Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI updates from James Bottomley:
 "This update includes the usual round of major driver updates (ncr5380,
  lpfc, hisi_sas, megaraid_sas, ufs, ibmvscsis, mpt3sas).

  There's also an assortment of minor fixes, mostly in error legs or
  other not very user visible stuff. The major change is the
  pci_alloc_irq_vectors replacement for the old pci_msix_.. calls; this
  effectively makes IRQ mapping generic for the drivers and allows
  blk_mq to use the information"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (256 commits)
  scsi: qla4xxx: switch to pci_alloc_irq_vectors
  scsi: hisi_sas: support deferred probe for v2 hw
  scsi: megaraid_sas: switch to pci_alloc_irq_vectors
  scsi: scsi_devinfo: remove synchronous ALUA for NETAPP devices
  scsi: be2iscsi: set errno on error path
  scsi: be2iscsi: set errno on error path
  scsi: hpsa: fallback to use legacy REPORT PHYS command
  scsi: scsi_dh_alua: Fix RCU annotations
  scsi: hpsa: use %phN for short hex dumps
  scsi: hisi_sas: fix free'ing in probe and remove
  scsi: isci: switch to pci_alloc_irq_vectors
  scsi: ipr: Fix runaway IRQs when falling back from MSI to LSI
  scsi: dpt_i2o: double free on error path
  scsi: cxlflash: Migrate scsi command pointer to AFU command
  scsi: cxlflash: Migrate IOARRIN specific routines to function pointers
  scsi: cxlflash: Cleanup queuecommand()
  scsi: cxlflash: Cleanup send_tmf()
  scsi: cxlflash: Remove AFU command lock
  scsi: cxlflash: Wait for active AFU commands to timeout upon tear down
  scsi: cxlflash: Remove private command pool
  ...

1 files changed, 22 insertions, 17 deletions

diff --git a/drivers/scsi/cxlflash/common.h b/drivers/scsi/cxlflash/common.h
index 6e6815545a71..0e9de5d62da2 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;
@@ -62,11 +63,6 @@ static inline void check_sizes(void)
 /* AFU defines a fixed size of 4K for command buffers (borrow 4K page define) */
 #define CMD_BUFSIZE     SIZE_4K
 
-/* flags in IOA status area for host use */
-#define B_DONE       0x01
-#define B_ERROR      0x02	/* set with B_DONE */
-#define B_TIMEOUT    0x04	/* set with B_DONE & B_ERROR */
-
 enum cxlflash_lr_state {
 	LINK_RESET_INVALID,
 	LINK_RESET_REQUIRED,
@@ -132,12 +128,9 @@ struct cxlflash_cfg {
 struct afu_cmd {
 	struct sisl_ioarcb rcb;	/* IOARCB (cache line aligned) */
 	struct sisl_ioasa sa;	/* IOASA must follow IOARCB */
-	spinlock_t slock;
-	struct completion cevent;
-	char *buf;		/* per command buffer */
 	struct afu *parent;
-	int slot;
-	atomic_t free;
+	struct scsi_cmnd *scp;
+	struct completion cevent;
 
 	u8 cmd_tmf:1;
 
@@ -147,19 +140,31 @@ 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. */
 
 	u64 rrq_entry[NUM_RRQ_ENTRY];	/* 2K RRQ */
-	/*
-	 * Command & data for AFU commands.
-	 */
-	struct afu_cmd cmd[CXLFLASH_NUM_CMDS];
 
 	/* Beware of alignment till here. Preferably introduce new
 	 * fields after this point
 	 */
 
+	int (*send_cmd)(struct afu *, struct afu_cmd *);
+	void (*context_reset)(struct afu_cmd *);
+
 	/* AFU HW */
 	struct cxl_ioctl_start_work work;
 	struct cxlflash_afu_map __iomem *afu_map;	/* entire MMIO map */
@@ -173,10 +178,10 @@ struct afu {
 	u64 *hrrq_end;
 	u64 *hrrq_curr;
 	bool toggle;
-	bool read_room;
-	atomic64_t room;
+	atomic_t cmds_active;	/* Number of currently active AFU commands */
+	s64 room;
+	spinlock_t rrin_slock; /* Lock to rrin queuing and cmd_room updates */
 	u64 hb;
-	u32 cmd_couts;		/* Number of command checkouts */
 	u32 internal_lun;	/* User-desired LUN mode for this AFU */
 
 	char version[16];