X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=drivers%2Fieee1394%2Fsbp2.c;h=18d7eda388512d8abd3a841fe1727f257ed0d2f6;hb=816aa907b909177bdf6e6e6b0d00c5e5a6e2be8c;hp=b871116fa4d1eec2189acd1348572a6f40b6cd87;hpb=7afa1467761f06bd9649efd66a4a6b3ff9f29a1f;p=powerpc.git diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c index b871116fa4..18d7eda388 100644 --- a/drivers/ieee1394/sbp2.c +++ b/drivers/ieee1394/sbp2.c @@ -411,14 +411,12 @@ static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_i spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); for (i = 0; i < orbs; i++) { - command = (struct sbp2_command_info *) - kmalloc(sizeof(struct sbp2_command_info), GFP_ATOMIC); + command = kzalloc(sizeof(*command), GFP_ATOMIC); if (!command) { spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); return -ENOMEM; } - memset(command, '\0', sizeof(struct sbp2_command_info)); command->command_orb_dma = pci_map_single(hi->host->pdev, &command->command_orb, sizeof(struct sbp2_command_orb), @@ -714,12 +712,11 @@ static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud SBP2_DEBUG("sbp2_alloc_device"); - scsi_id = kmalloc(sizeof(*scsi_id), GFP_KERNEL); + scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL); if (!scsi_id) { SBP2_ERR("failed to create scsi_id"); goto failed_alloc; } - memset(scsi_id, 0, sizeof(*scsi_id)); scsi_id->ne = ud->ne; scsi_id->ud = ud; @@ -859,56 +856,8 @@ static int sbp2_start_device(struct scsi_id_instance_data *scsi_id) pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_orb), &scsi_id->login_orb_dma); - if (!scsi_id->login_orb) { -alloc_fail: - if (scsi_id->query_logins_response) { - pci_free_consistent(hi->host->pdev, - sizeof(struct sbp2_query_logins_response), - scsi_id->query_logins_response, - scsi_id->query_logins_response_dma); - SBP2_DMA_FREE("query logins response DMA"); - } - - if (scsi_id->query_logins_orb) { - pci_free_consistent(hi->host->pdev, - sizeof(struct sbp2_query_logins_orb), - scsi_id->query_logins_orb, - scsi_id->query_logins_orb_dma); - SBP2_DMA_FREE("query logins ORB DMA"); - } - - if (scsi_id->logout_orb) { - pci_free_consistent(hi->host->pdev, - sizeof(struct sbp2_logout_orb), - scsi_id->logout_orb, - scsi_id->logout_orb_dma); - SBP2_DMA_FREE("logout ORB DMA"); - } - - if (scsi_id->reconnect_orb) { - pci_free_consistent(hi->host->pdev, - sizeof(struct sbp2_reconnect_orb), - scsi_id->reconnect_orb, - scsi_id->reconnect_orb_dma); - SBP2_DMA_FREE("reconnect ORB DMA"); - } - - if (scsi_id->login_response) { - pci_free_consistent(hi->host->pdev, - sizeof(struct sbp2_login_response), - scsi_id->login_response, - scsi_id->login_response_dma); - SBP2_DMA_FREE("login FIFO DMA"); - } - - list_del(&scsi_id->scsi_list); - - kfree(scsi_id); - - SBP2_ERR("Could not allocate memory for scsi_id"); - - return -ENOMEM; - } + if (!scsi_id->login_orb) + goto alloc_fail; SBP2_DMA_ALLOC("consistent DMA region for login ORB"); SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id); @@ -963,10 +912,17 @@ alloc_fail: error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0); if (error) { SBP2_ERR("scsi_add_device failed"); + sbp2_logout_device(scsi_id); + sbp2_remove_device(scsi_id); return error; } return 0; + +alloc_fail: + SBP2_ERR("Could not allocate memory for scsi_id"); + sbp2_remove_device(scsi_id); + return -ENOMEM; } /* @@ -1708,26 +1664,184 @@ static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait) return 0; } +static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb, + struct sbp2scsi_host_info *hi, + struct sbp2_command_info *command, + unsigned int scsi_use_sg, + struct scatterlist *sgpnt, + u32 orb_direction, + enum dma_data_direction dma_dir) +{ + command->dma_dir = dma_dir; + orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); + orb->misc |= ORB_SET_DIRECTION(orb_direction); + + /* Special case if only one element (and less than 64KB in size) */ + if ((scsi_use_sg == 1) && + (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) { + + SBP2_DEBUG("Only one s/g element"); + command->dma_size = sgpnt[0].length; + command->dma_type = CMD_DMA_PAGE; + command->cmd_dma = pci_map_page(hi->host->pdev, + sgpnt[0].page, + sgpnt[0].offset, + command->dma_size, + command->dma_dir); + SBP2_DMA_ALLOC("single page scatter element"); + + orb->data_descriptor_lo = command->cmd_dma; + orb->misc |= ORB_SET_DATA_SIZE(command->dma_size); + + } else { + struct sbp2_unrestricted_page_table *sg_element = + &command->scatter_gather_element[0]; + u32 sg_count, sg_len; + dma_addr_t sg_addr; + int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, + dma_dir); + + SBP2_DMA_ALLOC("scatter list"); + + command->dma_size = scsi_use_sg; + command->sge_buffer = sgpnt; + + /* use page tables (s/g) */ + orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); + orb->data_descriptor_lo = command->sge_dma; + + /* + * Loop through and fill out our sbp-2 page tables + * (and split up anything too large) + */ + for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) { + sg_len = sg_dma_len(sgpnt); + sg_addr = sg_dma_address(sgpnt); + while (sg_len) { + sg_element[sg_count].segment_base_lo = sg_addr; + if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { + sg_element[sg_count].length_segment_base_hi = + PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); + sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; + sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; + } else { + sg_element[sg_count].length_segment_base_hi = + PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); + sg_len = 0; + } + sg_count++; + } + } + + /* Number of page table (s/g) elements */ + orb->misc |= ORB_SET_DATA_SIZE(sg_count); + + sbp2util_packet_dump(sg_element, + (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, + "sbp2 s/g list", command->sge_dma); + + /* Byte swap page tables if necessary */ + sbp2util_cpu_to_be32_buffer(sg_element, + (sizeof(struct sbp2_unrestricted_page_table)) * + sg_count); + } +} + +static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb, + struct sbp2scsi_host_info *hi, + struct sbp2_command_info *command, + struct scatterlist *sgpnt, + u32 orb_direction, + unsigned int scsi_request_bufflen, + void *scsi_request_buffer, + enum dma_data_direction dma_dir) +{ + command->dma_dir = dma_dir; + command->dma_size = scsi_request_bufflen; + command->dma_type = CMD_DMA_SINGLE; + command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer, + command->dma_size, command->dma_dir); + orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); + orb->misc |= ORB_SET_DIRECTION(orb_direction); + + SBP2_DMA_ALLOC("single bulk"); + + /* + * Handle case where we get a command w/o s/g enabled (but + * check for transfers larger than 64K) + */ + if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) { + + orb->data_descriptor_lo = command->cmd_dma; + orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen); + + } else { + struct sbp2_unrestricted_page_table *sg_element = + &command->scatter_gather_element[0]; + u32 sg_count, sg_len; + dma_addr_t sg_addr; + + /* + * Need to turn this into page tables, since the + * buffer is too large. + */ + orb->data_descriptor_lo = command->sge_dma; + + /* Use page tables (s/g) */ + orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); + + /* + * fill out our sbp-2 page tables (and split up + * the large buffer) + */ + sg_count = 0; + sg_len = scsi_request_bufflen; + sg_addr = command->cmd_dma; + while (sg_len) { + sg_element[sg_count].segment_base_lo = sg_addr; + if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { + sg_element[sg_count].length_segment_base_hi = + PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); + sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; + sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; + } else { + sg_element[sg_count].length_segment_base_hi = + PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); + sg_len = 0; + } + sg_count++; + } + + /* Number of page table (s/g) elements */ + orb->misc |= ORB_SET_DATA_SIZE(sg_count); + + sbp2util_packet_dump(sg_element, + (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, + "sbp2 s/g list", command->sge_dma); + + /* Byte swap page tables if necessary */ + sbp2util_cpu_to_be32_buffer(sg_element, + (sizeof(struct sbp2_unrestricted_page_table)) * + sg_count); + } +} + /* * This function is called to create the actual command orb and s/g list * out of the scsi command itself. */ -static int sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, - struct sbp2_command_info *command, - unchar *scsi_cmd, - unsigned int scsi_use_sg, - unsigned int scsi_request_bufflen, - void *scsi_request_buffer, - enum dma_data_direction dma_dir) +static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, + struct sbp2_command_info *command, + unchar *scsi_cmd, + unsigned int scsi_use_sg, + unsigned int scsi_request_bufflen, + void *scsi_request_buffer, + enum dma_data_direction dma_dir) { struct sbp2scsi_host_info *hi = scsi_id->hi; struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer; struct sbp2_command_orb *command_orb = &command->command_orb; - struct sbp2_unrestricted_page_table *scatter_gather_element = - &command->scatter_gather_element[0]; - u32 sg_count, sg_len, orb_direction; - dma_addr_t sg_addr; - int i; + u32 orb_direction; /* * Set-up our command ORB.. @@ -1743,220 +1857,40 @@ static int sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code); command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */ - /* - * Get the direction of the transfer. If the direction is unknown, then use our - * goofy table as a back-up. - */ - switch (dma_dir) { - case DMA_NONE: + if (dma_dir == DMA_NONE) orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; - break; - case DMA_TO_DEVICE: + else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; - break; - case DMA_FROM_DEVICE: + else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; - break; - case DMA_BIDIRECTIONAL: - default: - SBP2_ERR("SCSI data transfer direction not specified. " - "Update the SBP2 direction table in sbp2.h if " - "necessary for your application"); - __scsi_print_command(scsi_cmd); - orb_direction = sbp2scsi_direction_table[*scsi_cmd]; - break; + else { + SBP2_WARN("Falling back to DMA_NONE"); + orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; } - /* - * Set-up our pagetable stuff... unfortunately, this has become - * messier than I'd like. Need to clean this up a bit. ;-) - */ + /* Set-up our pagetable stuff */ if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { - SBP2_DEBUG("No data transfer"); - - /* - * Handle no data transfer - */ command_orb->data_descriptor_hi = 0x0; command_orb->data_descriptor_lo = 0x0; command_orb->misc |= ORB_SET_DIRECTION(1); - } else if (scsi_use_sg) { - SBP2_DEBUG("Use scatter/gather"); - - /* - * Special case if only one element (and less than 64KB in size) - */ - if ((scsi_use_sg == 1) && (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) { - - SBP2_DEBUG("Only one s/g element"); - command->dma_dir = dma_dir; - command->dma_size = sgpnt[0].length; - command->dma_type = CMD_DMA_PAGE; - command->cmd_dma = pci_map_page(hi->host->pdev, - sgpnt[0].page, - sgpnt[0].offset, - command->dma_size, - command->dma_dir); - SBP2_DMA_ALLOC("single page scatter element"); - - command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); - command_orb->data_descriptor_lo = command->cmd_dma; - command_orb->misc |= ORB_SET_DATA_SIZE(command->dma_size); - command_orb->misc |= ORB_SET_DIRECTION(orb_direction); - - } else { - int count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, dma_dir); - SBP2_DMA_ALLOC("scatter list"); - - command->dma_size = scsi_use_sg; - command->dma_dir = dma_dir; - command->sge_buffer = sgpnt; - - /* use page tables (s/g) */ - command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); - command_orb->misc |= ORB_SET_DIRECTION(orb_direction); - command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); - command_orb->data_descriptor_lo = command->sge_dma; - - /* - * Loop through and fill out our sbp-2 page tables - * (and split up anything too large) - */ - for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) { - sg_len = sg_dma_len(sgpnt); - sg_addr = sg_dma_address(sgpnt); - while (sg_len) { - scatter_gather_element[sg_count].segment_base_lo = sg_addr; - if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { - scatter_gather_element[sg_count].length_segment_base_hi = - PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); - sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; - sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; - } else { - scatter_gather_element[sg_count].length_segment_base_hi = - PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); - sg_len = 0; - } - sg_count++; - } - } - - /* Number of page table (s/g) elements */ - command_orb->misc |= ORB_SET_DATA_SIZE(sg_count); - - sbp2util_packet_dump(scatter_gather_element, - (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, - "sbp2 s/g list", command->sge_dma); - - /* - * Byte swap page tables if necessary - */ - sbp2util_cpu_to_be32_buffer(scatter_gather_element, - (sizeof(struct sbp2_unrestricted_page_table)) * - sg_count); - - } - + sbp2_prep_command_orb_sg(command_orb, hi, command, scsi_use_sg, + sgpnt, orb_direction, dma_dir); } else { - SBP2_DEBUG("No scatter/gather"); - - command->dma_dir = dma_dir; - command->dma_size = scsi_request_bufflen; - command->dma_type = CMD_DMA_SINGLE; - command->cmd_dma = - pci_map_single(hi->host->pdev, scsi_request_buffer, - command->dma_size, command->dma_dir); - SBP2_DMA_ALLOC("single bulk"); - - /* - * Handle case where we get a command w/o s/g enabled (but - * check for transfers larger than 64K) - */ - if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) { - - command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); - command_orb->data_descriptor_lo = command->cmd_dma; - command_orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen); - command_orb->misc |= ORB_SET_DIRECTION(orb_direction); - - /* - * Sanity, in case our direction table is not - * up-to-date - */ - if (!scsi_request_bufflen) { - command_orb->data_descriptor_hi = 0x0; - command_orb->data_descriptor_lo = 0x0; - command_orb->misc |= ORB_SET_DIRECTION(1); - } - - } else { - /* - * Need to turn this into page tables, since the - * buffer is too large. - */ - command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); - command_orb->data_descriptor_lo = command->sge_dma; - - /* Use page tables (s/g) */ - command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); - command_orb->misc |= ORB_SET_DIRECTION(orb_direction); - - /* - * fill out our sbp-2 page tables (and split up - * the large buffer) - */ - sg_count = 0; - sg_len = scsi_request_bufflen; - sg_addr = command->cmd_dma; - while (sg_len) { - scatter_gather_element[sg_count].segment_base_lo = sg_addr; - if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { - scatter_gather_element[sg_count].length_segment_base_hi = - PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); - sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; - sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; - } else { - scatter_gather_element[sg_count].length_segment_base_hi = - PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); - sg_len = 0; - } - sg_count++; - } - - /* Number of page table (s/g) elements */ - command_orb->misc |= ORB_SET_DATA_SIZE(sg_count); - - sbp2util_packet_dump(scatter_gather_element, - (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, - "sbp2 s/g list", command->sge_dma); - - /* - * Byte swap page tables if necessary - */ - sbp2util_cpu_to_be32_buffer(scatter_gather_element, - (sizeof(struct sbp2_unrestricted_page_table)) * - sg_count); - - } - + sbp2_prep_command_orb_no_sg(command_orb, hi, command, sgpnt, + orb_direction, scsi_request_bufflen, + scsi_request_buffer, dma_dir); } - /* - * Byte swap command ORB if necessary - */ + /* Byte swap command ORB if necessary */ sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb)); - /* - * Put our scsi command in the command ORB - */ + /* Put our scsi command in the command ORB */ memset(command_orb->cdb, 0, 12); memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); - - return 0; } /* @@ -2373,6 +2307,16 @@ static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, goto done; } + /* + * Bidirectional commands are not yet implemented, + * and unknown transfer direction not handled. + */ + if (SCpnt->sc_data_direction == DMA_BIDIRECTIONAL) { + SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); + result = DID_ERROR << 16; + goto done; + } + /* * Try and send our SCSI command */ @@ -2612,27 +2556,17 @@ static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) { struct scsi_id_instance_data *scsi_id = (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; - unsigned long flags; SBP2_ERR("reset requested"); - spin_lock_irqsave(SCpnt->device->host->host_lock, flags); - if (sbp2util_node_is_available(scsi_id)) { SBP2_ERR("Generating sbp2 fetch agent reset"); sbp2_agent_reset(scsi_id, 0); } - spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags); - return SUCCESS; } -static const char *sbp2scsi_info(struct Scsi_Host *host) -{ - return "SCSI emulation for IEEE-1394 SBP-2 Devices"; -} - static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -2669,12 +2603,9 @@ static struct scsi_host_template scsi_driver_template = { .module = THIS_MODULE, .name = "SBP-2 IEEE-1394", .proc_name = SBP2_DEVICE_NAME, - .info = sbp2scsi_info, .queuecommand = sbp2scsi_queuecommand, .eh_abort_handler = sbp2scsi_abort, .eh_device_reset_handler = sbp2scsi_reset, - .eh_bus_reset_handler = sbp2scsi_reset, - .eh_host_reset_handler = sbp2scsi_reset, .slave_alloc = sbp2scsi_slave_alloc, .slave_configure = sbp2scsi_slave_configure, .slave_destroy = sbp2scsi_slave_destroy,