Brice Goglin
2006-05-17T22:06:17Z

[PATCH 3/4] myri10ge - Driver core

The core of the myri10ge driver.

Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Andrew J. Gallatin <gallatin@myri.com>

myri10ge.c | 2836 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 2836 insertions(+)

--- /dev/null 2006-05-16 20:08:50.920483500 +0200
+++ linux-tmp//drivers/net/myri10ge/myri10ge.c 2006-05-17 11:17:26.000000000 +0200
@@ -0,0 +1,2836 @@
+/*************************************************************************
+ * myri10ge.c: Myricom Myri-10G Ethernet driver.
+ *
+ * Copyright (C) 2005, 2006 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 REGENTS 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 REGENTS 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
+ *************************************************************************/
+
+#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/etherdevice.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.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/version.h>
+#include <linux/timer.h>
+#include <linux/vmalloc.h>
+#include <linux/crc32.h>
+#include <linux/moduleparam.h>
+#include <linux/io.h>
+#include <net/checksum.h>
+#include <asm/byteorder.h>
+#include <asm/io.h>
+#include <asm/pci.h>
+#include <asm/processor.h>
+#ifdef CONFIG_MTRR
+#include <asm/mtrr.h>
+#endif
+
+#include "myri10ge_mcp.h"
+#include "myri10ge_mcp_gen_header.h"
+
+#define MYRI10GE_VERSION_STR "0.9.0"
+
+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_MCP_ETHER_MAX_SEND_DESC_TSO ((65536 / 2048) * 2)
+
+struct myri10ge_rx_buffer_state {
+ struct sk_buff *skb;
+ DECLARE_PCI_UNMAP_ADDR(bus)
+ DECLARE_PCI_UNMAP_LEN(len)
+};
+
+struct myri10ge_tx_buffer_state {
+ struct sk_buff *skb;
+ int last;
+ DECLARE_PCI_UNMAP_ADDR(bus)
+ DECLARE_PCI_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 */
+ u8 __iomem *wc_fifo; /* w/c rx dma addr fifo address */
+ struct mcp_kreq_ether_recv *shadow; /* host shadow of recv ring */
+ struct myri10ge_rx_buffer_state *info;
+ int cnt;
+ int alloc_fail;
+ int mask; /* number of rx slots -1 */
+};
+
+struct myri10ge_tx_buf {
+ struct mcp_kreq_ether_send __iomem *lanai; /* lanai ptr for sendq */
+ u8 __iomem *wc_fifo; /* w/c send fifo address */
+ 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 boundary; /* boundary transmits cannot cross */
+ int req ____cacheline_aligned; /* transmit slots submitted */
+ int pkt_start; /* packets started */
+ int done ____cacheline_aligned; /* transmit slots completed */
+ int pkt_done; /* packets completed */
+};
+
+struct myri10ge_rx_done {
+ struct mcp_slot *entry;
+ dma_addr_t bus;
+ int cnt;
+ int idx;
+};
+
+struct myri10ge_priv {
+ int running; /* running? */
+ int csum_flag; /* rx_csums? */
+ 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;
+ int small_bytes;
+ struct net_device *dev;
+ struct net_device_stats stats;
+ volatile u8 __iomem *sram;
+ int sram_size;
+ unsigned long board_span;
+ unsigned long iomem_base;
+ volatile u32 __iomem *irq_claim;
+ volatile u32 __iomem *irq_deassert;
+ char *mac_addr_string;
+ struct mcp_cmd_response *cmd;
+ dma_addr_t cmd_bus;
+ struct mcp_irq_data *fw_stats;
+ dma_addr_t fw_stats_bus;
+ struct pci_dev *pdev;
+ int msi_enabled;
+ unsigned int link_state;
+ unsigned int rdma_tags_available;
+ int intr_coal_delay;
+ volatile u32 __iomem *intr_coal_delay_ptr;
+ int mtrr;
+ int wake_queue;
+ int stop_queue;
+ int down_cnt;
+ wait_queue_head_t down_wq;
+ struct work_struct watchdog_work;
+ struct timer_list watchdog_timer;
+ int watchdog_tx_done;
+ int watchdog_resets;
+ int tx_linearized;
+ int pause;
+ char *fw_name;
+ char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
+ char fw_version[128];
+ u8 mac_addr[6]; /* eeprom mac address */
+ unsigned long serial_number;
+ int vendor_specific_offset;
+ u32 devctl;
+ u16 msi_flags;
+ u32 pm_state[16];
+ u32 read_dma;
+ u32 write_dma;
+ u32 read_write_dma;
+};
+
+static char *myri10ge_fw_name = NULL;
+static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
+static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
+static int myri10ge_ecrc_enable = 1;
+static int myri10ge_max_intr_slots = 1024;
+static int myri10ge_small_bytes = -1; /* -1 == auto */
+static int myri10ge_msi = 1; /* enable msi by default */
+static int myri10ge_intr_coal_delay = 25;
+static int myri10ge_flow_control = 1;
+static int myri10ge_deassert_wait = 1;
+static int myri10ge_force_firmware = 0;
+static int myri10ge_skb_cross_4k = 0;
+static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
+static int myri10ge_napi_weight = 64;
+static int myri10ge_watchdog_timeout = 1;
+static int myri10ge_max_irq_loops = 1048576;
+
+module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name\n");
+module_param(myri10ge_max_intr_slots, int, S_IRUGO);
+MODULE_PARM_DESC(myri10ge_max_intr_slots, "Interrupt queue slots\n");
+module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets\n");
+module_param(myri10ge_msi, int, S_IRUGO);
+MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts\n");
+module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
+MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay\n");
+module_param(myri10ge_ecrc_enable, int, S_IRUGO);
+MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E\n");
+module_param(myri10ge_flow_control, int, S_IRUGO);
+MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter\n");
+module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(myri10ge_deassert_wait,
+ "Wait when deasserting legacy interrupts\n");
+module_param(myri10ge_force_firmware, int, S_IRUGO);
+MODULE_PARM_DESC(myri10ge_force_firmware,
+ "Force firmware to assume aligned completions\n");
+module_param(myri10ge_skb_cross_4k, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(myri10ge_skb_cross_4k,
+ "Can a small skb cross a 4KB boundary?\n");
+module_param(myri10ge_initial_mtu, int, S_IRUGO);
+MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU\n");
+module_param(myri10ge_napi_weight, int, S_IRUGO);
+MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight\n");
+module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
+MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout\n");
+module_param(myri10ge_max_irq_loops, int, S_IRUGO);
+MODULE_PARM_DESC(myri10ge_max_irq_loops,
+ "Set stuck legacy IRQ detection threshold\n");
+
+#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 int
+myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd, struct myri10ge_cmd *data)
+{
+ struct mcp_cmd *buf;
+ char buf_bytes[sizeof(*buf) + 8];
+ volatile struct mcp_cmd_response *response = mgp->cmd;
+ volatile char __iomem *cmd_addr = mgp->sram + MYRI10GE_MCP_CMD_OFFSET;
+ 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 = 0xffffffff;
+ mb();
+ myri10ge_pio_copy((void __iomem *)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
+ */
+ for (sleep_total = 0;
+ sleep_total < (15 * 1000) && response->result == 0xffffffff;
+ sleep_total += 10) {
+ udelay(10);
+ }
+ result = ntohl(response->result);
+ value = ntohl(response->data);
+ if (result != 0xffffffff) {
+ if (result == 0) {
+ data->data0 = value;
+ return 0;
+ } 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((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)
+{
+ volatile u32 *confirm;
+ volatile char __iomem *submit;
+ u32 buf[16];
+ u32 dma_low, dma_high;
+ int i;
+
+ /* clear confirmation addr */
+ confirm = (volatile u32 *)mgp->cmd;
+ *confirm = 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] = htonl(0xffffffff); /* 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 + 0xfc01c0;
+
+ myri10ge_pio_copy((void __iomem *)submit, &buf, sizeof(buf));
+ for (i = 0; *confirm != 0xffffffff && i < 20; i++)
+ udelay(1000);
+ if (*confirm != 0xffffffff) {
+ 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;
+ int major, minor;
+
+ /* check firmware type */
+ if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
+ dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
+ return -EINVAL;
+ }
+
+ /* save firmware version for ethtool */
+ strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
+
+ sscanf(mgp->fw_version, "%d.%d", &major, &minor);
+
+ if (!(major == MYRI10GE_MCP_VERSION_MAJOR
+ && minor == MYRI10GE_MCP_VERSION_MINOR)) {
+ dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
+ dev_err(dev, "Driver needs %d.%d\n", MYRI10GE_MCP_VERSION_MAJOR,
+ MYRI10GE_MCP_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;
+ struct mcp_gen_header *hdr;
+ size_t hdr_offset;
+ int status;
+
+ 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(*(u32 *) (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);
+ memcpy_toio(mgp->sram + MYRI10GE_FW_OFFSET, fw->data, fw->size);
+ /* corruption checking is good for parity recovery and buggy chipset */
+ memcpy_fromio(fw->data, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
+ reread_crc = crc32(~0, fw->data, fw->size);
+ 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 = ntohl(__raw_readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
+
+ if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
+ dev_err(dev, "Running firmware has bad header offset (%d)\n",
+ (int)hdr_offset);
+ return -EIO;
+ }
+
+ /* copy header of running firmware from SRAM to host memory to
+ * validate firmware */
+ hdr = kmalloc(bytes, GFP_KERNEL);
+ if (hdr == NULL) {
+ dev_err(dev, "could not malloc firmware hdr\n");
+ return -ENOMEM;
+ }
+ memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
+ status = myri10ge_validate_firmware(mgp, hdr);
+ kfree(hdr);
+ return status;
+}
+
+static int myri10ge_load_firmware(struct myri10ge_priv *mgp)
+{
+ volatile u32 *confirm;
+ volatile char __iomem *submit;
+ u32 buf[16];
+ u32 dma_low, dma_high, size;
+ int status, i;
+
+ status = myri10ge_load_hotplug_firmware(mgp, &size);
+ if (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");
+ }
+
+ mgp->fw_name = "adopted";
+ mgp->tx.boundary = 2048;
+ return status;
+ }
+
+ /* clear confirmation addr */
+ confirm = (volatile u32 *)mgp->cmd;
+ *confirm = 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] = htonl(0xffffffff); /* 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 + 0xfc0000;
+
+ myri10ge_pio_copy((void __iomem *)submit, &buf, sizeof(buf));
+ mb();
+ udelay(1000);
+ mb();
+ i = 0;
+ while (*confirm != 0xffffffff && i < 20) {
+ udelay(1000);
+ i++;
+ }
+ if (*confirm != 0xffffffff) {
+ dev_err(&mgp->pdev->dev, "handoff failed\n");
+ return -ENXIO;
+ }
+ dev_info(&mgp->pdev->dev, "handoff confirmed\n");
+ myri10ge_dummy_rdma(mgp, mgp->tx.boundary != 4096);
+
+ return 0;
+}
+
+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, MYRI10GE_MCP_SET_MAC_ADDRESS, &cmd);
+ return status;
+}
+
+static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
+{
+ struct myri10ge_cmd cmd;
+ int status, ctl;
+
+ ctl = pause ? MYRI10GE_MCP_ENABLE_FLOW_CONTROL :
+ MYRI10GE_MCP_DISABLE_FLOW_CONTROL;
+ status = myri10ge_send_cmd(mgp, ctl, &cmd);
+
+ if (status) {
+ printk(KERN_ERR
+ "myri10ge: %s: Failed to set flow control mode\n",
+ mgp->dev->name);
+ return status;
+ }
+ mgp->pause = pause;
+ return 0;
+}
+
+static void myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc)
+{
+ struct myri10ge_cmd cmd;
+ int status, ctl;
+
+ ctl = promisc ? MYRI10GE_MCP_ENABLE_PROMISC :
+ MYRI10GE_MCP_DISABLE_PROMISC;
+ status = myri10ge_send_cmd(mgp, ctl, &cmd);
+ if (status) {
+ printk(KERN_ERR "myri10ge: %s: Failed to set promisc mode\n",
+ mgp->dev->name);
+ }
+}
+
+static int myri10ge_reset(struct myri10ge_priv *mgp)
+{
+
+ struct myri10ge_cmd cmd;
+ int status;
+ size_t bytes;
+ u32 len;
+
+ /* 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, MYRI10GE_MCP_CMD_RESET, &cmd);
+ if (status != 0) {
+ dev_err(&mgp->pdev->dev, "failed reset\n");
+ return -ENXIO;
+ }
+
+ /* Now exchange information about interrupts */
+
+ bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
+ memset(mgp->rx_done.entry, 0, bytes);
+ cmd.data0 = (u32) bytes;
+ status = myri10ge_send_cmd(mgp, MYRI10GE_MCP_CMD_SET_INTRQ_SIZE, &cmd);
+ cmd.data0 = MYRI10GE_LOWPART_TO_U32(mgp->rx_done.bus);
+ cmd.data1 = MYRI10GE_HIGHPART_TO_U32(mgp->rx_done.bus);
+ status |= myri10ge_send_cmd(mgp, MYRI10GE_MCP_CMD_SET_INTRQ_DMA, &cmd);
+
+ status |=
+ myri10ge_send_cmd(mgp, MYRI10GE_MCP_CMD_GET_IRQ_ACK_OFFSET, &cmd);
+ mgp->irq_claim = (__iomem u32 *) (mgp->sram + cmd.data0);
+ if (!mgp->msi_enabled) {
+ status |= myri10ge_send_cmd
+ (mgp, MYRI10GE_MCP_CMD_GET_IRQ_DEASSERT_OFFSET, &cmd);
+ mgp->irq_deassert = (__iomem u32 *) (mgp->sram + cmd.data0);
+
+ }
+ status |= myri10ge_send_cmd
+ (mgp, MYRI10GE_MCP_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd);
+ mgp->intr_coal_delay_ptr = (__iomem u32 *) (mgp->sram + cmd.data0);
+ if (status != 0) {
+ dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
+ return status;
+ }
+ __raw_writel(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
+
+ /* 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(mgp->rx_done.bus);
+ cmd.data1 = MYRI10GE_HIGHPART_TO_U32(mgp->rx_done.bus);
+ cmd.data2 = len * 0x10000;
+ status = myri10ge_send_cmd(mgp, MYRI10GE_MCP_DMA_TEST, &cmd);
+ if (status == 0)
+ mgp->read_dma = ((cmd.data0 >> 16) * len * 2) /
+ (cmd.data0 & 0xffff);
+ else
+ dev_warn(&mgp->pdev->dev, "DMA read benchmark failed: %d\n",
+ status);
+ cmd.data0 = MYRI10GE_LOWPART_TO_U32(mgp->rx_done.bus);
+ cmd.data1 = MYRI10GE_HIGHPART_TO_U32(mgp->rx_done.bus);
+ cmd.data2 = len * 0x1;
+ status = myri10ge_send_cmd(mgp, MYRI10GE_MCP_DMA_TEST, &cmd);
+ if (status == 0)
+ mgp->write_dma = ((cmd.data0 >> 16) * len * 2) /
+ (cmd.data0 & 0xffff);
+ else
+ dev_warn(&mgp->pdev->dev, "DMA write benchmark failed: %d\n",
+ status);
+
+ cmd.data0 = MYRI10GE_LOWPART_TO_U32(mgp->rx_done.bus);
+ cmd.data1 = MYRI10GE_HIGHPART_TO_U32(mgp->rx_done.bus);
+ cmd.data2 = len * 0x10001;
+ status = myri10ge_send_cmd(mgp, MYRI10GE_MCP_DMA_TEST, &cmd);
+ if (status == 0)
+ mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
+ (cmd.data0 & 0xffff);
+ else
+ dev_warn(&mgp->pdev->dev,
+ "DMA read/write benchmark failed: %d\n", status);
+
+ memset(mgp->rx_done.entry, 0, bytes);
+
+ /* reset mcp/driver shared state back to 0 */
+ mgp->tx.req = 0;
+ mgp->tx.done = 0;
+ mgp->tx.pkt_start = 0;
+ mgp->tx.pkt_done = 0;
+ mgp->rx_big.cnt = 0;
+ mgp->rx_small.cnt = 0;
+ mgp->rx_done.idx = 0;
+ mgp->rx_done.cnt = 0;
+ status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
+ myri10ge_change_promisc(mgp, 0);
+ myri10ge_change_pause(mgp, mgp->pause);
+ return status;
+}
+
+static inline void
+myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
+ struct mcp_kreq_ether_recv *src)
+{
+ u32 low;
+
+ low = src->addr_low;
+ src->addr_low = DMA_32BIT_MASK;
+ myri10ge_pio_copy(dst, src, 8 * sizeof(*src));
+ mb();
+ src->addr_low = low;
+ *(u32 __force *) & dst->addr_low = src->addr_low;
+ mb();
+}
+
+/*
+ * Set of routunes to get a new receive buffer. Any buffer which
+ * crosses a 4KB boundary must start on a 4KB boundary due to PCIe
+ * wdma restrictions. We also try to align any smaller allocation to
+ * at least a 16 byte boundary for efficiency. We assume the linux
+ * memory allocator works by powers of 2, and will not return memory
+ * smaller than 2KB which crosses a 4KB boundary. If it does, we fall
+ * back to allocating 2x as much space as required.
+ *
+ * We intend to replace large (>4KB) skb allocations by using
+ * pages directly and building a fraglist in the near future.
+ */
+
+static inline struct sk_buff *myri10ge_alloc_big(int bytes)
+{
+ struct sk_buff *skb;
+ unsigned long data, roundup;
+
+ skb = dev_alloc_skb(bytes + 4096 + MYRI10GE_MCP_ETHER_PAD);
+ if (skb == NULL)
+ return NULL;
+
+ /* Correct skb->truesize so that socket buffer
+ * accounting is not confused the rounding we must
+ * do to satisfy alignment constraints.
+ */
+ skb->truesize -= 4096;
+
+ data = (unsigned long)(skb->data);
+ roundup = (-data) & (4095);
+ skb_reserve(skb, roundup);
+ return skb;
+}
+
+/* Allocate 2x as much space as required and use whichever portion
+ * does not cross a 4KB boundary */
+static inline struct sk_buff *myri10ge_alloc_small_safe(unsigned int bytes)
+{
+ struct sk_buff *skb;
+ unsigned long data, boundary;
+
+ skb = dev_alloc_skb(2 * (bytes + MYRI10GE_MCP_ETHER_PAD) - 1);
+ if (unlikely(skb == NULL))
+ return NULL;
+
+ /* Correct skb->truesize so that socket buffer
+ * accounting is not confused the rounding we must
+ * do to satisfy alignment constraints.
+ */
+ skb->truesize -= bytes + MYRI10GE_MCP_ETHER_PAD;
+
+ data = (unsigned long)(skb->data);
+ boundary = (data + 4095UL) & ~4095UL;
+ if ((boundary - data) >= (bytes + MYRI10GE_MCP_ETHER_PAD)) {
+ return skb;
+ }
+ skb_reserve(skb, boundary - data);
+ return skb;
+}
+
+/* Allocate just enough space, and verify that the allocated
+ * space does not cross a 4KB boundary */
+static inline struct sk_buff *myri10ge_alloc_small(int bytes)
+{
+ struct sk_buff *skb;
+ unsigned long roundup, data, end;
+
+ skb = dev_alloc_skb(bytes + 16 + MYRI10GE_MCP_ETHER_PAD);
+ if (unlikely(skb == NULL))
+ return NULL;
+
+ /* Round allocated buffer to 16 byte boundary */
+ data = (unsigned long)(skb->data);
+ roundup = (-data) & 15UL;
+ skb_reserve(skb, roundup);
+ /* Verify that the data buffer does not cross a page boundary */
+ data = (unsigned long)(skb->data);
+ end = data + bytes + MYRI10GE_MCP_ETHER_PAD - 1;
+ if (unlikely(((end >> 12) != (data >> 12)) && (data & 4095UL))) {
+ printk
+ ("myri10ge_alloc_small: small skb crossed 4KB boundary\n");
+ myri10ge_skb_cross_4k = 1;
+ dev_kfree_skb_any(skb);
+ skb = myri10ge_alloc_small_safe(bytes);
+ }
+ return skb;
+}
+
+static inline int
+myri10ge_getbuf(struct myri10ge_rx_buf *rx, struct pci_dev *pdev, int bytes,
+ int idx)
+{
+ struct sk_buff *skb;
+ dma_addr_t bus;
+ int len, retval = 0;
+
+ bytes += VLAN_HLEN; /* account for 802.1q vlan tag */
+
+ if ((bytes + MYRI10GE_MCP_ETHER_PAD) >
+ (4096 - 16) /* linux overhead */ ) {
+ skb = myri10ge_alloc_big(bytes);
+ } else {
+ if (myri10ge_skb_cross_4k) {
+ skb = myri10ge_alloc_small_safe(bytes);
+ } else {
+ skb = myri10ge_alloc_small(bytes);
+ }
+ }
+ if (unlikely(skb == NULL)) {
+ rx->alloc_fail++;
+ retval = -ENOBUFS;
+ goto done;
+ }
+
+ /* set len so that it only covers the area we
+ * need mapped for DMA */
+ len = bytes + MYRI10GE_MCP_ETHER_PAD;
+
+ bus = pci_map_single(pdev, skb->data, len, PCI_DMA_FROMDEVICE);
+ rx->info[idx].skb = skb;
+ pci_unmap_addr_set(&rx->info[idx], bus, bus);
+ pci_unmap_len_set(&rx->info[idx], len, len);
+ rx->shadow[idx].addr_low = htonl(MYRI10GE_LOWPART_TO_U32(bus));
+ rx->shadow[idx].addr_high = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
+
+ done:
+ /* copy 8 descriptors (64-bytes) to the mcp at a time */
+ if ((idx & 7) == 7) {
+ if (rx->wc_fifo == NULL) {
+ myri10ge_submit_8rx(&rx->lanai[idx - 7],
+ &rx->shadow[idx - 7]);
+ } else {
+ mb();
+ myri10ge_pio_copy((void __iomem *)rx->wc_fifo,
+ &rx->shadow[idx - 7], 64);
+ }
+ }
+ return retval;
+}
+
+static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, u16 hw_csum)
+{
+ struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data);
+
+ if ((skb->protocol == ntohs(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_HW;
+ }
+}
+
+static inline unsigned long
+myri10ge_rx_done(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
+ int bytes, int len, int csum)
+{
+ dma_addr_t bus;
+ struct sk_buff *skb;
+ int idx, unmap_len;
+
+ idx = rx->cnt & rx->mask;
+ rx->cnt++;
+
+ /* save a pointer to the received skb */
+ skb = rx->info[idx].skb;
+ bus = pci_unmap_addr(&rx->info[idx], bus);
+ unmap_len = pci_unmap_len(&rx->info[idx], len);
+
+ /* try to replace the received skb */
+ if (myri10ge_getbuf(rx, mgp->pdev, bytes, idx)) {
+ /* drop the frame -- the old skbuf is re-cycled */
+ mgp->stats.rx_dropped += 1;
+ return 0;
+ }
+
+ /* unmap the recvd skb */
+ pci_unmap_single(mgp->pdev, bus, unmap_len, PCI_DMA_FROMDEVICE);
+
+ /* mcp implicitly skips 1st bytes so that packet is properly
+ * aligned */
+ skb_reserve(skb, MYRI10GE_MCP_ETHER_PAD);
+
+ /* set the length of the frame */
+ skb_put(skb, len);
+
+ skb->protocol = eth_type_trans(skb, mgp->dev);
+ skb->dev = mgp->dev;
+ if (mgp->csum_flag) {
+ if ((skb->protocol == ntohs(ETH_P_IP)) ||
+ (skb->protocol == ntohs(ETH_P_IPV6))) {
+ skb->csum = ntohs((u16) csum);
+ skb->ip_summed = CHECKSUM_HW;
+ } else {
+ myri10ge_vlan_ip_csum(skb, ntohs((u16) csum));
+ }
+ }
+
+ netif_receive_skb(skb);
+ mgp->dev->last_rx = jiffies;
+ return 1;
+}
+
+static inline void myri10ge_tx_done(struct myri10ge_priv *mgp, int mcp_index)
+{
+ struct pci_dev *pdev = mgp->pdev;
+ struct myri10ge_tx_buf *tx = &mgp->tx;
+ struct sk_buff *skb;
+ int idx, len;
+ int limit = 0;
+
+ 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 = pci_unmap_len(&tx->info[idx], len);
+ pci_unmap_len_set(&tx->info[idx], len, 0);
+ if (skb) {
+ mgp->stats.tx_bytes += skb->len;
+ mgp->stats.tx_packets++;
+ dev_kfree_skb_irq(skb);
+ if (len)
+ pci_unmap_single(pdev,
+ pci_unmap_addr(&tx->info[idx],
+ bus), len,
+ PCI_DMA_TODEVICE);
+ } else {
+ if (len)
+ pci_unmap_page(pdev,
+ pci_unmap_addr(&tx->info[idx],
+ bus), len,
+ PCI_DMA_TODEVICE);
+ }
+
+ /* limit potential for livelock by only handling
+ * 2 full tx rings per call */
+ if (unlikely(++limit > 2 * tx->mask))
+ break;
+ }
+ /* start the queue if we've stopped it */
+ if (netif_queue_stopped(mgp->dev)
+ && tx->req - tx->done < (tx->mask >> 1)) {
+ mgp->wake_queue++;
+ netif_wake_queue(mgp->dev);
+ }
+}
+
+static inline void myri10ge_clean_rx_done(struct myri10ge_priv *mgp, int *limit)
+{
+ struct myri10ge_rx_done *rx_done = &mgp->rx_done;
+ unsigned long rx_bytes = 0;
+ unsigned long rx_packets = 0;
+ unsigned long rx_ok;
+
+ int idx = rx_done->idx;
+ int cnt = rx_done->cnt;
+ u16 length;
+ u16 checksum;
+
+ while (rx_done->entry[idx].length != 0 && *limit != 0) {
+ length = ntohs(rx_done->entry[idx].length);
+ rx_done->entry[idx].length = 0;
+ checksum = ntohs(rx_done->entry[idx].checksum);
+ if (length <= mgp->small_bytes)
+ rx_ok = myri10ge_rx_done(mgp, &mgp->rx_small,
+ mgp->small_bytes,
+ length, checksum);
+ else
+ rx_ok = myri10ge_rx_done(mgp, &mgp->rx_big,
+ mgp->dev->mtu + ETH_HLEN,
+ length, checksum);
+ rx_packets += rx_ok;
+ rx_bytes += rx_ok * (unsigned long)length;
+ cnt++;
+ idx = cnt & (myri10ge_max_intr_slots - 1);
+
+ /* limit potential for livelock by only handling a
+ * limited number of frames. */
+ (*limit)--;
+ }
+ rx_done->idx = idx;
+ rx_done->cnt = cnt;
+ mgp->stats.rx_packets += rx_packets;
+ mgp->stats.rx_bytes += rx_bytes;
+}
+
+static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
+{
+ struct mcp_irq_data *stats = mgp->fw_stats;
+
+ if (unlikely(stats->stats_updated)) {
+ if (mgp->link_state != stats->link_up) {
+ mgp->link_state = stats->link_up;
+ if (mgp->link_state) {
+ printk("myri10ge: %s: link up\n",
+ mgp->dev->name);
+ netif_carrier_on(mgp->dev);
+ } else {
+ printk("myri10ge: %s: link down\n",
+ mgp->dev->name);
+ netif_carrier_off(mgp->dev);
+ }
+ }
+ if (mgp->rdma_tags_available !=
+ ntohl(mgp->fw_stats->rdma_tags_available)) {
+ mgp->rdma_tags_available =
+ ntohl(mgp->fw_stats->rdma_tags_available);
+ printk("myri10ge: %s: RDMA timed out! "
+ "%d tags left\n", mgp->dev->name,
+ mgp->rdma_tags_available);
+ }
+ mgp->down_cnt += stats->link_down;
+ if (stats->link_down)
+ wake_up(&mgp->down_wq);
+ }
+}
+
+static int myri10ge_poll(struct net_device *netdev, int *budget)
+{
+ struct myri10ge_priv *mgp = netdev_priv(netdev);
+ struct myri10ge_rx_done *rx_done = &mgp->rx_done;
+ int limit, orig_limit, work_done;
+
+ /* process as many rx events as NAPI will allow */
+ limit = min(*budget, netdev->quota);
+ orig_limit = limit;
+ myri10ge_clean_rx_done(mgp, &limit);
+ work_done = orig_limit - limit;
+ *budget -= work_done;
+ netdev->quota -= work_done;
+
+ if (rx_done->entry[rx_done->idx].length == 0 || !netif_running(netdev)) {
+ netif_rx_complete(netdev);
+ __raw_writel(htonl(3), mgp->irq_claim);
+ return 0;
+ }
+ return 1;
+}
+
+static irqreturn_t myri10ge_intr(int irq, void *arg, struct pt_regs *regs)
+{
+ struct myri10ge_priv *mgp = arg;
+ struct mcp_irq_data *stats = mgp->fw_stats;
+ struct myri10ge_tx_buf *tx = &mgp->tx;
+ u32 send_done_count;
+ int i;
+
+ /* 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) {
+ netif_rx_schedule(mgp->dev);
+ }
+
+ if (!mgp->msi_enabled) {
+ __raw_writel(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;
+ do {
+ 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(mgp, (int)send_done_count);
+ if (*((u8 * volatile)&stats->valid) == 0)
+ cpu_relax();
+ if (unlikely(i > myri10ge_max_irq_loops)) {
+ printk("myri10ge: %s: irq stuck?\n", mgp->dev->name);
+ stats->valid = 0;
+ schedule_work(&mgp->watchdog_work);
+ }
+ } while (*((u8 * volatile)&stats->valid));
+
+ myri10ge_check_statblock(mgp);
+
+ __raw_writel(htonl(3), mgp->irq_claim + 1);
+ return (IRQ_HANDLED);
+}
+
+static int
+myri10ge_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
+{
+ cmd->autoneg = AUTONEG_DISABLE;
+ cmd->speed = SPEED_10000;
+ cmd->duplex = DUPLEX_FULL;
+ 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;
+ __raw_writel(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->tx_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->rx_small.mask + 1;
+ ring->rx_max_pending = mgp->rx_big.mask + 1;
+ ring->rx_jumbo_max_pending = 0;
+ ring->tx_max_pending = mgp->rx_small.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 u32 myri10ge_get_rx_csum(struct net_device *netdev)
+{
+ struct myri10ge_priv *mgp = netdev_priv(netdev);
+ if (mgp->csum_flag)
+ return 1;
+ else
+ return 0;
+}
+
+static int myri10ge_set_rx_csum(struct net_device *netdev, u32 csum_enabled)
+{
+ struct myri10ge_priv *mgp = netdev_priv(netdev);
+ if (csum_enabled)
+ mgp->csum_flag = MYRI10GE_MCP_ETHER_FLAGS_CKSUM;
+ else
+ mgp->csum_flag = 0;
+ return 0;
+}
+
+static const char myri10ge_gstrings_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 */
+ "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
+ "serial_number", "tx_pkt_start", "tx_pkt_done",
+ "tx_req", "tx_done", "rx_small_cnt", "rx_big_cnt",
+ "wake_queue", "stop_queue", "watchdog_resets", "tx_linearized",
+ "link_up", "dropped_link_overflow", "dropped_link_error_or_filtered",
+ "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
+ "dropped_no_big_buffer"
+};
+
+#define MYRI10GE_NET_STATS_LEN 21
+#define MYRI10GE_STATS_LEN sizeof(myri10ge_gstrings_stats) / ETH_GSTRING_LEN
+
+static void
+myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
+{
+ switch (stringset) {
+ case ETH_SS_STATS:
+ memcpy(data, *myri10ge_gstrings_stats,
+ sizeof(myri10ge_gstrings_stats));
+ break;
+ }
+}
+
+static int myri10ge_get_stats_count(struct net_device *netdev)
+{
+ return MYRI10GE_STATS_LEN;
+}
+
+static void
+myri10ge_get_ethtool_stats(struct net_device *netdev,
+ struct ethtool_stats *stats, u64 * data)
+{
+ struct myri10ge_priv *mgp = netdev_priv(netdev);
+ int i;
+
+ for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
+ data[i] = ((unsigned long *)&mgp->stats)[i];
+
+ 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->tx.pkt_start;
+ data[i++] = (unsigned int)mgp->tx.pkt_done;
+ data[i++] = (unsigned int)mgp->tx.req;
+ data[i++] = (unsigned int)mgp->tx.done;
+ data[i++] = (unsigned int)mgp->rx_small.cnt;
+ data[i++] = (unsigned int)mgp->rx_big.cnt;
+ data[i++] = (unsigned int)mgp->wake_queue;
+ data[i++] = (unsigned int)mgp->stop_queue;
+ data[i++] = (unsigned int)mgp->watchdog_resets;
+ data[i++] = (unsigned int)mgp->tx_linearized;
+ data[i++] = (unsigned int)ntohl(mgp->fw_stats->link_up);
+ data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_link_overflow);
+ data[i++] =
+ (unsigned int)ntohl(mgp->fw_stats->dropped_link_error_or_filtered);
+ data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_runt);
+ data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_overrun);
+ data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_no_small_buffer);
+ data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_no_big_buffer);
+}
+
+static struct ethtool_ops myri10ge_ethtool_ops = {
+ .get_settings = myri10ge_get_settings,
+ .get_drvinfo = myri10ge_get_drvinfo,
+ .get_coalesce = myri10ge_get_coalesce,
+ .set_coalesce = myri10ge_set_coalesce,
+ .get_pauseparam = myri10ge_get_pauseparam,
+ .set_pauseparam = myri10ge_set_pauseparam,
+ .get_ringparam = myri10ge_get_ringparam,
+ .get_rx_csum = myri10ge_get_rx_csum,
+ .set_rx_csum = myri10ge_set_rx_csum,
+ .get_tx_csum = ethtool_op_get_tx_csum,
+ .set_tx_csum = ethtool_op_set_tx_csum,
+ .get_sg = ethtool_op_get_sg,
+ .set_sg = ethtool_op_set_sg,
+#ifdef NETIF_F_TSO
+ .get_tso = ethtool_op_get_tso,
+ .set_tso = ethtool_op_set_tso,
+#endif
+ .get_strings = myri10ge_get_strings,
+ .get_stats_count = myri10ge_get_stats_count,
+ .get_ethtool_stats = myri10ge_get_ethtool_stats
+};
+
+static int myri10ge_open(struct net_device *dev)
+{
+ struct myri10ge_priv *mgp;
+ size_t bytes;
+ struct myri10ge_cmd cmd;
+ int tx_ring_size, rx_ring_size;
+ int tx_ring_entries, rx_ring_entries;
+ int i, status, big_pow2;
+
+ mgp = netdev_priv(dev);
+
+ if (mgp->running != MYRI10GE_ETH_STOPPED)
+ return -EBUSY;
+
+ mgp->running = MYRI10GE_ETH_STARTING;
+ status = myri10ge_reset(mgp);
+ if (status != 0) {
+ printk(KERN_ERR "myri10ge: %s: failed reset\n", dev->name);
+ mgp->running = MYRI10GE_ETH_STOPPED;
+ return -ENXIO;
+ }
+
+ /* 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) {
+ mgp->small_bytes = 128; /* enough for a TCP header */
+ } else {
+ mgp->small_bytes = ETH_FRAME_LEN; /* enough for an ETH_DATA_LEN frame */
+ }
+ /* Override the small buffer size? */
+ if (myri10ge_small_bytes > 0) {
+ mgp->small_bytes = myri10ge_small_bytes;
+ }
+
+ /* If the user sets an obscenely small MTU, adjust the small
+ * bytes down to nearly nothing */
+ if (mgp->small_bytes >= (dev->mtu + ETH_HLEN))
+ mgp->small_bytes = 64;
+
+ /* get ring sizes */
+ status =
+ myri10ge_send_cmd(mgp, MYRI10GE_MCP_CMD_GET_SEND_RING_SIZE, &cmd);
+ tx_ring_size = cmd.data0;
+ status |=
+ myri10ge_send_cmd(mgp, MYRI10GE_MCP_CMD_GET_RX_RING_SIZE, &cmd);
+ rx_ring_size = cmd.data0;
+
+ /* get the lanai pointers to the send and receive rings */
+
+ status |=
+ myri10ge_send_cmd(mgp, MYRI10GE_MCP_CMD_GET_SEND_OFFSET, &cmd);
+ mgp->tx.lanai =
+ (struct mcp_kreq_ether_send __iomem *)(mgp->sram + cmd.data0);
+
+ status |=
+ myri10ge_send_cmd(mgp, MYRI10GE_MCP_CMD_GET_SMALL_RX_OFFSET, &cmd);
+ mgp->rx_small.lanai =
+ (struct mcp_kreq_ether_recv __iomem *)(mgp->sram + cmd.data0);
+
+ status |=
+ myri10ge_send_cmd(mgp, MYRI10GE_MCP_CMD_GET_BIG_RX_OFFSET, &cmd);
+ mgp->rx_big.lanai =
+ (struct mcp_kreq_ether_recv __iomem *)(mgp->sram + cmd.data0);
+
+ if (status != 0) {
+ printk(KERN_ERR
+ "myri10ge: %s: failed to get ring sizes or locations\n",
+ dev->name);
+ mgp->running = MYRI10GE_ETH_STOPPED;
+ return -ENXIO;
+ }
+
+ if (mgp->mtrr >= 0) {
+ mgp->tx.wc_fifo = (u8 __iomem *) mgp->sram + 0x200000;
+ mgp->rx_small.wc_fifo = (u8 __iomem *) mgp->sram + 0x300000;
+ mgp->rx_big.wc_fifo = (u8 __iomem *) mgp->sram + 0x340000;
+ } else {
+ mgp->tx.wc_fifo = NULL;
+ mgp->rx_small.wc_fifo = NULL;
+ mgp->rx_big.wc_fifo = NULL;
+ }
+
+ tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
+ rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
+ mgp->tx.mask = tx_ring_entries - 1;
+ mgp->rx_small.mask = mgp->rx_big.mask = rx_ring_entries - 1;
+
+ /* allocate the host shadow rings */
+
+ bytes = 8 + (MYRI10GE_MCP_ETHER_MAX_SEND_DESC_TSO + 4)
+ * sizeof(*mgp->tx.req_list);
+ mgp->tx.req_bytes = kmalloc(bytes, GFP_KERNEL);
+ if (mgp->tx.req_bytes == NULL)
+ goto abort_with_nothing;
+ memset(mgp->tx.req_bytes, 0, bytes);
+
+ /* ensure req_list entries are aligned to 8 bytes */
+ mgp->tx.req_list = (struct mcp_kreq_ether_send *)
+ ALIGN((unsigned long)mgp->tx.req_bytes, 8);
+
+ bytes = rx_ring_entries * sizeof(*mgp->rx_small.shadow);
+ mgp->rx_small.shadow = kmalloc(bytes, GFP_KERNEL);
+ if (mgp->rx_small.shadow == NULL)
+ goto abort_with_tx_req_bytes;
+ memset(mgp->rx_small.shadow, 0, bytes);
+
+ bytes = rx_ring_entries * sizeof(*mgp->rx_big.shadow);
+ mgp->rx_big.shadow = kmalloc(bytes, GFP_KERNEL);
+ if (mgp->rx_big.shadow == NULL)
+ goto abort_with_rx_small_shadow;
+ memset(mgp->rx_big.shadow, 0, bytes);
+
+ /* allocate the host info rings */
+
+ bytes = tx_ring_entries * sizeof(*mgp->tx.info);
+ mgp->tx.info = kmalloc(bytes, GFP_KERNEL);
+ if (mgp->tx.info == NULL)
+ goto abort_with_rx_big_shadow;
+ memset(mgp->tx.info, 0, bytes);
+
+ bytes = rx_ring_entries * sizeof(*mgp->rx_small.info);
+ mgp->rx_small.info = kmalloc(bytes, GFP_KERNEL);
+ if (mgp->rx_small.info == NULL)
+ goto abort_with_tx_info;
+ memset(mgp->rx_small.info, 0, bytes);
+
+ bytes = rx_ring_entries * sizeof(*mgp->rx_big.info);
+ mgp->rx_big.info = kmalloc(bytes, GFP_KERNEL);
+ if (mgp->rx_big.info == NULL)
+ goto abort_with_rx_small_info;
+ memset(mgp->rx_big.info, 0, bytes);
+
+ /* Fill the receive rings */
+ for (i = 0; i <= mgp->rx_small.mask; i++) {
+ status = myri10ge_getbuf(&mgp->rx_small, mgp->pdev,
+ mgp->small_bytes, i);
+ if (status) {
+ printk(KERN_ERR
+ "myri10ge: %s: alloced only %d small bufs\n",
+ dev->name, i);
+ goto abort_with_rx_small_ring;
+ }
+ }
+
+ for (i = 0; i <= mgp->rx_big.mask; i++) {
+ status =
+ myri10ge_getbuf(&mgp->rx_big, mgp->pdev,
+ dev->mtu + ETH_HLEN, i);
+ if (status) {
+ printk(KERN_ERR
+ "myri10ge: %s: alloced only %d big bufs\n",
+ dev->name, i);
+ goto abort_with_rx_big_ring;
+ }
+ }
+
+ /* 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 + MYRI10GE_MCP_ETHER_PAD;
+ while ((big_pow2 & (big_pow2 - 1)) != 0)
+ big_pow2++;
+
+ /* now give firmware buffers sizes, and MTU */
+ cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
+ status = myri10ge_send_cmd(mgp, MYRI10GE_MCP_CMD_SET_MTU, &cmd);
+ cmd.data0 = mgp->small_bytes;
+ status |=
+ myri10ge_send_cmd(mgp, MYRI10GE_MCP_CMD_SET_SMALL_BUFFER_SIZE,
+ &cmd);
+ cmd.data0 = big_pow2;
+ status |=
+ myri10ge_send_cmd(mgp, MYRI10GE_MCP_CMD_SET_BIG_BUFFER_SIZE, &cmd);
+ if (status) {
+ printk(KERN_ERR "myri10ge: %s: Couldn't set buffer sizes\n",
+ dev->name);
+ goto abort_with_rx_big_ring;
+ }
+
+ cmd.data0 = MYRI10GE_LOWPART_TO_U32(mgp->fw_stats_bus);
+ cmd.data1 = MYRI10GE_HIGHPART_TO_U32(mgp->fw_stats_bus);
+ status = myri10ge_send_cmd(mgp, MYRI10GE_MCP_CMD_SET_STATS_DMA, &cmd);
+ if (status) {
+ printk(KERN_ERR "myri10ge: %s: Couldn't set stats DMA\n",
+ dev->name);
+ goto abort_with_rx_big_ring;
+ }
+
+ mgp->link_state = -1;
+ mgp->rdma_tags_available = 15;
+
+ netif_poll_enable(mgp->dev); /* must happen prior to any irq */
+
+ status = myri10ge_send_cmd(mgp, MYRI10GE_MCP_CMD_ETHERNET_UP, &cmd);
+ if (status) {
+ printk(KERN_ERR "myri10ge: %s: Couldn't bring up link\n",
+ dev->name);
+ goto abort_with_rx_big_ring;
+ }
+
+ mgp->wake_queue = 0;
+ mgp->stop_queue = 0;
+ mgp->running = MYRI10GE_ETH_RUNNING;
+ mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
+ add_timer(&mgp->watchdog_timer);
+ netif_wake_queue(dev);
+ return 0;
+
+ abort_with_rx_big_ring:
+ for (i = 0; i <= mgp->rx_big.mask; i++) {
+ if (mgp->rx_big.info[i].skb != NULL)
+ dev_kfree_skb_any(mgp->rx_big.info[i].skb);
+ if (pci_unmap_len(&mgp->rx_big.info[i], len)) {
+ pci_unmap_single(mgp->pdev,
+ pci_unmap_addr(&mgp->rx_big.info[i],
+ bus),
+ pci_unmap_len(&mgp->rx_big.info[i],
+ len),
+ PCI_DMA_FROMDEVICE);
+ }
+ }
+
+ abort_with_rx_small_ring:
+ for (i = 0; i <= mgp->rx_small.mask; i++) {
+ if (mgp->rx_small.info[i].skb != NULL)
+ dev_kfree_skb_any(mgp->rx_small.info[i].skb);
+ if (pci_unmap_len(&mgp->rx_small.info[i], len)) {
+ pci_unmap_single(mgp->pdev,
+ pci_unmap_addr(&mgp->rx_small.info[i],
+ bus),
+ pci_unmap_len(&mgp->rx_small.info[i],
+ len),
+ PCI_DMA_FROMDEVICE);
+ }
+ }
+ kfree(mgp->rx_big.info);
+
+ abort_with_rx_small_info:
+ kfree(mgp->rx_small.info);
+
+ abort_with_tx_info:
+ kfree(mgp->tx.info);
+
+ abort_with_rx_big_shadow:
+ kfree(mgp->rx_big.shadow);
+
+ abort_with_rx_small_shadow:
+ kfree(mgp->rx_small.shadow);
+
+ abort_with_tx_req_bytes:
+ kfree(mgp->tx.req_bytes);
+ mgp->tx.req_bytes = NULL;
+ mgp->tx.req_list = NULL;
+
+ abort_with_nothing:
+ mgp->running = MYRI10GE_ETH_STOPPED;
+ return -ENOMEM;
+}
+
+static int myri10ge_close(struct net_device *dev)
+{
+ struct myri10ge_priv *mgp;
+ struct sk_buff *skb;
+ struct myri10ge_tx_buf *tx;
+ int status, i, old_down_cnt, len, idx;
+ struct myri10ge_cmd cmd;
+
+ mgp = netdev_priv(dev);
+
+ if (mgp->running != MYRI10GE_ETH_RUNNING)
+ return 0;
+
+ if (mgp->tx.req_bytes == NULL)
+ return 0;
+
+ del_timer_sync(&mgp->watchdog_timer);
+ mgp->running = MYRI10GE_ETH_STOPPING;
+ netif_poll_disable(mgp->dev);
+ netif_carrier_off(dev);
+ netif_stop_queue(dev);
+ old_down_cnt = mgp->down_cnt;
+ mb();
+ status = myri10ge_send_cmd(mgp, MYRI10GE_MCP_CMD_ETHERNET_DOWN, &cmd);
+ if (status) {
+ printk(KERN_ERR "myri10ge: %s: Couldn't bring down link\n",
+ dev->name);
+ }
+ wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt, HZ);
+ if (old_down_cnt == mgp->down_cnt) {
+ printk(KERN_ERR "myri10ge: %s never got down irq\n", dev->name);
+ }
+ netif_tx_disable(dev);
+
+ for (i = 0; i <= mgp->rx_big.mask; i++) {
+ if (mgp->rx_big.info[i].skb != NULL)
+ dev_kfree_skb_any(mgp->rx_big.info[i].skb);
+ if (pci_unmap_len(&mgp->rx_big.info[i], len)) {
+ pci_unmap_single(mgp->pdev,
+ pci_unmap_addr(&mgp->rx_big.info[i],
+ bus),
+ pci_unmap_len(&mgp->rx_big.info[i],
+ len),
+ PCI_DMA_FROMDEVICE);
+ }
+ }
+
+ for (i = 0; i <= mgp->rx_small.mask; i++) {
+ if (mgp->rx_small.info[i].skb != NULL)
+ dev_kfree_skb_any(mgp->rx_small.info[i].skb);
+ if (pci_unmap_len(&mgp->rx_small.info[i], len)) {
+ pci_unmap_single(mgp->pdev,
+ pci_unmap_addr(&mgp->rx_small.info[i],
+ bus),
+ pci_unmap_len(&mgp->rx_small.info[i],
+ len),
+ PCI_DMA_FROMDEVICE);
+ }
+ }
+
+ tx = &mgp->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 = pci_unmap_len(&tx->info[idx], len);
+ pci_unmap_len_set(&tx->info[idx], len, 0);
+ if (skb) {
+ mgp->stats.tx_dropped++;
+ dev_kfree_skb_any(skb);
+ if (len)
+ pci_unmap_single(mgp->pdev,
+ pci_unmap_addr(&tx->info[idx],
+ bus), len,
+ PCI_DMA_TODEVICE);
+ } else {
+ if (len)
+ pci_unmap_page(mgp->pdev,
+ pci_unmap_addr(&tx->info[idx],
+ bus), len,
+ PCI_DMA_TODEVICE);
+ }
+ }
+ kfree(mgp->rx_big.info);
+
+ kfree(mgp->rx_small.info);
+
+ kfree(mgp->tx.info);
+
+ kfree(mgp->rx_big.shadow);
+
+ kfree(mgp->rx_small.shadow);
+
+ kfree(mgp->tx.req_bytes);
+ mgp->tx.req_bytes = NULL;
+ mgp->tx.req_list = NULL;
+ 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;
+ u32 __iomem *dst_ints;
+ u32 *src_ints;
+ 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;
+ src_ints = (u32 *) src;
+ src_ints += 3;
+ dst_ints = (u32 __iomem *) dst;
+ dst_ints += 3;
+ *(u32 __force *) dst_ints = *src_ints;
+ tx->req += cnt;
+ mb();
+}
+
+static inline void
+myri10ge_submit_req_wc(struct myri10ge_tx_buf *tx,
+ struct mcp_kreq_ether_send *src, int cnt)
+{
+ tx->req += cnt;
+ mb();
+ while (cnt >= 4) {
+ myri10ge_pio_copy(tx->wc_fifo, src, 64);
+ mb();
+ src += 4;
+ cnt -= 4;
+ }
+ if (cnt > 0) {
+ /* pad it to 64 bytes. The src is 64 bytes bigger than it
+ * needs to be so that we don't overrun it */
+ myri10ge_pio_copy(tx->wc_fifo + (cnt << 18), src, 64);
+ mb();
+ }
+}
+
+/*
+ * Transmit a packet. We need to split the packet so that a single
+ * segment does not cross myri10ge->tx.boundary, so this makes segment
+ * counting tricky. So rather than try to count segments up front, we
+ * just give up if there are too few segments to hold a reasonably
+ * fragmented packet currently available. If we run
+ * out of segments while preparing a packet for DMA, we just linearize
+ * it and try again.
+ */
+
+static int myri10ge_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct myri10ge_priv *mgp = netdev_priv(dev);
+ struct mcp_kreq_ether_send *req;
+ struct myri10ge_tx_buf *tx = &mgp->tx;
+ struct skb_frag_struct *frag;
+ dma_addr_t bus;
+ u32 low, high_swapped;
+ unsigned int len;
+ int idx, last_idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
+ u16 pseudo_hdr_offset, cksum_offset;
+ int cum_len, seglen, boundary, rdma_count;
+ u8 flags, odd_flag;
+
+ again:
+ req = tx->req_list;
+ avail = tx->mask - 1 - (tx->req - tx->done);
+
+ mss = 0;
+ max_segments = MYRI10GE_MCP_ETHER_MAX_SEND_DESC;
+
+#ifdef NETIF_F_TSO
+ if (skb->len > (dev->mtu + ETH_HLEN)) {
+ mss = skb_shinfo(skb)->tso_size;
+ if (mss != 0)
+ max_segments = MYRI10GE_MCP_ETHER_MAX_SEND_DESC_TSO;
+ }
+#endif /*NETIF_F_TSO */
+
+ if ((unlikely(avail < max_segments))) {
+ /* we are out of transmit resources */
+ mgp->stop_queue++;
+ netif_stop_queue(dev);
+ return 1;
+ }
+
+ /* Setup checksum offloading, if needed */
+ cksum_offset = 0;
+ pseudo_hdr_offset = 0;
+ odd_flag = 0;
+ flags = (MYRI10GE_MCP_ETHER_FLAGS_NO_TSO |
+ MYRI10GE_MCP_ETHER_FLAGS_FIRST);
+ if (likely(skb->ip_summed == CHECKSUM_HW)) {
+ cksum_offset = (skb->h.raw - skb->data);
+ pseudo_hdr_offset = (skb->h.raw + skb->csum) - skb->data;
+ /* If the headers are excessively large, then we must
+ * fall back to a software checksum */
+ if (unlikely(cksum_offset > 255 || pseudo_hdr_offset > 127)) {
+ if (skb_checksum_help(skb, 0))
+ goto drop;
+ cksum_offset = 0;
+ pseudo_hdr_offset = 0;
+ } else {
+ pseudo_hdr_offset = htons(pseudo_hdr_offset);
+ odd_flag = MYRI10GE_MCP_ETHER_FLAGS_ALIGN_ODD;
+ flags |= MYRI10GE_MCP_ETHER_FLAGS_CKSUM;
+ }
+ }
+
+ cum_len = 0;
+
+#ifdef NETIF_F_TSO
+ if (mss) { /* TSO */
+ /* this removes any CKSUM flag from before */
+ flags = (MYRI10GE_MCP_ETHER_FLAGS_TSO_HDR |
+ MYRI10GE_MCP_ETHER_FLAGS_FIRST);
+
+ /* negative cum_len signifies to the
+ * send loop that we are still in the
+ * header portion of the TSO packet.
+ * TSO header must be at most 134 bytes long */
+ cum_len = -((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
+
+ /* for TSO, pseudo_hdr_offset holds mss.
+ * The firmware figures out where to put
+ * the checksum by parsing the header. */
+ pseudo_hdr_offset = htons(mss);
+ } else
+#endif /*NETIF_F_TSO */
+ /* Mark small packets, and pad out tiny packets */
+ if (skb->len <= MYRI10GE_MCP_ETHER_SEND_SMALL_SIZE) {
+ flags |= MYRI10GE_MCP_ETHER_FLAGS_SMALL;
+
+ /* pad frames to at least ETH_ZLEN bytes */
+ if (unlikely(skb->len < ETH_ZLEN)) {
+ skb = skb_padto(skb, ETH_ZLEN);
+ if (skb == NULL) {
+ /* The packet is gone, so we must
+ * return 0 */
+ mgp->stats.tx_dropped += 1;
+ return 0;
+ }
+ /* adjust the len to account for the zero pad
+ * so that the nic can know how long it is */
+ skb->len = ETH_ZLEN;
+ }
+ }
+
+ /* map the skb for DMA */
+ len = skb->len - skb->data_len;
+ idx = tx->req & tx->mask;
+ tx->info[idx].skb = skb;
+ bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
+ pci_unmap_addr_set(&tx->info[idx], bus, bus);
+ pci_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 + tx->boundary) & ~(tx->boundary - 1);
+ seglen = boundary - low;
+ if (seglen > len)
+ seglen = len;
+ flags_next = flags & ~MYRI10GE_MCP_ETHER_FLAGS_FIRST;
+ cum_len_next = cum_len + seglen;
+#ifdef NETIF_F_TSO
+ 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 *
+ MYRI10GE_MCP_ETHER_FLAGS_TSO_CHOP;
+ flags_next |= next_is_first *
+ MYRI10GE_MCP_ETHER_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 <=
+ MYRI10GE_MCP_ETHER_SEND_SMALL_SIZE);
+ flags_next =
+ MYRI10GE_MCP_ETHER_FLAGS_TSO_PLD |
+ MYRI10GE_MCP_ETHER_FLAGS_FIRST |
+ (small *
+ MYRI10GE_MCP_ETHER_FLAGS_SMALL);
+ }
+ }
+#endif /* NETIF_F_TSO */
+ req->addr_high = high_swapped;
+ req->addr_low = htonl(low);
+ req->pseudo_hdr_offset = 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 (unlikely(cksum_offset > seglen))
+ cksum_offset -= seglen;
+ else
+ cksum_offset = 0;
+ }
+ if (frag_idx == frag_cnt)
+ break;
+
+ /* map next fragment for DMA */
+ idx = (count + tx->req) & tx->mask;
+ frag = &skb_shinfo(skb)->frags[frag_idx];
+ frag_idx++;
+ len = frag->size;
+ bus = pci_map_page(mgp->pdev, frag->page, frag->page_offset,
+ len, PCI_DMA_TODEVICE);
+ pci_unmap_addr_set(&tx->info[idx], bus, bus);
+ pci_unmap_len_set(&tx->info[idx], len, len);
+ }
+
+ (req - rdma_count)->rdma_count = rdma_count;
+#ifdef NETIF_F_TSO
+ if (mss) {
+ do {
+ req--;
+ req->flags |= MYRI10GE_MCP_ETHER_FLAGS_TSO_LAST;
+ } while (!(req->flags & (MYRI10GE_MCP_ETHER_FLAGS_TSO_CHOP |
+ MYRI10GE_MCP_ETHER_FLAGS_FIRST)));
+ }
+#endif
+ idx = ((count - 1) + tx->req) & tx->mask;
+ tx->info[idx].last = 1;
+ if (tx->wc_fifo == NULL)
+ myri10ge_submit_req(tx, tx->req_list, count);
+ else
+ myri10ge_submit_req_wc(tx, tx->req_list, count);
+ tx->pkt_start++;
+ if ((avail - count) < MYRI10GE_MCP_ETHER_MAX_SEND_DESC) {
+ mgp->stop_queue++;
+ netif_stop_queue(dev);
+ }
+ dev->trans_start = jiffies;
+ return 0;
+
+ abort_linearize:
+ /* Free any DMA resources we've alloced and clear out the skb
+ * slot so as to not trip up assertions, and to avoid a
+ * double-free if linearizing fails */
+
+ last_idx = (idx + 1) & tx->mask;
+ idx = tx->req & tx->mask;
+ tx->info[idx].skb = NULL;
+ do {
+ len = pci_unmap_len(&tx->info[idx], len);
+ if (len) {
+ if (tx->info[idx].skb != NULL) {
+ pci_unmap_single(mgp->pdev,
+ pci_unmap_addr(&tx->info[idx],
+ bus), len,
+ PCI_DMA_TODEVICE);
+ } else {
+ pci_unmap_page(mgp->pdev,
+ pci_unmap_addr(&tx->info[idx],
+ bus), len,
+ PCI_DMA_TODEVICE);
+ }
+ pci_unmap_len_set(&tx->info[idx], len, 0);
+ tx->info[idx].skb = NULL;
+ }
+ idx = (idx + 1) & tx->mask;
+ } while (idx != last_idx);
+ if (skb_shinfo(skb)->tso_size) {
+ printk(KERN_ERR
+ "myri10ge: %s: TSO but wanted to linearize?!?!?\n",
+ mgp->dev->name);
+ goto drop;
+ }
+
+ if (skb_linearize(skb, GFP_ATOMIC)) {
+ goto drop;
+ }
+ mgp->tx_linearized++;
+ goto again;
+
+ drop:
+ dev_kfree_skb_any(skb);
+ mgp->stats.tx_dropped += 1;
+ return 0;
+
+}
+
+static struct net_device_stats *myri10ge_get_stats(struct net_device *dev)
+{
+ struct myri10ge_priv *mgp = netdev_priv(dev);
+ return &mgp->stats;
+}
+
+static void myri10ge_set_multicast_list(struct net_device *dev)
+{
+ myri10ge_change_promisc(netdev_priv(dev), dev->flags & IFF_PROMISC);
+}
+
+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) {
+ printk(KERN_ERR
+ "myri10ge: %s: changing mac address failed with %d\n",
+ dev->name, status);
+ return status;
+ }
+
+ /* change the dev structure */
+ memcpy(dev->dev_addr, sa->sa_data, 6);
+ return 0;
+}
+
+static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
+{
+ struct myri10ge_priv *mgp = netdev_priv(dev);
+ int error = 0;
+
+ if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) {
+ printk(KERN_ERR "myri10ge: %s: new mtu (%d) is not valid\n",
+ dev->name, new_mtu);
+ return -EINVAL;
+ }
+ printk("%s: changing mtu from %d to %d\n",
+ dev->name, 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.
+ */
+
+#define PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_PCIE 0x005d
+
+static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
+{
+ struct pci_dev *bridge = mgp->pdev->bus->self;
+ struct device *dev = &mgp->pdev->dev;
+ unsigned cap;
+ unsigned err_cap;
+ u16 val;
+ u8 ext_type;
+ int ret;
+
+ if (!myri10ge_ecrc_enable || !bridge)
+ return;
+
+ /* check that the bridge is a root port */
+ cap = pci_find_capability(bridge, PCI_CAP_ID_EXP);
+ pci_read_config_word(bridge, cap + PCI_CAP_FLAGS, &val);
+ ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
+ if (ext_type != PCI_EXP_TYPE_ROOT_PORT) {
+ if (myri10ge_ecrc_enable > 1) {
+ struct pci_dev *old_bridge = bridge;
+
+ /* Walk the hierarchy up to the root port
+ * where ECRC has to be enabled */
+ do {
+ bridge = bridge->bus->self;
+ if (!bridge) {
+ dev_err(dev,
+ "Failed to find root port"
+ " to force ECRC\n");
+ return;
+ }
+ cap =
+ pci_find_capability(bridge, PCI_CAP_ID_EXP);
+ pci_read_config_word(bridge,
+ cap + PCI_CAP_FLAGS, &val);
+ ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
+ } while (ext_type != PCI_EXP_TYPE_ROOT_PORT);
+
+ dev_info(dev,
+ "Forcing ECRC on non-root port %s"
+ " (enabling on root port %s)\n",
+ pci_name(old_bridge), pci_name(bridge));
+ } else {
+ dev_err(dev,
+ "Not enabling ECRC on non-root port %s\n",
+ pci_name(bridge));
+ return;
+ }
+ }
+
+ cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
+ /* nvidia ext cap is not always linked in ext cap chain */
+ if (!cap
+ && bridge->vendor == PCI_VENDOR_ID_NVIDIA
+ && bridge->device == PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_PCIE)
+ cap = 0x160;
+
+ 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));
+ mgp->tx.boundary = 4096;
+ mgp->fw_name = myri10ge_fw_aligned;
+}
+
+/*
+ * 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_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_eth_z8e.dat)
+ * firmware image, and set tx.boundary to 4KB.
+ */
+
+#define PCI_DEVICE_ID_SERVERWORKS_HT2000_PCIE 0x0132
+
+static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
+{
+ struct pci_dev *bridge = mgp->pdev->bus->self;
+
+ mgp->tx.boundary = 2048;
+ mgp->fw_name = myri10ge_fw_unaligned;
+
+ if (myri10ge_force_firmware == 0) {
+ myri10ge_enable_ecrc(mgp);
+
+ /* Check to see if the upstream bridge is known to
+ * provide aligned completions */
+ if (bridge
+ /* ServerWorks HT2000/HT1000 */
+ && bridge->vendor == PCI_VENDOR_ID_SERVERWORKS
+ && bridge->device ==
+ PCI_DEVICE_ID_SERVERWORKS_HT2000_PCIE) {
+ dev_info(&mgp->pdev->dev,
+ "Assuming aligned completions (0x%x:0x%x)\n",
+ bridge->vendor, bridge->device);
+ mgp->tx.boundary = 4096;
+ mgp->fw_name = myri10ge_fw_aligned;
+ }
+ } else {
+ if (myri10ge_force_firmware == 1) {
+ dev_info(&mgp->pdev->dev,
+ "Assuming aligned completions (forced)\n");
+ mgp->tx.boundary = 4096;
+ mgp->fw_name = myri10ge_fw_aligned;
+ } else {
+ dev_info(&mgp->pdev->dev,
+ "Assuming unaligned completions (forced)\n");
+ mgp->tx.boundary = 2048;
+ mgp->fw_name = myri10ge_fw_unaligned;
+ }
+ }
+ if (myri10ge_fw_name != NULL) {
+ dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
+ myri10ge_fw_name);
+ mgp->fw_name = myri10ge_fw_name;
+ }
+}
+
+static void myri10ge_save_state(struct myri10ge_priv *mgp)
+{
+ struct pci_dev *pdev = mgp->pdev;
+ int cap;
+
+ pci_save_state(pdev);
+ /* now save PCIe and MSI state that Linux will not
+ * save for us */
+ cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
+ pci_read_config_dword(pdev, cap + PCI_EXP_DEVCTL, &mgp->devctl);
+ cap = pci_find_capability(pdev, PCI_CAP_ID_MSI);
+ pci_read_config_word(pdev, cap + PCI_MSI_FLAGS, &mgp->msi_flags);
+}
+
+static void myri10ge_restore_state(struct myri10ge_priv *mgp)
+{
+ struct pci_dev *pdev = mgp->pdev;
+ int cap;
+
+ /* restore PCIe and MSI state that linux will not */
+ cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
+ pci_write_config_dword(pdev, cap + PCI_CAP_ID_EXP, mgp->devctl);
+ cap = pci_find_capability(pdev, PCI_CAP_ID_MSI);
+ pci_write_config_word(pdev, cap + PCI_MSI_FLAGS, mgp->msi_flags);
+
+ pci_restore_state(pdev);
+}
+
+#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)) {
+ printk("myri10ge: closing %s\n", netdev->name);
+ rtnl_lock();
+ myri10ge_close(netdev);
+ rtnl_unlock();
+ }
+ myri10ge_dummy_rdma(mgp, 0);
+ free_irq(pdev->irq, mgp);
+ myri10ge_save_state(mgp);
+ pci_disable_device(pdev);
+ pci_set_power_state(pdev, pci_choose_state(pdev, state));
+ return 0;
+}
+
+static int myri10ge_resume(struct pci_dev *pdev)
+{
+ struct myri10ge_priv *mgp;
+ struct net_device *netdev;
+ int status;
+ u16 vendor;
+
+ mgp = pci_get_drvdata(pdev);
+ if (mgp == NULL)
+ return -EINVAL;
+ netdev = mgp->dev;
+ pci_set_power_state(pdev, 0); /* zeros conf space as a side effect */
+ udelay(5000); /* give card time to respond */
+ pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
+ if (vendor == 0xffff) {
+ printk(KERN_ERR "myri10ge: %s: device disappeared!\n",
+ mgp->dev->name);
+ return -EIO;
+ }
+ myri10ge_restore_state(mgp);
+ pci_enable_device(pdev);
+ pci_set_master(pdev);
+
+ status = request_irq(pdev->irq, myri10ge_intr, SA_SHIRQ,
+ netdev->name, mgp);
+ if (status != 0) {
+ dev_err(&pdev->dev, "failed to allocate IRQ\n");
+ goto abort_with_msi;
+ }
+
+ myri10ge_reset(mgp);
+ myri10ge_dummy_rdma(mgp, mgp->tx.boundary != 4096);
+
+ /* Save configuration space to be restored if the
+ * nic resets due to a parity error */
+ myri10ge_save_state(mgp);
+
+ if (netif_running(netdev)) {
+ rtnl_lock();
+ myri10ge_open(netdev);
+ rtnl_unlock();
+ }
+ netif_device_attach(netdev);
+
+ return 0;
+
+ abort_with_msi:
+ return -EIO;
+
+}
+
+#endif /* CONFIG_PM */
+
+static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
+{
+ struct pci_dev *pdev = mgp->pdev;
+ int vs = mgp->vendor_specific_offset;
+ u32 reboot;
+
+ /*enter read32 mode */
+ pci_write_config_byte(pdev, vs + 0x10, 0x3);
+
+ /*read REBOOT_STATUS (0xfffffff0) */
+ pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
+ pci_read_config_dword(pdev, vs + 0x14, &reboot);
+ return reboot;
+}
+
+/*
+ * This watchdog is used to check whether the board has suffered
+ * from a parity error and needs to be recovered.
+ */
+static void myri10ge_watchdog(void *arg)
+{
+ struct myri10ge_priv *mgp = arg;
+ u32 reboot;
+ int status;
+ u16 cmd, vendor;
+
+ mgp->watchdog_resets++;
+ pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
+ 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);
+ printk(KERN_ERR
+ "myri10ge: %s: NIC rebooted (0x%x), resetting\n",
+ mgp->dev->name, reboot);
+ /*
+ * 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.
+ */
+ myri10ge_restore_state(mgp);
+ } 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) {
+ printk(KERN_ERR
+ "myri10ge: %s: device disappeared!\n",
+ mgp->dev->name);
+ return;
+ }
+ }
+ /* Perhaps it is a software error. Try to reset */
+
+ printk(KERN_ERR "myri10ge: %s: device timeout, resetting\n",
+ mgp->dev->name);
+ printk("myri10ge: %s: %d %d %d %d %d\n", mgp->dev->name,
+ mgp->tx.req, mgp->tx.done, mgp->tx.pkt_start,
+ mgp->tx.pkt_done,
+ (int)ntohl(mgp->fw_stats->send_done_count));
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(HZ * 2);
+ set_current_state(TASK_RUNNING);
+ printk("myri10ge: %s: %d %d %d %d %d\n", mgp->dev->name,
+ mgp->tx.req, mgp->tx.done, mgp->tx.pkt_start,
+ mgp->tx.pkt_done,
+ (int)ntohl(mgp->fw_stats->send_done_count));
+ }
+ rtnl_lock();
+ myri10ge_close(mgp->dev);
+ status = myri10ge_load_firmware(mgp);
+ if (status != 0) {
+ printk(KERN_ERR "myri10ge: %s: failed to load firmware\n",
+ mgp->dev->name);
+ } else {
+ myri10ge_open(mgp->dev);
+ }
+ rtnl_unlock();
+}
+
+/*
+ * We use our own timer routine rather than relying upon
+ * netdev->tx_timeout because we have a very large hardware transmit
+ * queue. Due to the large queue, the netdev->tx_timeout function
+ * cannot detect a NIC with a parity error in a timely fashion if the
+ * NIC is lightly loaded.
+ */
+static void myri10ge_watchdog_timer(unsigned long arg)
+{
+ struct myri10ge_priv *mgp;
+
+ mgp = (struct myri10ge_priv *)arg;
+ if (mgp->tx.req != mgp->tx.done &&
+ mgp->tx.done == mgp->watchdog_tx_done) {
+ /* nic seems like it might be stuck.. */
+ schedule_work(&mgp->watchdog_work);
+ } else {
+ /* rearm timer */
+ mod_timer(&mgp->watchdog_timer,
+ jiffies + myri10ge_watchdog_timeout * HZ);
+ }
+ mgp->watchdog_tx_done = mgp->tx.done;
+}
+
+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;
+ size_t bytes;
+ int i;
+ int status = -ENXIO;
+ int cap;
+ int dac_enabled;
+ u16 val;
+
+ netdev = alloc_etherdev(sizeof(*mgp));
+ if (netdev == NULL) {
+ dev_err(dev, "Could not allocate ethernet device\n");
+ return -ENOMEM;
+ }
+
+ mgp = netdev_priv(netdev);
+ memset(mgp, 0, sizeof(*mgp));
+ mgp->dev = netdev;
+ mgp->pdev = pdev;
+ mgp->csum_flag = MYRI10GE_MCP_ETHER_FLAGS_CKSUM;
+ mgp->pause = myri10ge_flow_control;
+ mgp->intr_coal_delay = myri10ge_intr_coal_delay;
+ 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;
+ }
+ myri10ge_select_firmware(mgp);
+
+ /* 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 */
+ cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
+ if (cap < 64) {
+ dev_err(&pdev->dev, "Bad PCI_CAP_ID_EXP location %d\n", cap);
+ goto abort_with_netdev;
+ }
+ status = pci_read_config_word(pdev, cap + PCI_EXP_DEVCTL, &val);
+ if (status != 0) {
+ dev_err(&pdev->dev, "Error %d reading PCI_EXP_DEVCTL\n",
+ status);
+ goto abort_with_netdev;
+ }
+ val = (val & ~PCI_EXP_DEVCTL_READRQ) | (5 << 12);
+ status = pci_write_config_word(pdev, cap + PCI_EXP_DEVCTL, val);
+ if (status != 0) {
+ dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
+ status);
+ goto abort_with_netdev;
+ }
+
+ pci_set_master(pdev);
+ dac_enabled = 1;
+ status = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
+ if (status != 0) {
+ dac_enabled = 0;
+ dev_err(&pdev->dev,
+ "64-bit pci address mask was refused, trying 32-bit");
+ status = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
+ }
+ if (status != 0) {
+ dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
+ goto abort_with_netdev;
+ }
+ mgp->cmd = pci_alloc_consistent(pdev, sizeof(*mgp->cmd), &mgp->cmd_bus);
+ if (mgp->cmd == NULL) {
+ goto abort_with_netdev;
+ }
+
+ mgp->fw_stats = pci_alloc_consistent(pdev, sizeof(*mgp->fw_stats),
+ &mgp->fw_stats_bus);
+ if (mgp->fw_stats == NULL) {
+ goto abort_with_cmd;
+ }
+
+ mgp->board_span = pci_resource_len(pdev, 0);
+ mgp->iomem_base = pci_resource_start(pdev, 0);
+ mgp->mtrr = -1;
+#ifdef CONFIG_MTRR
+ mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
+ MTRR_TYPE_WRCOMB, 1);
+#endif
+ /* Hack. need to get rid of these magic numbers */
+ mgp->sram_size =
+ 2 * 1024 * 1024 - (2 * (48 * 1024) + (32 * 1024)) - 0x100;
+ if (mgp->sram_size > mgp->board_span) {
+ dev_err(&pdev->dev, "board span %ld bytes too small\n",
+ mgp->board_span);
+ goto abort_with_wc;
+ }
+ mgp->sram = ioremap(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_wc;
+ }
+ memcpy_fromio(mgp->eeprom_strings,
+ mgp->sram + mgp->sram_size - MYRI10GE_EEPROM_STRINGS_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];
+ }
+ /* allocate rx done ring */
+ bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
+ mgp->rx_done.entry =
+ pci_alloc_consistent(pdev, bytes, &mgp->rx_done.bus);
+ if (mgp->rx_done.entry == NULL)
+ goto abort_with_ioremap;
+ memset(mgp->rx_done.entry, 0, bytes);
+
+ status = myri10ge_load_firmware(mgp);
+ if (status != 0) {
+ dev_err(&pdev->dev, "failed to load firmware\n");
+ goto abort_with_rx_done;
+ }
+
+ status = myri10ge_reset(mgp);
+ if (status != 0) {
+ dev_err(&pdev->dev, "failed reset\n");
+ goto abort_with_firmware;
+ }
+
+ if (myri10ge_msi) {
+ 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;
+ }
+ }
+
+ status = request_irq(pdev->irq, myri10ge_intr, SA_SHIRQ,
+ netdev->name, mgp);
+ if (status != 0) {
+ dev_err(&pdev->dev, "failed to allocate IRQ\n");
+ goto abort_with_firmware;
+ }
+
+ pci_set_drvdata(pdev, mgp);
+ if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU)
+ myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
+ if ((myri10ge_initial_mtu + ETH_HLEN) < 68)
+ myri10ge_initial_mtu = 68;
+ netdev->mtu = myri10ge_initial_mtu;
+ netdev->open = myri10ge_open;
+ netdev->stop = myri10ge_close;
+ netdev->hard_start_xmit = myri10ge_xmit;
+ netdev->get_stats = myri10ge_get_stats;
+ netdev->base_addr = mgp->iomem_base;
+ netdev->irq = pdev->irq;
+ netdev->change_mtu = myri10ge_change_mtu;
+ netdev->set_multicast_list = myri10ge_set_multicast_list;
+ netdev->set_mac_address = myri10ge_set_mac_address;
+ netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
+ if (dac_enabled)
+ netdev->features |= NETIF_F_HIGHDMA;
+ netdev->poll = myri10ge_poll;
+ netdev->weight = myri10ge_napi_weight;
+
+ /* Save configuration space to be restored if the
+ * nic resets due to a parity error */
+ myri10ge_save_state(mgp);
+ /* Restore state immediately since pci_save_msi_state disables MSI */
+ myri10ge_restore_state(mgp);
+
+ /* Setup the watchdog timer */
+ setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
+ (unsigned long)mgp);
+
+ SET_ETHTOOL_OPS(netdev, &myri10ge_ethtool_ops);
+ INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog, mgp);
+ status = register_netdev(netdev);
+ if (status != 0) {
+ dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
+ goto abort_with_irq;
+ }
+
+ printk("myri10ge: %s: %s IRQ %d, tx bndry %d, fw %s, WC %s\n",
+ netdev->name, (mgp->msi_enabled ? "MSI" : "xPIC"),
+ pdev->irq, mgp->tx.boundary, mgp->fw_name,
+ (mgp->mtrr >= 0 ? "Enabled" : "Disabled"));
+
+ return 0;
+
+ abort_with_irq:
+ free_irq(pdev->irq, mgp);
+ if (mgp->msi_enabled)
+ pci_disable_msi(pdev);
+
+ abort_with_firmware:
+ myri10ge_dummy_rdma(mgp, 0);
+
+ abort_with_rx_done:
+ bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
+ pci_free_consistent(pdev, bytes, mgp->rx_done.entry, mgp->rx_done.bus);
+
+ abort_with_ioremap:
+ iounmap((void __iomem *)mgp->sram);
+
+ abort_with_wc:
+#ifdef CONFIG_MTRR
+ if (mgp->mtrr >= 0)
+ mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
+#endif
+ pci_free_consistent(pdev, sizeof(*mgp->fw_stats),
+ mgp->fw_stats, mgp->fw_stats_bus);
+
+ abort_with_cmd:
+ pci_free_consistent(pdev, sizeof(*mgp->cmd), mgp->cmd, mgp->cmd_bus);
+
+ abort_with_netdev:
+
+ 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;
+ size_t bytes;
+
+ mgp = pci_get_drvdata(pdev);
+ if (mgp == NULL)
+ return;
+
+ flush_scheduled_work();
+ netdev = mgp->dev;
+ unregister_netdev(netdev);
+ free_irq(pdev->irq, mgp);
+ if (mgp->msi_enabled)
+ pci_disable_msi(pdev);
+
+ myri10ge_dummy_rdma(mgp, 0);
+
+ bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
+ pci_free_consistent(pdev, bytes, mgp->rx_done.entry, mgp->rx_done.bus);
+
+ iounmap((void __iomem *)mgp->sram);
+
+#ifdef CONFIG_MTRR
+ if (mgp->mtrr >= 0)
+ mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
+#endif
+ pci_free_consistent(pdev, sizeof(*mgp->fw_stats),
+ mgp->fw_stats, mgp->fw_stats_bus);
+
+ pci_free_consistent(pdev, sizeof(*mgp->cmd), mgp->cmd, mgp->cmd_bus);
+
+ free_netdev(netdev);
+ pci_set_drvdata(pdev, NULL);
+}
+
+#define MYRI10GE_PCI_VENDOR_MYRICOM 0x14c1
+#define MYRI10GE_PCI_DEVICE_Z8E 0x0008
+static struct pci_device_id myri10ge_pci_tbl[] = {
+ {PCI_DEVICE(MYRI10GE_PCI_VENDOR_MYRICOM, MYRI10GE_PCI_DEVICE_Z8E)},
+ {0},
+};
+
+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
+};
+
+static __init int myri10ge_init_module(void)
+{
+ printk("%s: Version %s\n", myri10ge_driver.name, MYRI10GE_VERSION_STR);
+ return pci_register_driver(&myri10ge_driver);
+}
+
+static __exit void myri10ge_cleanup_module(void)
+{
+ pci_unregister_driver(&myri10ge_driver);
+}
+
+module_init(myri10ge_init_module);
+module_exit(myri10ge_cleanup_module);