From 8ec6552f4a77d15f446b00aed364e3c12d38aa6c Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Thu, 1 Sep 2011 21:18:20 -0700 Subject: [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 Signed-off-by: James Bottomley --- include/scsi/sas.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/scsi/sas.h') 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; -- cgit v1.2.3