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ubuntu-linux-kernel/drivers/scsi/esas2r/esas2r_main.c

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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 = kmalloc(sizeof(struct atto_ioctl),
GFP_KERNEL);
if (a->local_atto_ioctl == NULL) {
esas2r_log(ESAS2R_LOG_WARN,
"write_hw kzalloc failed for %zu 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 = SG_CHUNK_SIZE,
.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,
};
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 = SG_CHUNK_SIZE;
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 const 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_putc(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:%llu)!",
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(struct timer_list *t);
void esas2r_kickoff_timer(struct esas2r_adapter *a)
{
timer_setup(&a->timer, esas2r_timer_callback, 0);
a->timer.expires = jiffies +
msecs_to_jiffies(100);
add_timer(&a->timer);
}
static void esas2r_timer_callback(struct timer_list *t)
{
struct esas2r_adapter *a = from_timer(a, t, timer);
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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