| /************************************************************************* |
| * myri10ge.c: Myricom Myri-10G Ethernet driver. |
| * |
| * Copyright (C) 2005 - 2009 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/inet_lro.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/ip.h> |
| #include <net/tcp.h> |
| #include <asm/byteorder.h> |
| #include <asm/io.h> |
| #include <asm/processor.h> |
| #ifdef CONFIG_MTRR |
| #include <asm/mtrr.h> |
| #endif |
| |
| #include "myri10ge_mcp.h" |
| #include "myri10ge_mcp_gen_header.h" |
| |
| #define MYRI10GE_VERSION_STR "1.5.2-1.459" |
| |
| 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_MAX_LRO_DESCRIPTORS 8 |
| #define MYRI10GE_LRO_MAX_PKTS 64 |
| |
| #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 net_lro_mgr lro_mgr; |
| struct net_lro_desc lro_desc[MYRI10GE_MAX_LRO_DESCRIPTORS]; |
| }; |
| |
| 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; |
| #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 mtrr; |
| int wc_enabled; |
| 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[6]; /* 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 kparam_block_sysfs_write */ |
| static char *myri10ge_fw_name = NULL; |
| module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR); |
| 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_name, "Firmware image names per board"); |
| |
| static int myri10ge_ecrc_enable = 1; |
| module_param(myri10ge_ecrc_enable, int, S_IRUGO); |
| 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, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets"); |
| |
| static int myri10ge_msi = 1; /* enable msi by default */ |
| module_param(myri10ge_msi, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts"); |
| |
| static int myri10ge_intr_coal_delay = 75; |
| module_param(myri10ge_intr_coal_delay, int, S_IRUGO); |
| MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay"); |
| |
| static int myri10ge_flow_control = 1; |
| module_param(myri10ge_flow_control, int, S_IRUGO); |
| MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter"); |
| |
| static int myri10ge_deassert_wait = 1; |
| module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(myri10ge_deassert_wait, |
| "Wait when deasserting legacy interrupts"); |
| |
| static int myri10ge_force_firmware = 0; |
| module_param(myri10ge_force_firmware, int, S_IRUGO); |
| 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, S_IRUGO); |
| MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU"); |
| |
| static int myri10ge_napi_weight = 64; |
| module_param(myri10ge_napi_weight, int, S_IRUGO); |
| MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight"); |
| |
| static int myri10ge_watchdog_timeout = 1; |
| module_param(myri10ge_watchdog_timeout, int, S_IRUGO); |
| MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout"); |
| |
| static int myri10ge_max_irq_loops = 1048576; |
| module_param(myri10ge_max_irq_loops, int, S_IRUGO); |
| 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_lro_max_pkts = MYRI10GE_LRO_MAX_PKTS; |
| module_param(myri10ge_lro_max_pkts, int, S_IRUGO); |
| MODULE_PARM_DESC(myri10ge_lro_max_pkts, |
| "Number of LRO packets to be aggregated"); |
| |
| static int myri10ge_fill_thresh = 256; |
| module_param(myri10ge_fill_thresh, int, S_IRUGO | S_IWUSR); |
| 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, S_IRUGO); |
| 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, S_IRUGO); |
| MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do"); |
| |
| static int myri10ge_dca = 1; |
| module_param(myri10ge_dca, int, S_IRUGO); |
| 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 struct rtnl_link_stats64 *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 */ |
| strncpy(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 ((status = 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) { |
| dev_err(dev, "could not malloc firmware hdr\n"); |
| 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, 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 = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE, |
| DMA_BIDIRECTIONAL); |
| |
| /* 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: |
| pci_unmap_page(mgp->pdev, 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, cap, err; |
| u16 ctl; |
| |
| cap = pci_find_capability(pdev, PCI_CAP_ID_EXP); |
| if (!cap) |
| return 0; |
| |
| err = pci_read_config_word(pdev, cap + PCI_EXP_DEVCTL, &ctl); |
| ret = (ctl & PCI_EXP_DEVCTL_RELAX_EN) >> 4; |
| if (ret != on) { |
| ctl &= ~PCI_EXP_DEVCTL_RELAX_EN; |
| ctl |= (on << 4); |
| pci_write_config_word(pdev, cap + 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; |
| int err; |
| |
| if (!mgp->dca_enabled) |
| return; |
| mgp->dca_enabled = 0; |
| if (mgp->relaxed_order) |
| myri10ge_toggle_relaxed(pdev, 1); |
| err = 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 inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, __wsum hw_csum) |
| { |
| struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data); |
| |
| if ((skb->protocol == htons(ETH_P_8021Q)) && |
| (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) || |
| vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) { |
| skb->csum = hw_csum; |
| skb->ip_summed = CHECKSUM_COMPLETE; |
| } |
| } |
| |
| static inline void |
| myri10ge_rx_skb_build(struct sk_buff *skb, u8 * va, |
| struct skb_frag_struct *rx_frags, int len, int hlen) |
| { |
| struct skb_frag_struct *skb_frags; |
| |
| skb->len = skb->data_len = len; |
| skb->truesize = len + sizeof(struct sk_buff); |
| /* attach the page(s) */ |
| |
| skb_frags = skb_shinfo(skb)->frags; |
| while (len > 0) { |
| memcpy(skb_frags, rx_frags, sizeof(*skb_frags)); |
| len -= rx_frags->size; |
| skb_frags++; |
| rx_frags++; |
| skb_shinfo(skb)->nr_frags++; |
| } |
| |
| /* pskb_may_pull is not available in irq context, but |
| * skb_pull() (for ether_pad and eth_type_trans()) requires |
| * the beginning of the packet in skb_headlen(), move it |
| * manually */ |
| skb_copy_to_linear_data(skb, va, hlen); |
| skb_shinfo(skb)->frags[0].page_offset += hlen; |
| skb_shinfo(skb)->frags[0].size -= hlen; |
| skb->data_len -= hlen; |
| skb->tail += hlen; |
| skb_pull(skb, MXGEFW_PAD); |
| } |
| |
| static void |
| myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx, |
| int bytes, int watchdog) |
| { |
| struct page *page; |
| 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; |
| } |
| rx->page = page; |
| rx->page_offset = 0; |
| rx->bus = pci_map_page(mgp->pdev, page, 0, |
| MYRI10GE_ALLOC_SIZE, |
| PCI_DMA_FROMDEVICE); |
| } |
| 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) { |
| pci_unmap_page(pdev, (dma_unmap_addr(info, bus) |
| & ~(MYRI10GE_ALLOC_SIZE - 1)), |
| MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE); |
| } |
| } |
| |
| #define MYRI10GE_HLEN 64 /* The number of bytes to copy from a |
| * page into an skb */ |
| |
| static inline int |
| myri10ge_rx_done(struct myri10ge_slice_state *ss, int len, __wsum csum, |
| int lro_enabled) |
| { |
| struct myri10ge_priv *mgp = ss->mgp; |
| struct sk_buff *skb; |
| struct skb_frag_struct rx_frags[MYRI10GE_MAX_FRAGS_PER_FRAME]; |
| struct myri10ge_rx_buf *rx; |
| int i, idx, hlen, 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); |
| /* Fill skb_frag_struct(s) with data from our receive */ |
| for (i = 0, remainder = len; remainder > 0; i++) { |
| myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes); |
| rx_frags[i].page = rx->info[idx].page; |
| rx_frags[i].page_offset = rx->info[idx].page_offset; |
| if (remainder < MYRI10GE_ALLOC_SIZE) |
| rx_frags[i].size = remainder; |
| else |
| rx_frags[i].size = MYRI10GE_ALLOC_SIZE; |
| rx->cnt++; |
| idx = rx->cnt & rx->mask; |
| remainder -= MYRI10GE_ALLOC_SIZE; |
| } |
| |
| if (lro_enabled) { |
| rx_frags[0].page_offset += MXGEFW_PAD; |
| rx_frags[0].size -= MXGEFW_PAD; |
| len -= MXGEFW_PAD; |
| lro_receive_frags(&ss->rx_done.lro_mgr, rx_frags, |
| /* opaque, will come back in get_frag_header */ |
| len, len, |
| (void *)(__force unsigned long)csum, csum); |
| |
| return 1; |
| } |
| |
| hlen = MYRI10GE_HLEN > len ? len : MYRI10GE_HLEN; |
| |
| /* allocate an skb to attach the page(s) to. This is done |
| * after trying LRO, so as to avoid skb allocation overheads */ |
| |
| skb = netdev_alloc_skb(dev, MYRI10GE_HLEN + 16); |
| if (unlikely(skb == NULL)) { |
| ss->stats.rx_dropped++; |
| do { |
| i--; |
| put_page(rx_frags[i].page); |
| } while (i != 0); |
| return 0; |
| } |
| |
| /* Attach the pages to the skb, and trim off any padding */ |
| myri10ge_rx_skb_build(skb, va, rx_frags, len, hlen); |
| if (skb_shinfo(skb)->frags[0].size <= 0) { |
| put_page(skb_shinfo(skb)->frags[0].page); |
| skb_shinfo(skb)->nr_frags = 0; |
| } |
| skb->protocol = eth_type_trans(skb, dev); |
| skb_record_rx_queue(skb, ss - &mgp->ss[0]); |
| |
| if (dev->features & NETIF_F_RXCSUM) { |
| if ((skb->protocol == htons(ETH_P_IP)) || |
| (skb->protocol == htons(ETH_P_IPV6))) { |
| skb->csum = csum; |
| skb->ip_summed = CHECKSUM_COMPLETE; |
| } else |
| myri10ge_vlan_ip_csum(skb, csum); |
| } |
| netif_receive_skb(skb); |
| 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_kfree_skb_irq(skb); |
| if (len) |
| pci_unmap_single(pdev, |
| dma_unmap_addr(&tx->info[idx], |
| bus), len, |
| PCI_DMA_TODEVICE); |
| } else { |
| if (len) |
| pci_unmap_page(pdev, |
| dma_unmap_addr(&tx->info[idx], |
| bus), len, |
| PCI_DMA_TODEVICE); |
| } |
| } |
| |
| 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(); |
| mmiowb(); |
| } |
| __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)) { |
| 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; |
| |
| /* |
| * Prevent compiler from generating more than one ->features memory |
| * access to avoid theoretical race condition with functions that |
| * change NETIF_F_LRO flag at runtime. |
| */ |
| bool lro_enabled = ACCESS_ONCE(mgp->dev->features) & NETIF_F_LRO; |
| |
| 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, lro_enabled); |
| 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; |
| |
| if (lro_enabled) |
| lro_flush_all(&rx_done->lro_mgr); |
| |
| /* 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) { |
| if (netif_msg_link(mgp)) |
| netdev_info(mgp->dev, "link up\n"); |
| netif_carrier_on(mgp->dev); |
| mgp->link_changes++; |
| } else { |
| if (netif_msg_link(mgp)) |
| netdev_info(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(napi); |
| 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_err(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_settings(struct net_device *netdev, struct ethtool_cmd *cmd) |
| { |
| struct myri10ge_priv *mgp = netdev_priv(netdev); |
| char *ptr; |
| int i; |
| |
| cmd->autoneg = AUTONEG_DISABLE; |
| ethtool_cmd_speed_set(cmd, SPEED_10000); |
| cmd->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->port = PORT_FIBRE; |
| cmd->supported |= SUPPORTED_FIBRE; |
| cmd->advertising |= ADVERTISED_FIBRE; |
| } else { |
| cmd->port = PORT_OTHER; |
| } |
| if (*ptr == 'R' || *ptr == 'S') |
| cmd->transceiver = XCVR_EXTERNAL; |
| else |
| cmd->transceiver = XCVR_INTERNAL; |
| |
| return 0; |
| } |
| |
| static void |
| myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info) |
| { |
| struct myri10ge_priv *mgp = netdev_priv(netdev); |
| |
| strlcpy(info->driver, "myri10ge", sizeof(info->driver)); |
| strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version)); |
| strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version)); |
| strlcpy(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 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 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 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", "WC", "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", "LRO aggregated", |
| "LRO flushed", |
| "LRO avg aggr", "LRO no_desc" |
| }; |
| |
| #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->wc_enabled; |
| 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; |
| data[i++] = ss->rx_done.lro_mgr.stats.aggregated; |
| data[i++] = ss->rx_done.lro_mgr.stats.flushed; |
| if (ss->rx_done.lro_mgr.stats.flushed) |
| data[i++] = ss->rx_done.lro_mgr.stats.aggregated / |
| ss->rx_done.lro_mgr.stats.flushed; |
| else |
| data[i++] = 0; |
| data[i++] = ss->rx_done.lro_mgr.stats.no_desc; |
| } |
| } |
| |
| 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; |
| } |
| |
| static const struct ethtool_ops myri10ge_ethtool_ops = { |
| .get_settings = myri10ge_get_settings, |
| .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, |
| }; |
| |
| 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; |
| 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: |
| 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); |
| } |
| |
| 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) |
| pci_unmap_single(mgp->pdev, |
| dma_unmap_addr(&tx->info[idx], |
| bus), len, |
| PCI_DMA_TODEVICE); |
| } else { |
| if (len) |
| pci_unmap_page(mgp->pdev, |
| dma_unmap_addr(&tx->info[idx], |
| bus), len, |
| PCI_DMA_TODEVICE); |
| } |
| } |
| 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(pdev, mgp->msix_vectors, |
| mgp->num_slices); |
| if (status == 0) { |
| mgp->msix_enabled = 1; |
| } else { |
| dev_err(&pdev->dev, |
| "Error %d setting up MSI-X\n", status); |
| return status; |
| } |
| } |
| 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_frag_header(struct skb_frag_struct *frag, void **mac_hdr, |
| void **ip_hdr, void **tcpudp_hdr, |
| u64 * hdr_flags, void *priv) |
| { |
| struct ethhdr *eh; |
| struct vlan_ethhdr *veh; |
| struct iphdr *iph; |
| u8 *va = page_address(frag->page) + frag->page_offset; |
| unsigned long ll_hlen; |
| /* passed opaque through lro_receive_frags() */ |
| __wsum csum = (__force __wsum) (unsigned long)priv; |
| |
| /* find the mac header, aborting if not IPv4 */ |
| |
| eh = (struct ethhdr *)va; |
| *mac_hdr = eh; |
| ll_hlen = ETH_HLEN; |
| if (eh->h_proto != htons(ETH_P_IP)) { |
| if (eh->h_proto == htons(ETH_P_8021Q)) { |
| veh = (struct vlan_ethhdr *)va; |
| if (veh->h_vlan_encapsulated_proto != htons(ETH_P_IP)) |
| return -1; |
| |
| ll_hlen += VLAN_HLEN; |
| |
| /* |
| * HW checksum starts ETH_HLEN bytes into |
| * frame, so we must subtract off the VLAN |
| * header's checksum before csum can be used |
| */ |
| csum = csum_sub(csum, csum_partial(va + ETH_HLEN, |
| VLAN_HLEN, 0)); |
| } else { |
| return -1; |
| } |
| } |
| *hdr_flags = LRO_IPV4; |
| |
| iph = (struct iphdr *)(va + ll_hlen); |
| *ip_hdr = iph; |
| if (iph->protocol != IPPROTO_TCP) |
| return -1; |
| if (ip_is_fragment(iph)) |
| return -1; |
| *hdr_flags |= LRO_TCP; |
| *tcpudp_hdr = (u8 *) (*ip_hdr) + (iph->ihl << 2); |
| |
| /* verify the IP checksum */ |
| if (unlikely(ip_fast_csum((u8 *) iph, iph->ihl))) |
| return -1; |
| |
| /* verify the checksum */ |
| if (unlikely(csum_tcpudp_magic(iph->saddr, iph->daddr, |
| ntohs(iph->tot_len) - (iph->ihl << 2), |
| IPPROTO_TCP, csum))) |
| return -1; |
| |
| return 0; |
| } |
| |
| 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 *itable; |
| struct net_lro_mgr *lro_mgr; |
| |
| 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; |
| } |
| |
| lro_mgr = &ss->rx_done.lro_mgr; |
| lro_mgr->dev = dev; |
| lro_mgr->features = LRO_F_NAPI; |
| lro_mgr->ip_summed = CHECKSUM_COMPLETE; |
| lro_mgr->ip_summed_aggr = CHECKSUM_UNNECESSARY; |
| lro_mgr->max_desc = MYRI10GE_MAX_LRO_DESCRIPTORS; |
| lro_mgr->lro_arr = ss->rx_done.lro_desc; |
| lro_mgr->get_frag_header = myri10ge_get_frag_header; |
| lro_mgr->max_aggr = myri10ge_lro_max_pkts; |
| lro_mgr->frag_align_pad = 2; |
| if (lro_mgr->max_aggr > MAX_SKB_FRAGS) |
| lro_mgr->max_aggr = MAX_SKB_FRAGS; |
| |
| /* 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(); |
| } |
| |
| /* |
| * 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; |
| struct skb_frag_struct *frag; |
| struct netdev_queue *netdev_queue; |
| dma_addr_t bus; |
| u32 low; |
| __be32 high_swapped; |
| unsigned int len; |
| int idx, last_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_transport_offset(skb) + tcp_hdrlen(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 (unlikely(skb->len < ETH_ZLEN)) { |
| if (skb_padto(skb, ETH_ZLEN)) { |
| /* The packet is gone, so we must |
| * return 0 */ |
| ss->stats.tx_dropped += 1; |
| return NETDEV_TX_OK; |
| } |
| /* adjust the len to account for the zero pad |
| * so that the nic can know how long it is */ |
| skb->len = ETH_ZLEN; |
| } |
| } |
| |
| /* map the skb for DMA */ |
| len = skb_headlen(skb); |
| idx = tx->req & tx->mask; |
| tx->info[idx].skb = skb; |
| bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE); |
| 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 */ |
| idx = (count + tx->req) & tx->mask; |
| frag = &skb_shinfo(skb)->frags[frag_idx]; |
| frag_idx++; |
| len = frag->size; |
| bus = pci_map_page(mgp->pdev, frag->page, frag->page_offset, |
| len, PCI_DMA_TODEVICE); |
| 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(); |
| mmiowb(); |
| } |
| 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: |
| /* Free any DMA resources we've alloced and clear out the skb |
| * slot so as to not trip up assertions, and to avoid a |
| * double-free if linearizing fails */ |
| |
| last_idx = (idx + 1) & tx->mask; |
| idx = tx->req & tx->mask; |
| tx->info[idx].skb = NULL; |
| do { |
| len = dma_unmap_len(&tx->info[idx], len); |
| if (len) { |
| if (tx->info[idx].skb != NULL) |
| pci_unmap_single(mgp->pdev, |
| dma_unmap_addr(&tx->info[idx], |
| bus), len, |
| PCI_DMA_TODEVICE); |
| else |
| pci_unmap_page(mgp->pdev, |
| dma_unmap_addr(&tx->info[idx], |
| bus), len, |
| PCI_DMA_TODEVICE); |
| dma_unmap_len_set(&tx->info[idx], len, 0); |
| tx->info[idx].skb = NULL; |
| } |
| idx = (idx + 1) & tx->mask; |
| } while (idx != last_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; |
| 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; |
| |
| while (segs) { |
| curr = segs; |
| segs = segs->next; |
| curr->next = NULL; |
| status = myri10ge_xmit(curr, dev); |
| if (status != 0) { |
| dev_kfree_skb_any(curr); |
| if (segs != NULL) { |
| curr = segs; |
| segs = segs->next; |
| curr->next = NULL; |
| dev_kfree_skb_any(segs); |
| } |
| 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 struct rtnl_link_stats64 *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; |
| } |
| return stats; |
| } |
| |
| 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, 6); |
| 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 */ |
| memcpy(dev->dev_addr, sa->sa_data, 6); |
| return 0; |
| } |
| |
| static u32 myri10ge_fix_features(struct net_device *dev, u32 features) |
| { |
| if (!(features & NETIF_F_RXCSUM)) |
| features &= ~NETIF_F_LRO; |
| |
| return features; |
| } |
| |
| static int myri10ge_change_mtu(struct net_device *dev, int new_mtu) |
| { |
| struct myri10ge_priv *mgp = netdev_priv(dev); |
| int error = 0; |
| |
| if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) { |
| netdev_err(dev, "new mtu (%d) is not valid\n", new_mtu); |
| return -EINVAL; |
| } |
| 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 error; |
| } |
| |
| /* |
| * 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; |
| unsigned cap; |
| unsigned err_cap; |
| u16 val; |
| u8 ext_type; |
| int ret; |
| |
| if (!myri10ge_ecrc_enable || !bridge) |
| return; |
| |
| /* check that the bridge is a root port */ |
| cap = pci_find_capability(bridge, PCI_CAP_ID_EXP); |
| pci_read_config_word(bridge, cap + PCI_CAP_FLAGS, &val); |
| ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4; |
| if (ext_type != 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; |
| } |
| cap = |
| pci_find_capability(bridge, PCI_CAP_ID_EXP); |
| pci_read_config_word(bridge, |
| cap + PCI_CAP_FLAGS, &val); |
| ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4; |
| } while (ext_type != 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, exp_cap; |
| u16 lnk; |
| |
| exp_cap = pci_find_capability(mgp->pdev, PCI_CAP_ID_EXP); |
| pci_read_config_word(mgp->pdev, exp_cap + 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); |
| } |
| } |
| |
| kparam_block_sysfs_write(myri10ge_fw_name); |
| 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); |
| } |
| } |
| kparam_unblock_sysfs_write(myri10ge_fw_name); |
| |
| 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); |
| } |
| |
| #ifdef CONFIG_PM |
| static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state) |
| { |
| struct myri10ge_priv *mgp; |
| struct net_device *netdev; |
| |
| mgp = pci_get_drvdata(pdev); |
| 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); |
| pci_save_state(pdev); |
| pci_disable_device(pdev); |
| |
| return pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
| } |
| |
| static int myri10ge_resume(struct pci_dev *pdev) |
| { |
| 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; |
| pci_set_power_state(pdev, 0); /* zeros conf space as a side effect */ |
| 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; |
| } |
| |
| pci_restore_state(pdev); |
| |
| status = pci_enable_device(pdev); |
| if (status) { |
| dev_err(&pdev->dev, "failed to enable device\n"); |
| return status; |
| } |
| |
| pci_set_master(pdev); |
| |
| myri10ge_reset(mgp); |
| myri10ge_dummy_rdma(mgp, 1); |
| |
| /* Save configuration space to be restored if the |
| * nic resets due to a parity error */ |
| pci_save_state(pdev); |
| |
| 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: |
| pci_disable_device(pdev); |
| return -EIO; |
| |
| } |
| #endif /* CONFIG_PM */ |
| |
| 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; |
| } |
| |
| /* |
| * 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_tx_buf *tx; |
| u32 reboot; |
| int status, rebooted; |
| int i; |
| 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. Try to reset */ |
| |
| netdev_err(mgp->dev, "device timeout, resetting\n"); |
| for (i = 0; i < mgp->num_slices; i++) { |
| tx = &mgp->ss[i].tx; |
| netdev_err(mgp->dev, "(%d): %d %d %d %d %d %d\n", |
| i, tx->queue_active, tx->req, |
| tx->done, tx->pkt_start, tx->pkt_done, |
| (int)ntohl(mgp->ss[i].fw_stats-> |
| send_done_count)); |
| msleep(2000); |
| netdev_info(mgp->dev, "(%d): %d %d %d %d %d %d\n", |
| i, tx->queue_active, tx->req, |
| tx->done, tx->pkt_start, tx->pkt_done, |
| (int)ntohl(mgp->ss[i].fw_stats-> |
| send_done_count)); |
| } |
| } |
| |
| 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(unsigned long arg) |
| { |
| struct myri10ge_priv *mgp; |
| struct myri10ge_slice_state *ss; |
| int i, reset_needed, busy_slice_cnt; |
| u32 rx_pause_cnt; |
| u16 cmd; |
| |
| mgp = (struct myri10ge_priv *)arg; |
| |
| 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; |
| } |
| |
| 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_err(mgp->dev, "slice %d: TX paused, check link partner\n", |
| i); |
| } else { |
| netdev_warn(mgp->dev, "slice %d stuck:", i); |
| reset_needed = 1; |
| } |
| } |
| if (ss->watchdog_tx_done != ss->tx.done || |
| ss->watchdog_rx_done != ss->rx_done.cnt) { |
| busy_slice_cnt++; |
| } |
| ss->watchdog_tx_done = ss->tx.done; |
| ss->watchdog_tx_req = ss->tx.req; |
| ss->watchdog_rx_done = ss->rx_done.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); |
| } |
| } |
| 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; |
| memset(ss->rx_done.entry, 0, bytes); |
| 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(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, msix_cap; |
| |
| mgp->num_slices = 1; |
| msix_cap = pci_find_capability(pdev, PCI_CAP_ID_MSIX); |
| ncpus = num_online_cpus(); |
| |
| if (myri10ge_max_slices == 1 || msix_cap == 0 || |
| (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 disable_msix; |
| for (i = 0; i < mgp->num_slices; i++) { |
| mgp->msix_vectors[i].entry = i; |
| } |
| |
| while (mgp->num_slices > 1) { |
| /* make sure it is a power of two */ |
| while (!is_power_of_2(mgp->num_slices)) |
| mgp->num_slices--; |
| if (mgp->num_slices == 1) |
| goto disable_msix; |
| status = pci_enable_msix(pdev, mgp->msix_vectors, |
| mgp->num_slices); |
| if (status == 0) { |
| pci_disable_msix(pdev); |
| if (old_allocated) |
| kfree(old_fw); |
| return; |
| } |
| if (status > 0) |
| mgp->num_slices = status; |
| else |
| goto disable_msix; |
| } |
| |
| disable_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_fix_features = myri10ge_fix_features, |
| .ndo_set_multicast_list = 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 i; |
| int status = -ENXIO; |
| int dac_enabled; |
| unsigned hdr_offset, ss_offset; |
| static int board_number; |
| |
| netdev = alloc_etherdev_mq(sizeof(*mgp), MYRI10GE_MAX_SLICES); |
| if (netdev == NULL) { |
| dev_err(dev, "Could not allocate ethernet device\n"); |
| 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; |
| } |
| |
| pci_set_master(pdev); |
| dac_enabled = 1; |
| status = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); |
| if (status != 0) { |
| dac_enabled = 0; |
| dev_err(&pdev->dev, |
| "64-bit pci address mask was refused, " |
| "trying 32-bit\n"); |
| status = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
| } |
| if (status != 0) { |
| dev_err(&pdev->dev, "Error %d setting DMA mask\n", status); |
| goto abort_with_enabled; |
| } |
| (void)pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); |
| mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd), |
| &mgp->cmd_bus, GFP_KERNEL); |
| if (mgp->cmd == NULL) |
| goto abort_with_enabled; |
| |
| mgp->board_span = pci_resource_len(pdev, 0); |
| mgp->iomem_base = pci_resource_start(pdev, 0); |
| mgp->mtrr = -1; |
| mgp->wc_enabled = 0; |
| #ifdef CONFIG_MTRR |
| mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span, |
| MTRR_TYPE_WRCOMB, 1); |
| if (mgp->mtrr >= 0) |
| mgp->wc_enabled = 1; |
| #endif |
| 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 = |
| ntohl(__raw_readl(mgp->sram + MCP_HEADER_PTR_OFFSET)) & 0xffffc; |
| ss_offset = hdr_offset + offsetof(struct mcp_gen_header, string_specs); |
| mgp->sram_size = ntohl(__raw_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); |
| 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; |
| |
| for (i = 0; i < ETH_ALEN; i++) |
| netdev->dev_addr[i] = mgp->mac_addr[i]; |
| |
| 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); |
| if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU) |
| myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN; |
| if ((myri10ge_initial_mtu + ETH_HLEN) < 68) |
| myri10ge_initial_mtu = 68; |
| |
| netdev->netdev_ops = &myri10ge_netdev_ops; |
| netdev->mtu = myri10ge_initial_mtu; |
| netdev->base_addr = mgp->iomem_base; |
| netdev->hw_features = mgp->features | NETIF_F_LRO | NETIF_F_RXCSUM; |
| netdev->features = netdev->hw_features; |
| |
| if (dac_enabled) |
| netdev->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). Also ensure netdev->irq |
| * is set to correct value if MSI is enabled */ |
| status = myri10ge_request_irq(mgp); |
| if (status != 0) |
| goto abort_with_firmware; |
| netdev->irq = pdev->irq; |
| 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 */ |
| setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer, |
| (unsigned long)mgp); |
| |
| SET_ETHTOOL_OPS(netdev, &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, WC %s\n", |
| mgp->num_slices, mgp->tx_boundary, mgp->fw_name, |
| (mgp->wc_enabled ? "Enabled" : "Disabled")); |
| else |
| dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n", |
| mgp->msi_enabled ? "MSI" : "xPIC", |
| netdev->irq, mgp->tx_boundary, mgp->fw_name, |
| (mgp->wc_enabled ? "Enabled" : "Disabled")); |
| |
| board_number++; |
| return 0; |
| |
| abort_with_state: |
| pci_restore_state(pdev); |
| |
| abort_with_slices: |
| myri10ge_free_slices(mgp); |
| |
| abort_with_firmware: |
| 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: |
| #ifdef CONFIG_MTRR |
| if (mgp->mtrr >= 0) |
| mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span); |
| #endif |
| 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); |
| |
| #ifdef CONFIG_MTRR |
| if (mgp->mtrr >= 0) |
| mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span); |
| #endif |
| myri10ge_free_slices(mgp); |
| if (mgp->msix_vectors != NULL) |
| 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); |
| pci_set_drvdata(pdev, NULL); |
| } |
| |
| #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E 0x0008 |
| #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9 0x0009 |
| |
| static DEFINE_PCI_DEVICE_TABLE(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 struct pci_driver myri10ge_driver = { |
| .name = "myri10ge", |
| .probe = myri10ge_probe, |
| .remove = myri10ge_remove, |
| .id_table = myri10ge_pci_tbl, |
| #ifdef CONFIG_PM |
| .suspend = myri10ge_suspend, |
| .resume = myri10ge_resume, |
| #endif |
| }; |
| |
| #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); |