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RDMA-rxe: Isolate mr code from atomic_write_reply()

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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.

Link: https://lore.kernel.org/r/20230119235936.19728-5-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Bob Pearson 2023-01-19 17:59:35 -06:00 committed by Jason Gunthorpe
parent f04d5b3d91
commit d8bdb0ebca
3 changed files with 62 additions and 45 deletions
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2
drivers/infiniband/sw/rxe/rxe_loc.h
View file

@ -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);

38
drivers/infiniband/sw/rxe/rxe_mr.c
View file

@ -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];

67
drivers/infiniband/sw/rxe/rxe_resp.c
View file

@ -723,52 +723,14 @@ 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)
{
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;
memcpy(&src, payload_addr(pkt), payload);
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;
/* Do atomic write after all prior operations have completed */
smp_store_release(dst, src);
/* decrease resp.resid to zero */
qp->resp.resid -= sizeof(payload);
qp->resp.msn++;
/* next expected psn, read handles this separately */
qp->resp.psn = (pkt->psn + 1) & BTH_PSN_MASK;
qp->resp.ack_psn = qp->resp.psn;
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;
struct rxe_mr *mr;
u64 value;
u64 iova;
int err;
if (!res) {
res = rxe_prepare_res(qp, pkt, RXE_ATOMIC_WRITE_MASK);
@ -777,7 +739,26 @@ static enum resp_states atomic_write_reply(struct rxe_qp *qp,
if (res->replay)
return RESPST_ACKNOWLEDGE;
return do_atomic_write(qp, pkt);
mr = qp->resp.mr;
value = *(u64 *)payload_addr(pkt);
iova = qp->resp.va + qp->resp.offset;
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 */
qp->resp.psn = (pkt->psn + 1) & BTH_PSN_MASK;
qp->resp.ack_psn = qp->resp.psn;
qp->resp.opcode = pkt->opcode;
qp->resp.status = IB_WC_SUCCESS;
return RESPST_ACKNOWLEDGE;
}
static struct sk_buff *prepare_ack_packet(struct rxe_qp *qp,