diff options
Diffstat (limited to 'drivers/scsi/3w-9xxx.c')
| -rw-r--r-- | drivers/scsi/3w-9xxx.c | 2167 |
1 files changed, 2167 insertions, 0 deletions
diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c new file mode 100644 index 000000000000..a2b18f5a4f93 --- /dev/null +++ b/drivers/scsi/3w-9xxx.c @@ -0,0 +1,2167 @@ +/* + 3w-9xxx.c -- 3ware 9000 Storage Controller device driver for Linux. + + Written By: Adam Radford <linuxraid@amcc.com> + + Copyright (C) 2004-2005 Applied Micro Circuits Corporation. + + 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@amcc.com + + For more information, goto: + http://www.amcc.com + + Note: This version of the driver does not contain a bundled firmware + image. + + History + ------- + 2.26.02.000 - Driver cleanup for kernel submission. + 2.26.02.001 - Replace schedule_timeout() calls with msleep(). + 2.26.02.002 - Add support for PAE mode. + Add lun support. + Fix twa_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. + Remove un-needed eh_abort handler. + Add support for embedded firmware error strings. +*/ + +#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/pci.h> +#include <linux/time.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/uaccess.h> +#include <scsi/scsi.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_tcq.h> +#include <scsi/scsi_cmnd.h> +#include "3w-9xxx.h" + +/* Globals */ +#define TW_DRIVER_VERSION "2.26.02.002" +static TW_Device_Extension *twa_device_extension_list[TW_MAX_SLOT]; +static unsigned int twa_device_extension_count; +static int twa_major = -1; +extern struct timezone sys_tz; + +/* Module parameters */ +MODULE_AUTHOR ("AMCC"); +MODULE_DESCRIPTION ("3ware 9000 Storage Controller Linux Driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(TW_DRIVER_VERSION); + +/* Function prototypes */ +static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header); +static int twa_aen_read_queue(TW_Device_Extension *tw_dev, int request_id); +static char *twa_aen_severity_lookup(unsigned char severity_code); +static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id); +static int twa_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg); +static int twa_chrdev_open(struct inode *inode, struct file *file); +static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_sense, int print_host); +static void twa_free_request_id(TW_Device_Extension *tw_dev,int request_id); +static void twa_get_request_id(TW_Device_Extension *tw_dev, int *request_id); +static int twa_initconnection(TW_Device_Extension *tw_dev, int message_credits, + u32 set_features, unsigned short current_fw_srl, + unsigned short current_fw_arch_id, + unsigned short current_fw_branch, + unsigned short current_fw_build, + unsigned short *fw_on_ctlr_srl, + unsigned short *fw_on_ctlr_arch_id, + unsigned short *fw_on_ctlr_branch, + unsigned short *fw_on_ctlr_build, + u32 *init_connect_result); +static void twa_load_sgl(TW_Command_Full *full_command_packet, int request_id, dma_addr_t dma_handle, int length); +static int twa_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds); +static int twa_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds); +static int twa_post_command_packet(TW_Device_Extension *tw_dev, int request_id, char internal); +static int twa_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset); +static int twa_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset); +static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry *sglistarg); +static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int request_id); +static char *twa_string_lookup(twa_message_type *table, unsigned int aen_code); +static void twa_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id); + +/* Functions */ + +/* Show some statistics about the card */ +static ssize_t twa_show_stats(struct class_device *class_dev, char *buf) +{ + struct Scsi_Host *host = class_to_shost(class_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-9xxx 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 twa_show_stats() */ + +/* This function will set a devices queue depth */ +static int twa_change_queue_depth(struct scsi_device *sdev, int queue_depth) +{ + if (queue_depth > TW_Q_LENGTH-2) + queue_depth = TW_Q_LENGTH-2; + scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth); + return queue_depth; +} /* End twa_change_queue_depth() */ + +/* Create sysfs 'stats' entry */ +static struct class_device_attribute twa_host_stats_attr = { + .attr = { + .name = "stats", + .mode = S_IRUGO, + }, + .show = twa_show_stats +}; + +/* Host attributes initializer */ +static struct class_device_attribute *twa_host_attrs[] = { + &twa_host_stats_attr, + NULL, +}; + +/* File operations struct for character device */ +static struct file_operations twa_fops = { + .owner = THIS_MODULE, + .ioctl = twa_chrdev_ioctl, + .open = twa_chrdev_open, + .release = NULL +}; + +/* This function will complete an aen request from the isr */ +static int twa_aen_complete(TW_Device_Extension *tw_dev, int request_id) +{ + TW_Command_Full *full_command_packet; + TW_Command *command_packet; + TW_Command_Apache_Header *header; + unsigned short aen; + int retval = 1; + + header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id]; + tw_dev->posted_request_count--; + aen = header->status_block.error; + full_command_packet = tw_dev->command_packet_virt[request_id]; + command_packet = &full_command_packet->command.oldcommand; + + /* First check for internal completion of set param for time sync */ + if (TW_OP_OUT(command_packet->opcode__sgloffset) == TW_OP_SET_PARAM) { + /* Keep reading the queue in case there are more aen's */ + if (twa_aen_read_queue(tw_dev, request_id)) + goto out2; + else { + retval = 0; + goto out; + } + } + + switch (aen) { + case TW_AEN_QUEUE_EMPTY: + /* Quit reading the queue if this is the last one */ + break; + case TW_AEN_SYNC_TIME_WITH_HOST: + twa_aen_sync_time(tw_dev, request_id); + retval = 0; + goto out; + default: + twa_aen_queue_event(tw_dev, header); + + /* If there are more aen's, keep reading the queue */ + if (twa_aen_read_queue(tw_dev, request_id)) + goto out2; + else { + retval = 0; + goto out; + } + } + retval = 0; +out2: + tw_dev->state[request_id] = TW_S_COMPLETED; + twa_free_request_id(tw_dev, request_id); + clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags); +out: + return retval; +} /* End twa_aen_complete() */ + +/* This function will drain aen queue */ +static int twa_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset) +{ + int request_id = 0; + char cdb[TW_MAX_CDB_LEN]; + TW_SG_Entry sglist[1]; + int finished = 0, count = 0; + TW_Command_Full *full_command_packet; + TW_Command_Apache_Header *header; + unsigned short aen; + int first_reset = 0, queue = 0, retval = 1; + + if (no_check_reset) + first_reset = 0; + else + first_reset = 1; + + full_command_packet = tw_dev->command_packet_virt[request_id]; + memset(full_command_packet, 0, sizeof(TW_Command_Full)); + + /* Initialize cdb */ + memset(&cdb, 0, TW_MAX_CDB_LEN); + cdb[0] = REQUEST_SENSE; /* opcode */ + cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */ + + /* Initialize sglist */ + memset(&sglist, 0, sizeof(TW_SG_Entry)); + sglist[0].length = TW_SECTOR_SIZE; + sglist[0].address = tw_dev->generic_buffer_phys[request_id]; + + if (sglist[0].address & TW_ALIGNMENT_9000_SGL) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Found unaligned address during AEN drain"); + goto out; + } + + /* Mark internal command */ + tw_dev->srb[request_id] = NULL; + + do { + /* Send command to the board */ + if (twa_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2, "Error posting request sense"); + goto out; + } + + /* Now poll for completion */ + if (twa_poll_response(tw_dev, request_id, 30)) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x3, "No valid response while draining AEN queue"); + tw_dev->posted_request_count--; + goto out; + } + + tw_dev->posted_request_count--; + header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id]; + aen = header->status_block.error; + queue = 0; + count++; + + switch (aen) { + case TW_AEN_QUEUE_EMPTY: + if (first_reset != 1) + goto out; + else + finished = 1; + break; + case TW_AEN_SOFT_RESET: + if (first_reset == 0) + first_reset = 1; + else + queue = 1; + break; + case TW_AEN_SYNC_TIME_WITH_HOST: + break; + default: + queue = 1; + } + + /* Now queue an event info */ + if (queue) + twa_aen_queue_event(tw_dev, header); + } while ((finished == 0) && (count < TW_MAX_AEN_DRAIN)); + + if (count == TW_MAX_AEN_DRAIN) + goto out; + + retval = 0; +out: + tw_dev->state[request_id] = TW_S_INITIAL; + return retval; +} /* End twa_aen_drain_queue() */ + +/* This function will queue an event */ +static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header) +{ + u32 local_time; + struct timeval time; + TW_Event *event; + unsigned short aen; + char host[16]; + char *error_str; + + tw_dev->aen_count++; + + /* Fill out event info */ + event = tw_dev->event_queue[tw_dev->error_index]; + + /* Check for clobber */ + host[0] = '\0'; + if (tw_dev->host) { + sprintf(host, " scsi%d:", tw_dev->host->host_no); + if (event->retrieved == TW_AEN_NOT_RETRIEVED) + tw_dev->aen_clobber = 1; + } + + aen = header->status_block.error; + memset(event, 0, sizeof(TW_Event)); + + event->severity = TW_SEV_OUT(header->status_block.severity__reserved); + do_gettimeofday(&time); + local_time = (u32)(time.tv_sec - (sys_tz.tz_minuteswest * 60)); + event->time_stamp_sec = local_time; + event->aen_code = aen; + event->retrieved = TW_AEN_NOT_RETRIEVED; + event->sequence_id = tw_dev->error_sequence_id; + tw_dev->error_sequence_id++; + + /* Check for embedded error string */ + error_str = &(header->err_specific_desc[strlen(header->err_specific_desc)+1]); + + header->err_specific_desc[sizeof(header->err_specific_desc) - 1] = '\0'; + event->parameter_len = strlen(header->err_specific_desc); + memcpy(event->parameter_data, header->err_specific_desc, event->parameter_len); + if (event->severity != TW_AEN_SEVERITY_DEBUG) + printk(KERN_WARNING "3w-9xxx:%s AEN: %s (0x%02X:0x%04X): %s:%s.\n", + host, + twa_aen_severity_lookup(TW_SEV_OUT(header->status_block.severity__reserved)), + TW_MESSAGE_SOURCE_CONTROLLER_EVENT, aen, + error_str[0] == '\0' ? twa_string_lookup(twa_aen_table, aen) : error_str, + header->err_specific_desc); + else + tw_dev->aen_count--; + + if ((tw_dev->error_index + 1) == TW_Q_LENGTH) + tw_dev->event_queue_wrapped = 1; + tw_dev->error_index = (tw_dev->error_index + 1 ) % TW_Q_LENGTH; +} /* End twa_aen_queue_event() */ + +/* This function will read the aen queue from the isr */ +static int twa_aen_read_queue(TW_Device_Extension *tw_dev, int request_id) +{ + char cdb[TW_MAX_CDB_LEN]; + TW_SG_Entry sglist[1]; + TW_Command_Full *full_command_packet; + int retval = 1; + + full_command_packet = tw_dev->command_packet_virt[request_id]; + memset(full_command_packet, 0, sizeof(TW_Command_Full)); + + /* Initialize cdb */ + memset(&cdb, 0, TW_MAX_CDB_LEN); + cdb[0] = REQUEST_SENSE; /* opcode */ + cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */ + + /* Initialize sglist */ + memset(&sglist, 0, sizeof(TW_SG_Entry)); + sglist[0].length = TW_SECTOR_SIZE; + sglist[0].address = tw_dev->generic_buffer_phys[request_id]; + + /* Mark internal command */ + tw_dev->srb[request_id] = NULL; + + /* Now post the command packet */ + if (twa_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x4, "Post failed while reading AEN queue"); + goto out; + } + retval = 0; +out: + return retval; +} /* End twa_aen_read_queue() */ + +/* This function will look up an AEN severity string */ +static char *twa_aen_severity_lookup(unsigned char severity_code) +{ + char *retval = NULL; + + if ((severity_code < (unsigned char) TW_AEN_SEVERITY_ERROR) || + (severity_code > (unsigned char) TW_AEN_SEVERITY_DEBUG)) + goto out; + + retval = twa_aen_severity_table[severity_code]; +out: + return retval; +} /* End twa_aen_severity_lookup() */ + +/* This function will sync firmware time with the host time */ +static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id) +{ + u32 schedulertime; + struct timeval utc; + TW_Command_Full *full_command_packet; + TW_Command *command_packet; + TW_Param_Apache *param; + u32 local_time; + + /* Fill out the command packet */ + full_command_packet = tw_dev->command_packet_virt[request_id]; + memset(full_command_packet, 0, sizeof(TW_Command_Full)); + command_packet = &full_command_packet->command.oldcommand; + command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM); + command_packet->request_id = request_id; + command_packet->byte8_offset.param.sgl[0].address = tw_dev->generic_buffer_phys[request_id]; + command_packet->byte8_offset.param.sgl[0].length = TW_SECTOR_SIZE; + command_packet->size = TW_COMMAND_SIZE; + command_packet->byte6_offset.parameter_count = 1; + + /* Setup the param */ + param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id]; + memset(param, 0, TW_SECTOR_SIZE); + param->table_id = TW_TIMEKEEP_TABLE | 0x8000; /* Controller time keep table */ + param->parameter_id = 0x3; /* SchedulerTime */ + param->parameter_size_bytes = 4; + + /* Convert system time in UTC to local time seconds since last + Sunday 12:00AM */ + do_gettimeofday(&utc); + local_time = (u32)(utc.tv_sec - (sys_tz.tz_minuteswest * 60)); + schedulertime = local_time - (3 * 86400); + schedulertime = schedulertime % 604800; + + memcpy(param->data, &schedulertime, sizeof(u32)); + + /* Mark internal command */ + tw_dev->srb[request_id] = NULL; + + /* Now post the command */ + twa_post_command_packet(tw_dev, request_id, 1); +} /* End twa_aen_sync_time() */ + +/* This function will allocate memory and check if it is correctly aligned */ +static int twa_allocate_memory(TW_Device_Extension *tw_dev, int size, int which) +{ + int i; + dma_addr_t dma_handle; + unsigned long *cpu_addr; + int retval = 1; + + cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle); + if (!cpu_addr) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed"); + goto out; + } + + if ((unsigned long)cpu_addr % (TW_ALIGNMENT_9000)) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x6, "Failed to allocate correctly aligned memory"); + pci_free_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, cpu_addr, dma_handle); + goto out; + } + + memset(cpu_addr, 0, size*TW_Q_LENGTH); + + for (i = 0; i < TW_Q_LENGTH; i++) { + switch(which) { + case 0: + tw_dev->command_packet_phys[i] = dma_handle+(i*size); + tw_dev->command_packet_virt[i] = (TW_Command_Full *)((unsigned char *)cpu_addr + (i*size)); + break; + case 1: + tw_dev->generic_buffer_phys[i] = dma_handle+(i*size); + tw_dev->generic_buffer_virt[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size)); + break; + } + } + retval = 0; +out: + return retval; +} /* End twa_allocate_memory() */ + +/* This function will check the status register for unexpected bits */ +static int twa_check_bits(u32 status_reg_value) +{ + int retval = 1; + + if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS) + goto out; + if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0) + goto out; + + retval = 0; +out: + return retval; +} /* End twa_check_bits() */ + +/* This function will check the srl and decide if we are compatible */ +static int twa_check_srl(TW_Device_Extension *tw_dev, int *flashed) +{ + int retval = 1; + unsigned short fw_on_ctlr_srl = 0, fw_on_ctlr_arch_id = 0; + unsigned short fw_on_ctlr_branch = 0, fw_on_ctlr_build = 0; + u32 init_connect_result = 0; + + if (twa_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS, + TW_EXTENDED_INIT_CONNECT, TW_CURRENT_DRIVER_SRL, + TW_9000_ARCH_ID, TW_CURRENT_DRIVER_BRANCH, + TW_CURRENT_DRIVER_BUILD, &fw_on_ctlr_srl, + &fw_on_ctlr_arch_id, &fw_on_ctlr_branch, + &fw_on_ctlr_build, &init_connect_result)) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x7, "Initconnection failed while checking SRL"); + goto out; + } + + tw_dev->working_srl = fw_on_ctlr_srl; + tw_dev->working_branch = fw_on_ctlr_branch; + tw_dev->working_build = fw_on_ctlr_build; + + /* Try base mode compatibility */ + if (!(init_connect_result & TW_CTLR_FW_COMPATIBLE)) { + if (twa_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS, + TW_EXTENDED_INIT_CONNECT, + TW_BASE_FW_SRL, TW_9000_ARCH_ID, + TW_BASE_FW_BRANCH, TW_BASE_FW_BUILD, + &fw_on_ctlr_srl, &fw_on_ctlr_arch_id, + &fw_on_ctlr_branch, &fw_on_ctlr_build, + &init_connect_result)) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0xa, "Initconnection (base mode) failed while checking SRL"); + goto out; + } + if (!(init_connect_result & TW_CTLR_FW_COMPATIBLE)) { + if (TW_CURRENT_DRIVER_SRL > fw_on_ctlr_srl) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x32, "Firmware and driver incompatibility: please upgrade firmware"); + } else { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x33, "Firmware and driver incompatibility: please upgrade driver"); + } + goto out; + } + tw_dev->working_srl = TW_BASE_FW_SRL; + tw_dev->working_branch = TW_BASE_FW_BRANCH; + tw_dev->working_build = TW_BASE_FW_BUILD; + } + retval = 0; +out: + return retval; +} /* End twa_check_srl() */ + +/* This function handles ioctl for the character device */ +static int twa_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) +{ + long timeout; + unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0; + dma_addr_t dma_handle; + int request_id = 0; + unsigned int sequence_id = 0; + unsigned char event_index, start_index; + TW_Ioctl_Driver_Command driver_command; + TW_Ioctl_Buf_Apache *tw_ioctl; + TW_Lock *tw_lock; + TW_Command_Full *full_command_packet; + TW_Compatibility_Info *tw_compat_info; + TW_Event *event; + struct timeval current_time; + u32 current_time_ms; + TW_Device_Extension *tw_dev = twa_device_extension_list[iminor(inode)]; + int retval = TW_IOCTL_ERROR_OS_EFAULT; + void __user *argp = (void __user *)arg; + + /* Only let one of these through at a time */ + if (down_interruptible(&tw_dev->ioctl_sem)) { + retval = TW_IOCTL_ERROR_OS_EINTR; + goto out; + } + + /* First copy down the driver command */ + if (copy_from_user(&driver_command, argp, sizeof(TW_Ioctl_Driver_Command))) + goto out2; + + /* Check data buffer size */ + if (driver_command.buffer_length > TW_MAX_SECTORS * 512) { + retval = TW_IOCTL_ERROR_OS_EINVAL; + goto out2; + } + + /* Hardware can only do multiple of 512 byte transfers */ + data_buffer_length_adjusted = (driver_command.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_Ioctl_Buf_Apache) - 1, &dma_handle, GFP_KERNEL); + if (!cpu_addr) { + retval = TW_IOCTL_ERROR_OS_ENOMEM; + goto out2; + } + + tw_ioctl = (TW_Ioctl_Buf_Apache *)cpu_addr; + + /* Now copy down the entire ioctl */ + if (copy_from_user(tw_ioctl, argp, driver_command.buffer_length + sizeof(TW_Ioctl_Buf_Apache) - 1)) + goto out3; + + /* See which ioctl we are doing */ + switch (cmd) { + case TW_IOCTL_FIRMWARE_PASS_THROUGH: + spin_lock_irqsave(tw_dev->host->host_lock, flags); + twa_get_request_id(tw_dev, &request_id); + + /* Flag internal command */ + tw_dev->srb[request_id] = NULL; + + /* Flag chrdev ioctl */ + tw_dev->chrdev_request_id = request_id; + + full_command_packet = &tw_ioctl->firmware_command; + + /* Load request id and sglist for both command types */ + twa_load_sgl(full_command_packet, request_id, dma_handle, data_buffer_length_adjusted); + + memcpy(tw_dev->command_packet_virt[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command_Full)); + + /* Now post the command packet to the controller */ + twa_post_command_packet(tw_dev, request_id, 1); + spin_unlock_irqrestore(tw_dev->host->host_lock, flags); + + timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ; + + /* Now wait for command to complete */ + timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout); + + /* See if we reset while waiting for the ioctl to complete */ + if (test_bit(TW_IN_RESET, &tw_dev->flags)) { + clear_bit(TW_IN_RESET, &tw_dev->flags); + retval = TW_IOCTL_ERROR_OS_ERESTARTSYS; + goto out3; + } + + /* 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-9xxx: scsi%d: WARNING: (0x%02X:0x%04X): Character ioctl (0x%x) timed out, resetting card.\n", + tw_dev->host->host_no, TW_DRIVER, 0xc, + cmd); + retval = TW_IOCTL_ERROR_OS_EIO; + spin_lock_irqsave(tw_dev->host->host_lock, flags); + tw_dev->state[request_id] = TW_S_COMPLETED; + twa_free_request_id(tw_dev, request_id); + tw_dev->posted_request_count--; + spin_unlock_irqrestore(tw_dev->host->host_lock, flags); + twa_reset_device_extension(tw_dev, 1); + goto out3; + } + + /* Now copy in the command packet response */ + memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virt[request_id], sizeof(TW_Command_Full)); + + /* 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; + twa_free_request_id(tw_dev, request_id); + spin_unlock_irqrestore(tw_dev->host->host_lock, flags); + break; + case TW_IOCTL_GET_COMPATIBILITY_INFO: + tw_ioctl->driver_command.status = 0; + /* Copy compatiblity struct into ioctl data buffer */ + tw_compat_info = (TW_Compatibility_Info *)tw_ioctl->data_buffer; + strncpy(tw_compat_info->driver_version, TW_DRIVER_VERSION, strlen(TW_DRIVER_VERSION)); + tw_compat_info->working_srl = tw_dev->working_srl; + tw_compat_info->working_branch = tw_dev->working_branch; + tw_compat_info->working_build = tw_dev->working_build; + tw_compat_info->driver_srl_high = TW_CURRENT_DRIVER_SRL; + tw_compat_info->driver_branch_high = TW_CURRENT_DRIVER_BRANCH; + tw_compat_info->driver_build_high = TW_CURRENT_DRIVER_BUILD; + tw_compat_info->driver_srl_low = TW_BASE_FW_SRL; + tw_compat_info->driver_branch_low = TW_BASE_FW_BRANCH; + tw_compat_info->driver_build_low = TW_BASE_FW_BUILD; + break; + case TW_IOCTL_GET_LAST_EVENT: + if (tw_dev->event_queue_wrapped) { + if (tw_dev->aen_clobber) { + tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER; + tw_dev->aen_clobber = 0; + } else + tw_ioctl->driver_command.status = 0; + } else { + if (!tw_dev->error_index) { + tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS; + break; + } + tw_ioctl->driver_command.status = 0; + } + event_index = (tw_dev->error_index - 1 + TW_Q_LENGTH) % TW_Q_LENGTH; + memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event)); + tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED; + break; + case TW_IOCTL_GET_FIRST_EVENT: + if (tw_dev->event_queue_wrapped) { + if (tw_dev->aen_clobber) { + tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER; + tw_dev->aen_clobber = 0; + } else + tw_ioctl->driver_command.status = 0; + event_index = tw_dev->error_index; + } else { + if (!tw_dev->error_index) { + tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS; + break; + } + tw_ioctl->driver_command.status = 0; + event_index = 0; + } + memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event)); + tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED; + break; + case TW_IOCTL_GET_NEXT_EVENT: + event = (TW_Event *)tw_ioctl->data_buffer; + sequence_id = event->sequence_id; + tw_ioctl->driver_command.status = 0; + + if (tw_dev->event_queue_wrapped) { + if (tw_dev->aen_clobber) { + tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER; + tw_dev->aen_clobber = 0; + } + start_index = tw_dev->error_index; + } else { + if (!tw_dev->error_index) { + tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS; + break; + } + start_index = 0; + } + event_index = (start_index + sequence_id - tw_dev->event_queue[start_index]->sequence_id + 1) % TW_Q_LENGTH; + + if (!(tw_dev->event_queue[event_index]->sequence_id > sequence_id)) { + if (tw_ioctl->driver_command.status == TW_IOCTL_ERROR_STATUS_AEN_CLOBBER) + tw_dev->aen_clobber = 1; + tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS; + break; + } + memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event)); + tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED; + break; + case TW_IOCTL_GET_PREVIOUS_EVENT: + event = (TW_Event *)tw_ioctl->data_buffer; + sequence_id = event->sequence_id; + tw_ioctl->driver_command.status = 0; + + if (tw_dev->event_queue_wrapped) { + if (tw_dev->aen_clobber) { + tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER; + tw_dev->aen_clobber = 0; + } + start_index = tw_dev->error_index; + } else { + if (!tw_dev->error_index) { + tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS; + break; + } + start_index = 0; + } + event_index = (start_index + sequence_id - tw_dev->event_queue[start_index]->sequence_id - 1) % TW_Q_LENGTH; + + if (!(tw_dev->event_queue[event_index]->sequence_id < sequence_id)) { + if (tw_ioctl->driver_command.status == TW_IOCTL_ERROR_STATUS_AEN_CLOBBER) + tw_dev->aen_clobber = 1; + tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS; + break; + } + memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event)); + tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED; + break; + case TW_IOCTL_GET_LOCK: + tw_lock = (TW_Lock *)tw_ioctl->data_buffer; + do_gettimeofday(¤t_time); + current_time_ms = (current_time.tv_sec * 1000) + (current_time.tv_usec / 1000); + + if ((tw_lock->force_flag == 1) || (tw_dev->ioctl_sem_lock == 0) || (current_time_ms >= tw_dev->ioctl_msec)) { + tw_dev->ioctl_sem_lock = 1; + tw_dev->ioctl_msec = current_time_ms + tw_lock->timeout_msec; + tw_ioctl->driver_command.status = 0; + tw_lock->time_remaining_msec = tw_lock->timeout_msec; + } else { + tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_LOCKED; + tw_lock->time_remaining_msec = tw_dev->ioctl_msec - current_time_ms; + } + break; + case TW_IOCTL_RELEASE_LOCK: + if (tw_dev->ioctl_sem_lock == 1) { + tw_dev->ioctl_sem_lock = 0; + tw_ioctl->driver_command.status = 0; + } else { + tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NOT_LOCKED; + } + break; + default: + retval = TW_IOCTL_ERROR_OS_ENOTTY; + goto out3; + } + + /* Now copy the entire response to userspace */ + if (copy_to_user(argp, tw_ioctl, sizeof(TW_Ioctl_Buf_Apache) + driver_command.buffer_length - 1) == 0) + retval = 0; +out3: + /* Now free ioctl buf memory */ + dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, cpu_addr, dma_handle); +out2: + up(&tw_dev->ioctl_sem); +out: + return retval; +} /* End twa_chrdev_ioctl() */ + +/* This function handles open for the character device */ +static int twa_chrdev_open(struct inode *inode, struct file *file) +{ + unsigned int minor_number; + int retval = TW_IOCTL_ERROR_OS_ENODEV; + + minor_number = iminor(inode); + if (minor_number >= twa_device_extension_count) + goto out; + retval = 0; +out: + return retval; +} /* End twa_chrdev_open() */ + +/* This function will print readable messages from status register errors */ +static int twa_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value) +{ + int retval = 1; + + /* Check for various error conditions and handle them appropriately */ + if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0xc, "PCI Parity Error: clearing"); + writel(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev)); + } + + if (status_reg_value & TW_STATUS_PCI_ABORT) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0xd, "PCI Abort: clearing"); + writel(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) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0xe, "Controller Queue Error: clearing"); + writel(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev)); + } + + if (status_reg_value & TW_STATUS_SBUF_WRITE_ERROR) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0xf, "SBUF Write Error: clearing"); + writel(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) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x10, "Microcontroller Error: clearing"); + tw_dev->reset_print = 1; + } + goto out; + } + retval = 0; +out: + return retval; +} /* End twa_decode_bits() */ + +/* This function will empty the response queue */ +static int twa_empty_response_queue(TW_Device_Extension *tw_dev) +{ + u32 status_reg_value, response_que_value; + int count = 0, retval = 1; + + status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev)); + + while (((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) && (count < TW_MAX_RESPONSE_DRAIN)) { + response_que_value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev)); + status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev)); + count++; + } + if (count == TW_MAX_RESPONSE_DRAIN) + goto out; + + retval = 0; +out: + return retval; +} /* End twa_empty_response_queue() */ + +/* This function passes sense keys from firmware to scsi layer */ +static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_sense, int print_host) +{ + TW_Command_Full *full_command_packet; + unsigned short error; + int retval = 1; + char *error_str; + + full_command_packet = tw_dev->command_packet_virt[request_id]; + + /* Check for embedded error string */ + error_str = &(full_command_packet->header.err_specific_desc[strlen(full_command_packet->header.err_specific_desc) + 1]); + + /* Don't print error for Logical unit not supported during rollcall */ + error = full_command_packet->header.status_block.error; + if ((error != TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED) && (error != TW_ERROR_UNIT_OFFLINE)) { + if (print_host) + printk(KERN_WARNING "3w-9xxx: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n", + tw_dev->host->host_no, + TW_MESSAGE_SOURCE_CONTROLLER_ERROR, + full_command_packet->header.status_block.error, + error_str[0] == '\0' ? + twa_string_lookup(twa_error_table, + full_command_packet->header.status_block.error) : error_str, + full_command_packet->header.err_specific_desc); + else + printk(KERN_WARNING "3w-9xxx: ERROR: (0x%02X:0x%04X): %s:%s.\n", + TW_MESSAGE_SOURCE_CONTROLLER_ERROR, + full_command_packet->header.status_block.error, + error_str[0] == '\0' ? + twa_string_lookup(twa_error_table, + full_command_packet->header.status_block.error) : error_str, + full_command_packet->header.err_specific_desc); + } + + if (copy_sense) { + memcpy(tw_dev->srb[request_id]->sense_buffer, full_command_packet->header.sense_data, TW_SENSE_DATA_LENGTH); + tw_dev->srb[request_id]->result = (full_command_packet->command.newcommand.status << 1); + retval = TW_ISR_DONT_RESULT; + goto out; + } + retval = 0; +out: + return retval; +} /* End twa_fill_sense() */ + +/* This function will free up device extension resources */ +static void twa_free_device_extension(TW_Device_Extension *tw_dev) +{ + if (tw_dev->command_packet_virt[0]) + pci_free_consistent(tw_dev->tw_pci_dev, + sizeof(TW_Command_Full)*TW_Q_LENGTH, + tw_dev->command_packet_virt[0], + tw_dev->command_packet_phys[0]); + + if (tw_dev->generic_buffer_virt[0]) + pci_free_consistent(tw_dev->tw_pci_dev, + TW_SECTOR_SIZE*TW_Q_LENGTH, + tw_dev->generic_buffer_virt[0], + tw_dev->generic_buffer_phys[0]); + + if (tw_dev->event_queue[0]) + kfree(tw_dev->event_queue[0]); +} /* End twa_free_device_extension() */ + +/* This function will free a request id */ +static void twa_free_request_id(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 twa_free_request_id() */ + +/* This function will get parameter table entires from the firmware */ +static void *twa_get_param(TW_Device_Extension *tw_dev, int request_id, int table_id, int parameter_id, int parameter_size_bytes) +{ + TW_Command_Full *full_command_packet; + TW_Command *command_packet; + TW_Param_Apache *param; + unsigned long param_value; + void *retval = NULL; + + /* Setup the command packet */ + full_command_packet = tw_dev->command_packet_virt[request_id]; + memset(full_command_packet, 0, sizeof(TW_Command_Full)); + command_packet = &full_command_packet->command.oldcommand; + + command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM); + command_packet->size = TW_COMMAND_SIZE; + command_packet->request_id = request_id; + command_packet->byte6_offset.block_count = 1; + + /* Now setup the param */ + param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id]; + memset(param, 0, TW_SECTOR_SIZE); + param->table_id = table_id | 0x8000; + param->parameter_id = parameter_id; + param->parameter_size_bytes = parameter_size_bytes; + param_value = tw_dev->generic_buffer_phys[request_id]; + + command_packet->byte8_offset.param.sgl[0].address = param_value; + command_packet->byte8_offset.param.sgl[0].length = TW_SECTOR_SIZE; + + /* Post the command packet to the board */ + twa_post_command_packet(tw_dev, request_id, 1); + + /* Poll for completion */ + if (twa_poll_response(tw_dev, request_id, 30)) + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x13, "No valid response during get param") + else + retval = (void *)&(param->data[0]); + + tw_dev->posted_request_count--; + tw_dev->state[request_id] = TW_S_INITIAL; + + return retval; +} /* End twa_get_param() */ + +/* This function will assign an available request id */ +static void twa_get_request_id(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 twa_get_request_id() */ + +/* This function will send an initconnection command to controller */ +static int twa_initconnection(TW_Device_Extension *tw_dev, int message_credits, + u32 set_features, unsigned short current_fw_srl, + unsigned short current_fw_arch_id, + unsigned short current_fw_branch, + unsigned short current_fw_build, + unsigned short *fw_on_ctlr_srl, + unsigned short *fw_on_ctlr_arch_id, + unsigned short *fw_on_ctlr_branch, + unsigned short *fw_on_ctlr_build, + u32 *init_connect_result) +{ + TW_Command_Full *full_command_packet; + TW_Initconnect *tw_initconnect; + int request_id = 0, retval = 1; + + /* Initialize InitConnection command packet */ + full_command_packet = tw_dev->command_packet_virt[request_id]; + memset(full_command_packet, 0, sizeof(TW_Command_Full)); + full_command_packet->header.header_desc.size_header = 128; + + tw_initconnect = (TW_Initconnect *)&full_command_packet->command.oldcommand; + tw_initconnect->opcode__reserved = TW_OPRES_IN(0, TW_OP_INIT_CONNECTION); + tw_initconnect->request_id = request_id; + tw_initconnect->message_credits = message_credits; + tw_initconnect->features = set_features; + + /* Turn on 64-bit sgl support if we need to */ + tw_initconnect->features |= sizeof(dma_addr_t) > 4 ? 1 : 0; + + if (set_features & TW_EXTENDED_INIT_CONNECT) { + tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE_EXTENDED; + tw_initconnect->fw_srl = current_fw_srl; + tw_initconnect->fw_arch_id = current_fw_arch_id; + tw_initconnect->fw_branch = current_fw_branch; + tw_initconnect->fw_build = current_fw_build; + } else + tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE; + + /* Send command packet to the board */ + twa_post_command_packet(tw_dev, request_id, 1); + + /* Poll for completion */ + if (twa_poll_response(tw_dev, request_id, 30)) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x15, "No valid response during init connection"); + } else { + if (set_features & TW_EXTENDED_INIT_CONNECT) { + *fw_on_ctlr_srl = tw_initconnect->fw_srl; + *fw_on_ctlr_arch_id = tw_initconnect->fw_arch_id; + *fw_on_ctlr_branch = tw_initconnect->fw_branch; + *fw_on_ctlr_build = tw_initconnect->fw_build; + *init_connect_result = tw_initconnect->result; + } + retval = 0; + } + + tw_dev->posted_request_count--; + tw_dev->state[request_id] = TW_S_INITIAL; + + return retval; +} /* End twa_initconnection() */ + +/* This function will initialize the fields of a device extension */ +static int twa_initialize_device_extension(TW_Device_Extension *tw_dev) +{ + int i, retval = 1; + + /* Initialize command packet buffers */ + if (twa_allocate_memory(tw_dev, sizeof(TW_Command_Full), 0)) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x16, "Command packet memory allocation failed"); + goto out; + } + + /* Initialize generic buffer */ + if (twa_allocate_memory(tw_dev, TW_SECTOR_SIZE, 1)) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x17, "Generic memory allocation failed"); + goto out; + } + + /* Allocate event info space */ + tw_dev->event_queue[0] = kmalloc(sizeof(TW_Event) * TW_Q_LENGTH, GFP_KERNEL); + if (!tw_dev->event_queue[0]) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x18, "Event info memory allocation failed"); + goto out; + } + + memset(tw_dev->event_queue[0], 0, sizeof(TW_Event) * TW_Q_LENGTH); + + for (i = 0; i < TW_Q_LENGTH; i++) { + tw_dev->event_queue[i] = (TW_Event *)((unsigned char *)tw_dev->event_queue[0] + (i * sizeof(TW_Event))); + 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->free_head = TW_Q_START; + tw_dev->free_tail = TW_Q_START; + tw_dev->error_sequence_id = 1; + tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; + + init_MUTEX(&tw_dev->ioctl_sem); + init_waitqueue_head(&tw_dev->ioctl_wqueue); + + retval = 0; +out: + return retval; +} /* End twa_initialize_device_extension() */ + +/* This function is the interrupt service routine */ +static irqreturn_t twa_interrupt(int irq, void *dev_instance, struct pt_regs *regs) +{ + int request_id, error = 0; + u32 status_reg_value; + TW_Response_Queue response_que; + TW_Command_Full *full_command_packet; + TW_Command *command_packet; + TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance; + int handled = 0; + + /* Get the per adapter lock */ + spin_lock(tw_dev->host->host_lock); + + /* Read the registers */ + status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev)); + + /* Check if this is our interrupt, otherwise bail */ + if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT)) + goto twa_interrupt_bail; + + handled = 1; + + /* Check controller for errors */ + if (twa_check_bits(status_reg_value)) { + if (twa_decode_bits(tw_dev, status_reg_value)) { + TW_CLEAR_ALL_INTERRUPTS(tw_dev); + goto twa_interrupt_bail; + } + } + + /* Handle host interrupt */ + if (status_reg_value & TW_STATUS_HOST_INTERRUPT) + TW_CLEAR_HOST_INTERRUPT(tw_dev); + + /* Handle attention interrupt */ + if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) { + TW_CLEAR_ATTENTION_INTERRUPT(tw_dev); + if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) { + twa_get_request_id(tw_dev, &request_id); + + error = twa_aen_read_queue(tw_dev, request_id); + if (error) { + tw_dev->state[request_id] = TW_S_COMPLETED; + twa_free_request_id(tw_dev, request_id); + clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags); + } + } + } + + /* Handle command interrupt */ + if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) { + TW_MASK_COMMAND_INTERRUPT(tw_dev); + /* 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) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x19, "Found request id that wasn't pending"); + TW_CLEAR_ALL_INTERRUPTS(tw_dev); + goto twa_interrupt_bail; + } + if (twa_post_command_packet(tw_dev, request_id, 1)==0) { + tw_dev->pending_head = (tw_dev->pending_head + 1) % TW_Q_LENGTH; + tw_dev->pending_request_count--; + } else { + /* If we get here, we will continue re-posting on the next command interrupt */ + break; + } + } + } + + /* 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) { + /* Complete the response */ + response_que.value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev)); + request_id = TW_RESID_OUT(response_que.response_id); + full_command_packet = tw_dev->command_packet_virt[request_id]; + error = 0; + command_packet = &full_command_packet->command.oldcommand; + /* Check for command packet errors */ + if (full_command_packet->command.newcommand.status != 0) { + if (tw_dev->srb[request_id] != 0) { + error = twa_fill_sense(tw_dev, request_id, 1, 1); + } else { + /* Skip ioctl error prints */ + if (request_id != tw_dev->chrdev_request_id) { + error = twa_fill_sense(tw_dev, request_id, 0, 1); + } + } + } + + /* Check for correct state */ + if (tw_dev->state[request_id] != TW_S_POSTED) { + if (tw_dev->srb[request_id] != 0) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Received a request id that wasn't posted"); + TW_CLEAR_ALL_INTERRUPTS(tw_dev); + goto twa_interrupt_bail; + } + } + + /* Check for internal command completion */ + if (tw_dev->srb[request_id] == 0) { + if (request_id != tw_dev->chrdev_request_id) { + if (twa_aen_complete(tw_dev, request_id)) + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1b, "Error completing AEN during attention interrupt"); + } else { + tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; + wake_up(&tw_dev->ioctl_wqueue); + } + } else { + twa_scsiop_execute_scsi_complete(tw_dev, request_id); + /* 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); + } + + /* Report residual bytes for single sgl */ + if ((tw_dev->srb[request_id]->use_sg <= 1) && (full_command_packet->command.newcommand.status == 0)) { + if (full_command_packet->command.newcommand.sg_list[0].length < tw_dev->srb[request_id]->request_bufflen) + tw_dev->srb[request_id]->resid = tw_dev->srb[request_id]->request_bufflen - full_command_packet->command.newcommand.sg_list[0].length; + } + + /* Now complete the io */ + tw_dev->state[request_id] = TW_S_COMPLETED; + twa_free_request_id(tw_dev, request_id); + tw_dev->posted_request_count--; + tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]); + twa_unmap_scsi_data(tw_dev, request_id); + } + + /* Check for valid status after each drain */ + status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev)); + if (twa_check_bits(status_reg_value)) { + if (twa_decode_bits(tw_dev, status_reg_value)) { + TW_CLEAR_ALL_INTERRUPTS(tw_dev); + goto twa_interrupt_bail; + } + } + } + } + +twa_interrupt_bail: + spin_unlock(tw_dev->host->host_lock); + return IRQ_RETVAL(handled); +} /* End twa_interrupt() */ + +/* This function will load the request id and various sgls for ioctls */ +static void twa_load_sgl(TW_Command_Full *full_command_packet, int request_id, dma_addr_t dma_handle, int length) +{ + TW_Command *oldcommand; + TW_Command_Apache *newcommand; + TW_SG_Entry *sgl; + + if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) { + newcommand = &full_command_packet->command.newcommand; + newcommand->request_id__lunl = + TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl), request_id); + newcommand->sg_list[0].address = dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1; + newcommand->sg_list[0].length = length; + newcommand->sgl_entries__lunh = + TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), 1); + } else { + oldcommand = &full_command_packet->command.oldcommand; + oldcommand->request_id = request_id; + + if (TW_SGL_OUT(oldcommand->opcode__sgloffset)) { + /* Load the sg list */ + sgl = (TW_SG_Entry *)((u32 *)oldcommand+TW_SGL_OUT(oldcommand->opcode__sgloffset)); + sgl->address = dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1; + sgl->length = length; + + if ((sizeof(long) < 8) && (sizeof(dma_addr_t) > 4)) + oldcommand->size += 1; + } + } +} /* End twa_load_sgl() */ + +/* This function will perform a pci-dma mapping for a scatter gather list */ +static int twa_map_scsi_sg_data(TW_Device_Extension *tw_dev, int request_id) +{ + int use_sg; + struct scsi_cmnd *cmd = tw_dev->srb[request_id]; + struct pci_dev *pdev = tw_dev->tw_pci_dev; + int retval = 0; + + if (cmd->use_sg == 0) + goto out; + + use_sg = pci_map_sg(pdev, cmd->buffer, cmd->use_sg, DMA_BIDIRECTIONAL); + + if (use_sg == 0) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1c, "Failed to map scatter gather list"); + goto out; + } + + cmd->SCp.phase = TW_PHASE_SGLIST; + cmd->SCp.have_data_in = use_sg; + retval = use_sg; +out: + return retval; +} /* End twa_map_scsi_sg_data() */ + +/* This function will perform a pci-dma map for a single buffer */ +static dma_addr_t twa_map_scsi_single_data(TW_Device_Extension *tw_dev, int request_id) +{ + dma_addr_t mapping; + struct scsi_cmnd *cmd = tw_dev->srb[request_id]; + struct pci_dev *pdev = tw_dev->tw_pci_dev; + int retval = 0; + + if (cmd->request_bufflen == 0) { + retval = 0; + goto out; + } + + mapping = pci_map_single(pdev, cmd->request_buffer, cmd->request_bufflen, DMA_BIDIRECTIONAL); + + if (mapping == 0) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1d, "Failed to map page"); + goto out; + } + + cmd->SCp.phase = TW_PHASE_SINGLE; + cmd->SCp.have_data_in = mapping; + retval = mapping; +out: + return retval; +} /* End twa_map_scsi_single_data() */ + +/* This function will poll for a response interrupt of a request */ +static int twa_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds) +{ + int retval = 1, found = 0, response_request_id; + TW_Response_Queue response_queue; + TW_Command_Full *full_command_packet = tw_dev->command_packet_virt[request_id]; + + if (twa_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, seconds) == 0) { + response_queue.value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev)); + response_request_id = TW_RESID_OUT(response_queue.response_id); + if (request_id != response_request_id) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1e, "Found unexpected request id while polling for response"); + goto out; + } + if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) { + if (full_command_packet->command.newcommand.status != 0) { + /* bad response */ + twa_fill_sense(tw_dev, request_id, 0, 0); + goto out; + } + found = 1; + } else { + if (full_command_packet->command.oldcommand.status != 0) { + /* bad response */ + twa_fill_sense(tw_dev, request_id, 0, 0); + goto out; + } + found = 1; + } + } + + if (found) + retval = 0; +out: + return retval; +} /* End twa_poll_response() */ + +/* This function will poll the status register for a flag */ +static int twa_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds) +{ + u32 status_reg_value; + unsigned long before; + int retval = 1; + + status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev)); + before = jiffies; + + if (twa_check_bits(status_reg_value)) + twa_decode_bits(tw_dev, status_reg_value); + + while ((status_reg_value & flag) != flag) { + status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev)); + + if (twa_check_bits(status_reg_value)) + twa_decode_bits(tw_dev, status_reg_value); + + if (time_after(jiffies, before + HZ * seconds)) + goto out; + + msleep(50); + } + retval = 0; +out: + return retval; +} /* End twa_poll_status() */ + +/* This function will poll the status register for disappearance of a flag */ +static int twa_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 = readl(TW_STATUS_REG_ADDR(tw_dev)); + before = jiffies; + + if (twa_check_bits(status_reg_value)) + twa_decode_bits(tw_dev, status_reg_value); + + while ((status_reg_value & flag) != 0) { + status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev)); + if (twa_check_bits(status_reg_value)) + twa_decode_bits(tw_dev, status_reg_value); + + if (time_after(jiffies, before + HZ * seconds)) + goto out; + + msleep(50); + } + retval = 0; +out: + return retval; +} /* End twa_poll_status_gone() */ + +/* This function will attempt to post a command packet to the board */ +static int twa_post_command_packet(TW_Device_Extension *tw_dev, int request_id, char internal) +{ + u32 status_reg_value; + dma_addr_t command_que_value; + int retval = 1; + + command_que_value = tw_dev->command_packet_phys[request_id]; + status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev)); + + if (twa_check_bits(status_reg_value)) + twa_decode_bits(tw_dev, status_reg_value); + + if (((tw_dev->pending_request_count > 0) && (tw_dev->state[request_id] != TW_S_PENDING)) || (status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL)) { + + /* Only pend internal driver commands */ + if (!internal) { + retval = SCSI_MLQUEUE_HOST_BUSY; + goto out; + } + + /* Couldn't post the command packet, so we do it later */ + 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; + tw_dev->pending_tail = (tw_dev->pending_tail + 1) % TW_Q_LENGTH; + } + TW_UNMASK_COMMAND_INTERRUPT(tw_dev); + goto out; + } else { + /* We successfully posted the command packet */ + if (sizeof(dma_addr_t) > 4) { + command_que_value += TW_COMMAND_OFFSET; + writel((u32)command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev)); + writel((u32)((u64)command_que_value >> 32), TW_COMMAND_QUEUE_REG_ADDR(tw_dev) + 0x4); + } else { + writel(TW_COMMAND_OFFSET + 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; + } + } + retval = 0; +out: + return retval; +} /* End twa_post_command_packet() */ + +/* This function will reset a device extension */ +static int twa_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset) +{ + int i = 0; + int retval = 1; + unsigned long flags = 0; + + 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)) { + if (tw_dev->srb[i]) { + tw_dev->srb[i]->result = (DID_RESET << 16); + tw_dev->srb[i]->scsi_done(tw_dev->srb[i]); + twa_unmap_scsi_data(tw_dev, i); + } + } + } + + /* 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 (twa_reset_sequence(tw_dev, 1)) + goto out; + + TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev); + + /* Wake up any ioctl that was pending before the reset */ + if ((tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE) || (ioctl_reset)) { + clear_bit(TW_IN_RESET, &tw_dev->flags); + } else { + tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE; + wake_up(&tw_dev->ioctl_wqueue); + } + retval = 0; +out: + return retval; +} /* End twa_reset_device_extension() */ + +/* This function will reset a controller */ +static int twa_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset) +{ + int tries = 0, retval = 1, flashed = 0, do_soft_reset = soft_reset; + + while (tries < TW_MAX_RESET_TRIES) { + if (do_soft_reset) + TW_SOFT_RESET(tw_dev); + + /* Make sure controller is in a good state */ + if (twa_poll_status(tw_dev, TW_STATUS_MICROCONTROLLER_READY | (do_soft_reset == 1 ? TW_STATUS_ATTENTION_INTERRUPT : 0), 60)) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Microcontroller not ready during reset sequence"); + do_soft_reset = 1; + tries++; + continue; + } + + /* Empty response queue */ + if (twa_empty_response_queue(tw_dev)) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x20, "Response queue empty failed during reset sequence"); + do_soft_reset = 1; + tries++; + continue; + } + + flashed = 0; + + /* Check for compatibility/flash */ + if (twa_check_srl(tw_dev, &flashed)) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x21, "Compatibility check failed during reset sequence"); + do_soft_reset = 1; + tries++; + continue; + } else { + if (flashed) { + tries++; + continue; + } + } + + /* Drain the AEN queue */ + if (twa_aen_drain_queue(tw_dev, soft_reset)) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x22, "AEN drain failed during reset sequence"); + do_soft_reset = 1; + tries++; + continue; + } + + /* If we got here, controller is in a good state */ + retval = 0; + goto out; + } +out: + return retval; +} /* End twa_reset_sequence() */ + +/* This funciton returns unit geometry in cylinders/heads/sectors */ +static int twa_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[]) +{ + int heads, sectors, cylinders; + TW_Device_Extension *tw_dev; + + tw_dev = (TW_Device_Extension *)sdev->host->hostdata; + + if (capacity >= 0x200000) { + heads = 255; + sectors = 63; + cylinders = sector_div(capacity, heads * sectors); + } else { + heads = 64; + sectors = 32; + cylinders = sector_div(capacity, heads * sectors); + } + + geom[0] = heads; + geom[1] = sectors; + geom[2] = cylinders; + + return 0; +} /* End twa_scsi_biosparam() */ + +/* This is the new scsi eh reset function */ +static int twa_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; + + spin_unlock_irq(tw_dev->host->host_lock); + + tw_dev->num_resets++; + + printk(KERN_WARNING "3w-9xxx: scsi%d: WARNING: (0x%02X:0x%04X): Unit #%d: Command (0x%x) timed out, resetting card.\n", tw_dev->host->host_no, TW_DRIVER, 0x2c, SCpnt->device->id, SCpnt->cmnd[0]); + + /* Now reset the card and some of the device extension data */ + if (twa_reset_device_extension(tw_dev, 0)) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2b, "Controller reset failed during scsi host reset"); + goto out; + } + + retval = SUCCESS; +out: + spin_lock_irq(tw_dev->host->host_lock); + return retval; +} /* End twa_scsi_eh_reset() */ + +/* This is the main scsi queue function to handle scsi opcodes */ +static int twa_scsi_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *)) +{ + int request_id, retval; + TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata; + + /* Check if this FW supports luns */ + if ((SCpnt->device->lun != 0) && (tw_dev->working_srl < TW_FW_SRL_LUNS_SUPPORTED)) { + SCpnt->result = (DID_BAD_TARGET << 16); + done(SCpnt); + retval = 0; + goto out; + } + + /* Save done function into scsi_cmnd struct */ + SCpnt->scsi_done = done; + + /* Get a free request id */ + twa_get_request_id(tw_dev, &request_id); + + /* Save the scsi command for use by the ISR */ + tw_dev->srb[request_id] = SCpnt; + + /* Initialize phase to zero */ + SCpnt->SCp.phase = TW_PHASE_INITIAL; + + retval = twa_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL); + switch (retval) { + case SCSI_MLQUEUE_HOST_BUSY: + twa_free_request_id(tw_dev, request_id); + break; + case 1: + tw_dev->state[request_id] = TW_S_COMPLETED; + twa_free_request_id(tw_dev, request_id); + SCpnt->result = (DID_ERROR << 16); + done(SCpnt); + retval = 0; + } +out: + return retval; +} /* End twa_scsi_queue() */ + +/* This function hands scsi cdb's to the firmware */ +static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry *sglistarg) +{ + TW_Command_Full *full_command_packet; + TW_Command_Apache *command_packet; + u32 num_sectors = 0x0; + int i, sg_count; + struct scsi_cmnd *srb = NULL; + struct scatterlist *sglist = NULL; + u32 buffaddr = 0x0; + int retval = 1; + + if (tw_dev->srb[request_id]) { + if (tw_dev->srb[request_id]->request_buffer) { + sglist = (struct scatterlist *)tw_dev->srb[request_id]->request_buffer; + } + srb = tw_dev->srb[request_id]; + } + + /* Initialize command packet */ + full_command_packet = tw_dev->command_packet_virt[request_id]; + full_command_packet->header.header_desc.size_header = 128; + full_command_packet->header.status_block.error = 0; + full_command_packet->header.status_block.severity__reserved = 0; + + command_packet = &full_command_packet->command.newcommand; + command_packet->status = 0; + command_packet->opcode__reserved = TW_OPRES_IN(0, TW_OP_EXECUTE_SCSI); + + /* We forced 16 byte cdb use earlier */ + if (!cdb) + memcpy(command_packet->cdb, srb->cmnd, TW_MAX_CDB_LEN); + else + memcpy(command_packet->cdb, cdb, TW_MAX_CDB_LEN); + + if (srb) { + command_packet->unit = srb->device->id; + command_packet->request_id__lunl = + TW_REQ_LUN_IN(srb->device->lun, request_id); + } else { + command_packet->request_id__lunl = + TW_REQ_LUN_IN(0, request_id); + command_packet->unit = 0; + } + + command_packet->sgl_offset = 16; + + if (!sglistarg) { + /* Map sglist from scsi layer to cmd packet */ + if (tw_dev->srb[request_id]->use_sg == 0) { + if (tw_dev->srb[request_id]->request_bufflen < TW_MIN_SGL_LENGTH) { + command_packet->sg_list[0].address = tw_dev->generic_buffer_phys[request_id]; + command_packet->sg_list[0].length = TW_MIN_SGL_LENGTH; + } else { + buffaddr = twa_map_scsi_single_data(tw_dev, request_id); + if (buffaddr == 0) + goto out; + + command_packet->sg_list[0].address = buffaddr; + command_packet->sg_list[0].length = tw_dev->srb[request_id]->request_bufflen; + } + command_packet->sgl_entries__lunh = TW_REQ_LUN_IN((srb->device->lun >> 4), 1); + + if (command_packet->sg_list[0].address & TW_ALIGNMENT_9000_SGL) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2d, "Found unaligned address during execute scsi"); + goto out; + } + } + + if (tw_dev->srb[request_id]->use_sg > 0) { + if ((tw_dev->srb[request_id]->use_sg == 1) && (tw_dev->srb[request_id]->request_bufflen < TW_MIN_SGL_LENGTH)) { + command_packet->sg_list[0].address = tw_dev->generic_buffer_phys[request_id]; + command_packet->sg_list[0].length = TW_MIN_SGL_LENGTH; + } else { + sg_count = twa_map_scsi_sg_data(tw_dev, request_id); + if (sg_count == 0) + goto out; + + for (i = 0; i < sg_count; i++) { + command_packet->sg_list[i].address = sg_dma_address(&sglist[i]); + command_packet->sg_list[i].length = sg_dma_len(&sglist[i]); + if (command_packet->sg_list[i].address & TW_ALIGNMENT_9000_SGL) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2e, "Found unaligned sgl address during execute scsi"); + goto out; + } + } + } + command_packet->sgl_entries__lunh = TW_REQ_LUN_IN((srb->device->lun >> 4), tw_dev->srb[request_id]->use_sg); + } + } else { + /* Internal cdb post */ + for (i = 0; i < use_sg; i++) { + command_packet->sg_list[i].address = sglistarg[i].address; + command_packet->sg_list[i].length = sglistarg[i].length; + if (command_packet->sg_list[i].address & TW_ALIGNMENT_9000_SGL) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2f, "Found unaligned sgl address during internal post"); + goto out; + } + } + command_packet->sgl_entries__lunh = TW_REQ_LUN_IN(0, use_sg); + } + + if (srb) { + if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6) + num_sectors = (u32)srb->cmnd[4]; + + if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10) + 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; + + /* Update SG statistics */ + if (srb) { + tw_dev->sgl_entries = tw_dev->srb[request_id]->use_sg; + if (tw_dev->sgl_entries > tw_dev->max_sgl_entries) + tw_dev->max_sgl_entries = tw_dev->sgl_entries; + } + + /* Now post the command to the board */ + if (srb) { + retval = twa_post_command_packet(tw_dev, request_id, 0); + } else { + twa_post_command_packet(tw_dev, request_id, 1); + retval = 0; + } +out: + return retval; +} /* End twa_scsiop_execute_scsi() */ + +/* This function completes an execute scsi operation */ +static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int request_id) +{ + /* Copy the response if too small */ + if ((tw_dev->srb[request_id]->request_buffer) && (tw_dev->srb[request_id]->request_bufflen < TW_MIN_SGL_LENGTH)) { + memcpy(tw_dev->srb[request_id]->request_buffer, + tw_dev->generic_buffer_virt[request_id], + tw_dev->srb[request_id]->request_bufflen); + } +} /* End twa_scsiop_execute_scsi_complete() */ + +/* This function tells the controller to shut down */ +static void __twa_shutdown(TW_Device_Extension *tw_dev) +{ + /* Disable interrupts */ + TW_DISABLE_INTERRUPTS(tw_dev); + + printk(KERN_WARNING "3w-9xxx: Shutting down host %d.\n", tw_dev->host->host_no); + + /* Tell the card we are shutting down */ + if (twa_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x31, "Connection shutdown failed"); + } else { + printk(KERN_WARNING "3w-9xxx: Shutdown complete.\n"); + } + + /* Clear all interrupts just before exit */ + TW_CLEAR_ALL_INTERRUPTS(tw_dev); +} /* End __twa_shutdown() */ + +/* Wrapper for __twa_shutdown */ +static void twa_shutdown(struct device *dev) +{ + struct Scsi_Host *host = pci_get_drvdata(to_pci_dev(dev)); + TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; + + __twa_shutdown(tw_dev); +} /* End twa_shutdown() */ + +/* This function will look up a string */ +static char *twa_string_lookup(twa_message_type *table, unsigned int code) +{ + int index; + + for (index = 0; ((code != table[index].code) && + (table[index].text != (char *)0)); index++); + return(table[index].text); +} /* End twa_string_lookup() */ + +/* This function will perform a pci-dma unmap */ +static void twa_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id) +{ + struct scsi_cmnd *cmd = tw_dev->srb[request_id]; + struct pci_dev *pdev = tw_dev->tw_pci_dev; + + switch(cmd->SCp.phase) { + case TW_PHASE_SINGLE: + pci_unmap_single(pdev, cmd->SCp.have_data_in, cmd->request_bufflen, DMA_BIDIRECTIONAL); + break; + case TW_PHASE_SGLIST: + pci_unmap_sg(pdev, cmd->request_buffer, cmd->use_sg, DMA_BIDIRECTIONAL); + break; + } +} /* End twa_unmap_scsi_data() */ + +/* scsi_host_template initializer */ +static struct scsi_host_template driver_template = { + .module = THIS_MODULE, + .name = "3ware 9000 Storage Controller", + .queuecommand = twa_scsi_queue, + .eh_host_reset_handler = twa_scsi_eh_reset, + .bios_param = twa_scsi_biosparam, + .change_queue_depth = twa_change_queue_depth, + .can_queue = TW_Q_LENGTH-2, + .this_id = -1, + .sg_tablesize = TW_APACHE_MAX_SGL_LENGTH, + .max_sectors = TW_MAX_SECTORS, + .cmd_per_lun = TW_MAX_CMDS_PER_LUN, + .use_clustering = ENABLE_CLUSTERING, + .shost_attrs = twa_host_attrs, + .emulated = 1 +}; + +/* This function will probe and initialize a card */ +static int __devinit twa_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id) +{ + struct Scsi_Host *host = NULL; + TW_Device_Extension *tw_dev; + u32 mem_addr; + int retval = -ENODEV; + + retval = pci_enable_device(pdev); + if (retval) { + TW_PRINTK(host, TW_DRIVER, 0x34, "Failed to enable pci device"); + goto out_disable_device; + } + + pci_set_master(pdev); + + retval = pci_set_dma_mask(pdev, sizeof(dma_addr_t) > 4 ? DMA_64BIT_MASK : DMA_32BIT_MASK); + if (retval) { + TW_PRINTK(host, TW_DRIVER, 0x23, "Failed to set dma mask"); + goto out_disable_device; + } + + host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension)); + if (!host) { + TW_PRINTK(host, TW_DRIVER, 0x24, "Failed to allocate memory for device extension"); + retval = -ENOMEM; + goto out_disable_device; + } + tw_dev = (TW_Device_Extension *)host->hostdata; + + memset(tw_dev, 0, sizeof(TW_Device_Extension)); + + /* Save values to device extension */ + tw_dev->host = host; + tw_dev->tw_pci_dev = pdev; + + if (twa_initialize_device_extension(tw_dev)) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x25, "Failed to initialize device extension"); + goto out_free_device_extension; + } + + /* Request IO regions */ + retval = pci_request_regions(pdev, "3w-9xxx"); + if (retval) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x26, "Failed to get mem region"); + goto out_free_device_extension; + } + + mem_addr = pci_resource_start(pdev, 1); + + /* Save base address */ + tw_dev->base_addr = ioremap(mem_addr, PAGE_SIZE); + if (!tw_dev->base_addr) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x35, "Failed to ioremap"); + goto out_release_mem_region; + } + + /* Disable interrupts on the card */ + TW_DISABLE_INTERRUPTS(tw_dev); + + /* Initialize the card */ + if (twa_reset_sequence(tw_dev, 0)) + goto out_release_mem_region; + + /* Set host specific parameters */ + host->max_id = TW_MAX_UNITS; + host->max_cmd_len = TW_MAX_CDB_LEN; + + /* Channels aren't supported by adapter */ + host->max_lun = TW_MAX_LUNS(tw_dev->working_srl); + host->max_channel = 0; + + /* Register the card with the kernel SCSI layer */ + retval = scsi_add_host(host, &pdev->dev); + if (retval) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x27, "scsi add host failed"); + goto out_release_mem_region; + } + + pci_set_drvdata(pdev, host); + + printk(KERN_WARNING "3w-9xxx: scsi%d: Found a 3ware 9000 Storage Controller at 0x%x, IRQ: %d.\n", + host->host_no, mem_addr, pdev->irq); + printk(KERN_WARNING "3w-9xxx: scsi%d: Firmware %s, BIOS %s, Ports: %d.\n", + host->host_no, + (char *)twa_get_param(tw_dev, 0, TW_VERSION_TABLE, + TW_PARAM_FWVER, TW_PARAM_FWVER_LENGTH), + (char *)twa_get_param(tw_dev, 1, TW_VERSION_TABLE, + TW_PARAM_BIOSVER, TW_PARAM_BIOSVER_LENGTH), + *(int *)twa_get_param(tw_dev, 2, TW_INFORMATION_TABLE, + TW_PARAM_PORTCOUNT, TW_PARAM_PORTCOUNT_LENGTH)); + + /* Now setup the interrupt handler */ + retval = request_irq(pdev->irq, twa_interrupt, SA_SHIRQ, "3w-9xxx", tw_dev); + if (retval) { + TW_PRINTK(tw_dev->host, TW_DRIVER, 0x30, "Error requesting IRQ"); + goto out_remove_host; + } + + twa_device_extension_list[twa_device_extension_count] = tw_dev; + twa_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 (twa_major == -1) { + if ((twa_major = register_chrdev (0, "twa", &twa_fops)) < 0) + TW_PRINTK(host, TW_DRIVER, 0x29, "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: + twa_free_device_extension(tw_dev); + scsi_host_put(host); +out_disable_device: + pci_disable_device(pdev); + + return retval; +} /* End twa_probe() */ + +/* This function is called to remove a device */ +static void twa_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 (twa_major >= 0) { + unregister_chrdev(twa_major, "twa"); + twa_major = -1; + } + + /* Free up the IRQ */ + free_irq(tw_dev->tw_pci_dev->irq, tw_dev); + + /* Shutdown the card */ + __twa_shutdown(tw_dev); + + /* Free up the mem region */ + pci_release_regions(pdev); + + /* Free up device extension resources */ + twa_free_device_extension(tw_dev); + + scsi_host_put(tw_dev->host); + pci_disable_device(pdev); + twa_device_extension_count--; +} /* End twa_remove() */ + +/* PCI Devices supported by this driver */ +static struct pci_device_id twa_pci_tbl[] __devinitdata = { + { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9000, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, + { } +}; +MODULE_DEVICE_TABLE(pci, twa_pci_tbl); + +/* pci_driver initializer */ +static struct pci_driver twa_driver = { + .name = "3w-9xxx", + .id_table = twa_pci_tbl, + .probe = twa_probe, + .remove = twa_remove, + .driver = { + .shutdown = twa_shutdown + } +}; + +/* This function is called on driver initialization */ +static int __init twa_init(void) +{ + printk(KERN_WARNING "3ware 9000 Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION); + + return pci_module_init(&twa_driver); +} /* End twa_init() */ + +/* This function is called on driver exit */ +static void __exit twa_exit(void) +{ + pci_unregister_driver(&twa_driver); +} /* End twa_exit() */ + +module_init(twa_init); +module_exit(twa_exit); + |