diff options
Diffstat (limited to 'drivers/net/ethernet/myricom/myri10ge/myri10ge.c')
| -rw-r--r-- | drivers/net/ethernet/myricom/myri10ge/myri10ge.c | 4097 |
1 files changed, 4097 insertions, 0 deletions
diff --git a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c new file mode 100644 index 000000000..3bc570c46 --- /dev/null +++ b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c @@ -0,0 +1,4097 @@ +/************************************************************************* + * myri10ge.c: Myricom Myri-10G Ethernet driver. + * + * Copyright (C) 2005 - 2011 Myricom, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Myricom, Inc. nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + * + * If the eeprom on your board is not recent enough, you will need to get a + * newer firmware image at: + * http://www.myri.com/scs/download-Myri10GE.html + * + * Contact Information: + * <help@myri.com> + * Myricom, Inc., 325N Santa Anita Avenue, Arcadia, CA 91006 + *************************************************************************/ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/tcp.h> +#include <linux/netdevice.h> +#include <linux/skbuff.h> +#include <linux/string.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/dma-mapping.h> +#include <linux/etherdevice.h> +#include <linux/if_ether.h> +#include <linux/if_vlan.h> +#include <linux/dca.h> +#include <linux/ip.h> +#include <linux/inet.h> +#include <linux/in.h> +#include <linux/ethtool.h> +#include <linux/firmware.h> +#include <linux/delay.h> +#include <linux/timer.h> +#include <linux/vmalloc.h> +#include <linux/crc32.h> +#include <linux/moduleparam.h> +#include <linux/io.h> +#include <linux/log2.h> +#include <linux/slab.h> +#include <linux/prefetch.h> +#include <net/checksum.h> +#include <net/ip.h> +#include <net/tcp.h> +#include <asm/byteorder.h> +#include <asm/processor.h> +#include <net/busy_poll.h> + +#include "myri10ge_mcp.h" +#include "myri10ge_mcp_gen_header.h" + +#define MYRI10GE_VERSION_STR "1.5.3-1.534" + +MODULE_DESCRIPTION("Myricom 10G driver (10GbE)"); +MODULE_AUTHOR("Maintainer: help@myri.com"); +MODULE_VERSION(MYRI10GE_VERSION_STR); +MODULE_LICENSE("Dual BSD/GPL"); + +#define MYRI10GE_MAX_ETHER_MTU 9014 + +#define MYRI10GE_ETH_STOPPED 0 +#define MYRI10GE_ETH_STOPPING 1 +#define MYRI10GE_ETH_STARTING 2 +#define MYRI10GE_ETH_RUNNING 3 +#define MYRI10GE_ETH_OPEN_FAILED 4 + +#define MYRI10GE_EEPROM_STRINGS_SIZE 256 +#define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2) + +#define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff) +#define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff + +#define MYRI10GE_ALLOC_ORDER 0 +#define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE) +#define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1) + +#define MYRI10GE_MAX_SLICES 32 + +struct myri10ge_rx_buffer_state { + struct page *page; + int page_offset; + DEFINE_DMA_UNMAP_ADDR(bus); + DEFINE_DMA_UNMAP_LEN(len); +}; + +struct myri10ge_tx_buffer_state { + struct sk_buff *skb; + int last; + DEFINE_DMA_UNMAP_ADDR(bus); + DEFINE_DMA_UNMAP_LEN(len); +}; + +struct myri10ge_cmd { + u32 data0; + u32 data1; + u32 data2; +}; + +struct myri10ge_rx_buf { + struct mcp_kreq_ether_recv __iomem *lanai; /* lanai ptr for recv ring */ + struct mcp_kreq_ether_recv *shadow; /* host shadow of recv ring */ + struct myri10ge_rx_buffer_state *info; + struct page *page; + dma_addr_t bus; + int page_offset; + int cnt; + int fill_cnt; + int alloc_fail; + int mask; /* number of rx slots -1 */ + int watchdog_needed; +}; + +struct myri10ge_tx_buf { + struct mcp_kreq_ether_send __iomem *lanai; /* lanai ptr for sendq */ + __be32 __iomem *send_go; /* "go" doorbell ptr */ + __be32 __iomem *send_stop; /* "stop" doorbell ptr */ + struct mcp_kreq_ether_send *req_list; /* host shadow of sendq */ + char *req_bytes; + struct myri10ge_tx_buffer_state *info; + int mask; /* number of transmit slots -1 */ + int req ____cacheline_aligned; /* transmit slots submitted */ + int pkt_start; /* packets started */ + int stop_queue; + int linearized; + int done ____cacheline_aligned; /* transmit slots completed */ + int pkt_done; /* packets completed */ + int wake_queue; + int queue_active; +}; + +struct myri10ge_rx_done { + struct mcp_slot *entry; + dma_addr_t bus; + int cnt; + int idx; +}; + +struct myri10ge_slice_netstats { + unsigned long rx_packets; + unsigned long tx_packets; + unsigned long rx_bytes; + unsigned long tx_bytes; + unsigned long rx_dropped; + unsigned long tx_dropped; +}; + +struct myri10ge_slice_state { + struct myri10ge_tx_buf tx; /* transmit ring */ + struct myri10ge_rx_buf rx_small; + struct myri10ge_rx_buf rx_big; + struct myri10ge_rx_done rx_done; + struct net_device *dev; + struct napi_struct napi; + struct myri10ge_priv *mgp; + struct myri10ge_slice_netstats stats; + __be32 __iomem *irq_claim; + struct mcp_irq_data *fw_stats; + dma_addr_t fw_stats_bus; + int watchdog_tx_done; + int watchdog_tx_req; + int watchdog_rx_done; + int stuck; +#ifdef CONFIG_MYRI10GE_DCA + int cached_dca_tag; + int cpu; + __be32 __iomem *dca_tag; +#endif + char irq_desc[32]; +}; + +struct myri10ge_priv { + struct myri10ge_slice_state *ss; + int tx_boundary; /* boundary transmits cannot cross */ + int num_slices; + int running; /* running? */ + int small_bytes; + int big_bytes; + int max_intr_slots; + struct net_device *dev; + u8 __iomem *sram; + int sram_size; + unsigned long board_span; + unsigned long iomem_base; + __be32 __iomem *irq_deassert; + char *mac_addr_string; + struct mcp_cmd_response *cmd; + dma_addr_t cmd_bus; + struct pci_dev *pdev; + int msi_enabled; + int msix_enabled; + struct msix_entry *msix_vectors; +#ifdef CONFIG_MYRI10GE_DCA + int dca_enabled; + int relaxed_order; +#endif + u32 link_state; + unsigned int rdma_tags_available; + int intr_coal_delay; + __be32 __iomem *intr_coal_delay_ptr; + int wc_cookie; + int down_cnt; + wait_queue_head_t down_wq; + struct work_struct watchdog_work; + struct timer_list watchdog_timer; + int watchdog_resets; + int watchdog_pause; + int pause; + bool fw_name_allocated; + char *fw_name; + char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE]; + char *product_code_string; + char fw_version[128]; + int fw_ver_major; + int fw_ver_minor; + int fw_ver_tiny; + int adopted_rx_filter_bug; + u8 mac_addr[ETH_ALEN]; /* eeprom mac address */ + unsigned long serial_number; + int vendor_specific_offset; + int fw_multicast_support; + u32 features; + u32 max_tso6; + u32 read_dma; + u32 write_dma; + u32 read_write_dma; + u32 link_changes; + u32 msg_enable; + unsigned int board_number; + int rebooted; +}; + +static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat"; +static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat"; +static char *myri10ge_fw_rss_unaligned = "myri10ge_rss_ethp_z8e.dat"; +static char *myri10ge_fw_rss_aligned = "myri10ge_rss_eth_z8e.dat"; +MODULE_FIRMWARE("myri10ge_ethp_z8e.dat"); +MODULE_FIRMWARE("myri10ge_eth_z8e.dat"); +MODULE_FIRMWARE("myri10ge_rss_ethp_z8e.dat"); +MODULE_FIRMWARE("myri10ge_rss_eth_z8e.dat"); + +/* Careful: must be accessed under kernel_param_lock() */ +static char *myri10ge_fw_name = NULL; +module_param(myri10ge_fw_name, charp, 0644); +MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name"); + +#define MYRI10GE_MAX_BOARDS 8 +static char *myri10ge_fw_names[MYRI10GE_MAX_BOARDS] = + {[0 ... (MYRI10GE_MAX_BOARDS - 1)] = NULL }; +module_param_array_named(myri10ge_fw_names, myri10ge_fw_names, charp, NULL, + 0444); +MODULE_PARM_DESC(myri10ge_fw_names, "Firmware image names per board"); + +static int myri10ge_ecrc_enable = 1; +module_param(myri10ge_ecrc_enable, int, 0444); +MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E"); + +static int myri10ge_small_bytes = -1; /* -1 == auto */ +module_param(myri10ge_small_bytes, int, 0644); +MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets"); + +static int myri10ge_msi = 1; /* enable msi by default */ +module_param(myri10ge_msi, int, 0644); +MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts"); + +static int myri10ge_intr_coal_delay = 75; +module_param(myri10ge_intr_coal_delay, int, 0444); +MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay"); + +static int myri10ge_flow_control = 1; +module_param(myri10ge_flow_control, int, 0444); +MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter"); + +static int myri10ge_deassert_wait = 1; +module_param(myri10ge_deassert_wait, int, 0644); +MODULE_PARM_DESC(myri10ge_deassert_wait, + "Wait when deasserting legacy interrupts"); + +static int myri10ge_force_firmware = 0; +module_param(myri10ge_force_firmware, int, 0444); +MODULE_PARM_DESC(myri10ge_force_firmware, + "Force firmware to assume aligned completions"); + +static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN; +module_param(myri10ge_initial_mtu, int, 0444); +MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU"); + +static int myri10ge_napi_weight = 64; +module_param(myri10ge_napi_weight, int, 0444); +MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight"); + +static int myri10ge_watchdog_timeout = 1; +module_param(myri10ge_watchdog_timeout, int, 0444); +MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout"); + +static int myri10ge_max_irq_loops = 1048576; +module_param(myri10ge_max_irq_loops, int, 0444); +MODULE_PARM_DESC(myri10ge_max_irq_loops, + "Set stuck legacy IRQ detection threshold"); + +#define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK + +static int myri10ge_debug = -1; /* defaults above */ +module_param(myri10ge_debug, int, 0); +MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)"); + +static int myri10ge_fill_thresh = 256; +module_param(myri10ge_fill_thresh, int, 0644); +MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed"); + +static int myri10ge_reset_recover = 1; + +static int myri10ge_max_slices = 1; +module_param(myri10ge_max_slices, int, 0444); +MODULE_PARM_DESC(myri10ge_max_slices, "Max tx/rx queues"); + +static int myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_DST_PORT; +module_param(myri10ge_rss_hash, int, 0444); +MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do"); + +static int myri10ge_dca = 1; +module_param(myri10ge_dca, int, 0444); +MODULE_PARM_DESC(myri10ge_dca, "Enable DCA if possible"); + +#define MYRI10GE_FW_OFFSET 1024*1024 +#define MYRI10GE_HIGHPART_TO_U32(X) \ +(sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0) +#define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X)) + +#define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8) + +static void myri10ge_set_multicast_list(struct net_device *dev); +static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb, + struct net_device *dev); + +static inline void put_be32(__be32 val, __be32 __iomem * p) +{ + __raw_writel((__force __u32) val, (__force void __iomem *)p); +} + +static void myri10ge_get_stats(struct net_device *dev, + struct rtnl_link_stats64 *stats); + +static void set_fw_name(struct myri10ge_priv *mgp, char *name, bool allocated) +{ + if (mgp->fw_name_allocated) + kfree(mgp->fw_name); + mgp->fw_name = name; + mgp->fw_name_allocated = allocated; +} + +static int +myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd, + struct myri10ge_cmd *data, int atomic) +{ + struct mcp_cmd *buf; + char buf_bytes[sizeof(*buf) + 8]; + struct mcp_cmd_response *response = mgp->cmd; + char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD; + u32 dma_low, dma_high, result, value; + int sleep_total = 0; + + /* ensure buf is aligned to 8 bytes */ + buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8); + + buf->data0 = htonl(data->data0); + buf->data1 = htonl(data->data1); + buf->data2 = htonl(data->data2); + buf->cmd = htonl(cmd); + dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus); + dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus); + + buf->response_addr.low = htonl(dma_low); + buf->response_addr.high = htonl(dma_high); + response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT); + mb(); + myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf)); + + /* wait up to 15ms. Longest command is the DMA benchmark, + * which is capped at 5ms, but runs from a timeout handler + * that runs every 7.8ms. So a 15ms timeout leaves us with + * a 2.2ms margin + */ + if (atomic) { + /* if atomic is set, do not sleep, + * and try to get the completion quickly + * (1ms will be enough for those commands) */ + for (sleep_total = 0; + sleep_total < 1000 && + response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT); + sleep_total += 10) { + udelay(10); + mb(); + } + } else { + /* use msleep for most command */ + for (sleep_total = 0; + sleep_total < 15 && + response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT); + sleep_total++) + msleep(1); + } + + result = ntohl(response->result); + value = ntohl(response->data); + if (result != MYRI10GE_NO_RESPONSE_RESULT) { + if (result == 0) { + data->data0 = value; + return 0; + } else if (result == MXGEFW_CMD_UNKNOWN) { + return -ENOSYS; + } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) { + return -E2BIG; + } else if (result == MXGEFW_CMD_ERROR_RANGE && + cmd == MXGEFW_CMD_ENABLE_RSS_QUEUES && + (data-> + data1 & MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES) != + 0) { + return -ERANGE; + } else { + dev_err(&mgp->pdev->dev, + "command %d failed, result = %d\n", + cmd, result); + return -ENXIO; + } + } + + dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n", + cmd, result); + return -EAGAIN; +} + +/* + * The eeprom strings on the lanaiX have the format + * SN=x\0 + * MAC=x:x:x:x:x:x\0 + * PT:ddd mmm xx xx:xx:xx xx\0 + * PV:ddd mmm xx xx:xx:xx xx\0 + */ +static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp) +{ + char *ptr, *limit; + int i; + + ptr = mgp->eeprom_strings; + limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE; + + while (*ptr != '\0' && ptr < limit) { + if (memcmp(ptr, "MAC=", 4) == 0) { + ptr += 4; + mgp->mac_addr_string = ptr; + for (i = 0; i < 6; i++) { + if ((ptr + 2) > limit) + goto abort; + mgp->mac_addr[i] = + simple_strtoul(ptr, &ptr, 16); + ptr += 1; + } + } + if (memcmp(ptr, "PC=", 3) == 0) { + ptr += 3; + mgp->product_code_string = ptr; + } + if (memcmp((const void *)ptr, "SN=", 3) == 0) { + ptr += 3; + mgp->serial_number = simple_strtoul(ptr, &ptr, 10); + } + while (ptr < limit && *ptr++) ; + } + + return 0; + +abort: + dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n"); + return -ENXIO; +} + +/* + * Enable or disable periodic RDMAs from the host to make certain + * chipsets resend dropped PCIe messages + */ + +static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable) +{ + char __iomem *submit; + __be32 buf[16] __attribute__ ((__aligned__(8))); + u32 dma_low, dma_high; + int i; + + /* clear confirmation addr */ + mgp->cmd->data = 0; + mb(); + + /* send a rdma command to the PCIe engine, and wait for the + * response in the confirmation address. The firmware should + * write a -1 there to indicate it is alive and well + */ + dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus); + dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus); + + buf[0] = htonl(dma_high); /* confirm addr MSW */ + buf[1] = htonl(dma_low); /* confirm addr LSW */ + buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */ + buf[3] = htonl(dma_high); /* dummy addr MSW */ + buf[4] = htonl(dma_low); /* dummy addr LSW */ + buf[5] = htonl(enable); /* enable? */ + + submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA; + + myri10ge_pio_copy(submit, &buf, sizeof(buf)); + for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++) + msleep(1); + if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) + dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n", + (enable ? "enable" : "disable")); +} + +static int +myri10ge_validate_firmware(struct myri10ge_priv *mgp, + struct mcp_gen_header *hdr) +{ + struct device *dev = &mgp->pdev->dev; + + /* check firmware type */ + if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) { + dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type)); + return -EINVAL; + } + + /* save firmware version for ethtool */ + strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version)); + mgp->fw_version[sizeof(mgp->fw_version) - 1] = '\0'; + + 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) + 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); + if (unlikely(pci_dma_mapping_error(mgp->pdev, dmatest_bus))) { + __free_page(dmatest_page); + return -ENOMEM; + } + + /* Run a small DMA test. + * The magic multipliers to the length tell the firmware + * to do DMA read, write, or read+write tests. The + * results are returned in cmd.data0. The upper 16 + * bits or the return is the number of transfers completed. + * The lower 16 bits is the time in 0.5us ticks that the + * transfers took to complete. + */ + + len = mgp->tx_boundary; + + cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus); + cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus); + cmd.data2 = len * 0x10000; + status = myri10ge_send_cmd(mgp, test_type, &cmd, 0); + if (status != 0) { + test = "read"; + goto abort; + } + mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff); + cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus); + cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus); + cmd.data2 = len * 0x1; + status = myri10ge_send_cmd(mgp, test_type, &cmd, 0); + if (status != 0) { + test = "write"; + goto abort; + } + mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff); + + cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus); + cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus); + cmd.data2 = len * 0x10001; + status = myri10ge_send_cmd(mgp, test_type, &cmd, 0); + if (status != 0) { + test = "read/write"; + goto abort; + } + mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) / + (cmd.data0 & 0xffff); + +abort: + 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; + u16 ctl; + + pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &ctl); + + ret = (ctl & PCI_EXP_DEVCTL_RELAX_EN) >> 4; + if (ret != on) { + ctl &= ~PCI_EXP_DEVCTL_RELAX_EN; + ctl |= (on << 4); + pcie_capability_write_word(pdev, PCI_EXP_DEVCTL, ctl); + } + return ret; +} + +static void +myri10ge_write_dca(struct myri10ge_slice_state *ss, int cpu, int tag) +{ + ss->cached_dca_tag = tag; + put_be32(htonl(tag), ss->dca_tag); +} + +static inline void myri10ge_update_dca(struct myri10ge_slice_state *ss) +{ + int cpu = get_cpu(); + int tag; + + if (cpu != ss->cpu) { + tag = dca3_get_tag(&ss->mgp->pdev->dev, cpu); + if (ss->cached_dca_tag != tag) + myri10ge_write_dca(ss, cpu, tag); + ss->cpu = cpu; + } + put_cpu(); +} + +static void myri10ge_setup_dca(struct myri10ge_priv *mgp) +{ + int err, i; + struct pci_dev *pdev = mgp->pdev; + + if (mgp->ss[0].dca_tag == NULL || mgp->dca_enabled) + return; + if (!myri10ge_dca) { + dev_err(&pdev->dev, "dca disabled by administrator\n"); + return; + } + err = dca_add_requester(&pdev->dev); + if (err) { + if (err != -ENODEV) + dev_err(&pdev->dev, + "dca_add_requester() failed, err=%d\n", err); + return; + } + mgp->relaxed_order = myri10ge_toggle_relaxed(pdev, 0); + mgp->dca_enabled = 1; + for (i = 0; i < mgp->num_slices; i++) { + mgp->ss[i].cpu = -1; + mgp->ss[i].cached_dca_tag = -1; + myri10ge_update_dca(&mgp->ss[i]); + } +} + +static void myri10ge_teardown_dca(struct myri10ge_priv *mgp) +{ + struct pci_dev *pdev = mgp->pdev; + + if (!mgp->dca_enabled) + return; + mgp->dca_enabled = 0; + if (mgp->relaxed_order) + myri10ge_toggle_relaxed(pdev, 1); + dca_remove_requester(&pdev->dev); +} + +static int myri10ge_notify_dca_device(struct device *dev, void *data) +{ + struct myri10ge_priv *mgp; + unsigned long event; + + mgp = dev_get_drvdata(dev); + event = *(unsigned long *)data; + + if (event == DCA_PROVIDER_ADD) + myri10ge_setup_dca(mgp); + else if (event == DCA_PROVIDER_REMOVE) + myri10ge_teardown_dca(mgp); + return 0; +} +#endif /* CONFIG_MYRI10GE_DCA */ + +static inline void +myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst, + struct mcp_kreq_ether_recv *src) +{ + __be32 low; + + low = src->addr_low; + src->addr_low = htonl(DMA_BIT_MASK(32)); + myri10ge_pio_copy(dst, src, 4 * sizeof(*src)); + mb(); + myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src)); + mb(); + src->addr_low = low; + put_be32(low, &dst->addr_low); + mb(); +} + +static 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 void +myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx, + int bytes, int watchdog) +{ + struct page *page; + dma_addr_t bus; + int idx; +#if MYRI10GE_ALLOC_SIZE > 4096 + int end_offset; +#endif + + if (unlikely(rx->watchdog_needed && !watchdog)) + return; + + /* try to refill entire ring */ + while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) { + idx = rx->fill_cnt & rx->mask; + if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) { + /* we can use part of previous page */ + get_page(rx->page); + } else { + /* we need a new page */ + page = + alloc_pages(GFP_ATOMIC | __GFP_COMP, + MYRI10GE_ALLOC_ORDER); + if (unlikely(page == NULL)) { + if (rx->fill_cnt - rx->cnt < 16) + rx->watchdog_needed = 1; + return; + } + + bus = pci_map_page(mgp->pdev, page, 0, + MYRI10GE_ALLOC_SIZE, + PCI_DMA_FROMDEVICE); + if (unlikely(pci_dma_mapping_error(mgp->pdev, bus))) { + __free_pages(page, MYRI10GE_ALLOC_ORDER); + if (rx->fill_cnt - rx->cnt < 16) + rx->watchdog_needed = 1; + return; + } + + rx->page = page; + rx->page_offset = 0; + rx->bus = bus; + + } + rx->info[idx].page = rx->page; + rx->info[idx].page_offset = rx->page_offset; + /* note that this is the address of the start of the + * page */ + dma_unmap_addr_set(&rx->info[idx], bus, rx->bus); + rx->shadow[idx].addr_low = + htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset); + rx->shadow[idx].addr_high = + htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus)); + + /* start next packet on a cacheline boundary */ + rx->page_offset += SKB_DATA_ALIGN(bytes); + +#if MYRI10GE_ALLOC_SIZE > 4096 + /* don't cross a 4KB boundary */ + end_offset = rx->page_offset + bytes - 1; + if ((unsigned)(rx->page_offset ^ end_offset) > 4095) + rx->page_offset = end_offset & ~4095; +#endif + rx->fill_cnt++; + + /* copy 8 descriptors to the firmware at a time */ + if ((idx & 7) == 7) { + myri10ge_submit_8rx(&rx->lanai[idx - 7], + &rx->shadow[idx - 7]); + } + } +} + +static inline void +myri10ge_unmap_rx_page(struct pci_dev *pdev, + struct myri10ge_rx_buffer_state *info, int bytes) +{ + /* unmap the recvd page if we're the only or last user of it */ + if (bytes >= MYRI10GE_ALLOC_SIZE / 2 || + (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) { + pci_unmap_page(pdev, (dma_unmap_addr(info, bus) + & ~(MYRI10GE_ALLOC_SIZE - 1)), + MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE); + } +} + +/* + * GRO does not support acceleration of tagged vlan frames, and + * this NIC does not support vlan tag offload, so we must pop + * the tag ourselves to be able to achieve GRO performance that + * is comparable to LRO. + */ + +static inline void +myri10ge_vlan_rx(struct net_device *dev, void *addr, struct sk_buff *skb) +{ + u8 *va; + struct vlan_ethhdr *veh; + struct skb_frag_struct *frag; + __wsum vsum; + + va = addr; + va += MXGEFW_PAD; + veh = (struct vlan_ethhdr *)va; + if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) == + NETIF_F_HW_VLAN_CTAG_RX && + veh->h_vlan_proto == htons(ETH_P_8021Q)) { + /* fixup csum if needed */ + if (skb->ip_summed == CHECKSUM_COMPLETE) { + vsum = csum_partial(va + ETH_HLEN, VLAN_HLEN, 0); + skb->csum = csum_sub(skb->csum, vsum); + } + /* pop tag */ + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(veh->h_vlan_TCI)); + memmove(va + VLAN_HLEN, va, 2 * ETH_ALEN); + skb->len -= VLAN_HLEN; + skb->data_len -= VLAN_HLEN; + frag = skb_shinfo(skb)->frags; + frag->page_offset += VLAN_HLEN; + skb_frag_size_set(frag, skb_frag_size(frag) - VLAN_HLEN); + } +} + +#define MYRI10GE_HLEN 64 /* Bytes to copy from page to skb linear memory */ + +static inline int +myri10ge_rx_done(struct myri10ge_slice_state *ss, int len, __wsum csum) +{ + struct myri10ge_priv *mgp = ss->mgp; + struct sk_buff *skb; + struct skb_frag_struct *rx_frags; + struct myri10ge_rx_buf *rx; + int i, idx, remainder, bytes; + struct pci_dev *pdev = mgp->pdev; + struct net_device *dev = mgp->dev; + u8 *va; + + if (len <= mgp->small_bytes) { + rx = &ss->rx_small; + bytes = mgp->small_bytes; + } else { + rx = &ss->rx_big; + bytes = mgp->big_bytes; + } + + len += MXGEFW_PAD; + idx = rx->cnt & rx->mask; + va = page_address(rx->info[idx].page) + rx->info[idx].page_offset; + prefetch(va); + + skb = napi_get_frags(&ss->napi); + if (unlikely(skb == NULL)) { + ss->stats.rx_dropped++; + for (i = 0, remainder = len; remainder > 0; i++) { + myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes); + put_page(rx->info[idx].page); + rx->cnt++; + idx = rx->cnt & rx->mask; + remainder -= MYRI10GE_ALLOC_SIZE; + } + return 0; + } + rx_frags = skb_shinfo(skb)->frags; + /* Fill skb_frag_struct(s) with data from our receive */ + for (i = 0, remainder = len; remainder > 0; i++) { + myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes); + skb_fill_page_desc(skb, i, rx->info[idx].page, + rx->info[idx].page_offset, + remainder < MYRI10GE_ALLOC_SIZE ? + remainder : MYRI10GE_ALLOC_SIZE); + rx->cnt++; + idx = rx->cnt & rx->mask; + remainder -= MYRI10GE_ALLOC_SIZE; + } + + /* remove padding */ + rx_frags[0].page_offset += MXGEFW_PAD; + rx_frags[0].size -= MXGEFW_PAD; + len -= MXGEFW_PAD; + + skb->len = len; + skb->data_len = len; + skb->truesize += len; + if (dev->features & NETIF_F_RXCSUM) { + skb->ip_summed = CHECKSUM_COMPLETE; + skb->csum = csum; + } + myri10ge_vlan_rx(mgp->dev, va, skb); + skb_record_rx_queue(skb, ss - &mgp->ss[0]); + + napi_gro_frags(&ss->napi); + + return 1; +} + +static inline void +myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index) +{ + struct pci_dev *pdev = ss->mgp->pdev; + struct myri10ge_tx_buf *tx = &ss->tx; + struct netdev_queue *dev_queue; + struct sk_buff *skb; + int idx, len; + + while (tx->pkt_done != mcp_index) { + idx = tx->done & tx->mask; + skb = tx->info[idx].skb; + + /* Mark as free */ + tx->info[idx].skb = NULL; + if (tx->info[idx].last) { + tx->pkt_done++; + tx->info[idx].last = 0; + } + tx->done++; + len = dma_unmap_len(&tx->info[idx], len); + dma_unmap_len_set(&tx->info[idx], len, 0); + if (skb) { + ss->stats.tx_bytes += skb->len; + ss->stats.tx_packets++; + dev_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) && + ss->mgp->running == MYRI10GE_ETH_RUNNING) { + tx->wake_queue++; + netif_tx_wake_queue(dev_queue); + } +} + +static inline int +myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget) +{ + struct myri10ge_rx_done *rx_done = &ss->rx_done; + struct myri10ge_priv *mgp = ss->mgp; + unsigned long rx_bytes = 0; + unsigned long rx_packets = 0; + unsigned long rx_ok; + int idx = rx_done->idx; + int cnt = rx_done->cnt; + int work_done = 0; + u16 length; + __wsum checksum; + + while (rx_done->entry[idx].length != 0 && work_done < budget) { + length = ntohs(rx_done->entry[idx].length); + rx_done->entry[idx].length = 0; + checksum = csum_unfold(rx_done->entry[idx].checksum); + rx_ok = myri10ge_rx_done(ss, length, checksum); + rx_packets += rx_ok; + rx_bytes += rx_ok * (unsigned long)length; + cnt++; + idx = cnt & (mgp->max_intr_slots - 1); + work_done++; + } + rx_done->idx = idx; + rx_done->cnt = cnt; + ss->stats.rx_packets += rx_packets; + ss->stats.rx_bytes += rx_bytes; + + /* restock receive rings if needed */ + if (ss->rx_small.fill_cnt - ss->rx_small.cnt < myri10ge_fill_thresh) + myri10ge_alloc_rx_pages(mgp, &ss->rx_small, + mgp->small_bytes + MXGEFW_PAD, 0); + if (ss->rx_big.fill_cnt - ss->rx_big.cnt < myri10ge_fill_thresh) + myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0); + + return work_done; +} + +static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp) +{ + struct mcp_irq_data *stats = mgp->ss[0].fw_stats; + + if (unlikely(stats->stats_updated)) { + unsigned link_up = ntohl(stats->link_up); + if (mgp->link_state != link_up) { + mgp->link_state = link_up; + + if (mgp->link_state == MXGEFW_LINK_UP) { + netif_info(mgp, link, mgp->dev, "link up\n"); + netif_carrier_on(mgp->dev); + mgp->link_changes++; + } else { + netif_info(mgp, link, mgp->dev, "link %s\n", + (link_up == MXGEFW_LINK_MYRINET ? + "mismatch (Myrinet detected)" : + "down")); + netif_carrier_off(mgp->dev); + mgp->link_changes++; + } + } + if (mgp->rdma_tags_available != + ntohl(stats->rdma_tags_available)) { + mgp->rdma_tags_available = + ntohl(stats->rdma_tags_available); + netdev_warn(mgp->dev, "RDMA timed out! %d tags left\n", + mgp->rdma_tags_available); + } + mgp->down_cnt += stats->link_down; + if (stats->link_down) + wake_up(&mgp->down_wq); + } +} + +static int myri10ge_poll(struct napi_struct *napi, int budget) +{ + struct myri10ge_slice_state *ss = + container_of(napi, struct myri10ge_slice_state, napi); + int work_done; + +#ifdef CONFIG_MYRI10GE_DCA + if (ss->mgp->dca_enabled) + myri10ge_update_dca(ss); +#endif + /* process as many rx events as NAPI will allow */ + work_done = myri10ge_clean_rx_done(ss, budget); + + if (work_done < budget) { + napi_complete_done(napi, work_done); + put_be32(htonl(3), ss->irq_claim); + } + return work_done; +} + +static irqreturn_t myri10ge_intr(int irq, void *arg) +{ + struct myri10ge_slice_state *ss = arg; + struct myri10ge_priv *mgp = ss->mgp; + struct mcp_irq_data *stats = ss->fw_stats; + struct myri10ge_tx_buf *tx = &ss->tx; + u32 send_done_count; + int i; + + /* an interrupt on a non-zero receive-only slice is implicitly + * valid since MSI-X irqs are not shared */ + if ((mgp->dev->real_num_tx_queues == 1) && (ss != mgp->ss)) { + napi_schedule(&ss->napi); + return IRQ_HANDLED; + } + + /* make sure it is our IRQ, and that the DMA has finished */ + if (unlikely(!stats->valid)) + return IRQ_NONE; + + /* low bit indicates receives are present, so schedule + * napi poll handler */ + if (stats->valid & 1) + napi_schedule(&ss->napi); + + if (!mgp->msi_enabled && !mgp->msix_enabled) { + put_be32(0, mgp->irq_deassert); + if (!myri10ge_deassert_wait) + stats->valid = 0; + mb(); + } else + stats->valid = 0; + + /* Wait for IRQ line to go low, if using INTx */ + i = 0; + while (1) { + i++; + /* check for transmit completes and receives */ + send_done_count = ntohl(stats->send_done_count); + if (send_done_count != tx->pkt_done) + myri10ge_tx_done(ss, (int)send_done_count); + if (unlikely(i > myri10ge_max_irq_loops)) { + netdev_warn(mgp->dev, "irq stuck?\n"); + stats->valid = 0; + schedule_work(&mgp->watchdog_work); + } + if (likely(stats->valid == 0)) + break; + cpu_relax(); + barrier(); + } + + /* Only slice 0 updates stats */ + if (ss == mgp->ss) + myri10ge_check_statblock(mgp); + + put_be32(htonl(3), ss->irq_claim + 1); + return IRQ_HANDLED; +} + +static int +myri10ge_get_link_ksettings(struct net_device *netdev, + struct ethtool_link_ksettings *cmd) +{ + struct myri10ge_priv *mgp = netdev_priv(netdev); + char *ptr; + int i; + + cmd->base.autoneg = AUTONEG_DISABLE; + cmd->base.speed = SPEED_10000; + cmd->base.duplex = DUPLEX_FULL; + + /* + * parse the product code to deterimine the interface type + * (CX4, XFP, Quad Ribbon Fiber) by looking at the character + * after the 3rd dash in the driver's cached copy of the + * EEPROM's product code string. + */ + ptr = mgp->product_code_string; + if (ptr == NULL) { + netdev_err(netdev, "Missing product code\n"); + return 0; + } + for (i = 0; i < 3; i++, ptr++) { + ptr = strchr(ptr, '-'); + if (ptr == NULL) { + netdev_err(netdev, "Invalid product code %s\n", + mgp->product_code_string); + return 0; + } + } + if (*ptr == '2') + ptr++; + if (*ptr == 'R' || *ptr == 'Q' || *ptr == 'S') { + /* We've found either an XFP, quad ribbon fiber, or SFP+ */ + cmd->base.port = PORT_FIBRE; + ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE); + ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE); + } else { + cmd->base.port = PORT_OTHER; + } + + return 0; +} + +static void +myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info) +{ + struct myri10ge_priv *mgp = netdev_priv(netdev); + + 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", "irq", "MSI", "MSIX", + "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs", + "serial_number", "watchdog_resets", +#ifdef CONFIG_MYRI10GE_DCA + "dca_capable_firmware", "dca_device_present", +#endif + "link_changes", "link_up", "dropped_link_overflow", + "dropped_link_error_or_filtered", + "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32", + "dropped_unicast_filtered", "dropped_multicast_filtered", + "dropped_runt", "dropped_overrun", "dropped_no_small_buffer", + "dropped_no_big_buffer" +}; + +static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = { + "----------- slice ---------", + "tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done", + "rx_small_cnt", "rx_big_cnt", + "wake_queue", "stop_queue", "tx_linearized", +}; + +#define MYRI10GE_NET_STATS_LEN 21 +#define MYRI10GE_MAIN_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_main_stats) +#define MYRI10GE_SLICE_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_slice_stats) + +static void +myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data) +{ + struct myri10ge_priv *mgp = netdev_priv(netdev); + int i; + + switch (stringset) { + case ETH_SS_STATS: + memcpy(data, *myri10ge_gstrings_main_stats, + sizeof(myri10ge_gstrings_main_stats)); + data += sizeof(myri10ge_gstrings_main_stats); + for (i = 0; i < mgp->num_slices; i++) { + memcpy(data, *myri10ge_gstrings_slice_stats, + sizeof(myri10ge_gstrings_slice_stats)); + data += sizeof(myri10ge_gstrings_slice_stats); + } + break; + } +} + +static int myri10ge_get_sset_count(struct net_device *netdev, int sset) +{ + struct myri10ge_priv *mgp = netdev_priv(netdev); + + switch (sset) { + case ETH_SS_STATS: + return MYRI10GE_MAIN_STATS_LEN + + mgp->num_slices * MYRI10GE_SLICE_STATS_LEN; + default: + return -EOPNOTSUPP; + } +} + +static void +myri10ge_get_ethtool_stats(struct net_device *netdev, + struct ethtool_stats *stats, u64 * data) +{ + struct myri10ge_priv *mgp = netdev_priv(netdev); + struct myri10ge_slice_state *ss; + struct rtnl_link_stats64 link_stats; + int slice; + int i; + + /* force stats update */ + memset(&link_stats, 0, sizeof(link_stats)); + (void)myri10ge_get_stats(netdev, &link_stats); + for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++) + data[i] = ((u64 *)&link_stats)[i]; + + data[i++] = (unsigned int)mgp->tx_boundary; + data[i++] = (unsigned int)mgp->pdev->irq; + data[i++] = (unsigned int)mgp->msi_enabled; + data[i++] = (unsigned int)mgp->msix_enabled; + data[i++] = (unsigned int)mgp->read_dma; + data[i++] = (unsigned int)mgp->write_dma; + data[i++] = (unsigned int)mgp->read_write_dma; + data[i++] = (unsigned int)mgp->serial_number; + data[i++] = (unsigned int)mgp->watchdog_resets; +#ifdef CONFIG_MYRI10GE_DCA + data[i++] = (unsigned int)(mgp->ss[0].dca_tag != NULL); + data[i++] = (unsigned int)(mgp->dca_enabled); +#endif + data[i++] = (unsigned int)mgp->link_changes; + + /* firmware stats are useful only in the first slice */ + ss = &mgp->ss[0]; + data[i++] = (unsigned int)ntohl(ss->fw_stats->link_up); + data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_overflow); + data[i++] = + (unsigned int)ntohl(ss->fw_stats->dropped_link_error_or_filtered); + data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_pause); + data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_phy); + data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_crc32); + data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_unicast_filtered); + data[i++] = + (unsigned int)ntohl(ss->fw_stats->dropped_multicast_filtered); + data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_runt); + data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_overrun); + data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_small_buffer); + data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_big_buffer); + + for (slice = 0; slice < mgp->num_slices; slice++) { + ss = &mgp->ss[slice]; + data[i++] = slice; + data[i++] = (unsigned int)ss->tx.pkt_start; + data[i++] = (unsigned int)ss->tx.pkt_done; + data[i++] = (unsigned int)ss->tx.req; + data[i++] = (unsigned int)ss->tx.done; + data[i++] = (unsigned int)ss->rx_small.cnt; + data[i++] = (unsigned int)ss->rx_big.cnt; + data[i++] = (unsigned int)ss->tx.wake_queue; + data[i++] = (unsigned int)ss->tx.stop_queue; + data[i++] = (unsigned int)ss->tx.linearized; + } +} + +static void myri10ge_set_msglevel(struct net_device *netdev, u32 value) +{ + struct myri10ge_priv *mgp = netdev_priv(netdev); + mgp->msg_enable = value; +} + +static u32 myri10ge_get_msglevel(struct net_device *netdev) +{ + struct myri10ge_priv *mgp = netdev_priv(netdev); + return mgp->msg_enable; +} + +/* + * Use a low-level command to change the LED behavior. Rather than + * blinking (which is the normal case), when identify is used, the + * yellow LED turns solid. + */ +static int myri10ge_led(struct myri10ge_priv *mgp, int on) +{ + struct mcp_gen_header *hdr; + struct device *dev = &mgp->pdev->dev; + size_t hdr_off, pattern_off, hdr_len; + u32 pattern = 0xfffffffe; + + /* find running firmware header */ + hdr_off = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET)); + if ((hdr_off & 3) || hdr_off + sizeof(*hdr) > mgp->sram_size) { + dev_err(dev, "Running firmware has bad header offset (%d)\n", + (int)hdr_off); + return -EIO; + } + hdr_len = swab32(readl(mgp->sram + hdr_off + + offsetof(struct mcp_gen_header, header_length))); + pattern_off = hdr_off + offsetof(struct mcp_gen_header, led_pattern); + if (pattern_off >= (hdr_len + hdr_off)) { + dev_info(dev, "Firmware does not support LED identification\n"); + return -EINVAL; + } + if (!on) + pattern = swab32(readl(mgp->sram + pattern_off + 4)); + writel(swab32(pattern), mgp->sram + pattern_off); + return 0; +} + +static int +myri10ge_phys_id(struct net_device *netdev, enum ethtool_phys_id_state state) +{ + struct myri10ge_priv *mgp = netdev_priv(netdev); + int rc; + + switch (state) { + case ETHTOOL_ID_ACTIVE: + rc = myri10ge_led(mgp, 1); + break; + + case ETHTOOL_ID_INACTIVE: + rc = myri10ge_led(mgp, 0); + break; + + default: + rc = -EINVAL; + } + + return rc; +} + +static const struct ethtool_ops myri10ge_ethtool_ops = { + .get_drvinfo = myri10ge_get_drvinfo, + .get_coalesce = myri10ge_get_coalesce, + .set_coalesce = myri10ge_set_coalesce, + .get_pauseparam = myri10ge_get_pauseparam, + .set_pauseparam = myri10ge_set_pauseparam, + .get_ringparam = myri10ge_get_ringparam, + .get_link = ethtool_op_get_link, + .get_strings = myri10ge_get_strings, + .get_sset_count = myri10ge_get_sset_count, + .get_ethtool_stats = myri10ge_get_ethtool_stats, + .set_msglevel = myri10ge_set_msglevel, + .get_msglevel = myri10ge_get_msglevel, + .set_phys_id = myri10ge_phys_id, + .get_link_ksettings = myri10ge_get_link_ksettings, +}; + +static int myri10ge_allocate_rings(struct myri10ge_slice_state *ss) +{ + struct myri10ge_priv *mgp = ss->mgp; + struct myri10ge_cmd cmd; + struct net_device *dev = mgp->dev; + int tx_ring_size, rx_ring_size; + int tx_ring_entries, rx_ring_entries; + int i, slice, status; + size_t bytes; + + /* get ring sizes */ + slice = ss - mgp->ss; + cmd.data0 = slice; + status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0); + tx_ring_size = cmd.data0; + cmd.data0 = slice; + status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0); + if (status != 0) + return status; + rx_ring_size = cmd.data0; + + tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send); + rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr); + ss->tx.mask = tx_ring_entries - 1; + ss->rx_small.mask = ss->rx_big.mask = rx_ring_entries - 1; + + status = -ENOMEM; + + /* allocate the host shadow rings */ + + bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4) + * sizeof(*ss->tx.req_list); + ss->tx.req_bytes = kzalloc(bytes, GFP_KERNEL); + if (ss->tx.req_bytes == NULL) + goto abort_with_nothing; + + /* ensure req_list entries are aligned to 8 bytes */ + ss->tx.req_list = (struct mcp_kreq_ether_send *) + ALIGN((unsigned long)ss->tx.req_bytes, 8); + ss->tx.queue_active = 0; + + bytes = rx_ring_entries * sizeof(*ss->rx_small.shadow); + ss->rx_small.shadow = kzalloc(bytes, GFP_KERNEL); + if (ss->rx_small.shadow == NULL) + goto abort_with_tx_req_bytes; + + bytes = rx_ring_entries * sizeof(*ss->rx_big.shadow); + ss->rx_big.shadow = kzalloc(bytes, GFP_KERNEL); + if (ss->rx_big.shadow == NULL) + goto abort_with_rx_small_shadow; + + /* allocate the host info rings */ + + bytes = tx_ring_entries * sizeof(*ss->tx.info); + ss->tx.info = kzalloc(bytes, GFP_KERNEL); + if (ss->tx.info == NULL) + goto abort_with_rx_big_shadow; + + bytes = rx_ring_entries * sizeof(*ss->rx_small.info); + ss->rx_small.info = kzalloc(bytes, GFP_KERNEL); + if (ss->rx_small.info == NULL) + goto abort_with_tx_info; + + bytes = rx_ring_entries * sizeof(*ss->rx_big.info); + ss->rx_big.info = kzalloc(bytes, GFP_KERNEL); + if (ss->rx_big.info == NULL) + goto abort_with_rx_small_info; + + /* Fill the receive rings */ + ss->rx_big.cnt = 0; + ss->rx_small.cnt = 0; + ss->rx_big.fill_cnt = 0; + ss->rx_small.fill_cnt = 0; + ss->rx_small.page_offset = MYRI10GE_ALLOC_SIZE; + ss->rx_big.page_offset = MYRI10GE_ALLOC_SIZE; + ss->rx_small.watchdog_needed = 0; + ss->rx_big.watchdog_needed = 0; + if (mgp->small_bytes == 0) { + ss->rx_small.fill_cnt = ss->rx_small.mask + 1; + } else { + myri10ge_alloc_rx_pages(mgp, &ss->rx_small, + mgp->small_bytes + MXGEFW_PAD, 0); + } + + if (ss->rx_small.fill_cnt < ss->rx_small.mask + 1) { + netdev_err(dev, "slice-%d: alloced only %d small bufs\n", + slice, ss->rx_small.fill_cnt); + goto abort_with_rx_small_ring; + } + + myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0); + if (ss->rx_big.fill_cnt < ss->rx_big.mask + 1) { + netdev_err(dev, "slice-%d: alloced only %d big bufs\n", + slice, ss->rx_big.fill_cnt); + goto abort_with_rx_big_ring; + } + + return 0; + +abort_with_rx_big_ring: + for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) { + int idx = i & ss->rx_big.mask; + myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx], + mgp->big_bytes); + put_page(ss->rx_big.info[idx].page); + } + +abort_with_rx_small_ring: + if (mgp->small_bytes == 0) + ss->rx_small.fill_cnt = ss->rx_small.cnt; + for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) { + int idx = i & ss->rx_small.mask; + myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx], + mgp->small_bytes + MXGEFW_PAD); + put_page(ss->rx_small.info[idx].page); + } + + kfree(ss->rx_big.info); + +abort_with_rx_small_info: + kfree(ss->rx_small.info); + +abort_with_tx_info: + kfree(ss->tx.info); + +abort_with_rx_big_shadow: + kfree(ss->rx_big.shadow); + +abort_with_rx_small_shadow: + kfree(ss->rx_small.shadow); + +abort_with_tx_req_bytes: + kfree(ss->tx.req_bytes); + ss->tx.req_bytes = NULL; + ss->tx.req_list = NULL; + +abort_with_nothing: + return status; +} + +static void myri10ge_free_rings(struct myri10ge_slice_state *ss) +{ + struct myri10ge_priv *mgp = ss->mgp; + struct sk_buff *skb; + struct myri10ge_tx_buf *tx; + int i, len, idx; + + /* If not allocated, skip it */ + if (ss->tx.req_list == NULL) + return; + + for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) { + idx = i & ss->rx_big.mask; + if (i == ss->rx_big.fill_cnt - 1) + ss->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE; + myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx], + mgp->big_bytes); + put_page(ss->rx_big.info[idx].page); + } + + if (mgp->small_bytes == 0) + ss->rx_small.fill_cnt = ss->rx_small.cnt; + for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) { + idx = i & ss->rx_small.mask; + if (i == ss->rx_small.fill_cnt - 1) + ss->rx_small.info[idx].page_offset = + MYRI10GE_ALLOC_SIZE; + myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx], + mgp->small_bytes + MXGEFW_PAD); + put_page(ss->rx_small.info[idx].page); + } + tx = &ss->tx; + while (tx->done != tx->req) { + idx = tx->done & tx->mask; + skb = tx->info[idx].skb; + + /* Mark as free */ + tx->info[idx].skb = NULL; + tx->done++; + len = dma_unmap_len(&tx->info[idx], len); + dma_unmap_len_set(&tx->info[idx], len, 0); + if (skb) { + ss->stats.tx_dropped++; + dev_kfree_skb_any(skb); + if (len) + 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_range(pdev, mgp->msix_vectors, + mgp->num_slices, mgp->num_slices); + if (status < 0) { + dev_err(&pdev->dev, + "Error %d setting up MSI-X\n", status); + return status; + } + mgp->msix_enabled = 1; + } + if (mgp->msix_enabled == 0) { + status = pci_enable_msi(pdev); + if (status != 0) { + dev_err(&pdev->dev, + "Error %d setting up MSI; falling back to xPIC\n", + status); + } else { + mgp->msi_enabled = 1; + } + } + } + if (mgp->msix_enabled) { + for (i = 0; i < mgp->num_slices; i++) { + ss = &mgp->ss[i]; + snprintf(ss->irq_desc, sizeof(ss->irq_desc), + "%s:slice-%d", netdev->name, i); + status = request_irq(mgp->msix_vectors[i].vector, + myri10ge_intr, 0, ss->irq_desc, + ss); + if (status != 0) { + dev_err(&pdev->dev, + "slice %d failed to allocate IRQ\n", i); + i--; + while (i >= 0) { + free_irq(mgp->msix_vectors[i].vector, + &mgp->ss[i]); + i--; + } + pci_disable_msix(pdev); + return status; + } + } + } else { + status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED, + mgp->dev->name, &mgp->ss[0]); + if (status != 0) { + dev_err(&pdev->dev, "failed to allocate IRQ\n"); + if (mgp->msi_enabled) + pci_disable_msi(pdev); + } + } + return status; +} + +static void myri10ge_free_irq(struct myri10ge_priv *mgp) +{ + struct pci_dev *pdev = mgp->pdev; + int i; + + if (mgp->msix_enabled) { + for (i = 0; i < mgp->num_slices; i++) + free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]); + } else { + free_irq(pdev->irq, &mgp->ss[0]); + } + if (mgp->msi_enabled) + pci_disable_msi(pdev); + if (mgp->msix_enabled) + pci_disable_msix(pdev); +} + +static int myri10ge_get_txrx(struct myri10ge_priv *mgp, int slice) +{ + struct myri10ge_cmd cmd; + struct myri10ge_slice_state *ss; + int status; + + ss = &mgp->ss[slice]; + status = 0; + if (slice == 0 || (mgp->dev->real_num_tx_queues > 1)) { + cmd.data0 = slice; + status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET, + &cmd, 0); + ss->tx.lanai = (struct mcp_kreq_ether_send __iomem *) + (mgp->sram + cmd.data0); + } + cmd.data0 = slice; + status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET, + &cmd, 0); + ss->rx_small.lanai = (struct mcp_kreq_ether_recv __iomem *) + (mgp->sram + cmd.data0); + + cmd.data0 = slice; + status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0); + ss->rx_big.lanai = (struct mcp_kreq_ether_recv __iomem *) + (mgp->sram + cmd.data0); + + ss->tx.send_go = (__iomem __be32 *) + (mgp->sram + MXGEFW_ETH_SEND_GO + 64 * slice); + ss->tx.send_stop = (__iomem __be32 *) + (mgp->sram + MXGEFW_ETH_SEND_STOP + 64 * slice); + return status; + +} + +static int myri10ge_set_stats(struct myri10ge_priv *mgp, int slice) +{ + struct myri10ge_cmd cmd; + struct myri10ge_slice_state *ss; + int status; + + ss = &mgp->ss[slice]; + cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->fw_stats_bus); + cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->fw_stats_bus); + cmd.data2 = sizeof(struct mcp_irq_data) | (slice << 16); + status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0); + if (status == -ENOSYS) { + dma_addr_t bus = ss->fw_stats_bus; + if (slice != 0) + return -EINVAL; + bus += offsetof(struct mcp_irq_data, send_done_count); + cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus); + cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus); + status = myri10ge_send_cmd(mgp, + MXGEFW_CMD_SET_STATS_DMA_OBSOLETE, + &cmd, 0); + /* Firmware cannot support multicast without STATS_DMA_V2 */ + mgp->fw_multicast_support = 0; + } else { + mgp->fw_multicast_support = 1; + } + return 0; +} + +static int myri10ge_open(struct net_device *dev) +{ + struct myri10ge_slice_state *ss; + struct myri10ge_priv *mgp = netdev_priv(dev); + struct myri10ge_cmd cmd; + int i, status, big_pow2, slice; + u8 __iomem *itable; + + if (mgp->running != MYRI10GE_ETH_STOPPED) + return -EBUSY; + + mgp->running = MYRI10GE_ETH_STARTING; + status = myri10ge_reset(mgp); + if (status != 0) { + netdev_err(dev, "failed reset\n"); + goto abort_with_nothing; + } + + if (mgp->num_slices > 1) { + cmd.data0 = mgp->num_slices; + cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE; + if (mgp->dev->real_num_tx_queues > 1) + cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES; + status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES, + &cmd, 0); + if (status != 0) { + netdev_err(dev, "failed to set number of slices\n"); + goto abort_with_nothing; + } + /* setup the indirection table */ + cmd.data0 = mgp->num_slices; + status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_TABLE_SIZE, + &cmd, 0); + + status |= myri10ge_send_cmd(mgp, + MXGEFW_CMD_GET_RSS_TABLE_OFFSET, + &cmd, 0); + if (status != 0) { + netdev_err(dev, "failed to setup rss tables\n"); + goto abort_with_nothing; + } + + /* just enable an identity mapping */ + itable = mgp->sram + cmd.data0; + for (i = 0; i < mgp->num_slices; i++) + __raw_writeb(i, &itable[i]); + + cmd.data0 = 1; + cmd.data1 = myri10ge_rss_hash; + status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_ENABLE, + &cmd, 0); + if (status != 0) { + netdev_err(dev, "failed to enable slices\n"); + goto abort_with_nothing; + } + } + + status = myri10ge_request_irq(mgp); + if (status != 0) + goto abort_with_nothing; + + /* decide what small buffer size to use. For good TCP rx + * performance, it is important to not receive 1514 byte + * frames into jumbo buffers, as it confuses the socket buffer + * accounting code, leading to drops and erratic performance. + */ + + if (dev->mtu <= ETH_DATA_LEN) + /* enough for a TCP header */ + mgp->small_bytes = (128 > SMP_CACHE_BYTES) + ? (128 - MXGEFW_PAD) + : (SMP_CACHE_BYTES - MXGEFW_PAD); + else + /* enough for a vlan encapsulated ETH_DATA_LEN frame */ + mgp->small_bytes = VLAN_ETH_FRAME_LEN; + + /* Override the small buffer size? */ + if (myri10ge_small_bytes >= 0) + mgp->small_bytes = myri10ge_small_bytes; + + /* Firmware needs the big buff size as a power of 2. Lie and + * tell him the buffer is larger, because we only use 1 + * buffer/pkt, and the mtu will prevent overruns. + */ + big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD; + if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) { + while (!is_power_of_2(big_pow2)) + big_pow2++; + mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD; + } else { + big_pow2 = MYRI10GE_ALLOC_SIZE; + mgp->big_bytes = big_pow2; + } + + /* setup the per-slice data structures */ + for (slice = 0; slice < mgp->num_slices; slice++) { + ss = &mgp->ss[slice]; + + status = myri10ge_get_txrx(mgp, slice); + if (status != 0) { + netdev_err(dev, "failed to get ring sizes or locations\n"); + goto abort_with_rings; + } + status = myri10ge_allocate_rings(ss); + if (status != 0) + goto abort_with_rings; + + /* only firmware which supports multiple TX queues + * supports setting up the tx stats on non-zero + * slices */ + if (slice == 0 || mgp->dev->real_num_tx_queues > 1) + status = myri10ge_set_stats(mgp, slice); + if (status) { + netdev_err(dev, "Couldn't set stats DMA\n"); + goto abort_with_rings; + } + + /* must happen prior to any irq */ + napi_enable(&(ss)->napi); + } + + /* now give firmware buffers sizes, and MTU */ + cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN; + status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0); + cmd.data0 = mgp->small_bytes; + status |= + myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0); + cmd.data0 = big_pow2; + status |= + myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0); + if (status) { + netdev_err(dev, "Couldn't set buffer sizes\n"); + goto abort_with_rings; + } + + /* + * Set Linux style TSO mode; this is needed only on newer + * firmware versions. Older versions default to Linux + * style TSO + */ + cmd.data0 = 0; + status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_TSO_MODE, &cmd, 0); + if (status && status != -ENOSYS) { + netdev_err(dev, "Couldn't set TSO mode\n"); + goto abort_with_rings; + } + + mgp->link_state = ~0U; + mgp->rdma_tags_available = 15; + + status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0); + if (status) { + netdev_err(dev, "Couldn't bring up link\n"); + goto abort_with_rings; + } + + mgp->running = MYRI10GE_ETH_RUNNING; + mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ; + add_timer(&mgp->watchdog_timer); + netif_tx_wake_all_queues(dev); + + return 0; + +abort_with_rings: + while (slice) { + slice--; + napi_disable(&mgp->ss[slice].napi); + } + for (i = 0; i < mgp->num_slices; i++) + myri10ge_free_rings(&mgp->ss[i]); + + myri10ge_free_irq(mgp); + +abort_with_nothing: + mgp->running = MYRI10GE_ETH_STOPPED; + return -ENOMEM; +} + +static int myri10ge_close(struct net_device *dev) +{ + struct myri10ge_priv *mgp = netdev_priv(dev); + struct myri10ge_cmd cmd; + int status, old_down_cnt; + int i; + + if (mgp->running != MYRI10GE_ETH_RUNNING) + return 0; + + if (mgp->ss[0].tx.req_bytes == NULL) + return 0; + + del_timer_sync(&mgp->watchdog_timer); + mgp->running = MYRI10GE_ETH_STOPPING; + for (i = 0; i < mgp->num_slices; i++) + napi_disable(&mgp->ss[i].napi); + + netif_carrier_off(dev); + + netif_tx_stop_all_queues(dev); + if (mgp->rebooted == 0) { + old_down_cnt = mgp->down_cnt; + mb(); + status = + myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0); + if (status) + netdev_err(dev, "Couldn't bring down link\n"); + + wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt, + HZ); + if (old_down_cnt == mgp->down_cnt) + netdev_err(dev, "never got down irq\n"); + } + netif_tx_disable(dev); + myri10ge_free_irq(mgp); + for (i = 0; i < mgp->num_slices; i++) + myri10ge_free_rings(&mgp->ss[i]); + + mgp->running = MYRI10GE_ETH_STOPPED; + return 0; +} + +/* copy an array of struct mcp_kreq_ether_send's to the mcp. Copy + * backwards one at a time and handle ring wraps */ + +static inline void +myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx, + struct mcp_kreq_ether_send *src, int cnt) +{ + int idx, starting_slot; + starting_slot = tx->req; + while (cnt > 1) { + cnt--; + idx = (starting_slot + cnt) & tx->mask; + myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src)); + mb(); + } +} + +/* + * copy an array of struct mcp_kreq_ether_send's to the mcp. Copy + * at most 32 bytes at a time, so as to avoid involving the software + * pio handler in the nic. We re-write the first segment's flags + * to mark them valid only after writing the entire chain. + */ + +static inline void +myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src, + int cnt) +{ + int idx, i; + struct mcp_kreq_ether_send __iomem *dstp, *dst; + struct mcp_kreq_ether_send *srcp; + u8 last_flags; + + idx = tx->req & tx->mask; + + last_flags = src->flags; + src->flags = 0; + mb(); + dst = dstp = &tx->lanai[idx]; + srcp = src; + + if ((idx + cnt) < tx->mask) { + for (i = 0; i < (cnt - 1); i += 2) { + myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src)); + mb(); /* force write every 32 bytes */ + srcp += 2; + dstp += 2; + } + } else { + /* submit all but the first request, and ensure + * that it is submitted below */ + myri10ge_submit_req_backwards(tx, src, cnt); + i = 0; + } + if (i < cnt) { + /* submit the first request */ + myri10ge_pio_copy(dstp, srcp, sizeof(*src)); + mb(); /* barrier before setting valid flag */ + } + + /* re-write the last 32-bits with the valid flags */ + src->flags = last_flags; + put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3); + tx->req += cnt; + mb(); +} + +static void myri10ge_unmap_tx_dma(struct myri10ge_priv *mgp, + struct myri10ge_tx_buf *tx, int idx) +{ + unsigned int len; + int last_idx; + + /* Free any DMA resources we've alloced and clear out the skb slot */ + last_idx = (idx + 1) & tx->mask; + idx = tx->req & tx->mask; + do { + len = dma_unmap_len(&tx->info[idx], len); + if (len) { + if (tx->info[idx].skb != NULL) + 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); +} + +/* + * 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, 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 (eth_skb_pad(skb)) { + /* The packet is gone, so we must + * return 0 */ + ss->stats.tx_dropped += 1; + return NETDEV_TX_OK; + } + } + + /* map the skb for DMA */ + len = skb_headlen(skb); + bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE); + if (unlikely(pci_dma_mapping_error(mgp->pdev, bus))) + goto drop; + + idx = tx->req & tx->mask; + tx->info[idx].skb = skb; + dma_unmap_addr_set(&tx->info[idx], bus, bus); + dma_unmap_len_set(&tx->info[idx], len, len); + + frag_cnt = skb_shinfo(skb)->nr_frags; + frag_idx = 0; + count = 0; + rdma_count = 0; + + /* "rdma_count" is the number of RDMAs belonging to the + * current packet BEFORE the current send request. For + * non-TSO packets, this is equal to "count". + * For TSO packets, rdma_count needs to be reset + * to 0 after a segment cut. + * + * The rdma_count field of the send request is + * the number of RDMAs of the packet starting at + * that request. For TSO send requests with one ore more cuts + * in the middle, this is the number of RDMAs starting + * after the last cut in the request. All previous + * segments before the last cut implicitly have 1 RDMA. + * + * Since the number of RDMAs is not known beforehand, + * it must be filled-in retroactively - after each + * segmentation cut or at the end of the entire packet. + */ + + while (1) { + /* Break the SKB or Fragment up into pieces which + * do not cross mgp->tx_boundary */ + low = MYRI10GE_LOWPART_TO_U32(bus); + high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus)); + while (len) { + u8 flags_next; + int cum_len_next; + + if (unlikely(count == max_segments)) + goto abort_linearize; + + boundary = + (low + mgp->tx_boundary) & ~(mgp->tx_boundary - 1); + seglen = boundary - low; + if (seglen > len) + seglen = len; + flags_next = flags & ~MXGEFW_FLAGS_FIRST; + cum_len_next = cum_len + seglen; + if (mss) { /* TSO */ + (req - rdma_count)->rdma_count = rdma_count + 1; + + if (likely(cum_len >= 0)) { /* payload */ + int next_is_first, chop; + + chop = (cum_len_next > mss); + cum_len_next = cum_len_next % mss; + next_is_first = (cum_len_next == 0); + flags |= chop * MXGEFW_FLAGS_TSO_CHOP; + flags_next |= next_is_first * + MXGEFW_FLAGS_FIRST; + rdma_count |= -(chop | next_is_first); + rdma_count += chop & ~next_is_first; + } else if (likely(cum_len_next >= 0)) { /* header ends */ + int small; + + rdma_count = -1; + cum_len_next = 0; + seglen = -cum_len; + small = (mss <= MXGEFW_SEND_SMALL_SIZE); + flags_next = MXGEFW_FLAGS_TSO_PLD | + MXGEFW_FLAGS_FIRST | + (small * MXGEFW_FLAGS_SMALL); + } + } + req->addr_high = high_swapped; + req->addr_low = htonl(low); + req->pseudo_hdr_offset = htons(pseudo_hdr_offset); + req->pad = 0; /* complete solid 16-byte block; does this matter? */ + req->rdma_count = 1; + req->length = htons(seglen); + req->cksum_offset = cksum_offset; + req->flags = flags | ((cum_len & 1) * odd_flag); + + low += seglen; + len -= seglen; + cum_len = cum_len_next; + flags = flags_next; + req++; + count++; + rdma_count++; + if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) { + if (unlikely(cksum_offset > seglen)) + cksum_offset -= seglen; + else + cksum_offset = 0; + } + } + if (frag_idx == frag_cnt) + break; + + /* map next fragment for DMA */ + frag = &skb_shinfo(skb)->frags[frag_idx]; + frag_idx++; + len = skb_frag_size(frag); + bus = skb_frag_dma_map(&mgp->pdev->dev, frag, 0, len, + DMA_TO_DEVICE); + if (unlikely(pci_dma_mapping_error(mgp->pdev, bus))) { + myri10ge_unmap_tx_dma(mgp, tx, idx); + goto drop; + } + idx = (count + tx->req) & tx->mask; + dma_unmap_addr_set(&tx->info[idx], bus, bus); + dma_unmap_len_set(&tx->info[idx], len, len); + } + + (req - rdma_count)->rdma_count = rdma_count; + if (mss) + do { + req--; + req->flags |= MXGEFW_FLAGS_TSO_LAST; + } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP | + MXGEFW_FLAGS_FIRST))); + idx = ((count - 1) + tx->req) & tx->mask; + tx->info[idx].last = 1; + myri10ge_submit_req(tx, tx->req_list, count); + /* if using multiple tx queues, make sure NIC polls the + * current slice */ + if ((mgp->dev->real_num_tx_queues > 1) && tx->queue_active == 0) { + tx->queue_active = 1; + put_be32(htonl(1), tx->send_go); + mb(); + 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: + myri10ge_unmap_tx_dma(mgp, tx, idx); + + if (skb_is_gso(skb)) { + netdev_err(mgp->dev, "TSO but wanted to linearize?!?!?\n"); + goto drop; + } + + if (skb_linearize(skb)) + goto drop; + + tx->linearized++; + goto again; + +drop: + dev_kfree_skb_any(skb); + ss->stats.tx_dropped += 1; + return NETDEV_TX_OK; + +} + +static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb, + struct net_device *dev) +{ + struct sk_buff *segs, *curr; + 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 void myri10ge_get_stats(struct net_device *dev, + struct rtnl_link_stats64 *stats) +{ + const struct myri10ge_priv *mgp = netdev_priv(dev); + const struct myri10ge_slice_netstats *slice_stats; + int i; + + for (i = 0; i < mgp->num_slices; i++) { + slice_stats = &mgp->ss[i].stats; + stats->rx_packets += slice_stats->rx_packets; + stats->tx_packets += slice_stats->tx_packets; + stats->rx_bytes += slice_stats->rx_bytes; + stats->tx_bytes += slice_stats->tx_bytes; + stats->rx_dropped += slice_stats->rx_dropped; + stats->tx_dropped += slice_stats->tx_dropped; + } +} + +static void myri10ge_set_multicast_list(struct net_device *dev) +{ + struct myri10ge_priv *mgp = netdev_priv(dev); + struct myri10ge_cmd cmd; + struct netdev_hw_addr *ha; + __be32 data[2] = { 0, 0 }; + int err; + + /* can be called from atomic contexts, + * pass 1 to force atomicity in myri10ge_send_cmd() */ + myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1); + + /* This firmware is known to not support multicast */ + if (!mgp->fw_multicast_support) + return; + + /* Disable multicast filtering */ + + err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1); + if (err != 0) { + netdev_err(dev, "Failed MXGEFW_ENABLE_ALLMULTI, error status: %d\n", + err); + goto abort; + } + + if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) { + /* request to disable multicast filtering, so quit here */ + return; + } + + /* Flush the filters */ + + err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS, + &cmd, 1); + if (err != 0) { + netdev_err(dev, "Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS, error status: %d\n", + err); + goto abort; + } + + /* Walk the multicast list, and add each address */ + netdev_for_each_mc_addr(ha, dev) { + memcpy(data, &ha->addr, ETH_ALEN); + cmd.data0 = ntohl(data[0]); + cmd.data1 = ntohl(data[1]); + err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP, + &cmd, 1); + + if (err != 0) { + netdev_err(dev, "Failed MXGEFW_JOIN_MULTICAST_GROUP, error status:%d %pM\n", + err, ha->addr); + goto abort; + } + } + /* Enable multicast filtering */ + err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1); + if (err != 0) { + netdev_err(dev, "Failed MXGEFW_DISABLE_ALLMULTI, error status: %d\n", + err); + goto abort; + } + + return; + +abort: + return; +} + +static int myri10ge_set_mac_address(struct net_device *dev, void *addr) +{ + struct sockaddr *sa = addr; + struct myri10ge_priv *mgp = netdev_priv(dev); + int status; + + if (!is_valid_ether_addr(sa->sa_data)) + return -EADDRNOTAVAIL; + + status = myri10ge_update_mac_address(mgp, sa->sa_data); + if (status != 0) { + netdev_err(dev, "changing mac address failed with %d\n", + status); + return status; + } + + /* change the dev structure */ + memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN); + return 0; +} + +static int myri10ge_change_mtu(struct net_device *dev, int new_mtu) +{ + struct myri10ge_priv *mgp = netdev_priv(dev); + int error = 0; + + 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; + int cap; + unsigned err_cap; + int ret; + + if (!myri10ge_ecrc_enable || !bridge) + return; + + /* check that the bridge is a root port */ + if (pci_pcie_type(bridge) != PCI_EXP_TYPE_ROOT_PORT) { + if (myri10ge_ecrc_enable > 1) { + struct pci_dev *prev_bridge, *old_bridge = bridge; + + /* Walk the hierarchy up to the root port + * where ECRC has to be enabled */ + do { + prev_bridge = bridge; + bridge = bridge->bus->self; + if (!bridge || prev_bridge == bridge) { + dev_err(dev, + "Failed to find root port" + " to force ECRC\n"); + return; + } + } while (pci_pcie_type(bridge) != + PCI_EXP_TYPE_ROOT_PORT); + + dev_info(dev, + "Forcing ECRC on non-root port %s" + " (enabling on root port %s)\n", + pci_name(old_bridge), pci_name(bridge)); + } else { + dev_err(dev, + "Not enabling ECRC on non-root port %s\n", + pci_name(bridge)); + return; + } + } + + cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR); + if (!cap) + return; + + ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap); + if (ret) { + dev_err(dev, "failed reading ext-conf-space of %s\n", + pci_name(bridge)); + dev_err(dev, "\t pci=nommconf in use? " + "or buggy/incomplete/absent ACPI MCFG attr?\n"); + return; + } + if (!(err_cap & PCI_ERR_CAP_ECRC_GENC)) + return; + + err_cap |= PCI_ERR_CAP_ECRC_GENE; + pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap); + dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge)); +} + +/* + * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput + * when the PCI-E Completion packets are aligned on an 8-byte + * boundary. Some PCI-E chip sets always align Completion packets; on + * the ones that do not, the alignment can be enforced by enabling + * ECRC generation (if supported). + * + * When PCI-E Completion packets are not aligned, it is actually more + * efficient to limit Read-DMA transactions to 2KB, rather than 4KB. + * + * If the driver can neither enable ECRC nor verify that it has + * already been enabled, then it must use a firmware image which works + * around unaligned completion packets (myri10ge_rss_ethp_z8e.dat), and it + * should also ensure that it never gives the device a Read-DMA which is + * larger than 2KB by setting the tx_boundary to 2KB. If ECRC is + * enabled, then the driver should use the aligned (myri10ge_rss_eth_z8e.dat) + * firmware image, and set tx_boundary to 4KB. + */ + +static void myri10ge_firmware_probe(struct myri10ge_priv *mgp) +{ + struct pci_dev *pdev = mgp->pdev; + struct device *dev = &pdev->dev; + int status; + + mgp->tx_boundary = 4096; + /* + * Verify the max read request size was set to 4KB + * before trying the test with 4KB. + */ + status = pcie_get_readrq(pdev); + if (status < 0) { + dev_err(dev, "Couldn't read max read req size: %d\n", status); + goto abort; + } + if (status != 4096) { + dev_warn(dev, "Max Read Request size != 4096 (%d)\n", status); + mgp->tx_boundary = 2048; + } + /* + * load the optimized firmware (which assumes aligned PCIe + * completions) in order to see if it works on this host. + */ + set_fw_name(mgp, myri10ge_fw_aligned, false); + status = myri10ge_load_firmware(mgp, 1); + if (status != 0) { + goto abort; + } + + /* + * Enable ECRC if possible + */ + myri10ge_enable_ecrc(mgp); + + /* + * Run a DMA test which watches for unaligned completions and + * aborts on the first one seen. + */ + + status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST); + if (status == 0) + return; /* keep the aligned firmware */ + + if (status != -E2BIG) + dev_warn(dev, "DMA test failed: %d\n", status); + if (status == -ENOSYS) + dev_warn(dev, "Falling back to ethp! " + "Please install up to date fw\n"); +abort: + /* fall back to using the unaligned firmware */ + mgp->tx_boundary = 2048; + set_fw_name(mgp, myri10ge_fw_unaligned, false); +} + +static void myri10ge_select_firmware(struct myri10ge_priv *mgp) +{ + int overridden = 0; + + if (myri10ge_force_firmware == 0) { + int link_width; + u16 lnk; + + pcie_capability_read_word(mgp->pdev, PCI_EXP_LNKSTA, &lnk); + link_width = (lnk >> 4) & 0x3f; + + /* Check to see if Link is less than 8 or if the + * upstream bridge is known to provide aligned + * completions */ + if (link_width < 8) { + dev_info(&mgp->pdev->dev, "PCIE x%d Link\n", + link_width); + mgp->tx_boundary = 4096; + set_fw_name(mgp, myri10ge_fw_aligned, false); + } else { + myri10ge_firmware_probe(mgp); + } + } else { + if (myri10ge_force_firmware == 1) { + dev_info(&mgp->pdev->dev, + "Assuming aligned completions (forced)\n"); + mgp->tx_boundary = 4096; + set_fw_name(mgp, myri10ge_fw_aligned, false); + } else { + dev_info(&mgp->pdev->dev, + "Assuming unaligned completions (forced)\n"); + mgp->tx_boundary = 2048; + set_fw_name(mgp, myri10ge_fw_unaligned, false); + } + } + + kernel_param_lock(THIS_MODULE); + if (myri10ge_fw_name != NULL) { + char *fw_name = kstrdup(myri10ge_fw_name, GFP_KERNEL); + if (fw_name) { + overridden = 1; + set_fw_name(mgp, fw_name, true); + } + } + kernel_param_unlock(THIS_MODULE); + + if (mgp->board_number < MYRI10GE_MAX_BOARDS && + myri10ge_fw_names[mgp->board_number] != NULL && + strlen(myri10ge_fw_names[mgp->board_number])) { + set_fw_name(mgp, myri10ge_fw_names[mgp->board_number], false); + overridden = 1; + } + if (overridden) + dev_info(&mgp->pdev->dev, "overriding firmware to %s\n", + mgp->fw_name); +} + +static void myri10ge_mask_surprise_down(struct pci_dev *pdev) +{ + struct pci_dev *bridge = pdev->bus->self; + int cap; + u32 mask; + + if (bridge == NULL) + return; + + cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR); + if (cap) { + /* a sram parity error can cause a surprise link + * down; since we expect and can recover from sram + * parity errors, mask surprise link down events */ + pci_read_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, &mask); + mask |= 0x20; + pci_write_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, mask); + } +} + +#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, PCI_D0); /* 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; +} + +static void +myri10ge_check_slice(struct myri10ge_slice_state *ss, int *reset_needed, + int *busy_slice_cnt, u32 rx_pause_cnt) +{ + struct myri10ge_priv *mgp = ss->mgp; + int slice = ss - mgp->ss; + + if (ss->tx.req != ss->tx.done && + ss->tx.done == ss->watchdog_tx_done && + ss->watchdog_tx_req != ss->watchdog_tx_done) { + /* nic seems like it might be stuck.. */ + if (rx_pause_cnt != mgp->watchdog_pause) { + if (net_ratelimit()) + netdev_warn(mgp->dev, "slice %d: TX paused, " + "check link partner\n", slice); + } else { + netdev_warn(mgp->dev, + "slice %d: TX stuck %d %d %d %d %d %d\n", + slice, ss->tx.queue_active, ss->tx.req, + ss->tx.done, ss->tx.pkt_start, + ss->tx.pkt_done, + (int)ntohl(mgp->ss[slice].fw_stats-> + send_done_count)); + *reset_needed = 1; + ss->stuck = 1; + } + } + if (ss->watchdog_tx_done != ss->tx.done || + ss->watchdog_rx_done != ss->rx_done.cnt) { + *busy_slice_cnt += 1; + } + ss->watchdog_tx_done = ss->tx.done; + ss->watchdog_tx_req = ss->tx.req; + ss->watchdog_rx_done = ss->rx_done.cnt; +} + +/* + * This watchdog is used to check whether the board has suffered + * from a parity error and needs to be recovered. + */ +static void myri10ge_watchdog(struct work_struct *work) +{ + struct myri10ge_priv *mgp = + container_of(work, struct myri10ge_priv, watchdog_work); + struct myri10ge_slice_state *ss; + u32 reboot, rx_pause_cnt; + int status, rebooted; + int i; + int reset_needed = 0; + int busy_slice_cnt = 0; + u16 cmd, vendor; + + mgp->watchdog_resets++; + pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd); + rebooted = 0; + if ((cmd & PCI_COMMAND_MASTER) == 0) { + /* Bus master DMA disabled? Check to see + * if the card rebooted due to a parity error + * For now, just report it */ + reboot = myri10ge_read_reboot(mgp); + netdev_err(mgp->dev, "NIC rebooted (0x%x),%s resetting\n", + reboot, myri10ge_reset_recover ? "" : " not"); + if (myri10ge_reset_recover == 0) + return; + rtnl_lock(); + mgp->rebooted = 1; + rebooted = 1; + myri10ge_close(mgp->dev); + myri10ge_reset_recover--; + mgp->rebooted = 0; + /* + * A rebooted nic will come back with config space as + * it was after power was applied to PCIe bus. + * Attempt to restore config space which was saved + * when the driver was loaded, or the last time the + * nic was resumed from power saving mode. + */ + pci_restore_state(mgp->pdev); + + /* save state again for accounting reasons */ + pci_save_state(mgp->pdev); + + } else { + /* if we get back -1's from our slot, perhaps somebody + * powered off our card. Don't try to reset it in + * this case */ + if (cmd == 0xffff) { + pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor); + if (vendor == 0xffff) { + netdev_err(mgp->dev, "device disappeared!\n"); + return; + } + } + /* Perhaps it is a software error. See if stuck slice + * has recovered, reset if not */ + rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause); + for (i = 0; i < mgp->num_slices; i++) { + ss = mgp->ss; + if (ss->stuck) { + myri10ge_check_slice(ss, &reset_needed, + &busy_slice_cnt, + rx_pause_cnt); + ss->stuck = 0; + } + } + if (!reset_needed) { + netdev_dbg(mgp->dev, "not resetting\n"); + return; + } + + netdev_err(mgp->dev, "device timeout, resetting\n"); + } + + if (!rebooted) { + rtnl_lock(); + myri10ge_close(mgp->dev); + } + status = myri10ge_load_firmware(mgp, 1); + if (status != 0) + netdev_err(mgp->dev, "failed to load firmware\n"); + else + myri10ge_open(mgp->dev); + rtnl_unlock(); +} + +/* + * We use our own timer routine rather than relying upon + * netdev->tx_timeout because we have a very large hardware transmit + * queue. Due to the large queue, the netdev->tx_timeout function + * cannot detect a NIC with a parity error in a timely fashion if the + * NIC is lightly loaded. + */ +static void myri10ge_watchdog_timer(struct timer_list *t) +{ + struct myri10ge_priv *mgp; + struct myri10ge_slice_state *ss; + int i, reset_needed, busy_slice_cnt; + u32 rx_pause_cnt; + u16 cmd; + + mgp = from_timer(mgp, t, watchdog_timer); + + rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause); + busy_slice_cnt = 0; + for (i = 0, reset_needed = 0; + i < mgp->num_slices && reset_needed == 0; ++i) { + + ss = &mgp->ss[i]; + if (ss->rx_small.watchdog_needed) { + myri10ge_alloc_rx_pages(mgp, &ss->rx_small, + mgp->small_bytes + MXGEFW_PAD, + 1); + if (ss->rx_small.fill_cnt - ss->rx_small.cnt >= + myri10ge_fill_thresh) + ss->rx_small.watchdog_needed = 0; + } + if (ss->rx_big.watchdog_needed) { + myri10ge_alloc_rx_pages(mgp, &ss->rx_big, + mgp->big_bytes, 1); + if (ss->rx_big.fill_cnt - ss->rx_big.cnt >= + myri10ge_fill_thresh) + ss->rx_big.watchdog_needed = 0; + } + myri10ge_check_slice(ss, &reset_needed, &busy_slice_cnt, + rx_pause_cnt); + } + /* if we've sent or received no traffic, poll the NIC to + * ensure it is still there. Otherwise, we risk not noticing + * an error in a timely fashion */ + if (busy_slice_cnt == 0) { + pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd); + if ((cmd & PCI_COMMAND_MASTER) == 0) { + reset_needed = 1; + } + } + mgp->watchdog_pause = rx_pause_cnt; + + if (reset_needed) { + schedule_work(&mgp->watchdog_work); + } else { + /* rearm timer */ + mod_timer(&mgp->watchdog_timer, + jiffies + myri10ge_watchdog_timeout * HZ); + } +} + +static void myri10ge_free_slices(struct myri10ge_priv *mgp) +{ + struct myri10ge_slice_state *ss; + struct pci_dev *pdev = mgp->pdev; + size_t bytes; + int i; + + if (mgp->ss == NULL) + return; + + for (i = 0; i < mgp->num_slices; i++) { + ss = &mgp->ss[i]; + if (ss->rx_done.entry != NULL) { + bytes = mgp->max_intr_slots * + sizeof(*ss->rx_done.entry); + dma_free_coherent(&pdev->dev, bytes, + ss->rx_done.entry, ss->rx_done.bus); + ss->rx_done.entry = NULL; + } + if (ss->fw_stats != NULL) { + bytes = sizeof(*ss->fw_stats); + dma_free_coherent(&pdev->dev, bytes, + ss->fw_stats, ss->fw_stats_bus); + ss->fw_stats = NULL; + } + napi_hash_del(&ss->napi); + netif_napi_del(&ss->napi); + } + /* Wait till napi structs are no longer used, and then free ss. */ + synchronize_rcu(); + 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_zalloc_coherent(&pdev->dev, bytes, + &ss->rx_done.bus, + GFP_KERNEL); + if (ss->rx_done.entry == NULL) + goto abort; + bytes = sizeof(*ss->fw_stats); + ss->fw_stats = dma_alloc_coherent(&pdev->dev, bytes, + &ss->fw_stats_bus, + GFP_KERNEL); + if (ss->fw_stats == NULL) + goto abort; + ss->mgp = mgp; + ss->dev = mgp->dev; + netif_napi_add(ss->dev, &ss->napi, myri10ge_poll, + myri10ge_napi_weight); + } + return 0; +abort: + myri10ge_free_slices(mgp); + return -ENOMEM; +} + +/* + * This function determines the number of slices supported. + * The number slices is the minimum of the number of CPUS, + * the number of MSI-X irqs supported, the number of slices + * supported by the firmware + */ +static void myri10ge_probe_slices(struct myri10ge_priv *mgp) +{ + struct myri10ge_cmd cmd; + struct pci_dev *pdev = mgp->pdev; + char *old_fw; + bool old_allocated; + int i, status, ncpus; + + mgp->num_slices = 1; + ncpus = netif_get_num_default_rss_queues(); + + if (myri10ge_max_slices == 1 || !pdev->msix_cap || + (myri10ge_max_slices == -1 && ncpus < 2)) + return; + + /* try to load the slice aware rss firmware */ + old_fw = mgp->fw_name; + old_allocated = mgp->fw_name_allocated; + /* don't free old_fw if we override it. */ + mgp->fw_name_allocated = false; + + if (myri10ge_fw_name != NULL) { + dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n", + myri10ge_fw_name); + set_fw_name(mgp, myri10ge_fw_name, false); + } else if (old_fw == myri10ge_fw_aligned) + set_fw_name(mgp, myri10ge_fw_rss_aligned, false); + else + set_fw_name(mgp, myri10ge_fw_rss_unaligned, false); + status = myri10ge_load_firmware(mgp, 0); + if (status != 0) { + dev_info(&pdev->dev, "Rss firmware not found\n"); + if (old_allocated) + kfree(old_fw); + return; + } + + /* hit the board with a reset to ensure it is alive */ + memset(&cmd, 0, sizeof(cmd)); + status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0); + if (status != 0) { + dev_err(&mgp->pdev->dev, "failed reset\n"); + goto abort_with_fw; + } + + mgp->max_intr_slots = cmd.data0 / sizeof(struct mcp_slot); + + /* tell it the size of the interrupt queues */ + cmd.data0 = mgp->max_intr_slots * sizeof(struct mcp_slot); + status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0); + if (status != 0) { + dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_SET_INTRQ_SIZE\n"); + goto abort_with_fw; + } + + /* ask the maximum number of slices it supports */ + status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0); + if (status != 0) + goto abort_with_fw; + else + mgp->num_slices = cmd.data0; + + /* Only allow multiple slices if MSI-X is usable */ + if (!myri10ge_msi) { + goto abort_with_fw; + } + + /* if the admin did not specify a limit to how many + * slices we should use, cap it automatically to the + * number of CPUs currently online */ + if (myri10ge_max_slices == -1) + myri10ge_max_slices = ncpus; + + if (mgp->num_slices > myri10ge_max_slices) + mgp->num_slices = myri10ge_max_slices; + + /* Now try to allocate as many MSI-X vectors as we have + * slices. We give up on MSI-X if we can only get a single + * vector. */ + + mgp->msix_vectors = kcalloc(mgp->num_slices, sizeof(*mgp->msix_vectors), + GFP_KERNEL); + if (mgp->msix_vectors == NULL) + goto no_msix; + for (i = 0; i < mgp->num_slices; i++) { + mgp->msix_vectors[i].entry = i; + } + + while (mgp->num_slices > 1) { + mgp->num_slices = rounddown_pow_of_two(mgp->num_slices); + if (mgp->num_slices == 1) + goto no_msix; + status = pci_enable_msix_range(pdev, + mgp->msix_vectors, + mgp->num_slices, + mgp->num_slices); + if (status < 0) + goto no_msix; + + pci_disable_msix(pdev); + + if (status == mgp->num_slices) { + if (old_allocated) + kfree(old_fw); + return; + } else { + mgp->num_slices = status; + } + } + +no_msix: + if (mgp->msix_vectors != NULL) { + kfree(mgp->msix_vectors); + mgp->msix_vectors = NULL; + } + +abort_with_fw: + mgp->num_slices = 1; + set_fw_name(mgp, old_fw, old_allocated); + myri10ge_load_firmware(mgp, 0); +} + +static const struct net_device_ops myri10ge_netdev_ops = { + .ndo_open = myri10ge_open, + .ndo_stop = myri10ge_close, + .ndo_start_xmit = myri10ge_xmit, + .ndo_get_stats64 = myri10ge_get_stats, + .ndo_validate_addr = eth_validate_addr, + .ndo_change_mtu = myri10ge_change_mtu, + .ndo_set_rx_mode = myri10ge_set_multicast_list, + .ndo_set_mac_address = myri10ge_set_mac_address, +}; + +static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + struct net_device *netdev; + struct myri10ge_priv *mgp; + struct device *dev = &pdev->dev; + int 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) + return -ENOMEM; + + SET_NETDEV_DEV(netdev, &pdev->dev); + + mgp = netdev_priv(netdev); + mgp->dev = netdev; + mgp->pdev = pdev; + mgp->pause = myri10ge_flow_control; + mgp->intr_coal_delay = myri10ge_intr_coal_delay; + mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT); + mgp->board_number = board_number; + init_waitqueue_head(&mgp->down_wq); + + if (pci_enable_device(pdev)) { + dev_err(&pdev->dev, "pci_enable_device call failed\n"); + status = -ENODEV; + goto abort_with_netdev; + } + + /* Find the vendor-specific cap so we can check + * the reboot register later on */ + mgp->vendor_specific_offset + = pci_find_capability(pdev, PCI_CAP_ID_VNDR); + + /* Set our max read request to 4KB */ + status = pcie_set_readrq(pdev, 4096); + if (status != 0) { + dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n", + status); + goto abort_with_enabled; + } + + myri10ge_mask_surprise_down(pdev); + pci_set_master(pdev); + 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) { + status = -ENOMEM; + goto abort_with_enabled; + } + + mgp->board_span = pci_resource_len(pdev, 0); + mgp->iomem_base = pci_resource_start(pdev, 0); + mgp->wc_cookie = arch_phys_wc_add(mgp->iomem_base, mgp->board_span); + mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span); + if (mgp->sram == NULL) { + dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n", + mgp->board_span, mgp->iomem_base); + status = -ENXIO; + goto abort_with_mtrr; + } + hdr_offset = + swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET)) & 0xffffc; + ss_offset = hdr_offset + offsetof(struct mcp_gen_header, string_specs); + mgp->sram_size = swab32(readl(mgp->sram + ss_offset)); + if (mgp->sram_size > mgp->board_span || + mgp->sram_size <= MYRI10GE_FW_OFFSET) { + dev_err(&pdev->dev, + "invalid sram_size %dB or board span %ldB\n", + mgp->sram_size, mgp->board_span); + status = -EINVAL; + goto abort_with_ioremap; + } + memcpy_fromio(mgp->eeprom_strings, + mgp->sram + mgp->sram_size, MYRI10GE_EEPROM_STRINGS_SIZE); + memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2); + status = myri10ge_read_mac_addr(mgp); + if (status) + goto abort_with_ioremap; + + 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); + + /* MTU range: 68 - 9000 */ + netdev->min_mtu = ETH_MIN_MTU; + netdev->max_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN; + + if (myri10ge_initial_mtu > netdev->max_mtu) + myri10ge_initial_mtu = netdev->max_mtu; + if (myri10ge_initial_mtu < netdev->min_mtu) + myri10ge_initial_mtu = netdev->min_mtu; + + netdev->mtu = myri10ge_initial_mtu; + + netdev->netdev_ops = &myri10ge_netdev_ops; + netdev->hw_features = mgp->features | NETIF_F_RXCSUM; + + /* fake NETIF_F_HW_VLAN_CTAG_RX for good GRO performance */ + netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; + + netdev->features = netdev->hw_features; + + 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). */ + status = myri10ge_request_irq(mgp); + if (status != 0) + goto abort_with_slices; + myri10ge_free_irq(mgp); + + /* Save configuration space to be restored if the + * nic resets due to a parity error */ + pci_save_state(pdev); + + /* Setup the watchdog timer */ + timer_setup(&mgp->watchdog_timer, myri10ge_watchdog_timer, 0); + + netdev->ethtool_ops = &myri10ge_ethtool_ops; + INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog); + status = register_netdev(netdev); + if (status != 0) { + dev_err(&pdev->dev, "register_netdev failed: %d\n", status); + goto abort_with_state; + } + if (mgp->msix_enabled) + dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, MTRR %s, WC Enabled\n", + mgp->num_slices, mgp->tx_boundary, mgp->fw_name, + (mgp->wc_cookie > 0 ? "Enabled" : "Disabled")); + else + dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, MTRR %s, WC Enabled\n", + mgp->msi_enabled ? "MSI" : "xPIC", + pdev->irq, mgp->tx_boundary, mgp->fw_name, + (mgp->wc_cookie > 0 ? "Enabled" : "Disabled")); + + board_number++; + return 0; + +abort_with_state: + pci_restore_state(pdev); + +abort_with_slices: + myri10ge_free_slices(mgp); + +abort_with_firmware: + myri10ge_dummy_rdma(mgp, 0); + +abort_with_ioremap: + if (mgp->mac_addr_string != NULL) + dev_err(&pdev->dev, + "myri10ge_probe() failed: MAC=%s, SN=%ld\n", + mgp->mac_addr_string, mgp->serial_number); + iounmap(mgp->sram); + +abort_with_mtrr: + arch_phys_wc_del(mgp->wc_cookie); + dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd), + mgp->cmd, mgp->cmd_bus); + +abort_with_enabled: + pci_disable_device(pdev); + +abort_with_netdev: + set_fw_name(mgp, NULL, false); + free_netdev(netdev); + return status; +} + +/* + * myri10ge_remove + * + * Does what is necessary to shutdown one Myrinet device. Called + * once for each Myrinet card by the kernel when a module is + * unloaded. + */ +static void myri10ge_remove(struct pci_dev *pdev) +{ + struct myri10ge_priv *mgp; + struct net_device *netdev; + + mgp = pci_get_drvdata(pdev); + if (mgp == NULL) + return; + + cancel_work_sync(&mgp->watchdog_work); + netdev = mgp->dev; + unregister_netdev(netdev); + +#ifdef CONFIG_MYRI10GE_DCA + myri10ge_teardown_dca(mgp); +#endif + myri10ge_dummy_rdma(mgp, 0); + + /* avoid a memory leak */ + pci_restore_state(pdev); + + iounmap(mgp->sram); + arch_phys_wc_del(mgp->wc_cookie); + myri10ge_free_slices(mgp); + kfree(mgp->msix_vectors); + dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd), + mgp->cmd, mgp->cmd_bus); + + set_fw_name(mgp, NULL, false); + free_netdev(netdev); + pci_disable_device(pdev); +} + +#define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E 0x0008 +#define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9 0x0009 + +static const struct pci_device_id myri10ge_pci_tbl[] = { + {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)}, + {PCI_DEVICE + (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)}, + {0}, +}; + +MODULE_DEVICE_TABLE(pci, myri10ge_pci_tbl); + +static 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); |