Implement memory access through MWs.
Add rules checks from IBA.
Signed-off-by: Bob Pearson <rpearson@xxxxxxx>
---
drivers/infiniband/sw/rxe/rxe_loc.h | 19 +++---
drivers/infiniband/sw/rxe/rxe_mr.c | 82 +++++++++++++++-----------
drivers/infiniband/sw/rxe/rxe_mw.c | 57 +++++++++++++++---
drivers/infiniband/sw/rxe/rxe_req.c | 15 ++---
drivers/infiniband/sw/rxe/rxe_resp.c | 83 ++++++++++++++++++++-------
drivers/infiniband/sw/rxe/rxe_verbs.h | 1 +
6 files changed, 177 insertions(+), 80 deletions(-)
diff --git a/drivers/infiniband/sw/rxe/rxe_loc.h b/drivers/infiniband/sw/rxe/rxe_loc.h
index 1ee6270d3f2a..b824aeeb8b6b 100644
--- a/drivers/infiniband/sw/rxe/rxe_loc.h
+++ b/drivers/infiniband/sw/rxe/rxe_loc.h
@@ -100,29 +100,30 @@ enum lookup_type {
lookup_remote,
};
-struct rxe_mr *lookup_mr(struct rxe_pd *pd, int access, u32 key,
- enum lookup_type type);
-
-int mr_check_range(struct rxe_mr *mr, u64 iova, size_t length);
-
-void rxe_mr_cleanup(struct rxe_pool_entry *arg);
-
int advance_dma_data(struct rxe_dma_info *dma, unsigned int length);
int rxe_invalidate_mr(struct rxe_qp *qp, struct rxe_mr *mr);
+int rxe_mr_check_access(struct rxe_qp *qp, struct rxe_mr *mr,
+ int access, u64 va, u32 resid);
+
+void rxe_mr_cleanup(struct rxe_pool_entry *arg);
+
/* rxe_mw.c */
struct ib_mw *rxe_alloc_mw(struct ib_pd *ibpd, enum ib_mw_type type,
struct ib_udata *udata);
int rxe_dealloc_mw(struct ib_mw *ibmw);
-void rxe_mw_cleanup(struct rxe_pool_entry *arg);
-
int rxe_bind_mw(struct rxe_qp *qp, struct rxe_send_wqe *wqe);
int rxe_invalidate_mw(struct rxe_qp *qp, struct rxe_mw *mw);
+int rxe_mw_check_access(struct rxe_qp *qp, struct rxe_mw *mw,
+ int access, u64 va, u32 resid);
+
+void rxe_mw_cleanup(struct rxe_pool_entry *arg);
+
/* rxe_net.c */
void rxe_loopback(struct sk_buff *skb);
int rxe_send(struct rxe_pkt_info *pkt, struct sk_buff *skb);
diff --git a/drivers/infiniband/sw/rxe/rxe_mr.c b/drivers/infiniband/sw/rxe/rxe_mr.c
index 3f7c9b84f99b..3a7f814f4b81 100644
--- a/drivers/infiniband/sw/rxe/rxe_mr.c
+++ b/drivers/infiniband/sw/rxe/rxe_mr.c
@@ -21,7 +21,7 @@ static void rxe_set_mr_lkey(struct rxe_mr *mr)
goto again;
}
-int mr_check_range(struct rxe_mr *mr, u64 iova, size_t length)
+static int mr_check_range(struct rxe_mr *mr, u64 iova, size_t length)
{
switch (mr->type) {
case RXE_MR_TYPE_DMA:
@@ -380,6 +380,25 @@ int rxe_mr_copy(struct rxe_mr *mr, u64 iova, void *addr, int length,
return err;
}
+static struct rxe_mr *lookup_mr(struct rxe_pd *pd, int access, u32 lkey)
+{
+ struct rxe_mr *mr;
+ struct rxe_dev *rxe = to_rdev(pd->ibpd.device);
+
+ mr = rxe_pool_get_key(&rxe->mr_pool, &lkey);
+ if (!mr)
+ return NULL;
+
+ if (unlikely((mr->ibmr.lkey != lkey) || (mr->pd != pd) ||
+ (access && !(access & mr->access)) ||
+ (mr->state != RXE_MEM_STATE_VALID))) {
+ rxe_drop_ref(mr);
+ return NULL;
+ }
+
+ return mr;
+}
+
/* copy data in or out of a wqe, i.e. sg list
* under the control of a dma descriptor
*/
@@ -409,7 +428,7 @@ int copy_data(
}
if (sge->length && (offset < sge->length)) {
- mr = lookup_mr(pd, access, sge->lkey, lookup_local);
+ mr = lookup_mr(pd, access, sge->lkey);
if (!mr) {
err = -EINVAL;
goto err1;
@@ -434,8 +453,7 @@ int copy_data(
}
if (sge->length) {
- mr = lookup_mr(pd, access, sge->lkey,
- lookup_local);
+ mr = lookup_mr(pd, access, sge->lkey);
if (!mr) {
err = -EINVAL;
goto err1;
@@ -510,34 +528,6 @@ int advance_dma_data(struct rxe_dma_info *dma, unsigned int length)
return 0;
}
-/* (1) find the mr corresponding to lkey/rkey
- * depending on lookup_type
- * (2) verify that the (qp) pd matches the mr pd
- * (3) verify that the mr can support the requested access
- * (4) verify that mr state is valid
- */
-struct rxe_mr *lookup_mr(struct rxe_pd *pd, int access, u32 key,
- enum lookup_type type)
-{
- struct rxe_mr *mr;
- struct rxe_dev *rxe = to_rdev(pd->ibpd.device);
-
- mr = rxe_pool_get_key(&rxe->mr_pool, &key);
- if (!mr)
- return NULL;
-
- if (unlikely((type == lookup_local && mr->lkey != key) ||
- (type == lookup_remote && mr->rkey != key) ||
- mr->pd != pd ||
- (access && !(access & mr->access)) ||
- mr->state != RXE_MEM_STATE_VALID)) {
- rxe_drop_ref(mr);
- mr = NULL;
- }
-
- return mr;
-}
-
int rxe_invalidate_mr(struct rxe_qp *qp, struct rxe_mr *mr)
{
/* TODO there are API rules being ignored here
@@ -548,6 +538,34 @@ int rxe_invalidate_mr(struct rxe_qp *qp, struct rxe_mr *mr)
return 0;
}
+int rxe_mr_check_access(struct rxe_qp *qp, struct rxe_mr *mr,
+ int access, u64 va, u32 resid)
+{
+ int ret;
+ struct rxe_pd *pd = to_rpd(mr->ibmr.pd);
+
+ if (unlikely(mr->state != RXE_MEM_STATE_VALID)) {
+ pr_err("attempt to access a MR that is not in the valid state\n");
+ return -EINVAL;
+ }
+
+ /* C10-56 */
+ if (unlikely(pd != qp->pd)) {
+ pr_err("attempt to access a MR with a different PD than the QP\n");
+ return -EINVAL;
+ }
+
+ /* C10-57 */
+ if (unlikely(access && !(access & mr->access))) {
+ pr_err("attempt to access a MR without required access rights\n");
+ return -EINVAL;
+ }
+
+ ret = mr_check_range(mr, va, resid);
+
+ return ret;
+}
+
void rxe_mr_cleanup(struct rxe_pool_entry *arg)
{
struct rxe_mr *mr = container_of(arg, typeof(*mr), pelem);
diff --git a/drivers/infiniband/sw/rxe/rxe_mw.c b/drivers/infiniband/sw/rxe/rxe_mw.c
index 51bc71c98654..50f3152d3b57 100644
--- a/drivers/infiniband/sw/rxe/rxe_mw.c
+++ b/drivers/infiniband/sw/rxe/rxe_mw.c
@@ -318,11 +318,6 @@ int rxe_bind_mw(struct rxe_qp *qp, struct rxe_send_wqe *wqe)
static int check_invalidate_mw(struct rxe_qp *qp, struct rxe_mw *mw)
{
- if (unlikely(mw->state != RXE_MEM_STATE_VALID)) {
- pr_err_once("attempt to invalidate a MW that is not valid\n");
- return -EINVAL;
- }
-
/* o10-37.2.26 */
if (unlikely(mw->ibmw.type == IB_MW_TYPE_1)) {
pr_err_once("attempt to invalidate a type 1 MW\n");
@@ -336,9 +331,11 @@ static void do_invalidate_mw(struct rxe_mw *mw)
{
mw->qp = NULL;
- rxe_drop_ref(mw->mr);
- atomic_dec(&mw->mr->num_mw);
- mw->mr = NULL;
+ if (mw->mr) {
+ atomic_dec(&mw->mr->num_mw);
+ mw->mr = NULL;
+ rxe_drop_ref(mw->mr);
+ }
mw->access = 0;
mw->addr = 0;
@@ -364,6 +361,50 @@ int rxe_invalidate_mw(struct rxe_qp *qp, struct rxe_mw *mw)
return ret;
}
+int rxe_mw_check_access(struct rxe_qp *qp, struct rxe_mw *mw,
+ int access, u64 va, u32 resid)
+{
+ struct rxe_pd *pd = to_rpd(mw->ibmw.pd);
+
+ if (unlikely(mw->state != RXE_MEM_STATE_VALID)) {
+ pr_err_once("attempt to access a MW that is not valid\n");
+ return -EINVAL;
+ }
+
+ /* C10-76.2.1 */
+ if (unlikely((mw->ibmw.type == IB_MW_TYPE_1) && (pd != qp->pd))) {
+ pr_err_once("attempt to access a type 1 MW with a different PD than the QP\n");
+ return -EINVAL;
+ }
+
+ /* o10-37.2.43 */
+ if (unlikely((mw->ibmw.type == IB_MW_TYPE_2) && (mw->qp != qp))) {
+ pr_err_once("attempt to access a type 2 MW that is associated with a different QP\n");
+ return -EINVAL;
+ }
+
+ /* C10-77 */
+ if (unlikely(access && !(access & mw->access))) {
+ pr_err_once("attempt to access a MW without sufficient access\n");
+ return -EINVAL;
+ }
+
+ if (mw->access & IB_ZERO_BASED) {
+ if (unlikely((va + resid) > mw->length)) {
+ pr_err_once("attempt to access a ZB MW out of bounds\n");
+ return -EINVAL;
+ }
+ } else {
+ if (unlikely((va < mw->addr) ||
+ ((va + resid) > (mw->addr + mw->length)))) {
+ pr_err_once("attempt to access a VA MW out of bounds\n");
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
void rxe_mw_cleanup(struct rxe_pool_entry *arg)
{
struct rxe_mw *mw = container_of(arg, typeof(*mw), pelem);
diff --git a/drivers/infiniband/sw/rxe/rxe_req.c b/drivers/infiniband/sw/rxe/rxe_req.c
index 1944d2bbc43b..e4de0f4a3d69 100644
--- a/drivers/infiniband/sw/rxe/rxe_req.c
+++ b/drivers/infiniband/sw/rxe/rxe_req.c
@@ -645,7 +645,6 @@ int rxe_requester(void *arg)
case IB_WR_BIND_MW:
ret = rxe_bind_mw(qp, wqe);
if (ret) {
- wqe->state = wqe_state_done;
wqe->status = IB_WC_MW_BIND_ERR;
goto err;
}
@@ -653,6 +652,7 @@ int rxe_requester(void *arg)
default:
pr_err_once("unexpected LOCAL WR opcode = %d\n",
wqe->wr.opcode);
+ wqe->status = IB_WC_LOC_QP_OP_ERR;
goto err;
}
@@ -698,13 +698,7 @@ int rxe_requester(void *arg)
payload = (mask & RXE_WRITE_OR_SEND) ? wqe->dma.resid : 0;
if (payload > mtu) {
if (qp_type(qp) == IB_QPT_UD) {
- /* C10-93.1.1: If the total sum of all the buffer lengths specified for a
- * UD message exceeds the MTU of the port as returned by QueryHCA, the CI
- * shall not emit any packets for this message. Further, the CI shall not
- * generate an error due to this condition.
- */
-
- /* fake a successful UD send */
+ /* C10-93.1.1: fake a successful UD send */
wqe->first_psn = qp->req.psn;
wqe->last_psn = qp->req.psn;
qp->req.psn = (qp->req.psn + 1) & BTH_PSN_MASK;
@@ -769,6 +763,8 @@ int rxe_requester(void *arg)
* to be called again
*/
wqe->state = wqe_state_error;
+ qp->req.wqe_index = next_index(qp->sq.queue,
+ qp->req.wqe_index);
__rxe_do_task(&qp->comp.task);
ret = -EAGAIN;
goto done;
@@ -784,8 +780,7 @@ int rxe_requester(void *arg)
again:
/* we come here if we are done with the current wqe but want to
- * get called again. Mostly we loop back to next wqe so should
- * be all one way or the other
+ * get called again.
*/
ret = 0;
goto done;
diff --git a/drivers/infiniband/sw/rxe/rxe_resp.c b/drivers/infiniband/sw/rxe/rxe_resp.c
index 4d688a50d301..91595c23bc16 100644
--- a/drivers/infiniband/sw/rxe/rxe_resp.c
+++ b/drivers/infiniband/sw/rxe/rxe_resp.c
@@ -393,6 +393,8 @@ static enum resp_states check_rkey(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
struct rxe_mr *mr = NULL;
+ struct rxe_mw *mw = NULL;
+ struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
u64 va;
u32 rkey;
u32 resid;
@@ -400,6 +402,7 @@ static enum resp_states check_rkey(struct rxe_qp *qp,
int mtu = qp->mtu;
enum resp_states state;
int access;
+ unsigned long flags;
if (pkt->mask & (RXE_READ_MASK | RXE_WRITE_MASK)) {
if (pkt->mask & RXE_RETH_MASK) {
@@ -407,6 +410,7 @@ static enum resp_states check_rkey(struct rxe_qp *qp,
qp->resp.rkey = reth_rkey(pkt);
qp->resp.resid = reth_len(pkt);
qp->resp.length = reth_len(pkt);
+ qp->resp.offset = 0;
}
access = (pkt->mask & RXE_READ_MASK) ? IB_ACCESS_REMOTE_READ
: IB_ACCESS_REMOTE_WRITE;
@@ -414,6 +418,7 @@ static enum resp_states check_rkey(struct rxe_qp *qp,
qp->resp.va = atmeth_va(pkt);
qp->resp.rkey = atmeth_rkey(pkt);
qp->resp.resid = sizeof(u64);
+ qp->resp.offset = 0;
access = IB_ACCESS_REMOTE_ATOMIC;
} else {
return RESPST_EXECUTE;
@@ -431,20 +436,46 @@ static enum resp_states check_rkey(struct rxe_qp *qp,
resid = qp->resp.resid;
pktlen = payload_size(pkt);
- mr = lookup_mr(qp->pd, access, rkey, lookup_remote);
- if (!mr) {
- state = RESPST_ERR_RKEY_VIOLATION;
- goto err;
- }
+ /* check rkey on each packet because someone could
+ * have invalidated, deallocated or unregistered it
+ * since the last packet
+ */
+ if (rkey & IS_MW) {
+ mw = rxe_pool_get_key(&rxe->mw_pool, &rkey);
+ if (!mw) {
+ pr_err_once("no MW found with rkey = 0x%08x\n", rkey);
+ state = RESPST_ERR_RKEY_VIOLATION;
+ goto err;
+ }
- if (unlikely(mr->state == RXE_MEM_STATE_FREE)) {
- state = RESPST_ERR_RKEY_VIOLATION;
- goto err;
- }
+ spin_lock_irqsave(&mw->lock, flags);
+ if (rxe_mw_check_access(qp, mw, access, va, resid)) {
+ spin_unlock_irqrestore(&mw->lock, flags);
+ rxe_drop_ref(mw);
+ state = RESPST_ERR_RKEY_VIOLATION;
+ goto err;
+ }
- if (mr_check_range(mr, va, resid)) {
- state = RESPST_ERR_RKEY_VIOLATION;
- goto err;
+ mr = mw->mr;
+ rxe_add_ref(mr);
+
+ if (mw->access & IB_ZERO_BASED)
+ qp->resp.offset = mw->addr;
+
+ spin_unlock_irqrestore(&mw->lock, flags);
+ rxe_drop_ref(mw);
+ } else {
+ mr = rxe_pool_get_key(&rxe->mr_pool, &rkey);
+ if (!mr || (mr->rkey != rkey)) {
+ pr_err_once("no MR found with rkey = 0x%08x\n", rkey);
+ state = RESPST_ERR_RKEY_VIOLATION;
+ goto err;
+ }
+
+ if (rxe_mr_check_access(qp, mr, access, va, resid)) {
+ state = RESPST_ERR_RKEY_VIOLATION;
+ goto err;
+ }
}
if (pkt->mask & RXE_WRITE_MASK) {
@@ -500,8 +531,8 @@ static enum resp_states write_data_in(struct rxe_qp *qp,
int err;
int data_len = payload_size(pkt);
- err = rxe_mr_copy(qp->resp.mr, qp->resp.va, payload_addr(pkt),
- data_len, to_mr_obj, NULL);
+ err = rxe_mr_copy(qp->resp.mr, qp->resp.va + qp->resp.offset,
+ payload_addr(pkt), data_len, to_mr_obj, NULL);
if (err) {
rc = RESPST_ERR_RKEY_VIOLATION;
goto out;
@@ -520,7 +551,6 @@ static DEFINE_SPINLOCK(atomic_ops_lock);
static enum resp_states process_atomic(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
- u64 iova = atmeth_va(pkt);
u64 *vaddr;
enum resp_states ret;
struct rxe_mr *mr = qp->resp.mr;
@@ -530,7 +560,7 @@ static enum resp_states process_atomic(struct rxe_qp *qp,
goto out;
}
- vaddr = iova_to_vaddr(mr, iova, sizeof(u64));
+ vaddr = iova_to_vaddr(mr, qp->resp.va + qp->resp.offset, sizeof(u64));
/* check vaddr is 8 bytes aligned. */
if (!vaddr || (uintptr_t)vaddr & 7) {
@@ -655,8 +685,10 @@ static enum resp_states read_reply(struct rxe_qp *qp,
res->type = RXE_READ_MASK;
res->replay = 0;
- res->read.va = qp->resp.va;
- res->read.va_org = qp->resp.va;
+ res->read.va = qp->resp.va +
+ qp->resp.offset;
+ res->read.va_org = qp->resp.va +
+ qp->resp.offset;
res->first_psn = req_pkt->psn;
@@ -1336,7 +1368,10 @@ int rxe_responder(void *arg)
/* Class C */
do_class_ac_error(qp, AETH_NAK_REM_ACC_ERR,
IB_WC_REM_ACCESS_ERR);
- state = RESPST_COMPLETE;
+ if (qp->resp.wqe)
+ state = RESPST_COMPLETE;
+ else
+ state = RESPST_ACKNOWLEDGE;
} else {
qp->resp.drop_msg = 1;
if (qp->srq) {
@@ -1364,7 +1399,10 @@ int rxe_responder(void *arg)
/* Class C */
do_class_ac_error(qp, AETH_NAK_INVALID_REQ,
IB_WC_REM_INV_REQ_ERR);
- state = RESPST_COMPLETE;
+ if (qp->resp.wqe)
+ state = RESPST_COMPLETE;
+ else
+ state = RESPST_ACKNOWLEDGE;
} else if (qp->srq) {
/* UC/UD - class E */
qp->resp.status = IB_WC_REM_INV_REQ_ERR;
@@ -1380,7 +1418,10 @@ int rxe_responder(void *arg)
/* All, Class A. */
do_class_ac_error(qp, AETH_NAK_REM_OP_ERR,
IB_WC_LOC_QP_OP_ERR);
- state = RESPST_COMPLETE;
+ if (qp->resp.wqe)
+ state = RESPST_COMPLETE;
+ else
+ state = RESPST_ACKNOWLEDGE;
break;
case RESPST_ERR_CQ_OVERFLOW:
diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.h b/drivers/infiniband/sw/rxe/rxe_verbs.h
index 2fb5581edd8a..b24a9a0878c2 100644
--- a/drivers/infiniband/sw/rxe/rxe_verbs.h
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.h
@@ -183,6 +183,7 @@ struct rxe_resp_info {
/* RDMA read / atomic only */
u64 va;
+ u64 offset;
struct rxe_mr *mr;
u32 resid;
u32 rkey;
--
2.25.1
