI; falling back to xPIC\n", status); } else { mgp->msi_enabled = 1; } } } if (mgp->msix_enabled) { for (i = 0; i < mgp->num_slices; i++) { ss = &mgp->ss[i]; snprintf(ss->irq_desc, sizeof(ss->irq_desc), "%s:slice-%d", netdev->name, i); status = request_irq(mgp->msix_vectors[i].vector, myri10ge_intr, 0, ss->irq_desc, ss); if (status != 0) { dev_err(&pdev->dev, "slice %d failed to allocate IRQ\n", i); i--; while (i >= 0) { free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]); i--; } pci_disable_msix(pdev); return status; } } } else { status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED, mgp->dev->name, &mgp->ss[0]); if (status != 0) { dev_err(&pdev->dev, "failed to allocate IRQ\n"); if (mgp->msi_enabled) pci_disable_msi(pdev); } } return status; } static void myri10ge_free_irq(struct myri10ge_priv *mgp) { struct pci_dev *pdev = mgp->pdev; int i; if (mgp->msix_enabled) { for (i = 0; i < mgp->num_slices; i++) free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]); } else { free_irq(pdev->irq, &mgp->ss[0]); } if (mgp->msi_enabled) pci_disable_msi(pdev); if (mgp->msix_enabled) pci_disable_msix(pdev); } static int myri10ge_get_txrx(struct myri10ge_priv *mgp, int slice) { struct myri10ge_cmd cmd; struct myri10ge_slice_state *ss; int status; ss = &mgp->ss[slice]; status = 0; if (slice == 0 || (mgp->dev->real_num_tx_queues > 1)) { cmd.data0 = slice; status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET, &cmd, 0); ss->tx.lanai = (struct mcp_kreq_ether_send __iomem *) (mgp->sram + cmd.data0); } cmd.data0 = slice; status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET, &cmd, 0); ss->rx_small.lanai = (struct mcp_kreq_ether_recv __iomem *) (mgp->sram + cmd.data0); cmd.data0 = slice; status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0); ss->rx_big.lanai = (struct mcp_kreq_ether_recv __iomem *) (mgp->sram + cmd.data0); ss->tx.send_go = (__iomem __be32 *) (mgp->sram + MXGEFW_ETH_SEND_GO + 64 * slice); ss->tx.send_stop = (__iomem __be32 *) (mgp->sram + MXGEFW_ETH_SEND_STOP + 64 * slice); return status; } static int myri10ge_set_stats(struct myri10ge_priv *mgp, int slice) { struct myri10ge_cmd cmd; struct myri10ge_slice_state *ss; int status; ss = &mgp->ss[slice]; cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->fw_stats_bus); cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->fw_stats_bus); cmd.data2 = sizeof(struct mcp_irq_data) | (slice << 16); status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0); if (status == -ENOSYS) { dma_addr_t bus = ss->fw_stats_bus; if (slice != 0) return -EINVAL; bus += offsetof(struct mcp_irq_data, send_done_count); cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus); cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus); status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_OBSOLETE, &cmd, 0); /* Firmware cannot support multicast without STATS_DMA_V2 */ mgp->fw_multicast_support = 0; } else { mgp->fw_multicast_support = 1; } return 0; } static int myri10ge_open(struct net_device *dev) { struct myri10ge_slice_state *ss; struct myri10ge_priv *mgp = netdev_priv(dev); struct myri10ge_cmd cmd; int i, status, big_pow2, slice; u8 __iomem *itable; if (mgp->running != MYRI10GE_ETH_STOPPED) return -EBUSY; mgp->running = MYRI10GE_ETH_STARTING; status = myri10ge_reset(mgp); if (status != 0) { netdev_err(dev, "failed reset\n"); goto abort_with_nothing; } if (mgp->num_slices > 1) { cmd.data0 = mgp->num_slices; cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE; if (mgp->dev->real_num_tx_queues > 1) cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES; status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES, &cmd, 0); if (status != 0) { netdev_err(dev, "failed to set number of slices\n"); goto abort_with_nothing; } /* setup the indirection table */ cmd.data0 = mgp->num_slices; status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_TABLE_SIZE, &cmd, 0); status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RSS_TABLE_OFFSET, &cmd, 0); if (status != 0) { netdev_err(dev, "failed to setup rss tables\n"); goto abort_with_nothing; } /* just enable an identity mapping */ itable = mgp->sram + cmd.data0; for (i = 0; i < mgp->num_slices; i++) __raw_writeb(i, &itable[i]); cmd.data0 = 1; cmd.data1 = myri10ge_rss_hash; status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_ENABLE, &cmd, 0); if (status != 0) { netdev_err(dev, "failed to enable slices\n"); goto abort_with_nothing; } } status = myri10ge_request_irq(mgp); if (status != 0) goto abort_with_nothing; /* decide what small buffer size to use. For good TCP rx * performance, it is important to not receive 1514 byte * frames into jumbo buffers, as it confuses the socket buffer * accounting code, leading to drops and erratic performance. */ if (dev->mtu <= ETH_DATA_LEN) /* enough for a TCP header */ mgp->small_bytes = (128 > SMP_CACHE_BYTES) ? (128 - MXGEFW_PAD) : (SMP_CACHE_BYTES - MXGEFW_PAD); else /* enough for a vlan encapsulated ETH_DATA_LEN frame */ mgp->small_bytes = VLAN_ETH_FRAME_LEN; /* Override the small buffer size? */ if (myri10ge_small_bytes >= 0) mgp->small_bytes = myri10ge_small_bytes; /* Firmware needs the big buff size as a power of 2. Lie and * tell him the buffer is larger, because we only use 1 * buffer/pkt, and the mtu will prevent overruns. */ big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD; if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) { while (!is_power_of_2(big_pow2)) big_pow2++; mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD; } else { big_pow2 = MYRI10GE_ALLOC_SIZE; mgp->big_bytes = big_pow2; } /* setup the per-slice data structures */ for (slice = 0; slice < mgp->num_slices; slice++) { ss = &mgp->ss[slice]; status = myri10ge_get_txrx(mgp, slice); if (status != 0) { netdev_err(dev, "failed to get ring sizes or locations\n"); goto abort_with_rings; } status = myri10ge_allocate_rings(ss); if (status != 0) goto abort_with_rings; /* only firmware which supports multiple TX queues * supports setting up the tx stats on non-zero * slices */ if (slice == 0 || mgp->dev->real_num_tx_queues > 1) status = myri10ge_set_stats(mgp, slice); if (status) { netdev_err(dev, "Couldn't set stats DMA\n"); goto abort_with_rings; } /* must happen prior to any irq */ napi_enable(&(ss)->napi); } /* now give firmware buffers sizes, and MTU */ cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN; status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0); cmd.data0 = mgp->small_bytes; status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0); cmd.data0 = big_pow2; status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0); if (status) { netdev_err(dev, "Couldn't set buffer sizes\n"); goto abort_with_rings; } /* * Set Linux style TSO mode; this is needed only on newer * firmware versions. Older versions default to Linux * style TSO */ cmd.data0 = 0; status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_TSO_MODE, &cmd, 0); if (status && status != -ENOSYS) { netdev_err(dev, "Couldn't set TSO mode\n"); goto abort_with_rings; } mgp->link_state = ~0U; mgp->rdma_tags_available = 15; status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0); if (status) { netdev_err(dev, "Couldn't bring up link\n"); goto abort_with_rings; } mgp->running = MYRI10GE_ETH_RUNNING; mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ; add_timer(&mgp->watchdog_timer); netif_tx_wake_all_queues(dev); return 0; abort_with_rings: while (slice) { slice--; napi_disable(&mgp->ss[slice].napi); } for (i = 0; i < mgp->num_slices; i++) myri10ge_free_rings(&mgp->ss[i]); myri10ge_free_irq(mgp); abort_with_nothing: mgp->running = MYRI10GE_ETH_STOPPED; return -ENOMEM; } static int myri10ge_close(struct net_device *dev) { struct myri10ge_priv *mgp = netdev_priv(dev); struct myri10ge_cmd cmd; int status, old_down_cnt; int i; if (mgp->running != MYRI10GE_ETH_RUNNING) return 0; if (mgp->ss[0].tx.req_bytes == NULL) return 0; del_timer_sync(&mgp->watchdog_timer); mgp->running = MYRI10GE_ETH_STOPPING; for (i = 0; i < mgp->num_slices; i++) napi_disable(&mgp->ss[i].napi); netif_carrier_off(dev); netif_tx_stop_all_queues(dev); if (mgp->rebooted == 0) { old_down_cnt = mgp->down_cnt; mb(); status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0); if (status) netdev_err(dev, "Couldn't bring down link\n"); wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt, HZ); if (old_down_cnt == mgp->down_cnt) netdev_err(dev, "never got down irq\n"); } netif_tx_disable(dev); myri10ge_free_irq(mgp); for (i = 0; i < mgp->num_slices; i++) myri10ge_free_rings(&mgp->ss[i]); mgp->running = MYRI10GE_ETH_STOPPED; return 0; } /* copy an array of struct mcp_kreq_ether_send's to the mcp. Copy * backwards one at a time and handle ring wraps */ static inline void myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src, int cnt) { int idx, starting_slot; starting_slot = tx->req; while (cnt > 1) { cnt--; idx = (starting_slot + cnt) & tx->mask; myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src)); mb(); } } /* * copy an array of struct mcp_kreq_ether_send's to the mcp. Copy * at most 32 bytes at a time, so as to avoid involving the software * pio handler in the nic. We re-write the first segment's flags * to mark them valid only after writing the entire chain. */ static inline void myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src, int cnt) { int idx, i; struct mcp_kreq_ether_send __iomem *dstp, *dst; struct mcp_kreq_ether_send *srcp; u8 last_flags; idx = tx->req & tx->mask; last_flags = src->flags; src->flags = 0; mb(); dst = dstp = &tx->lanai[idx]; srcp = src; if ((idx + cnt) < tx->mask) { for (i = 0; i < (cnt - 1); i += 2) { myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src)); mb(); /* force write every 32 bytes */ srcp += 2; dstp += 2; } } else { /* submit all but the first request, and ensure * that it is submitted below */ myri10ge_submit_req_backwards(tx, src, cnt); i = 0; } if (i < cnt) { /* submit the first request */ myri10ge_pio_copy(dstp, srcp, sizeof(*src)); mb(); /* barrier before setting valid flag */ } /* re-write the last 32-bits with the valid flags */ src->flags = last_flags; put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3); tx->req += cnt; mb(); } static void myri10ge_unmap_tx_dma(struct myri10ge_priv *mgp, struct myri10ge_tx_buf *tx, int idx) { unsigned int len; int last_idx; /* Free any DMA resources we've alloced and clear out the skb slot */ last_idx = (idx + 1) & tx->mask; idx = tx->req & tx->mask; do { len = dma_unmap_len(&tx->info[idx], len); if (len) { if (tx->info[idx].skb != NULL) dma_unmap_single(&mgp->pdev->dev, dma_unmap_addr(&tx->info[idx], bus), len, DMA_TO_DEVICE); else dma_unmap_page(&mgp->pdev->dev, dma_unmap_addr(&tx->info[idx], bus), len, DMA_TO_DEVICE); dma_unmap_len_set(&tx->info[idx], len, 0); tx->info[idx].skb = NULL; } idx = (idx + 1) & tx->mask; } while (idx != last_idx); } /* * Transmit a packet. We need to split the packet so that a single * segment does not cross myri10ge->tx_boundary, so this makes segment * counting tricky. So rather than try to count segments up front, we * just give up if there are too few segments to hold a reasonably * fragmented packet currently available. If we run * out of segments while preparing a packet for DMA, we just linearize * it and try again. */ static netdev_tx_t myri10ge_xmit(struct sk_buff *skb, struct net_device *dev) { struct myri10ge_priv *mgp = netdev_priv(dev); struct myri10ge_slice_state *ss; struct mcp_kreq_ether_send *req; struct myri10ge_tx_buf *tx; skb_frag_t *frag; struct netdev_queue *netdev_queue; dma_addr_t bus; u32 low; __be32 high_swapped; unsigned int len; int idx, avail, frag_cnt, frag_idx, count, mss, max_segments; u16 pseudo_hdr_offset, cksum_offset, queue; int cum_len, seglen, boundary, rdma_count; u8 flags, odd_flag; queue = skb_get_queue_mapping(skb); ss = &mgp->ss[queue]; netdev_queue = netdev_get_tx_queue(mgp->dev, queue); tx = &ss->tx; again: req = tx->req_list; avail = tx->mask - 1 - (tx->req - tx->done); mss = 0; max_segments = MXGEFW_MAX_SEND_DESC; if (skb_is_gso(skb)) { mss = skb_shinfo(skb)->gso_size; max_segments = MYRI10GE_MAX_SEND_DESC_TSO; } if ((unlikely(avail < max_segments))) { /* we are out of transmit resources */ tx->stop_queue++; netif_tx_stop_queue(netdev_queue); return NETDEV_TX_BUSY; } /* Setup checksum offloading, if needed */ cksum_offset = 0; pseudo_hdr_offset = 0; odd_flag = 0; flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST); if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { cksum_offset = skb_checksum_start_offset(skb); pseudo_hdr_offset = cksum_offset + skb->csum_offset; /* If the headers are excessively large, then we must * fall back to a software checksum */ if (unlikely(!mss && (cksum_offset > 255 || pseudo_hdr_offset > 127))) { if (skb_checksum_help(skb)) goto drop; cksum_offset = 0; pseudo_hdr_offset = 0; } else { odd_flag = MXGEFW_FLAGS_ALIGN_ODD; flags |= MXGEFW_FLAGS_CKSUM; } } cum_len = 0; if (mss) { /* TSO */ /* this removes any CKSUM flag from before */ flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST); /* negative cum_len signifies to the * send loop that we are still in the * header portion of the TSO packet. * TSO header can be at most 1KB long */ cum_len = -skb_tcp_all_headers(skb); /* for IPv6 TSO, the checksum offset stores the * TCP header length, to save the firmware from * the need to parse the headers */ if (skb_is_gso_v6(skb)) { cksum_offset = tcp_hdrlen(skb); /* Can only handle headers <= max_tso6 long */ if (unlikely(-cum_len > mgp->max_tso6)) return myri10ge_sw_tso(skb, dev); } /* for TSO, pseudo_hdr_offset holds mss. * The firmware figures out where to put * the checksum by parsing the header. */ pseudo_hdr_offset = mss; } else /* Mark small packets, and pad out tiny packets */ if (skb->len <= MXGEFW_SEND_SMALL_SIZE) { flags |= MXGEFW_FLAGS_SMALL; /* pad frames to at least ETH_ZLEN bytes */ if (eth_skb_pad(skb)) { /* The packet is gone, so we must * return 0 */ ss->stats.tx_dropped += 1; return NETDEV_TX_OK; } } /* map the skb for DMA */ len = skb_headlen(skb); bus = dma_map_single(&mgp->pdev->dev, skb->data, len, DMA_TO_DEVICE); if (unlikely(dma_mapping_error(&mgp->pdev->dev, bus))) goto drop; idx = tx->req & tx->mask; tx->info[idx].skb = skb; dma_unmap_addr_set(&tx->info[idx], bus, bus); dma_unmap_len_set(&tx->info[idx], len, len); frag_cnt = skb_shinfo(skb)->nr_frags; frag_idx = 0; count = 0; rdma_count = 0; /* "rdma_count" is the number of RDMAs belonging to the * current packet BEFORE the current send request. For * non-TSO packets, this is equal to "count". * For TSO packets, rdma_count needs to be reset * to 0 after a segment cut. * * The rdma_count field of the send request is * the number of RDMAs of the packet starting at * that request. For TSO send requests with one ore more cuts * in the middle, this is the number of RDMAs starting * after the last cut in the request. All previous * segments before the last cut implicitly have 1 RDMA. * * Since the number of RDMAs is not known beforehand, * it must be filled-in retroactively - after each * segmentation cut or at the end of the entire packet. */ while (1) { /* Break the SKB or Fragment up into pieces which * do not cross mgp->tx_boundary */ low = MYRI10GE_LOWPART_TO_U32(bus); high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus)); while (len) { u8 flags_next; int cum_len_next; if (unlikely(count == max_segments)) goto abort_linearize; boundary = (low + mgp->tx_boundary) & ~(mgp->tx_boundary - 1); seglen = boundary - low; if (seglen > len) seglen = len; flags_next = flags & ~MXGEFW_FLAGS_FIRST; cum_len_next = cum_len + seglen; if (mss) { /* TSO */ (req - rdma_count)->rdma_count = rdma_count + 1; if (likely(cum_len >= 0)) { /* payload */ int next_is_first, chop; chop = (cum_len_next > mss); cum_len_next = cum_len_next % mss; next_is_first = (cum_len_next == 0); flags |= chop * MXGEFW_FLAGS_TSO_CHOP; flags_next |= next_is_first * MXGEFW_FLAGS_FIRST; rdma_count |= -(chop | next_is_first); rdma_count += chop & ~next_is_first; } else if (likely(cum_len_next >= 0)) { /* header ends */ int small; rdma_count = -1; cum_len_next = 0; seglen = -cum_len; small = (mss <= MXGEFW_SEND_SMALL_SIZE); flags_next = MXGEFW_FLAGS_TSO_PLD | MXGEFW_FLAGS_FIRST | (small * MXGEFW_FLAGS_SMALL); } } req->addr_high = high_swapped; req->addr_low = htonl(low); req->pseudo_hdr_offset = htons(pseudo_hdr_offset); req->pad = 0; /* complete solid 16-byte block; does this matter? */ req->rdma_count = 1; req->length = htons(seglen); req->cksum_offset = cksum_offset; req->flags = flags | ((cum_len & 1) * odd_flag); low += seglen; len -= seglen; cum_len = cum_len_next; flags = flags_next; req++; count++; rdma_count++; if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) { if (unlikely(cksum_offset > seglen)) cksum_offset -= seglen; else cksum_offset = 0; } } if (frag_idx == frag_cnt) break; /* map next fragment for DMA */ frag = &skb_shinfo(skb)->frags[frag_idx]; frag_idx++; len = skb_frag_size(frag); bus = skb_frag_dma_map(&mgp->pdev->dev, frag, 0, len, DMA_TO_DEVICE); if (unlikely(dma_mapping_error(&mgp->pdev->dev, bus))) { myri10ge_unmap_tx_dma(mgp, tx, idx); goto drop; } idx = (count + tx->req) & tx->mask; dma_unmap_addr_set(&tx->info[idx], bus, bus); dma_unmap_len_set(&tx->info[idx], len, len); } (req - rdma_count)->rdma_count = rdma_count; if (mss) do { req--; req->flags |= MXGEFW_FLAGS_TSO_LAST; } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP | MXGEFW_FLAGS_FIRST))); idx = ((count - 1) + tx->req) & tx->mask; tx->info[idx].last = 1; myri10ge_submit_req(tx, tx->req_list, count); /* if using multiple tx queues, make sure NIC polls the * current slice */ if ((mgp->dev->real_num_tx_queues > 1) && tx->queue_active == 0) { tx->queue_active = 1; put_be32(htonl(1), tx->send_go); mb(); } tx->pkt_start++; if ((avail - count) < MXGEFW_MAX_SEND_DESC) { tx->stop_queue++; netif_tx_stop_queue(netdev_queue); } return NETDEV_TX_OK; abort_linearize: myri10ge_unmap_tx_dma(mgp, tx, idx); if (skb_is_gso(skb)) { netdev_err(mgp->dev, "TSO but wanted to linearize?!?!?\n"); goto drop; } if (skb_linearize(skb)) goto drop; tx->linearized++; goto again; drop: dev_kfree_skb_any(skb); ss->stats.tx_dropped += 1; return NETDEV_TX_OK; } static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb, struct net_device *dev) { struct sk_buff *segs, *curr, *next; struct myri10ge_priv *mgp = netdev_priv(dev); struct myri10ge_slice_state *ss; netdev_tx_t status; segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO6); if (IS_ERR(segs)) goto drop; skb_list_walk_safe(segs, curr, next) { skb_mark_not_on_list(curr); status = myri10ge_xmit(curr, dev); if (status != 0) { dev_kfree_skb_any(curr); skb_list_walk_safe(next, curr, next) { curr->next = NULL; dev_kfree_skb_any(curr); } goto drop; } } dev_kfree_skb_any(skb); return NETDEV_TX_OK; drop: ss = &mgp->ss[skb_get_queue_mapping(skb)]; dev_kfree_skb_any(skb); ss->stats.tx_dropped += 1; return NETDEV_TX_OK; } static void myri10ge_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats) { const struct myri10ge_priv *mgp = netdev_priv(dev); const struct myri10ge_slice_netstats *slice_stats; int i; for (i = 0; i < mgp->num_slices; i++) { slice_stats = &mgp->ss[i].stats; stats->rx_packets += slice_stats->rx_packets; stats->tx_packets += slice_stats->tx_packets; stats->rx_bytes += slice_stats->rx_bytes; stats->tx_bytes += slice_stats->tx_bytes; stats->rx_dropped += slice_stats->rx_dropped; stats->tx_dropped += slice_stats->tx_dropped; } } static void myri10ge_set_multicast_list(struct net_device *dev) { struct myri10ge_priv *mgp = netdev_priv(dev); struct myri10ge_cmd cmd; struct netdev_hw_addr *ha; __be32 data[2] = { 0, 0 }; int err; /* can be called from atomic contexts, * pass 1 to force atomicity in myri10ge_send_cmd() */ myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1); /* This firmware is known to not support multicast */ if (!mgp->fw_multicast_support) return; /* Disable multicast filtering */ err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1); if (err != 0) { netdev_err(dev, "Failed MXGEFW_ENABLE_ALLMULTI, error status: %d\n", err); goto abort; } if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) { /* request to disable multicast filtering, so quit here */ return; } /* Flush the filters */ err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS, &cmd, 1); if (err != 0) { netdev_err(dev, "Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS, error status: %d\n", err); goto abort; } /* Walk the multicast list, and add each address */ netdev_for_each_mc_addr(ha, dev) { memcpy(data, &ha->addr, ETH_ALEN); cmd.data0 = ntohl(data[0]); cmd.data1 = ntohl(data[1]); err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP, &cmd, 1); if (err != 0) { netdev_err(dev, "Failed MXGEFW_JOIN_MULTICAST_GROUP, error status:%d %pM\n", err, ha->addr); goto abort; } } /* Enable multicast filtering */ err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1); if (err != 0) { netdev_err(dev, "Failed MXGEFW_DISABLE_ALLMULTI, error status: %d\n", err); goto abort; } return; abort: return; } static int myri10ge_set_mac_address(struct net_device *dev, void *addr) { struct sockaddr *sa = addr; struct myri10ge_priv *mgp = netdev_priv(dev); int status; if (!is_valid_ether_addr(sa->sa_data)) return -EADDRNOTAVAIL; status = myri10ge_update_mac_address(mgp, sa->sa_data); if (status != 0) { netdev_err(dev, "changing mac address failed with %d\n", status); return status; } /* change the dev structure */ eth_hw_addr_set(dev, sa->sa_data); return 0; } static int myri10ge_change_mtu(struct net_device *dev, int new_mtu) { struct myri10ge_priv *mgp = netdev_priv(dev); netdev_info(dev, "changing mtu from %d to %d\n", dev->mtu, new_mtu); if (mgp->running) { /* if we change the mtu on an active device, we must * reset the device so the firmware sees the change */ myri10ge_close(dev); dev->mtu = new_mtu; myri10ge_open(dev); } else dev->mtu = new_mtu; return 0; } /* * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary. * Only do it if the bridge is a root port since we don't want to disturb * any other device, except if forced with myri10ge_ecrc_enable > 1. */ static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp) { struct pci_dev *bridge = mgp->pdev->bus->self; struct device *dev = &mgp->pdev->dev; int cap; unsigned err_cap; int ret; if (!myri10ge_ecrc_enable || !bridge) return; /* check that the bridge is a root port */ if (pci_pcie_type(bridge) != PCI_EXP_TYPE_ROOT_PORT) { if (myri10ge_ecrc_enable > 1) { struct pci_dev *prev_bridge, *old_bridge = bridge; /* Walk the hierarchy up to the root port * where ECRC has to be enabled */ do { prev_bridge = bridge; bridge = bridge->bus->self; if (!bridge || prev_bridge == bridge) { dev_err(dev, "Failed to find root port" " to force ECRC\n"); return; } } while (pci_pcie_type(bridge) != PCI_EXP_TYPE_ROOT_PORT); dev_info(dev, "Forcing ECRC on non-root port %s" " (enabling on root port %s)\n", pci_name(old_bridge), pci_name(bridge)); } else { dev_err(dev, "Not enabling ECRC on non-root port %s\n", pci_name(bridge)); return; } } cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR); if (!cap) return; ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap); if (ret) { dev_err(dev, "failed reading ext-conf-space of %s\n", pci_name(bridge)); dev_err(dev, "\t pci=nommconf in use? " "or buggy/incomplete/absent ACPI MCFG attr?\n"); return; } if (!(err_cap & PCI_ERR_CAP_ECRC_GENC)) return; err_cap |= PCI_ERR_CAP_ECRC_GENE; pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap); dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge)); } /* * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput * when the PCI-E Completion packets are aligned on an 8-byte * boundary. Some PCI-E chip sets always align Completion packets; on * the ones that do not, the alignment can be enforced by enabling * ECRC generation (if supported). * * When PCI-E Completion packets are not aligned, it is actually more * efficient to limit Read-DMA transactions to 2KB, rather than 4KB. * * If the driver can neither enable ECRC nor verify that it has * already been enabled, then it must use a firmware image which works * around unaligned completion packets (myri10ge_rss_ethp_z8e.dat), and it * should also ensure that it never gives the device a Read-DMA which is * larger than 2KB by setting the tx_boundary to 2KB. If ECRC is * enabled, then the driver should use the aligned (myri10ge_rss_eth_z8e.dat) * firmware image, and set tx_boundary to 4KB. */ static void myri10ge_firmware_probe(struct myri10ge_priv *mgp) { struct pci_dev *pdev = mgp->pdev; struct device *dev = &pdev->dev; int status; mgp->tx_boundary = 4096; /* * Verify the max read request size was set to 4KB * before trying the test with 4KB. */ status = pcie_get_readrq(pdev); if (status < 0) { dev_err(dev, "Couldn't read max read req size: %d\n", status); goto abort; } if (status != 4096) { dev_warn(dev, "Max Read Request size != 4096 (%d)\n", status); mgp->tx_boundary = 2048; } /* * load the optimized firmware (which assumes aligned PCIe * completions) in order to see if it works on this host. */ set_fw_name(mgp, myri10ge_fw_aligned, false); status = myri10ge_load_firmware(mgp, 1); if (status != 0) { goto abort; } /* * Enable ECRC if possible */ myri10ge_enable_ecrc(mgp); /* * Run a DMA test which watches for unaligned completions and * aborts on the first one seen. */ status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST); if (status == 0) return; /* keep the aligned firmware */ if (status != -E2BIG) dev_warn(dev, "DMA test failed: %d\n", status); if (status == -ENOSYS) dev_warn(dev, "Falling back to ethp! " "Please install up to date fw\n"); abort: /* fall back to using the unaligned firmware */ mgp->tx_boundary = 2048; set_fw_name(mgp, myri10ge_fw_unaligned, false); } static void myri10ge_select_firmware(struct myri10ge_priv *mgp) { int overridden = 0; if (myri10ge_force_firmware == 0) { int link_width; u16 lnk; pcie_capability_read_word(mgp->pdev, PCI_EXP_LNKSTA, &lnk); link_width = (lnk >> 4) & 0x3f; /* Check to see if Link is less than 8 or if the * upstream bridge is known to provide aligned * completions */ if (link_width < 8) { dev_info(&mgp->pdev->dev, "PCIE x%d Link\n", link_width); mgp->tx_boundary = 4096; set_fw_name(mgp, myri10ge_fw_aligned, false); } else { myri10ge_firmware_probe(mgp); } } else { if (myri10ge_force_firmware == 1) { dev_info(&mgp->pdev->dev, "Assuming aligned completions (forced)\n"); mgp->tx_boundary = 4096; set_fw_name(mgp, myri10ge_fw_aligned, false); } else { dev_info(&mgp->pdev->dev, "Assuming unaligned completions (forced)\n"); mgp->tx_boundary = 2048; set_fw_name(mgp, myri10ge_fw_unaligned, false); } } kernel_param_lock(THIS_MODULE); if (myri10ge_fw_name != NULL) { char *fw_name = kstrdup(myri10ge_fw_name, GFP_KERNEL); if (fw_name) { overridden = 1; set_fw_name(mgp, fw_name, true); } } kernel_param_unlock(THIS_MODULE); if (mgp->board_number < MYRI10GE_MAX_BOARDS && myri10ge_fw_names[mgp->board_number] != NULL && strlen(myri10ge_fw_names[mgp->board_number])) { set_fw_name(mgp, myri10ge_fw_names[mgp->board_number], false); overridden = 1; } if (overridden) dev_info(&mgp->pdev->dev, "overriding firmware to %s\n", mgp->fw_name); } static void myri10ge_mask_surprise_down(struct pci_dev *pdev) { struct pci_dev *bridge = pdev->bus->self; int cap; u32 mask; if (bridge == NULL) return; cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR); if (cap) { /* a sram parity error can cause a surprise link * down; since we expect and can recover from sram * parity errors, mask surprise link down events */ pci_read_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, &mask); mask |= 0x20; pci_write_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, mask); } } static int __maybe_unused myri10ge_suspend(struct device *dev) { struct myri10ge_priv *mgp; struct net_device *netdev; mgp = dev_get_drvdata(dev); if (mgp == NULL) return -EINVAL; netdev = mgp->dev; netif_device_detach(netdev); if (netif_running(netdev)) { netdev_info(netdev, "closing\n"); rtnl_lock(); myri10ge_close(netdev); rtnl_unlock(); } myri10ge_dummy_rdma(mgp, 0); return 0; } static int __maybe_unused myri10ge_resume(struct device *dev) { struct pci_dev *pdev = to_pci_dev(dev); struct myri10ge_priv *mgp; struct net_device *netdev; int status; u16 vendor; mgp = pci_get_drvdata(pdev); if (mgp == NULL) return -EINVAL; netdev = mgp->dev; msleep(5); /* give card time to respond */ pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor); if (vendor == 0xffff) { netdev_err(mgp->dev, "device disappeared!\n"); return -EIO; } myri10ge_reset(mgp); myri10ge_dummy_rdma(mgp, 1); if (netif_running(netdev)) { rtnl_lock(); status = myri10ge_open(netdev); rtnl_unlock(); if (status != 0) goto abort_with_enabled; } netif_device_attach(netdev); return 0; abort_with_enabled: return -EIO; } static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp) { struct pci_dev *pdev = mgp->pdev; int vs = mgp->vendor_specific_offset; u32 reboot; /*enter read32 mode */ pci_write_config_byte(pdev, vs + 0x10, 0x3); /*read REBOOT_STATUS (0xfffffff0) */ pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0); pci_read_config_dword(pdev, vs + 0x14, &reboot); return reboot; } static void myri10ge_check_slice(struct myri10ge_slice_state *ss, int *reset_needed, int *busy_slice_cnt, u32 rx_pause_cnt) { struct myri10ge_priv *mgp = ss->mgp; int slice = ss - mgp->ss; if (ss->tx.req != ss->tx.done && ss->tx.done == ss->watchdog_tx_done && ss->watchdog_tx_req != ss->watchdog_tx_done) { /* nic seems like it might be stuck.. */ if (rx_pause_cnt != mgp->watchdog_pause) { if (net_ratelimit()) netdev_warn(mgp->dev, "slice %d: TX paused, " "check link partner\n", slice); } else { netdev_warn(mgp->dev, "slice %d: TX stuck %d %d %d %d %d %d\n", slice, ss->tx.queue_active, ss->tx.req, ss->tx.done, ss->tx.pkt_start, ss->tx.pkt_done, (int)ntohl(mgp->ss[slice].fw_stats-> send_done_count)); *reset_needed = 1; ss->stuck = 1; } } if (ss->watchdog_tx_done != ss->tx.done || ss->watchdog_rx_done != ss->rx_done.cnt) { *busy_slice_cnt += 1; } ss->watchdog_tx_done = ss->tx.done; ss->watchdog_tx_req = ss->tx.req; ss->watchdog_rx_done = ss->rx_done.cnt; } /* * This watchdog is used to check whether the board has suffered * from a parity error and needs to be recovered. */ static void myri10ge_watchdog(struct work_struct *work) { struct myri10ge_priv *mgp = container_of(work, struct myri10ge_priv, watchdog_work); struct myri10ge_slice_state *ss; u32 reboot, rx_pause_cnt; int status, rebooted; int i; int reset_needed = 0; int busy_slice_cnt = 0; u16 cmd, vendor; mgp->watchdog_resets++; pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd); rebooted = 0; if ((cmd & PCI_COMMAND_MASTER) == 0) { /* Bus master DMA disabled? Check to see * if the card rebooted due to a parity error * For now, just report it */ reboot = myri10ge_read_reboot(mgp); netdev_err(mgp->dev, "NIC rebooted (0x%x),%s resetting\n", reboot, myri10ge_reset_recover ? "" : " not"); if (myri10ge_reset_recover == 0) return; rtnl_lock(); mgp->rebooted = 1; rebooted = 1; myri10ge_close(mgp->dev); myri10ge_reset_recover--; mgp->rebooted = 0; /* * A rebooted nic will come back with config space as * it was after power was applied to PCIe bus. * Attempt to restore config space which was saved * when the driver was loaded, or the last time the * nic was resumed from power saving mode. */ pci_restore_state(mgp->pdev); /* save state again for accounting reasons */ pci_save_state(mgp->pdev); } else { /* if we get back -1's from our slot, perhaps somebody * powered off our card. Don't try to reset it in * this case */ if (cmd == 0xffff) { pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor); if (vendor == 0xffff) { netdev_err(mgp->dev, "device disappeared!\n"); return; } } /* Perhaps it is a software error. See if stuck slice * has recovered, reset if not */ rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause); for (i = 0; i < mgp->num_slices; i++) { ss = mgp->ss; if (ss->stuck) { myri10ge_check_slice(ss, &reset_needed, &busy_slice_cnt, rx_pause_cnt); ss->stuck = 0; } } if (!reset_needed) { netdev_dbg(mgp->dev, "not resetting\n"); return; } netdev_err(mgp->dev, "device timeout, resetting\n"); } if (!rebooted) { rtnl_lock(); myri10ge_close(mgp->dev); } status = myri10ge_load_firmware(mgp, 1); if (status != 0) netdev_err(mgp->dev, "failed to load firmware\n"); else myri10ge_open(mgp->dev); rtnl_unlock(); } /* * We use our own timer routine rather than relying upon * netdev->tx_timeout because we have a very large hardware transmit * queue. Due to the large queue, the netdev->tx_timeout function * cannot detect a NIC with a parity error in a timely fashion if the * NIC is lightly loaded. */ static void myri10ge_watchdog_timer(struct timer_list *t) { struct myri10ge_priv *mgp; struct myri10ge_slice_state *ss; int i, reset_needed, busy_slice_cnt; u32 rx_pause_cnt; u16 cmd; mgp = from_timer(mgp, t, watchdog_timer); rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause); busy_slice_cnt = 0; for (i = 0, reset_needed = 0; i < mgp->num_slices && reset_needed == 0; ++i) { ss = &mgp->ss[i]; if (ss->rx_small.watchdog_needed) { myri10ge_alloc_rx_pages(mgp, &ss->rx_small, mgp->small_bytes + MXGEFW_PAD, 1); if (ss->rx_small.fill_cnt - ss->rx_small.cnt >= myri10ge_fill_thresh) ss->rx_small.watchdog_needed = 0; } if (ss->rx_big.watchdog_needed) { myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 1); if (ss->rx_big.fill_cnt - ss->rx_big.cnt >= myri10ge_fill_thresh) ss->rx_big.watchdog_needed = 0; } myri10ge_check_slice(ss, &reset_needed, &busy_slice_cnt, rx_pause_cnt); } /* if we've sent or received no traffic, poll the NIC to * ensure it is still there. Otherwise, we risk not noticing * an error in a timely fashion */ if (busy_slice_cnt == 0) { pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd); if ((cmd & PCI_COMMAND_MASTER) == 0) { reset_needed = 1; } } mgp->watchdog_pause = rx_pause_cnt; if (reset_needed) { schedule_work(&mgp->watchdog_work); } else { /* rearm timer */ mod_timer(&mgp->watchdog_timer, jiffies + myri10ge_watchdog_timeout * HZ); } } static void myri10ge_free_slices(struct myri10ge_priv *mgp) { struct myri10ge_slice_state *ss; struct pci_dev *pdev = mgp->pdev; size_t bytes; int i; if (mgp->ss == NULL) return; for (i = 0; i < mgp->num_slices; i++) { ss = &mgp->ss[i]; if (ss->rx_done.entry != NULL) { bytes = mgp->max_intr_slots * sizeof(*ss->rx_done.entry); dma_free_coherent(&pdev->dev, bytes, ss->rx_done.entry, ss->rx_done.bus); ss->rx_done.entry = NULL; } if (ss->fw_stats != NULL) { bytes = sizeof(*ss->fw_stats); dma_free_coherent(&pdev->dev, bytes, ss->fw_stats, ss->fw_stats_bus); ss->fw_stats = NULL; } __netif_napi_del(&ss->napi); } /* Wait till napi structs are no longer used, and then free ss. */ synchronize_net(); kfree(mgp->ss); mgp->ss = NULL; } static int myri10ge_alloc_slices(struct myri10ge_priv *mgp) { struct myri10ge_slice_state *ss; struct pci_dev *pdev = mgp->pdev; size_t bytes; int i; bytes = sizeof(*mgp->ss) * mgp->num_slices; mgp->ss = kzalloc(bytes, GFP_KERNEL); if (mgp->ss == NULL) { return -ENOMEM; } for (i = 0; i < mgp->num_slices; i++) { ss = &mgp->ss[i]; bytes = mgp->max_intr_slots * sizeof(*ss->rx_done.entry); ss->rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes, &ss->rx_done.bus, GFP_KERNEL); if (ss->rx_done.entry == NULL) goto abort; bytes = sizeof(*ss->fw_stats); ss->fw_stats = dma_alloc_coherent(&pdev->dev, bytes, &ss->fw_stats_bus, GFP_KERNEL); if (ss->fw_stats == NULL) goto abort; ss->mgp = mgp; ss->dev = mgp->dev; netif_napi_add_weight(ss->dev, &ss->napi, myri10ge_poll, myri10ge_napi_weight); } return 0; abort: myri10ge_free_slices(mgp); return -ENOMEM; } /* * This function determines the number of slices supported. * The number slices is the minimum of the number of CPUS, * the number of MSI-X irqs supported, the number of slices * supported by the firmware */ static void myri10ge_probe_slices(struct myri10ge_priv *mgp) { struct myri10ge_cmd cmd; struct pci_dev *pdev = mgp->pdev; char *old_fw; bool old_allocated; int i, status, ncpus; mgp->num_slices = 1; ncpus = netif_get_num_default_rss_queues(); if (myri10ge_max_slices == 1 || !pdev->msix_cap || (myri10ge_max_slices == -1 && ncpus < 2)) return; /* try to load the slice aware rss firmware */ old_fw = mgp->fw_name; old_allocated = mgp->fw_name_allocated; /* don't free old_fw if we override it. */ mgp->fw_name_allocated = false; if (myri10ge_fw_name != NULL) { dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n", myri10ge_fw_name); set_fw_name(mgp, myri10ge_fw_name, false); } else if (old_fw == myri10ge_fw_aligned) set_fw_name(mgp, myri10ge_fw_rss_aligned, false); else set_fw_name(mgp, myri10ge_fw_rss_unaligned, false); status = myri10ge_load_firmware(mgp, 0); if (status != 0) { dev_info(&pdev->dev, "Rss firmware not found\n"); if (old_allocated) kfree(old_fw); return; } /* hit the board with a reset to ensure it is alive */ memset(&cmd, 0, sizeof(cmd)); status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0); if (status != 0) { dev_err(&mgp->pdev->dev, "failed reset\n"); goto abort_with_fw; } mgp->max_intr_slots = cmd.data0 / sizeof(struct mcp_slot); /* tell it the size of the interrupt queues */ cmd.data0 = mgp->max_intr_slots * sizeof(struct mcp_slot); status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0); if (status != 0) { dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_SET_INTRQ_SIZE\n"); goto abort_with_fw; } /* ask the maximum number of slices it supports */ status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0); if (status != 0) goto abort_with_fw; else mgp->num_slices = cmd.data0; /* Only allow multiple slices if MSI-X is usable */ if (!myri10ge_msi) { goto abort_with_fw; } /* if the admin did not specify a limit to how many * slices we should use, cap it automatically to the * number of CPUs currently online */ if (myri10ge_max_slices == -1) myri10ge_max_slices = ncpus; if (mgp->num_slices > myri10ge_max_slices) mgp->num_slices = myri10ge_max_slices; /* Now try to allocate as many MSI-X vectors as we have * slices. We give up on MSI-X if we can only get a single * vector. */ mgp->msix_vectors = kcalloc(mgp->num_slices, sizeof(*mgp->msix_vectors), GFP_KERNEL); if (mgp->msix_vectors == NULL) goto no_msix; for (i = 0; i < mgp->num_slices; i++) { mgp->msix_vectors[i].entry = i; } while (mgp->num_slices > 1) { mgp->num_slices = rounddown_pow_of_two(mgp->num_slices); if (mgp->num_slices == 1) goto no_msix; status = pci_enable_msix_range(pdev, mgp->msix_vectors, mgp->num_slices, mgp->num_slices); if (status < 0) goto no_msix; pci_disable_msix(pdev); if (status == mgp->num_slices) { if (old_allocated) kfree(old_fw); return; } else { mgp->num_slices = status; } } no_msix: if (mgp->msix_vectors != NULL) { kfree(mgp->msix_vectors); mgp->msix_vectors = NULL; } abort_with_fw: mgp->num_slices = 1; set_fw_name(mgp, old_fw, old_allocated); myri10ge_load_firmware(mgp, 0); } static const struct net_device_ops myri10ge_netdev_ops = { .ndo_open = myri10ge_open, .ndo_stop = myri10ge_close, .ndo_start_xmit = myri10ge_xmit, .ndo_get_stats64 = myri10ge_get_stats, .ndo_validate_addr = eth_validate_addr, .ndo_change_mtu = myri10ge_change_mtu, .ndo_set_rx_mode = myri10ge_set_multicast_list, .ndo_set_mac_address = myri10ge_set_mac_address, }; static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { struct net_device *netdev; struct myri10ge_priv *mgp; struct device *dev = &pdev->dev; int status = -ENXIO; unsigned hdr_offset, ss_offset; static int board_number; netdev = alloc_etherdev_mq(sizeof(*mgp), MYRI10GE_MAX_SLICES); if (netdev == NULL) return -ENOMEM; SET_NETDEV_DEV(netdev, &pdev->dev); mgp = netdev_priv(netdev); mgp->dev = netdev; mgp->pdev = pdev; mgp->pause = myri10ge_flow_control; mgp->intr_coal_delay = myri10ge_intr_coal_delay; mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT); mgp->board_number = board_number; init_waitqueue_head(&mgp->down_wq); if (pci_enable_device(pdev)) { dev_err(&pdev->dev, "pci_enable_device call failed\n"); status = -ENODEV; goto abort_with_netdev; } /* Find the vendor-specific cap so we can check * the reboot register later on */ mgp->vendor_specific_offset = pci_find_capability(pdev, PCI_CAP_ID_VNDR); /* Set our max read request to 4KB */ status = pcie_set_readrq(pdev, 4096); if (status != 0) { dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n", status); goto abort_with_enabled; } myri10ge_mask_surprise_down(pdev); pci_set_master(pdev); status = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (status != 0) { dev_err(&pdev->dev, "Error %d setting DMA mask\n", status); goto abort_with_enabled; } mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd), &mgp->cmd_bus, GFP_KERNEL); if (!mgp->cmd) { status = -ENOMEM; goto abort_with_enabled; } mgp->board_span = pci_resource_len(pdev, 0); mgp->iomem_base = pci_resource_start(pdev, 0); mgp->wc_cookie = arch_phys_wc_add(mgp->iomem_base, mgp->board_span); mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span); if (mgp->sram == NULL) { dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n", mgp->board_span, mgp->iomem_base); status = -ENXIO; goto abort_with_mtrr; } hdr_offset = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET)) & 0xffffc; ss_offset = hdr_offset + offsetof(struct mcp_gen_header, string_specs); mgp->sram_size = swab32(readl(mgp->sram + ss_offset)); if (mgp->sram_size > mgp->board_span || mgp->sram_size <= MYRI10GE_FW_OFFSET) { dev_err(&pdev->dev, "invalid sram_size %dB or board span %ldB\n", mgp->sram_size, mgp->board_span); status = -EINVAL; goto abort_with_ioremap; } memcpy_fromio(mgp->eeprom_strings, mgp->sram + mgp->sram_size, MYRI10GE_EEPROM_STRINGS_SIZE); memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2); status = myri10ge_read_mac_addr(mgp); if (status) goto abort_with_ioremap; eth_hw_addr_set(netdev, mgp->mac_addr); myri10ge_select_firmware(mgp); status = myri10ge_load_firmware(mgp, 1); if (status != 0) { dev_err(&pdev->dev, "failed to load firmware\n"); goto abort_with_ioremap; } myri10ge_probe_slices(mgp); status = myri10ge_alloc_slices(mgp); if (status != 0) { dev_err(&pdev->dev, "failed to alloc slice state\n"); goto abort_with_firmware; } netif_set_real_num_tx_queues(netdev, mgp->num_slices); netif_set_real_num_rx_queues(netdev, mgp->num_slices); status = myri10ge_reset(mgp); if (status != 0) { dev_err(&pdev->dev, "failed reset\n"); goto abort_with_slices; } #ifdef CONFIG_MYRI10GE_DCA myri10ge_setup_dca(mgp); #endif pci_set_drvdata(pdev, mgp); /* MTU range: 68 - 9000 */ netdev->min_mtu = ETH_MIN_MTU; netdev->max_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN; if (myri10ge_initial_mtu > netdev->max_mtu) myri10ge_initial_mtu = netdev->max_mtu; if (myri10ge_initial_mtu < netdev->min_mtu) myri10ge_initial_mtu = netdev->min_mtu; netdev->mtu = myri10ge_initial_mtu; netdev->netdev_ops = &myri10ge_netdev_ops; netdev->hw_features = mgp->features | NETIF_F_RXCSUM; /* fake NETIF_F_HW_VLAN_CTAG_RX for good GRO performance */ netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; netdev->features = netdev->hw_features | NETIF_F_HIGHDMA; netdev->vlan_features |= mgp->features; if (mgp->fw_ver_tiny < 37) netdev->vlan_features &= ~NETIF_F_TSO6; if (mgp->fw_ver_tiny < 32) netdev->vlan_features &= ~NETIF_F_TSO; /* make sure we can get an irq, and that MSI can be * setup (if available). */ status = myri10ge_request_irq(mgp); if (status != 0) goto abort_with_slices; myri10ge_free_irq(mgp); /* Save configuration space to be restored if the * nic resets due to a parity error */ pci_save_state(pdev); /* Setup the watchdog timer */ timer_setup(&mgp->watchdog_timer, myri10ge_watchdog_timer, 0); netdev->ethtool_ops = &myri10ge_ethtool_ops; INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog); status = register_netdev(netdev); if (status != 0) { dev_err(&pdev->dev, "register_netdev failed: %d\n", status); goto abort_with_state; } if (mgp->msix_enabled) dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, MTRR %s, WC Enabled\n", mgp->num_slices, mgp->tx_boundary, mgp->fw_name, (mgp->wc_cookie > 0 ? "Enabled" : "Disabled")); else dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, MTRR %s, WC Enabled\n", mgp->msi_enabled ? "MSI" : "xPIC", pdev->irq, mgp->tx_boundary, mgp->fw_name, (mgp->wc_cookie > 0 ? "Enabled" : "Disabled")); board_number++; return 0; abort_with_state: pci_restore_state(pdev); abort_with_slices: myri10ge_free_slices(mgp); abort_with_firmware: kfree(mgp->msix_vectors); myri10ge_dummy_rdma(mgp, 0); abort_with_ioremap: if (mgp->mac_addr_string != NULL) dev_err(&pdev->dev, "myri10ge_probe() failed: MAC=%s, SN=%ld\n", mgp->mac_addr_string, mgp->serial_number); iounmap(mgp->sram); abort_with_mtrr: arch_phys_wc_del(mgp->wc_cookie); dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd), mgp->cmd, mgp->cmd_bus); abort_with_enabled: pci_disable_device(pdev); abort_with_netdev: set_fw_name(mgp, NULL, false); free_netdev(netdev); return status; } /* * myri10ge_remove * * Does what is necessary to shutdown one Myrinet device. Called * once for each Myrinet card by the kernel when a module is * unloaded. */ static void myri10ge_remove(struct pci_dev *pdev) { struct myri10ge_priv *mgp; struct net_device *netdev; mgp = pci_get_drvdata(pdev); if (mgp == NULL) return; cancel_work_sync(&mgp->watchdog_work); netdev = mgp->dev; unregister_netdev(netdev); #ifdef CONFIG_MYRI10GE_DCA myri10ge_teardown_dca(mgp); #endif myri10ge_dummy_rdma(mgp, 0); /* avoid a memory leak */ pci_restore_state(pdev); iounmap(mgp->sram); arch_phys_wc_del(mgp->wc_cookie); myri10ge_free_slices(mgp); kfree(mgp->msix_vectors); dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd), mgp->cmd, mgp->cmd_bus); set_fw_name(mgp, NULL, false); free_netdev(netdev); pci_disable_device(pdev); } #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E 0x0008 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9 0x0009 static const struct pci_device_id myri10ge_pci_tbl[] = { {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)}, {PCI_DEVICE (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)}, {0}, }; MODULE_DEVICE_TABLE(pci, myri10ge_pci_tbl); static SIMPLE_DEV_PM_OPS(myri10ge_pm_ops, myri10ge_suspend, myri10ge_resume); static struct pci_driver myri10ge_driver = { .name = "myri10ge", .probe = myri10ge_probe, .remove = myri10ge_remove, .id_table = myri10ge_pci_tbl, .driver.pm = &myri10ge_pm_ops, }; #ifdef CONFIG_MYRI10GE_DCA static int myri10ge_notify_dca(struct notifier_block *nb, unsigned long event, void *p) { int err = driver_for_each_device(&myri10ge_driver.driver, NULL, &event, myri10ge_notify_dca_device); if (err) return NOTIFY_BAD; return NOTIFY_DONE; } static struct notifier_block myri10ge_dca_notifier = { .notifier_call = myri10ge_notify_dca, .next = NULL, .priority = 0, }; #endif /* CONFIG_MYRI10GE_DCA */ static __init int myri10ge_init_module(void) { pr_info("Version %s\n", MYRI10GE_VERSION_STR); if (myri10ge_rss_hash > MXGEFW_RSS_HASH_TYPE_MAX) { pr_err("Illegal rssh hash type %d, defaulting to source port\n", myri10ge_rss_hash); myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT; } #ifdef CONFIG_MYRI10GE_DCA dca_register_notify(&myri10ge_dca_notifier); #endif if (myri10ge_max_slices > MYRI10GE_MAX_SLICES) myri10ge_max_slices = MYRI10GE_MAX_SLICES; return pci_register_driver(&myri10ge_driver); } module_init(myri10ge_init_module); static __exit void myri10ge_cleanup_module(void) { #ifdef CONFIG_MYRI10GE_DCA dca_unregister_notify(&myri10ge_dca_notifier); #endif pci_unregister_driver(&myri10ge_driver); } module_exit(myri10ge_cleanup_module);
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