diff options
Diffstat (limited to 'drivers/target/target_core_rd.c')
-rw-r--r-- | drivers/target/target_core_rd.c | 168 |
1 files changed, 43 insertions, 125 deletions
diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c index 8b68f7b..d0ceb87 100644 --- a/drivers/target/target_core_rd.c +++ b/drivers/target/target_core_rd.c @@ -64,9 +64,6 @@ static int rd_attach_hba(struct se_hba *hba, u32 host_id) pr_debug("CORE_HBA[%d] - TCM Ramdisk HBA Driver %s on" " Generic Target Core Stack %s\n", hba->hba_id, RD_HBA_VERSION, TARGET_CORE_MOD_VERSION); - pr_debug("CORE_HBA[%d] - Attached Ramdisk HBA: %u to Generic" - " MaxSectors: %u\n", hba->hba_id, - rd_host->rd_host_id, RD_MAX_SECTORS); return 0; } @@ -199,10 +196,7 @@ static int rd_build_device_space(struct rd_dev *rd_dev) return 0; } -static void *rd_allocate_virtdevice( - struct se_hba *hba, - const char *name, - int rd_direct) +static void *rd_allocate_virtdevice(struct se_hba *hba, const char *name) { struct rd_dev *rd_dev; struct rd_host *rd_host = hba->hba_ptr; @@ -214,25 +208,12 @@ static void *rd_allocate_virtdevice( } rd_dev->rd_host = rd_host; - rd_dev->rd_direct = rd_direct; return rd_dev; } -static void *rd_MEMCPY_allocate_virtdevice(struct se_hba *hba, const char *name) -{ - return rd_allocate_virtdevice(hba, name, 0); -} - -/* rd_create_virtdevice(): - * - * - */ -static struct se_device *rd_create_virtdevice( - struct se_hba *hba, - struct se_subsystem_dev *se_dev, - void *p, - int rd_direct) +static struct se_device *rd_create_virtdevice(struct se_hba *hba, + struct se_subsystem_dev *se_dev, void *p) { struct se_device *dev; struct se_dev_limits dev_limits; @@ -247,13 +228,12 @@ static struct se_device *rd_create_virtdevice( if (ret < 0) goto fail; - snprintf(prod, 16, "RAMDISK-%s", (rd_dev->rd_direct) ? "DR" : "MCP"); - snprintf(rev, 4, "%s", (rd_dev->rd_direct) ? RD_DR_VERSION : - RD_MCP_VERSION); + snprintf(prod, 16, "RAMDISK-MCP"); + snprintf(rev, 4, "%s", RD_MCP_VERSION); dev_limits.limits.logical_block_size = RD_BLOCKSIZE; - dev_limits.limits.max_hw_sectors = RD_MAX_SECTORS; - dev_limits.limits.max_sectors = RD_MAX_SECTORS; + dev_limits.limits.max_hw_sectors = UINT_MAX; + dev_limits.limits.max_sectors = UINT_MAX; dev_limits.hw_queue_depth = RD_MAX_DEVICE_QUEUE_DEPTH; dev_limits.queue_depth = RD_DEVICE_QUEUE_DEPTH; @@ -264,12 +244,10 @@ static struct se_device *rd_create_virtdevice( goto fail; rd_dev->rd_dev_id = rd_host->rd_host_dev_id_count++; - rd_dev->rd_queue_depth = dev->queue_depth; - pr_debug("CORE_RD[%u] - Added TCM %s Ramdisk Device ID: %u of" + pr_debug("CORE_RD[%u] - Added TCM MEMCPY Ramdisk Device ID: %u of" " %u pages in %u tables, %lu total bytes\n", - rd_host->rd_host_id, (!rd_dev->rd_direct) ? "MEMCPY" : - "DIRECT", rd_dev->rd_dev_id, rd_dev->rd_page_count, + rd_host->rd_host_id, rd_dev->rd_dev_id, rd_dev->rd_page_count, rd_dev->sg_table_count, (unsigned long)(rd_dev->rd_page_count * PAGE_SIZE)); @@ -280,18 +258,6 @@ fail: return ERR_PTR(ret); } -static struct se_device *rd_MEMCPY_create_virtdevice( - struct se_hba *hba, - struct se_subsystem_dev *se_dev, - void *p) -{ - return rd_create_virtdevice(hba, se_dev, p, 0); -} - -/* rd_free_device(): (Part of se_subsystem_api_t template) - * - * - */ static void rd_free_device(void *p) { struct rd_dev *rd_dev = p; @@ -300,29 +266,6 @@ static void rd_free_device(void *p) kfree(rd_dev); } -static inline struct rd_request *RD_REQ(struct se_task *task) -{ - return container_of(task, struct rd_request, rd_task); -} - -static struct se_task * -rd_alloc_task(unsigned char *cdb) -{ - struct rd_request *rd_req; - - rd_req = kzalloc(sizeof(struct rd_request), GFP_KERNEL); - if (!rd_req) { - pr_err("Unable to allocate struct rd_request\n"); - return NULL; - } - - return &rd_req->rd_task; -} - -/* rd_get_sg_table(): - * - * - */ static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page) { u32 i; @@ -341,31 +284,41 @@ static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page) return NULL; } -static int rd_MEMCPY(struct rd_request *req, u32 read_rd) +static int rd_execute_cmd(struct se_cmd *cmd, struct scatterlist *sgl, + u32 sgl_nents, enum dma_data_direction data_direction) { - struct se_task *task = &req->rd_task; - struct rd_dev *dev = req->rd_task.task_se_cmd->se_dev->dev_ptr; + struct se_device *se_dev = cmd->se_dev; + struct rd_dev *dev = se_dev->dev_ptr; struct rd_dev_sg_table *table; struct scatterlist *rd_sg; struct sg_mapping_iter m; - u32 rd_offset = req->rd_offset; + u32 rd_offset; + u32 rd_size; + u32 rd_page; u32 src_len; + u64 tmp; + + tmp = cmd->t_task_lba * se_dev->se_sub_dev->se_dev_attrib.block_size; + rd_offset = do_div(tmp, PAGE_SIZE); + rd_page = tmp; + rd_size = cmd->data_length; - table = rd_get_sg_table(dev, req->rd_page); + table = rd_get_sg_table(dev, rd_page); if (!table) return -EINVAL; - rd_sg = &table->sg_table[req->rd_page - table->page_start_offset]; + rd_sg = &table->sg_table[rd_page - table->page_start_offset]; pr_debug("RD[%u]: %s LBA: %llu, Size: %u Page: %u, Offset: %u\n", - dev->rd_dev_id, read_rd ? "Read" : "Write", - task->task_lba, req->rd_size, req->rd_page, - rd_offset); + dev->rd_dev_id, + data_direction == DMA_FROM_DEVICE ? "Read" : "Write", + cmd->t_task_lba, rd_size, rd_page, rd_offset); src_len = PAGE_SIZE - rd_offset; - sg_miter_start(&m, task->task_sg, task->task_sg_nents, - read_rd ? SG_MITER_TO_SG : SG_MITER_FROM_SG); - while (req->rd_size) { + sg_miter_start(&m, sgl, sgl_nents, + data_direction == DMA_FROM_DEVICE ? + SG_MITER_TO_SG : SG_MITER_FROM_SG); + while (rd_size) { u32 len; void *rd_addr; @@ -375,13 +328,13 @@ static int rd_MEMCPY(struct rd_request *req, u32 read_rd) rd_addr = sg_virt(rd_sg) + rd_offset; - if (read_rd) + if (data_direction == DMA_FROM_DEVICE) memcpy(m.addr, rd_addr, len); else memcpy(rd_addr, m.addr, len); - req->rd_size -= len; - if (!req->rd_size) + rd_size -= len; + if (!rd_size) continue; src_len -= len; @@ -391,15 +344,15 @@ static int rd_MEMCPY(struct rd_request *req, u32 read_rd) } /* rd page completed, next one please */ - req->rd_page++; + rd_page++; rd_offset = 0; src_len = PAGE_SIZE; - if (req->rd_page <= table->page_end_offset) { + if (rd_page <= table->page_end_offset) { rd_sg++; continue; } - table = rd_get_sg_table(dev, req->rd_page); + table = rd_get_sg_table(dev, rd_page); if (!table) { sg_miter_stop(&m); return -EINVAL; @@ -409,43 +362,11 @@ static int rd_MEMCPY(struct rd_request *req, u32 read_rd) rd_sg = table->sg_table; } sg_miter_stop(&m); - return 0; -} -/* rd_MEMCPY_do_task(): (Part of se_subsystem_api_t template) - * - * - */ -static int rd_MEMCPY_do_task(struct se_task *task) -{ - struct se_device *dev = task->task_se_cmd->se_dev; - struct rd_request *req = RD_REQ(task); - u64 tmp; - int ret; - - tmp = task->task_lba * dev->se_sub_dev->se_dev_attrib.block_size; - req->rd_offset = do_div(tmp, PAGE_SIZE); - req->rd_page = tmp; - req->rd_size = task->task_size; - - ret = rd_MEMCPY(req, task->task_data_direction == DMA_FROM_DEVICE); - if (ret != 0) - return ret; - - task->task_scsi_status = GOOD; - transport_complete_task(task, 1); + target_complete_cmd(cmd, SAM_STAT_GOOD); return 0; } -/* rd_free_task(): (Part of se_subsystem_api_t template) - * - * - */ -static void rd_free_task(struct se_task *task) -{ - kfree(RD_REQ(task)); -} - enum { Opt_rd_pages, Opt_err }; @@ -512,9 +433,8 @@ static ssize_t rd_show_configfs_dev_params( char *b) { struct rd_dev *rd_dev = se_dev->se_dev_su_ptr; - ssize_t bl = sprintf(b, "TCM RamDisk ID: %u RamDisk Makeup: %s\n", - rd_dev->rd_dev_id, (rd_dev->rd_direct) ? - "rd_direct" : "rd_mcp"); + ssize_t bl = sprintf(b, "TCM RamDisk ID: %u RamDisk Makeup: rd_mcp\n", + rd_dev->rd_dev_id); bl += sprintf(b + bl, " PAGES/PAGE_SIZE: %u*%lu" " SG_table_count: %u\n", rd_dev->rd_page_count, PAGE_SIZE, rd_dev->sg_table_count); @@ -545,12 +465,10 @@ static struct se_subsystem_api rd_mcp_template = { .transport_type = TRANSPORT_PLUGIN_VHBA_VDEV, .attach_hba = rd_attach_hba, .detach_hba = rd_detach_hba, - .allocate_virtdevice = rd_MEMCPY_allocate_virtdevice, - .create_virtdevice = rd_MEMCPY_create_virtdevice, + .allocate_virtdevice = rd_allocate_virtdevice, + .create_virtdevice = rd_create_virtdevice, .free_device = rd_free_device, - .alloc_task = rd_alloc_task, - .do_task = rd_MEMCPY_do_task, - .free_task = rd_free_task, + .execute_cmd = rd_execute_cmd, .check_configfs_dev_params = rd_check_configfs_dev_params, .set_configfs_dev_params = rd_set_configfs_dev_params, .show_configfs_dev_params = rd_show_configfs_dev_params, |