mirror of
https://github.com/torvalds/linux.git
synced 2024-11-23 20:51:44 +00:00
b2aaee33fb
Changes: - Provide SG_IO access to BLOCK and EXECUTIVE class on Adaptec controllers - Use PRIVATE messages in SCSI-OSM because on some controllers normal SCSI class commands like READ or READ CAPACITY cause errors - Use new DMA and SG list creation function - Added workaround to limit sectors per request for Adaptec 2400A controllers Signed-off-by: Markus Lidel <Markus.Lidel@shadowconnect.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
27 lines
1.3 KiB
C
27 lines
1.3 KiB
C
typedef struct scsi_request Scsi_Request;
|
|
|
|
static Scsi_Request *dummy_cmdp; /* only used for sizeof */
|
|
|
|
typedef struct sg_scatter_hold { /* holding area for scsi scatter gather info */
|
|
unsigned short k_use_sg; /* Count of kernel scatter-gather pieces */
|
|
unsigned short sglist_len; /* size of malloc'd scatter-gather list ++ */
|
|
unsigned bufflen; /* Size of (aggregate) data buffer */
|
|
unsigned b_malloc_len; /* actual len malloc'ed in buffer */
|
|
void *buffer; /* Data buffer or scatter list (k_use_sg>0) */
|
|
char dio_in_use; /* 0->indirect IO (or mmap), 1->dio */
|
|
unsigned char cmd_opcode; /* first byte of command */
|
|
} Sg_scatter_hold;
|
|
|
|
typedef struct sg_request { /* SG_MAX_QUEUE requests outstanding per file */
|
|
Scsi_Request *my_cmdp; /* != 0 when request with lower levels */
|
|
struct sg_request *nextrp; /* NULL -> tail request (slist) */
|
|
struct sg_fd *parentfp; /* NULL -> not in use */
|
|
Sg_scatter_hold data; /* hold buffer, perhaps scatter list */
|
|
sg_io_hdr_t header; /* scsi command+info, see <scsi/sg.h> */
|
|
unsigned char sense_b[sizeof (dummy_cmdp->sr_sense_buffer)];
|
|
char res_used; /* 1 -> using reserve buffer, 0 -> not ... */
|
|
char orphan; /* 1 -> drop on sight, 0 -> normal */
|
|
char sg_io_owned; /* 1 -> packet belongs to SG_IO */
|
|
volatile char done; /* 0->before bh, 1->before read, 2->read */
|
|
} Sg_request;
|