ehca: stop using struct ib_phys_buf

And simplify the calling convention for full-memory registrations.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> [core]
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/staging/rdma/ehca/ehca_classes.h

@@ -316,9 +316,8 @@ struct ehca_mr_pginfo {
 
 	union {
 		struct { /* type EHCA_MR_PGI_PHYS section */
-			int num_phys_buf;
-			struct ib_phys_buf *phys_buf_array;
-			u64 next_buf;
+			u64 addr;
+			u16 size;
 		} phy;
 		struct { /* type EHCA_MR_PGI_USER section */
 			struct ib_umem *region;

drivers/staging/rdma/ehca/ehca_mrmw.c

@@ -1289,7 +1289,6 @@ int ehca_reg_internal_maxmr(
 	u64 *iova_start;
 	u64 size_maxmr;
 	struct ehca_mr_pginfo pginfo;
-	struct ib_phys_buf ib_pbuf;
 	u32 num_kpages;
 	u32 num_hwpages;
 	u64 hw_pgsize;
@@ -1310,8 +1309,6 @@ int ehca_reg_internal_maxmr(
 	/* register internal max-MR on HCA */
 	size_maxmr = ehca_mr_len;
 	iova_start = (u64 *)ehca_map_vaddr((void *)(KERNELBASE + PHYSICAL_START));
-	ib_pbuf.addr = 0;
-	ib_pbuf.size = size_maxmr;
 	num_kpages = NUM_CHUNKS(((u64)iova_start % PAGE_SIZE) + size_maxmr,
 				PAGE_SIZE);
 	hw_pgsize = ehca_get_max_hwpage_size(shca);
@@ -1323,8 +1320,8 @@ int ehca_reg_internal_maxmr(
 	pginfo.num_kpages = num_kpages;
 	pginfo.num_hwpages = num_hwpages;
 	pginfo.hwpage_size = hw_pgsize;
-	pginfo.u.phy.num_phys_buf = 1;
-	pginfo.u.phy.phys_buf_array = &ib_pbuf;
+	pginfo.u.phy.addr = 0;
+	pginfo.u.phy.size = size_maxmr;
 
 	ret = ehca_reg_mr(shca, e_mr, iova_start, size_maxmr, 0, e_pd,
 			  &pginfo, &e_mr->ib.ib_mr.lkey,
@@ -1620,17 +1617,15 @@ static int ehca_set_pagebuf_phys(struct ehca_mr_pginfo *pginfo,
 				 u32 number, u64 *kpage)
 {
 	int ret = 0;
-	struct ib_phys_buf *pbuf;
+	u64 addr = pginfo->u.phy.addr;
+	u64 size = pginfo->u.phy.size;
 	u64 num_hw, offs_hw;
 	u32 i = 0;
 
-	/* loop over desired phys_buf_array entries */
-	while (i < number) {
-		pbuf   = pginfo->u.phy.phys_buf_array + pginfo->u.phy.next_buf;
-		num_hw  = NUM_CHUNKS((pbuf->addr % pginfo->hwpage_size) +
-				     pbuf->size, pginfo->hwpage_size);
-		offs_hw = (pbuf->addr & ~(pginfo->hwpage_size - 1)) /
-			pginfo->hwpage_size;
+	num_hw  = NUM_CHUNKS((addr % pginfo->hwpage_size) + size,
+				pginfo->hwpage_size);
+	offs_hw = (addr & ~(pginfo->hwpage_size - 1)) / pginfo->hwpage_size;
+
 	while (pginfo->next_hwpage < offs_hw + num_hw) {
 		/* sanity check */
 		if ((pginfo->kpage_cnt >= pginfo->num_kpages) ||
@@ -1645,12 +1640,12 @@ static int ehca_set_pagebuf_phys(struct ehca_mr_pginfo *pginfo,
 				     pginfo->num_hwpages, i);
 			return -EFAULT;
 		}
-			*kpage = (pbuf->addr & ~(pginfo->hwpage_size - 1)) +
+		*kpage = (addr & ~(pginfo->hwpage_size - 1)) +
 			 (pginfo->next_hwpage * pginfo->hwpage_size);
-			if ( !(*kpage) && pbuf->addr ) {
-				ehca_gen_err("pbuf->addr=%llx pbuf->size=%llx "
-					     "next_hwpage=%llx", pbuf->addr,
-					     pbuf->size, pginfo->next_hwpage);
+		if ( !(*kpage) && addr ) {
+			ehca_gen_err("addr=%llx size=%llx "
+				     "next_hwpage=%llx", addr,
+				     size, pginfo->next_hwpage);
 			return -EFAULT;
 		}
 		(pginfo->hwpage_cnt)++;
@@ -1667,10 +1662,9 @@ static int ehca_set_pagebuf_phys(struct ehca_mr_pginfo *pginfo,
 		if (i >= number) break;
 	}
 	if (pginfo->next_hwpage >= offs_hw + num_hw) {
-			(pginfo->u.phy.next_buf)++;
 		pginfo->next_hwpage = 0;
 	}
-	}
+
 	return ret;
 }