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authorBoaz Harrosh <bharrosh@panasas.com>2007-12-13 06:47:40 -0500
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-01-30 14:03:40 -0500
commit30b0c37b27485a9cb897bfe3824f6f517b8c80d6 (patch)
tree22643da8e175ff7badf2413dc8c84b2e99613a6f /include/scsi/scsi_eh.h
parentbb52d82f45df3a2661d88befba7c79a7db8be496 (diff)
[SCSI] implement scsi_data_buffer
In preparation for bidi we abstract all IO members of scsi_cmnd, that will need to duplicate, into a substructure. - Group all IO members of scsi_cmnd into a scsi_data_buffer structure. - Adjust accessors to new members. - scsi_{alloc,free}_sgtable receive a scsi_data_buffer instead of scsi_cmnd. And work on it. - Adjust scsi_init_io() and scsi_release_buffers() for above change. - Fix other parts of scsi_lib/scsi.c to members migration. Use accessors where appropriate. - fix Documentation about scsi_cmnd in scsi_host.h - scsi_error.c * Changed needed members of struct scsi_eh_save. * Careful considerations in scsi_eh_prep/restore_cmnd. - sd.c and sr.c * sd and sr would adjust IO size to align on device's block size so code needs to change once we move to scsi_data_buff implementation. * Convert code to use scsi_for_each_sg * Use data accessors where appropriate. - tgt: convert libsrp to use scsi_data_buffer - isd200: This driver still bangs on scsi_cmnd IO members, so need changing [jejb: rebased on top of sg_table patches fixed up conflicts and used the synergy to eliminate use_sg and sg_count] Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'include/scsi/scsi_eh.h')
-rw-r--r--include/scsi/scsi_eh.h8
1 files changed, 3 insertions, 5 deletions
diff --git a/include/scsi/scsi_eh.h b/include/scsi/scsi_eh.h
index d21b8913ceb3..1e08be1466ee 100644
--- a/include/scsi/scsi_eh.h
+++ b/include/scsi/scsi_eh.h
@@ -68,16 +68,14 @@ extern int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len,
68extern int scsi_reset_provider(struct scsi_device *, int); 68extern int scsi_reset_provider(struct scsi_device *, int);
69 69
70struct scsi_eh_save { 70struct scsi_eh_save {
71 /* saved state */
71 int result; 72 int result;
72 enum dma_data_direction data_direction; 73 enum dma_data_direction data_direction;
73 unsigned char cmd_len; 74 unsigned char cmd_len;
74 unsigned char cmnd[MAX_COMMAND_SIZE]; 75 unsigned char cmnd[MAX_COMMAND_SIZE];
76 struct scsi_data_buffer sdb;
75 77
76 void *buffer; 78 /* new command support */
77 unsigned bufflen;
78 unsigned short use_sg;
79 int resid;
80
81 struct scatterlist sense_sgl; 79 struct scatterlist sense_sgl;
82}; 80};
83 81