--- /dev/null
+/*
+ 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 <scsi/scsi_eh.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() */
+
+/* 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_inode(file);
+ 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);
+
+ /* We timed out, and didn't get an interrupt */
+ if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
+ /* Now we need to reset the board */
+ printk(KERN_WARNING "3w-xxxx: scsi%d: Character ioctl (0x%x) timed out, resetting card.\n", tw_dev->host->host_no, cmd);
+ retval = -EIO;
+ if (tw_reset_device_extension(tw_dev)) {
+ printk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): Reset failed for card %d.\n", tw_dev->host->host_no);
+ }
+ goto out2;
+ }
+
+ /* Now copy in the command packet response */
+ memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virtual_address[request_id], sizeof(TW_Command));
+
+ /* Now complete the io */
+ spin_lock_irqsave(tw_dev->host->host_lock, flags);
+ tw_dev->posted_request_count--;
+ tw_dev->state[request_id] = TW_S_COMPLETED;
+ tw_state_request_finish(tw_dev, request_id);
+ spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
+ break;
+ default:
+ retval = -ENOTTY;
+ goto out2;
+ }
+
+ /* Now copy the response to userspace */
+ if (copy_to_user(argp, tw_ioctl, sizeof(TW_New_Ioctl) + data_buffer_length - 1))
+ goto out2;
+ retval = 0;
+out2:
+ /* Now free ioctl buf memory */
+ dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, cpu_addr, dma_handle);
+out:
+ mutex_unlock(&tw_dev->ioctl_lock);
+ mutex_unlock(&tw_mutex);
+ return retval;
+} /* End tw_chrdev_ioctl() */
+
+/* This function handles open for the character device */
+/* NOTE that this function races with remove. */
+static int tw_chrdev_open(struct inode *inode, struct file *file)
+{
+ unsigned int minor_number;
+
+ dprintk(KERN_WARNING "3w-xxxx: tw_ioctl_open()\n");
+
+ minor_number = iminor(inode);
+ if (minor_number >= tw_device_extension_count)
+ return -ENODEV;
+
+ return 0;
+} /* End tw_chrdev_open() */
+
+/* File operations struct for character device */
+static const struct file_operations tw_fops = {
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = tw_chrdev_ioctl,
+ .open = tw_chrdev_open,
+ .release = NULL,
+ .llseek = noop_llseek,
+};
+
+/* This function will free up device extension resources */
+static void tw_free_device_extension(TW_Device_Extension *tw_dev)
+{
+ dprintk(KERN_NOTICE "3w-xxxx: tw_free_device_extension()\n");
+
+ /* Free command packet and generic buffer memory */
+ if (tw_dev->command_packet_virtual_address[0])
+ pci_free_consistent(tw_dev->tw_pci_dev, sizeof(TW_Command)*TW_Q_LENGTH, tw_dev->command_packet_virtual_address[0], tw_dev->command_packet_physical_address[0]);
+
+ if (tw_dev->alignment_virtual_address[0])
+ pci_free_consistent(tw_dev->tw_pci_dev, sizeof(TW_Sector)*TW_Q_LENGTH, tw_dev->alignment_virtual_address[0], tw_dev->alignment_physical_address[0]);
+} /* End tw_free_device_extension() */
+
+/* This function will send an initconnection command to controller */
+static int tw_initconnection(TW_Device_Extension *tw_dev, int message_credits)
+{
+ unsigned long command_que_value;
+ TW_Command *command_packet;
+ TW_Response_Queue response_queue;
+ int request_id = 0;
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_initconnection()\n");
+
+ /* Initialize InitConnection command packet */
+ if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
+ printk(KERN_WARNING "3w-xxxx: tw_initconnection(): 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(0, TW_OP_INIT_CONNECTION);
+ command_packet->size = TW_INIT_COMMAND_PACKET_SIZE;
+ command_packet->request_id = request_id;
+ command_packet->status = 0x0;
+ command_packet->flags = 0x0;
+ command_packet->byte6.message_credits = message_credits;
+ command_packet->byte8.init_connection.response_queue_pointer = 0x0;
+ command_que_value = tw_dev->command_packet_physical_address[request_id];
+
+ if (command_que_value == 0) {
+ printk(KERN_WARNING "3w-xxxx: tw_initconnection(): Bad command packet physical address.\n");
+ return 1;
+ }
+
+ /* Send command packet to the board */
+ outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
+
+ /* 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_initconnection(): Unexpected request id.\n");
+ return 1;
+ }
+ if (command_packet->status != 0) {
+ /* bad response */
+ tw_decode_sense(tw_dev, request_id, 0);
+ return 1;
+ }
+ }
+ return 0;
+} /* End tw_initconnection() */
+
+/* Set a value in the features table */
+static int tw_setfeature(TW_Device_Extension *tw_dev, int parm, int param_size,
+ unsigned char *val)
+{
+ TW_Param *param;
+ TW_Command *command_packet;
+ TW_Response_Queue response_queue;
+ int request_id = 0;
+ unsigned long command_que_value;
+ unsigned long param_value;
+
+ /* Initialize SetParam command packet */
+ if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
+ printk(KERN_WARNING "3w-xxxx: tw_setfeature(): 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));
+ param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
+
+ command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
+ param->table_id = 0x404; /* Features table */
+ param->parameter_id = parm;
+ param->parameter_size_bytes = param_size;
+ memcpy(param->data, val, param_size);
+
+ param_value = tw_dev->alignment_physical_address[request_id];
+ if (param_value == 0) {
+ printk(KERN_WARNING "3w-xxxx: tw_setfeature(): Bad alignment physical address.\n");
+ tw_dev->state[request_id] = TW_S_COMPLETED;
+ tw_state_request_finish(tw_dev, request_id);
+ tw_dev->srb[request_id]->result = (DID_OK << 16);
+ tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
+ }
+ command_packet->byte8.param.sgl[0].address = param_value;
+ command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
+
+ command_packet->size = 4;
+ command_packet->request_id = request_id;
+ 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_setfeature(): Bad command packet physical address.\n");
+ return 1;
+ }
+
+ /* Send command packet to the board */
+ outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
+
+ /* 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_setfeature(): Unexpected request id.\n");
+ return 1;
+ }
+ if (command_packet->status != 0) {
+ /* bad response */
+ tw_decode_sense(tw_dev, request_id, 0);
+ return 1;
+ }
+ }
+
+ return 0;
+} /* End tw_setfeature() */
+
+/* This function will reset a controller */
+static int tw_reset_sequence(TW_Device_Extension *tw_dev)
+{
+ int error = 0;
+ int tries = 0;
+ unsigned char c = 1;
+
+ /* Reset the board */
+ while (tries < TW_MAX_RESET_TRIES) {
+ TW_SOFT_RESET(tw_dev);
+
+ error = tw_aen_drain_queue(tw_dev);
+ if (error) {
+ printk(KERN_WARNING "3w-xxxx: scsi%d: AEN drain failed, retrying.\n", tw_dev->host->host_no);
+ tries++;
+ continue;
+ }
+
+ /* Check for controller errors */
+ if (tw_check_errors(tw_dev)) {
+ printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors found, retrying.\n", tw_dev->host->host_no);
+ tries++;
+ continue;
+ }
+
+ /* Now the controller is in a good state */
+ break;
+ }
+
+ if (tries >= TW_MAX_RESET_TRIES) {
+ printk(KERN_WARNING "3w-xxxx: scsi%d: Controller errors, card not responding, check all cabling.\n", tw_dev->host->host_no);
+ return 1;
+ }
+
+ error = tw_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS);
+ if (error) {
+ printk(KERN_WARNING "3w-xxxx: scsi%d: Connection initialization failed.\n", tw_dev->host->host_no);
+ return 1;
+ }
+
+ error = tw_setfeature(tw_dev, 2, 1, &c);
+ if (error) {
+ printk(KERN_WARNING "3w-xxxx: Unable to set features for card, probable old firmware or card.\n");
+ }
+
+ return 0;
+} /* End tw_reset_sequence() */
+
+/* This function will initialize the fields of a device extension */
+static int tw_initialize_device_extension(TW_Device_Extension *tw_dev)
+{
+ int i, error=0;
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_initialize_device_extension()\n");
+
+ /* Initialize command packet buffers */
+ error = tw_allocate_memory(tw_dev, sizeof(TW_Command), 0);
+ if (error) {
+ printk(KERN_WARNING "3w-xxxx: Command packet memory allocation failed.\n");
+ return 1;
+ }
+
+ /* Initialize generic buffer */
+ error = tw_allocate_memory(tw_dev, sizeof(TW_Sector), 1);
+ if (error) {
+ printk(KERN_WARNING "3w-xxxx: Generic memory allocation failed.\n");
+ return 1;
+ }
+
+ for (i=0;i<TW_Q_LENGTH;i++) {
+ tw_dev->free_queue[i] = i;
+ tw_dev->state[i] = TW_S_INITIAL;
+ }
+
+ tw_dev->pending_head = TW_Q_START;
+ tw_dev->pending_tail = TW_Q_START;
+ tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
+
+ mutex_init(&tw_dev->ioctl_lock);
+ init_waitqueue_head(&tw_dev->ioctl_wqueue);
+
+ return 0;
+} /* End tw_initialize_device_extension() */
+
+/* This function will reset a device extension */
+static int tw_reset_device_extension(TW_Device_Extension *tw_dev)
+{
+ int i = 0;
+ struct scsi_cmnd *srb;
+ unsigned long flags = 0;
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_reset_device_extension()\n");
+
+ set_bit(TW_IN_RESET, &tw_dev->flags);
+ TW_DISABLE_INTERRUPTS(tw_dev);
+ TW_MASK_COMMAND_INTERRUPT(tw_dev);
+ spin_lock_irqsave(tw_dev->host->host_lock, flags);
+
+ /* Abort all requests that are in progress */
+ for (i=0;i<TW_Q_LENGTH;i++) {
+ if ((tw_dev->state[i] != TW_S_FINISHED) &&
+ (tw_dev->state[i] != TW_S_INITIAL) &&
+ (tw_dev->state[i] != TW_S_COMPLETED)) {
+ srb = tw_dev->srb[i];
+ if (srb != NULL) {
+ srb->result = (DID_RESET << 16);
+ scsi_dma_unmap(srb);
+ srb->scsi_done(srb);
+ }
+ }
+ }
+
+ /* Reset queues and counts */
+ for (i=0;i<TW_Q_LENGTH;i++) {
+ tw_dev->free_queue[i] = i;
+ tw_dev->state[i] = TW_S_INITIAL;
+ }
+ tw_dev->free_head = TW_Q_START;
+ tw_dev->free_tail = TW_Q_START;
+ tw_dev->posted_request_count = 0;
+ tw_dev->pending_request_count = 0;
+ tw_dev->pending_head = TW_Q_START;
+ tw_dev->pending_tail = TW_Q_START;
+ tw_dev->reset_print = 0;
+
+ spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
+
+ if (tw_reset_sequence(tw_dev)) {
+ printk(KERN_WARNING "3w-xxxx: scsi%d: Reset sequence failed.\n", tw_dev->host->host_no);
+ return 1;
+ }
+
+ TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
+ clear_bit(TW_IN_RESET, &tw_dev->flags);
+ tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
+
+ return 0;
+} /* End tw_reset_device_extension() */
+
+/* This funciton returns unit geometry in cylinders/heads/sectors */
+static int tw_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev,
+ sector_t capacity, int geom[])
+{
+ int heads, sectors, cylinders;
+ TW_Device_Extension *tw_dev;
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam()\n");
+ tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
+
+ heads = 64;
+ sectors = 32;
+ cylinders = sector_div(capacity, heads * sectors);
+
+ if (capacity >= 0x200000) {
+ heads = 255;
+ sectors = 63;
+ cylinders = sector_div(capacity, heads * sectors);
+ }
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam(): heads = %d, sectors = %d, cylinders = %d\n", heads, sectors, cylinders);
+ geom[0] = heads;
+ geom[1] = sectors;
+ geom[2] = cylinders;
+
+ return 0;
+} /* End tw_scsi_biosparam() */
+
+/* This is the new scsi eh reset function */
+static int tw_scsi_eh_reset(struct scsi_cmnd *SCpnt)
+{
+ TW_Device_Extension *tw_dev=NULL;
+ int retval = FAILED;
+
+ tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
+
+ tw_dev->num_resets++;
+
+ sdev_printk(KERN_WARNING, SCpnt->device,
+ "WARNING: Command (0x%x) timed out, resetting card.\n",
+ SCpnt->cmnd[0]);
+
+ /* Make sure we are not issuing an ioctl or resetting from ioctl */
+ mutex_lock(&tw_dev->ioctl_lock);
+
+ /* Now reset the card and some of the device extension data */
+ if (tw_reset_device_extension(tw_dev)) {
+ printk(KERN_WARNING "3w-xxxx: scsi%d: Reset failed.\n", tw_dev->host->host_no);
+ goto out;
+ }
+
+ retval = SUCCESS;
+out:
+ mutex_unlock(&tw_dev->ioctl_lock);
+ return retval;
+} /* End tw_scsi_eh_reset() */
+
+/* This function handles scsi inquiry commands */
+static int tw_scsiop_inquiry(TW_Device_Extension *tw_dev, int request_id)
+{
+ TW_Param *param;
+ TW_Command *command_packet;
+ unsigned long command_que_value;
+ unsigned long param_value;
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry()\n");
+
+ /* Initialize command packet */
+ command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
+ if (command_packet == NULL) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet virtual address.\n");
+ return 1;
+ }
+ 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;
+
+ /* Now setup the param */
+ if (tw_dev->alignment_virtual_address[request_id] == NULL) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): 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 = 3; /* unit summary table */
+ param->parameter_id = 3; /* unitsstatus parameter */
+ param->parameter_size_bytes = TW_MAX_UNITS;
+ param_value = tw_dev->alignment_physical_address[request_id];
+ if (param_value == 0) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): 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);
+ command_que_value = tw_dev->command_packet_physical_address[request_id];
+ if (command_que_value == 0) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry(): Bad command packet physical address.\n");
+ return 1;
+ }
+
+ /* Now try to post the command packet */
+ tw_post_command_packet(tw_dev, request_id);
+
+ return 0;
+} /* End tw_scsiop_inquiry() */
+
+static void tw_transfer_internal(TW_Device_Extension *tw_dev, int request_id,
+ void *data, unsigned int len)
+{
+ scsi_sg_copy_from_buffer(tw_dev->srb[request_id], data, len);
+}
+
+/* This function is called by the isr to complete an inquiry command */
+static int tw_scsiop_inquiry_complete(TW_Device_Extension *tw_dev, int request_id)
+{
+ unsigned char *is_unit_present;
+ unsigned char request_buffer[36];
+ TW_Param *param;
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_inquiry_complete()\n");
+
+ memset(request_buffer, 0, sizeof(request_buffer));
+ request_buffer[0] = TYPE_DISK; /* Peripheral device type */
+ request_buffer[1] = 0; /* Device type modifier */
+ request_buffer[2] = 0; /* No ansi/iso compliance */
+ request_buffer[4] = 31; /* Additional length */
+ memcpy(&request_buffer[8], "3ware ", 8); /* Vendor ID */
+ sprintf(&request_buffer[16], "Logical Disk %-2d ", tw_dev->srb[request_id]->device->id);
+ memcpy(&request_buffer[32], TW_DRIVER_VERSION, 3);
+ tw_transfer_internal(tw_dev, request_id, request_buffer,
+ sizeof(request_buffer));
+
+ param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
+ if (param == NULL) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_inquiry_complete(): Bad alignment virtual address.\n");
+ return 1;
+ }
+ is_unit_present = &(param->data[0]);
+
+ if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
+ tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
+ } else {
+ tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
+ tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
+ return TW_ISR_DONT_RESULT;
+ }
+
+ return 0;
+} /* End tw_scsiop_inquiry_complete() */
+
+/* This function handles scsi mode_sense commands */
+static int tw_scsiop_mode_sense(TW_Device_Extension *tw_dev, int request_id)
+{
+ TW_Param *param;
+ TW_Command *command_packet;
+ unsigned long command_que_value;
+ unsigned long param_value;
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense()\n");
+
+ /* Only page control = 0, page code = 0x8 (cache page) supported */
+ if (tw_dev->srb[request_id]->cmnd[2] != 0x8) {
+ tw_dev->state[request_id] = TW_S_COMPLETED;
+ tw_state_request_finish(tw_dev, request_id);
+ tw_dev->srb[request_id]->result = (DID_OK << 16);
+ tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
+ return 0;
+ }
+
+ /* Now read firmware cache setting for this unit */
+ command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
+ if (command_packet == NULL) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet virtual address.\n");
+ return 1;
+ }
+
+ /* Setup the command packet */
+ 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;
+
+ /* Setup the param */
+ if (tw_dev->alignment_virtual_address[request_id] == NULL) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): 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 = TW_UNIT_INFORMATION_TABLE_BASE + tw_dev->srb[request_id]->device->id;
+ param->parameter_id = 7; /* unit flags */
+ param->parameter_size_bytes = 1;
+ param_value = tw_dev->alignment_physical_address[request_id];
+ if (param_value == 0) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): 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);
+ command_que_value = tw_dev->command_packet_physical_address[request_id];
+ if (command_que_value == 0) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense(): Bad command packet physical address.\n");
+ return 1;
+ }
+
+ /* Now try to post the command packet */
+ tw_post_command_packet(tw_dev, request_id);
+
+ return 0;
+} /* End tw_scsiop_mode_sense() */
+
+/* This function is called by the isr to complete a mode sense command */
+static int tw_scsiop_mode_sense_complete(TW_Device_Extension *tw_dev, int request_id)
+{
+ TW_Param *param;
+ unsigned char *flags;
+ unsigned char request_buffer[8];
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_mode_sense_complete()\n");
+
+ param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
+ if (param == NULL) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_mode_sense_complete(): Bad alignment virtual address.\n");
+ return 1;
+ }
+ flags = (char *)&(param->data[0]);
+ memset(request_buffer, 0, sizeof(request_buffer));
+
+ request_buffer[0] = 0xf; /* mode data length */
+ request_buffer[1] = 0; /* default medium type */
+ request_buffer[2] = 0x10; /* dpo/fua support on */
+ request_buffer[3] = 0; /* no block descriptors */
+ request_buffer[4] = 0x8; /* caching page */
+ request_buffer[5] = 0xa; /* page length */
+ if (*flags & 0x1)
+ request_buffer[6] = 0x5; /* WCE on, RCD on */
+ else
+ request_buffer[6] = 0x1; /* WCE off, RCD on */
+ tw_transfer_internal(tw_dev, request_id, request_buffer,
+ sizeof(request_buffer));
+
+ return 0;
+} /* End tw_scsiop_mode_sense_complete() */
+
+/* This function handles scsi read_capacity commands */
+static int tw_scsiop_read_capacity(TW_Device_Extension *tw_dev, int request_id)
+{
+ TW_Param *param;
+ TW_Command *command_packet;
+ unsigned long command_que_value;
+ unsigned long param_value;
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity()\n");
+
+ /* Initialize command packet */
+ command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
+
+ if (command_packet == NULL) {
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet virtual address.\n");
+ return 1;
+ }
+ 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->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->id);
+ command_packet->status = 0;
+ command_packet->flags = 0;
+ command_packet->byte6.block_count = 1;
+
+ /* Now setup the param */
+ if (tw_dev->alignment_virtual_address[request_id] == NULL) {
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): 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 = TW_UNIT_INFORMATION_TABLE_BASE +
+ tw_dev->srb[request_id]->device->id;
+ param->parameter_id = 4; /* unitcapacity parameter */
+ param->parameter_size_bytes = 4;
+ param_value = tw_dev->alignment_physical_address[request_id];
+ if (param_value == 0) {
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): 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);
+ command_que_value = tw_dev->command_packet_physical_address[request_id];
+ if (command_que_value == 0) {
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity(): Bad command packet physical address.\n");
+ return 1;
+ }
+
+ /* Now try to post the command to the board */
+ tw_post_command_packet(tw_dev, request_id);
+
+ return 0;
+} /* End tw_scsiop_read_capacity() */
+
+/* This function is called by the isr to complete a readcapacity command */
+static int tw_scsiop_read_capacity_complete(TW_Device_Extension *tw_dev, int request_id)
+{
+ unsigned char *param_data;
+ u32 capacity;
+ char buff[8];
+ TW_Param *param;
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete()\n");
+
+ memset(buff, 0, sizeof(buff));
+ param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
+ if (param == NULL) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_capacity_complete(): Bad alignment virtual address.\n");
+ return 1;
+ }
+ param_data = &(param->data[0]);
+
+ capacity = (param_data[3] << 24) | (param_data[2] << 16) |
+ (param_data[1] << 8) | param_data[0];
+
+ /* Subtract one sector to fix get last sector ioctl */
+ capacity -= 1;
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_capacity_complete(): Capacity = 0x%x.\n", capacity);
+
+ /* Number of LBA's */
+ buff[0] = (capacity >> 24);
+ buff[1] = (capacity >> 16) & 0xff;
+ buff[2] = (capacity >> 8) & 0xff;
+ buff[3] = capacity & 0xff;
+
+ /* Block size in bytes (512) */
+ buff[4] = (TW_BLOCK_SIZE >> 24);
+ buff[5] = (TW_BLOCK_SIZE >> 16) & 0xff;
+ buff[6] = (TW_BLOCK_SIZE >> 8) & 0xff;
+ buff[7] = TW_BLOCK_SIZE & 0xff;
+
+ tw_transfer_internal(tw_dev, request_id, buff, sizeof(buff));
+
+ return 0;
+} /* End tw_scsiop_read_capacity_complete() */
+
+/* This function handles scsi read or write commands */
+static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id)
+{
+ TW_Command *command_packet;
+ unsigned long command_que_value;
+ u32 lba = 0x0, num_sectors = 0x0;
+ int i, use_sg;
+ struct scsi_cmnd *srb;
+ struct scatterlist *sglist, *sg;
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write()\n");
+
+ srb = tw_dev->srb[request_id];
+
+ sglist = scsi_sglist(srb);
+ if (!sglist) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Request buffer NULL.\n");
+ return 1;
+ }
+
+ /* Initialize command packet */
+ command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
+ if (command_packet == NULL) {
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): Bad command packet virtual address.\n");
+ return 1;
+ }
+
+ if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == READ_10) {
+ command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_READ);
+ } else {
+ command_packet->opcode__sgloffset = TW_OPSGL_IN(3, TW_OP_WRITE);
+ }
+
+ command_packet->size = 3;
+ command_packet->request_id = request_id;
+ command_packet->unit__hostid = TW_UNITHOST_IN(0, srb->device->id);
+ command_packet->status = 0;
+ command_packet->flags = 0;
+
+ if (srb->cmnd[0] == WRITE_10) {
+ if ((srb->cmnd[1] & 0x8) || (srb->cmnd[1] & 0x10))
+ command_packet->flags = 1;
+ }
+
+ if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6) {
+ lba = ((u32)srb->cmnd[1] << 16) | ((u32)srb->cmnd[2] << 8) | (u32)srb->cmnd[3];
+ num_sectors = (u32)srb->cmnd[4];
+ } else {
+ lba = ((u32)srb->cmnd[2] << 24) | ((u32)srb->cmnd[3] << 16) | ((u32)srb->cmnd[4] << 8) | (u32)srb->cmnd[5];
+ num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
+ }
+
+ /* Update sector statistic */
+ tw_dev->sector_count = num_sectors;
+ if (tw_dev->sector_count > tw_dev->max_sector_count)
+ tw_dev->max_sector_count = tw_dev->sector_count;
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_read_write(): lba = 0x%x num_sectors = 0x%x\n", lba, num_sectors);
+ command_packet->byte8.io.lba = lba;
+ command_packet->byte6.block_count = num_sectors;
+
+ use_sg = scsi_dma_map(srb);
+ if (use_sg <= 0)
+ return 1;
+
+ scsi_for_each_sg(tw_dev->srb[request_id], sg, use_sg, i) {
+ command_packet->byte8.io.sgl[i].address = sg_dma_address(sg);
+ command_packet->byte8.io.sgl[i].length = sg_dma_len(sg);
+ command_packet->size+=2;
+ }
+
+ /* Update SG statistics */
+ tw_dev->sgl_entries = scsi_sg_count(tw_dev->srb[request_id]);
+ if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
+ tw_dev->max_sgl_entries = tw_dev->sgl_entries;
+
+ command_que_value = tw_dev->command_packet_physical_address[request_id];
+ if (command_que_value == 0) {
+ dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_read_write(): Bad command packet physical address.\n");
+ return 1;
+ }
+
+ /* Now try to post the command to the board */
+ tw_post_command_packet(tw_dev, request_id);
+
+ return 0;
+} /* End tw_scsiop_read_write() */
+
+/* This function will handle the request sense scsi command */
+static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id)
+{
+ char request_buffer[18];
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n");
+
+ memset(request_buffer, 0, sizeof(request_buffer));
+ request_buffer[0] = 0x70; /* Immediate fixed format */
+ request_buffer[7] = 10; /* minimum size per SPC: 18 bytes */
+ /* leave all other fields zero, giving effectively NO_SENSE return */
+ tw_transfer_internal(tw_dev, request_id, request_buffer,
+ sizeof(request_buffer));
+
+ tw_dev->state[request_id] = TW_S_COMPLETED;
+ tw_state_request_finish(tw_dev, request_id);
+
+ /* If we got a request_sense, we probably want a reset, return error */
+ tw_dev->srb[request_id]->result = (DID_ERROR << 16);
+ tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
+
+ return 0;
+} /* End tw_scsiop_request_sense() */
+
+/* This function will handle synchronize cache scsi command */
+static int tw_scsiop_synchronize_cache(TW_Device_Extension *tw_dev, int request_id)
+{
+ TW_Command *command_packet;
+ unsigned long command_que_value;
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_synchronize_cache()\n");
+
+ /* Send firmware flush command for this unit */
+ command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
+ if (command_packet == NULL) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_synchronize_cache(): Bad command packet virtual address.\n");
+ return 1;
+ }
+
+ /* Setup the command packet */
+ memset(command_packet, 0, sizeof(TW_Sector));
+ command_packet->opcode__sgloffset = TW_OPSGL_IN(0, TW_OP_FLUSH_CACHE);
+ command_packet->size = 2;
+ command_packet->request_id = request_id;
+ command_packet->unit__hostid = TW_UNITHOST_IN(0, tw_dev->srb[request_id]->device->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_scsiop_synchronize_cache(): Bad command packet physical address.\n");
+ return 1;
+ }
+
+ /* Now try to post the command packet */
+ tw_post_command_packet(tw_dev, request_id);
+
+ return 0;
+} /* End tw_scsiop_synchronize_cache() */
+
+/* This function will handle test unit ready scsi command */
+static int tw_scsiop_test_unit_ready(TW_Device_Extension *tw_dev, int request_id)
+{
+ TW_Param *param;
+ TW_Command *command_packet;
+ unsigned long command_que_value;
+ unsigned long param_value;
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_test_unit_ready()\n");
+
+ /* Initialize command packet */
+ command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
+ if (command_packet == NULL) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet virtual address.\n");
+ return 1;
+ }
+ 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;
+
+ /* Now setup the param */
+ if (tw_dev->alignment_virtual_address[request_id] == NULL) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): 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 = 3; /* unit summary table */
+ param->parameter_id = 3; /* unitsstatus parameter */
+ param->parameter_size_bytes = TW_MAX_UNITS;
+ param_value = tw_dev->alignment_physical_address[request_id];
+ if (param_value == 0) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): 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);
+ command_que_value = tw_dev->command_packet_physical_address[request_id];
+ if (command_que_value == 0) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready(): Bad command packet physical address.\n");
+ return 1;
+ }
+
+ /* Now try to post the command packet */
+ tw_post_command_packet(tw_dev, request_id);
+
+ return 0;
+} /* End tw_scsiop_test_unit_ready() */
+
+/* This function is called by the isr to complete a testunitready command */
+static int tw_scsiop_test_unit_ready_complete(TW_Device_Extension *tw_dev, int request_id)
+{
+ unsigned char *is_unit_present;
+ TW_Param *param;
+
+ dprintk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete()\n");
+
+ param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
+ if (param == NULL) {
+ printk(KERN_WARNING "3w-xxxx: tw_scsiop_test_unit_ready_complete(): Bad alignment virtual address.\n");
+ return 1;
+ }
+ is_unit_present = &(param->data[0]);
+
+ if (is_unit_present[tw_dev->srb[request_id]->device->id] & TW_UNIT_ONLINE) {
+ tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 1;
+ } else {
+ tw_dev->is_unit_present[tw_dev->srb[request_id]->device->id] = 0;
+ tw_dev->srb[request_id]->result = (DID_BAD_TARGET << 16);
+ return TW_ISR_DONT_RESULT;
+ }
+
+ return 0;
+} /* End tw_scsiop_test_unit_ready_complete() */
+
+/* This is the main scsi queue function to handle scsi opcodes */
+static int tw_scsi_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
+{
+ unsigned char *command = SCpnt->cmnd;
+ int request_id = 0;
+ int retval = 1;
+ TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
+
+ /* If we are resetting due to timed out ioctl, report as busy */
+ if (test_bit(TW_IN_RESET, &tw_dev->flags))
+ return SCSI_MLQUEUE_HOST_BUSY;
+
+ /* Save done function into Scsi_Cmnd struct */
+ SCpnt->scsi_done = done;
+
+ /* Queue the command and get a request id */
+ tw_state_request_start(tw_dev, &request_id);
+
+ /* Save the scsi command for use by the ISR */
+ tw_dev->srb[request_id] = SCpnt;
+
+ switch (*command) {
+ case READ_10:
+ case READ_6:
+ case WRITE_10:
+ case WRITE_6:
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ/WRITE.\n");
+ retval = tw_scsiop_read_write(tw_dev, request_id);
+ break;
+ case TEST_UNIT_READY:
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught TEST_UNIT_READY.\n");
+ retval = tw_scsiop_test_unit_ready(tw_dev, request_id);
+ break;
+ case INQUIRY:
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught INQUIRY.\n");
+ retval = tw_scsiop_inquiry(tw_dev, request_id);
+ break;
+ case READ_CAPACITY:
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught READ_CAPACITY.\n");
+ retval = tw_scsiop_read_capacity(tw_dev, request_id);
+ break;
+ case REQUEST_SENSE:
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught REQUEST_SENSE.\n");
+ retval = tw_scsiop_request_sense(tw_dev, request_id);
+ break;
+ case MODE_SENSE:
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught MODE_SENSE.\n");
+ retval = tw_scsiop_mode_sense(tw_dev, request_id);
+ break;
+ case SYNCHRONIZE_CACHE:
+ dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_queue(): caught SYNCHRONIZE_CACHE.\n");
+ retval = tw_scsiop_synchronize_cache(tw_dev, request_id);
+ break;
+ case TW_IOCTL:
+ printk(KERN_WARNING "3w-xxxx: SCSI_IOCTL_SEND_COMMAND deprecated, please update your 3ware tools.\n");
+ break;
+ default:
+ printk(KERN_NOTICE "3w-xxxx: scsi%d: Unknown scsi opcode: 0x%x\n", tw_dev->host->host_no, *command);
+ tw_dev->state[request_id] = TW_S_COMPLETED;
+ tw_state_request_finish(tw_dev, request_id);
+ SCpnt->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
+ scsi_build_sense_buffer(1, SCpnt->sense_buffer, ILLEGAL_REQUEST, 0x20, 0);
+ done(SCpnt);
+ retval = 0;
+ }
+ if (retval) {
+ tw_dev->state[request_id] = TW_S_COMPLETED;
+ tw_state_request_finish(tw_dev, request_id);
+ SCpnt->result = (DID_ERROR << 16);
+ done(SCpnt);
+ retval = 0;
+ }
+ return retval;
+} /* End tw_scsi_queue() */
+
+static DEF_SCSI_QCMD(tw_scsi_queue)
+
+/* This function is the interrupt service routine */
+static irqreturn_t tw_interrupt(int irq, void *dev_instance)
+{
+ int request_id;
+ u32 status_reg_value;
+ TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
+ TW_Response_Queue response_que;
+ int error = 0, retval = 0;
+ TW_Command *command_packet;
+ int handled = 0;
+
+ /* Get the host lock for io completions */
+ spin_lock(tw_dev->host->host_lock);
+
+ /* Read the registers */
+ status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
+
+ /* Check if this is our interrupt, otherwise bail */
+ if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
+ goto tw_interrupt_bail;
+
+ handled = 1;
+
+ /* If we are resetting, bail */
+ if (test_bit(TW_IN_RESET, &tw_dev->flags))
+ goto tw_interrupt_bail;
+
+ /* Check controller for errors */
+ if (tw_check_bits(status_reg_value)) {
+ dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
+ if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
+ TW_CLEAR_ALL_INTERRUPTS(tw_dev);
+ goto tw_interrupt_bail;
+ }
+ }
+
+ /* Handle host interrupt */
+ if (status_reg_value & TW_STATUS_HOST_INTERRUPT) {
+ dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received host interrupt.\n");
+ TW_CLEAR_HOST_INTERRUPT(tw_dev);
+ }
+
+ /* Handle attention interrupt */
+ if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
+ dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Received attention interrupt.\n");
+ TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
+ tw_state_request_start(tw_dev, &request_id);
+ error = tw_aen_read_queue(tw_dev, request_id);
+ if (error) {
+ printk(KERN_WARNING "3w-xxxx: scsi%d: Error reading aen queue.\n", tw_dev->host->host_no);
+ tw_dev->state[request_id] = TW_S_COMPLETED;
+ tw_state_request_finish(tw_dev, request_id);
+ }
+ }
+
+ /* Handle command interrupt */
+ if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
+ /* Drain as many pending commands as we can */
+ while (tw_dev->pending_request_count > 0) {
+ request_id = tw_dev->pending_queue[tw_dev->pending_head];
+ if (tw_dev->state[request_id] != TW_S_PENDING) {
+ printk(KERN_WARNING "3w-xxxx: scsi%d: Found request id that wasn't pending.\n", tw_dev->host->host_no);
+ break;
+ }
+ if (tw_post_command_packet(tw_dev, request_id)==0) {
+ if (tw_dev->pending_head == TW_Q_LENGTH-1) {
+ tw_dev->pending_head = TW_Q_START;
+ } else {
+ tw_dev->pending_head = tw_dev->pending_head + 1;
+ }
+ tw_dev->pending_request_count--;
+ } else {
+ /* If we get here, we will continue re-posting on the next command interrupt */
+ break;
+ }
+ }
+ /* If there are no more pending requests, we mask command interrupt */
+ if (tw_dev->pending_request_count == 0)
+ TW_MASK_COMMAND_INTERRUPT(tw_dev);
+ }
+
+ /* Handle response interrupt */
+ if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
+ /* Drain the response queue from the board */
+ while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
+ /* Read response queue register */
+ response_que.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
+ request_id = TW_RESID_OUT(response_que.response_id);
+ command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
+ error = 0;
+
+ /* Check for bad response */
+ if (command_packet->status != 0) {
+ /* If internal command, don't error, don't fill sense */
+ if (tw_dev->srb[request_id] == NULL) {
+ tw_decode_sense(tw_dev, request_id, 0);
+ } else {
+ error = tw_decode_sense(tw_dev, request_id, 1);
+ }
+ }
+
+ /* Check for correct state */
+ if (tw_dev->state[request_id] != TW_S_POSTED) {
+ if (tw_dev->srb[request_id] != NULL) {
+ printk(KERN_WARNING "3w-xxxx: scsi%d: Received a request id that wasn't posted.\n", tw_dev->host->host_no);
+ error = 1;
+ }
+ }
+
+ dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): Response queue request id: %d.\n", request_id);
+
+ /* Check for internal command completion */
+ if (tw_dev->srb[request_id] == NULL) {
+ dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Found internally posted command.\n");
+ /* Check for chrdev ioctl completion */
+ if (request_id != tw_dev->chrdev_request_id) {
+ retval = tw_aen_complete(tw_dev, request_id);
+ if (retval) {
+ printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing aen.\n", tw_dev->host->host_no);
+ }
+ } else {
+ tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
+ wake_up(&tw_dev->ioctl_wqueue);
+ }
+ } else {
+ switch (tw_dev->srb[request_id]->cmnd[0]) {
+ case READ_10:
+ case READ_6:
+ dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_10/READ_6\n");
+ break;
+ case WRITE_10:
+ case WRITE_6:
+ dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught WRITE_10/WRITE_6\n");
+ break;
+ case TEST_UNIT_READY:
+ dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught TEST_UNIT_READY\n");
+ error = tw_scsiop_test_unit_ready_complete(tw_dev, request_id);
+ break;
+ case INQUIRY:
+ dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught INQUIRY\n");
+ error = tw_scsiop_inquiry_complete(tw_dev, request_id);
+ break;
+ case READ_CAPACITY:
+ dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught READ_CAPACITY\n");
+ error = tw_scsiop_read_capacity_complete(tw_dev, request_id);
+ break;
+ case MODE_SENSE:
+ dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught MODE_SENSE\n");
+ error = tw_scsiop_mode_sense_complete(tw_dev, request_id);
+ break;
+ case SYNCHRONIZE_CACHE:
+ dprintk(KERN_NOTICE "3w-xxxx: tw_interrupt(): caught SYNCHRONIZE_CACHE\n");
+ break;
+ default:
+ printk(KERN_WARNING "3w-xxxx: case slip in tw_interrupt()\n");
+ error = 1;
+ }
+
+ /* If no error command was a success */
+ if (error == 0) {
+ tw_dev->srb[request_id]->result = (DID_OK << 16);
+ }
+
+ /* If error, command failed */
+ if (error == 1) {
+ /* Ask for a host reset */
+ tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
+ }
+
+ /* Now complete the io */
+ if ((error != TW_ISR_DONT_COMPLETE)) {
+ scsi_dma_unmap(tw_dev->srb[request_id]);
+ tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
+ tw_dev->state[request_id] = TW_S_COMPLETED;
+ tw_state_request_finish(tw_dev, request_id);
+ tw_dev->posted_request_count--;
+ }
+ }
+
+ /* Check for valid status after each drain */
+ status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
+ if (tw_check_bits(status_reg_value)) {
+ dprintk(KERN_WARNING "3w-xxxx: tw_interrupt(): Unexpected bits.\n");
+ if (tw_decode_bits(tw_dev, status_reg_value, 1)) {
+ TW_CLEAR_ALL_INTERRUPTS(tw_dev);
+ goto tw_interrupt_bail;
+ }
+ }
+ }
+ }
+
+tw_interrupt_bail:
+ spin_unlock(tw_dev->host->host_lock);
+ return IRQ_RETVAL(handled);
+} /* End tw_interrupt() */
+
+/* This function tells the controller to shut down */
+static void __tw_shutdown(TW_Device_Extension *tw_dev)
+{
+ /* Disable interrupts */
+ TW_DISABLE_INTERRUPTS(tw_dev);
+
+ /* Free up the IRQ */
+ free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
+
+ printk(KERN_WARNING "3w-xxxx: Shutting down host %d.\n", tw_dev->host->host_no);
+
+ /* Tell the card we are shutting down */
+ if (tw_initconnection(tw_dev, 1)) {
+ printk(KERN_WARNING "3w-xxxx: Connection shutdown failed.\n");
+ } else {
+ printk(KERN_WARNING "3w-xxxx: Shutdown complete.\n");
+ }
+
+ /* Clear all interrupts just before exit */
+ TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
+} /* End __tw_shutdown() */
+
+/* Wrapper for __tw_shutdown */
+static void tw_shutdown(struct pci_dev *pdev)
+{
+ struct Scsi_Host *host = pci_get_drvdata(pdev);
+ TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
+
+ __tw_shutdown(tw_dev);
+} /* End tw_shutdown() */
+
+/* This function gets called when a disk is coming online */
+static int tw_slave_configure(struct scsi_device *sdev)
+{
+ /* Force 60 second timeout */
+ blk_queue_rq_timeout(sdev->request_queue, 60 * HZ);
+
+ return 0;
+} /* End tw_slave_configure() */
+
+static struct scsi_host_template driver_template = {
+ .module = THIS_MODULE,
+ .name = "3ware Storage Controller",
+ .queuecommand = tw_scsi_queue,
+ .eh_host_reset_handler = tw_scsi_eh_reset,
+ .bios_param = tw_scsi_biosparam,
+ .change_queue_depth = scsi_change_queue_depth,
+ .can_queue = TW_Q_LENGTH-2,
+ .slave_configure = tw_slave_configure,
+ .this_id = -1,
+ .sg_tablesize = TW_MAX_SGL_LENGTH,
+ .max_sectors = TW_MAX_SECTORS,
+ .cmd_per_lun = TW_MAX_CMDS_PER_LUN,
+ .use_clustering = ENABLE_CLUSTERING,
+ .shost_attrs = tw_host_attrs,
+ .emulated = 1,
+ .no_write_same = 1,
+};
+
+/* This function will probe and initialize a card */
+static int tw_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
+{
+ struct Scsi_Host *host = NULL;
+ TW_Device_Extension *tw_dev;
+ int retval = -ENODEV;
+
+ retval = pci_enable_device(pdev);
+ if (retval) {
+ printk(KERN_WARNING "3w-xxxx: Failed to enable pci device.");
+ goto out_disable_device;
+ }
+
+ pci_set_master(pdev);
+
+ retval = pci_set_dma_mask(pdev, TW_DMA_MASK);
+ if (retval) {
+ printk(KERN_WARNING "3w-xxxx: Failed to set dma mask.");
+ goto out_disable_device;
+ }
+
+ host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
+ if (!host) {
+ printk(KERN_WARNING "3w-xxxx: Failed to allocate memory for device extension.");
+ retval = -ENOMEM;
+ goto out_disable_device;
+ }
+ tw_dev = (TW_Device_Extension *)host->hostdata;
+
+ /* Save values to device extension */
+ tw_dev->host = host;
+ tw_dev->tw_pci_dev = pdev;
+
+ if (tw_initialize_device_extension(tw_dev)) {
+ printk(KERN_WARNING "3w-xxxx: Failed to initialize device extension.");
+ goto out_free_device_extension;
+ }
+
+ /* Request IO regions */
+ retval = pci_request_regions(pdev, "3w-xxxx");
+ if (retval) {
+ printk(KERN_WARNING "3w-xxxx: Failed to get mem region.");
+ goto out_free_device_extension;
+ }
+
+ /* Save base address */
+ tw_dev->base_addr = pci_resource_start(pdev, 0);
+ if (!tw_dev->base_addr) {
+ printk(KERN_WARNING "3w-xxxx: Failed to get io address.");
+ goto out_release_mem_region;
+ }
+
+ /* Disable interrupts on the card */
+ TW_DISABLE_INTERRUPTS(tw_dev);
+
+ /* Initialize the card */
+ if (tw_reset_sequence(tw_dev))
+ goto out_release_mem_region;
+
+ /* Set host specific parameters */
+ host->max_id = TW_MAX_UNITS;
+ host->max_cmd_len = TW_MAX_CDB_LEN;
+
+ /* Luns and channels aren't supported by adapter */
+ host->max_lun = 0;
+ host->max_channel = 0;
+
+ /* Register the card with the kernel SCSI layer */
+ retval = scsi_add_host(host, &pdev->dev);
+ if (retval) {
+ printk(KERN_WARNING "3w-xxxx: scsi add host failed");
+ goto out_release_mem_region;
+ }
+
+ pci_set_drvdata(pdev, host);
+
+ printk(KERN_WARNING "3w-xxxx: scsi%d: Found a 3ware Storage Controller at 0x%x, IRQ: %d.\n", host->host_no, tw_dev->base_addr, pdev->irq);
+
+ /* Now setup the interrupt handler */
+ retval = request_irq(pdev->irq, tw_interrupt, IRQF_SHARED, "3w-xxxx", tw_dev);
+ if (retval) {
+ printk(KERN_WARNING "3w-xxxx: Error requesting IRQ.");
+ goto out_remove_host;
+ }
+
+ tw_device_extension_list[tw_device_extension_count] = tw_dev;
+ tw_device_extension_count++;
+
+ /* Re-enable interrupts on the card */
+ TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
+
+ /* Finally, scan the host */
+ scsi_scan_host(host);
+
+ if (twe_major == -1) {
+ if ((twe_major = register_chrdev (0, "twe", &tw_fops)) < 0)
+ printk(KERN_WARNING "3w-xxxx: Failed to register character device.");
+ }
+ return 0;
+
+out_remove_host:
+ scsi_remove_host(host);
+out_release_mem_region:
+ pci_release_regions(pdev);
+out_free_device_extension:
+ tw_free_device_extension(tw_dev);
+ scsi_host_put(host);
+out_disable_device:
+ pci_disable_device(pdev);
+
+ return retval;
+} /* End tw_probe() */
+
+/* This function is called to remove a device */
+static void tw_remove(struct pci_dev *pdev)
+{
+ struct Scsi_Host *host = pci_get_drvdata(pdev);
+ TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
+
+ scsi_remove_host(tw_dev->host);
+
+ /* Unregister character device */
+ if (twe_major >= 0) {
+ unregister_chrdev(twe_major, "twe");
+ twe_major = -1;
+ }
+
+ /* Shutdown the card */
+ __tw_shutdown(tw_dev);
+
+ /* Free up the mem region */
+ pci_release_regions(pdev);
+
+ /* Free up device extension resources */
+ tw_free_device_extension(tw_dev);
+
+ scsi_host_put(tw_dev->host);
+ pci_disable_device(pdev);
+ tw_device_extension_count--;
+} /* End tw_remove() */
+
+/* PCI Devices supported by this driver */
+static struct pci_device_id tw_pci_tbl[] = {
+ { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_1000,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_7000,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ { }
+};
+MODULE_DEVICE_TABLE(pci, tw_pci_tbl);
+
+/* pci_driver initializer */
+static struct pci_driver tw_driver = {
+ .name = "3w-xxxx",
+ .id_table = tw_pci_tbl,
+ .probe = tw_probe,
+ .remove = tw_remove,
+ .shutdown = tw_shutdown,
+};
+
+/* This function is called on driver initialization */
+static int __init tw_init(void)
+{
+ printk(KERN_WARNING "3ware Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
+
+ return pci_register_driver(&tw_driver);
+} /* End tw_init() */
+
+/* This function is called on driver exit */
+static void __exit tw_exit(void)
+{
+ pci_unregister_driver(&tw_driver);
+} /* End tw_exit() */
+
+module_init(tw_init);
+module_exit(tw_exit);
+
Code Review / kvmfornfv.git / blobdiff