static int rd_configure_device(struct se_device *dev)
{
struct rd_dev *rd_dev = RD_DEV(dev);
struct rd_host *rd_host = dev->se_hba->hba_ptr;
int ret;
if (!(rd_dev->rd_flags & RDF_HAS_PAGE_COUNT)) {
pr_debug("Missing rd_pages= parameter\n");
return -EINVAL;
}
ret = rd_build_device_space(rd_dev);
if (ret < 0)
goto fail;
dev->dev_attrib.hw_block_size = RD_BLOCKSIZE;
dev->dev_attrib.hw_max_sectors = UINT_MAX;
dev->dev_attrib.hw_queue_depth = RD_MAX_DEVICE_QUEUE_DEPTH;
rd_dev->rd_dev_id = rd_host->rd_host_dev_id_count++;
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_dev_id, rd_dev->rd_page_count,
rd_dev->sg_table_count,
(unsigned long)(rd_dev->rd_page_count * PAGE_SIZE));
return 0;
fail:
rd_release_device_space(rd_dev);
return ret;
}
/* 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)
{
struct se_device *dev;
struct se_dev_limits dev_limits;
struct rd_dev *rd_dev = p;
struct rd_host *rd_host = hba->hba_ptr;
int dev_flags = 0, ret;
char prod[16], rev[4];
memset(&dev_limits, 0, sizeof(struct se_dev_limits));
ret = rd_build_device_space(rd_dev);
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);
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.hw_queue_depth = RD_MAX_DEVICE_QUEUE_DEPTH;
dev_limits.queue_depth = RD_DEVICE_QUEUE_DEPTH;
dev = transport_add_device_to_core_hba(hba,
&rd_mcp_template, se_dev, dev_flags, rd_dev,
&dev_limits, prod, rev);
if (!dev)
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"
" %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_dev->sg_table_count,
(unsigned long)(rd_dev->rd_page_count * PAGE_SIZE));
return dev;
fail:
rd_release_device_space(rd_dev);
return ERR_PTR(ret);
}