MFC r287293: Remove 600 bytes of port_priv from struct ctl_io_hdr.

This field used only for camtgt frontend, and once it any way preallocates
all requests, let it preallocate this memory too, not bothering core code.

2 files changed, 29 insertions, 41 deletions

diff --git a/sys/cam/ctl/ctl_io.h b/sys/cam/ctl/ctl_io.h
index 2c24591..fc4ddfb 100644
--- a/sys/cam/ctl/ctl_io.h
+++ b/sys/cam/ctl/ctl_io.h
@@ -173,35 +173,11 @@ union ctl_priv {
 #define	CTL_PRIV_MODEPAGE	1	/* Modepage info for config write */
 #define	CTL_PRIV_BACKEND	2	/* Reserved for block, RAIDCore */
 #define	CTL_PRIV_BACKEND_LUN	3	/* Backend LUN pointer */
-#define	CTL_PRIV_FRONTEND	4	/* LSI driver, ioctl front end */
-#define	CTL_PRIV_USER		5	/* Userland use */
+#define	CTL_PRIV_FRONTEND	4	/* Frontend storage */
+#define	CTL_PRIV_FRONTEND2	5	/* Another frontend storage */
 
 #define CTL_INVALID_PORTNAME 0xFF
 #define CTL_UNMAPPED_IID     0xFF
-/*
- * XXX KDM this size is for the port_priv variable in struct ctl_io_hdr
- * below.  This should be defined in terms of the size of struct
- * ctlfe_lun_cmd_info at the moment:
- * struct ctlfe_lun_cmd_info {
- *	int cur_transfer_index;
- * 	ctlfe_cmd_flags flags;
- * 	bus_dma_segment_t cam_sglist[32];
- * };
- *
- * This isn't really the way I'd prefer to do it, but it does make some
- * sense, AS LONG AS we can guarantee that there will always only be one
- * outstanding DMA request per ctl_io.  If that assumption isn't valid,
- * then we've got problems.
- *
- * At some point it may be nice switch CTL over to using CCBs for
- * everything.  At that point we can probably use the ATIO/CTIO model, so
- * that multiple simultaneous DMAs per command will just work.
- *
- * Also note that the current size, 600, is appropriate for 64-bit
- * architectures, but is overkill for 32-bit architectures.  Need a way to
- * figure out the size at compile time, or just get rid of this altogether.
- */
-#define	CTL_PORT_PRIV_SIZE	600
 
 struct ctl_sg_entry {
 	void	*addr;
@@ -268,7 +244,6 @@ struct ctl_io_hdr {
 	union ctl_io	  *serializing_sc;
 	void		  *pool;	/* I/O pool */
 	union ctl_priv	  ctl_private[CTL_NUM_PRIV];/* CTL private area */
-	uint8_t		  port_priv[CTL_PORT_PRIV_SIZE];/* PORT private area*/
 	struct ctl_sg_entry remote_sglist[CTL_NUM_SG_ENTRIES];
 	struct ctl_sg_entry remote_dma_sglist[CTL_NUM_SG_ENTRIES];
 	struct ctl_sg_entry local_sglist[CTL_NUM_SG_ENTRIES];
diff --git a/sys/cam/ctl/scsi_ctl.c b/sys/cam/ctl/scsi_ctl.c
index 367d8c9..15912e2 100644
--- a/sys/cam/ctl/scsi_ctl.c
+++ b/sys/cam/ctl/scsi_ctl.c
@@ -119,11 +119,7 @@ typedef enum {
 	CTLFE_CMD_PIECEWISE	= 0x01
 } ctlfe_cmd_flags;
 
-/*
- * The size limit of this structure is CTL_PORT_PRIV_SIZE, from ctl_io.h.
- * Currently that is 600 bytes.
- */
-struct ctlfe_lun_cmd_info {
+struct ctlfe_cmd_info {
 	int cur_transfer_index;
 	size_t cur_transfer_off;
 	ctlfe_cmd_flags flags;
@@ -135,7 +131,6 @@ struct ctlfe_lun_cmd_info {
 #define CTLFE_MAX_SEGS	32
 	bus_dma_segment_t cam_sglist[CTLFE_MAX_SEGS];
 };
-CTASSERT(sizeof(struct ctlfe_lun_cmd_info) <= CTL_PORT_PRIV_SIZE);
 
 /*
  * When we register the adapter/bus, request that this many ctl_ios be
@@ -533,6 +528,7 @@ ctlferegister(struct cam_periph *periph, void *arg)
 	for (i = 0; i < CTLFE_ATIO_PER_LUN; i++) {
 		union ccb *new_ccb;
 		union ctl_io *new_io;
+		struct ctlfe_cmd_info *cmd_info;
 
 		new_ccb = (union ccb *)malloc(sizeof(*new_ccb), M_CTLFE,
 					      M_ZERO|M_NOWAIT);
@@ -546,6 +542,15 @@ ctlferegister(struct cam_periph *periph, void *arg)
 			status = CAM_RESRC_UNAVAIL;
 			break;
 		}
+		cmd_info = malloc(sizeof(*cmd_info), M_CTLFE,
+		    M_ZERO | M_NOWAIT);
+		if (cmd_info == NULL) {
+			ctl_free_io(new_io);
+			free(new_ccb, M_CTLFE);
+			status = CAM_RESRC_UNAVAIL;
+			break;
+		}
+		new_io->io_hdr.ctl_private[CTL_PRIV_FRONTEND2].ptr = cmd_info;
 		softc->atios_alloced++;
 		new_ccb->ccb_h.io_ptr = new_io;
 
@@ -556,6 +561,7 @@ ctlferegister(struct cam_periph *periph, void *arg)
 		xpt_action(new_ccb);
 		status = new_ccb->ccb_h.status;
 		if ((status & CAM_STATUS_MASK) != CAM_REQ_INPROG) {
+			free(cmd_info, M_CTLFE);
 			ctl_free_io(new_io);
 			free(new_ccb, M_CTLFE);
 			break;
@@ -686,13 +692,13 @@ ctlfedata(struct ctlfe_lun_softc *softc, union ctl_io *io,
     u_int16_t *sglist_cnt)
 {
 	struct ctlfe_softc *bus_softc;
-	struct ctlfe_lun_cmd_info *cmd_info;
+	struct ctlfe_cmd_info *cmd_info;
 	struct ctl_sg_entry *ctl_sglist;
 	bus_dma_segment_t *cam_sglist;
 	size_t off;
 	int i, idx;
 
-	cmd_info = (struct ctlfe_lun_cmd_info *)io->io_hdr.port_priv;
+	cmd_info = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND2].ptr;
 	bus_softc = softc->parent_softc;
 
 	/*
@@ -768,7 +774,7 @@ static void
 ctlfestart(struct cam_periph *periph, union ccb *start_ccb)
 {
 	struct ctlfe_lun_softc *softc;
-	struct ctlfe_lun_cmd_info *cmd_info;
+	struct ctlfe_cmd_info *cmd_info;
 	struct ccb_hdr *ccb_h;
 	struct ccb_accept_tio *atio;
 	struct ccb_scsiio *csio;
@@ -796,7 +802,7 @@ ctlfestart(struct cam_periph *periph, union ccb *start_ccb)
 
 	flags = atio->ccb_h.flags &
 		(CAM_DIS_DISCONNECT|CAM_TAG_ACTION_VALID|CAM_DIR_MASK);
-	cmd_info = (struct ctlfe_lun_cmd_info *)io->io_hdr.port_priv;
+	cmd_info = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND2].ptr;
 	cmd_info->cur_transfer_index = 0;
 	cmd_info->cur_transfer_off = 0;
 	cmd_info->flags = 0;
@@ -968,12 +974,17 @@ static void
 ctlfe_free_ccb(struct cam_periph *periph, union ccb *ccb)
 {
 	struct ctlfe_lun_softc *softc;
+	union ctl_io *io;
+	struct ctlfe_cmd_info *cmd_info;
 
 	softc = (struct ctlfe_lun_softc *)periph->softc;
+	io = ccb->ccb_h.io_ptr;
 
 	switch (ccb->ccb_h.func_code) {
 	case XPT_ACCEPT_TARGET_IO:
 		softc->atios_freed++;
+		cmd_info = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND2].ptr;
+		free(cmd_info, M_CTLFE);
 		break;
 	case XPT_IMMEDIATE_NOTIFY:
 	case XPT_NOTIFY_ACKNOWLEDGE:
@@ -983,7 +994,7 @@ ctlfe_free_ccb(struct cam_periph *periph, union ccb *ccb)
 		break;
 	}
 
-	ctl_free_io(ccb->ccb_h.io_ptr);
+	ctl_free_io(io);
 	free(ccb, M_CTLFE);
 
 	KASSERT(softc->atios_freed <= softc->atios_alloced, ("%s: "
@@ -1078,6 +1089,7 @@ ctlfedone(struct cam_periph *periph, union ccb *done_ccb)
 {
 	struct ctlfe_lun_softc *softc;
 	struct ctlfe_softc *bus_softc;
+	struct ctlfe_cmd_info *cmd_info;
 	struct ccb_accept_tio *atio = NULL;
 	union ctl_io *io = NULL;
 	struct mtx *mtx;
@@ -1139,10 +1151,12 @@ ctlfedone(struct cam_periph *periph, union ccb *done_ccb)
 		 */
 		mtx_unlock(mtx);
 		io = done_ccb->ccb_h.io_ptr;
+		cmd_info = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND2].ptr;
 		ctl_zero_io(io);
 
 		/* Save pointers on both sides */
 		io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = done_ccb;
+		io->io_hdr.ctl_private[CTL_PRIV_FRONTEND2].ptr = cmd_info;
 		done_ccb->ccb_h.io_ptr = io;
 
 		/*
@@ -1291,12 +1305,11 @@ ctlfedone(struct cam_periph *periph, union ccb *done_ccb)
 				return;
 			}
 		} else {
-			struct ctlfe_lun_cmd_info *cmd_info;
+			struct ctlfe_cmd_info *cmd_info;
 			struct ccb_scsiio *csio;
 
 			csio = &done_ccb->csio;
-			cmd_info = (struct ctlfe_lun_cmd_info *)
-				io->io_hdr.port_priv;
+			cmd_info = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND2].ptr;
 
 			io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG;