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linuxdebug/drivers/scsi/isci/init.c

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null pointer error
2024-07-16 15:50:57 +02:00
/*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* BSD LICENSE
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
* All rights reserved.
*
* 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.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/firmware.h>
#include <linux/efi.h>
#include <asm/string.h>
#include <scsi/scsi_host.h>
#include "host.h"
#include "isci.h"
#include "task.h"
#include "probe_roms.h"
#define MAJ 1
#define MIN 2
#define BUILD 0
#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \
__stringify(BUILD)
MODULE_VERSION(DRV_VERSION);
static struct scsi_transport_template *isci_transport_template;
static const struct pci_device_id isci_id_table[] = {
{ PCI_VDEVICE(INTEL, 0x1D61),},
{ PCI_VDEVICE(INTEL, 0x1D63),},
{ PCI_VDEVICE(INTEL, 0x1D65),},
{ PCI_VDEVICE(INTEL, 0x1D67),},
{ PCI_VDEVICE(INTEL, 0x1D69),},
{ PCI_VDEVICE(INTEL, 0x1D6B),},
{ PCI_VDEVICE(INTEL, 0x1D60),},
{ PCI_VDEVICE(INTEL, 0x1D62),},
{ PCI_VDEVICE(INTEL, 0x1D64),},
{ PCI_VDEVICE(INTEL, 0x1D66),},
{ PCI_VDEVICE(INTEL, 0x1D68),},
{ PCI_VDEVICE(INTEL, 0x1D6A),},
{}
};
MODULE_DEVICE_TABLE(pci, isci_id_table);
/* linux isci specific settings */
unsigned char no_outbound_task_to = 2;
module_param(no_outbound_task_to, byte, 0);
MODULE_PARM_DESC(no_outbound_task_to, "No Outbound Task Timeout (1us incr)");
u16 ssp_max_occ_to = 20;
module_param(ssp_max_occ_to, ushort, 0);
MODULE_PARM_DESC(ssp_max_occ_to, "SSP Max occupancy timeout (100us incr)");
u16 stp_max_occ_to = 5;
module_param(stp_max_occ_to, ushort, 0);
MODULE_PARM_DESC(stp_max_occ_to, "STP Max occupancy timeout (100us incr)");
u16 ssp_inactive_to = 5;
module_param(ssp_inactive_to, ushort, 0);
MODULE_PARM_DESC(ssp_inactive_to, "SSP inactivity timeout (100us incr)");
u16 stp_inactive_to = 5;
module_param(stp_inactive_to, ushort, 0);
MODULE_PARM_DESC(stp_inactive_to, "STP inactivity timeout (100us incr)");
unsigned char phy_gen = SCIC_SDS_PARM_GEN2_SPEED;
module_param(phy_gen, byte, 0);
MODULE_PARM_DESC(phy_gen, "PHY generation (1: 1.5Gbps 2: 3.0Gbps 3: 6.0Gbps)");
unsigned char max_concurr_spinup;
module_param(max_concurr_spinup, byte, 0);
MODULE_PARM_DESC(max_concurr_spinup, "Max concurrent device spinup");
uint cable_selection_override = CABLE_OVERRIDE_DISABLED;
module_param(cable_selection_override, uint, 0);
MODULE_PARM_DESC(cable_selection_override,
"This field indicates length of the SAS/SATA cable between "
"host and device. If any bits > 15 are set (default) "
"indicates \"use platform defaults\"");
static ssize_t isci_show_id(struct device *dev, struct device_attribute *attr, char *buf)
{
struct Scsi_Host *shost = container_of(dev, typeof(*shost), shost_dev);
struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
struct isci_host *ihost = container_of(sas_ha, typeof(*ihost), sas_ha);
return snprintf(buf, PAGE_SIZE, "%d\n", ihost->id);
}
static DEVICE_ATTR(isci_id, S_IRUGO, isci_show_id, NULL);
static struct attribute *isci_host_attrs[] = {
&dev_attr_isci_id.attr,
NULL
};
ATTRIBUTE_GROUPS(isci_host);
static struct scsi_host_template isci_sht = {
.module = THIS_MODULE,
.name = DRV_NAME,
.proc_name = DRV_NAME,
.queuecommand = sas_queuecommand,
.dma_need_drain = ata_scsi_dma_need_drain,
.target_alloc = sas_target_alloc,
.slave_configure = sas_slave_configure,
.scan_finished = isci_host_scan_finished,
.scan_start = isci_host_start,
.change_queue_depth = sas_change_queue_depth,
.bios_param = sas_bios_param,
.can_queue = ISCI_CAN_QUEUE_VAL,
.this_id = -1,
.sg_tablesize = SG_ALL,
.max_sectors = SCSI_DEFAULT_MAX_SECTORS,
.eh_abort_handler = sas_eh_abort_handler,
.eh_device_reset_handler = sas_eh_device_reset_handler,
.eh_target_reset_handler = sas_eh_target_reset_handler,
.slave_alloc = sas_slave_alloc,
.target_destroy = sas_target_destroy,
.ioctl = sas_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = sas_ioctl,
#endif
.shost_groups = isci_host_groups,
.track_queue_depth = 1,
};
static struct sas_domain_function_template isci_transport_ops = {
/* The class calls these to notify the LLDD of an event. */
.lldd_port_formed = isci_port_formed,
.lldd_port_deformed = isci_port_deformed,
/* The class calls these when a device is found or gone. */
.lldd_dev_found = isci_remote_device_found,
.lldd_dev_gone = isci_remote_device_gone,
.lldd_execute_task = isci_task_execute_task,
/* Task Management Functions. Must be called from process context. */
.lldd_abort_task = isci_task_abort_task,
.lldd_abort_task_set = isci_task_abort_task_set,
.lldd_clear_task_set = isci_task_clear_task_set,
.lldd_I_T_nexus_reset = isci_task_I_T_nexus_reset,
.lldd_lu_reset = isci_task_lu_reset,
.lldd_query_task = isci_task_query_task,
/* ata recovery called from ata-eh */
.lldd_ata_check_ready = isci_ata_check_ready,
/* Port and Adapter management */
.lldd_clear_nexus_port = isci_task_clear_nexus_port,
.lldd_clear_nexus_ha = isci_task_clear_nexus_ha,
/* Phy management */
.lldd_control_phy = isci_phy_control,
/* GPIO support */
.lldd_write_gpio = isci_gpio_write,
};
/******************************************************************************
* P R O T E C T E D M E T H O D S
******************************************************************************/
/**
* isci_register_sas_ha() - This method initializes various lldd
* specific members of the sas_ha struct and calls the libsas
* sas_register_ha() function.
* @isci_host: This parameter specifies the lldd specific wrapper for the
* libsas sas_ha struct.
*
* This method returns an error code indicating success or failure. The user
* should check for possible memory allocation error return otherwise, a zero
* indicates success.
*/
static int isci_register_sas_ha(struct isci_host *isci_host)
{
int i;
struct sas_ha_struct *sas_ha = &(isci_host->sas_ha);
struct asd_sas_phy **sas_phys;
struct asd_sas_port **sas_ports;
sas_phys = devm_kcalloc(&isci_host->pdev->dev,
SCI_MAX_PHYS, sizeof(void *),
GFP_KERNEL);
if (!sas_phys)
return -ENOMEM;
sas_ports = devm_kcalloc(&isci_host->pdev->dev,
SCI_MAX_PORTS, sizeof(void *),
GFP_KERNEL);
if (!sas_ports)
return -ENOMEM;
sas_ha->sas_ha_name = DRV_NAME;
sas_ha->lldd_module = THIS_MODULE;
sas_ha->sas_addr = &isci_host->phys[0].sas_addr[0];
for (i = 0; i < SCI_MAX_PHYS; i++) {
sas_phys[i] = &isci_host->phys[i].sas_phy;
sas_ports[i] = &isci_host->sas_ports[i];
}
sas_ha->sas_phy = sas_phys;
sas_ha->sas_port = sas_ports;
sas_ha->num_phys = SCI_MAX_PHYS;
sas_ha->strict_wide_ports = 1;
sas_register_ha(sas_ha);
return 0;
}
static void isci_unregister(struct isci_host *isci_host)
{
struct Scsi_Host *shost;
if (!isci_host)
return;
shost = to_shost(isci_host);
sas_unregister_ha(&isci_host->sas_ha);
sas_remove_host(shost);
scsi_host_put(shost);
}
static int isci_pci_init(struct pci_dev *pdev)
{
int err, bar_num, bar_mask = 0;
void __iomem * const *iomap;
err = pcim_enable_device(pdev);
if (err) {
dev_err(&pdev->dev,
"failed enable PCI device %s!\n",
pci_name(pdev));
return err;
}
for (bar_num = 0; bar_num < SCI_PCI_BAR_COUNT; bar_num++)
bar_mask |= 1 << (bar_num * 2);
err = pcim_iomap_regions(pdev, bar_mask, DRV_NAME);
if (err)
return err;
iomap = pcim_iomap_table(pdev);
if (!iomap)
return -ENOMEM;
pci_set_master(pdev);
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
if (err)
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
return err;
}
static int num_controllers(struct pci_dev *pdev)
{
/* bar size alone can tell us if we are running with a dual controller
* part, no need to trust revision ids that might be under broken firmware
* control
*/
resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2);
resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2);
if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS &&
smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS)
return SCI_MAX_CONTROLLERS;
else
return 1;
}
static int isci_setup_interrupts(struct pci_dev *pdev)
{
int err, i, num_msix;
struct isci_host *ihost;
struct isci_pci_info *pci_info = to_pci_info(pdev);
/*
* Determine the number of vectors associated with this
* PCI function.
*/
num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT;
err = pci_alloc_irq_vectors(pdev, num_msix, num_msix, PCI_IRQ_MSIX);
if (err < 0)
goto intx;
for (i = 0; i < num_msix; i++) {
int id = i / SCI_NUM_MSI_X_INT;
irq_handler_t isr;
ihost = pci_info->hosts[id];
/* odd numbered vectors are error interrupts */
if (i & 1)
isr = isci_error_isr;
else
isr = isci_msix_isr;
err = devm_request_irq(&pdev->dev, pci_irq_vector(pdev, i),
isr, 0, DRV_NAME"-msix", ihost);
if (!err)
continue;
dev_info(&pdev->dev, "msix setup failed falling back to intx\n");
while (i--) {
id = i / SCI_NUM_MSI_X_INT;
ihost = pci_info->hosts[id];
devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i),
ihost);
}
pci_free_irq_vectors(pdev);
goto intx;
}
return 0;
intx:
for_each_isci_host(i, ihost, pdev) {
err = devm_request_irq(&pdev->dev, pci_irq_vector(pdev, 0),
isci_intx_isr, IRQF_SHARED, DRV_NAME"-intx",
ihost);
if (err)
break;
}
return err;
}
static void isci_user_parameters_get(struct sci_user_parameters *u)
{
int i;
for (i = 0; i < SCI_MAX_PHYS; i++) {
struct sci_phy_user_params *u_phy = &u->phys[i];
u_phy->max_speed_generation = phy_gen;
/* we are not exporting these for now */
u_phy->align_insertion_frequency = 0x7f;
u_phy->in_connection_align_insertion_frequency = 0xff;
u_phy->notify_enable_spin_up_insertion_frequency = 0x33;
}
u->stp_inactivity_timeout = stp_inactive_to;
u->ssp_inactivity_timeout = ssp_inactive_to;
u->stp_max_occupancy_timeout = stp_max_occ_to;
u->ssp_max_occupancy_timeout = ssp_max_occ_to;
u->no_outbound_task_timeout = no_outbound_task_to;
u->max_concurr_spinup = max_concurr_spinup;
}
static enum sci_status sci_user_parameters_set(struct isci_host *ihost,
struct sci_user_parameters *sci_parms)
{
u16 index;
/*
* Validate the user parameters. If they are not legal, then
* return a failure.
*/
for (index = 0; index < SCI_MAX_PHYS; index++) {
struct sci_phy_user_params *u;
u = &sci_parms->phys[index];
if (!((u->max_speed_generation <= SCIC_SDS_PARM_MAX_SPEED) &&
(u->max_speed_generation > SCIC_SDS_PARM_NO_SPEED)))
return SCI_FAILURE_INVALID_PARAMETER_VALUE;
if ((u->in_connection_align_insertion_frequency < 3) ||
(u->align_insertion_frequency == 0) ||
(u->notify_enable_spin_up_insertion_frequency == 0))
return SCI_FAILURE_INVALID_PARAMETER_VALUE;
}
if ((sci_parms->stp_inactivity_timeout == 0) ||
(sci_parms->ssp_inactivity_timeout == 0) ||
(sci_parms->stp_max_occupancy_timeout == 0) ||
(sci_parms->ssp_max_occupancy_timeout == 0) ||
(sci_parms->no_outbound_task_timeout == 0))
return SCI_FAILURE_INVALID_PARAMETER_VALUE;
memcpy(&ihost->user_parameters, sci_parms, sizeof(*sci_parms));
return SCI_SUCCESS;
}
static void sci_oem_defaults(struct isci_host *ihost)
{
/* these defaults are overridden by the platform / firmware */
struct sci_user_parameters *user = &ihost->user_parameters;
struct sci_oem_params *oem = &ihost->oem_parameters;
int i;
/* Default to APC mode. */
oem->controller.mode_type = SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE;
/* Default to APC mode. */
oem->controller.max_concurr_spin_up = 1;
/* Default to no SSC operation. */
oem->controller.do_enable_ssc = false;
/* Default to short cables on all phys. */
oem->controller.cable_selection_mask = 0;
/* Initialize all of the port parameter information to narrow ports. */
for (i = 0; i < SCI_MAX_PORTS; i++)
oem->ports[i].phy_mask = 0;
/* Initialize all of the phy parameter information. */
for (i = 0; i < SCI_MAX_PHYS; i++) {
/* Default to 3G (i.e. Gen 2). */
user->phys[i].max_speed_generation = SCIC_SDS_PARM_GEN2_SPEED;
/* the frequencies cannot be 0 */
user->phys[i].align_insertion_frequency = 0x7f;
user->phys[i].in_connection_align_insertion_frequency = 0xff;
user->phys[i].notify_enable_spin_up_insertion_frequency = 0x33;
/* Previous Vitesse based expanders had a arbitration issue that
* is worked around by having the upper 32-bits of SAS address
* with a value greater then the Vitesse company identifier.
* Hence, usage of 0x5FCFFFFF.
*/
oem->phys[i].sas_address.low = 0x1 + ihost->id;
oem->phys[i].sas_address.high = 0x5FCFFFFF;
}
user->stp_inactivity_timeout = 5;
user->ssp_inactivity_timeout = 5;
user->stp_max_occupancy_timeout = 5;
user->ssp_max_occupancy_timeout = 20;
user->no_outbound_task_timeout = 2;
}
static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id)
{
struct isci_orom *orom = to_pci_info(pdev)->orom;
struct sci_user_parameters sci_user_params;
u8 oem_version = ISCI_ROM_VER_1_0;
struct isci_host *ihost;
struct Scsi_Host *shost;
int err, i;
ihost = devm_kzalloc(&pdev->dev, sizeof(*ihost), GFP_KERNEL);
if (!ihost)
return NULL;
ihost->pdev = pdev;
ihost->id = id;
spin_lock_init(&ihost->scic_lock);
init_waitqueue_head(&ihost->eventq);
ihost->sas_ha.dev = &ihost->pdev->dev;
ihost->sas_ha.lldd_ha = ihost;
tasklet_init(&ihost->completion_tasklet,
isci_host_completion_routine, (unsigned long)ihost);
/* validate module parameters */
/* TODO: kill struct sci_user_parameters and reference directly */
sci_oem_defaults(ihost);
isci_user_parameters_get(&sci_user_params);
if (sci_user_parameters_set(ihost, &sci_user_params)) {
dev_warn(&pdev->dev,
"%s: sci_user_parameters_set failed\n", __func__);
return NULL;
}
/* sanity check platform (or 'firmware') oem parameters */
if (orom) {
if (id < 0 || id >= SCI_MAX_CONTROLLERS || id > orom->hdr.num_elements) {
dev_warn(&pdev->dev, "parsing firmware oem parameters failed\n");
return NULL;
}
ihost->oem_parameters = orom->ctrl[id];
oem_version = orom->hdr.version;
}
/* validate oem parameters (platform, firmware, or built-in defaults) */
if (sci_oem_parameters_validate(&ihost->oem_parameters, oem_version)) {
dev_warn(&pdev->dev, "oem parameter validation failed\n");
return NULL;
}
for (i = 0; i < SCI_MAX_PORTS; i++) {
struct isci_port *iport = &ihost->ports[i];
INIT_LIST_HEAD(&iport->remote_dev_list);
iport->isci_host = ihost;
}
for (i = 0; i < SCI_MAX_PHYS; i++)
isci_phy_init(&ihost->phys[i], ihost, i);
for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) {
struct isci_remote_device *idev = &ihost->devices[i];
INIT_LIST_HEAD(&idev->node);
}
shost = scsi_host_alloc(&isci_sht, sizeof(void *));
if (!shost)
return NULL;
dev_info(&pdev->dev, "%sSCU controller %d: phy 3-0 cables: "
"{%s, %s, %s, %s}\n",
(is_cable_select_overridden() ? "* " : ""), ihost->id,
lookup_cable_names(decode_cable_selection(ihost, 3)),
lookup_cable_names(decode_cable_selection(ihost, 2)),
lookup_cable_names(decode_cable_selection(ihost, 1)),
lookup_cable_names(decode_cable_selection(ihost, 0)));
err = isci_host_init(ihost);
if (err)
goto err_shost;
SHOST_TO_SAS_HA(shost) = &ihost->sas_ha;
ihost->sas_ha.core.shost = shost;
shost->transportt = isci_transport_template;
shost->max_id = ~0;
shost->max_lun = ~0;
shost->max_cmd_len = MAX_COMMAND_SIZE;
/* turn on DIF support */
scsi_host_set_prot(shost,
SHOST_DIF_TYPE1_PROTECTION |
SHOST_DIF_TYPE2_PROTECTION |
SHOST_DIF_TYPE3_PROTECTION);
scsi_host_set_guard(shost, SHOST_DIX_GUARD_CRC);
err = scsi_add_host(shost, &pdev->dev);
if (err)
goto err_shost;
err = isci_register_sas_ha(ihost);
if (err)
goto err_shost_remove;
return ihost;
err_shost_remove:
scsi_remove_host(shost);
err_shost:
scsi_host_put(shost);
return NULL;
}
static int isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct isci_pci_info *pci_info;
int err, i;
struct isci_host *isci_host;
const struct firmware *fw = NULL;
struct isci_orom *orom = NULL;
char *source = "(platform)";
dev_info(&pdev->dev, "driver configured for rev: %d silicon\n",
pdev->revision);
pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL);
if (!pci_info)
return -ENOMEM;
pci_set_drvdata(pdev, pci_info);
if (efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
orom = isci_get_efi_var(pdev);
if (!orom)
orom = isci_request_oprom(pdev);
for (i = 0; orom && i < num_controllers(pdev); i++) {
if (sci_oem_parameters_validate(&orom->ctrl[i],
orom->hdr.version)) {
dev_warn(&pdev->dev,
"[%d]: invalid oem parameters detected, falling back to firmware\n", i);
orom = NULL;
break;
}
}
if (!orom) {
source = "(firmware)";
orom = isci_request_firmware(pdev, fw);
if (!orom) {
/* TODO convert this to WARN_TAINT_ONCE once the
* orom/efi parameter support is widely available
*/
dev_warn(&pdev->dev,
"Loading user firmware failed, using default "
"values\n");
dev_warn(&pdev->dev,
"Default OEM configuration being used: 4 "
"narrow ports, and default SAS Addresses\n");
}
}
if (orom)
dev_info(&pdev->dev,
"OEM SAS parameters (version: %u.%u) loaded %s\n",
(orom->hdr.version & 0xf0) >> 4,
(orom->hdr.version & 0xf), source);
pci_info->orom = orom;
err = isci_pci_init(pdev);
if (err)
return err;
for (i = 0; i < num_controllers(pdev); i++) {
struct isci_host *h = isci_host_alloc(pdev, i);
if (!h) {
err = -ENOMEM;
goto err_host_alloc;
}
pci_info->hosts[i] = h;
}
err = isci_setup_interrupts(pdev);
if (err)
goto err_host_alloc;
for_each_isci_host(i, isci_host, pdev)
scsi_scan_host(to_shost(isci_host));
return 0;
err_host_alloc:
for_each_isci_host(i, isci_host, pdev)
isci_unregister(isci_host);
return err;
}
static void isci_pci_remove(struct pci_dev *pdev)
{
struct isci_host *ihost;
int i;
for_each_isci_host(i, ihost, pdev) {
wait_for_start(ihost);
isci_unregister(ihost);
isci_host_deinit(ihost);
}
}
#ifdef CONFIG_PM_SLEEP
static int isci_suspend(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct isci_host *ihost;
int i;
for_each_isci_host(i, ihost, pdev) {
sas_suspend_ha(&ihost->sas_ha);
isci_host_deinit(ihost);
}
return 0;
}
static int isci_resume(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct isci_host *ihost;
int i;
for_each_isci_host(i, ihost, pdev) {
sas_prep_resume_ha(&ihost->sas_ha);
isci_host_init(ihost);
isci_host_start(ihost->sas_ha.core.shost);
wait_for_start(ihost);
sas_resume_ha(&ihost->sas_ha);
}
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(isci_pm_ops, isci_suspend, isci_resume);
static struct pci_driver isci_pci_driver = {
.name = DRV_NAME,
.id_table = isci_id_table,
.probe = isci_pci_probe,
.remove = isci_pci_remove,
.driver.pm = &isci_pm_ops,
};
static __init int isci_init(void)
{
int err;
pr_info("%s: Intel(R) C600 SAS Controller Driver - version %s\n",
DRV_NAME, DRV_VERSION);
isci_transport_template = sas_domain_attach_transport(&isci_transport_ops);
if (!isci_transport_template)
return -ENOMEM;
err = pci_register_driver(&isci_pci_driver);
if (err)
sas_release_transport(isci_transport_template);
return err;
}
static __exit void isci_exit(void)
{
pci_unregister_driver(&isci_pci_driver);
sas_release_transport(isci_transport_template);
}
MODULE_LICENSE("Dual BSD/GPL");
MODULE_FIRMWARE(ISCI_FW_NAME);
module_init(isci_init);
module_exit(isci_exit);