Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

Pull rdma updates from Jason Gunthorpe:
 "Many small changes across the subystem, some highlights:

   - Usual driver cleanups in qedr, siw, erdma, hfi1, mlx4/5, irdma,
     mthca, hns, and bnxt_re

   - siw now works over tunnel and other netdevs with a MAC address by
     removing assumptions about a MAC/GID from the connection manager

   - "Doorbell Pacing" for bnxt_re - this is a best effort scheme to
     allow userspace to slow down the doorbell rings if the HW gets full

   - irdma egress VLAN priority, better QP/WQ sizing

   - rxe bug fixes in queue draining and srq resizing

   - Support more ethernet speed options in the core layer

   - DMABUF support for bnxt_re

   - Multi-stage MTT support for erdma to allow much bigger MR
     registrations

   - A irdma fix with a CVE that came in too late to go to -rc, missing
     bounds checking for 0 length MRs"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (87 commits)
  IB/hfi1: Reduce printing of errors during driver shut down
  RDMA/hfi1: Move user SDMA system memory pinning code to its own file
  RDMA/hfi1: Use list_for_each_entry() helper
  RDMA/mlx5: Fix trailing */ formatting in block comment
  RDMA/rxe: Fix redundant break statement in switch-case.
  RDMA/efa: Fix wrong resources deallocation order
  RDMA/siw: Call llist_reverse_order in siw_run_sq
  RDMA/siw: Correct wrong debug message
  RDMA/siw: Balance the reference of cep->kref in the error path
  Revert "IB/isert: Fix incorrect release of isert connection"
  RDMA/bnxt_re: Fix kernel doc errors
  RDMA/irdma: Prevent zero-length STAG registration
  RDMA/erdma: Implement hierarchical MTT
  RDMA/erdma: Refactor the storage structure of MTT entries
  RDMA/erdma: Renaming variable names and field names of struct erdma_mem
  RDMA/hns: Support hns HW stats
  RDMA/hns: Dump whole QP/CQ/MR resource in raw
  RDMA/irdma: Add missing kernel-doc in irdma_setup_umode_qp()
  RDMA/mlx4: Copy union directly
  RDMA/irdma: Drop unused kernel push code
  ...

1 files changed, 26 insertions, 10 deletions

diff --git a/drivers/infiniband/hw/erdma/erdma_verbs.h b/drivers/infiniband/hw/erdma/erdma_verbs.h
index 429fc3063f98..eb9c0f92fb6f 100644
--- a/drivers/infiniband/hw/erdma/erdma_verbs.h
+++ b/drivers/infiniband/hw/erdma/erdma_verbs.h
@@ -65,7 +65,7 @@ struct erdma_pd {
  * MemoryRegion definition.
  */
 #define ERDMA_MAX_INLINE_MTT_ENTRIES 4
-#define MTT_SIZE(mtt_cnt) (mtt_cnt << 3) /* per mtt takes 8 Bytes. */
+#define MTT_SIZE(mtt_cnt) ((mtt_cnt) << 3) /* per mtt entry takes 8 Bytes. */
 #define ERDMA_MR_MAX_MTT_CNT 524288
 #define ERDMA_MTT_ENTRY_SIZE 8
 
@@ -73,8 +73,8 @@ struct erdma_pd {
 #define ERDMA_MR_TYPE_FRMR 1
 #define ERDMA_MR_TYPE_DMA 2
 
-#define ERDMA_MR_INLINE_MTT 0
-#define ERDMA_MR_INDIRECT_MTT 1
+#define ERDMA_MR_MTT_0LEVEL 0
+#define ERDMA_MR_MTT_1LEVEL 1
 
 #define ERDMA_MR_ACC_RA BIT(0)
 #define ERDMA_MR_ACC_LR BIT(1)
@@ -90,10 +90,28 @@ static inline u8 to_erdma_access_flags(int access)
 	       (access & IB_ACCESS_REMOTE_ATOMIC ? ERDMA_MR_ACC_RA : 0);
 }
 
+/* Hierarchical storage structure for MTT entries */
+struct erdma_mtt {
+	u64 *buf;
+	size_t size;
+
+	bool continuous;
+	union {
+		dma_addr_t buf_dma;
+		struct {
+			struct scatterlist *sglist;
+			u32 nsg;
+			u32 level;
+		};
+	};
+
+	struct erdma_mtt *low_level;
+};
+
 struct erdma_mem {
 	struct ib_umem *umem;
-	void *mtt_buf;
-	u32 mtt_type;
+	struct erdma_mtt *mtt;
+
 	u32 page_size;
 	u32 page_offset;
 	u32 page_cnt;
@@ -101,8 +119,6 @@ struct erdma_mem {
 
 	u64 va;
 	u64 len;
-
-	u64 mtt_entry[ERDMA_MAX_INLINE_MTT_ENTRIES];
 };
 
 struct erdma_mr {
@@ -121,8 +137,8 @@ struct erdma_user_dbrecords_page {
 };
 
 struct erdma_uqp {
-	struct erdma_mem sq_mtt;
-	struct erdma_mem rq_mtt;
+	struct erdma_mem sq_mem;
+	struct erdma_mem rq_mem;
 
 	dma_addr_t sq_db_info_dma_addr;
 	dma_addr_t rq_db_info_dma_addr;
@@ -234,7 +250,7 @@ struct erdma_kcq_info {
 };
 
 struct erdma_ucq_info {
-	struct erdma_mem qbuf_mtt;
+	struct erdma_mem qbuf_mem;
 	struct erdma_user_dbrecords_page *user_dbr_page;
 	dma_addr_t db_info_dma_addr;
 };