/*
* This file is part of the Chelsio FCoE driver for Linux.
*
* Copyright (c) 2008-2012 Chelsio Communications, Inc. 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/mm.h>
#include <linux/notifier.h>
#include <linux/kdebug.h>
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <linux/string.h>
#include <linux/export.h>
#include "csio_init.h"
#include "csio_defs.h"
#define CSIO_MIN_MEMPOOL_SZ 64
static struct dentry *csio_debugfs_root;
static struct scsi_transport_template *csio_fcoe_transport;
static struct scsi_transport_template *csio_fcoe_transport_vport;
/*
* debugfs support
*/
static ssize_t
csio_mem_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
{
loff_t pos = *ppos;
loff_t avail = file_inode(file)->i_size;
unsigned int mem = (uintptr_t)file->private_data & 3;
struct csio_hw *hw = file->private_data - mem;
if (pos < 0)
return -EINVAL;
if (pos >= avail)
return 0;
if (count > avail - pos)
count = avail - pos;
while (count) {
size_t len;
int ret, ofst;
__be32 data[16];
if (mem == MEM_MC)
ret = hw->chip_ops->chip_mc_read(hw, 0, pos,
data, NULL);
else
ret = hw->chip_ops->chip_edc_read(hw, mem, pos,
data, NULL);
if (ret)
return ret;
ofst = pos % sizeof(data);
len = min(count, sizeof(data) - ofst);
if (copy_to_user(buf, (u8 *)data + ofst, len))
return -EFAULT;
buf += len;
pos += len;
count -= len;
}
count = pos - *ppos;
*ppos = pos;
return count;
}
static const struct file_operations csio_mem_debugfs_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = csio_mem_read,
.llseek = default_llseek,
};
void csio_add_debugfs_mem(struct csio_hw *hw, const char *name,
unsigned int idx, unsigned int size_mb)
{
debugfs_create_file_size(name, S_IRUSR, hw->debugfs_root,
(void *)hw + idx, &csio_mem_debugfs_fops,
size_mb << 20);
}
static int csio_setup_debugfs(struct csio_hw *hw)
{
int i;
if (IS_ERR_OR_NULL(hw->debugfs_root))
return -1;
i = csio_rd_reg32(hw, MA_TARGET_MEM_ENABLE_A);
if (i & EDRAM0_ENABLE_F)
csio_add_debugfs_mem(hw, "edc0", MEM_EDC0, 5);
if (i & EDRAM1_ENABLE_F)
csio_add_debugfs_mem(hw, "edc1", MEM_EDC1, 5);
hw->chip_ops->chip_dfs_create_ext_mem(hw);
return 0;
}
/*
* csio_dfs_create - Creates and sets up per-hw debugfs.
*
*/
static int
csio_dfs_create(struct csio_hw *hw)
{
if (csio_debugfs_root) {
hw->debugfs_root = debugfs_create_dir(pci_name(hw->pdev),
csio_debugfs_root);
csio_setup_debugfs(hw);
}
return 0;
}
/*
* csio_dfs_destroy - Destroys per-hw debugfs.
*/
static void
csio_dfs_destroy(struct csio_hw *hw)
{
debugfs_remove_recursive(hw->debugfs_root);
}
/*
* csio_dfs_init - Debug filesystem initialization for the module.
*
*/
static void
csio_dfs_init(void)
{
csio_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
}
/*
* csio_dfs_exit - debugfs cleanup for the module.
*/
static void
csio_dfs_exit(void)
{
debugfs_remove(csio_debugfs_root);
}
/*
* csio_pci_init - PCI initialization.
* @pdev: PCI device.
* @bars: Bitmask of bars to be requested.
*
* Initializes the PCI function by enabling MMIO, setting bus
* mastership and setting DMA mask.
*/
static int
csio_pci_init(struct pci_dev *pdev, int *bars)
{
int rv = -ENODEV;
*bars = pci_select_bars(pdev, IORESOURCE_MEM);
if (pci_enable_device_mem(pdev))
goto err;
if (pci_request_selected_regions(pdev, *bars, KBUILD_MODNAME))
goto err_disable_device;
pci_set_master(pdev);
pci_try_set_mwi(pdev);
rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
if (rv)
rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (rv) {
rv = -ENODEV;
dev_err(&pdev->dev, "No suitable DMA available.\n");
goto err_release_regions;
}
return 0;
err_release_regions:
pci_release_selected_regions(pdev, *bars);
err_disable_device:
pci_disable_device(pdev);
err:
return rv;
}
/*
* csio_pci_exit - PCI unitialization.
* @pdev: PCI device.
* @bars: Bars to be released.
*
*/
static void
csio_pci_exit(struct pci_dev *pdev, int *bars)
{
pci_release_selected_regions(pdev, *bars);
pci_disable_device(pdev);
}
/*
* csio_hw_init_workers - Initialize the HW module's worker threads.
* @hw: HW module.
*
*/
static void
csio_hw_init_workers(struct csio_hw *hw)
{
INIT_WORK(&hw->evtq_work, csio_evtq_worker);
}
static void
csio_hw_exit_workers(struct csio_hw *hw)
{
cancel_work_sync(&hw->evtq_work);
}
static int
csio_create_queues(struct csio_hw *hw)
{
int i, j;
struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
int rv;
struct csio_scsi_cpu_info *info;
if (hw->flags & CSIO_HWF_Q_FW_ALLOCED)
return 0;
if (hw->intr_mode != CSIO_IM_MSIX) {
rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx,
0, hw->pport[0].portid, false, NULL);
if (rv != 0) {
csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv);
return rv;
}
}
/* FW event queue */
rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx,
csio_get_fwevt_intr_idx(hw),
hw->pport[0].portid, true, NULL);
if (rv != 0) {
csio_err(hw, "FW event IQ config failed!: %d\n", rv);
return rv;
}
/* Create mgmt queue */
rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx,
mgmtm->iq_idx, hw->pport[0].portid, NULL);
if (rv != 0) {
csio_err(hw, "Mgmt EQ create failed!: %d\n", rv);
goto err;
}
/* Create SCSI queues */
for (i = 0; i < hw->num_pports; i++) {
info = &hw->scsi_cpu_info[i];
for (j = 0; j < info->max_cpus; j++) {
struct csio_scsi_qset *sqset = &hw->sqset[i][j];
rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx,
sqset->intr_idx, i, false, NULL);
if (rv != 0) {
csio_err(hw,
"SCSI module IQ config failed [%d][%d]:%d\n",
i, j, rv);
goto err;
}
rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx,
sqset->iq_idx, i, NULL);
if (rv != 0) {
csio_err(hw,
"SCSI module EQ config failed [%d][%d]:%d\n",
i, j, rv);
goto err;
}
} /* for all CPUs */
} /* For all ports */
hw->flags |= CSIO_HWF_Q_FW_ALLOCED;
return 0;
err:
csio_wr_destroy_queues(hw, true);
return -EINVAL;
}
/*
* csio_config_queues - Configure the DMA queues.
* @hw: HW module.
*
* Allocates memory for queues are registers them with FW.
*/
int
csio_config_queues(struct csio_hw *hw)
{
int i, j, idx, k = 0;
int rv;
struct csio_scsi_qset *sqset;
struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
struct csio_scsi_qset *orig;
struct csio_scsi_cpu_info *info;
if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED)
return csio_create_queues(hw);
/* Calculate number of SCSI queues for MSIX we would like */
hw->num_scsi_msix_cpus = num_online_cpus();
hw->num_sqsets = num_online_cpus() * hw->num_pports;
if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) {
hw->num_sqsets = CSIO_MAX_SCSI_QSETS;
hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU;
}
/* Initialize max_cpus, may get reduced during msix allocations */
for (i = 0; i < hw->num_pports; i++)
hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus;
csio_dbg(hw, "nsqsets:%d scpus:%d\n",
hw->num_sqsets, hw->num_scsi_msix_cpus);
csio_intr_enable(hw);
if (hw->intr_mode != CSIO_IM_MSIX) {
/* Allocate Forward interrupt iq. */
hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE,
CSIO_INTR_WRSIZE, CSIO_INGRESS,
(void *)hw, 0, 0, NULL);
if (hw->intr_iq_idx == -1) {
csio_err(hw,
"Forward interrupt queue creation failed\n");
goto intr_disable;
}
}
/* Allocate the FW evt queue */
hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE,
CSIO_FWEVT_WRSIZE,
CSIO_INGRESS, (void *)hw,
CSIO_FWEVT_FLBUFS, 0,
csio_fwevt_intx_handler);
if (hw->fwevt_iq_idx == -1) {
csio_err(hw, "FW evt queue creation failed\n");
goto intr_disable;
}
/* Allocate the mgmt queue */
mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE,
CSIO_MGMT_EQ_WRSIZE,
CSIO_EGRESS, (void *)hw, 0, 0, NULL);
if (mgmtm->eq_idx == -1) {
csio_err(hw, "Failed to alloc egress queue for mgmt module\n");
goto intr_disable;
}
/* Use FW IQ for MGMT req completion */
mgmtm->iq_idx = hw->fwevt_iq_idx;
/* Allocate SCSI queues */
for (i = 0; i < hw->num_pports; i++) {
info = &hw->scsi_cpu_info[i];
for (j = 0; j < hw->num_scsi_msix_cpus; j++) {
sqset = &hw->sqset[i][j];
if (j >= info->max_cpus) {
k = j % info->max_cpus;
orig = &hw->sqset[i][k];
sqset->eq_idx = orig->eq_idx;
sqset->iq_idx = orig->iq_idx;
continue;
}
idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0,
CSIO_EGRESS, (void *)hw, 0, 0,
NULL);
if (idx == -1) {
csio_err(hw, "EQ creation failed for idx:%d\n",
idx);
goto intr_disable;
}
sqset->eq_idx = idx;
idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE,
CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS,
(void *)hw, 0, 0,
csio_scsi_intx_handler);
if (idx == -1) {
csio_err(hw, "IQ creation failed for idx:%d\n",
idx);
goto intr_disable;
}
sqset->iq_idx = idx;
} /* for all CPUs */
} /* For all ports */
hw->flags |= CSIO_HWF_Q_MEM_ALLOCED;
rv = csio_create_queues(hw);
if (rv != 0)
goto intr_disable;
/*
* Now request IRQs for the vectors. In the event of a failure,
* cleanup is handled internally by this function.
*/
rv = csio_request_irqs(hw);
if (rv != 0)
return -EINVAL;
return 0;
intr_disable:
csio_intr_disable(hw, false);
return -EINVAL;
}
static int
csio_resource_alloc(struct csio_hw *hw)
{
struct csio_wrm *wrm = csio_hw_to_wrm(hw);
int rv = -ENOMEM;
wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ +
CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ);
hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ,
sizeof(struct csio_mb));
if (!hw->mb_mempool)
goto err;
hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ,
sizeof(struct csio_rnode));
if (!hw->rnode_mempool)
goto err_free_mb_mempool;
hw->scsi_dma_pool = dma_pool_create("csio_scsi_dma_pool",
&hw->pdev->dev, CSIO_SCSI_RSP_LEN,
8, 0);
if (!hw->scsi_dma_pool)
goto err_free_rn_pool;
return 0;
err_free_rn_pool:
mempool_destroy(hw->rnode_mempool);
hw->rnode_mempool = NULL;
err_free_mb_mempool:
mempool_destroy(hw->mb_mempool);
hw->mb_mempool = NULL;
err:
return rv;
}
static void
csio_resource_free(struct csio_hw *hw)
{
dma_pool_destroy(hw->scsi_dma_pool);
hw->scsi_dma_pool = NULL;
mempool_destroy(hw->rnode_mempool);
hw->rnode_mempool = NULL;
mempool_destroy(hw->mb_mempool);
hw->mb_mempool = NULL;
}
/*
* csio_hw_alloc - Allocate and initialize the HW module.
* @pdev: PCI device.
*
* Allocates HW structure, DMA, memory resources, maps BARS to
* host memory and initializes HW module.
*/
static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev)
{
struct csio_hw *hw;
hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL);
if (!hw)
goto err;
hw->pdev = pdev;
strscpy(hw->drv_version, CSIO_DRV_VERSION,
sizeof(hw->drv_version));
/* memory pool/DMA pool allocation */
if (csio_resource_alloc(hw))
goto err_free_hw;
/* Get the start address of registers from BAR 0 */
hw->regstart = ioremap(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0));
if (!hw->regstart) {
csio_err(hw, "Could not map BAR 0, regstart = %p\n",
hw->regstart);
goto err_resource_free;
}
csio_hw_init_workers(hw);
if (csio_hw_init(hw))
goto err_unmap_bar;
csio_dfs_create(hw);
csio_dbg(hw, "hw:%p\n", hw);
return hw;
err_unmap_bar:
csio_hw_exit_workers(hw);
iounmap(hw->regstart);
err_resource_free:
csio_resource_free(hw);
err_free_hw:
kfree(hw);
err:
return NULL;
}
/*
* csio_hw_free - Uninitialize and free the HW module.
* @hw: The HW module
*
* Disable interrupts, uninit the HW module, free resources, free hw.
*/
static void
csio_hw_free(struct csio_hw *hw)
{
csio_intr_disable(hw, true);
csio_hw_exit_workers(hw);
csio_hw_exit(hw);
iounmap(hw->regstart);
csio_dfs_destroy(hw);
csio_resource_free(hw);
kfree(hw);
}
/**
* csio_shost_init - Create and initialize the lnode module.
* @hw: The HW module.
* @dev: The device associated with this invocation.
* @probe: Called from probe context or not?
* @pln: Parent lnode if any.
*
* Allocates lnode structure via scsi_host_alloc, initializes
* shost, initializes lnode module and registers with SCSI ML
* via scsi_host_add. This function is shared between physical and
* virtual node ports.
*/
struct csio_lnode *
csio_shost_init(struct csio_hw *hw, struct device *dev,
bool probe, struct csio_lnode *pln)
{
struct Scsi_Host *shost = NULL;
struct csio_lnode *ln;
csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth;
csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth;
/*
* hw->pdev is the physical port's PCI dev structure,
* which will be different from the NPIV dev structure.
*/
if (dev == &hw->pdev->dev)
shost = scsi_host_alloc(
&csio_fcoe_shost_template,
sizeof(struct csio_lnode));
else
shost = scsi_host_alloc(
&csio_fcoe_shost_vport_template,
sizeof(struct csio_lnode));
if (!shost)
goto err;
ln = shost_priv(shost);
memset(ln, 0, sizeof(struct csio_lnode));
/* Link common lnode to this lnode */
ln->dev_num = (shost->host_no << 16);
shost->can_queue = CSIO_MAX_QUEUE;
shost->this_id = -1;
shost->unique_id = shost->host_no;
shost->max_cmd_len = 16; /* Max CDB length supported */
shost->max_id = min_t(uint32_t, csio_fcoe_rnodes,
hw->fres_info.max_ssns);
shost->max_lun = CSIO_MAX_LUN;
if (dev == &hw->pdev->dev)
shost->transportt = csio_fcoe_transport;
else
shost->transportt = csio_fcoe_transport_vport;
/* root lnode */
if (!hw->rln)
hw->rln = ln;
/* Other initialization here: Common, Transport specific */
if (csio_lnode_init(ln, hw, pln))
goto err_shost_put;
if (scsi_add_host_with_dma(shost, dev, &hw->pdev->dev))
goto err_lnode_exit;
return ln;
err_lnode_exit:
csio_lnode_exit(ln);
err_shost_put:
scsi_host_put(shost);
err:
return NULL;
}
/**
* csio_shost_exit - De-instantiate the shost.
* @ln: The lnode module corresponding to the shost.
*
*/
void
csio_shost_exit(struct csio_lnode *ln)
{
struct Scsi_Host *shost = csio_ln_to_shost(ln);
struct csio_hw *hw = csio_lnode_to_hw(ln);
/* Inform transport */
fc_remove_host(shost);
/* Inform SCSI ML */
scsi_remove_host(shost);
/* Flush all the events, so that any rnode removal events
* already queued are all handled, before we remove the lnode.
*/
spin_lock_irq(&hw->lock);
csio_evtq_flush(hw);
spin_unlock_irq(&hw->lock);
csio_lnode_exit(ln);
scsi_host_put(shost);
}
struct csio_lnode *
csio_lnode_alloc(struct csio_hw *hw)
{
return csio_shost_init(hw, &hw->pdev->dev, false, NULL);
}
void
csio_lnodes_block_request(struct csio_hw *hw)
{
struct Scsi_Host *shost;
struct csio_lnode *sln;
struct csio_lnode *ln;
struct list_head *cur_ln, *cur_cln;
struct csio_lnode **lnode_list;
int cur_cnt = 0, ii;
lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
GFP_KERNEL);
if (!lnode_list) {
csio_err(hw, "Failed to allocate lnodes_list");
return;
}
spin_lock_irq(&hw->lock);
/* Traverse sibling lnodes */
list_for_each(cur_ln, &hw->sln_head) {
sln = (struct csio_lnode *) cur_ln;
lnode_list[cur_cnt++] = sln;
/* Traverse children lnodes */
list_for_each(cur_cln, &sln->cln_head)
lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
}
spin_unlock_irq(&hw->lock);
for (ii = 0; ii < cur_cnt; ii++) {
csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
ln = lnode_list[ii];
shost = csio_ln_to_shost(ln);
scsi_block_requests(shost);
}
kfree(lnode_list);
}
void
csio_lnodes_unblock_request(struct csio_hw *hw)
{
struct csio_lnode *ln;
struct Scsi_Host *shost;
struct csio_lnode *sln;
struct list_head *cur_ln, *cur_cln;
struct csio_lnode **lnode_list;
int cur_cnt = 0, ii;
lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
GFP_KERNEL);
if (!lnode_list) {
csio_err(hw, "Failed to allocate lnodes_list");
return;
}
spin_lock_irq(&hw->lock);
/* Traverse sibling lnodes */
list_for_each(cur_ln, &hw->sln_head) {
sln = (struct csio_lnode *) cur_ln;
lnode_list[cur_cnt++] = sln;
/* Traverse children lnodes */
list_for_each(cur_cln, &sln->cln_head)
lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
}
spin_unlock_irq(&hw->lock);
for (ii = 0; ii < cur_cnt; ii++) {
csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
ln = lnode_list[ii];
shost = csio_ln_to_shost(ln);
scsi_unblock_requests(shost);
}
kfree(lnode_list);
}
void
csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid)
{
struct csio_lnode *ln;
struct Scsi_Host *shost;
struct csio_lnode *sln;
struct list_head *cur_ln, *cur_cln;
struct csio_lnode **lnode_list;
int cur_cnt = 0, ii;
lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
GFP_KERNEL);
if (!lnode_list) {
csio_err(hw, "Failed to allocate lnodes_list");
return;
}
spin_lock_irq(&hw->lock);
/* Traverse sibling lnodes */
list_for_each(cur_ln, &hw->sln_head) {
sln = (struct csio_lnode *) cur_ln;
if (sln->portid != portid)
continue;
lnode_list[cur_cnt++] = sln;
/* Traverse children lnodes */
list_for_each(cur_cln, &sln->cln_head)
lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
}
spin_unlock_irq(&hw->lock);
for (ii = 0; ii < cur_cnt; ii++) {
csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
ln = lnode_list[ii];
shost = csio_ln_to_shost(ln);
scsi_block_requests(shost);
}
kfree(lnode_list);
}
void
csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid)
{
struct csio_lnode *ln;
struct Scsi_Host *shost;
struct csio_lnode *sln;
struct list_head *cur_ln, *cur_cln;
struct csio_lnode **lnode_list;
int cur_cnt = 0, ii;
lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
GFP_KERNEL);
if (!lnode_list) {
csio_err(hw, "Failed to allocate lnodes_list");
return;
}
spin_lock_irq(&hw->lock);
/* Traverse sibling lnodes */
list_for_each(cur_ln, &hw->sln_head) {
sln = (struct csio_lnode *) cur_ln;
if (sln->portid != portid)
continue;
lnode_list[cur_cnt++] = sln;
/* Traverse children lnodes */
list_for_each(cur_cln, &sln->cln_head)
lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
}
spin_unlock_irq(&hw->lock);
for (ii = 0; ii < cur_cnt; ii++) {
csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
ln = lnode_list[ii];
shost = csio_ln_to_shost(ln);
scsi_unblock_requests(shost);
}
kfree(lnode_list);
}
void
csio_lnodes_exit(struct csio_hw *hw, bool npiv)
{
struct csio_lnode *sln;
struct csio_lnode *ln;
struct list_head *cur_ln, *cur_cln;
struct csio_lnode **lnode_list;
int cur_cnt = 0, ii;
lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
GFP_KERNEL);
if (!lnode_list) {
csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n");
return;
}
/* Get all child lnodes(NPIV ports) */
spin_lock_irq(&hw->lock);
list_for_each(cur_ln, &hw->sln_head) {
sln = (struct csio_lnode *) cur_ln;
/* Traverse children lnodes */
list_for_each(cur_cln, &sln->cln_head)
lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
}
spin_unlock_irq(&hw->lock);
/* Delete NPIV lnodes */
for (ii = 0; ii < cur_cnt; ii++) {
csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]);
ln = lnode_list[ii];
fc_vport_terminate(ln->fc_vport);
}
/* Delete only npiv lnodes */
if (npiv)
goto free_lnodes;
cur_cnt = 0;
/* Get all physical lnodes */
spin_lock_irq(&hw->lock);
/* Traverse sibling lnodes */
list_for_each(cur_ln, &hw->sln_head) {
sln = (struct csio_lnode *) cur_ln;
lnode_list[cur_cnt++] = sln;
}
spin_unlock_irq(&hw->lock);
/* Delete physical lnodes */
for (ii = 0; ii < cur_cnt; ii++) {
csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]);
csio_shost_exit(lnode_list[ii]);
}
free_lnodes:
kfree(lnode_list);
}
/*
* csio_lnode_init_post: Set lnode attributes after starting HW.
* @ln: lnode.
*
*/
static void
csio_lnode_init_post(struct csio_lnode *ln)
{
struct Scsi_Host *shost = csio_ln_to_shost(ln);
csio_fchost_attr_init(ln);
scsi_scan_host(shost);
}
/*
* csio_probe_one - Instantiate this function.
* @pdev: PCI device
* @id: Device ID
*
* This is the .probe() callback of the driver. This function:
* - Initializes the PCI function by enabling MMIO, setting bus
* mastership and setting DMA mask.
* - Allocates HW structure, DMA, memory resources, maps BARS to
* host memory and initializes HW module.
* - Allocates lnode structure via scsi_host_alloc, initializes
* shost, initialized lnode module and registers with SCSI ML
* via scsi_host_add.
* - Enables interrupts, and starts the chip by kicking off the
* HW state machine.
* - Once hardware is ready, initiated scan of the host via
* scsi_scan_host.
*/
static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
int rv;
int bars;
int i;
struct csio_hw *hw;
struct csio_lnode *ln;
/* probe only T5 and T6 cards */
if (!csio_is_t5((pdev->device & CSIO_HW_CHIP_MASK)) &&
!csio_is_t6((pdev->device & CSIO_HW_CHIP_MASK)))
return -ENODEV;
rv = csio_pci_init(pdev, &bars);
if (rv)
goto err;
hw = csio_hw_alloc(pdev);
if (!hw) {
rv = -ENODEV;
goto err_pci_exit;
}
if (!pcie_relaxed_ordering_enabled(pdev))
hw->flags |= CSIO_HWF_ROOT_NO_RELAXED_ORDERING;
pci_set_drvdata(pdev, hw);
rv = csio_hw_start(hw);
if (rv) {
if (rv == -EINVAL) {
dev_err(&pdev->dev,
"Failed to start FW, continuing in debug mode.\n");
return 0;
}
goto err_lnode_exit;
}
sprintf(hw->fwrev_str, "%u.%u.%u.%u\n",
FW_HDR_FW_VER_MAJOR_G(hw->fwrev),
FW_HDR_FW_VER_MINOR_G(hw->fwrev),
FW_HDR_FW_VER_MICRO_G(hw->fwrev),
FW_HDR_FW_VER_BUILD_G(hw->fwrev));
for (i = 0; i < hw->num_pports; i++) {
ln = csio_shost_init(hw, &pdev->dev, true, NULL);
if (!ln) {
rv = -ENODEV;
break;
}
/* Initialize portid */
ln->portid = hw->pport[i].portid;
spin_lock_irq(&hw->lock);
if (csio_lnode_start(ln) != 0)
rv = -ENODEV;
spin_unlock_irq(&hw->lock);
if (rv)
break;
csio_lnode_init_post(ln);
}
if (rv)
goto err_lnode_exit;
return 0;
err_lnode_exit:
csio_lnodes_block_request(hw);
spin_lock_irq(&hw->lock);
csio_hw_stop(hw);
spin_unlock_irq(&hw->lock);
csio_lnodes_unblock_request(hw);
csio_lnodes_exit(hw, 0);
csio_hw_free(hw);
err_pci_exit:
csio_pci_exit(pdev, &bars);
err:
dev_err(&pdev->dev, "probe of device failed: %d\n", rv);
return rv;
}
/*
* csio_remove_one - Remove one instance of the driver at this PCI function.
* @pdev: PCI device
*
* Used during hotplug operation.
*/
static void csio_remove_one(struct pci_dev *pdev)
{
struct csio_hw *hw = pci_get_drvdata(pdev);
int bars = pci_select_bars(pdev, IORESOURCE_MEM);
csio_lnodes_block_request(hw);
spin_lock_irq(&hw->lock);
/* Stops lnode, Rnode s/m
* Quiesce IOs.
* All sessions with remote ports are unregistered.
*/
csio_hw_stop(hw);
spin_unlock_irq(&hw->lock);
csio_lnodes_unblock_request(hw);
csio_lnodes_exit(hw, 0);
csio_hw_free(hw);
csio_pci_exit(pdev, &bars);
}
/*
* csio_pci_error_detected - PCI error was detected
* @pdev: PCI device
*
*/
static pci_ers_result_t
csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
{
struct csio_hw *hw = pci_get_drvdata(pdev);
csio_lnodes_block_request(hw);
spin_lock_irq(&hw->lock);
/* Post PCI error detected evt to HW s/m
* HW s/m handles this evt by quiescing IOs, unregisters rports
* and finally takes the device to offline.
*/
csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED);
spin_unlock_irq(&hw->lock);
csio_lnodes_unblock_request(hw);
csio_lnodes_exit(hw, 0);
csio_intr_disable(hw, true);
pci_disable_device(pdev);
return state == pci_channel_io_perm_failure ?
PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET;
}
/*
* csio_pci_slot_reset - PCI slot has been reset.
* @pdev: PCI device
*
*/
static pci_ers_result_t
csio_pci_slot_reset(struct pci_dev *pdev)
{
struct csio_hw *hw = pci_get_drvdata(pdev);
int ready;
if (pci_enable_device(pdev)) {
dev_err(&pdev->dev, "cannot re-enable device in slot reset\n");
return PCI_ERS_RESULT_DISCONNECT;
}
pci_set_master(pdev);
pci_restore_state(pdev);
pci_save_state(pdev);
/* Bring HW s/m to ready state.
* but don't resume IOs.
*/
spin_lock_irq(&hw->lock);
csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET);
ready = csio_is_hw_ready(hw);
spin_unlock_irq(&hw->lock);
if (ready) {
return PCI_ERS_RESULT_RECOVERED;
} else {
dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n");
return PCI_ERS_RESULT_DISCONNECT;
}
}
/*
* csio_pci_resume - Resume normal operations
* @pdev: PCI device
*
*/
static void
csio_pci_resume(struct pci_dev *pdev)
{
struct csio_hw *hw = pci_get_drvdata(pdev);
struct csio_lnode *ln;
int rv = 0;
int i;
/* Bring the LINK UP and Resume IO */
for (i = 0; i < hw->num_pports; i++) {
ln = csio_shost_init(hw, &pdev->dev, true, NULL);
if (!ln) {
rv = -ENODEV;
break;
}
/* Initialize portid */
ln->portid = hw->pport[i].portid;
spin_lock_irq(&hw->lock);
if (csio_lnode_start(ln) != 0)
rv = -ENODEV;
spin_unlock_irq(&hw->lock);
if (rv)
break;
csio_lnode_init_post(ln);
}
if (rv)
goto err_resume_exit;
return;
err_resume_exit:
csio_lnodes_block_request(hw);
spin_lock_irq(&hw->lock);
csio_hw_stop(hw);
spin_unlock_irq(&hw->lock);
csio_lnodes_unblock_request(hw);
csio_lnodes_exit(hw, 0);
csio_hw_free(hw);
dev_err(&pdev->dev, "resume of device failed: %d\n", rv);
}
static struct pci_error_handlers csio_err_handler = {
.error_detected = csio_pci_error_detected,
.slot_reset = csio_pci_slot_reset,
.resume = csio_pci_resume,
};
/*
* Macros needed to support the PCI Device ID Table ...
*/
#define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \
static const struct pci_device_id csio_pci_tbl[] = {
/* Define for FCoE uses PF6 */
#define CH_PCI_DEVICE_ID_FUNCTION 0x6
#define CH_PCI_ID_TABLE_ENTRY(devid) \
{ PCI_VDEVICE(CHELSIO, (devid)), 0 }
#define CH_PCI_DEVICE_ID_TABLE_DEFINE_END { 0, } }
#include "t4_pci_id_tbl.h"
static struct pci_driver csio_pci_driver = {
.name = KBUILD_MODNAME,
.id_table = csio_pci_tbl,
.probe = csio_probe_one,
.remove = csio_remove_one,
.err_handler = &csio_err_handler,
};
/*
* csio_init - Chelsio storage driver initialization function.
*
*/
static int __init
csio_init(void)
{
int rv = -ENOMEM;
pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION);
csio_dfs_init();
csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs);
if (!csio_fcoe_transport)
goto err;
csio_fcoe_transport_vport =
fc_attach_transport(&csio_fc_transport_vport_funcs);
if (!csio_fcoe_transport_vport)
goto err_vport;
rv = pci_register_driver(&csio_pci_driver);
if (rv)
goto err_pci;
return 0;
err_pci:
fc_release_transport(csio_fcoe_transport_vport);
err_vport:
fc_release_transport(csio_fcoe_transport);
err:
csio_dfs_exit();
return rv;
}
/*
* csio_exit - Chelsio storage driver uninitialization .
*
* Function that gets called in the unload path.
*/
static void __exit
csio_exit(void)
{
pci_unregister_driver(&csio_pci_driver);
csio_dfs_exit();
fc_release_transport(csio_fcoe_transport_vport);
fc_release_transport(csio_fcoe_transport);
}
module_init(csio_init);
module_exit(csio_exit);
MODULE_AUTHOR(CSIO_DRV_AUTHOR);
MODULE_DESCRIPTION(CSIO_DRV_DESC);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DEVICE_TABLE(pci, csio_pci_tbl);
MODULE_VERSION(CSIO_DRV_VERSION);
MODULE_FIRMWARE(FW_FNAME_T5);
MODULE_FIRMWARE(FW_FNAME_T6);
MODULE_SOFTDEP("pre: cxgb4");
Codebase Browser
linux