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linux_dsm_epyc7002/drivers/scsi/esas2r/esas2r_main.c
Christoph Hellwig efc3c1df5f scsi: remove ->change_queue_type method 
Since we got rid of ordered tag support in 2010 the prime use case of
switching on and off ordered tags has been obsolete.  The other function
of enabling/disabling tagging entirely has only been correctly implemented
by the 53c700 driver and isn't generally useful.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com
Reviewed-by: Hannes Reinecke <hare@suse.de>
2014-12-04 09:55:45 +01:00

1976 lines
48 KiB
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/*
* linux/drivers/scsi/esas2r/esas2r_main.c
* For use with ATTO ExpressSAS R6xx SAS/SATA RAID controllers
*
* Copyright (c) 2001-2013 ATTO Technology, Inc.
* (mailto:linuxdrivers@attotech.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* 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.
*
* NO WARRANTY
* THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
* LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
* solely responsible for determining the appropriateness of using and
* distributing the Program and assumes all risks associated with its
* exercise of rights under this Agreement, including but not limited to
* the risks and costs of program errors, damage to or loss of data,
* programs or equipment, and unavailability or interruption of operations.
*
* DISCLAIMER OF LIABILITY
* NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), 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 OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
* HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
#include "esas2r.h"
MODULE_DESCRIPTION(ESAS2R_DRVR_NAME ": " ESAS2R_LONGNAME " driver");
MODULE_AUTHOR("ATTO Technology, Inc.");
MODULE_LICENSE("GPL");
MODULE_VERSION(ESAS2R_VERSION_STR);
/* global definitions */
static int found_adapters;
struct esas2r_adapter *esas2r_adapters[MAX_ADAPTERS];
#define ESAS2R_VDA_EVENT_PORT1 54414
#define ESAS2R_VDA_EVENT_PORT2 54415
#define ESAS2R_VDA_EVENT_SOCK_COUNT 2
static struct esas2r_adapter *esas2r_adapter_from_kobj(struct kobject *kobj)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct Scsi_Host *host = class_to_shost(dev);
return (struct esas2r_adapter *)host->hostdata;
}
static ssize_t read_fw(struct file *file, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
return esas2r_read_fw(a, buf, off, count);
}
static ssize_t write_fw(struct file *file, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
return esas2r_write_fw(a, buf, off, count);
}
static ssize_t read_fs(struct file *file, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
return esas2r_read_fs(a, buf, off, count);
}
static ssize_t write_fs(struct file *file, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
int length = min(sizeof(struct esas2r_ioctl_fs), count);
int result = 0;
result = esas2r_write_fs(a, buf, off, count);
if (result < 0)
result = 0;
return length;
}
static ssize_t read_vda(struct file *file, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
return esas2r_read_vda(a, buf, off, count);
}
static ssize_t write_vda(struct file *file, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
return esas2r_write_vda(a, buf, off, count);
}
static ssize_t read_live_nvram(struct file *file, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
int length = min_t(size_t, sizeof(struct esas2r_sas_nvram), PAGE_SIZE);
memcpy(buf, a->nvram, length);
return length;
}
static ssize_t write_live_nvram(struct file *file, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
struct esas2r_request *rq;
int result = -EFAULT;
rq = esas2r_alloc_request(a);
if (rq == NULL)
return -ENOMEM;
if (esas2r_write_params(a, rq, (struct esas2r_sas_nvram *)buf))
result = count;
esas2r_free_request(a, rq);
return result;
}
static ssize_t read_default_nvram(struct file *file, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
esas2r_nvram_get_defaults(a, (struct esas2r_sas_nvram *)buf);
return sizeof(struct esas2r_sas_nvram);
}
static ssize_t read_hw(struct file *file, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
int length = min_t(size_t, sizeof(struct atto_ioctl), PAGE_SIZE);
if (!a->local_atto_ioctl)
return -ENOMEM;
if (handle_hba_ioctl(a, a->local_atto_ioctl) != IOCTL_SUCCESS)
return -ENOMEM;
memcpy(buf, a->local_atto_ioctl, length);
return length;
}
static ssize_t write_hw(struct file *file, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
int length = min(sizeof(struct atto_ioctl), count);
if (!a->local_atto_ioctl) {
a->local_atto_ioctl = kzalloc(sizeof(struct atto_ioctl),
GFP_KERNEL);
if (a->local_atto_ioctl == NULL) {
esas2r_log(ESAS2R_LOG_WARN,
"write_hw kzalloc failed for %d bytes",
sizeof(struct atto_ioctl));
return -ENOMEM;
}
}
memset(a->local_atto_ioctl, 0, sizeof(struct atto_ioctl));
memcpy(a->local_atto_ioctl, buf, length);
return length;
}
#define ESAS2R_RW_BIN_ATTR(_name) \
struct bin_attribute bin_attr_ ## _name = { \
.attr = \
{ .name = __stringify(_name), .mode = S_IRUSR | S_IWUSR }, \
.size = 0, \
.read = read_ ## _name, \
.write = write_ ## _name }
ESAS2R_RW_BIN_ATTR(fw);
ESAS2R_RW_BIN_ATTR(fs);
ESAS2R_RW_BIN_ATTR(vda);
ESAS2R_RW_BIN_ATTR(hw);
ESAS2R_RW_BIN_ATTR(live_nvram);
struct bin_attribute bin_attr_default_nvram = {
.attr = { .name = "default_nvram", .mode = S_IRUGO },
.size = 0,
.read = read_default_nvram,
.write = NULL
};
static struct scsi_host_template driver_template = {
.module = THIS_MODULE,
.show_info = esas2r_show_info,
.name = ESAS2R_LONGNAME,
.release = esas2r_release,
.info = esas2r_info,
.ioctl = esas2r_ioctl,
.queuecommand = esas2r_queuecommand,
.eh_abort_handler = esas2r_eh_abort,
.eh_device_reset_handler = esas2r_device_reset,
.eh_bus_reset_handler = esas2r_bus_reset,
.eh_host_reset_handler = esas2r_host_reset,
.eh_target_reset_handler = esas2r_target_reset,
.can_queue = 128,
.this_id = -1,
.sg_tablesize = SCSI_MAX_SG_SEGMENTS,
.cmd_per_lun =
ESAS2R_DEFAULT_CMD_PER_LUN,
.present = 0,
.unchecked_isa_dma = 0,
.use_clustering = ENABLE_CLUSTERING,
.emulated = 0,
.proc_name = ESAS2R_DRVR_NAME,
.change_queue_depth = scsi_change_queue_depth,
.max_sectors = 0xFFFF,
.use_blk_tags = 1,
};
int sgl_page_size = 512;
module_param(sgl_page_size, int, 0);
MODULE_PARM_DESC(sgl_page_size,
"Scatter/gather list (SGL) page size in number of S/G "
"entries. If your application is doing a lot of very large "
"transfers, you may want to increase the SGL page size. "
"Default 512.");
int num_sg_lists = 1024;
module_param(num_sg_lists, int, 0);
MODULE_PARM_DESC(num_sg_lists,
"Number of scatter/gather lists. Default 1024.");
int sg_tablesize = SCSI_MAX_SG_SEGMENTS;
module_param(sg_tablesize, int, 0);
MODULE_PARM_DESC(sg_tablesize,
"Maximum number of entries in a scatter/gather table.");
int num_requests = 256;
module_param(num_requests, int, 0);
MODULE_PARM_DESC(num_requests,
"Number of requests. Default 256.");
int num_ae_requests = 4;
module_param(num_ae_requests, int, 0);
MODULE_PARM_DESC(num_ae_requests,
"Number of VDA asynchromous event requests. Default 4.");
int cmd_per_lun = ESAS2R_DEFAULT_CMD_PER_LUN;
module_param(cmd_per_lun, int, 0);
MODULE_PARM_DESC(cmd_per_lun,
"Maximum number of commands per LUN. Default "
DEFINED_NUM_TO_STR(ESAS2R_DEFAULT_CMD_PER_LUN) ".");
int can_queue = 128;
module_param(can_queue, int, 0);
MODULE_PARM_DESC(can_queue,
"Maximum number of commands per adapter. Default 128.");
int esas2r_max_sectors = 0xFFFF;
module_param(esas2r_max_sectors, int, 0);
MODULE_PARM_DESC(esas2r_max_sectors,
"Maximum number of disk sectors in a single data transfer. "
"Default 65535 (largest possible setting).");
int interrupt_mode = 1;
module_param(interrupt_mode, int, 0);
MODULE_PARM_DESC(interrupt_mode,
"Defines the interrupt mode to use. 0 for legacy"
", 1 for MSI. Default is MSI (1).");
static struct pci_device_id
esas2r_pci_table[] = {
{ ATTO_VENDOR_ID, 0x0049, ATTO_VENDOR_ID, 0x0049,
0,
0, 0 },
{ ATTO_VENDOR_ID, 0x0049, ATTO_VENDOR_ID, 0x004A,
0,
0, 0 },
{ ATTO_VENDOR_ID, 0x0049, ATTO_VENDOR_ID, 0x004B,
0,
0, 0 },
{ ATTO_VENDOR_ID, 0x0049, ATTO_VENDOR_ID, 0x004C,
0,
0, 0 },
{ ATTO_VENDOR_ID, 0x0049, ATTO_VENDOR_ID, 0x004D,
0,
0, 0 },
{ ATTO_VENDOR_ID, 0x0049, ATTO_VENDOR_ID, 0x004E,
0,
0, 0 },
{ 0, 0, 0, 0,
0,
0, 0 }
};
MODULE_DEVICE_TABLE(pci, esas2r_pci_table);
static int
esas2r_probe(struct pci_dev *pcid, const struct pci_device_id *id);
static void
esas2r_remove(struct pci_dev *pcid);
static struct pci_driver
esas2r_pci_driver = {
.name = ESAS2R_DRVR_NAME,
.id_table = esas2r_pci_table,
.probe = esas2r_probe,
.remove = esas2r_remove,
.suspend = esas2r_suspend,
.resume = esas2r_resume,
};
static int esas2r_probe(struct pci_dev *pcid,
const struct pci_device_id *id)
{
struct Scsi_Host *host = NULL;
struct esas2r_adapter *a;
int err;
size_t host_alloc_size = sizeof(struct esas2r_adapter)
+ ((num_requests) +
1) * sizeof(struct esas2r_request);
esas2r_log_dev(ESAS2R_LOG_DEBG, &(pcid->dev),
"esas2r_probe() 0x%02x 0x%02x 0x%02x 0x%02x",
pcid->vendor,
pcid->device,
pcid->subsystem_vendor,
pcid->subsystem_device);
esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
"before pci_enable_device() "
"enable_cnt: %d",
pcid->enable_cnt.counter);
err = pci_enable_device(pcid);
if (err != 0) {
esas2r_log_dev(ESAS2R_LOG_CRIT, &(pcid->dev),
"pci_enable_device() FAIL (%d)",
err);
return -ENODEV;
}
esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
"pci_enable_device() OK");
esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
"after pci_enable_device() enable_cnt: %d",
pcid->enable_cnt.counter);
host = scsi_host_alloc(&driver_template, host_alloc_size);
if (host == NULL) {
esas2r_log(ESAS2R_LOG_CRIT, "scsi_host_alloc() FAIL");
return -ENODEV;
}
memset(host->hostdata, 0, host_alloc_size);
a = (struct esas2r_adapter *)host->hostdata;
esas2r_log(ESAS2R_LOG_INFO, "scsi_host_alloc() OK host: %p", host);
/* override max LUN and max target id */
host->max_id = ESAS2R_MAX_ID + 1;
host->max_lun = 255;
/* we can handle 16-byte CDbs */
host->max_cmd_len = 16;
host->can_queue = can_queue;
host->cmd_per_lun = cmd_per_lun;
host->this_id = host->max_id + 1;
host->max_channel = 0;
host->unique_id = found_adapters;
host->sg_tablesize = sg_tablesize;
host->max_sectors = esas2r_max_sectors;
/* set to bus master for BIOses that don't do it for us */
esas2r_log(ESAS2R_LOG_INFO, "pci_set_master() called");
pci_set_master(pcid);
if (!esas2r_init_adapter(host, pcid, found_adapters)) {
esas2r_log(ESAS2R_LOG_CRIT,
"unable to initialize device at PCI bus %x:%x",
pcid->bus->number,
pcid->devfn);
esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
"scsi_host_put() called");
scsi_host_put(host);
return 0;
}
esas2r_log(ESAS2R_LOG_INFO, "pci_set_drvdata(%p, %p) called", pcid,
host->hostdata);
pci_set_drvdata(pcid, host);
esas2r_log(ESAS2R_LOG_INFO, "scsi_add_host() called");
err = scsi_add_host(host, &pcid->dev);
if (err) {
esas2r_log(ESAS2R_LOG_CRIT, "scsi_add_host returned %d", err);
esas2r_log_dev(ESAS2R_LOG_CRIT, &(host->shost_gendev),
"scsi_add_host() FAIL");
esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
"scsi_host_put() called");
scsi_host_put(host);
esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
"pci_set_drvdata(%p, NULL) called",
pcid);
pci_set_drvdata(pcid, NULL);
return -ENODEV;
}
esas2r_fw_event_on(a);
esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
"scsi_scan_host() called");
scsi_scan_host(host);
/* Add sysfs binary files */
if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_fw))
esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
"Failed to create sysfs binary file: fw");
else
a->sysfs_fw_created = 1;
if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_fs))
esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
"Failed to create sysfs binary file: fs");
else
a->sysfs_fs_created = 1;
if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_vda))
esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
"Failed to create sysfs binary file: vda");
else
a->sysfs_vda_created = 1;
if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_hw))
esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
"Failed to create sysfs binary file: hw");
else
a->sysfs_hw_created = 1;
if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_live_nvram))
esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
"Failed to create sysfs binary file: live_nvram");
else
a->sysfs_live_nvram_created = 1;
if (sysfs_create_bin_file(&host->shost_dev.kobj,
&bin_attr_default_nvram))
esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
"Failed to create sysfs binary file: default_nvram");
else
a->sysfs_default_nvram_created = 1;
found_adapters++;
return 0;
}
static void esas2r_remove(struct pci_dev *pdev)
{
struct Scsi_Host *host;
int index;
if (pdev == NULL) {
esas2r_log(ESAS2R_LOG_WARN, "esas2r_remove pdev==NULL");
return;
}
host = pci_get_drvdata(pdev);
if (host == NULL) {
/*
* this can happen if pci_set_drvdata was already called
* to clear the host pointer. if this is the case, we
* are okay; this channel has already been cleaned up.
*/
return;
}
esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
"esas2r_remove(%p) called; "
"host:%p", pdev,
host);
index = esas2r_cleanup(host);
if (index < 0)
esas2r_log_dev(ESAS2R_LOG_WARN, &(pdev->dev),
"unknown host in %s",
__func__);
found_adapters--;
/* if this was the last adapter, clean up the rest of the driver */
if (found_adapters == 0)
esas2r_cleanup(NULL);
}
static int __init esas2r_init(void)
{
int i;
esas2r_log(ESAS2R_LOG_INFO, "%s called", __func__);
/* verify valid parameters */
if (can_queue < 1) {
esas2r_log(ESAS2R_LOG_WARN,
"warning: can_queue must be at least 1, value "
"forced.");
can_queue = 1;
} else if (can_queue > 2048) {
esas2r_log(ESAS2R_LOG_WARN,
"warning: can_queue must be no larger than 2048, "
"value forced.");
can_queue = 2048;
}
if (cmd_per_lun < 1) {
esas2r_log(ESAS2R_LOG_WARN,
"warning: cmd_per_lun must be at least 1, value "
"forced.");
cmd_per_lun = 1;
} else if (cmd_per_lun > 2048) {
esas2r_log(ESAS2R_LOG_WARN,
"warning: cmd_per_lun must be no larger than "
"2048, value forced.");
cmd_per_lun = 2048;
}
if (sg_tablesize < 32) {
esas2r_log(ESAS2R_LOG_WARN,
"warning: sg_tablesize must be at least 32, "
"value forced.");
sg_tablesize = 32;
}
if (esas2r_max_sectors < 1) {
esas2r_log(ESAS2R_LOG_WARN,
"warning: esas2r_max_sectors must be at least "
"1, value forced.");
esas2r_max_sectors = 1;
} else if (esas2r_max_sectors > 0xffff) {
esas2r_log(ESAS2R_LOG_WARN,
"warning: esas2r_max_sectors must be no larger "
"than 0xffff, value forced.");
esas2r_max_sectors = 0xffff;
}
sgl_page_size &= ~(ESAS2R_SGL_ALIGN - 1);
if (sgl_page_size < SGL_PG_SZ_MIN)
sgl_page_size = SGL_PG_SZ_MIN;
else if (sgl_page_size > SGL_PG_SZ_MAX)
sgl_page_size = SGL_PG_SZ_MAX;
if (num_sg_lists < NUM_SGL_MIN)
num_sg_lists = NUM_SGL_MIN;
else if (num_sg_lists > NUM_SGL_MAX)
num_sg_lists = NUM_SGL_MAX;
if (num_requests < NUM_REQ_MIN)
num_requests = NUM_REQ_MIN;
else if (num_requests > NUM_REQ_MAX)
num_requests = NUM_REQ_MAX;
if (num_ae_requests < NUM_AE_MIN)
num_ae_requests = NUM_AE_MIN;
else if (num_ae_requests > NUM_AE_MAX)
num_ae_requests = NUM_AE_MAX;
/* set up other globals */
for (i = 0; i < MAX_ADAPTERS; i++)
esas2r_adapters[i] = NULL;
/* initialize */
driver_template.module = THIS_MODULE;
if (pci_register_driver(&esas2r_pci_driver) != 0)
esas2r_log(ESAS2R_LOG_CRIT, "pci_register_driver FAILED");
else
esas2r_log(ESAS2R_LOG_INFO, "pci_register_driver() OK");
if (!found_adapters) {
pci_unregister_driver(&esas2r_pci_driver);
esas2r_cleanup(NULL);
esas2r_log(ESAS2R_LOG_CRIT,
"driver will not be loaded because no ATTO "
"%s devices were found",
ESAS2R_DRVR_NAME);
return -1;
} else {
esas2r_log(ESAS2R_LOG_INFO, "found %d adapters",
found_adapters);
}
return 0;
}
/* Handle ioctl calls to "/proc/scsi/esas2r/ATTOnode" */
static const struct file_operations esas2r_proc_fops = {
.compat_ioctl = esas2r_proc_ioctl,
.unlocked_ioctl = esas2r_proc_ioctl,
};
static struct Scsi_Host *esas2r_proc_host;
static int esas2r_proc_major;
long esas2r_proc_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
{
return esas2r_ioctl_handler(esas2r_proc_host->hostdata,
(int)cmd, (void __user *)arg);
}
static void __exit esas2r_exit(void)
{
esas2r_log(ESAS2R_LOG_INFO, "%s called", __func__);
if (esas2r_proc_major > 0) {
esas2r_log(ESAS2R_LOG_INFO, "unregister proc");
remove_proc_entry(ATTONODE_NAME,
esas2r_proc_host->hostt->proc_dir);
unregister_chrdev(esas2r_proc_major, ESAS2R_DRVR_NAME);
esas2r_proc_major = 0;
}
esas2r_log(ESAS2R_LOG_INFO, "pci_unregister_driver() called");
pci_unregister_driver(&esas2r_pci_driver);
}
int esas2r_show_info(struct seq_file *m, struct Scsi_Host *sh)
{
struct esas2r_adapter *a = (struct esas2r_adapter *)sh->hostdata;
struct esas2r_target *t;
int dev_count = 0;
esas2r_log(ESAS2R_LOG_DEBG, "esas2r_show_info (%p,%d)", m, sh->host_no);
seq_printf(m, ESAS2R_LONGNAME "\n"
"Driver version: "ESAS2R_VERSION_STR "\n"
"Flash version: %s\n"
"Firmware version: %s\n"
"Copyright "ESAS2R_COPYRIGHT_YEARS "\n"
"http://www.attotech.com\n"
"\n",
a->flash_rev,
a->fw_rev[0] ? a->fw_rev : "(none)");
seq_printf(m, "Adapter information:\n"
"--------------------\n"
"Model: %s\n"
"SAS address: %02X%02X%02X%02X:%02X%02X%02X%02X\n",
esas2r_get_model_name(a),
a->nvram->sas_addr[0],
a->nvram->sas_addr[1],
a->nvram->sas_addr[2],
a->nvram->sas_addr[3],
a->nvram->sas_addr[4],
a->nvram->sas_addr[5],
a->nvram->sas_addr[6],
a->nvram->sas_addr[7]);
seq_puts(m, "\n"
"Discovered devices:\n"
"\n"
" # Target ID\n"
"---------------\n");
for (t = a->targetdb; t < a->targetdb_end; t++)
if (t->buffered_target_state == TS_PRESENT) {
seq_printf(m, " %3d %3d\n",
++dev_count,
(u16)(uintptr_t)(t - a->targetdb));
}
if (dev_count == 0)
seq_puts(m, "none\n");
seq_puts(m, "\n");
return 0;
}
int esas2r_release(struct Scsi_Host *sh)
{
esas2r_log_dev(ESAS2R_LOG_INFO, &(sh->shost_gendev),
"esas2r_release() called");
esas2r_cleanup(sh);
if (sh->irq)
free_irq(sh->irq, NULL);
scsi_unregister(sh);
return 0;
}
const char *esas2r_info(struct Scsi_Host *sh)
{
struct esas2r_adapter *a = (struct esas2r_adapter *)sh->hostdata;
static char esas2r_info_str[512];
esas2r_log_dev(ESAS2R_LOG_INFO, &(sh->shost_gendev),
"esas2r_info() called");
/*
* if we haven't done so already, register as a char driver
* and stick a node under "/proc/scsi/esas2r/ATTOnode"
*/
if (esas2r_proc_major <= 0) {
esas2r_proc_host = sh;
esas2r_proc_major = register_chrdev(0, ESAS2R_DRVR_NAME,
&esas2r_proc_fops);
esas2r_log_dev(ESAS2R_LOG_DEBG, &(sh->shost_gendev),
"register_chrdev (major %d)",
esas2r_proc_major);
if (esas2r_proc_major > 0) {
struct proc_dir_entry *pde;
pde = proc_create(ATTONODE_NAME, 0,
sh->hostt->proc_dir,
&esas2r_proc_fops);
if (!pde) {
esas2r_log_dev(ESAS2R_LOG_WARN,
&(sh->shost_gendev),
"failed to create_proc_entry");
esas2r_proc_major = -1;
}
}
}
sprintf(esas2r_info_str,
ESAS2R_LONGNAME " (bus 0x%02X, device 0x%02X, IRQ 0x%02X)"
" driver version: "ESAS2R_VERSION_STR " firmware version: "
"%s\n",
a->pcid->bus->number, a->pcid->devfn, a->pcid->irq,
a->fw_rev[0] ? a->fw_rev : "(none)");
return esas2r_info_str;
}
/* Callback for building a request scatter/gather list */
static u32 get_physaddr_from_sgc(struct esas2r_sg_context *sgc, u64 *addr)
{
u32 len;
if (likely(sgc->cur_offset == sgc->exp_offset)) {
/*
* the normal case: caller used all bytes from previous call, so
* expected offset is the same as the current offset.
*/
if (sgc->sgel_count < sgc->num_sgel) {
/* retrieve next segment, except for first time */
if (sgc->exp_offset > (u8 *)0) {
/* advance current segment */
sgc->cur_sgel = sg_next(sgc->cur_sgel);
++(sgc->sgel_count);
}
len = sg_dma_len(sgc->cur_sgel);
(*addr) = sg_dma_address(sgc->cur_sgel);
/* save the total # bytes returned to caller so far */
sgc->exp_offset += len;
} else {
len = 0;
}
} else if (sgc->cur_offset < sgc->exp_offset) {
/*
* caller did not use all bytes from previous call. need to
* compute the address based on current segment.
*/
len = sg_dma_len(sgc->cur_sgel);
(*addr) = sg_dma_address(sgc->cur_sgel);
sgc->exp_offset -= len;
/* calculate PA based on prev segment address and offsets */
*addr = *addr +
(sgc->cur_offset - sgc->exp_offset);
sgc->exp_offset += len;
/* re-calculate length based on offset */
len = lower_32_bits(
sgc->exp_offset - sgc->cur_offset);
} else { /* if ( sgc->cur_offset > sgc->exp_offset ) */
/*
* we don't expect the caller to skip ahead.
* cur_offset will never exceed the len we return
*/
len = 0;
}
return len;
}
int esas2r_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
{
struct esas2r_adapter *a =
(struct esas2r_adapter *)cmd->device->host->hostdata;
struct esas2r_request *rq;
struct esas2r_sg_context sgc;
unsigned bufflen;
/* Assume success, if it fails we will fix the result later. */
cmd->result = DID_OK << 16;
if (unlikely(test_bit(AF_DEGRADED_MODE, &a->flags))) {
cmd->result = DID_NO_CONNECT << 16;
cmd->scsi_done(cmd);
return 0;
}
rq = esas2r_alloc_request(a);
if (unlikely(rq == NULL)) {
esas2r_debug("esas2r_alloc_request failed");
return SCSI_MLQUEUE_HOST_BUSY;
}
rq->cmd = cmd;
bufflen = scsi_bufflen(cmd);
if (likely(bufflen != 0)) {
if (cmd->sc_data_direction == DMA_TO_DEVICE)
rq->vrq->scsi.flags |= cpu_to_le32(FCP_CMND_WRD);
else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
rq->vrq->scsi.flags |= cpu_to_le32(FCP_CMND_RDD);
}
memcpy(rq->vrq->scsi.cdb, cmd->cmnd, cmd->cmd_len);
rq->vrq->scsi.length = cpu_to_le32(bufflen);
rq->target_id = cmd->device->id;
rq->vrq->scsi.flags |= cpu_to_le32(cmd->device->lun);
rq->sense_buf = cmd->sense_buffer;
rq->sense_len = SCSI_SENSE_BUFFERSIZE;
esas2r_sgc_init(&sgc, a, rq, NULL);
sgc.length = bufflen;
sgc.cur_offset = NULL;
sgc.cur_sgel = scsi_sglist(cmd);
sgc.exp_offset = NULL;
sgc.num_sgel = scsi_dma_map(cmd);
sgc.sgel_count = 0;
if (unlikely(sgc.num_sgel < 0)) {
esas2r_free_request(a, rq);
return SCSI_MLQUEUE_HOST_BUSY;
}
sgc.get_phys_addr = (PGETPHYSADDR)get_physaddr_from_sgc;
if (unlikely(!esas2r_build_sg_list(a, rq, &sgc))) {
scsi_dma_unmap(cmd);
esas2r_free_request(a, rq);
return SCSI_MLQUEUE_HOST_BUSY;
}
esas2r_debug("start request %p to %d:%d\n", rq, (int)cmd->device->id,
(int)cmd->device->lun);
esas2r_start_request(a, rq);
return 0;
}
static void complete_task_management_request(struct esas2r_adapter *a,
struct esas2r_request *rq)
{
(*rq->task_management_status_ptr) = rq->req_stat;
esas2r_free_request(a, rq);
}
/**
* Searches the specified queue for the specified queue for the command
* to abort.
*
* @param [in] a
* @param [in] abort_request
* @param [in] cmd
* t
* @return 0 on failure, 1 if command was not found, 2 if command was found
*/
static int esas2r_check_active_queue(struct esas2r_adapter *a,
struct esas2r_request **abort_request,
struct scsi_cmnd *cmd,
struct list_head *queue)
{
bool found = false;
struct esas2r_request *ar = *abort_request;
struct esas2r_request *rq;
struct list_head *element, *next;
list_for_each_safe(element, next, queue) {
rq = list_entry(element, struct esas2r_request, req_list);
if (rq->cmd == cmd) {
/* Found the request. See what to do with it. */
if (queue == &a->active_list) {
/*
* We are searching the active queue, which
* means that we need to send an abort request
* to the firmware.
*/
ar = esas2r_alloc_request(a);
if (ar == NULL) {
esas2r_log_dev(ESAS2R_LOG_WARN,
&(a->host->shost_gendev),
"unable to allocate an abort request for cmd %p",
cmd);
return 0; /* Failure */
}
/*
* Task management request must be formatted
* with a lock held.
*/
ar->sense_len = 0;
ar->vrq->scsi.length = 0;
ar->target_id = rq->target_id;
ar->vrq->scsi.flags |= cpu_to_le32(
(u8)le32_to_cpu(rq->vrq->scsi.flags));
memset(ar->vrq->scsi.cdb, 0,
sizeof(ar->vrq->scsi.cdb));
ar->vrq->scsi.flags |= cpu_to_le32(
FCP_CMND_TRM);
ar->vrq->scsi.u.abort_handle =
rq->vrq->scsi.handle;
} else {
/*
* The request is pending but not active on
* the firmware. Just free it now and we'll
* report the successful abort below.
*/
list_del_init(&rq->req_list);
esas2r_free_request(a, rq);
}
found = true;
break;
}
}
if (!found)
return 1; /* Not found */
return 2; /* found */
}
int esas2r_eh_abort(struct scsi_cmnd *cmd)
{
struct esas2r_adapter *a =
(struct esas2r_adapter *)cmd->device->host->hostdata;
struct esas2r_request *abort_request = NULL;
unsigned long flags;
struct list_head *queue;
int result;
esas2r_log(ESAS2R_LOG_INFO, "eh_abort (%p)", cmd);
if (test_bit(AF_DEGRADED_MODE, &a->flags)) {
cmd->result = DID_ABORT << 16;
scsi_set_resid(cmd, 0);
cmd->scsi_done(cmd);
return SUCCESS;
}
spin_lock_irqsave(&a->queue_lock, flags);
/*
* Run through the defer and active queues looking for the request
* to abort.
*/
queue = &a->defer_list;
check_active_queue:
result = esas2r_check_active_queue(a, &abort_request, cmd, queue);
if (!result) {
spin_unlock_irqrestore(&a->queue_lock, flags);
return FAILED;
} else if (result == 2 && (queue == &a->defer_list)) {
queue = &a->active_list;
goto check_active_queue;
}
spin_unlock_irqrestore(&a->queue_lock, flags);
if (abort_request) {
u8 task_management_status = RS_PENDING;
/*
* the request is already active, so we need to tell
* the firmware to abort it and wait for the response.
*/
abort_request->comp_cb = complete_task_management_request;
abort_request->task_management_status_ptr =
&task_management_status;
esas2r_start_request(a, abort_request);
if (atomic_read(&a->disable_cnt) == 0)
esas2r_do_deferred_processes(a);
while (task_management_status == RS_PENDING)
msleep(10);
/*
* Once we get here, the original request will have been
* completed by the firmware and the abort request will have
* been cleaned up. we're done!
*/
return SUCCESS;
}
/*
* If we get here, either we found the inactive request and
* freed it, or we didn't find it at all. Either way, success!
*/
cmd->result = DID_ABORT << 16;
scsi_set_resid(cmd, 0);
cmd->scsi_done(cmd);
return SUCCESS;
}
static int esas2r_host_bus_reset(struct scsi_cmnd *cmd, bool host_reset)
{
struct esas2r_adapter *a =
(struct esas2r_adapter *)cmd->device->host->hostdata;
if (test_bit(AF_DEGRADED_MODE, &a->flags))
return FAILED;
if (host_reset)
esas2r_reset_adapter(a);
else
esas2r_reset_bus(a);
/* above call sets the AF_OS_RESET flag. wait for it to clear. */
while (test_bit(AF_OS_RESET, &a->flags)) {
msleep(10);
if (test_bit(AF_DEGRADED_MODE, &a->flags))
return FAILED;
}
if (test_bit(AF_DEGRADED_MODE, &a->flags))
return FAILED;
return SUCCESS;
}
int esas2r_host_reset(struct scsi_cmnd *cmd)
{
esas2r_log(ESAS2R_LOG_INFO, "host_reset (%p)", cmd);
return esas2r_host_bus_reset(cmd, true);
}
int esas2r_bus_reset(struct scsi_cmnd *cmd)
{
esas2r_log(ESAS2R_LOG_INFO, "bus_reset (%p)", cmd);
return esas2r_host_bus_reset(cmd, false);
}
static int esas2r_dev_targ_reset(struct scsi_cmnd *cmd, bool target_reset)
{
struct esas2r_adapter *a =
(struct esas2r_adapter *)cmd->device->host->hostdata;
struct esas2r_request *rq;
u8 task_management_status = RS_PENDING;
bool completed;
if (test_bit(AF_DEGRADED_MODE, &a->flags))
return FAILED;
retry:
rq = esas2r_alloc_request(a);
if (rq == NULL) {
if (target_reset) {
esas2r_log(ESAS2R_LOG_CRIT,
"unable to allocate a request for a "
"target reset (%d)!",
cmd->device->id);
} else {
esas2r_log(ESAS2R_LOG_CRIT,
"unable to allocate a request for a "
"device reset (%d:%d)!",
cmd->device->id,
cmd->device->lun);
}
return FAILED;
}
rq->target_id = cmd->device->id;
rq->vrq->scsi.flags |= cpu_to_le32(cmd->device->lun);
rq->req_stat = RS_PENDING;
rq->comp_cb = complete_task_management_request;
rq->task_management_status_ptr = &task_management_status;
if (target_reset) {
esas2r_debug("issuing target reset (%p) to id %d", rq,
cmd->device->id);
completed = esas2r_send_task_mgmt(a, rq, 0x20);
} else {
esas2r_debug("issuing device reset (%p) to id %d lun %d", rq,
cmd->device->id, cmd->device->lun);
completed = esas2r_send_task_mgmt(a, rq, 0x10);
}
if (completed) {
/* Task management cmd completed right away, need to free it. */
esas2r_free_request(a, rq);
} else {
/*
* Wait for firmware to complete the request. Completion
* callback will free it.
*/
while (task_management_status == RS_PENDING)
msleep(10);
}
if (test_bit(AF_DEGRADED_MODE, &a->flags))
return FAILED;
if (task_management_status == RS_BUSY) {
/*
* Busy, probably because we are flashing. Wait a bit and
* try again.
*/
msleep(100);
goto retry;
}
return SUCCESS;
}
int esas2r_device_reset(struct scsi_cmnd *cmd)
{
esas2r_log(ESAS2R_LOG_INFO, "device_reset (%p)", cmd);
return esas2r_dev_targ_reset(cmd, false);
}
int esas2r_target_reset(struct scsi_cmnd *cmd)
{
esas2r_log(ESAS2R_LOG_INFO, "target_reset (%p)", cmd);
return esas2r_dev_targ_reset(cmd, true);
}
void esas2r_log_request_failure(struct esas2r_adapter *a,
struct esas2r_request *rq)
{
u8 reqstatus = rq->req_stat;
if (reqstatus == RS_SUCCESS)
return;
if (rq->vrq->scsi.function == VDA_FUNC_SCSI) {
if (reqstatus == RS_SCSI_ERROR) {
if (rq->func_rsp.scsi_rsp.sense_len >= 13) {
esas2r_log(ESAS2R_LOG_WARN,
"request failure - SCSI error %x ASC:%x ASCQ:%x CDB:%x",
rq->sense_buf[2], rq->sense_buf[12],
rq->sense_buf[13],
rq->vrq->scsi.cdb[0]);
} else {
esas2r_log(ESAS2R_LOG_WARN,
"request failure - SCSI error CDB:%x\n",
rq->vrq->scsi.cdb[0]);
}
} else if ((rq->vrq->scsi.cdb[0] != INQUIRY
&& rq->vrq->scsi.cdb[0] != REPORT_LUNS)
|| (reqstatus != RS_SEL
&& reqstatus != RS_SEL2)) {
if ((reqstatus == RS_UNDERRUN) &&
(rq->vrq->scsi.cdb[0] == INQUIRY)) {
/* Don't log inquiry underruns */
} else {
esas2r_log(ESAS2R_LOG_WARN,
"request failure - cdb:%x reqstatus:%d target:%d",
rq->vrq->scsi.cdb[0], reqstatus,
rq->target_id);
}
}
}
}
void esas2r_wait_request(struct esas2r_adapter *a, struct esas2r_request *rq)
{
u32 starttime;
u32 timeout;
starttime = jiffies_to_msecs(jiffies);
timeout = rq->timeout ? rq->timeout : 5000;
while (true) {
esas2r_polled_interrupt(a);
if (rq->req_stat != RS_STARTED)
break;
schedule_timeout_interruptible(msecs_to_jiffies(100));
if ((jiffies_to_msecs(jiffies) - starttime) > timeout) {
esas2r_hdebug("request TMO");
esas2r_bugon();
rq->req_stat = RS_TIMEOUT;
esas2r_local_reset_adapter(a);
return;
}
}
}
u32 esas2r_map_data_window(struct esas2r_adapter *a, u32 addr_lo)
{
u32 offset = addr_lo & (MW_DATA_WINDOW_SIZE - 1);
u32 base = addr_lo & -(signed int)MW_DATA_WINDOW_SIZE;
if (a->window_base != base) {
esas2r_write_register_dword(a, MVR_PCI_WIN1_REMAP,
base | MVRPW1R_ENABLE);
esas2r_flush_register_dword(a, MVR_PCI_WIN1_REMAP);
a->window_base = base;
}
return offset;
}
/* Read a block of data from chip memory */
bool esas2r_read_mem_block(struct esas2r_adapter *a,
void *to,
u32 from,
u32 size)
{
u8 *end = (u8 *)to;
while (size) {
u32 len;
u32 offset;
u32 iatvr;
iatvr = (from & -(signed int)MW_DATA_WINDOW_SIZE);
esas2r_map_data_window(a, iatvr);
offset = from & (MW_DATA_WINDOW_SIZE - 1);
len = size;
if (len > MW_DATA_WINDOW_SIZE - offset)
len = MW_DATA_WINDOW_SIZE - offset;
from += len;
size -= len;
while (len--) {
*end++ = esas2r_read_data_byte(a, offset);
offset++;
}
}
return true;
}
void esas2r_nuxi_mgt_data(u8 function, void *data)
{
struct atto_vda_grp_info *g;
struct atto_vda_devinfo *d;
struct atto_vdapart_info *p;
struct atto_vda_dh_info *h;
struct atto_vda_metrics_info *m;
struct atto_vda_schedule_info *s;
struct atto_vda_buzzer_info *b;
u8 i;
switch (function) {
case VDAMGT_BUZZER_INFO:
case VDAMGT_BUZZER_SET:
b = (struct atto_vda_buzzer_info *)data;
b->duration = le32_to_cpu(b->duration);
break;
case VDAMGT_SCHEDULE_INFO:
case VDAMGT_SCHEDULE_EVENT:
s = (struct atto_vda_schedule_info *)data;
s->id = le32_to_cpu(s->id);
break;
case VDAMGT_DEV_INFO:
case VDAMGT_DEV_CLEAN:
case VDAMGT_DEV_PT_INFO:
case VDAMGT_DEV_FEATURES:
case VDAMGT_DEV_PT_FEATURES:
case VDAMGT_DEV_OPERATION:
d = (struct atto_vda_devinfo *)data;
d->capacity = le64_to_cpu(d->capacity);
d->block_size = le32_to_cpu(d->block_size);
d->ses_dev_index = le16_to_cpu(d->ses_dev_index);
d->target_id = le16_to_cpu(d->target_id);
d->lun = le16_to_cpu(d->lun);
d->features = le16_to_cpu(d->features);
break;
case VDAMGT_GRP_INFO:
case VDAMGT_GRP_CREATE:
case VDAMGT_GRP_DELETE:
case VDAMGT_ADD_STORAGE:
case VDAMGT_MEMBER_ADD:
case VDAMGT_GRP_COMMIT:
case VDAMGT_GRP_REBUILD:
case VDAMGT_GRP_COMMIT_INIT:
case VDAMGT_QUICK_RAID:
case VDAMGT_GRP_FEATURES:
case VDAMGT_GRP_COMMIT_INIT_AUTOMAP:
case VDAMGT_QUICK_RAID_INIT_AUTOMAP:
case VDAMGT_SPARE_LIST:
case VDAMGT_SPARE_ADD:
case VDAMGT_SPARE_REMOVE:
case VDAMGT_LOCAL_SPARE_ADD:
case VDAMGT_GRP_OPERATION:
g = (struct atto_vda_grp_info *)data;
g->capacity = le64_to_cpu(g->capacity);
g->block_size = le32_to_cpu(g->block_size);
g->interleave = le32_to_cpu(g->interleave);
g->features = le16_to_cpu(g->features);
for (i = 0; i < 32; i++)
g->members[i] = le16_to_cpu(g->members[i]);
break;
case VDAMGT_PART_INFO:
case VDAMGT_PART_MAP:
case VDAMGT_PART_UNMAP:
case VDAMGT_PART_AUTOMAP:
case VDAMGT_PART_SPLIT:
case VDAMGT_PART_MERGE:
p = (struct atto_vdapart_info *)data;
p->part_size = le64_to_cpu(p->part_size);
p->start_lba = le32_to_cpu(p->start_lba);
p->block_size = le32_to_cpu(p->block_size);
p->target_id = le16_to_cpu(p->target_id);
break;
case VDAMGT_DEV_HEALTH_REQ:
h = (struct atto_vda_dh_info *)data;
h->med_defect_cnt = le32_to_cpu(h->med_defect_cnt);
h->info_exc_cnt = le32_to_cpu(h->info_exc_cnt);
break;
case VDAMGT_DEV_METRICS:
m = (struct atto_vda_metrics_info *)data;
for (i = 0; i < 32; i++)
m->dev_indexes[i] = le16_to_cpu(m->dev_indexes[i]);
break;
default:
break;
}
}
void esas2r_nuxi_cfg_data(u8 function, void *data)
{
struct atto_vda_cfg_init *ci;
switch (function) {
case VDA_CFG_INIT:
case VDA_CFG_GET_INIT:
case VDA_CFG_GET_INIT2:
ci = (struct atto_vda_cfg_init *)data;
ci->date_time.year = le16_to_cpu(ci->date_time.year);
ci->sgl_page_size = le32_to_cpu(ci->sgl_page_size);
ci->vda_version = le32_to_cpu(ci->vda_version);
ci->epoch_time = le32_to_cpu(ci->epoch_time);
ci->ioctl_tunnel = le32_to_cpu(ci->ioctl_tunnel);
ci->num_targets_backend = le32_to_cpu(ci->num_targets_backend);
break;
default:
break;
}
}
void esas2r_nuxi_ae_data(union atto_vda_ae *ae)
{
struct atto_vda_ae_raid *r = &ae->raid;
struct atto_vda_ae_lu *l = &ae->lu;
switch (ae->hdr.bytype) {
case VDAAE_HDR_TYPE_RAID:
r->dwflags = le32_to_cpu(r->dwflags);
break;
case VDAAE_HDR_TYPE_LU:
l->dwevent = le32_to_cpu(l->dwevent);
l->wphys_target_id = le16_to_cpu(l->wphys_target_id);
l->id.tgtlun.wtarget_id = le16_to_cpu(l->id.tgtlun.wtarget_id);
if (l->hdr.bylength >= offsetof(struct atto_vda_ae_lu, id)
+ sizeof(struct atto_vda_ae_lu_tgt_lun_raid)) {
l->id.tgtlun_raid.dwinterleave
= le32_to_cpu(l->id.tgtlun_raid.dwinterleave);
l->id.tgtlun_raid.dwblock_size
= le32_to_cpu(l->id.tgtlun_raid.dwblock_size);
}
break;
case VDAAE_HDR_TYPE_DISK:
default:
break;
}
}
void esas2r_free_request(struct esas2r_adapter *a, struct esas2r_request *rq)
{
unsigned long flags;
esas2r_rq_destroy_request(rq, a);
spin_lock_irqsave(&a->request_lock, flags);
list_add(&rq->comp_list, &a->avail_request);
spin_unlock_irqrestore(&a->request_lock, flags);
}
struct esas2r_request *esas2r_alloc_request(struct esas2r_adapter *a)
{
struct esas2r_request *rq;
unsigned long flags;
spin_lock_irqsave(&a->request_lock, flags);
if (unlikely(list_empty(&a->avail_request))) {
spin_unlock_irqrestore(&a->request_lock, flags);
return NULL;
}
rq = list_first_entry(&a->avail_request, struct esas2r_request,
comp_list);
list_del(&rq->comp_list);
spin_unlock_irqrestore(&a->request_lock, flags);
esas2r_rq_init_request(rq, a);
return rq;
}
void esas2r_complete_request_cb(struct esas2r_adapter *a,
struct esas2r_request *rq)
{
esas2r_debug("completing request %p\n", rq);
scsi_dma_unmap(rq->cmd);
if (unlikely(rq->req_stat != RS_SUCCESS)) {
esas2r_debug("[%x STATUS %x:%x (%x)]", rq->target_id,
rq->req_stat,
rq->func_rsp.scsi_rsp.scsi_stat,
rq->cmd);
rq->cmd->result =
((esas2r_req_status_to_error(rq->req_stat) << 16)
| (rq->func_rsp.scsi_rsp.scsi_stat & STATUS_MASK));
if (rq->req_stat == RS_UNDERRUN)
scsi_set_resid(rq->cmd,
le32_to_cpu(rq->func_rsp.scsi_rsp.
residual_length));
else
scsi_set_resid(rq->cmd, 0);
}
rq->cmd->scsi_done(rq->cmd);
esas2r_free_request(a, rq);
}
/* Run tasklet to handle stuff outside of interrupt context. */
void esas2r_adapter_tasklet(unsigned long context)
{
struct esas2r_adapter *a = (struct esas2r_adapter *)context;
if (unlikely(test_bit(AF2_TIMER_TICK, &a->flags2))) {
clear_bit(AF2_TIMER_TICK, &a->flags2);
esas2r_timer_tick(a);
}
if (likely(test_bit(AF2_INT_PENDING, &a->flags2))) {
clear_bit(AF2_INT_PENDING, &a->flags2);
esas2r_adapter_interrupt(a);
}
if (esas2r_is_tasklet_pending(a))
esas2r_do_tasklet_tasks(a);
if (esas2r_is_tasklet_pending(a)
|| (test_bit(AF2_INT_PENDING, &a->flags2))
|| (test_bit(AF2_TIMER_TICK, &a->flags2))) {
clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
esas2r_schedule_tasklet(a);
} else {
clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
}
}
static void esas2r_timer_callback(unsigned long context);
void esas2r_kickoff_timer(struct esas2r_adapter *a)
{
init_timer(&a->timer);
a->timer.function = esas2r_timer_callback;
a->timer.data = (unsigned long)a;
a->timer.expires = jiffies +
msecs_to_jiffies(100);
add_timer(&a->timer);
}
static void esas2r_timer_callback(unsigned long context)
{
struct esas2r_adapter *a = (struct esas2r_adapter *)context;
set_bit(AF2_TIMER_TICK, &a->flags2);
esas2r_schedule_tasklet(a);
esas2r_kickoff_timer(a);
}
/*
* Firmware events need to be handled outside of interrupt context
* so we schedule a delayed_work to handle them.
*/
static void
esas2r_free_fw_event(struct esas2r_fw_event_work *fw_event)
{
unsigned long flags;
struct esas2r_adapter *a = fw_event->a;
spin_lock_irqsave(&a->fw_event_lock, flags);
list_del(&fw_event->list);
kfree(fw_event);
spin_unlock_irqrestore(&a->fw_event_lock, flags);
}
void
esas2r_fw_event_off(struct esas2r_adapter *a)
{
unsigned long flags;
spin_lock_irqsave(&a->fw_event_lock, flags);
a->fw_events_off = 1;
spin_unlock_irqrestore(&a->fw_event_lock, flags);
}
void
esas2r_fw_event_on(struct esas2r_adapter *a)
{
unsigned long flags;
spin_lock_irqsave(&a->fw_event_lock, flags);
a->fw_events_off = 0;
spin_unlock_irqrestore(&a->fw_event_lock, flags);
}
static void esas2r_add_device(struct esas2r_adapter *a, u16 target_id)
{
int ret;
struct scsi_device *scsi_dev;
scsi_dev = scsi_device_lookup(a->host, 0, target_id, 0);
if (scsi_dev) {
esas2r_log_dev(
ESAS2R_LOG_WARN,
&(scsi_dev->
sdev_gendev),
"scsi device already exists at id %d", target_id);
scsi_device_put(scsi_dev);
} else {
esas2r_log_dev(
ESAS2R_LOG_INFO,
&(a->host->
shost_gendev),
"scsi_add_device() called for 0:%d:0",
target_id);
ret = scsi_add_device(a->host, 0, target_id, 0);
if (ret) {
esas2r_log_dev(
ESAS2R_LOG_CRIT,
&(a->host->
shost_gendev),
"scsi_add_device failed with %d for id %d",
ret, target_id);
}
}
}
static void esas2r_remove_device(struct esas2r_adapter *a, u16 target_id)
{
struct scsi_device *scsi_dev;
scsi_dev = scsi_device_lookup(a->host, 0, target_id, 0);
if (scsi_dev) {
scsi_device_set_state(scsi_dev, SDEV_OFFLINE);
esas2r_log_dev(
ESAS2R_LOG_INFO,
&(scsi_dev->
sdev_gendev),
"scsi_remove_device() called for 0:%d:0",
target_id);
scsi_remove_device(scsi_dev);
esas2r_log_dev(
ESAS2R_LOG_INFO,
&(scsi_dev->
sdev_gendev),
"scsi_device_put() called");
scsi_device_put(scsi_dev);
} else {
esas2r_log_dev(
ESAS2R_LOG_WARN,
&(a->host->shost_gendev),
"no target found at id %d",
target_id);
}
}
/*
* Sends a firmware asynchronous event to anyone who happens to be
* listening on the defined ATTO VDA event ports.
*/
static void esas2r_send_ae_event(struct esas2r_fw_event_work *fw_event)
{
struct esas2r_vda_ae *ae = (struct esas2r_vda_ae *)fw_event->data;
char *type;
switch (ae->vda_ae.hdr.bytype) {
case VDAAE_HDR_TYPE_RAID:
type = "RAID group state change";
break;
case VDAAE_HDR_TYPE_LU:
type = "Mapped destination LU change";
break;
case VDAAE_HDR_TYPE_DISK:
type = "Physical disk inventory change";
break;
case VDAAE_HDR_TYPE_RESET:
type = "Firmware reset";
break;
case VDAAE_HDR_TYPE_LOG_INFO:
type = "Event Log message (INFO level)";
break;
case VDAAE_HDR_TYPE_LOG_WARN:
type = "Event Log message (WARN level)";
break;
case VDAAE_HDR_TYPE_LOG_CRIT:
type = "Event Log message (CRIT level)";
break;
case VDAAE_HDR_TYPE_LOG_FAIL:
type = "Event Log message (FAIL level)";
break;
case VDAAE_HDR_TYPE_NVC:
type = "NVCache change";
break;
case VDAAE_HDR_TYPE_TLG_INFO:
type = "Time stamped log message (INFO level)";
break;
case VDAAE_HDR_TYPE_TLG_WARN:
type = "Time stamped log message (WARN level)";
break;
case VDAAE_HDR_TYPE_TLG_CRIT:
type = "Time stamped log message (CRIT level)";
break;
case VDAAE_HDR_TYPE_PWRMGT:
type = "Power management";
break;
case VDAAE_HDR_TYPE_MUTE:
type = "Mute button pressed";
break;
case VDAAE_HDR_TYPE_DEV:
type = "Device attribute change";
break;
default:
type = "Unknown";
break;
}
esas2r_log(ESAS2R_LOG_WARN,
"An async event of type \"%s\" was received from the firmware. The event contents are:",
type);
esas2r_log_hexdump(ESAS2R_LOG_WARN, &ae->vda_ae,
ae->vda_ae.hdr.bylength);
}
static void
esas2r_firmware_event_work(struct work_struct *work)
{
struct esas2r_fw_event_work *fw_event =
container_of(work, struct esas2r_fw_event_work, work.work);
struct esas2r_adapter *a = fw_event->a;
u16 target_id = *(u16 *)&fw_event->data[0];
if (a->fw_events_off)
goto done;
switch (fw_event->type) {
case fw_event_null:
break; /* do nothing */
case fw_event_lun_change:
esas2r_remove_device(a, target_id);
esas2r_add_device(a, target_id);
break;
case fw_event_present:
esas2r_add_device(a, target_id);
break;
case fw_event_not_present:
esas2r_remove_device(a, target_id);
break;
case fw_event_vda_ae:
esas2r_send_ae_event(fw_event);
break;
}
done:
esas2r_free_fw_event(fw_event);
}
void esas2r_queue_fw_event(struct esas2r_adapter *a,
enum fw_event_type type,
void *data,
int data_sz)
{
struct esas2r_fw_event_work *fw_event;
unsigned long flags;
fw_event = kzalloc(sizeof(struct esas2r_fw_event_work), GFP_ATOMIC);
if (!fw_event) {
esas2r_log(ESAS2R_LOG_WARN,
"esas2r_queue_fw_event failed to alloc");
return;
}
if (type == fw_event_vda_ae) {
struct esas2r_vda_ae *ae =
(struct esas2r_vda_ae *)fw_event->data;
ae->signature = ESAS2R_VDA_EVENT_SIG;
ae->bus_number = a->pcid->bus->number;
ae->devfn = a->pcid->devfn;
memcpy(&ae->vda_ae, data, sizeof(ae->vda_ae));
} else {
memcpy(fw_event->data, data, data_sz);
}
fw_event->type = type;
fw_event->a = a;
spin_lock_irqsave(&a->fw_event_lock, flags);
list_add_tail(&fw_event->list, &a->fw_event_list);
INIT_DELAYED_WORK(&fw_event->work, esas2r_firmware_event_work);
queue_delayed_work_on(
smp_processor_id(), a->fw_event_q, &fw_event->work,
msecs_to_jiffies(1));
spin_unlock_irqrestore(&a->fw_event_lock, flags);
}
void esas2r_target_state_changed(struct esas2r_adapter *a, u16 targ_id,
u8 state)
{
if (state == TS_LUN_CHANGE)
esas2r_queue_fw_event(a, fw_event_lun_change, &targ_id,
sizeof(targ_id));
else if (state == TS_PRESENT)
esas2r_queue_fw_event(a, fw_event_present, &targ_id,
sizeof(targ_id));
else if (state == TS_NOT_PRESENT)
esas2r_queue_fw_event(a, fw_event_not_present, &targ_id,
sizeof(targ_id));
}
/* Translate status to a Linux SCSI mid-layer error code */
int esas2r_req_status_to_error(u8 req_stat)
{
switch (req_stat) {
case RS_OVERRUN:
case RS_UNDERRUN:
case RS_SUCCESS:
/*
* NOTE: SCSI mid-layer wants a good status for a SCSI error, because
* it will check the scsi_stat value in the completion anyway.
*/
case RS_SCSI_ERROR:
return DID_OK;
case RS_SEL:
case RS_SEL2:
return DID_NO_CONNECT;
case RS_RESET:
return DID_RESET;
case RS_ABORTED:
return DID_ABORT;
case RS_BUSY:
return DID_BUS_BUSY;
}
/* everything else is just an error. */
return DID_ERROR;
}
module_init(esas2r_init);
module_exit(esas2r_exit);
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