diff options
| author | David Woodhouse <dwmw2@infradead.org> | 2008-02-03 18:29:41 +1100 |
|---|---|---|
| committer | David Woodhouse <dwmw2@infradead.org> | 2008-02-03 18:30:32 +1100 |
| commit | c1f3ee120bb61045b1c0a3ead620d1d65af47130 (patch) | |
| tree | 908430bf2b47fe8e96ac623ae7ab6dd5698d0938 /include/scsi/scsi.h | |
| parent | e619a75ff6201b567a539e787aa9af9bc63a3187 (diff) | |
| parent | 9135f1901ee6449dfe338adf6e40e9c2025b8150 (diff) | |
| download | kernel_samsung_smdk4412-c1f3ee120bb61045b1c0a3ead620d1d65af47130.zip kernel_samsung_smdk4412-c1f3ee120bb61045b1c0a3ead620d1d65af47130.tar.gz kernel_samsung_smdk4412-c1f3ee120bb61045b1c0a3ead620d1d65af47130.tar.bz2 | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
Diffstat (limited to 'include/scsi/scsi.h')
| -rw-r--r-- | include/scsi/scsi.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h index 702fcfe..8225157 100644 --- a/include/scsi/scsi.h +++ b/include/scsi/scsi.h @@ -11,6 +11,25 @@ #include <linux/types.h> /* + * The maximum number of SG segments that we will put inside a + * scatterlist (unless chaining is used). Should ideally fit inside a + * single page, to avoid a higher order allocation. We could define this + * to SG_MAX_SINGLE_ALLOC to pack correctly at the highest order. The + * minimum value is 32 + */ +#define SCSI_MAX_SG_SEGMENTS 128 + +/* + * Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit + * is totally arbitrary, a setting of 2048 will get you at least 8mb ios. + */ +#ifdef ARCH_HAS_SG_CHAIN +#define SCSI_MAX_SG_CHAIN_SEGMENTS 2048 +#else +#define SCSI_MAX_SG_CHAIN_SEGMENTS SCSI_MAX_SG_SEGMENTS +#endif + +/* * SCSI command lengths */ @@ -83,6 +102,7 @@ extern const unsigned char scsi_command_size[8]; #define READ_TOC 0x43 #define LOG_SELECT 0x4c #define LOG_SENSE 0x4d +#define XDWRITEREAD_10 0x53 #define MODE_SELECT_10 0x55 #define RESERVE_10 0x56 #define RELEASE_10 0x57 |