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authorHarry Zhang <harry.zhang@amd.com>2010-04-23 17:28:38 +0800
committerJeff Garzik <jgarzik@redhat.com>2010-05-14 17:35:51 -0400
commitc06231661e4fb5f2f50c73ff33702937a11764cf (patch)
treee82300639ad09429fb3a6881bb6985363dd9ddbe /drivers/ata/ahci.h
parent008dbd61ebee3e647f63bbe8315192e1331cd75f (diff)
ahci: add "em_buffer" attribute for AHCI hosts
Add "em_buffer" attribute for SATA AHCI hosts to provide a way for userland to access AHCI EM (enclosure management) buffer directly if the host supports EM. AHCI driver should support SGPIO EM messages. However the SATA/AHCI specs did not define the SGPIO message format filled in EM buffer. Different HW vendors may have different definitions. The mainly purpose of this attribute is to solve this issue by allowing HW vendors to provide userland drivers and tools for their SGPIO initiators. Signed-off-by: Harry Zhang <harry.zhang@amd.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata/ahci.h')
-rw-r--r--drivers/ata/ahci.h10
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index 5edce4447d84..7113c5724471 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -224,9 +224,12 @@ enum {
EM_MAX_RETRY = 5,
/* em_ctl bits */
- EM_CTL_RST = (1 << 9), /* Reset */
- EM_CTL_TM = (1 << 8), /* Transmit Message */
- EM_CTL_ALHD = (1 << 26), /* Activity LED */
+ EM_CTL_RST = (1 << 9), /* Reset */
+ EM_CTL_TM = (1 << 8), /* Transmit Message */
+ EM_CTL_MR = (1 << 0), /* Message Recieved */
+ EM_CTL_ALHD = (1 << 26), /* Activity LED */
+ EM_CTL_XMT = (1 << 25), /* Transmit Only */
+ EM_CTL_SMB = (1 << 24), /* Single Message Buffer */
/* em message type */
EM_MSG_TYPE_LED = (1 << 0), /* LED */
@@ -288,6 +291,7 @@ struct ahci_host_priv {
u32 saved_cap2; /* saved initial cap2 */
u32 saved_port_map; /* saved initial port_map */
u32 em_loc; /* enclosure management location */
+ u32 em_buf_sz; /* EM buffer size in byte */
u32 em_msg_type; /* EM message type */
};