ipr: Inquiry IOA page 0xC4 during initialization.
Add an IOA Inquiry command for Page 0xC4 during IOA initialization to
collect cache capabilities, particularly to check if Sync IOA Write
Cache is supported.
Inquiry will happen right after Cap Inquiry on page 0xD0; and will
execute only if the "Supported Pages" field in Inquiry Page 0x0 shows
support for Page 0xC4. Otherwise, assume Sync IOA Write Cache is
not supported.
Signed-off-by: Gabriel Krisman Bertazi <krisman@linux.vnet.ibm.com>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Reviewed-by: Wen Xiong <wenxiong@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/ipr.h b/drivers/scsi/ipr.h
index 69257c4..7be1271 100644
--- a/drivers/scsi/ipr.h
+++ b/drivers/scsi/ipr.h
@@ -849,6 +849,16 @@
u8 page[IPR_INQUIRY_PAGE0_ENTRIES];
}__attribute__((packed));
+struct ipr_inquiry_pageC4 {
+ u8 peri_qual_dev_type;
+ u8 page_code;
+ u8 reserved1;
+ u8 len;
+ u8 cache_cap[4];
+#define IPR_CAP_SYNC_CACHE 0x08
+ u8 reserved2[20];
+} __packed;
+
struct ipr_hostrcb_device_data_entry {
struct ipr_vpd vpd;
struct ipr_res_addr dev_res_addr;
@@ -1322,6 +1332,7 @@
struct ipr_inquiry_page0 page0_data;
struct ipr_inquiry_page3 page3_data;
struct ipr_inquiry_cap cap;
+ struct ipr_inquiry_pageC4 pageC4_data;
struct ipr_mode_pages mode_pages;
struct ipr_supported_device supp_dev;
};