On 9/22/20 9:25 PM, Zhu Yanjun wrote:
> On 9/22/2020 4:03 AM, Bob Pearson wrote:
>> - Add code to implement ibv_bind_mw (for type 1 MWs) and
>> post send queue bind_mw (for type 2 MWs).
>> - Add code to implement local (post send) and remote
>> (send with invalidate) invalidate operations.
>> - Add rules checking for MW operations from IBA.
>>
>> Signed-off-by: Bob Pearson <rpearson@xxxxxxx>
>> ---
>> drivers/infiniband/sw/rxe/rxe_comp.c | 1 +
>> drivers/infiniband/sw/rxe/rxe_loc.h | 6 +
>> drivers/infiniband/sw/rxe/rxe_mr.c | 13 +-
>> drivers/infiniband/sw/rxe/rxe_mw.c | 289 ++++++++++++++++++++++++-
>> drivers/infiniband/sw/rxe/rxe_opcode.c | 11 +-
>> drivers/infiniband/sw/rxe/rxe_opcode.h | 1 -
>> drivers/infiniband/sw/rxe/rxe_req.c | 126 ++++++++---
>> drivers/infiniband/sw/rxe/rxe_resp.c | 81 +++++--
>> drivers/infiniband/sw/rxe/rxe_verbs.c | 2 +-
>> drivers/infiniband/sw/rxe/rxe_verbs.h | 7 +
>> include/uapi/rdma/rdma_user_rxe.h | 34 ++-
>> 11 files changed, 508 insertions(+), 63 deletions(-)
>>
>> diff --git a/drivers/infiniband/sw/rxe/rxe_comp.c b/drivers/infiniband/sw/rxe/rxe_comp.c
>> index 5dc86c9e74c2..8b81d3b24a8a 100644
>> --- a/drivers/infiniband/sw/rxe/rxe_comp.c
>> +++ b/drivers/infiniband/sw/rxe/rxe_comp.c
>> @@ -103,6 +103,7 @@ static enum ib_wc_opcode wr_to_wc_opcode(enum ib_wr_opcode opcode)
>> case IB_WR_RDMA_READ_WITH_INV: return IB_WC_RDMA_READ;
>> case IB_WR_LOCAL_INV: return IB_WC_LOCAL_INV;
>> case IB_WR_REG_MR: return IB_WC_REG_MR;
>> + case IB_WR_BIND_MW: return IB_WC_BIND_MW;
>> default:
>> return 0xff;
>> diff --git a/drivers/infiniband/sw/rxe/rxe_loc.h b/drivers/infiniband/sw/rxe/rxe_loc.h
>> index 65f2e4a94956..1ee6270d3f2a 100644
>> --- a/drivers/infiniband/sw/rxe/rxe_loc.h
>> +++ b/drivers/infiniband/sw/rxe/rxe_loc.h
>> @@ -109,6 +109,8 @@ 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);
>> +
>> /* rxe_mw.c */
>> struct ib_mw *rxe_alloc_mw(struct ib_pd *ibpd, enum ib_mw_type type,
>> struct ib_udata *udata);
>> @@ -117,6 +119,10 @@ 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);
>> +
>> /* 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 4c53badfa4e9..3f7c9b84f99b 100644
>> --- a/drivers/infiniband/sw/rxe/rxe_mr.c
>> +++ b/drivers/infiniband/sw/rxe/rxe_mr.c
>> @@ -538,12 +538,23 @@ struct rxe_mr *lookup_mr(struct rxe_pd *pd, int access, u32 key,
>> return mr;
>> }
>> +int rxe_invalidate_mr(struct rxe_qp *qp, struct rxe_mr *mr)
>> +{
>
> In this function, where is the qp used?
>
>> + /* TODO there are API rules being ignored here
>> + * cleanup later. Current project is not trying
>> + * to fix MR
>> + */
>> + mr->state = RXE_MEM_STATE_FREE;
>
> This function always returns 0
>
>
>> + return 0;
>> +}
>> +
>> void rxe_mr_cleanup(struct rxe_pool_entry *arg)
>> {
>> struct rxe_mr *mr = container_of(arg, typeof(*mr), pelem);
>> int i;
>> - ib_umem_release(mr->umem);
>> + if (mr->umem)
>> + ib_umem_release(mr->umem);
>> if (mr->map) {
>> for (i = 0; i < mr->num_map; i++)
>> diff --git a/drivers/infiniband/sw/rxe/rxe_mw.c b/drivers/infiniband/sw/rxe/rxe_mw.c
>> index b818f1e869da..51bc71c98654 100644
>> --- a/drivers/infiniband/sw/rxe/rxe_mw.c
>> +++ b/drivers/infiniband/sw/rxe/rxe_mw.c
>> @@ -30,7 +30,7 @@ struct ib_mw *rxe_alloc_mw(struct ib_pd *ibpd, enum ib_mw_type type,
>> struct rxe_alloc_mw_resp __user *uresp = NULL;
>> if (udata) {
>> - if (udata->outlen < sizeof(*uresp))
>> + if (unlikely(udata->outlen < sizeof(*uresp)))
>> return ERR_PTR(-EINVAL);
>> uresp = udata->outbuf;
>> }
>> @@ -62,10 +62,9 @@ struct ib_mw *rxe_alloc_mw(struct ib_pd *ibpd, enum ib_mw_type type,
>> RXE_MEM_STATE_VALID;
>> if (uresp) {
>> - if (copy_to_user(&uresp->index, &mw->pelem.index,
>> - sizeof(uresp->index))) {
>> + if (unlikely(copy_to_user(&uresp->index, &mw->pelem.index,
>> + sizeof(uresp->index)))) {
>> rxe_drop_ref(mw);
>> - rxe_drop_ref(pd);
>> return ERR_PTR(-EFAULT);
>> }
>> }
>> @@ -73,22 +72,298 @@ struct ib_mw *rxe_alloc_mw(struct ib_pd *ibpd, enum ib_mw_type type,
>> return &mw->ibmw;
>> }
>> +/* cleanup mw in case someone is still holding a ref */
>> +static void do_dealloc_mw(struct rxe_mw *mw)
>> +{
>> + if (mw->mr) {
>> + rxe_drop_ref(mw->mr);
>> + atomic_dec(&mw->mr->num_mw);
>> + mw->mr = NULL;
>> + }
>> +
>> + mw->qp = NULL;
>> + mw->access = 0;
>> + mw->addr = 0;
>> + mw->length = 0;
>> + mw->state = RXE_MEM_STATE_INVALID;
>> +}
>> +
>> int rxe_dealloc_mw(struct ib_mw *ibmw)
>> {
>> struct rxe_mw *mw = to_rmw(ibmw);
>> - struct rxe_pd *pd = to_rpd(ibmw->pd);
>> unsigned long flags;
>> spin_lock_irqsave(&mw->lock, flags);
>> - mw->state = RXE_MEM_STATE_INVALID;
>> +
>> + do_dealloc_mw(mw);
>> +
>> + spin_unlock_irqrestore(&mw->lock, flags);
>> +
>> + rxe_drop_ref(mw);
>> +
>> + return 0;
>> +}
>> +
>> +/* Check the rules for bind MW oepration. */
>> +static int check_bind_mw(struct rxe_qp *qp, struct rxe_send_wqe *wqe,
>> + struct rxe_mw *mw, struct rxe_mr *mr)
>> +{
>> + /* check to see if bind operation came through
>> + * ibv_bind_mw verbs API.
>> + */
>> + switch (mw->ibmw.type) {
>> + case IB_MW_TYPE_1:
>> + /* o10-37.2.34 */
>> + if (unlikely(!(wqe->wr.wr.umw.flags & RXE_BIND_MW))) {
>> + pr_err_once("attempt to bind type 1 MW with send WR\n");
>> + return -EINVAL;
>> + }
>> + break;
>> + case IB_MW_TYPE_2:
>> + /* o10-37.2.35 */
>> + if (unlikely(wqe->wr.wr.umw.flags & RXE_BIND_MW)) {
>> + pr_err_once("attempt to bind type 2 MW with verbs API\n");
>> + return -EINVAL;
>> + }
>> +
>> + /* C10-72 */
>> + if (unlikely(qp->pd != to_rpd(mw->ibmw.pd))) {
>> + pr_err_once("attempt to bind type 2 MW with qp with different PD\n");
>> + return -EINVAL;
>> + }
>> +
>> + /* o10-37.2.40 */
>> + if (unlikely(wqe->wr.wr.umw.length == 0)) {
>> + pr_err_once("attempt to invalidate type 2 MW by binding with zero length\n");
>> + return -EINVAL;
>> + }
>> +
>> + if (unlikely(!mr)) {
>> + pr_err_once("attempt to bind MW to a NULL mr\n");
>> + return -EINVAL;
>> + }
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + if (unlikely((mw->ibmw.type == IB_MW_TYPE_1) &&
>> + (mw->state != RXE_MEM_STATE_VALID))) {
>> + pr_err_once("attempt to bind a type 1 MW not in the valid state\n");
>> + return -EINVAL;
>> + }
>> +
>> + /* o10-36.2.2 */
>> + if (unlikely((mw->access & IB_ZERO_BASED) &&
>> + (mw->ibmw.type == IB_MW_TYPE_1))) {
>> + pr_err_once("attempt to bind a zero based type 1 MW\n");
>> + return -EINVAL;
>> + }
>> +
>> + if (unlikely((wqe->wr.wr.umw.rkey & 0xff) == (mw->ibmw.rkey & 0xff))) {
>> + pr_err_once("attempt to bind MW with same key\n");
>> + return -EINVAL;
>> + }
>> +
>> + /* remaining checks only apply to a nonzero MR */
>> + if (!mr)
>> + return 0;
>> +
>> + if (unlikely(mr->access & IB_ZERO_BASED)) {
>> + pr_err_once("attempt to bind MW to zero based MR\n");
>> + return -EINVAL;
>> + }
>> +
>> + /* o10-37.2.30 */
>> + if (unlikely((mw->ibmw.type == IB_MW_TYPE_2) &&
>> + (mw->state != RXE_MEM_STATE_FREE))) {
>> + pr_err_once("attempt to bind a type 2 MW not in the free state\n");
>> + return -EINVAL;
>> + }
>> +
>> + /* C10-73 */
>> + if (unlikely(!(mr->access & IB_ACCESS_MW_BIND))) {
>> + pr_err_once("attempt to bind an MW to an MR without bind access\n");
>> + return -EINVAL;
>> + }
>> +
>> + /* C10-74 */
>> + if (unlikely((mw->access & (IB_ACCESS_REMOTE_WRITE |
>> + IB_ACCESS_REMOTE_ATOMIC)) &&
>> + !(mr->access & IB_ACCESS_LOCAL_WRITE))) {
>> + pr_err_once("attempt to bind an writeable MW to an MR without local write access\n");
>> + return -EINVAL;
>> + }
>> +
>> + /* C10-75 */
>> + if (mw->access & IB_ZERO_BASED) {
>> + if (unlikely(wqe->wr.wr.umw.length > mr->length)) {
>> + pr_err_once("attempt to bind a ZB MW outside of the MR\n");
>> + return -EINVAL;
>> + }
>> + } else {
>> + if (unlikely((wqe->wr.wr.umw.addr < mr->iova) ||
>> + ((wqe->wr.wr.umw.addr + wqe->wr.wr.umw.length) >
>> + (mr->iova + mr->length)))) {
>> + pr_err_once("attempt to bind a VA MW outside of the MR\n");
>> + return -EINVAL;
>> + }
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int do_bind_mw(struct rxe_qp *qp, struct rxe_send_wqe *wqe,
>> + struct rxe_mw *mw, struct rxe_mr *mr)
>> +{
>> + u32 rkey;
>> + u32 new_rkey;
>> + struct rxe_mw *duplicate_mw;
>> + struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
>> +
>> + /* key part of new rkey is provided by user for type 2
>> + * and ibv_bind_mw() for type 1 MWs
>> + * there is a very rare chance that the new rkey will
>> + * collide with an existing MW. Return an error if this
>> + * occurs
>> + */
>> + rkey = mw->ibmw.rkey;
>> + new_rkey = (rkey & 0xffffff00) | (wqe->wr.wr.umw.rkey & 0x000000ff);
>> + duplicate_mw = rxe_pool_get_key(&rxe->mw_pool, &new_rkey);
>> + if (duplicate_mw) {
>> + pr_err_once("new MW key is a duplicate, try another\n");
>> + rxe_drop_ref(duplicate_mw);
>> + return -EINVAL;
>> + }
>> +
>> + rxe_drop_key(mw);
>> + rxe_add_key(mw, &new_rkey);
>> +
>> + mw->access = wqe->wr.wr.umw.access;
>> + mw->state = RXE_MEM_STATE_VALID;
>> + mw->addr = wqe->wr.wr.umw.addr;
>> + mw->length = wqe->wr.wr.umw.length;
>> +
>> + if (mw->mr) {
>> + rxe_drop_ref(mw->mr);
>> + atomic_dec(&mw->mr->num_mw);
>> + mw->mr = NULL;
>> + }
>> +
>> + if (mw->length) {
>> + mw->mr = mr;
>> + atomic_inc(&mr->num_mw);
>> + rxe_add_ref(mr);
>> + }
>> +
>> + if (mw->ibmw.type == IB_MW_TYPE_2)
>> + mw->qp = qp;
>> +
>> + return 0;
>> +}
>> +
>> +int rxe_bind_mw(struct rxe_qp *qp, struct rxe_send_wqe *wqe)
>> +{
>> + int ret;
>> + struct rxe_mw *mw;
>> + struct rxe_mr *mr;
>> + struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
>> + unsigned long flags;
>> +
>> + if (qp->is_user) {
>> + mw = rxe_pool_get_index(&rxe->mw_pool,
>> + wqe->wr.wr.umw.mw_index);
>> + if (!mw) {
>> + pr_err_once("mw with index = %d not found\n",
>> + wqe->wr.wr.umw.mw_index);
>> + ret = -EINVAL;
>> + goto err1;
>> + }
>> + mr = rxe_pool_get_index(&rxe->mr_pool,
>> + wqe->wr.wr.umw.mr_index);
>> + if (!mr && wqe->wr.wr.umw.length) {
>> + pr_err_once("mr with index = %d not found\n",
>> + wqe->wr.wr.umw.mr_index);
>> + ret = -EINVAL;
>> + goto err2;
>> + }
>> + } else {
>> + mw = to_rmw(wqe->wr.wr.kmw.mw);
>> + rxe_add_ref(mw);
>> + if (wqe->wr.wr.kmw.mr) {
>> + mr = to_rmr(wqe->wr.wr.kmw.mr);
>> + rxe_add_ref(mr);
>> + } else {
>> + mr = NULL;
>> + }
>> + }
>> +
>> + spin_lock_irqsave(&mw->lock, flags);
>> +
>> + ret = check_bind_mw(qp, wqe, mw, mr);
>> + if (ret)
>> + goto err3;
>> +
>> + ret = do_bind_mw(qp, wqe, mw, mr);
>> +err3:
>> spin_unlock_irqrestore(&mw->lock, flags);
>> - rxe_drop_ref(pd);
>> + if (mr)
>> + rxe_drop_ref(mr);
>> +err2:
>> rxe_drop_ref(mw);
>> +err1:
>> + return ret;
>> +}
>> +
>> +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");
>> + return -EINVAL;
>> + }
>> return 0;
>> }
>> +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;
>> +
>> + mw->access = 0;
>> + mw->addr = 0;
>> + mw->length = 0;
>> + mw->state = RXE_MEM_STATE_FREE;
>> +}
>> +
>> +int rxe_invalidate_mw(struct rxe_qp *qp, struct rxe_mw *mw)
>> +{
>> + int ret;
>> + unsigned long flags;
>> +
>> + spin_lock_irqsave(&mw->lock, flags);
>> +
>> + ret = check_invalidate_mw(qp, mw);
>> + if (ret)
>> + goto err;
>> +
>> + do_invalidate_mw(mw);
>> +err:
>> + spin_unlock_irqrestore(&mw->lock, flags);
>> +
>> + return ret;
>> +}
>> +
>> 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_opcode.c b/drivers/infiniband/sw/rxe/rxe_opcode.c
>> index 0cb4b01fd910..5532f01ae5a3 100644
>> --- a/drivers/infiniband/sw/rxe/rxe_opcode.c
>> +++ b/drivers/infiniband/sw/rxe/rxe_opcode.c
>> @@ -87,13 +87,20 @@ struct rxe_wr_opcode_info rxe_wr_opcode_info[] = {
>> [IB_WR_LOCAL_INV] = {
>> .name = "IB_WR_LOCAL_INV",
>> .mask = {
>> - [IB_QPT_RC] = WR_REG_MASK,
>> + [IB_QPT_RC] = WR_LOCAL_MASK,
>> },
>> },
>> [IB_WR_REG_MR] = {
>> .name = "IB_WR_REG_MR",
>> .mask = {
>> - [IB_QPT_RC] = WR_REG_MASK,
>> + [IB_QPT_RC] = WR_LOCAL_MASK,
>> + },
>> + },
>> + [IB_WR_BIND_MW] = {
>> + .name = "IB_WR_BIND_MW",
>> + .mask = {
>> + [IB_QPT_RC] = WR_LOCAL_MASK,
>> + [IB_QPT_UC] = WR_LOCAL_MASK,
>> },
>> },
>> };
>> diff --git a/drivers/infiniband/sw/rxe/rxe_opcode.h b/drivers/infiniband/sw/rxe/rxe_opcode.h
>> index 1041ac9a9233..440e34f446bd 100644
>> --- a/drivers/infiniband/sw/rxe/rxe_opcode.h
>> +++ b/drivers/infiniband/sw/rxe/rxe_opcode.h
>> @@ -20,7 +20,6 @@ enum rxe_wr_mask {
>> WR_READ_MASK = BIT(3),
>> WR_WRITE_MASK = BIT(4),
>> WR_LOCAL_MASK = BIT(5),
>> - WR_REG_MASK = BIT(6),
>> WR_READ_OR_WRITE_MASK = WR_READ_MASK | WR_WRITE_MASK,
>> WR_READ_WRITE_OR_SEND_MASK = WR_READ_OR_WRITE_MASK | WR_SEND_MASK,
>> diff --git a/drivers/infiniband/sw/rxe/rxe_req.c b/drivers/infiniband/sw/rxe/rxe_req.c
>> index 682f30bb3495..1944d2bbc43b 100644
>> --- a/drivers/infiniband/sw/rxe/rxe_req.c
>> +++ b/drivers/infiniband/sw/rxe/rxe_req.c
>> @@ -524,9 +524,9 @@ static void save_state(struct rxe_send_wqe *wqe,
>> struct rxe_send_wqe *rollback_wqe,
>> u32 *rollback_psn)
>> {
>> - rollback_wqe->state = wqe->state;
>> + rollback_wqe->state = wqe->state;
>> rollback_wqe->first_psn = wqe->first_psn;
>> - rollback_wqe->last_psn = wqe->last_psn;
>> + rollback_wqe->last_psn = wqe->last_psn;
>> *rollback_psn = qp->req.psn;
>> }
>> @@ -556,9 +556,38 @@ static void update_state(struct rxe_qp *qp, struct rxe_send_wqe *wqe,
>> jiffies + qp->qp_timeout_jiffies);
>> }
>> +static int invalidate_key(struct rxe_qp *qp, u32 key)
>> +{
>> + int ret;
>> + struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
>> + struct rxe_mw *mw;
>> + struct rxe_mr *mr;
>> +
>> + if (key & IS_MW) {
>> + mw = rxe_pool_get_key(&rxe->mw_pool, &key);
>> + if (!mw) {
>> + pr_err("No mw for key %#x\n", key);
>> + return -EINVAL;
>> + }
>> + ret = rxe_invalidate_mw(qp, mw);
>> + rxe_drop_ref(mw);
>> + } else {
>> + mr = rxe_pool_get_key(&rxe->mr_pool, &key);
>> + if (!mr) {
>> + pr_err("No mr for key %#x\n", key);
>> + return -EINVAL;
>> + }
>> + ret = rxe_invalidate_mr(qp, mr);
>
>
> here, is ret necessary? is qp necessary?
>
>
>> + rxe_drop_ref(mr);
>> + }
>> +
>> + return ret;
>> +}
>> +
>> int rxe_requester(void *arg)
>> {
>> struct rxe_qp *qp = (struct rxe_qp *)arg;
>> + struct rxe_mr *mr;
>> struct rxe_pkt_info pkt;
>> struct sk_buff *skb;
>> struct rxe_send_wqe *wqe;
>> @@ -569,6 +598,7 @@ int rxe_requester(void *arg)
>> int ret;
>> struct rxe_send_wqe rollback_wqe;
>> u32 rollback_psn;
>> + u32 key;
>> rxe_add_ref(qp);
>> @@ -594,42 +624,47 @@ int rxe_requester(void *arg)
>> if (unlikely(!wqe))
>> goto exit;
>> - if (wqe->mask & WR_REG_MASK) {
>> - if (wqe->wr.opcode == IB_WR_LOCAL_INV) {
>> - struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
>> - struct rxe_mr *mr;
>> -
>> - mr = rxe_pool_get_key(&rxe->mr_pool,
>> - &wqe->wr.ex.invalidate_rkey);
>> - if (!mr) {
>> - pr_err("No mr for key %#x\n",
>> - wqe->wr.ex.invalidate_rkey);
>> - wqe->state = wqe_state_error;
>> - wqe->status = IB_WC_MW_BIND_ERR;
>> - goto exit;
>> + if (wqe->mask & WR_LOCAL_MASK) {
>> + switch (wqe->wr.opcode) {
>> + case IB_WR_LOCAL_INV:
>> + key = wqe->wr.ex.invalidate_rkey;
>> + ret = invalidate_key(qp, key);
>> + if (ret) {
>> + wqe->status = IB_WC_LOC_QP_OP_ERR;
>> + goto err;
>> }
>> - mr->state = RXE_MEM_STATE_FREE;
>> - rxe_drop_ref(mr);
>> - wqe->state = wqe_state_done;
>> - wqe->status = IB_WC_SUCCESS;
>> - } else if (wqe->wr.opcode == IB_WR_REG_MR) {
>> - struct rxe_mr *mr = to_rmr(wqe->wr.wr.reg.mr);
>> -
>> + break;
>> + case IB_WR_REG_MR:
>> + mr = to_rmr(wqe->wr.wr.reg.mr);
>> mr->state = RXE_MEM_STATE_VALID;
>> mr->access = wqe->wr.wr.reg.access;
>> mr->lkey = wqe->wr.wr.reg.key;
>> mr->rkey = wqe->wr.wr.reg.key;
>> mr->iova = wqe->wr.wr.reg.mr->iova;
>> - wqe->state = wqe_state_done;
>> - wqe->status = IB_WC_SUCCESS;
>> - } else {
>> - goto exit;
>> + break;
>> + 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;
>> + }
>> + break;
>> + default:
>> + pr_err_once("unexpected LOCAL WR opcode = %d\n",
>> + wqe->wr.opcode);
>> + goto err;
>> }
>> +
>> + wqe->state = wqe_state_done;
>> + wqe->status = IB_WC_SUCCESS;
>> + qp->req.wqe_index = next_index(qp->sq.queue,
>> + qp->req.wqe_index);
>> +
>> if ((wqe->wr.send_flags & IB_SEND_SIGNALED) ||
>> qp->sq_sig_type == IB_SIGNAL_ALL_WR)
>> rxe_run_task(&qp->comp.task, 1);
>> - qp->req.wqe_index = next_index(qp->sq.queue,
>> - qp->req.wqe_index);
>> +
>> goto next_wqe;
>> }
>> @@ -649,6 +684,7 @@ int rxe_requester(void *arg)
>> opcode = next_opcode(qp, wqe, wqe->wr.opcode);
>> if (unlikely(opcode < 0)) {
>> wqe->status = IB_WC_LOC_QP_OP_ERR;
>> + /* TODO this should be goto err */
>> goto exit;
>> }
>> @@ -678,8 +714,7 @@ int rxe_requester(void *arg)
>> wqe->state = wqe_state_done;
>> wqe->status = IB_WC_SUCCESS;
>> __rxe_do_task(&qp->comp.task);
>> - rxe_drop_ref(qp);
>> - return 0;
>> + goto again;
>> }
>> payload = mtu;
>> }
>> @@ -687,12 +722,14 @@ int rxe_requester(void *arg)
>> skb = init_req_packet(qp, wqe, opcode, payload, &pkt);
>> if (unlikely(!skb)) {
>> pr_err("qp#%d Failed allocating skb\n", qp_num(qp));
>> + wqe->status = IB_WC_LOC_PROT_ERR;
>> goto err;
>> }
>> if (fill_packet(qp, wqe, &pkt, skb, payload)) {
>> pr_debug("qp#%d Error during fill packet\n", qp_num(qp));
>> kfree_skb(skb);
>> + wqe->status = IB_WC_LOC_PROT_ERR;
>> goto err;
>> }
>> @@ -716,6 +753,7 @@ int rxe_requester(void *arg)
>> goto exit;
>> }
>> + wqe->status = IB_WC_LOC_PROT_ERR;
>> goto err;
>> }
>> @@ -724,11 +762,35 @@ int rxe_requester(void *arg)
>> goto next_wqe;
>> err:
>> - wqe->status = IB_WC_LOC_PROT_ERR;
>> + /* we come here if an error occurred while processing
>> + * a send wqe. The completer will put the qp in error
>> + * state and no more wqes will be processed unless
>> + * the qp is cleaned up and restarted. We do not want
>> + * to be called again
>> + */
>> wqe->state = wqe_state_error;
>> __rxe_do_task(&qp->comp.task);
>> + ret = -EAGAIN;
>> + goto done;
>> exit:
>> + /* we come here if either there are no more wqes in the send
>> + * queue or we are blocked waiting for some resource or event.
>> + * The current wqe will be restarted or new wqe started when
>> + * there is work to do or we can complete the current wqe.
>> + */
>> + ret = -EAGAIN;
>> + goto done;
>> +
>> +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
>> + */
>> + ret = 0;
>> + goto done;
>> +
>> +done:
>> rxe_drop_ref(qp);
>> - return -EAGAIN;
>> + return ret;
>> }
>> diff --git a/drivers/infiniband/sw/rxe/rxe_resp.c b/drivers/infiniband/sw/rxe/rxe_resp.c
>> index 885b5bf6dc2e..4d688a50d301 100644
>> --- a/drivers/infiniband/sw/rxe/rxe_resp.c
>> +++ b/drivers/infiniband/sw/rxe/rxe_resp.c
>> @@ -35,6 +35,7 @@ enum resp_states {
>> RESPST_ERR_TOO_MANY_RDMA_ATM_REQ,
>> RESPST_ERR_RNR,
>> RESPST_ERR_RKEY_VIOLATION,
>> + RESPST_ERR_INVALIDATE_RKEY,
>> RESPST_ERR_LENGTH,
>> RESPST_ERR_CQ_OVERFLOW,
>> RESPST_ERROR,
>> @@ -68,6 +69,7 @@ static char *resp_state_name[] = {
>> [RESPST_ERR_TOO_MANY_RDMA_ATM_REQ] = "ERR_TOO_MANY_RDMA_ATM_REQ",
>> [RESPST_ERR_RNR] = "ERR_RNR",
>> [RESPST_ERR_RKEY_VIOLATION] = "ERR_RKEY_VIOLATION",
>> + [RESPST_ERR_INVALIDATE_RKEY] = "ERR_INVALIDATE_RKEY_VIOLATION",
>> [RESPST_ERR_LENGTH] = "ERR_LENGTH",
>> [RESPST_ERR_CQ_OVERFLOW] = "ERR_CQ_OVERFLOW",
>> [RESPST_ERROR] = "ERROR",
>> @@ -751,6 +753,39 @@ static void build_rdma_network_hdr(union rdma_network_hdr *hdr,
>> memcpy(&hdr->ibgrh, ipv6_hdr(skb), sizeof(hdr->ibgrh));
>> }
>> +static int invalidate_rkey(struct rxe_qp *qp, u32 rkey)
>> +{
>> + int ret;
>> + struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
>> + struct rxe_mw *mw;
>> + struct rxe_mr *mr;
>> +
>> + if (rkey & IS_MW) {
>> + mw = rxe_pool_get_key(&rxe->mw_pool, &rkey);
>> + if (!mw) {
>> + pr_err("No mw for rkey %#x\n", rkey);
>> + goto err;
>> + }
>> + ret = rxe_invalidate_mw(qp, mw);
>> + rxe_drop_ref(mw);
>> + } else {
>> + mr = rxe_pool_get_key(&rxe->mr_pool, &rkey);
>> + if (!mr || mr->ibmr.rkey != rkey) {
>> + pr_err("No mr for rkey %#x\n", rkey);
>> + goto err;
>> + }
>> + ret = rxe_invalidate_mr(qp, mr);
>
> here
>
>
>> + rxe_drop_ref(mr);
>> + }
>> +
>> + if (ret)
>> + goto err;
>> +
>> + return 0;
>> +err:
>> + return RESPST_ERR_INVALIDATE_RKEY;
>> +}
>> +
>> /* Executes a new request. A retried request never reach that function (send
>> * and writes are discarded, and reads and atomics are retried elsewhere.
>> */
>> @@ -790,6 +825,14 @@ static enum resp_states execute(struct rxe_qp *qp, struct rxe_pkt_info *pkt)
>> WARN_ON_ONCE(1);
>> }
>> + if (pkt->mask & RXE_IETH_MASK) {
>> + u32 rkey = ieth_rkey(pkt);
>> +
>> + err = invalidate_rkey(qp, rkey);
>> + if (err)
>> + return err;
>> + }
>> +
>> /* next expected psn, read handles this separately */
>> qp->resp.psn = (pkt->psn + 1) & BTH_PSN_MASK;
>> qp->resp.ack_psn = qp->resp.psn;
>> @@ -822,15 +865,20 @@ static enum resp_states do_complete(struct rxe_qp *qp,
>> memset(&cqe, 0, sizeof(cqe));
>> if (qp->rcq->is_user) {
>> - uwc->status = qp->resp.status;
>> - uwc->qp_num = qp->ibqp.qp_num;
>> - uwc->wr_id = wqe->wr_id;
>> + uwc->status = qp->resp.status;
>> + uwc->qp_num = qp->ibqp.qp_num;
>> + uwc->wr_id = wqe->wr_id;
>> } else {
>> - wc->status = qp->resp.status;
>> - wc->qp = &qp->ibqp;
>> - wc->wr_id = wqe->wr_id;
>> + wc->status = qp->resp.status;
>> + wc->qp = &qp->ibqp;
>> + wc->wr_id = wqe->wr_id;
>> }
>> + /* TODO nothing is returned for error WQEs but
>> + * at least some of these have important things
>> + * to report (for example send with invalidate but
>> + * rkey fails) Fix this when I clean up MR logic
>> + */
>> if (wc->status == IB_WC_SUCCESS) {
>> rxe_counter_inc(rxe, RXE_CNT_RDMA_RECV);
>> wc->opcode = (pkt->mask & RXE_IMMDT_MASK &&
>> @@ -883,20 +931,8 @@ static enum resp_states do_complete(struct rxe_qp *qp,
>> }
>> if (pkt->mask & RXE_IETH_MASK) {
>> - struct rxe_mr *rmr;
>> -
>> wc->wc_flags |= IB_WC_WITH_INVALIDATE;
>> wc->ex.invalidate_rkey = ieth_rkey(pkt);
>> -
>> - rmr = rxe_pool_get_key(&rxe->mr_pool,
>> - &wc->ex.invalidate_rkey);
>> - if (unlikely(!rmr)) {
>> - pr_err("Bad rkey %#x invalidation\n",
>> - wc->ex.invalidate_rkey);
>> - return RESPST_ERROR;
>> - }
>> - rmr->state = RXE_MEM_STATE_FREE;
>> - rxe_drop_ref(rmr);
>> }
>> wc->qp = &qp->ibqp;
>> @@ -1314,6 +1350,15 @@ int rxe_responder(void *arg)
>> }
>> break;
>> + case RESPST_ERR_INVALIDATE_RKEY:
>> + /* RC Only - Class C. */
>> + /* Class J */
>> + qp->resp.goto_error = 1;
>> + /* is there a better choice */
>> + qp->resp.status = IB_WC_REM_INV_REQ_ERR;
>> + state = RESPST_COMPLETE;
>> + break;
>> +
>> case RESPST_ERR_LENGTH:
>> if (qp_type(qp) == IB_QPT_RC) {
>> /* Class C */
>> diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
>> index 96fea64ba02d..21582507ed32 100644
>> --- a/drivers/infiniband/sw/rxe/rxe_verbs.c
>> +++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
>> @@ -577,7 +577,7 @@ static int init_send_wqe(struct rxe_qp *qp, const struct ib_send_wr *ibwr,
>> p += sge->length;
>> }
>> - } else if (mask & WR_REG_MASK) {
>> + } else if (mask & WR_LOCAL_MASK) {
>> wqe->mask = mask;
>> wqe->state = wqe_state_posted;
>> return 0;
>> diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.h b/drivers/infiniband/sw/rxe/rxe_verbs.h
>> index 2233630fea7f..2fb5581edd8a 100644
>> --- a/drivers/infiniband/sw/rxe/rxe_verbs.h
>> +++ b/drivers/infiniband/sw/rxe/rxe_verbs.h
>> @@ -316,9 +316,16 @@ struct rxe_mr {
>> u32 max_buf;
>> u32 num_map;
>> + atomic_t num_mw;
>> +
>> struct rxe_map **map;
>> };
>> +enum rxe_send_flags {
>> + /* flag indicaes bind call came through verbs API */
>> + RXE_BIND_MW = (1 << 0),
>> +};
>> +
>> /* use high order bit to separate MW and MR rkeys */
>> #define IS_MW (1 << 31)
>> diff --git a/include/uapi/rdma/rdma_user_rxe.h b/include/uapi/rdma/rdma_user_rxe.h
>> index 4ad0fa0b2ab9..d49125682359 100644
>> --- a/include/uapi/rdma/rdma_user_rxe.h
>> +++ b/include/uapi/rdma/rdma_user_rxe.h
>> @@ -93,7 +93,39 @@ struct rxe_send_wr {
>> __u32 remote_qkey;
>> __u16 pkey_index;
>> } ud;
>> - /* reg is only used by the kernel and is not part of the uapi */
>> + struct {
>> + __aligned_u64 addr;
>> + __aligned_u64 length;
>> + union {
>> + __u32 mr_index;
>> + __aligned_u64 reserved1;
>> + };
>> + union {
>> + __u32 mw_index;
>> + __aligned_u64 reserved2;
>> + };
>> + __u32 rkey;
>> + __u32 access;
>> + __u32 flags;
>> + } umw;
>> + /* The following are only used by the kernel
>> + * and are not part of the uapi
>> + */
>> + struct {
>> + __aligned_u64 addr;
>> + __aligned_u64 length;
>> + union {
>> + struct ib_mr *mr;
>> + __aligned_u64 reserved1;
>> + };
>> + union {
>> + struct ib_mw *mw;
>> + __aligned_u64 reserved2;
>> + };
>> + __u32 rkey;
>> + __u32 access;
>> + __u32 flags;
>> + } kmw;
>> struct {
>> union {
>> struct ib_mr *mr;
>
>
Currently there are a bunch of places where the mr code is weak in checking the rules.
Because the focus of this project was to implement memory windows and not fix all the mr
issues I made minimal functional changes to the mr code. In this particular case
I just set the mr state to free as before these patches. However, I am working now on cleaning
up and extending the mr implementation and I expect this to require both qp and a return value since
the invalidate_mr code can absolutely fail.
Bob
