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linux_dsm_epyc7002/drivers/scsi/csiostor/csio_init.c
Praveen Madhavan 3fb4c22eaa csiostor:Remove T4 FCoE Support. 
We found a subtle issue with FCoE on T4 very late in the game
and decided not to productize FCoE on T4 and therefore there
are no customers that will be impacted by this change. Hence
T4 FCoE support is removed. FCoE supported only on T5 cards.

changes in v2:
  - Make the commit message more clearer.

Signed-off-by: Praveen Madhavan <praveenm@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-19 15:30:02 -05:00

1259 lines
29 KiB
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/*
* 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/aer.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)
{
struct dentry *de;
de = debugfs_create_file(name, S_IRUSR, hw->debugfs_root,
(void *)hw + idx, &csio_mem_debugfs_fops);
if (de && de->d_inode)
de->d_inode->i_size = 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 int
csio_dfs_destroy(struct csio_hw *hw)
{
if (hw->debugfs_root)
debugfs_remove_recursive(hw->debugfs_root);
return 0;
}
/*
* csio_dfs_init - Debug filesystem initialization for the module.
*
*/
static int
csio_dfs_init(void)
{
csio_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
if (!csio_debugfs_root)
pr_warn("Could not create debugfs entry, continuing\n");
return 0;
}
/*
* 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);
if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
} else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
} else {
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);
flush_scheduled_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_pci_pool = pci_pool_create("csio_scsi_pci_pool", hw->pdev,
CSIO_SCSI_RSP_LEN, 8, 0);
if (!hw->scsi_pci_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)
{
pci_pool_destroy(hw->scsi_pci_pool);
hw->scsi_pci_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;
strncpy(hw->drv_version, CSIO_DRV_VERSION, 32);
/* 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_nocache(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?
* @os_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(shost, 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 cards */
if (!csio_is_t5((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;
}
pci_set_drvdata(pdev, hw);
if (csio_hw_start(hw) != 0) {
dev_err(&pdev->dev,
"Failed to start FW, continuing in debug mode.\n");
return 0;
}
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);
pci_cleanup_aer_uncorrect_error_status(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 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,
.driver = {
.owner = THIS_MODULE,
},
.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(CSIO_DRV_LICENSE);
MODULE_DEVICE_TABLE(pci, csio_pci_tbl);
MODULE_VERSION(CSIO_DRV_VERSION);
MODULE_FIRMWARE(FW_FNAME_T5);
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