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3w-xxxx.c
2459 lines (2094 loc) · 83.8 KB
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3w-xxxx.c
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/*
3w-xxxx.c -- 3ware Storage Controller device driver for Linux.
Written By: Adam Radford <linuxraid@lsi.com>
Modifications By: Joel Jacobson <linux@3ware.com>
Arnaldo Carvalho de Melo <acme@conectiva.com.br>
Brad Strand <linux@3ware.com>
Copyright (C) 1999-2010 3ware Inc.
Kernel compatibility By: Andre Hedrick <andre@suse.com>
Non-Copyright (C) 2000 Andre Hedrick <andre@suse.com>
Further tiny build fixes and trivial hoovering Alan Cox
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; version 2 of the License.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Bugs/Comments/Suggestions should be mailed to:
linuxraid@lsi.com
For more information, goto:
http://www.lsi.com
History
-------
0.1.000 - Initial release.
0.4.000 - Added support for Asynchronous Event Notification through
ioctls for 3DM.
1.0.000 - Added DPO & FUA bit support for WRITE_10 & WRITE_6 cdb
to disable drive write-cache before writes.
1.1.000 - Fixed performance bug with DPO & FUA not existing for WRITE_6.
1.2.000 - Added support for clean shutdown notification/feature table.
1.02.00.001 - Added support for full command packet posts through ioctls
for 3DM.
Bug fix so hot spare drives don't show up.
1.02.00.002 - Fix bug with tw_setfeature() call that caused oops on some
systems.
08/21/00 - release previously allocated resources on failure at
tw_allocate_memory (acme)
1.02.00.003 - Fix tw_interrupt() to report error to scsi layer when
controller status is non-zero.
Added handling of request_sense opcode.
Fix possible null pointer dereference in
tw_reset_device_extension()
1.02.00.004 - Add support for device id of 3ware 7000 series controllers.
Make tw_setfeature() call with interrupts disabled.
Register interrupt handler before enabling interrupts.
Clear attention interrupt before draining aen queue.
1.02.00.005 - Allocate bounce buffers and custom queue depth for raid5 for
6000 and 5000 series controllers.
Reduce polling mdelays causing problems on some systems.
Fix use_sg = 1 calculation bug.
Check for scsi_register returning NULL.
Add aen count to /proc/scsi/3w-xxxx.
Remove aen code unit masking in tw_aen_complete().
1.02.00.006 - Remove unit from printk in tw_scsi_eh_abort(), causing
possible oops.
Fix possible null pointer dereference in tw_scsi_queue()
if done function pointer was invalid.
1.02.00.007 - Fix possible null pointer dereferences in tw_ioctl().
Remove check for invalid done function pointer from
tw_scsi_queue().
1.02.00.008 - Set max sectors per io to TW_MAX_SECTORS in tw_findcards().
Add tw_decode_error() for printing readable error messages.
Print some useful information on certain aen codes.
Add tw_decode_bits() for interpreting status register output.
Make scsi_set_pci_device() for kernels >= 2.4.4
Fix bug where aen's could be lost before a reset.
Re-add spinlocks in tw_scsi_detect().
Fix possible null pointer dereference in tw_aen_drain_queue()
during initialization.
Clear pci parity errors during initialization and during io.
1.02.00.009 - Remove redundant increment in tw_state_request_start().
Add ioctl support for direct ATA command passthru.
Add entire aen code string list.
1.02.00.010 - Cleanup queueing code, fix jbod thoughput.
Fix get_param for specific units.
1.02.00.011 - Fix bug in tw_aen_complete() where aen's could be lost.
Fix tw_aen_drain_queue() to display useful info at init.
Set tw_host->max_id for 12 port cards.
Add ioctl support for raw command packet post from userspace
with sglist fragments (parameter and io).
1.02.00.012 - Fix read capacity to under report by 1 sector to fix get
last sector ioctl.
1.02.00.013 - Fix bug where more AEN codes weren't coming out during
driver initialization.
Improved handling of PCI aborts.
1.02.00.014 - Fix bug in tw_findcards() where AEN code could be lost.
Increase timeout in tw_aen_drain_queue() to 30 seconds.
1.02.00.015 - Re-write raw command post with data ioctl method.
Remove raid5 bounce buffers for raid5 for 6XXX for kernel 2.5
Add tw_map/unmap_scsi_sg/single_data() for kernel 2.5
Replace io_request_lock with host_lock for kernel 2.5
Set max_cmd_len to 16 for 3dm for kernel 2.5
1.02.00.016 - Set host->max_sectors back up to 256.
1.02.00.017 - Modified pci parity error handling/clearing from config space
during initialization.
1.02.00.018 - Better handling of request sense opcode and sense information
for failed commands. Add tw_decode_sense().
Replace all mdelay()'s with scsi_sleep().
1.02.00.019 - Revert mdelay's and scsi_sleep's, this caused problems on
some SMP systems.
1.02.00.020 - Add pci_set_dma_mask(), rewrite kmalloc()/virt_to_bus() to
pci_alloc/free_consistent().
Better alignment checking in tw_allocate_memory().
Cleanup tw_initialize_device_extension().
1.02.00.021 - Bump cmd_per_lun in SHT to 255 for better jbod performance.
Improve handling of errors in tw_interrupt().
Add handling/clearing of controller queue error.
Empty stale responses before draining aen queue.
Fix tw_scsi_eh_abort() to not reset on every io abort.
Set can_queue in SHT to 255 to prevent hang from AEN.
1.02.00.022 - Fix possible null pointer dereference in tw_scsi_release().
1.02.00.023 - Fix bug in tw_aen_drain_queue() where unit # was always zero.
1.02.00.024 - Add severity levels to AEN strings.
1.02.00.025 - Fix command interrupt spurious error messages.
Fix bug in raw command post with data ioctl method.
Fix bug where rollcall sometimes failed with cable errors.
Print unit # on all command timeouts.
1.02.00.026 - Fix possible infinite retry bug with power glitch induced
drive timeouts.
Cleanup some AEN severity levels.
1.02.00.027 - Add drive not supported AEN code for SATA controllers.
Remove spurious unknown ioctl error message.
1.02.00.028 - Fix bug where multiple controllers with no units were the
same card number.
Fix bug where cards were being shut down more than once.
1.02.00.029 - Add missing pci_free_consistent() in tw_allocate_memory().
Replace pci_map_single() with pci_map_page() for highmem.
Check for tw_setfeature() failure.
1.02.00.030 - Make driver 64-bit clean.
1.02.00.031 - Cleanup polling timeouts/routines in several places.
Add support for mode sense opcode.
Add support for cache mode page.
Add support for synchronize cache opcode.
1.02.00.032 - Fix small multicard rollcall bug.
Make driver stay loaded with no units for hot add/swap.
Add support for "twe" character device for ioctls.
Clean up request_id queueing code.
Fix tw_scsi_queue() spinlocks.
1.02.00.033 - Fix tw_aen_complete() to not queue 'queue empty' AEN's.
Initialize queues correctly when loading with no valid units.
1.02.00.034 - Fix tw_decode_bits() to handle multiple errors.
Add support for user configurable cmd_per_lun.
Add support for sht->slave_configure().
1.02.00.035 - Improve tw_allocate_memory() memory allocation.
Fix tw_chrdev_ioctl() to sleep correctly.
1.02.00.036 - Increase character ioctl timeout to 60 seconds.
1.02.00.037 - Fix tw_ioctl() to handle all non-data ATA passthru cmds
for 'smartmontools' support.
1.26.00.038 - Roll driver minor version to 26 to denote kernel 2.6.
Add support for cmds_per_lun module parameter.
1.26.00.039 - Fix bug in tw_chrdev_ioctl() polling code.
Fix data_buffer_length usage in tw_chrdev_ioctl().
Update contact information.
1.26.02.000 - Convert driver to pci_driver format.
1.26.02.001 - Increase max ioctl buffer size to 512 sectors.
Make tw_scsi_queue() return 0 for 'Unknown scsi opcode'.
Fix tw_remove() to free irq handler/unregister_chrdev()
before shutting down card.
Change to new 'change_queue_depth' api.
Fix 'handled=1' ISR usage, remove bogus IRQ check.
1.26.02.002 - Free irq handler in __tw_shutdown().
Turn on RCD bit for caching mode page.
Serialize reset code.
1.26.02.003 - Force 60 second timeout default.
*/
#include <linux/module.h>
#include <linux/reboot.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/gfp.h>
#include <linux/pci.h>
#include <linux/time.h>
#include <linux/mutex.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_cmnd.h>
#include "3w-xxxx.h"
/* Globals */
#define TW_DRIVER_VERSION "1.26.02.003"
static DEFINE_MUTEX(tw_mutex);
static TW_Device_Extension *tw_device_extension_list[TW_MAX_SLOT];
static int tw_device_extension_count = 0;
static int twe_major = -1;
/* Module parameters */
MODULE_AUTHOR("LSI");
MODULE_DESCRIPTION("3ware Storage Controller Linux Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(TW_DRIVER_VERSION);
/* Function prototypes */
static int tw_reset_device_extension(TW_Device_Extension *tw_dev);
/* Functions */
/* This function will check the status register for unexpected bits */
static int tw_check_bits(u32 status_reg_value)
{
if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS) {
dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): No expected bits (0x%x).\n", status_reg_value);
return 1;
}
if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0) {
dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): Found unexpected bits (0x%x).\n", status_reg_value);
return 1;
}
return 0;
} /* End tw_check_bits() */
/* This function will print readable messages from status register errors */
static int tw_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value, int print_host)
{
char host[16];
dprintk(KERN_WARNING "3w-xxxx: tw_decode_bits()\n");
if (print_host)
sprintf(host, " scsi%d:", tw_dev->host->host_no);
else
host[0] = '\0';
if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) {
printk(KERN_WARNING "3w-xxxx:%s PCI Parity Error: clearing.\n", host);
outl(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
}
if (status_reg_value & TW_STATUS_PCI_ABORT) {
printk(KERN_WARNING "3w-xxxx:%s PCI Abort: clearing.\n", host);
outl(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev));
pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT);
}
if (status_reg_value & TW_STATUS_QUEUE_ERROR) {
printk(KERN_WARNING "3w-xxxx:%s Controller Queue Error: clearing.\n", host);
outl(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
}
if (status_reg_value & TW_STATUS_SBUF_WRITE_ERROR) {
printk(KERN_WARNING "3w-xxxx:%s SBUF Write Error: clearing.\n", host);
outl(TW_CONTROL_CLEAR_SBUF_WRITE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
}
if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) {
if (tw_dev->reset_print == 0) {
printk(KERN_WARNING "3w-xxxx:%s Microcontroller Error: clearing.\n", host);
tw_dev->reset_print = 1;
}
return 1;
}
return 0;
} /* End tw_decode_bits() */
/* This function will poll the status register for a flag */
static int tw_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds)
{
u32 status_reg_value;
unsigned long before;
int retval = 1;
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
before = jiffies;
if (tw_check_bits(status_reg_value))
tw_decode_bits(tw_dev, status_reg_value, 0);
while ((status_reg_value & flag) != flag) {
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
if (tw_check_bits(status_reg_value))
tw_decode_bits(tw_dev, status_reg_value, 0);
if (time_after(jiffies, before + HZ * seconds))
goto out;
msleep(50);
}
retval = 0;
out:
return retval;
} /* End tw_poll_status() */
/* This function will poll the status register for disappearance of a flag */
static int tw_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds)
{
u32 status_reg_value;
unsigned long before;
int retval = 1;
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
before = jiffies;
if (tw_check_bits(status_reg_value))
tw_decode_bits(tw_dev, status_reg_value, 0);
while ((status_reg_value & flag) != 0) {
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
if (tw_check_bits(status_reg_value))
tw_decode_bits(tw_dev, status_reg_value, 0);
if (time_after(jiffies, before + HZ * seconds))
goto out;
msleep(50);
}
retval = 0;
out:
return retval;
} /* End tw_poll_status_gone() */
/* This function will attempt to post a command packet to the board */
static int tw_post_command_packet(TW_Device_Extension *tw_dev, int request_id)
{
u32 status_reg_value;
unsigned long command_que_value;
dprintk(KERN_NOTICE "3w-xxxx: tw_post_command_packet()\n");
command_que_value = tw_dev->command_packet_physical_address[request_id];
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
if (tw_check_bits(status_reg_value)) {
dprintk(KERN_WARNING "3w-xxxx: tw_post_command_packet(): Unexpected bits.\n");
tw_decode_bits(tw_dev, status_reg_value, 1);
}
if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
/* We successfully posted the command packet */
outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
tw_dev->state[request_id] = TW_S_POSTED;
tw_dev->posted_request_count++;
if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) {
tw_dev->max_posted_request_count = tw_dev->posted_request_count;
}
} else {
/* Couldn't post the command packet, so we do it in the isr */
if (tw_dev->state[request_id] != TW_S_PENDING) {
tw_dev->state[request_id] = TW_S_PENDING;
tw_dev->pending_request_count++;
if (tw_dev->pending_request_count > tw_dev->max_pending_request_count) {
tw_dev->max_pending_request_count = tw_dev->pending_request_count;
}
tw_dev->pending_queue[tw_dev->pending_tail] = request_id;
if (tw_dev->pending_tail == TW_Q_LENGTH-1) {
tw_dev->pending_tail = TW_Q_START;
} else {
tw_dev->pending_tail = tw_dev->pending_tail + 1;
}
}
TW_UNMASK_COMMAND_INTERRUPT(tw_dev);
return 1;
}
return 0;
} /* End tw_post_command_packet() */
/* This function will return valid sense buffer information for failed cmds */
static int tw_decode_sense(TW_Device_Extension *tw_dev, int request_id, int fill_sense)
{
int i;
TW_Command *command;
dprintk(KERN_WARNING "3w-xxxx: tw_decode_sense()\n");
command = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
printk(KERN_WARNING "3w-xxxx: scsi%d: Command failed: status = 0x%x, flags = 0x%x, unit #%d.\n", tw_dev->host->host_no, command->status, command->flags, TW_UNIT_OUT(command->unit__hostid));
/* Attempt to return intelligent sense information */
if (fill_sense) {
if ((command->status == 0xc7) || (command->status == 0xcb)) {
for (i = 0; i < ARRAY_SIZE(tw_sense_table); i++) {
if (command->flags == tw_sense_table[i][0]) {
/* Valid bit and 'current errors' */
tw_dev->srb[request_id]->sense_buffer[0] = (0x1 << 7 | 0x70);
/* Sense key */
tw_dev->srb[request_id]->sense_buffer[2] = tw_sense_table[i][1];
/* Additional sense length */
tw_dev->srb[request_id]->sense_buffer[7] = 0xa; /* 10 bytes */
/* Additional sense code */
tw_dev->srb[request_id]->sense_buffer[12] = tw_sense_table[i][2];
/* Additional sense code qualifier */
tw_dev->srb[request_id]->sense_buffer[13] = tw_sense_table[i][3];
tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
return TW_ISR_DONT_RESULT; /* Special case for isr to not over-write result */
}
}
}
/* If no table match, error so we get a reset */
return 1;
}
return 0;
} /* End tw_decode_sense() */
/* This function will report controller error status */
static int tw_check_errors(TW_Device_Extension *tw_dev)
{
u32 status_reg_value;
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
if (TW_STATUS_ERRORS(status_reg_value) || tw_check_bits(status_reg_value)) {
tw_decode_bits(tw_dev, status_reg_value, 0);
return 1;
}
return 0;
} /* End tw_check_errors() */
/* This function will empty the response que */
static void tw_empty_response_que(TW_Device_Extension *tw_dev)
{
u32 status_reg_value, response_que_value;
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
response_que_value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
}
} /* End tw_empty_response_que() */
/* This function will free a request_id */
static void tw_state_request_finish(TW_Device_Extension *tw_dev, int request_id)
{
tw_dev->free_queue[tw_dev->free_tail] = request_id;
tw_dev->state[request_id] = TW_S_FINISHED;
tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
} /* End tw_state_request_finish() */
/* This function will assign an available request_id */
static void tw_state_request_start(TW_Device_Extension *tw_dev, int *request_id)
{
*request_id = tw_dev->free_queue[tw_dev->free_head];
tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
tw_dev->state[*request_id] = TW_S_STARTED;
} /* End tw_state_request_start() */
/* Show some statistics about the card */
static ssize_t tw_show_stats(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct Scsi_Host *host = class_to_shost(dev);
TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
unsigned long flags = 0;
ssize_t len;
spin_lock_irqsave(tw_dev->host->host_lock, flags);
len = snprintf(buf, PAGE_SIZE, "3w-xxxx Driver version: %s\n"
"Current commands posted: %4d\n"
"Max commands posted: %4d\n"
"Current pending commands: %4d\n"
"Max pending commands: %4d\n"
"Last sgl length: %4d\n"
"Max sgl length: %4d\n"
"Last sector count: %4d\n"
"Max sector count: %4d\n"
"SCSI Host Resets: %4d\n"
"AEN's: %4d\n",
TW_DRIVER_VERSION,
tw_dev->posted_request_count,
tw_dev->max_posted_request_count,
tw_dev->pending_request_count,
tw_dev->max_pending_request_count,
tw_dev->sgl_entries,
tw_dev->max_sgl_entries,
tw_dev->sector_count,
tw_dev->max_sector_count,
tw_dev->num_resets,
tw_dev->aen_count);
spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
return len;
} /* End tw_show_stats() */
/* This function will set a devices queue depth */
static int tw_change_queue_depth(struct scsi_device *sdev, int queue_depth,
int reason)
{
if (reason != SCSI_QDEPTH_DEFAULT)
return -EOPNOTSUPP;
if (queue_depth > TW_Q_LENGTH-2)
queue_depth = TW_Q_LENGTH-2;
scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
return queue_depth;
} /* End tw_change_queue_depth() */
/* Create sysfs 'stats' entry */
static struct device_attribute tw_host_stats_attr = {
.attr = {
.name = "stats",
.mode = S_IRUGO,
},
.show = tw_show_stats
};
/* Host attributes initializer */
static struct device_attribute *tw_host_attrs[] = {
&tw_host_stats_attr,
NULL,
};
/* This function will read the aen queue from the isr */
static int tw_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
{
TW_Command *command_packet;
TW_Param *param;
unsigned long command_que_value;
u32 status_reg_value;
unsigned long param_value = 0;
dprintk(KERN_NOTICE "3w-xxxx: tw_aen_read_queue()\n");
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
if (tw_check_bits(status_reg_value)) {
dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Unexpected bits.\n");
tw_decode_bits(tw_dev, status_reg_value, 1);
return 1;
}
if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet virtual address.\n");
return 1;
}
command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
memset(command_packet, 0, sizeof(TW_Sector));
command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
command_packet->size = 4;
command_packet->request_id = request_id;
command_packet->status = 0;
command_packet->flags = 0;
command_packet->byte6.parameter_count = 1;
command_que_value = tw_dev->command_packet_physical_address[request_id];
if (command_que_value == 0) {
printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet physical address.\n");
return 1;
}
/* Now setup the param */
if (tw_dev->alignment_virtual_address[request_id] == NULL) {
printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment virtual address.\n");
return 1;
}
param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
memset(param, 0, sizeof(TW_Sector));
param->table_id = 0x401; /* AEN table */
param->parameter_id = 2; /* Unit code */
param->parameter_size_bytes = 2;
param_value = tw_dev->alignment_physical_address[request_id];
if (param_value == 0) {
printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment physical address.\n");
return 1;
}
command_packet->byte8.param.sgl[0].address = param_value;
command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
/* Now post the command packet */
if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post succeeded.\n");
tw_dev->srb[request_id] = NULL; /* Flag internal command */
tw_dev->state[request_id] = TW_S_POSTED;
outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
} else {
printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post failed, will retry.\n");
return 1;
}
return 0;
} /* End tw_aen_read_queue() */
/* This function will complete an aen request from the isr */
static int tw_aen_complete(TW_Device_Extension *tw_dev, int request_id)
{
TW_Param *param;
unsigned short aen;
int error = 0, table_max = 0;
dprintk(KERN_WARNING "3w-xxxx: tw_aen_complete()\n");
if (tw_dev->alignment_virtual_address[request_id] == NULL) {
printk(KERN_WARNING "3w-xxxx: tw_aen_complete(): Bad alignment virtual address.\n");
return 1;
}
param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
aen = *(unsigned short *)(param->data);
dprintk(KERN_NOTICE "3w-xxxx: tw_aen_complete(): Queue'd code 0x%x\n", aen);
/* Print some useful info when certain aen codes come out */
if (aen == 0x0ff) {
printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: INFO: AEN queue overflow.\n", tw_dev->host->host_no);
} else {
table_max = ARRAY_SIZE(tw_aen_string);
if ((aen & 0x0ff) < table_max) {
if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s%d.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff], aen >> 8);
} else {
if (aen != 0x0)
printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff]);
}
} else {
printk(KERN_WARNING "3w-xxxx: scsi%d: Received AEN %d.\n", tw_dev->host->host_no, aen);
}
}
if (aen != TW_AEN_QUEUE_EMPTY) {
tw_dev->aen_count++;
/* Now queue the code */
tw_dev->aen_queue[tw_dev->aen_tail] = aen;
if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
tw_dev->aen_tail = TW_Q_START;
} else {
tw_dev->aen_tail = tw_dev->aen_tail + 1;
}
if (tw_dev->aen_head == tw_dev->aen_tail) {
if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
tw_dev->aen_head = TW_Q_START;
} else {
tw_dev->aen_head = tw_dev->aen_head + 1;
}
}
error = tw_aen_read_queue(tw_dev, request_id);
if (error) {
printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing AEN.\n", tw_dev->host->host_no);
tw_dev->state[request_id] = TW_S_COMPLETED;
tw_state_request_finish(tw_dev, request_id);
}
} else {
tw_dev->state[request_id] = TW_S_COMPLETED;
tw_state_request_finish(tw_dev, request_id);
}
return 0;
} /* End tw_aen_complete() */
/* This function will drain the aen queue after a soft reset */
static int tw_aen_drain_queue(TW_Device_Extension *tw_dev)
{
TW_Command *command_packet;
TW_Param *param;
int request_id = 0;
unsigned long command_que_value;
unsigned long param_value;
TW_Response_Queue response_queue;
unsigned short aen;
unsigned short aen_code;
int finished = 0;
int first_reset = 0;
int queue = 0;
int found = 0, table_max = 0;
dprintk(KERN_NOTICE "3w-xxxx: tw_aen_drain_queue()\n");
if (tw_poll_status(tw_dev, TW_STATUS_ATTENTION_INTERRUPT | TW_STATUS_MICROCONTROLLER_READY, 30)) {
dprintk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): No attention interrupt for card %d.\n", tw_device_extension_count);
return 1;
}
TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
/* Empty response queue */
tw_empty_response_que(tw_dev);
/* Initialize command packet */
if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet virtual address.\n");
return 1;
}
command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
memset(command_packet, 0, sizeof(TW_Sector));
command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
command_packet->size = 4;
command_packet->request_id = request_id;
command_packet->status = 0;
command_packet->flags = 0;
command_packet->byte6.parameter_count = 1;
command_que_value = tw_dev->command_packet_physical_address[request_id];
if (command_que_value == 0) {
printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet physical address.\n");
return 1;
}
/* Now setup the param */
if (tw_dev->alignment_virtual_address[request_id] == NULL) {
printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment virtual address.\n");
return 1;
}
param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
memset(param, 0, sizeof(TW_Sector));
param->table_id = 0x401; /* AEN table */
param->parameter_id = 2; /* Unit code */
param->parameter_size_bytes = 2;
param_value = tw_dev->alignment_physical_address[request_id];
if (param_value == 0) {
printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment physical address.\n");
return 1;
}
command_packet->byte8.param.sgl[0].address = param_value;
command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
/* Now drain the controller's aen queue */
do {
/* Post command packet */
outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
/* Now poll for completion */
if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
request_id = TW_RESID_OUT(response_queue.response_id);
if (request_id != 0) {
/* Unexpected request id */
printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Unexpected request id.\n");
return 1;
}
if (command_packet->status != 0) {
if (command_packet->flags != TW_AEN_TABLE_UNDEFINED) {
/* Bad response */
tw_decode_sense(tw_dev, request_id, 0);
return 1;
} else {
/* We know this is a 3w-1x00, and doesn't support aen's */
return 0;
}
}
/* Now check the aen */
aen = *(unsigned short *)(param->data);
aen_code = (aen & 0x0ff);
queue = 0;
switch (aen_code) {
case TW_AEN_QUEUE_EMPTY:
dprintk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
if (first_reset != 1) {
return 1;
} else {
finished = 1;
}
break;
case TW_AEN_SOFT_RESET:
if (first_reset == 0) {
first_reset = 1;
} else {
printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
tw_dev->aen_count++;
queue = 1;
}
break;
default:
if (aen == 0x0ff) {
printk(KERN_WARNING "3w-xxxx: AEN: INFO: AEN queue overflow.\n");
} else {
table_max = ARRAY_SIZE(tw_aen_string);
if ((aen & 0x0ff) < table_max) {
if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
printk(KERN_WARNING "3w-xxxx: AEN: %s%d.\n", tw_aen_string[aen & 0xff], aen >> 8);
} else {
printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
}
} else
printk(KERN_WARNING "3w-xxxx: Received AEN %d.\n", aen);
}
tw_dev->aen_count++;
queue = 1;
}
/* Now put the aen on the aen_queue */
if (queue == 1) {
tw_dev->aen_queue[tw_dev->aen_tail] = aen;
if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
tw_dev->aen_tail = TW_Q_START;
} else {
tw_dev->aen_tail = tw_dev->aen_tail + 1;
}
if (tw_dev->aen_head == tw_dev->aen_tail) {
if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
tw_dev->aen_head = TW_Q_START;
} else {
tw_dev->aen_head = tw_dev->aen_head + 1;
}
}
}
found = 1;
}
if (found == 0) {
printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Response never received.\n");
return 1;
}
} while (finished == 0);
return 0;
} /* End tw_aen_drain_queue() */
/* This function will allocate memory */
static int tw_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
{
int i;
dma_addr_t dma_handle;
unsigned long *cpu_addr = NULL;
dprintk(KERN_NOTICE "3w-xxxx: tw_allocate_memory()\n");
cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
if (cpu_addr == NULL) {
printk(KERN_WARNING "3w-xxxx: pci_alloc_consistent() failed.\n");
return 1;
}
if ((unsigned long)cpu_addr % (tw_dev->tw_pci_dev->device == TW_DEVICE_ID ? TW_ALIGNMENT_6000 : TW_ALIGNMENT_7000)) {
printk(KERN_WARNING "3w-xxxx: Couldn't allocate correctly aligned memory.\n");
pci_free_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, cpu_addr, dma_handle);
return 1;
}
memset(cpu_addr, 0, size*TW_Q_LENGTH);
for (i=0;i<TW_Q_LENGTH;i++) {
switch(which) {
case 0:
tw_dev->command_packet_physical_address[i] = dma_handle+(i*size);
tw_dev->command_packet_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
break;
case 1:
tw_dev->alignment_physical_address[i] = dma_handle+(i*size);
tw_dev->alignment_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
break;
default:
printk(KERN_WARNING "3w-xxxx: tw_allocate_memory(): case slip in tw_allocate_memory()\n");
return 1;
}
}
return 0;
} /* End tw_allocate_memory() */
/* This function handles ioctl for the character device */
static long tw_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
int request_id;
dma_addr_t dma_handle;
unsigned short tw_aen_code;
unsigned long flags;
unsigned int data_buffer_length = 0;
unsigned long data_buffer_length_adjusted = 0;
struct inode *inode = file->f_dentry->d_inode;
unsigned long *cpu_addr;
long timeout;
TW_New_Ioctl *tw_ioctl;
TW_Passthru *passthru;
TW_Device_Extension *tw_dev = tw_device_extension_list[iminor(inode)];
int retval = -EFAULT;
void __user *argp = (void __user *)arg;
dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl()\n");
mutex_lock(&tw_mutex);
/* Only let one of these through at a time */
if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
mutex_unlock(&tw_mutex);
return -EINTR;
}
/* First copy down the buffer length */
if (copy_from_user(&data_buffer_length, argp, sizeof(unsigned int)))
goto out;
/* Check size */
if (data_buffer_length > TW_MAX_IOCTL_SECTORS * 512) {
retval = -EINVAL;
goto out;
}
/* Hardware can only do multiple of 512 byte transfers */
data_buffer_length_adjusted = (data_buffer_length + 511) & ~511;
/* Now allocate ioctl buf memory */
cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, &dma_handle, GFP_KERNEL);
if (cpu_addr == NULL) {
retval = -ENOMEM;
goto out;
}
tw_ioctl = (TW_New_Ioctl *)cpu_addr;
/* Now copy down the entire ioctl */
if (copy_from_user(tw_ioctl, argp, data_buffer_length + sizeof(TW_New_Ioctl) - 1))
goto out2;
passthru = (TW_Passthru *)&tw_ioctl->firmware_command;
/* See which ioctl we are doing */
switch (cmd) {
case TW_OP_NOP:
dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_OP_NOP.\n");
break;
case TW_OP_AEN_LISTEN:
dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_AEN_LISTEN.\n");
memset(tw_ioctl->data_buffer, 0, data_buffer_length);
spin_lock_irqsave(tw_dev->host->host_lock, flags);
if (tw_dev->aen_head == tw_dev->aen_tail) {
tw_aen_code = TW_AEN_QUEUE_EMPTY;
} else {
tw_aen_code = tw_dev->aen_queue[tw_dev->aen_head];
if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
tw_dev->aen_head = TW_Q_START;
} else {
tw_dev->aen_head = tw_dev->aen_head + 1;
}
}
spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
memcpy(tw_ioctl->data_buffer, &tw_aen_code, sizeof(tw_aen_code));
break;
case TW_CMD_PACKET_WITH_DATA:
dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_CMD_PACKET_WITH_DATA.\n");
spin_lock_irqsave(tw_dev->host->host_lock, flags);
tw_state_request_start(tw_dev, &request_id);
/* Flag internal command */
tw_dev->srb[request_id] = NULL;
/* Flag chrdev ioctl */
tw_dev->chrdev_request_id = request_id;
tw_ioctl->firmware_command.request_id = request_id;
/* Load the sg list */
switch (TW_SGL_OUT(tw_ioctl->firmware_command.opcode__sgloffset)) {
case 2:
tw_ioctl->firmware_command.byte8.param.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
tw_ioctl->firmware_command.byte8.param.sgl[0].length = data_buffer_length_adjusted;
break;
case 3:
tw_ioctl->firmware_command.byte8.io.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
tw_ioctl->firmware_command.byte8.io.sgl[0].length = data_buffer_length_adjusted;
break;
case 5:
passthru->sg_list[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
passthru->sg_list[0].length = data_buffer_length_adjusted;
break;
}
memcpy(tw_dev->command_packet_virtual_address[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command));
/* Now post the command packet to the controller */
tw_post_command_packet(tw_dev, request_id);
spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
/* Now wait for the command to complete */
timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);