1 files changed, 180 insertions, 2 deletions

diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 5f2bbcda4c73..ebccf9f38af9 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -724,6 +724,7 @@ ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
         struct ib_uobject              *uobj;
         struct ib_pd                   *pd;
         struct ib_cq                   *scq, *rcq;
+        struct ib_srq                  *srq;
         struct ib_qp                   *qp;
         struct ib_qp_init_attr          attr;
         int ret;
@@ -747,10 +748,12 @@ ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
         pd  = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
         scq = idr_find(&ib_uverbs_cq_idr, cmd.send_cq_handle);
         rcq = idr_find(&ib_uverbs_cq_idr, cmd.recv_cq_handle);
+        srq = cmd.is_srq ? idr_find(&ib_uverbs_srq_idr, cmd.srq_handle) : NULL;
 
         if (!pd  || pd->uobject->context  != file->ucontext ||
             !scq || scq->uobject->context != file->ucontext ||
-            !rcq || rcq->uobject->context != file->ucontext) {
+            !rcq || rcq->uobject->context != file->ucontext ||
+            (cmd.is_srq && (!srq || srq->uobject->context != file->ucontext))) {
                 ret = -EINVAL;
                 goto err_up;
         }
@@ -759,7 +762,7 @@ ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
         attr.qp_context    = file;
         attr.send_cq       = scq;
         attr.recv_cq       = rcq;
-        attr.srq           = NULL;
+        attr.srq           = srq;
         attr.sq_sig_type   = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
         attr.qp_type       = cmd.qp_type;
 
@@ -1004,3 +1007,178 @@ ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
 
         return ret ? ret : in_len;
 }
+
+ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
+                             const char __user *buf, int in_len,
+                             int out_len)
+{
+        struct ib_uverbs_create_srq      cmd;
+        struct ib_uverbs_create_srq_resp resp;
+        struct ib_udata                  udata;
+        struct ib_uobject               *uobj;
+        struct ib_pd                    *pd;
+        struct ib_srq                   *srq;
+        struct ib_srq_init_attr          attr;
+        int ret;
+
+        if (out_len < sizeof resp)
+                return -ENOSPC;
+
+        if (copy_from_user(&cmd, buf, sizeof cmd))
+                return -EFAULT;
+
+        INIT_UDATA(&udata, buf + sizeof cmd,
+                   (unsigned long) cmd.response + sizeof resp,
+                   in_len - sizeof cmd, out_len - sizeof resp);
+
+        uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
+        if (!uobj)
+                return -ENOMEM;
+
+        down(&ib_uverbs_idr_mutex);
+
+        pd  = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
+
+        if (!pd || pd->uobject->context != file->ucontext) {
+                ret = -EINVAL;
+                goto err_up;
+        }
+
+        attr.event_handler  = ib_uverbs_srq_event_handler;
+        attr.srq_context    = file;
+        attr.attr.max_wr    = cmd.max_wr;
+        attr.attr.max_sge   = cmd.max_sge;
+        attr.attr.srq_limit = cmd.srq_limit;
+
+        uobj->user_handle = cmd.user_handle;
+        uobj->context     = file->ucontext;
+
+        srq = pd->device->create_srq(pd, &attr, &udata);
+        if (IS_ERR(srq)) {
+                ret = PTR_ERR(srq);
+                goto err_up;
+        }
+
+        srq->device        = pd->device;
+        srq->pd            = pd;
+        srq->uobject       = uobj;
+        srq->event_handler = attr.event_handler;
+        srq->srq_context   = attr.srq_context;
+        atomic_inc(&pd->usecnt);
+        atomic_set(&srq->usecnt, 0);
+
+        memset(&resp, 0, sizeof resp);
+
+retry:
+        if (!idr_pre_get(&ib_uverbs_srq_idr, GFP_KERNEL)) {
+                ret = -ENOMEM;
+                goto err_destroy;
+        }
+
+        ret = idr_get_new(&ib_uverbs_srq_idr, srq, &uobj->id);
+
+        if (ret == -EAGAIN)
+                goto retry;
+        if (ret)
+                goto err_destroy;
+
+        resp.srq_handle = uobj->id;
+
+        spin_lock_irq(&file->ucontext->lock);
+        list_add_tail(&uobj->list, &file->ucontext->srq_list);
+        spin_unlock_irq(&file->ucontext->lock);
+
+        if (copy_to_user((void __user *) (unsigned long) cmd.response,
+                         &resp, sizeof resp)) {
+                ret = -EFAULT;
+                goto err_list;
+        }
+
+        up(&ib_uverbs_idr_mutex);
+
+        return in_len;
+
+err_list:
+        spin_lock_irq(&file->ucontext->lock);
+        list_del(&uobj->list);
+        spin_unlock_irq(&file->ucontext->lock);
+
+err_destroy:
+        ib_destroy_srq(srq);
+
+err_up:
+        up(&ib_uverbs_idr_mutex);
+
+        kfree(uobj);
+        return ret;
+}
+
+ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
+                             const char __user *buf, int in_len,
+                             int out_len)
+{
+        struct ib_uverbs_modify_srq cmd;
+        struct ib_srq              *srq;
+        struct ib_srq_attr          attr;
+        int                         ret;
+
+        if (copy_from_user(&cmd, buf, sizeof cmd))
+                return -EFAULT;
+
+        down(&ib_uverbs_idr_mutex);
+
+        srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
+        if (!srq || srq->uobject->context != file->ucontext) {
+                ret = -EINVAL;
+                goto out;
+        }
+
+        attr.max_wr    = cmd.max_wr;
+        attr.max_sge   = cmd.max_sge;
+        attr.srq_limit = cmd.srq_limit;
+
+        ret = ib_modify_srq(srq, &attr, cmd.attr_mask);
+
+out:
+        up(&ib_uverbs_idr_mutex);
+
+        return ret ? ret : in_len;
+}
+
+ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
+                              const char __user *buf, int in_len,
+                              int out_len)
+{
+        struct ib_uverbs_destroy_srq cmd;
+        struct ib_srq               *srq;
+        struct ib_uobject           *uobj;
+        int                          ret = -EINVAL;
+
+        if (copy_from_user(&cmd, buf, sizeof cmd))
+                return -EFAULT;
+
+        down(&ib_uverbs_idr_mutex);
+
+        srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
+        if (!srq || srq->uobject->context != file->ucontext)
+                goto out;
+
+        uobj = srq->uobject;
+
+        ret = ib_destroy_srq(srq);
+        if (ret)
+                goto out;
+
+        idr_remove(&ib_uverbs_srq_idr, cmd.srq_handle);
+
+        spin_lock_irq(&file->ucontext->lock);
+        list_del(&uobj->list);
+        spin_unlock_irq(&file->ucontext->lock);
+
+        kfree(uobj);
+
+out:
+        up(&ib_uverbs_idr_mutex);
+
+        return ret ? ret : in_len;
+}