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ipxe/src/drivers/net/mtnic.c

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/*
* Copyright (c) 2007 Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <stdio.h>
#include <strings.h>
#include <errno.h>
#include <gpxe/malloc.h>
#include <gpxe/umalloc.h>
#include <bits/byteswap.h>
#include <little_bswap.h>
#include <timer.h>
#include <gpxe/pci.h>
#include <gpxe/ethernet.h>
#include <gpxe/netdevice.h>
#include <gpxe/iobuf.h>
#include "mtnic.h"
/*
mtnic.c - gPXE driver for Mellanox 10Gig ConnectX EN
*/
/** Set port number to use
*
* 0 - port 1
* 1 - port 2
*/
#define MTNIC_PORT_NUM 0
/* Note: for verbose printing do Make ... DEBUG=mtnic */
/********************************************************************
*
* MTNIC allocation functions
*
*********************************************************************/
/**
* mtnic_alloc_aligned
*
* @v unsigned int size size
* @v void **va virtual address
* @v u32 *pa physical address
* @v u32 aligment aligment
*
* Function allocate aligned buffer and put it's virtual address in 'va'
* and it's physical aligned address in 'pa'
*/
static int
mtnic_alloc_aligned(unsigned int size, void **va, u32 *pa, unsigned int alignment)
{
*va = alloc_memblock(size, alignment);
if (!*va) {
return MTNIC_ERROR;
}
*pa = (u32)virt_to_bus(*va);
return 0;
}
/**
*
* mtnic alloc command interface
*
*/
static int
mtnic_alloc_cmdif(struct mtnic_priv *priv)
{
u32 bar = mtnic_pci_dev.dev.bar[0];
priv->hcr = ioremap(bar + MTNIC_HCR_BASE, MTNIC_HCR_SIZE);
if (!priv->hcr) {
eprintf("Couldn't map command register.");
return MTNIC_ERROR;
}
mtnic_alloc_aligned(PAGE_SIZE, (void *)&priv->cmd.buf, &priv->cmd.mapping, PAGE_SIZE);
if (!priv->cmd.buf) {
eprintf("Error in allocating buffer for command interface\n");
return MTNIC_ERROR;
}
return 0;
}
/**
* Free RX io buffers
*/
static void
mtnic_free_io_buffers(struct mtnic_ring *ring)
{
int index;
for (; ring->cons <= ring->prod; ++ring->cons) {
index = ring->cons & ring->size_mask;
if (ring->iobuf[index])
free_iob(ring->iobuf[index]);
}
}
/**
*
* mtnic alloc and attach io buffers
*
*/
static int
mtnic_alloc_iobuf(struct mtnic_priv *priv, struct mtnic_ring *ring,
unsigned int size)
{
struct mtnic_rx_desc *rx_desc_ptr = ring->buf;
u32 index;
while ((u32)(ring->prod - ring->cons) < UNITS_BUFFER_SIZE) {
index = ring->prod & ring->size_mask;
ring->iobuf[index] = alloc_iob(size);
if (!&ring->iobuf[index]) {
if (ring->prod <= (ring->cons + 1)) {
eprintf("Error allocating Rx io "
"buffer number %lx", index);
/* In case of error freeing io buffer */
mtnic_free_io_buffers(ring);
return MTNIC_ERROR;
}
break;
}
/* Attach io_buffer to descriptor */
rx_desc_ptr = ring->buf +
(sizeof(struct mtnic_rx_desc) * index);
rx_desc_ptr->data.count = cpu_to_be32(size);
rx_desc_ptr->data.mem_type = priv->fw.mem_type_snoop_be;
rx_desc_ptr->data.addr_l = cpu_to_be32(
virt_to_bus(ring->iobuf[index]->data));
++ ring->prod;
}
/* Update RX producer index (PI) */
ring->db->count = cpu_to_be32(ring->prod & 0xffff);
return 0;
}
/**
* mtnic alloc ring
*
* Alloc and configure TX or RX ring
*
*/
static int
mtnic_alloc_ring(struct mtnic_priv *priv, struct mtnic_ring *ring,
u32 size, u16 stride, u16 cq, u8 is_rx)
{
unsigned int i;
int err;
struct mtnic_rx_desc *rx_desc;
struct mtnic_tx_desc *tx_desc;
ring->size = size; /* Number of descriptors */
ring->size_mask = size - 1;
ring->stride = stride; /* Size of each entry */
ring->cq = cq; /* CQ number associated with this ring */
ring->cons = 0;
ring->prod = 0;
/* Alloc descriptors buffer */
ring->buf_size = ring->size * ((is_rx) ? sizeof(struct mtnic_rx_desc) :
sizeof(struct mtnic_tx_desc));
err = mtnic_alloc_aligned(ring->buf_size, (void *)&ring->buf,
&ring->dma, PAGE_SIZE);
if (err) {
eprintf("Failed allocating descriptor ring sizeof %lx\n",
ring->buf_size);
return MTNIC_ERROR;
}
memset(ring->buf, 0, ring->buf_size);
DBG("Allocated %s ring (addr:%p) - buf:%p size:%lx"
"buf_size:%lx dma:%lx\n",
is_rx ? "Rx" : "Tx", ring, ring->buf, ring->size,
ring->buf_size, ring->dma);
if (is_rx) { /* RX ring */
/* Alloc doorbell */
err = mtnic_alloc_aligned(sizeof(struct mtnic_cq_db_record),
(void *)&ring->db, &ring->db_dma, 32);
if (err) {
eprintf("Failed allocating Rx ring doorbell record\n");
free(ring->buf);
return MTNIC_ERROR;
}
/* ==- Configure Descriptor -== */
/* Init ctrl seg of rx desc */
for (i = 0; i < UNITS_BUFFER_SIZE; ++i) {
rx_desc = ring->buf +
(sizeof(struct mtnic_rx_desc) * i);
/* Pre-link descriptor */
rx_desc->next = cpu_to_be16(i + 1);
}
/*The last ctrl descriptor is '0' and points to the first one*/
/* Alloc IO_BUFFERS */
err = mtnic_alloc_iobuf(priv, ring, DEF_IOBUF_SIZE);
if (err) {
eprintf("ERROR Allocating io buffer");
free(ring->buf);
return MTNIC_ERROR;
}
} else { /* TX ring */
/* Set initial ownership of all Tx Desc' to SW (1) */
for (i = 0; i < ring->size; i++) {
tx_desc = ring->buf + ring->stride * i;
tx_desc->ctrl.op_own = cpu_to_be32(MTNIC_BIT_DESC_OWN);
}
/* DB */
ring->db_offset = cpu_to_be32(
((u32) priv->fw.tx_offset[priv->port]) << 8);
/* Map Tx+CQ doorbells */
DBG("Mapping TxCQ doorbell at offset:0x%lx\n",
priv->fw.txcq_db_offset);
ring->txcq_db = ioremap(mtnic_pci_dev.dev.bar[2] +
priv->fw.txcq_db_offset, PAGE_SIZE);
if (!ring->txcq_db) {
eprintf("Couldn't map txcq doorbell, aborting...\n");
free(ring->buf);
return MTNIC_ERROR;
}
}
return 0;
}
/**
* mtnic alloc CQ
*
* Alloc and configure CQ.
*
*/
static int
mtnic_alloc_cq(struct net_device *dev, int num, struct mtnic_cq *cq,
u8 is_rx, u32 size, u32 offset_ind)
{
int err ;
unsigned int i;
cq->num = num;
cq->dev = dev;
cq->size = size;
cq->last = 0;
cq->is_rx = is_rx;
cq->offset_ind = offset_ind;
/* Alloc doorbell */
err = mtnic_alloc_aligned(sizeof(struct mtnic_cq_db_record),
(void *)&cq->db, &cq->db_dma, 32);
if (err) {
eprintf("Failed allocating CQ doorbell record\n");
return MTNIC_ERROR;
}
memset(cq->db, 0, sizeof(struct mtnic_cq_db_record));
/* Alloc CQEs buffer */
cq->buf_size = size * sizeof(struct mtnic_cqe);
err = mtnic_alloc_aligned(cq->buf_size,
(void *)&cq->buf, &cq->dma, PAGE_SIZE);
if (err) {
eprintf("Failed allocating CQ buffer\n");
free(cq->db);
return MTNIC_ERROR;
}
memset(cq->buf, 0, cq->buf_size);
DBG("Allocated CQ (addr:%p) - size:%lx buf:%p buf_size:%lx "
"dma:%lx db:%p db_dma:%lx\n"
"cqn offset:%lx \n", cq, cq->size, cq->buf,
cq->buf_size, cq->dma, cq->db,
cq->db_dma, offset_ind);
/* Set ownership of all CQEs to HW */
DBG("Setting HW ownership for CQ:%d\n", num);
for (i = 0; i < cq->size; i++) {
/* Initial HW ownership is 1 */
cq->buf[i].op_tr_own = MTNIC_BIT_CQ_OWN;
}
return 0;
}
/**
* mtnic_alloc_resources
*
* Alloc and configure CQs, Tx, Rx
*/
unsigned int
mtnic_alloc_resources(struct net_device *dev)
{
struct mtnic_priv *priv = netdev_priv(dev);
int err;
int cq_ind = 0;
int cq_offset = priv->fw.cq_offset;
/* Alloc 1st CQ */
err = mtnic_alloc_cq(dev, cq_ind, &priv->cq[cq_ind], 1 /* RX */,
UNITS_BUFFER_SIZE, cq_offset + cq_ind);
if (err) {
eprintf("Failed allocating Rx CQ\n");
return MTNIC_ERROR;
}
/* Alloc RX */
err = mtnic_alloc_ring(priv, &priv->rx_ring, UNITS_BUFFER_SIZE,
sizeof(struct mtnic_rx_desc), cq_ind, /* RX */1);
if (err) {
eprintf("Failed allocating Rx Ring\n");
goto cq0_error;
}
++cq_ind;
/* alloc 2nd CQ */
err = mtnic_alloc_cq(dev, cq_ind, &priv->cq[cq_ind], 0 /* TX */,
UNITS_BUFFER_SIZE, cq_offset + cq_ind);
if (err) {
eprintf("Failed allocating Tx CQ\n");
goto rx_error;
}
/* Alloc TX */
err = mtnic_alloc_ring(priv, &priv->tx_ring, UNITS_BUFFER_SIZE,
sizeof(struct mtnic_tx_desc), cq_ind, /* TX */ 0);
if (err) {
eprintf("Failed allocating Tx ring\n");
goto cq1_error;
}
return 0;
cq1_error:
free(priv->cq[1].buf);
free(priv->cq[1].db);
rx_error:
free(priv->rx_ring.buf);
free(priv->rx_ring.db);
mtnic_free_io_buffers(&priv->rx_ring);
cq0_error:
free(priv->cq[0].buf);
free(priv->cq[0].db);
return MTNIC_ERROR;
}
/**
* mtnic alloc_eq
*
* Note: EQ is not used by the driver but must be allocated
*/
static int
mtnic_alloc_eq(struct mtnic_priv *priv)
{
int err;
unsigned int i;
struct mtnic_eqe *eqe_desc = NULL;
/* Allocating doorbell */
priv->eq_db = ioremap(mtnic_pci_dev.dev.bar[2] +
priv->fw.eq_db_offset, sizeof(u32));
if (!priv->eq_db) {
eprintf("Couldn't map EQ doorbell, aborting...\n");
return MTNIC_ERROR;
}
/* Allocating buffer */
priv->eq.size = NUM_EQES;
priv->eq.buf_size = priv->eq.size * sizeof(struct mtnic_eqe);
err = mtnic_alloc_aligned(priv->eq.buf_size, (void *)&priv->eq.buf,
&priv->eq.dma, PAGE_SIZE);
if (err) {
eprintf("Failed allocating EQ buffer\n");
iounmap(priv->eq_db);
return MTNIC_ERROR;
}
memset(priv->eq.buf, 0, priv->eq.buf_size);
for (i = 0; i < priv->eq.size; i++)
eqe_desc = priv->eq.buf + (sizeof(struct mtnic_eqe) * i);
eqe_desc->own |= MTNIC_BIT_EQE_OWN;
mdelay(20);
return 0;
}
/********************************************************************
*
* Mtnic commands functions
* -=-=-=-=-=-=-=-=-=-=-=-=
*
*
*
*********************************************************************/
static inline int
cmdif_go_bit(struct mtnic_priv *priv)
{
struct mtnic_if_cmd_reg *hcr = priv->hcr;
u32 status;
int i;
for (i = 0; i < TBIT_RETRIES; i++) {
status = be32_to_cpu(readl(&hcr->status_go_opcode));
if ((status & MTNIC_BC_MASK(MTNIC_MASK_CMD_REG_T_BIT)) ==
(priv->cmd.tbit << MTNIC_BC_OFF(MTNIC_MASK_CMD_REG_T_BIT))) {
/* Read expected t-bit - now return go-bit value */
return status & MTNIC_BC_MASK(MTNIC_MASK_CMD_REG_GO_BIT);
}
}
eprintf("Invalid tbit after %d retries!\n", TBIT_RETRIES);
return 1; /* Return busy... */
}
/* Base Command interface */
static int
mtnic_cmd(struct mtnic_priv *priv, void *in_imm,
void *out_imm, u32 in_modifier, u16 op)
{
struct mtnic_if_cmd_reg *hcr = priv->hcr;
int err = 0;
u32 out_param_h = 0;
u32 out_param_l = 0;
u32 in_param_h = 0;
u32 in_param_l = 0;
static u16 token = 0x8000;
u32 status;
unsigned int timeout = 0;
token++;
if (cmdif_go_bit(priv)) {
eprintf("GO BIT BUSY:%p.\n", hcr + 6);
err = MTNIC_ERROR;
goto out;
}
if (in_imm) {
in_param_h = *((u32*)in_imm);
in_param_l = *((u32*)in_imm + 1);
} else {
in_param_l = cpu_to_be32(priv->cmd.mapping);
}
out_param_l = cpu_to_be32(priv->cmd.mapping);
/* writing to MCR */
writel(in_param_h, &hcr->in_param_h);
writel(in_param_l, &hcr->in_param_l);
writel((u32) cpu_to_be32(in_modifier), &hcr->input_modifier);
writel(out_param_h, &hcr->out_param_h);
writel(out_param_l, &hcr->out_param_l);
writel((u32)cpu_to_be32(token << 16), &hcr->token);
wmb();
/* flip toggle bit before each write to the HCR */
priv->cmd.tbit = !priv->cmd.tbit;
writel((u32)
cpu_to_be32(MTNIC_BC_MASK(MTNIC_MASK_CMD_REG_GO_BIT) |
(priv->cmd.tbit << MTNIC_BC_OFF(MTNIC_MASK_CMD_REG_T_BIT)) | op),
&hcr->status_go_opcode);
while (cmdif_go_bit(priv) && (timeout <= GO_BIT_TIMEOUT)) {
mdelay(1);
++timeout;
}
if (cmdif_go_bit(priv)) {
eprintf("Command opcode:0x%x token:0x%x TIMEOUT.\n", op, token);
err = MTNIC_ERROR;
goto out;
}
if (out_imm) {
*((u32 *)out_imm) = readl(&hcr->out_param_h);
*((u32 *)out_imm + 1) = readl(&hcr->out_param_l);
}
status = be32_to_cpu((u32)readl(&hcr->status_go_opcode)) >> 24;
/*DBG("Command opcode:0x%x token:0x%x returned:0x%lx\n",
op, token, status);*/
if (status) {
return status;
}
out:
return err;
}
/* MAP PAGES wrapper */
static int
mtnic_map_cmd(struct mtnic_priv *priv, u16 op, struct mtnic_pages pages)
{
unsigned int j;
u32 addr;
unsigned int len;
u32 *page_arr = priv->cmd.buf;
int nent = 0;
int err = 0;
memset(page_arr, 0, PAGE_SIZE);
len = PAGE_SIZE * pages.num;
pages.buf = (u32 *)umalloc(PAGE_SIZE * (pages.num + 1));
addr = PAGE_SIZE + ((virt_to_bus(pages.buf) & 0xfffff000) + PAGE_SIZE);
DBG("Mapping pages: size: %lx address: %p\n", pages.num, pages.buf);
if (addr & (PAGE_MASK)) {
eprintf("Got FW area not aligned to %d (%llx/%x)\n",
PAGE_SIZE, (u64) addr, len);
return MTNIC_ERROR;
}
/* Function maps each PAGE seperately */
for (j = 0; j < len; j+= PAGE_SIZE) {
page_arr[nent * 4 + 3] = cpu_to_be32(addr + j);
if (++nent == MTNIC_MAILBOX_SIZE / 16) {
err = mtnic_cmd(priv, NULL, NULL, nent, op);
if (err)
return MTNIC_ERROR;
nent = 0;
}
}
if (nent)
err = mtnic_cmd(priv, NULL, NULL, nent, op);
return err;
}
/*
* Query FW
*/
static int
mtnic_QUERY_FW(struct mtnic_priv *priv)
{
int err;
struct mtnic_if_query_fw_out_mbox *cmd = priv->cmd.buf;
err = mtnic_cmd(priv, NULL, NULL, 0, MTNIC_IF_CMD_QUERY_FW);
if (err)
return MTNIC_ERROR;
/* Get FW and interface versions */
priv->fw_ver = ((u64) be16_to_cpu(cmd->rev_maj) << 32) |
((u64) be16_to_cpu(cmd->rev_min) << 16) |
(u64) be16_to_cpu(cmd->rev_smin);
priv->fw.ifc_rev = be16_to_cpu(cmd->ifc_rev);
/* Get offset for internal error reports (debug) */
priv->fw.err_buf.offset = be64_to_cpu(cmd->err_buf_start);
priv->fw.err_buf.size = be32_to_cpu(cmd->err_buf_size);
DBG("Error buf offset is %llx\n", priv->fw.err_buf.offset);
/* Get number of required FW (4k) pages */
priv->fw.fw_pages.num = be16_to_cpu(cmd->fw_pages);
return 0;
}
static int
mtnic_OPEN_NIC(struct mtnic_priv *priv)
{
struct mtnic_if_open_nic_in_mbox *open_nic = priv->cmd.buf;
u32 extra_pages[2] = {0};
int err;
memset(open_nic, 0, sizeof *open_nic);
/* port 1 */
open_nic->log_rx_p1 = 0;
open_nic->log_cq_p1 = 1;
open_nic->log_tx_p1 = 0;
open_nic->steer_p1 = MTNIC_IF_STEER_RSS;
/* MAC + VLAN - leave reserved */
/* port 2 */
open_nic->log_rx_p2 = 0;
open_nic->log_cq_p2 = 1;
open_nic->log_tx_p2 = 0;
open_nic->steer_p2 = MTNIC_IF_STEER_RSS;
/* MAC + VLAN - leave reserved */
err = mtnic_cmd(priv, NULL, extra_pages, 0, MTNIC_IF_CMD_OPEN_NIC);
priv->fw.extra_pages.num = be32_to_cpu(*(extra_pages+1));
DBG("Extra pages num is %lx\n", priv->fw.extra_pages.num);
return err;
}
static int
mtnic_CONFIG_RX(struct mtnic_priv *priv)
{
struct mtnic_if_config_rx_in_imm config_rx;
memset(&config_rx, 0, sizeof config_rx);
return mtnic_cmd(priv, &config_rx, NULL, 0, MTNIC_IF_CMD_CONFIG_RX);
}
static int
mtnic_CONFIG_TX(struct mtnic_priv *priv)
{
struct mtnic_if_config_send_in_imm config_tx;
config_tx.enph_gpf = 0;
return mtnic_cmd(priv, &config_tx, NULL, 0, MTNIC_IF_CMD_CONFIG_TX);
}
static int
mtnic_HEART_BEAT(struct mtnic_priv *priv, u32 *link_state)
{
struct mtnic_if_heart_beat_out_imm heart_beat;
int err;
u32 flags;
err = mtnic_cmd(priv, NULL, &heart_beat, 0, MTNIC_IF_CMD_HEART_BEAT);
if (!err) {
flags = be32_to_cpu(heart_beat.flags);
if (flags & MTNIC_BC_MASK(MTNIC_MASK_HEAR_BEAT_INT_ERROR)) {
eprintf("Internal error detected\n");
return MTNIC_ERROR;
}
*link_state = flags &
~((u32) MTNIC_BC_MASK(MTNIC_MASK_HEAR_BEAT_INT_ERROR));
}
return err;
}
/*
* Port commands
*/
static int
mtnic_SET_PORT_DEFAULT_RING(struct mtnic_priv *priv, u8 port, u16 ring)
{
struct mtnic_if_set_port_default_ring_in_imm def_ring;
memset(&def_ring, 0, sizeof(def_ring));
def_ring.ring = ring;
return mtnic_cmd(priv, &def_ring, NULL, port + 1,
MTNIC_IF_CMD_SET_PORT_DEFAULT_RING);
}
static int
mtnic_CONFIG_PORT_RSS_STEER(struct mtnic_priv *priv, int port)
{
memset(priv->cmd.buf, 0, PAGE_SIZE);
return mtnic_cmd(priv, NULL, NULL, port + 1,
MTNIC_IF_CMD_CONFIG_PORT_RSS_STEER);
}
static int
mtnic_SET_PORT_RSS_INDIRECTION(struct mtnic_priv *priv, int port)
{
memset(priv->cmd.buf, 0, PAGE_SIZE);
return mtnic_cmd(priv, NULL, NULL, port + 1,
MTNIC_IF_CMD_SET_PORT_RSS_INDIRECTION);
}
/*
* Config commands
*/
static int
mtnic_CONFIG_CQ(struct mtnic_priv *priv, int port,
u16 cq_ind, struct mtnic_cq *cq)
{
struct mtnic_if_config_cq_in_mbox *config_cq = priv->cmd.buf;
memset(config_cq, 0, sizeof *config_cq);
config_cq->cq = cq_ind;
config_cq->size = fls(UNITS_BUFFER_SIZE - 1);
config_cq->offset = ((cq->dma) & (PAGE_MASK)) >> 6;
config_cq->db_record_addr_l = cpu_to_be32(cq->db_dma);
config_cq->page_address[1] = cpu_to_be32(cq->dma);
DBG("config cq address: %lx dma_address: %lx"
"offset: %d size %d index: %d "
, config_cq->page_address[1],cq->dma,
config_cq->offset, config_cq->size, config_cq->cq );
return mtnic_cmd(priv, NULL, NULL, port + 1,
MTNIC_IF_CMD_CONFIG_CQ);
}
static int
mtnic_CONFIG_TX_RING(struct mtnic_priv *priv, u8 port,
u16 ring_ind, struct mtnic_ring *ring)
{
struct mtnic_if_config_send_ring_in_mbox *config_tx_ring = priv->cmd.buf;
memset(config_tx_ring, 0, sizeof *config_tx_ring);
config_tx_ring->ring = cpu_to_be16(ring_ind);
config_tx_ring->size = fls(UNITS_BUFFER_SIZE - 1);
config_tx_ring->cq = cpu_to_be16(ring->cq);
config_tx_ring->page_address[1] = cpu_to_be32(ring->dma);
return mtnic_cmd(priv, NULL, NULL, port + 1,
MTNIC_IF_CMD_CONFIG_TX_RING);
}
static int
mtnic_CONFIG_RX_RING(struct mtnic_priv *priv, u8 port,
u16 ring_ind, struct mtnic_ring *ring)
{
struct mtnic_if_config_rx_ring_in_mbox *config_rx_ring = priv->cmd.buf;
memset(config_rx_ring, 0, sizeof *config_rx_ring);
config_rx_ring->ring = ring_ind;
MTNIC_BC_PUT(config_rx_ring->stride_size, fls(UNITS_BUFFER_SIZE - 1),
MTNIC_MASK_CONFIG_RX_RING_SIZE);
MTNIC_BC_PUT(config_rx_ring->stride_size, 1,
MTNIC_MASK_CONFIG_RX_RING_STRIDE);
config_rx_ring->cq = cpu_to_be16(ring->cq);
config_rx_ring->db_record_addr_l = cpu_to_be32(ring->db_dma);
DBG("Config RX ring starting at address:%lx\n", ring->dma);
config_rx_ring->page_address[1] = cpu_to_be32(ring->dma);
return mtnic_cmd(priv, NULL, NULL, port + 1,
MTNIC_IF_CMD_CONFIG_RX_RING);
}
static int
mtnic_CONFIG_EQ(struct mtnic_priv *priv)
{
struct mtnic_if_config_eq_in_mbox *eq = priv->cmd.buf;
if (priv->eq.dma & (PAGE_MASK)) {
eprintf("misalligned eq buffer:%lx\n",
priv->eq.dma);
return MTNIC_ERROR;
}
memset(eq, 0, sizeof *eq);
MTNIC_BC_PUT(eq->offset, priv->eq.dma >> 6, MTNIC_MASK_CONFIG_EQ_OFFSET);
MTNIC_BC_PUT(eq->size, fls(priv->eq.size - 1) - 1, MTNIC_MASK_CONFIG_EQ_SIZE);
MTNIC_BC_PUT(eq->int_vector, 0, MTNIC_MASK_CONFIG_EQ_INT_VEC);
eq->page_address[1] = cpu_to_be32(priv->eq.dma);
return mtnic_cmd(priv, NULL, NULL, 0, MTNIC_IF_CMD_CONFIG_EQ);
}
static int
mtnic_SET_RX_RING_ADDR(struct mtnic_priv *priv, u8 port, u64* mac)
{
struct mtnic_if_set_rx_ring_addr_in_imm ring_addr;
u32 modifier = ((u32) port + 1) << 16;
memset(&ring_addr, 0, sizeof(ring_addr));
ring_addr.mac_31_0 = cpu_to_be32(*mac & 0xffffffff);
ring_addr.mac_47_32 = cpu_to_be16((*mac >> 32) & 0xffff);
ring_addr.flags_vlan_id |= cpu_to_be16(
MTNIC_BC_MASK(MTNIC_MASK_SET_RX_RING_ADDR_BY_MAC));
return mtnic_cmd(priv, &ring_addr, NULL, modifier, MTNIC_IF_CMD_SET_RX_RING_ADDR);
}
static int
mtnic_SET_PORT_STATE(struct mtnic_priv *priv, u8 port, u8 state)
{
struct mtnic_if_set_port_state_in_imm port_state;
port_state.state = state ? cpu_to_be32(
MTNIC_BC_MASK(MTNIC_MASK_CONFIG_PORT_STATE)) : 0;
port_state.reserved = 0;
return mtnic_cmd(priv, &port_state, NULL, port + 1,
MTNIC_IF_CMD_SET_PORT_STATE);
}
static int
mtnic_SET_PORT_MTU(struct mtnic_priv *priv, u8 port, u16 mtu)
{
struct mtnic_if_set_port_mtu_in_imm set_mtu;
memset(&set_mtu, 0, sizeof(set_mtu));
set_mtu.mtu = cpu_to_be16(mtu);
return mtnic_cmd(priv, &set_mtu, NULL, port + 1,
MTNIC_IF_CMD_SET_PORT_MTU);
}
static int
mtnic_CONFIG_PORT_VLAN_FILTER(struct mtnic_priv *priv, int port)
{
struct mtnic_if_config_port_vlan_filter_in_mbox *vlan_filter = priv->cmd.buf;
/* When no vlans are configured we disable the filter
* (i.e., pass all vlans) because we ignore them anyhow */
memset(vlan_filter, 0xff, sizeof(*vlan_filter));
return mtnic_cmd(priv, NULL, NULL, port + 1,
MTNIC_IF_CMD_CONFIG_PORT_VLAN_FILTER);
}
static int
mtnic_RELEASE_RESOURCE(struct mtnic_priv *priv, u8 port, u8 type, u8 index)
{
struct mtnic_if_release_resource_in_imm rel;
memset(&rel, 0, sizeof rel);
rel.index = index;
rel.type = type;
return mtnic_cmd(priv,
&rel, NULL, (type == MTNIC_IF_RESOURCE_TYPE_EQ) ?
0 : port + 1, MTNIC_IF_CMD_RELEASE_RESOURCE);
}
static int
mtnic_QUERY_CAP(struct mtnic_priv *priv, u8 index, u8 mod, u64 *result)
{
struct mtnic_if_query_cap_in_imm cap;
u32 out_imm[2];
int err;
memset(&cap, 0, sizeof cap);
cap.cap_index = index;
cap.cap_modifier = mod;
err = mtnic_cmd(priv, &cap, &out_imm, 0, MTNIC_IF_CMD_QUERY_CAP);
*((u32*)result) = be32_to_cpu(*(out_imm+1));
*((u32*)result + 1) = be32_to_cpu(*out_imm);
DBG("Called Query cap with index:0x%x mod:%d result:0x%llx"
" error:%d\n", index, mod, *result, err);
return err;
}
#define DO_QUERY_CAP(cap, mod, var) \
err = mtnic_QUERY_CAP(priv, cap, mod, &result); \
if (err) \
return err; \
(var) = result
static int
mtnic_query_cap(struct mtnic_priv *priv)
{
int err = 0;
int i;
u64 result;
DO_QUERY_CAP(MTNIC_IF_CAP_NUM_PORTS, 0, priv->fw.num_ports);
for (i = 0; i < priv->fw.num_ports; i++) {
DO_QUERY_CAP(MTNIC_IF_CAP_DEFAULT_MAC, i + 1, priv->fw.mac[i]);
}
return 0;
}
static int
mtnic_query_offsets(struct mtnic_priv *priv)
{
int err;
int i;
u64 result;
DO_QUERY_CAP(MTNIC_IF_CAP_MEM_KEY,
MTNIC_IF_MEM_TYPE_SNOOP,
priv->fw.mem_type_snoop_be);
priv->fw.mem_type_snoop_be = cpu_to_be32(priv->fw.mem_type_snoop_be);
DO_QUERY_CAP(MTNIC_IF_CAP_TX_CQ_DB_OFFSET, 0, priv->fw.txcq_db_offset);
DO_QUERY_CAP(MTNIC_IF_CAP_EQ_DB_OFFSET, 0, priv->fw.eq_db_offset);
for (i = 0; i < priv->fw.num_ports; i++) {
DO_QUERY_CAP(MTNIC_IF_CAP_CQ_OFFSET, i + 1, priv->fw.cq_offset);
DO_QUERY_CAP(MTNIC_IF_CAP_TX_OFFSET, i + 1, priv->fw.tx_offset[i]);
DO_QUERY_CAP(MTNIC_IF_CAP_RX_OFFSET, i + 1, priv->fw.rx_offset[i]);
DBG("--> Port %d CQ offset:0x%x\n", i, priv->fw.cq_offset);
DBG("--> Port %d Tx offset:0x%x\n", i, priv->fw.tx_offset[i]);
DBG("--> Port %d Rx offset:0x%x\n", i, priv->fw.rx_offset[i]);
}
mdelay(20);
return 0;
}
/********************************************************************
*
* MTNIC initalization functions
*
*
*
*
*********************************************************************/
/**
* Reset device
*/
void
mtnic_reset(void)
{
void *reset = ioremap(mtnic_pci_dev.dev.bar[0] + MTNIC_RESET_OFFSET, 4);
writel(cpu_to_be32(1), reset);
iounmap(reset);
}
/**
* Restore PCI config
*/
static int
restore_config(void)
{
int i;
int rc;
for (i = 0; i < 64; ++i) {
if (i != 22 && i != 23) {
rc = pci_write_config_dword(mtnic_pci_dev.dev.dev,
i << 2,
mtnic_pci_dev.dev.
dev_config_space[i]);
if (rc)
return rc;
}
}
return 0;
}
/**
* Init PCI configuration
*/
static int
mtnic_init_pci(struct pci_device *dev)
{
int i;
int err;
/* save bars */
DBG("bus=%d devfn=0x%x", dev->bus, dev->devfn);
for (i = 0; i < 6; ++i) {
mtnic_pci_dev.dev.bar[i] =
pci_bar_start(dev, PCI_BASE_ADDRESS_0 + (i << 2));
DBG("bar[%d]= 0x%08lx \n", i, mtnic_pci_dev.dev.bar[i]);
}
/* save config space */
for (i = 0; i < 64; ++i) {
err = pci_read_config_dword(dev, i << 2,
&mtnic_pci_dev.dev.
dev_config_space[i]);
if (err) {
eprintf("Can not save configuration space");
return err;
}
}
mtnic_pci_dev.dev.dev = dev;
return 0;
}
/**
* Initial hardware
*/
static inline
int mtnic_init_card(struct net_device *dev)
{
struct mtnic_priv *priv = netdev_priv(dev);
int err = 0;
/* Set state */
priv->state = CARD_DOWN;
/* Set port */
priv->port = MTNIC_PORT_NUM;
/* Alloc command interface */
err = mtnic_alloc_cmdif(priv);
if (err) {
eprintf("Failed to init command interface, aborting.\n");
return MTNIC_ERROR;
}
/**
* Bring up HW
*/
err = mtnic_QUERY_FW(priv);
if (err) {
eprintf("QUERY_FW command failed, aborting.\n");
goto cmd_error;
}
DBG("Command interface revision:%d\n", priv->fw.ifc_rev);
/* Allocate memory for FW and start it */
err = mtnic_map_cmd(priv, MTNIC_IF_CMD_MAP_FW, priv->fw.fw_pages);
if (err) {
eprintf("Eror In MAP_FW\n");
if (priv->fw.fw_pages.buf)
free(priv->fw.fw_pages.buf);
goto cmd_error;
}
/* Run firmware */
err = mtnic_cmd(priv, NULL, NULL, 0, MTNIC_IF_CMD_RUN_FW);
if (err) {
eprintf("Eror In RUN FW\n");
goto map_fw_error;
}
DBG("FW version:%d.%d.%d\n",
(u16) (priv->fw_ver >> 32),
(u16) ((priv->fw_ver >> 16) & 0xffff),
(u16) (priv->fw_ver & 0xffff));
/* Get device information */
err = mtnic_query_cap(priv);
if (err) {
eprintf("Insufficient resources, aborting.\n");
goto map_fw_error;
}
/* Open NIC */
err = mtnic_OPEN_NIC(priv);
if (err) {
eprintf("Failed opening NIC, aborting.\n");
goto map_fw_error;
}
/* Allocate and map pages worksace */
err = mtnic_map_cmd(priv, MTNIC_IF_CMD_MAP_PAGES, priv->fw.extra_pages);
if (err) {
eprintf("Couldn't allocate %lx FW extra pages, aborting.\n",
priv->fw.extra_pages.num);
if (priv->fw.extra_pages.buf)
free(priv->fw.extra_pages.buf);
goto map_fw_error;
}
/* Get device offsets */
err = mtnic_query_offsets(priv);
if (err) {
eprintf("Failed retrieving resource offests, aborting.\n");
free(priv->fw.extra_pages.buf);
goto map_extra_error;
}
/* Alloc EQ */
err = mtnic_alloc_eq(priv);
if (err) {
eprintf("Failed init shared resources. error: %d\n", err);
goto map_extra_error;
}
/* Configure HW */
err = mtnic_CONFIG_EQ(priv);
if (err) {
eprintf("Failed configuring EQ\n");
goto eq_error;
}
err = mtnic_CONFIG_RX(priv);
if (err) {
eprintf("Failed Rx configuration\n");
goto eq_error;
}
err = mtnic_CONFIG_TX(priv);
if (err) {
eprintf("Failed Tx configuration\n");
goto eq_error;
}
DBG("Activating port:%d\n", MTNIC_PORT_NUM + 1);
priv->state = CARD_INITIALIZED;
return 0;
eq_error:
iounmap(priv->eq_db);
free(priv->eq.buf);
map_extra_error:
free(priv->fw.extra_pages.buf);
map_fw_error:
free(priv->fw.fw_pages.buf);
cmd_error:
iounmap(priv->hcr);
free(priv->cmd.buf);
free(priv);
return MTNIC_ERROR;
}
/*******************************************************************
*
* Process functions
*
* process compliations of TX and RX
*
*
********************************************************************/
void mtnic_process_tx_cq(struct mtnic_priv *priv, struct net_device *dev,
struct mtnic_cq *cq)
{
struct mtnic_cqe *cqe = cq->buf;
struct mtnic_ring *ring = &priv->tx_ring;
u16 index;
index = cq->last & (cq->size-1);
cqe = &cq->buf[index];
/* Owner bit changes every round */
while (XNOR(cqe->op_tr_own & MTNIC_BIT_CQ_OWN, cq->last & cq->size)) {
netdev_tx_complete (dev, ring->iobuf[index]);
++cq->last;
index = cq->last & (cq->size-1);
cqe = &cq->buf[index];
}
/* Update consumer index */
cq->db->update_ci = cpu_to_be32(cq->last & 0xffffff);
wmb(); /* ensure HW sees CQ consumer before we post new buffers */
ring->cons = cq->last;
}
int mtnic_process_rx_cq(struct mtnic_priv *priv, struct net_device *dev, struct mtnic_cq *cq)
{
struct mtnic_cqe *cqe;
struct mtnic_ring *ring = &priv->rx_ring;
int index;
int err;
struct io_buffer *rx_iob;
/* We assume a 1:1 mapping between CQEs and Rx descriptors, so Rx
* descriptor offset can be deduced from the CQE index instead of
* reading 'cqe->index' */
index = cq->last & (cq->size-1);
cqe = &cq->buf[index];
/* Process all completed CQEs */
while (XNOR(cqe->op_tr_own & MTNIC_BIT_CQ_OWN, cq->last & cq->size)) {
/* Drop packet on bad receive or bad checksum */
if ((cqe->op_tr_own & 0x1f) == MTNIC_OPCODE_ERROR) {
DBG("CQE completed with error - vendor \n");
free_iob(ring->iobuf[index]);
goto next;
}
if (cqe->enc_bf & MTNIC_BIT_BAD_FCS) {
DBG("Accepted packet with bad FCS\n");
free_iob(ring->iobuf[index]);
goto next;
}
/*
* Packet is OK - process it.
*/
rx_iob = ring->iobuf[index];
iob_put(rx_iob, DEF_IOBUF_SIZE);
/* Add this packet to the receive queue. */
netdev_rx(dev, rx_iob);
ring->iobuf[index] = NULL;
next:
++cq->last;
index = cq->last & (cq->size-1);
cqe = &cq->buf[index];
}
/* Update consumer index */
cq->db->update_ci = cpu_to_be32(cq->last & 0xffffff);
wmb(); /* ensure HW sees CQ consumer before we post new buffers */
ring->cons = cq->last;
if (ring->prod - ring->cons < (MAX_GAP_PROD_CONS)) {
err = mtnic_alloc_iobuf(priv, &priv->rx_ring, DEF_IOBUF_SIZE);
if (err) {
eprintf("ERROR Allocating io buffer");
return MTNIC_ERROR;
}
}
return 0;
}
/********************************************************************
*
* net_device functions
*
*
* open, poll, close, probe, disable, irq
*
*********************************************************************/
static int
mtnic_open(struct net_device *dev)
{
struct mtnic_priv *priv = netdev_priv(dev);
int err = 0;
struct mtnic_ring *ring;
struct mtnic_cq *cq;
int cq_ind = 0;
u32 dev_link_state;
DBG("starting port:%d", priv->port);
/* Alloc and configure CQs, TX, RX */
err = mtnic_alloc_resources(dev);
if (err) {
eprintf("Error allocating resources\n");
return MTNIC_ERROR;
}
/* Pass CQs configuration to HW */
for (cq_ind = 0; cq_ind < NUM_CQS; ++cq_ind) {
cq = &priv->cq[cq_ind];
err = mtnic_CONFIG_CQ(priv, priv->port, cq_ind, cq);
if (err) {
eprintf("Failed configuring CQ:%d error %d\n",
cq_ind, err);
if (cq_ind)
goto cq_error;
else
return MTNIC_ERROR;
}
/* Update consumer index */
cq->db->update_ci = cpu_to_be32(cq->last & 0xffffff);
}
/* Pass Tx configuration to HW */
ring = &priv->tx_ring;
err = mtnic_CONFIG_TX_RING(priv, priv->port, 0, ring);
if (err) {
eprintf("Failed configuring Tx ring:0\n");
goto cq_error;
}
/* Pass RX configuration to HW */
ring = &priv->rx_ring;
err = mtnic_CONFIG_RX_RING(priv, priv->port, 0, ring);
if (err) {
eprintf("Failed configuring Rx ring:0\n");
goto tx_error;
}
/* Configure Rx steering */
err = mtnic_CONFIG_PORT_RSS_STEER(priv, priv->port);
if (!err)
err = mtnic_SET_PORT_RSS_INDIRECTION(priv, priv->port);
if (err) {
eprintf("Failed configuring RSS steering\n");
goto rx_error;
}
/* Set the port default ring to ring 0 */
err = mtnic_SET_PORT_DEFAULT_RING(priv, priv->port, 0);
if (err) {
eprintf("Failed setting default ring\n");
goto rx_error;
}
/* Set Mac address */
err = mtnic_SET_RX_RING_ADDR(priv, priv->port, &priv->fw.mac[priv->port]);
if (err) {
eprintf("Failed setting default MAC address\n");
goto rx_error;
}
/* Set MTU */
err = mtnic_SET_PORT_MTU(priv, priv->port, DEF_MTU);
if (err) {
eprintf("Failed setting MTU\n");
goto rx_error;
}
/* Configure VLAN filter */
err = mtnic_CONFIG_PORT_VLAN_FILTER(priv, priv->port);
if (err) {
eprintf("Failed configuring VLAN filter\n");
goto rx_error;
}
/* Bring up physical link */
err = mtnic_SET_PORT_STATE(priv, priv->port, 1);
if (err) {
eprintf("Failed bringing up port\n");
goto rx_error;
}
mdelay(300); /* Let link state stabilize if cable was connected */
priv->state = CARD_UP;
err = mtnic_HEART_BEAT(priv, &dev_link_state);
if (err) {
eprintf("Failed getting device link state\n");
return MTNIC_ERROR;
}
if (!(dev_link_state & 0x3)) {
eprintf("Link down, check cables and restart\n");
return MTNIC_ERROR;
}
return 0;
rx_error:
err = mtnic_RELEASE_RESOURCE(priv, priv->port,
MTNIC_IF_RESOURCE_TYPE_RX_RING, 0);
tx_error:
err |= mtnic_RELEASE_RESOURCE(priv, priv->port,
MTNIC_IF_RESOURCE_TYPE_TX_RING, 0);
cq_error:
while (cq_ind) {
err |= mtnic_RELEASE_RESOURCE(priv, priv->port,
MTNIC_IF_RESOURCE_TYPE_CQ, --cq_ind);
}
if (err)
DBG("Eror Releasing resources\n");
return MTNIC_ERROR;
}
/** Check if we got completion for receive and transmit and
* check the line with heart_bit command */
static void
mtnic_poll(struct net_device *dev)
{
struct mtnic_priv *priv = netdev_priv(dev);
struct mtnic_cq *cq;
u32 dev_link_state;
int err;
unsigned int i;
/* In case of an old error then return */
if (priv->state != CARD_UP)
return;
/* We do not check the device every call _poll call,
since it will slow it down */
if ((priv->poll_counter % ROUND_TO_CHECK) == 0) {
/* Check device */
err = mtnic_HEART_BEAT(priv, &dev_link_state);
if (err) {
eprintf("Device has internal error\n");
priv->state = CARD_DOWN;
return;
}
if (!(dev_link_state & 0x3)) {
eprintf("Link down, check cables and restart\n");
priv->state = CARD_DOWN;
return;
}
}
/* Polling CQ */
for (i = 0; i < NUM_CQS; i++) {
cq = &priv->cq[i]; //Passing on the 2 cqs.
if (cq->is_rx) {
err = mtnic_process_rx_cq(priv, cq->dev, cq);
if (err) {
priv->state = CARD_DOWN;
eprintf(" Error allocating RX buffers\n");
return;
}
} else {
mtnic_process_tx_cq(priv, cq->dev, cq);
}
}
++ priv->poll_counter;
}
static int
mtnic_transmit( struct net_device *dev, struct io_buffer *iobuf )
{
struct mtnic_priv *priv = netdev_priv(dev);
struct mtnic_ring *ring;
struct mtnic_tx_desc *tx_desc;
struct mtnic_data_seg *data;
u32 index;
/* In case of an error then return */
if (priv->state != CARD_UP)
return MTNIC_ERROR;
ring = &priv->tx_ring;
index = ring->prod & ring->size_mask;
if ((ring->prod - ring->cons) >= ring->size) {
DBG("No space left for descriptors!!! cons: %lx prod: %lx\n",
ring->cons, ring->prod);
mdelay(5);
return MTNIC_ERROR;/* no space left */
}
/* get current descriptor */
tx_desc = ring->buf + (index * sizeof(struct mtnic_tx_desc));
/* Prepare ctrl segement */
tx_desc->ctrl.size_vlan = cpu_to_be32(2);
tx_desc->ctrl.flags = cpu_to_be32(MTNIC_BIT_TX_COMP |
MTNIC_BIT_NO_ICRC);
tx_desc->ctrl.op_own = cpu_to_be32(MTNIC_OPCODE_SEND) |
((ring->prod & ring->size) ?
cpu_to_be32(MTNIC_BIT_DESC_OWN) : 0);
/* Prepare Data Seg */
data = &tx_desc->data;
data->addr_l = cpu_to_be32((u32)virt_to_bus(iobuf->data));
data->count = cpu_to_be32(iob_len(iobuf));
data->mem_type = priv->fw.mem_type_snoop_be;
/* Attach io_buffer */
ring->iobuf[index] = iobuf;
/* Update producer index */
++ring->prod;
/* Ring doorbell! */
wmb();
writel((u32) ring->db_offset, &ring->txcq_db->send_db);
return 0;
}
static void
mtnic_close(struct net_device *dev)
{
struct mtnic_priv *priv = netdev_priv(dev);
int err = 0;
DBG("Close called for port:%d\n", priv->port);
if (priv->state == CARD_UP) {
/* Disable port */
err |= mtnic_SET_PORT_STATE(priv, priv->port, 0);
/*
* Stop HW associated with this port
*/
mdelay(5);
/* Stop RX */
err |= mtnic_RELEASE_RESOURCE(priv, priv->port,
MTNIC_IF_RESOURCE_TYPE_RX_RING, 0);
/* Stop TX */
err |= mtnic_RELEASE_RESOURCE(priv, priv->port,
MTNIC_IF_RESOURCE_TYPE_TX_RING, 0);
/* Stop CQs */
err |= mtnic_RELEASE_RESOURCE(priv, priv->port,
MTNIC_IF_RESOURCE_TYPE_CQ, 0);
err |= mtnic_RELEASE_RESOURCE(priv, priv->port,
MTNIC_IF_RESOURCE_TYPE_CQ, 1);
if (err) {
DBG("Close reported error %d", err);
}
/* Free memory */
free(priv->tx_ring.buf);
iounmap(priv->tx_ring.txcq_db);
free(priv->cq[1].buf);
free(priv->cq[1].db);
/* Free RX buffers */
mtnic_free_io_buffers(&priv->rx_ring);
free(priv->rx_ring.buf);
free(priv->rx_ring.db);
free(priv->cq[0].buf);
free(priv->cq[0].db);
priv->state = CARD_INITIALIZED;
}
}
static void
mtnic_disable(struct pci_device *pci)
{
int err;
struct net_device *dev = pci_get_drvdata(pci);
struct mtnic_priv *priv = netdev_priv(dev);
/* Should NOT happen! but just in case */
if (priv->state == CARD_UP)
mtnic_close(dev);
if (priv->state == CARD_INITIALIZED) {
err = mtnic_RELEASE_RESOURCE(priv, 0,
MTNIC_IF_RESOURCE_TYPE_EQ, 0);
DBG("Calling MTNIC_CLOSE command\n");
err |= mtnic_cmd(priv, NULL, NULL, 0,
MTNIC_IF_CMD_CLOSE_NIC);
if (err) {
DBG("Error Releasing resources %d\n", err);
}
free(priv->cmd.buf);
iounmap(priv->hcr);
ufree((u32)priv->fw.fw_pages.buf);
ufree((u32)priv->fw.extra_pages.buf);
free(priv->eq.buf);
iounmap(priv->eq_db);
priv->state = CARD_DOWN;
}
unregister_netdev(dev);
netdev_nullify(dev);
netdev_put(dev);
}
static void
mtnic_irq(struct net_device *netdev __unused, int enable __unused)
{
/* Not implemented */
}
/** mtnic net device operations */
static struct net_device_operations mtnic_operations = {
.open = mtnic_open,
.close = mtnic_close,
.transmit = mtnic_transmit,
.poll = mtnic_poll,
.irq = mtnic_irq,
};
static int
mtnic_probe(struct pci_device *pci,
const struct pci_device_id *id __unused)
{
struct net_device *dev;
struct mtnic_priv *priv;
int err;
u64 mac;
u32 result = 0;
void *dev_id;
int i;
if (pci->vendor != MELLANOX_VENDOR_ID) {
eprintf("");
return 0;
}
printf("\nMellanox Technologies LTD - Boot over MTNIC implementaion\n");
adjust_pci_device(pci);
err = mtnic_init_pci(pci);
if (err) {
eprintf("Error in pci_init\n");
return MTNIC_ERROR;
}
mtnic_reset();
mdelay(1000);
err = restore_config();
if (err) {
eprintf("");
return err;
}
/* Checking MTNIC device ID */
dev_id = ioremap(mtnic_pci_dev.dev.bar[0] +
MTNIC_DEVICE_ID_OFFSET, 4);
result = ntohl(readl(dev_id));
iounmap(dev_id);
if (result != MTNIC_DEVICE_ID) {
eprintf("Wrong Devie ID (0x%lx) !!!", result);
return MTNIC_ERROR;
}
/* Initializing net device */
dev = alloc_etherdev(sizeof(struct mtnic_priv));
if (dev == NULL) {
eprintf("Net device allocation failed\n");
return MTNIC_ERROR;
}
/*
* Initialize driver private data
*/
priv = netdev_priv(dev);
memset(priv, 0, sizeof(struct mtnic_priv));
priv->dev = dev;
priv->pdev = pci;
priv->dev->dev = &pci->dev;
/* Attach pci device */
pci_set_drvdata(pci, priv->dev);
netdev_init(dev, &mtnic_operations);
/* Initialize hardware */
err = mtnic_init_card(dev);
if (err) {
eprintf("Error in init_card\n");
return MTNIC_ERROR;
}
/* Program the MAC address */
mac = priv->fw.mac[priv->port];
printf("Port %d Mac address: 0x%12llx\n", MTNIC_PORT_NUM + 1, mac);
for (i = 0;i < MAC_ADDRESS_SIZE; ++i) {
dev->ll_addr[MAC_ADDRESS_SIZE - i - 1] = mac & 0xFF;
mac = mac >> 8;
}
if (register_netdev(dev)) {
eprintf("Netdev registration failed\n");
return MTNIC_ERROR;
}
return 0;
}
static struct pci_device_id mtnic_nics[] = {
PCI_ROM(0x15b3, 0x6368, "mtnic", "Mellanox MTNIC driver"),
};
struct pci_driver mtnic_driver __pci_driver = {
.ids = mtnic_nics,
.id_count = sizeof(mtnic_nics) / sizeof(mtnic_nics[0]),
.probe = mtnic_probe,
.remove = mtnic_disable,
};
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