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authorDan Williams <dan.j.williams@intel.com>2011-09-01 21:18:20 -0700
committerJames Bottomley <JBottomley@Parallels.com>2011-09-22 14:59:09 +0400
commit8ec6552f4a77d15f446b00aed364e3c12d38aa6c (patch)
treeefaa0dfc6479d28a14e5e778e8eb246ff94c360f /include/scsi/sas.h
parent9c224ac21506d29f5a6ff4df0c4cc9f97484fa25 (diff)
downloadlinux-8ec6552f4a77d15f446b00aed364e3c12d38aa6c.tar.bz2
[SCSI] libsas: sgpio write support
Add SFF-8485 v0.7 / SAS-1 smp-write-gpio register support to libsas. Defer SAS-2 support unless/until it defines an sgpio interface. Minimum implementation needed to get the lights blinking. try_test_sas_gpio_gp_bit() provides a common method to parse the incoming write data (raw bitstream), and the to_sas_gpio_gp_bit() helper routine can be used as a basis for the set/clear operations for the 'read' implementation. Host implementations parse as many bits (ODx.[012]) as are locally supported and report the number of registers successfully written. If the submitted data overruns the internal number of registers available report the write as a success with the number of bytes remaining reported in ->resid_len. Example (assuming an active backplane) set the "identify" pattern for the first 21 devices: smp_write_gpio --count=2 --data=92,49,24,92,24,92,49,24 -t 4 --index=1 /dev/bsg/sas_hostX Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'include/scsi/sas.h')
-rw-r--r--include/scsi/sas.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/scsi/sas.h b/include/scsi/sas.h
index e9fd02281381..a3001add0c66 100644
--- a/include/scsi/sas.h
+++ b/include/scsi/sas.h
@@ -195,6 +195,14 @@ enum sas_open_rej_reason {
SAS_OREJ_RSVD_RETRY = 18,
};
+enum sas_gpio_reg_type {
+ SAS_GPIO_REG_CFG = 0,
+ SAS_GPIO_REG_RX = 1,
+ SAS_GPIO_REG_RX_GP = 2,
+ SAS_GPIO_REG_TX = 3,
+ SAS_GPIO_REG_TX_GP = 4,
+};
+
struct dev_to_host_fis {
u8 fis_type; /* 0x34 */
u8 flags;