scsi: cxlflash: Use cmd_size for private commands
Instead of using a private pool of AFU commands, use cmd_size to prime
the private pool of SCSI commands such that they are allocated with a
size large enough to contain an aligned AFU command. Use scsi_cmd_priv()
to derive the aligned/zeroed private command on queuecommand and TMF
paths. Remove cmd_checkout() as it is no longer required. The remaining
AFU private command infrastructure will be removed in a cleanup commit.
Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Acked-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/cxlflash/common.h b/drivers/scsi/cxlflash/common.h
index 4525514..539908f 100644
--- a/drivers/scsi/cxlflash/common.h
+++ b/drivers/scsi/cxlflash/common.h
@@ -19,6 +19,7 @@
#include <linux/rwsem.h>
#include <linux/types.h>
#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
extern const struct file_operations cxlflash_cxl_fops;
@@ -146,6 +147,19 @@ struct afu_cmd {
*/
} __aligned(cache_line_size());
+static inline struct afu_cmd *sc_to_afuc(struct scsi_cmnd *sc)
+{
+ return PTR_ALIGN(scsi_cmd_priv(sc), __alignof__(struct afu_cmd));
+}
+
+static inline struct afu_cmd *sc_to_afucz(struct scsi_cmnd *sc)
+{
+ struct afu_cmd *afuc = sc_to_afuc(sc);
+
+ memset(afuc, 0, sizeof(*afuc));
+ return afuc;
+}
+
struct afu {
/* Stuff requiring alignment go first. */