struct ib_recv_wr **bad_wr)
{
struct ipath_srq *srq = to_isrq(ibsrq);
- struct ipath_ibdev *dev = to_idev(ibsrq->device);
+ struct ipath_rwq *wq;
unsigned long flags;
int ret;
for (; wr; wr = wr->next) {
struct ipath_rwqe *wqe;
u32 next;
- int i, j;
+ int i;
- if (wr->num_sge > srq->rq.max_sge) {
+ if ((unsigned) wr->num_sge > srq->rq.max_sge) {
*bad_wr = wr;
ret = -ENOMEM;
goto bail;
}
spin_lock_irqsave(&srq->rq.lock, flags);
- next = srq->rq.head + 1;
+ wq = srq->rq.wq;
+ next = wq->head + 1;
if (next >= srq->rq.size)
next = 0;
- if (next == srq->rq.tail) {
+ if (next == wq->tail) {
spin_unlock_irqrestore(&srq->rq.lock, flags);
*bad_wr = wr;
ret = -ENOMEM;
goto bail;
}
- wqe = get_rwqe_ptr(&srq->rq, srq->rq.head);
+ wqe = get_rwqe_ptr(&srq->rq, wq->head);
wqe->wr_id = wr->wr_id;
- wqe->sg_list[0].mr = NULL;
- wqe->sg_list[0].vaddr = NULL;
- wqe->sg_list[0].length = 0;
- wqe->sg_list[0].sge_length = 0;
- wqe->length = 0;
- for (i = 0, j = 0; i < wr->num_sge; i++) {
- /* Check LKEY */
- if (to_ipd(srq->ibsrq.pd)->user &&
- wr->sg_list[i].lkey == 0) {
- spin_unlock_irqrestore(&srq->rq.lock,
- flags);
- *bad_wr = wr;
- ret = -EINVAL;
- goto bail;
- }
- if (wr->sg_list[i].length == 0)
- continue;
- if (!ipath_lkey_ok(&dev->lk_table,
- &wqe->sg_list[j],
- &wr->sg_list[i],
- IB_ACCESS_LOCAL_WRITE)) {
- spin_unlock_irqrestore(&srq->rq.lock,
- flags);
- *bad_wr = wr;
- ret = -EINVAL;
- goto bail;
- }
- wqe->length += wr->sg_list[i].length;
- j++;
- }
- wqe->num_sge = j;
- srq->rq.head = next;
+ wqe->num_sge = wr->num_sge;
+ for (i = 0; i < wr->num_sge; i++)
+ wqe->sg_list[i] = wr->sg_list[i];
+ wq->head = next;
spin_unlock_irqrestore(&srq->rq.lock, flags);
}
ret = 0;
if (dev->n_srqs_allocated == ib_ipath_max_srqs) {
ret = ERR_PTR(-ENOMEM);
- goto bail;
+ goto done;
}
if (srq_init_attr->attr.max_wr == 0) {
ret = ERR_PTR(-EINVAL);
- goto bail;
+ goto done;
}
if ((srq_init_attr->attr.max_sge > ib_ipath_max_srq_sges) ||
(srq_init_attr->attr.max_wr > ib_ipath_max_srq_wrs)) {
ret = ERR_PTR(-EINVAL);
- goto bail;
+ goto done;
}
srq = kmalloc(sizeof(*srq), GFP_KERNEL);
if (!srq) {
ret = ERR_PTR(-ENOMEM);
- goto bail;
+ goto done;
}
/*
* Need to use vmalloc() if we want to support large #s of entries.
*/
srq->rq.size = srq_init_attr->attr.max_wr + 1;
- sz = sizeof(struct ipath_sge) * srq_init_attr->attr.max_sge +
+ srq->rq.max_sge = srq_init_attr->attr.max_sge;
+ sz = sizeof(struct ib_sge) * srq->rq.max_sge +
sizeof(struct ipath_rwqe);
- srq->rq.wq = vmalloc(srq->rq.size * sz);
+ srq->rq.wq = vmalloc_user(sizeof(struct ipath_rwq) + srq->rq.size * sz);
if (!srq->rq.wq) {
- kfree(srq);
ret = ERR_PTR(-ENOMEM);
- goto bail;
+ goto bail_srq;
}
+ /*
+ * Return the address of the RWQ as the offset to mmap.
+ * See ipath_mmap() for details.
+ */
+ if (udata && udata->outlen >= sizeof(__u64)) {
+ struct ipath_mmap_info *ip;
+ __u64 offset = (__u64) srq->rq.wq;
+ int err;
+
+ err = ib_copy_to_udata(udata, &offset, sizeof(offset));
+ if (err) {
+ ret = ERR_PTR(err);
+ goto bail_wq;
+ }
+
+ /* Allocate info for ipath_mmap(). */
+ ip = kmalloc(sizeof(*ip), GFP_KERNEL);
+ if (!ip) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail_wq;
+ }
+ srq->ip = ip;
+ ip->context = ibpd->uobject->context;
+ ip->obj = srq->rq.wq;
+ kref_init(&ip->ref);
+ ip->mmap_cnt = 0;
+ ip->size = PAGE_ALIGN(sizeof(struct ipath_rwq) +
+ srq->rq.size * sz);
+ spin_lock_irq(&dev->pending_lock);
+ ip->next = dev->pending_mmaps;
+ dev->pending_mmaps = ip;
+ spin_unlock_irq(&dev->pending_lock);
+ } else
+ srq->ip = NULL;
+
/*
* ib_create_srq() will initialize srq->ibsrq.
*/
spin_lock_init(&srq->rq.lock);
- srq->rq.head = 0;
- srq->rq.tail = 0;
+ srq->rq.wq->head = 0;
+ srq->rq.wq->tail = 0;
srq->rq.max_sge = srq_init_attr->attr.max_sge;
srq->limit = srq_init_attr->attr.srq_limit;
+ dev->n_srqs_allocated++;
+
ret = &srq->ibsrq;
+ goto done;
- dev->n_srqs_allocated++;
+bail_wq:
+ vfree(srq->rq.wq);
-bail:
+bail_srq:
+ kfree(srq);
+
+done:
return ret;
}
* @ibsrq: the SRQ to modify
* @attr: the new attributes of the SRQ
* @attr_mask: indicates which attributes to modify
+ * @udata: user data for ipathverbs.so
*/
int ipath_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
- enum ib_srq_attr_mask attr_mask)
+ enum ib_srq_attr_mask attr_mask,
+ struct ib_udata *udata)
{
struct ipath_srq *srq = to_isrq(ibsrq);
- unsigned long flags;
- int ret;
+ int ret = 0;
- if (attr_mask & IB_SRQ_MAX_WR)
- if ((attr->max_wr > ib_ipath_max_srq_wrs) ||
- (attr->max_sge > srq->rq.max_sge)) {
- ret = -EINVAL;
- goto bail;
- }
+ if (attr_mask & IB_SRQ_MAX_WR) {
+ struct ipath_rwq *owq;
+ struct ipath_rwq *wq;
+ struct ipath_rwqe *p;
+ u32 sz, size, n, head, tail;
- if (attr_mask & IB_SRQ_LIMIT)
- if (attr->srq_limit >= srq->rq.size) {
+ /* Check that the requested sizes are below the limits. */
+ if ((attr->max_wr > ib_ipath_max_srq_wrs) ||
+ ((attr_mask & IB_SRQ_LIMIT) ?
+ attr->srq_limit : srq->limit) > attr->max_wr) {
ret = -EINVAL;
goto bail;
}
- if (attr_mask & IB_SRQ_MAX_WR) {
- struct ipath_rwqe *wq, *p;
- u32 sz, size, n;
-
sz = sizeof(struct ipath_rwqe) +
- attr->max_sge * sizeof(struct ipath_sge);
+ srq->rq.max_sge * sizeof(struct ib_sge);
size = attr->max_wr + 1;
- wq = vmalloc(size * sz);
+ wq = vmalloc_user(sizeof(struct ipath_rwq) + size * sz);
if (!wq) {
ret = -ENOMEM;
goto bail;
}
- spin_lock_irqsave(&srq->rq.lock, flags);
- if (srq->rq.head < srq->rq.tail)
- n = srq->rq.size + srq->rq.head - srq->rq.tail;
+ /*
+ * Return the address of the RWQ as the offset to mmap.
+ * See ipath_mmap() for details.
+ */
+ if (udata && udata->inlen >= sizeof(__u64)) {
+ __u64 offset_addr;
+ __u64 offset = (__u64) wq;
+
+ ret = ib_copy_from_udata(&offset_addr, udata,
+ sizeof(offset_addr));
+ if (ret) {
+ vfree(wq);
+ goto bail;
+ }
+ udata->outbuf = (void __user *) offset_addr;
+ ret = ib_copy_to_udata(udata, &offset,
+ sizeof(offset));
+ if (ret) {
+ vfree(wq);
+ goto bail;
+ }
+ }
+
+ spin_lock_irq(&srq->rq.lock);
+ /*
+ * validate head pointer value and compute
+ * the number of remaining WQEs.
+ */
+ owq = srq->rq.wq;
+ head = owq->head;
+ if (head >= srq->rq.size)
+ head = 0;
+ tail = owq->tail;
+ if (tail >= srq->rq.size)
+ tail = 0;
+ n = head;
+ if (n < tail)
+ n += srq->rq.size - tail;
else
- n = srq->rq.head - srq->rq.tail;
- if (size <= n || size <= srq->limit) {
- spin_unlock_irqrestore(&srq->rq.lock, flags);
+ n -= tail;
+ if (size <= n) {
+ spin_unlock_irq(&srq->rq.lock);
vfree(wq);
ret = -EINVAL;
goto bail;
}
n = 0;
- p = wq;
- while (srq->rq.tail != srq->rq.head) {
+ p = wq->wq;
+ while (tail != head) {
struct ipath_rwqe *wqe;
int i;
- wqe = get_rwqe_ptr(&srq->rq, srq->rq.tail);
+ wqe = get_rwqe_ptr(&srq->rq, tail);
p->wr_id = wqe->wr_id;
- p->length = wqe->length;
p->num_sge = wqe->num_sge;
for (i = 0; i < wqe->num_sge; i++)
p->sg_list[i] = wqe->sg_list[i];
n++;
p = (struct ipath_rwqe *)((char *) p + sz);
- if (++srq->rq.tail >= srq->rq.size)
- srq->rq.tail = 0;
+ if (++tail >= srq->rq.size)
+ tail = 0;
}
- vfree(srq->rq.wq);
srq->rq.wq = wq;
srq->rq.size = size;
- srq->rq.head = n;
- srq->rq.tail = 0;
- srq->rq.max_sge = attr->max_sge;
- spin_unlock_irqrestore(&srq->rq.lock, flags);
- }
-
- if (attr_mask & IB_SRQ_LIMIT) {
- spin_lock_irqsave(&srq->rq.lock, flags);
- srq->limit = attr->srq_limit;
- spin_unlock_irqrestore(&srq->rq.lock, flags);
+ wq->head = n;
+ wq->tail = 0;
+ if (attr_mask & IB_SRQ_LIMIT)
+ srq->limit = attr->srq_limit;
+ spin_unlock_irq(&srq->rq.lock);
+
+ vfree(owq);
+
+ if (srq->ip) {
+ struct ipath_mmap_info *ip = srq->ip;
+ struct ipath_ibdev *dev = to_idev(srq->ibsrq.device);
+
+ ip->obj = wq;
+ ip->size = PAGE_ALIGN(sizeof(struct ipath_rwq) +
+ size * sz);
+ spin_lock_irq(&dev->pending_lock);
+ ip->next = dev->pending_mmaps;
+ dev->pending_mmaps = ip;
+ spin_unlock_irq(&dev->pending_lock);
+ }
+ } else if (attr_mask & IB_SRQ_LIMIT) {
+ spin_lock_irq(&srq->rq.lock);
+ if (attr->srq_limit >= srq->rq.size)
+ ret = -EINVAL;
+ else
+ srq->limit = attr->srq_limit;
+ spin_unlock_irq(&srq->rq.lock);
}
- ret = 0;
bail:
return ret;
git.openpandora.org / pandora-kernel.git / blobdiff