diff options
Diffstat (limited to 'drivers/target/target_core_rd.h')
| -rw-r--r-- | drivers/target/target_core_rd.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/drivers/target/target_core_rd.h b/drivers/target/target_core_rd.h new file mode 100644 index 000000000..9ffda5c4b --- /dev/null +++ b/drivers/target/target_core_rd.h @@ -0,0 +1,57 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef TARGET_CORE_RD_H +#define TARGET_CORE_RD_H + +#include <linux/module.h> +#include <linux/types.h> +#include <target/target_core_base.h> + +#define RD_HBA_VERSION "v4.0" +#define RD_MCP_VERSION "4.0" + +/* Largest piece of memory kmalloc can allocate */ +#define RD_MAX_ALLOCATION_SIZE 65536 +#define RD_DEVICE_QUEUE_DEPTH 32 +#define RD_MAX_DEVICE_QUEUE_DEPTH 128 +#define RD_BLOCKSIZE 512 + +/* Used in target_core_init_configfs() for virtual LUN 0 access */ +int __init rd_module_init(void); +void rd_module_exit(void); + +struct rd_dev_sg_table { + u32 page_start_offset; + u32 page_end_offset; + u32 rd_sg_count; + struct scatterlist *sg_table; +} ____cacheline_aligned; + +#define RDF_HAS_PAGE_COUNT 0x01 +#define RDF_NULLIO 0x02 +#define RDF_DUMMY 0x04 + +struct rd_dev { + struct se_device dev; + u32 rd_flags; + /* Unique Ramdisk Device ID in Ramdisk HBA */ + u32 rd_dev_id; + /* Total page count for ramdisk device */ + u32 rd_page_count; + /* Number of SG tables in sg_table_array */ + u32 sg_table_count; + /* Number of SG tables in sg_prot_array */ + u32 sg_prot_count; + /* Array of rd_dev_sg_table_t containing scatterlists */ + struct rd_dev_sg_table *sg_table_array; + /* Array of rd_dev_sg_table containing protection scatterlists */ + struct rd_dev_sg_table *sg_prot_array; + /* Ramdisk HBA device is connected to */ + struct rd_host *rd_host; +} ____cacheline_aligned; + +struct rd_host { + u32 rd_host_dev_id_count; + u32 rd_host_id; /* Unique Ramdisk Host ID */ +} ____cacheline_aligned; + +#endif /* TARGET_CORE_RD_H */ |