diff options
Diffstat (limited to 'drivers/scsi/3w-xxxx.c')
| -rw-r--r-- | drivers/scsi/3w-xxxx.c | 2430 |
1 files changed, 2430 insertions, 0 deletions
diff --git a/drivers/scsi/3w-xxxx.c b/drivers/scsi/3w-xxxx.c new file mode 100644 index 000000000..9bd70e461 --- /dev/null +++ b/drivers/scsi/3w-xxxx.c @@ -0,0 +1,2430 @@ +/* + 3w-xxxx.c -- 3ware Storage Controller device driver for Linux. + + Written By: Adam Radford <aradford@gmail.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: + + aradford@gmail.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 <linux/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) | SAM_STAT_CHECK_CONDITION; + 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; + + status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev)); + + while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) { + 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 attribute *tw_host_attrs[] = { + &tw_host_stats_attr.attr, + NULL, +}; + +ATTRIBUTE_GROUPS(tw_host); + +/* 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 = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev, + size * TW_Q_LENGTH, &dma_handle, GFP_KERNEL); + if (cpu_addr == NULL) { + printk(KERN_WARNING "3w-xxxx: dma_alloc_coherent() 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"); + dma_free_coherent(&tw_dev->tw_pci_dev->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), &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))) + 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); + 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); + 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); + 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)) + 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), 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"); + + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + + 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, + .compat_ioctl = compat_ptr_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]) + dma_free_coherent(&tw_dev->tw_pci_dev->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]) + dma_free_coherent(&tw_dev->tw_pci_dev->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); + 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); + 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; + + dprintk(KERN_NOTICE "3w-xxxx: tw_scsi_biosparam()\n"); + + 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); + 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); + 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 *) = scsi_done; + 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; + + /* 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); + scsi_build_sense(SCpnt, 1, 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) | SAM_STAT_CHECK_CONDITION; + } + + /* Now complete the io */ + if ((error != TW_ISR_DONT_COMPLETE)) { + scsi_dma_unmap(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, + .shost_groups = tw_host_groups, + .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; + + 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 = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); + 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."); + retval = -ENOMEM; + 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."); + retval = -ENOMEM; + goto out_release_mem_region; + } + + /* Disable interrupts on the card */ + TW_DISABLE_INTERRUPTS(tw_dev); + + /* Initialize the card */ + if (tw_reset_sequence(tw_dev)) { + retval = -EINVAL; + 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); + |