int c4iw_destroy_cq(struct ib_cq *ib_cq)
{
struct c4iw_cq *chp;
struct c4iw_ucontext *ucontext;
PDBG("%s ib_cq %p\n", __func__, ib_cq);
chp = to_c4iw_cq(ib_cq);
remove_handle(chp->rhp, &chp->rhp->cqidr, chp->cq.cqid);
atomic_dec(&chp->refcnt);
wait_event(chp->wait, !atomic_read(&chp->refcnt));
ucontext = ib_cq->uobject ? to_c4iw_ucontext(ib_cq->uobject->context)
: NULL;
destroy_cq(&chp->rhp->rdev, &chp->cq,
ucontext ? &ucontext->uctx : &chp->cq.rdev->uctx);
kfree(chp);
return 0;
}
int c4iw_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
{
struct c4iw_cq *chp;
struct c4iw_ucontext *ucontext;
pr_debug("ib_cq %p\n", ib_cq);
chp = to_c4iw_cq(ib_cq);
xa_erase_irq(&chp->rhp->cqs, chp->cq.cqid);
atomic_dec(&chp->refcnt);
wait_event(chp->wait, !atomic_read(&chp->refcnt));
ucontext = rdma_udata_to_drv_context(udata, struct c4iw_ucontext,
ibucontext);
destroy_cq(&chp->rhp->rdev, &chp->cq,
ucontext ? &ucontext->uctx : &chp->cq.rdev->uctx,
chp->destroy_skb, chp->wr_waitp);
c4iw_put_wr_wait(chp->wr_waitp);
kfree(chp);
return 0;
}
int c4iw_destroy_cq(struct ib_cq *ib_cq)
{
struct c4iw_cq *chp;
struct c4iw_ucontext *ucontext;
pr_debug("ib_cq %p\n", ib_cq);
chp = to_c4iw_cq(ib_cq);
remove_handle(chp->rhp, &chp->rhp->cqidr, chp->cq.cqid);
atomic_dec(&chp->refcnt);
wait_event(chp->wait, !atomic_read(&chp->refcnt));
ucontext = ib_cq->uobject ? to_c4iw_ucontext(ib_cq->uobject->context)
: NULL;
destroy_cq(&chp->rhp->rdev, &chp->cq,
ucontext ? &ucontext->uctx : &chp->cq.rdev->uctx,
chp->destroy_skb, chp->wr_waitp);
c4iw_put_wr_wait(chp->wr_waitp);
kfree(chp);
return 0;
}
struct ib_cq *c4iw_create_cq(struct ib_device *ibdev, int entries,
int vector, struct ib_ucontext *ib_context,
struct ib_udata *udata)
{
struct c4iw_dev *rhp;
struct c4iw_cq *chp;
struct c4iw_create_cq_resp uresp;
struct c4iw_ucontext *ucontext = NULL;
int ret;
size_t memsize, hwentries;
struct c4iw_mm_entry *mm, *mm2;
PDBG("%s ib_dev %p entries %d\n", __func__, ibdev, entries);
rhp = to_c4iw_dev(ibdev);
chp = kzalloc(sizeof(*chp), GFP_KERNEL);
if (!chp)
return ERR_PTR(-ENOMEM);
if (ib_context)
ucontext = to_c4iw_ucontext(ib_context);
/* account for the status page. */
entries++;
/* IQ needs one extra entry to differentiate full vs empty. */
entries++;
/*
* entries must be multiple of 16 for HW.
*/
entries = roundup(entries, 16);
/*
* Make actual HW queue 2x to avoid cdix_inc overflows.
*/
hwentries = entries * 2;
/*
* Make HW queue at least 64 entries so GTS updates aren't too
* frequent.
*/
if (hwentries < 64)
hwentries = 64;
memsize = hwentries * sizeof *chp->cq.queue;
/*
* memsize must be a multiple of the page size if its a user cq.
*/
if (ucontext) {
memsize = roundup(memsize, PAGE_SIZE);
hwentries = memsize / sizeof *chp->cq.queue;
}
chp->cq.size = hwentries;
chp->cq.memsize = memsize;
ret = create_cq(&rhp->rdev, &chp->cq,
ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
if (ret)
goto err1;
chp->rhp = rhp;
chp->cq.size--; /* status page */
chp->ibcq.cqe = entries - 2;
spin_lock_init(&chp->lock);
atomic_set(&chp->refcnt, 1);
init_waitqueue_head(&chp->wait);
ret = insert_handle(rhp, &rhp->cqidr, chp, chp->cq.cqid);
if (ret)
goto err2;
if (ucontext) {
mm = kmalloc(sizeof *mm, GFP_KERNEL);
if (!mm)
goto err3;
mm2 = kmalloc(sizeof *mm2, GFP_KERNEL);
if (!mm2)
goto err4;
uresp.qid_mask = rhp->rdev.cqmask;
uresp.cqid = chp->cq.cqid;
uresp.size = chp->cq.size;
uresp.memsize = chp->cq.memsize;
spin_lock(&ucontext->mmap_lock);
uresp.key = ucontext->key;
ucontext->key += PAGE_SIZE;
uresp.gts_key = ucontext->key;
ucontext->key += PAGE_SIZE;
spin_unlock(&ucontext->mmap_lock);
ret = ib_copy_to_udata(udata, &uresp, sizeof uresp);
if (ret)
goto err5;
mm->key = uresp.key;
mm->addr = virt_to_phys(chp->cq.queue);
mm->len = chp->cq.memsize;
insert_mmap(ucontext, mm);
mm2->key = uresp.gts_key;
mm2->addr = chp->cq.ugts;
mm2->len = PAGE_SIZE;
insert_mmap(ucontext, mm2);
}
PDBG("%s cqid 0x%0x chp %p size %u memsize %zu, dma_addr 0x%0llx\n",
__func__, chp->cq.cqid, chp, chp->cq.size,
chp->cq.memsize,
(unsigned long long) chp->cq.dma_addr);
return &chp->ibcq;
err5:
kfree(mm2);
err4:
kfree(mm);
err3:
remove_handle(rhp, &rhp->cqidr, chp->cq.cqid);
err2:
destroy_cq(&chp->rhp->rdev, &chp->cq,
ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
err1:
kfree(chp);
return ERR_PTR(ret);
}
struct ib_cq *c4iw_create_cq(struct ib_device *ibdev,
const struct ib_cq_init_attr *attr,
struct ib_udata *udata)
{
int entries = attr->cqe;
int vector = attr->comp_vector;
struct c4iw_dev *rhp;
struct c4iw_cq *chp;
struct c4iw_create_cq ucmd;
struct c4iw_create_cq_resp uresp;
int ret, wr_len;
size_t memsize, hwentries;
struct c4iw_mm_entry *mm, *mm2;
struct c4iw_ucontext *ucontext = rdma_udata_to_drv_context(
udata, struct c4iw_ucontext, ibucontext);
pr_debug("ib_dev %p entries %d\n", ibdev, entries);
if (attr->flags)
return ERR_PTR(-EINVAL);
rhp = to_c4iw_dev(ibdev);
if (vector >= rhp->rdev.lldi.nciq)
return ERR_PTR(-EINVAL);
if (udata) {
if (udata->inlen < sizeof(ucmd))
ucontext->is_32b_cqe = 1;
}
chp = kzalloc(sizeof(*chp), GFP_KERNEL);
if (!chp)
return ERR_PTR(-ENOMEM);
chp->wr_waitp = c4iw_alloc_wr_wait(GFP_KERNEL);
if (!chp->wr_waitp) {
ret = -ENOMEM;
goto err_free_chp;
}
c4iw_init_wr_wait(chp->wr_waitp);
wr_len = sizeof(struct fw_ri_res_wr) + sizeof(struct fw_ri_res);
chp->destroy_skb = alloc_skb(wr_len, GFP_KERNEL);
if (!chp->destroy_skb) {
ret = -ENOMEM;
goto err_free_wr_wait;
}
/* account for the status page. */
entries++;
/* IQ needs one extra entry to differentiate full vs empty. */
entries++;
/*
* entries must be multiple of 16 for HW.
*/
entries = roundup(entries, 16);
/*
* Make actual HW queue 2x to avoid cdix_inc overflows.
*/
hwentries = min(entries * 2, rhp->rdev.hw_queue.t4_max_iq_size);
/*
* Make HW queue at least 64 entries so GTS updates aren't too
* frequent.
*/
if (hwentries < 64)
hwentries = 64;
memsize = hwentries * ((ucontext && ucontext->is_32b_cqe) ?
(sizeof(*chp->cq.queue) / 2) : sizeof(*chp->cq.queue));
/*
* memsize must be a multiple of the page size if its a user cq.
*/
if (udata)
memsize = roundup(memsize, PAGE_SIZE);
chp->cq.size = hwentries;
chp->cq.memsize = memsize;
chp->cq.vector = vector;
ret = create_cq(&rhp->rdev, &chp->cq,
ucontext ? &ucontext->uctx : &rhp->rdev.uctx,
chp->wr_waitp);
if (ret)
goto err_free_skb;
chp->rhp = rhp;
chp->cq.size--; /* status page */
chp->ibcq.cqe = entries - 2;
spin_lock_init(&chp->lock);
spin_lock_init(&chp->comp_handler_lock);
atomic_set(&chp->refcnt, 1);
init_waitqueue_head(&chp->wait);
ret = xa_insert_irq(&rhp->cqs, chp->cq.cqid, chp, GFP_KERNEL);
if (ret)
goto err_destroy_cq;
if (ucontext) {
ret = -ENOMEM;
mm = kmalloc(sizeof *mm, GFP_KERNEL);
if (!mm)
goto err_remove_handle;
mm2 = kmalloc(sizeof *mm2, GFP_KERNEL);
if (!mm2)
goto err_free_mm;
memset(&uresp, 0, sizeof(uresp));
uresp.qid_mask = rhp->rdev.cqmask;
uresp.cqid = chp->cq.cqid;
uresp.size = chp->cq.size;
uresp.memsize = chp->cq.memsize;
spin_lock(&ucontext->mmap_lock);
uresp.key = ucontext->key;
ucontext->key += PAGE_SIZE;
uresp.gts_key = ucontext->key;
ucontext->key += PAGE_SIZE;
/* communicate to the userspace that
* kernel driver supports 64B CQE
*/
uresp.flags |= C4IW_64B_CQE;
spin_unlock(&ucontext->mmap_lock);
ret = ib_copy_to_udata(udata, &uresp,
ucontext->is_32b_cqe ?
sizeof(uresp) - sizeof(uresp.flags) :
sizeof(uresp));
if (ret)
goto err_free_mm2;
mm->key = uresp.key;
mm->addr = virt_to_phys(chp->cq.queue);
mm->len = chp->cq.memsize;
insert_mmap(ucontext, mm);
mm2->key = uresp.gts_key;
mm2->addr = chp->cq.bar2_pa;
mm2->len = PAGE_SIZE;
insert_mmap(ucontext, mm2);
}
pr_debug("cqid 0x%0x chp %p size %u memsize %zu, dma_addr 0x%0llx\n",
chp->cq.cqid, chp, chp->cq.size,
chp->cq.memsize, (unsigned long long)chp->cq.dma_addr);
return &chp->ibcq;
err_free_mm2:
kfree(mm2);
err_free_mm:
kfree(mm);
err_remove_handle:
xa_erase_irq(&rhp->cqs, chp->cq.cqid);
err_destroy_cq:
destroy_cq(&chp->rhp->rdev, &chp->cq,
ucontext ? &ucontext->uctx : &rhp->rdev.uctx,
chp->destroy_skb, chp->wr_waitp);
err_free_skb:
kfree_skb(chp->destroy_skb);
err_free_wr_wait:
c4iw_put_wr_wait(chp->wr_waitp);
err_free_chp:
kfree(chp);
return ERR_PTR(ret);
}
struct ib_cq *c4iw_create_cq(struct ib_device *ibdev, int entries,
int vector, struct ib_ucontext *ib_context,
struct ib_udata *udata)
{
struct c4iw_dev *rhp;
struct c4iw_cq *chp;
struct c4iw_create_cq_resp uresp;
struct c4iw_ucontext *ucontext = NULL;
int ret;
size_t memsize, hwentries;
struct c4iw_mm_entry *mm, *mm2;
PDBG("%s ib_dev %p entries %d\n", __func__, ibdev, entries);
rhp = to_c4iw_dev(ibdev);
chp = kzalloc(sizeof(*chp), GFP_KERNEL);
if (!chp)
return ERR_PTR(-ENOMEM);
if (ib_context)
ucontext = to_c4iw_ucontext(ib_context);
/* */
entries++;
/* */
entries++;
/*
*/
entries = roundup(entries, 16);
/*
*/
hwentries = entries * 2;
/*
*/
if (hwentries < 64)
hwentries = 64;
memsize = hwentries * sizeof *chp->cq.queue;
/*
*/
if (ucontext) {
memsize = roundup(memsize, PAGE_SIZE);
hwentries = memsize / sizeof *chp->cq.queue;
while (hwentries > T4_MAX_IQ_SIZE) {
memsize -= PAGE_SIZE;
hwentries = memsize / sizeof *chp->cq.queue;
}
}
chp->cq.size = hwentries;
chp->cq.memsize = memsize;
ret = create_cq(&rhp->rdev, &chp->cq,
ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
if (ret)
goto err1;
chp->rhp = rhp;
chp->cq.size--; /* */
chp->ibcq.cqe = entries - 2;
spin_lock_init(&chp->lock);
spin_lock_init(&chp->comp_handler_lock);
atomic_set(&chp->refcnt, 1);
init_waitqueue_head(&chp->wait);
ret = insert_handle(rhp, &rhp->cqidr, chp, chp->cq.cqid);
if (ret)
goto err2;
if (ucontext) {
mm = kmalloc(sizeof *mm, GFP_KERNEL);
if (!mm)
goto err3;
mm2 = kmalloc(sizeof *mm2, GFP_KERNEL);
if (!mm2)
goto err4;
uresp.qid_mask = rhp->rdev.cqmask;
uresp.cqid = chp->cq.cqid;
uresp.size = chp->cq.size;
uresp.memsize = chp->cq.memsize;
spin_lock(&ucontext->mmap_lock);
uresp.key = ucontext->key;
ucontext->key += PAGE_SIZE;
uresp.gts_key = ucontext->key;
ucontext->key += PAGE_SIZE;
spin_unlock(&ucontext->mmap_lock);
ret = ib_copy_to_udata(udata, &uresp, sizeof uresp);
if (ret)
goto err5;
mm->key = uresp.key;
mm->addr = virt_to_phys(chp->cq.queue);
mm->len = chp->cq.memsize;
insert_mmap(ucontext, mm);
mm2->key = uresp.gts_key;
mm2->addr = chp->cq.ugts;
mm2->len = PAGE_SIZE;
insert_mmap(ucontext, mm2);
}
PDBG("%s cqid 0x%0x chp %p size %u memsize %zu, dma_addr 0x%0llx\n",
__func__, chp->cq.cqid, chp, chp->cq.size,
chp->cq.memsize,
(unsigned long long) chp->cq.dma_addr);
return &chp->ibcq;
err5:
kfree(mm2);
err4:
kfree(mm);
err3:
remove_handle(rhp, &rhp->cqidr, chp->cq.cqid);
err2:
destroy_cq(&chp->rhp->rdev, &chp->cq,
ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
err1:
kfree(chp);
return ERR_PTR(ret);
}
