@@ -71,9 +71,9 @@ int copy_data(struct rxe_pd *pd, int access, struct rxe_dma_info *dma,
void *addr, int length, enum rxe_mr_copy_dir dir);
int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
int sg_nents, unsigned int *sg_offset);
-void *iova_to_vaddr(struct rxe_mr *mr, u64 iova, int length);
int rxe_mr_do_atomic_op(struct rxe_mr *mr, u64 iova, int opcode,
u64 compare, u64 swap_add, u64 *orig_val);
+int rxe_mr_do_atomic_write(struct rxe_mr *mr, u64 iova, u64 value);
struct rxe_mr *lookup_mr(struct rxe_pd *pd, int access, u32 key,
enum rxe_mr_lookup_type type);
int mr_check_range(struct rxe_mr *mr, u64 iova, size_t length);
@@ -297,7 +297,7 @@ static void lookup_iova(struct rxe_mr *mr, u64 iova, int *m_out, int *n_out,
}
}
-void *iova_to_vaddr(struct rxe_mr *mr, u64 iova, int length)
+static void *iova_to_vaddr(struct rxe_mr *mr, u64 iova, int length)
{
size_t offset;
int m, n;
@@ -565,6 +565,42 @@ int rxe_mr_do_atomic_op(struct rxe_mr *mr, u64 iova, int opcode,
return 0;
}
+/* only implemented for 64 bit architectures */
+#if defined CONFIG_64BIT
+int rxe_mr_do_atomic_write(struct rxe_mr *mr, u64 iova, u64 value)
+{
+ u64 *va;
+
+ /* See IBA oA19-28 */
+ if (unlikely(mr->state != RXE_MR_STATE_VALID)) {
+ rxe_dbg_mr(mr, "mr not in valid state");
+ return RESPST_ERR_RKEY_VIOLATION;
+ }
+
+ va = iova_to_vaddr(mr, iova, sizeof(value));
+ if (unlikely(!va)) {
+ rxe_dbg_mr(mr, "iova out of range");
+ return RESPST_ERR_RKEY_VIOLATION;
+ }
+
+ /* See IBA A19.4.2 */
+ if (unlikely((uintptr_t)va & 0x7 || iova & 0x7)) {
+ rxe_dbg_mr(mr, "misaligned address");
+ return RESPST_ERR_MISALIGNED_ATOMIC;
+ }
+
+ /* Do atomic write after all prior operations have completed */
+ smp_store_release(va, value);
+
+ return 0;
+}
+#else
+int rxe_mr_do_atomic_write(struct rxe_mr *mr, u64 iova, u64 value)
+{
+ return RESPST_ERR_UNSUPPORTED_OPCODE;
+}
+#endif
+
int advance_dma_data(struct rxe_dma_info *dma, unsigned int length)
{
struct rxe_sge *sge = &dma->sge[dma->cur_sge];
@@ -723,30 +723,32 @@ static enum resp_states atomic_reply(struct rxe_qp *qp,
return RESPST_ACKNOWLEDGE;
}
-#ifdef CONFIG_64BIT
-static enum resp_states do_atomic_write(struct rxe_qp *qp,
- struct rxe_pkt_info *pkt)
+static enum resp_states atomic_write_reply(struct rxe_qp *qp,
+ struct rxe_pkt_info *pkt)
{
- struct rxe_mr *mr = qp->resp.mr;
- int payload = payload_size(pkt);
- u64 src, *dst;
-
- if (mr->state != RXE_MR_STATE_VALID)
- return RESPST_ERR_RKEY_VIOLATION;
+ struct resp_res *res = qp->resp.res;
+ struct rxe_mr *mr;
+ u64 value;
+ u64 iova;
+ int err;
- memcpy(&src, payload_addr(pkt), payload);
+ if (!res) {
+ res = rxe_prepare_res(qp, pkt, RXE_ATOMIC_WRITE_MASK);
+ qp->resp.res = res;
+ }
- dst = iova_to_vaddr(mr, qp->resp.va + qp->resp.offset, payload);
- /* check vaddr is 8 bytes aligned. */
- if (!dst || (uintptr_t)dst & 7)
- return RESPST_ERR_MISALIGNED_ATOMIC;
+ if (res->replay)
+ return RESPST_ACKNOWLEDGE;
- /* Do atomic write after all prior operations have completed */
- smp_store_release(dst, src);
+ mr = qp->resp.mr;
+ value = *(u64 *)payload_addr(pkt);
+ iova = qp->resp.va + qp->resp.offset;
- /* decrease resp.resid to zero */
- qp->resp.resid -= sizeof(payload);
+ err = rxe_mr_do_atomic_write(mr, iova, value);
+ if (err)
+ return err;
+ qp->resp.resid = 0;
qp->resp.msn++;
/* next expected psn, read handles this separately */
@@ -755,29 +757,8 @@ static enum resp_states do_atomic_write(struct rxe_qp *qp,
qp->resp.opcode = pkt->opcode;
qp->resp.status = IB_WC_SUCCESS;
- return RESPST_ACKNOWLEDGE;
-}
-#else
-static enum resp_states do_atomic_write(struct rxe_qp *qp,
- struct rxe_pkt_info *pkt)
-{
- return RESPST_ERR_UNSUPPORTED_OPCODE;
-}
-#endif /* CONFIG_64BIT */
-
-static enum resp_states atomic_write_reply(struct rxe_qp *qp,
- struct rxe_pkt_info *pkt)
-{
- struct resp_res *res = qp->resp.res;
- if (!res) {
- res = rxe_prepare_res(qp, pkt, RXE_ATOMIC_WRITE_MASK);
- qp->resp.res = res;
- }
-
- if (res->replay)
- return RESPST_ACKNOWLEDGE;
- return do_atomic_write(qp, pkt);
+ return RESPST_ACKNOWLEDGE;
}
static struct sk_buff *prepare_ack_packet(struct rxe_qp *qp,
Isolate mr specific code from atomic_write_reply() in rxe_resp.c into a subroutine rxe_mr_do_atomic_write() in rxe_mr.c. Check length for atomic write operation. Make iova_to_vaddr() static. Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> --- drivers/infiniband/sw/rxe/rxe_loc.h | 2 +- drivers/infiniband/sw/rxe/rxe_mr.c | 38 ++++++++++++++++- drivers/infiniband/sw/rxe/rxe_resp.c | 61 ++++++++++------------------ 3 files changed, 59 insertions(+), 42 deletions(-)