Brice Goglin
2006-05-10T21:40:32Z

[PATCH 4/6] myri10ge - First half of the driver

The first half of the myri10ge driver core.

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

myri10ge.c | 1483 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 1483 insertions(+)

--- /dev/null 2006-05-09 19:43:19.324446250 +0200
+++ linux/drivers/net/myri10ge/myri10ge.c 2006-05-09 23:00:55.000000000 +0200
@@ -0,0 +1,1483 @@
+/*************************************************************************
+ * 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)
+};
+
+typedef struct {
+ uint32_t data0;
+ uint32_t data1;
+ uint32_t data2;
+} myri10ge_cmd_t;
+
+typedef struct {
+ mcp_kreq_ether_recv_t __iomem *lanai; /* lanai ptr for recv ring */
+ volatile uint8_t __iomem *wc_fifo; /* w/c rx dma addr fifo address */
+ mcp_kreq_ether_recv_t *shadow; /* host shadow of recv ring */
+ struct myri10ge_rx_buffer_state *info;
+ int cnt;
+ int alloc_fail;
+ int mask; /* number of rx slots -1 */
+} myri10ge_rx_buf_t;
+
+typedef struct {
+ mcp_kreq_ether_send_t __iomem *lanai; /* lanai ptr for sendq */
+ volatile uint8_t __iomem *wc_fifo; /* w/c send fifo address */
+ mcp_kreq_ether_send_t *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 */
+} myri10ge_tx_buf_t;
+
+typedef struct {
+ mcp_slot_t *entry;
+ dma_addr_t bus;
+ int cnt;
+ int idx;
+} myri10ge_rx_done_t;
+
+struct myri10ge_priv {
+ int running; /* running? */
+ int csum_flag; /* rx_csums? */
+ myri10ge_tx_buf_t tx; /* transmit ring */
+ myri10ge_rx_buf_t rx_small;
+ myri10ge_rx_buf_t rx_big;
+ myri10ge_rx_done_t rx_done;
+ int small_bytes;
+ struct net_device *dev;
+ struct net_device_stats stats;
+ volatile uint8_t __iomem *sram;
+ int sram_size;
+ unsigned long board_span;
+ unsigned long iomem_base;
+ volatile uint32_t __iomem *irq_claim;
+ volatile uint32_t __iomem *irq_deassert;
+ char *mac_addr_string;
+ mcp_cmd_response_t *cmd;
+ dma_addr_t cmd_bus;
+ mcp_irq_data_t *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 uint32_t __iomem *intr_coal_delay_ptr;
+ int mtrr;
+ spinlock_t cmd_lock;
+ int wake_queue;
+ int stop_queue;
+ int down_cnt;
+ 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];
+ uint8_t mac_addr[6]; /* eeprom mac address */
+ unsigned long serial_number;
+ int vendor_specific_offset;
+ uint32_t devctl;
+ uint32_t msi_addr_low;
+ uint32_t msi_addr_high;
+ uint16_t msi_flags;
+ uint16_t msi_data_32;
+ uint16_t msi_data_64;
+ uint32_t pm_state[16];
+ uint32_t read_dma;
+ uint32_t write_dma;
+ uint32_t read_write_dma;
+};
+
+
+static char *myri10ge_fw_name = NULL;
+static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
+#if defined(CONFIG_X86) || defined(CONFIG_X86_64)
+static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
+static int myri10ge_ecrc_enable = 1;
+#endif
+static int myri10ge_max_intr_slots = 1024;
+static int myri10ge_small_bytes = -1; /* -1 == auto */
+#ifdef CONFIG_PCI_MSI
+static int myri10ge_msi = -1; /* 0: off, 1:on, otherwise auto */
+#endif
+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 = 1;
+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_param(myri10ge_max_intr_slots, int, S_IRUGO);
+module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
+#ifdef CONFIG_PCI_MSI
+module_param(myri10ge_msi, int, S_IRUGO);
+#endif
+module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
+#if defined(CONFIG_X86) || defined(CONFIG_X86_64)
+module_param(myri10ge_ecrc_enable, int, S_IRUGO);
+#endif
+module_param(myri10ge_flow_control, int, S_IRUGO);
+module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
+module_param(myri10ge_force_firmware, int, S_IRUGO);
+module_param(myri10ge_skb_cross_4k, int, S_IRUGO | S_IWUSR);
+module_param(myri10ge_initial_mtu, int, S_IRUGO);
+module_param(myri10ge_napi, int, S_IRUGO);
+module_param(myri10ge_napi_weight, int, S_IRUGO);
+module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
+module_param(myri10ge_max_irq_loops, int, S_IRUGO);
+
+#define MYRI10GE_FW_OFFSET 1024*1024
+#define MYRI10GE_HIGHPART_TO_U32(X) \
+(sizeof (X) == 8) ? ((uint32_t)((uint64_t)(X) >> 32)) : (0)
+#define MYRI10GE_LOWPART_TO_U32(X) ((uint32_t)(X))
+
+#define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
+
+int myri10ge_hyper_msi_cap_on(struct pci_dev *pdev)
+{
+ uint8_t cap_off;
+ int nbcap = 0;
+
+ cap_off = PCI_CAPABILITY_LIST - 1;
+ /* go through all caps looking for a hypertransport msi mapping */
+ while (pci_read_config_byte(pdev, cap_off + 1, &cap_off) == 0 &&
+ nbcap++ <= 256 / 4) {
+ uint32_t cap_hdr;
+ if (cap_off == 0 || cap_off == 0xff)
+ break;
+ cap_off &= 0xfc;
+ /* cf hypertransport spec, msi mapping section */
+ if (pci_read_config_dword(pdev, cap_off, &cap_hdr) == 0
+ && (cap_hdr & 0xff) == 8 /* hypertransport cap */
+ && (cap_hdr & 0xf8000000) == 0xa8000000 /* msi mapping */
+ && (cap_hdr & 0x10000) /* msi mapping cap enabled */) {
+ /* MSI present and enabled */
+ return 1;
+ }
+ }
+ return 0;
+}
+
+#ifdef CONFIG_PCI_MSI
+static int
+myri10ge_use_msi(struct pci_dev *pdev)
+{
+ if (myri10ge_msi == 1 || myri10ge_msi == 0)
+ return myri10ge_msi;
+
+ /* find root complex for our device */
+ while (pdev->bus && pdev->bus->self) {
+ pdev = pdev->bus->self;
+ }
+ /* go for it if chipset is intel, or has hypertransport msi cap */
+ if (pdev->vendor == PCI_VENDOR_ID_INTEL
+ || myri10ge_hyper_msi_cap_on(pdev))
+ return 1;
+
+ /* check if main chipset device has hypertransport msi cap */
+ pdev = pci_find_slot(pdev->bus->number, 0);
+ if (pdev && myri10ge_hyper_msi_cap_on(pdev))
+ return 1;
+
+ /* default off */
+ return 0;
+}
+#endif /* CONFIG_PCI_MSI */
+
+
+static int
+myri10ge_send_cmd(struct myri10ge_priv *mgp, uint32_t cmd,
+ myri10ge_cmd_t *data)
+{
+ mcp_cmd_t *buf;
+ char buf_bytes[sizeof(*buf) + 8];
+ volatile mcp_cmd_response_t *response = mgp->cmd;
+ volatile char __iomem *cmd_addr = mgp->sram + MYRI10GE_MCP_CMD_OFFSET;
+ uint32_t dma_low, dma_high;
+ int sleep_total = 0;
+
+ /* ensure buf is aligned to 8 bytes */
+ buf = (mcp_cmd_t *) ((unsigned long)(buf_bytes + 7) & ~7UL);
+
+ 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);
+ spin_lock(&mgp->cmd_lock);
+ response->result = 0xffffffff;
+ mb();
+ myri10ge_pio_copy((void __iomem *) cmd_addr, buf, sizeof (*buf));
+
+ /* wait up to 2 seconds */
+ for (sleep_total = 0; sleep_total < (2 * 1000); sleep_total += 10) {
+ mb();
+ if (response->result != 0xffffffff) {
+ if (response->result == 0) {
+ data->data0 = ntohl(response->data);
+ spin_unlock(&mgp->cmd_lock);
+ return 0;
+ } else {
+ dev_err(&mgp->pdev->dev,
+ "command %d failed, result = %d\n",
+ cmd, ntohl(response->result));
+ spin_unlock(&mgp->cmd_lock);
+ return -ENXIO;
+ }
+ }
+ udelay(1000 * 10);
+ }
+ spin_unlock(&mgp->cmd_lock);
+ dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
+ cmd, ntohl(response->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
+ */
+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 uint32_t *confirm;
+ volatile char __iomem *submit;
+ uint32_t buf[16];
+ uint32_t dma_low, dma_high;
+ int i;
+
+ /* clear confirmation addr */
+ confirm = (volatile uint32_t *) 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));
+ mb();
+ udelay(1000);
+ mb();
+ i = 0;
+ while (*confirm != 0xffffffff && i < 20) {
+ udelay(1000);
+ i++;
+ }
+ 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,
+ mcp_gen_header_t *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_MAJOR && minor == MYRI10GE_MCP_MINOR)) {
+ dev_err(dev, "Found firmware version %s\n",
+ mgp->fw_version);
+ dev_err(dev, "Driver needs %d.%d\n", MYRI10GE_MCP_MAJOR,
+ MYRI10GE_MCP_MINOR);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int
+myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, uint32_t *size)
+{
+ unsigned crc, reread_crc;
+ const struct firmware *fw;
+ struct device *dev = &mgp->pdev->dev;
+ mcp_gen_header_t *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(*(uint32_t *) (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 = (uint32_t)fw->size;
+
+abort_with_fw:
+ release_firmware(fw);
+
+abort_with_nothing:
+ return status;
+}
+
+static int
+myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
+{
+ mcp_gen_header_t *hdr;
+ struct device *dev = &mgp->pdev->dev;
+ size_t bytes, 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 */
+ bytes = sizeof (mcp_gen_header_t);
+ hdr = (mcp_gen_header_t *) 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 uint32_t *confirm;
+ volatile char __iomem *submit;
+ uint32_t buf[16];
+ uint32_t 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 uint32_t *) 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, uint8_t *addr)
+{
+ myri10ge_cmd_t 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)
+{
+ myri10ge_cmd_t cmd;
+ int status;
+
+ if (pause)
+ status = myri10ge_send_cmd(mgp, MYRI10GE_MCP_ENABLE_FLOW_CONTROL, &cmd);
+ else
+ status = myri10ge_send_cmd(mgp, MYRI10GE_MCP_DISABLE_FLOW_CONTROL, &cmd);
+
+ if (status) {
+ printk(KERN_ERR "myri10ge: %s: Failed to set flow control mode\n",
+ mgp->dev->name);
+ return -ENXIO;
+ }
+ mgp->pause = pause;
+ return 0;
+}
+
+static void
+myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc)
+{
+ myri10ge_cmd_t cmd;
+ int status;
+
+ if (promisc)
+ status = myri10ge_send_cmd(mgp, MYRI10GE_MCP_ENABLE_PROMISC, &cmd);
+ else
+ status = myri10ge_send_cmd(mgp, MYRI10GE_MCP_DISABLE_PROMISC, &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)
+{
+
+ myri10ge_cmd_t cmd;
+ int status;
+ size_t bytes;
+ uint32_t 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 = (uint32_t) 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 uint32_t *) (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 uint32_t *) (mgp->sram + cmd.data0);
+
+ }
+ status |= myri10ge_send_cmd
+ (mgp, MYRI10GE_MCP_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd);
+ mgp->intr_coal_delay_ptr = (__iomem uint32_t *) (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);
+ mgp->read_dma = ((cmd.data0>>16) * len * 2)/(cmd.data0 & 0xffff);
+
+ 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);
+ mgp->write_dma = ((cmd.data0>>16) * len * 2)/(cmd.data0 & 0xffff);
+
+ 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);
+ mgp->read_write_dma = ((cmd.data0>>16) * len * 2 * 2) /
+ (cmd.data0 & 0xffff);
+
+ 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(mcp_kreq_ether_recv_t __iomem *dst, mcp_kreq_ether_recv_t *src)
+{
+ uint32_t low;
+
+ low = src->addr_low;
+ src->addr_low = 0xffffffff;
+ myri10ge_pio_copy(dst, src, 8 * sizeof(*src));
+ mb();
+ src->addr_low = low;
+ *(uint32_t __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.
+ */
+
+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(myri10ge_rx_buf_t *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, uint16_t 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, myri10ge_rx_buf_t *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((uint16_t)csum);
+ skb->ip_summed = CHECKSUM_HW;
+ } else {
+ myri10ge_vlan_ip_csum(skb,
+ ntohs((uint16_t) csum));
+ }
+ }
+
+ if (myri10ge_napi)
+ netif_receive_skb(skb);
+ else
+ netif_rx(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;
+ myri10ge_tx_buf_t *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)
+{
+ myri10ge_rx_done_t *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;
+ uint16_t length;
+ uint16_t 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)
+{
+ mcp_irq_data_t *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;
+ }
+}
+
+static int
+myri10ge_poll(struct net_device *netdev, int *budget)
+{
+ struct myri10ge_priv *mgp = netdev_priv(netdev);
+ myri10ge_rx_done_t *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_napi_intr(int irq, void *arg, struct pt_regs *regs)
+{
+ struct myri10ge_priv *mgp = (struct myri10ge_priv *) arg;
+ mcp_irq_data_t *stats = mgp->fw_stats;
+ myri10ge_tx_buf_t *tx = &mgp->tx;
+ uint32_t 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 (*((uint8_t * 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 (*((uint8_t * volatile) &stats->valid));
+
+ myri10ge_check_statblock(mgp);
+
+ __raw_writel(htonl(3), mgp->irq_claim + 1);
+ return (IRQ_HANDLED);
+}
+
+
+static irqreturn_t
+myri10ge_intr(int irq, void *arg, struct pt_regs *regs)
+{
+ struct myri10ge_priv *mgp = (struct myri10ge_priv *) arg;
+ mcp_irq_data_t *stats = mgp->fw_stats;
+ myri10ge_tx_buf_t *tx = &mgp->tx;
+ myri10ge_rx_done_t *rx_done = &mgp->rx_done;
+ uint32_t send_done_count;
+ uint8_t valid;
+ int limit, i;
+
+ /* make sure it is our IRQ, and that the DMA has finished */
+ if (unlikely(!stats->valid)) {
+ return (IRQ_NONE);
+ }
+ valid = stats->valid;
+ if (!mgp->msi_enabled) {
+ __raw_writel(0, mgp->irq_deassert);
+ if (!myri10ge_deassert_wait)
+ stats->valid = 0;
+ mb();
+ } else {
+ stats->valid = 0;
+ }
+
+ i = 0;
+ do {
+ /* check for transmit completes and receives */
+ send_done_count = ntohl(stats->send_done_count);
+ while ((send_done_count != tx->pkt_done) ||
+ (rx_done->entry[rx_done->idx].length != 0)) {
+ myri10ge_tx_done(mgp, (int)send_done_count);
+ limit = 2 * myri10ge_max_intr_slots;
+ myri10ge_clean_rx_done(mgp, &limit);
+ send_done_count = ntohl(stats->send_done_count);
+ }
+ 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 (*((uint8_t * volatile) &stats->valid));
+
+ myri10ge_check_statblock(mgp);
+ /* check to see if we have rx token, pass it back
+ if we do */
+ if (valid & 0x1)
+ __raw_writel(htonl(3), mgp->irq_claim);
+ __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 int
+myri10ge_set_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
+{
+ return -EINVAL;
+}
+
+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,
+ .set_settings = myri10ge_set_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
+};