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RDMA: Handle PD allocations by IB/core

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The PD allocations in IB/core allows us to simplify drivers and their
error flows in their .alloc_pd() paths. The changes in .alloc_pd() go hand
in had with relevant update in .dealloc_pd().

We will use this opportunity and convert .dealloc_pd() to don't fail, as
it was suggested a long time ago, failures are not happening as we have
never seen a WARN_ON print.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Leon Romanovsky
2019-02-03 14:55:51 +02:00
committed by Jason Gunthorpe
parent 30471d4b20
commit 21a428a019
39 changed files with 325 additions and 409 deletions
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32
drivers/infiniband/hw/nes/nes_verbs.c
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@@ -658,10 +658,11 @@ static int nes_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
/**
* nes_alloc_pd
*/
static struct ib_pd *nes_alloc_pd(struct ib_device *ibdev,
struct ib_ucontext *context, struct ib_udata *udata)
static int nes_alloc_pd(struct ib_pd *pd, struct ib_ucontext *context,
struct ib_udata *udata)
{
struct nes_pd *nespd;
struct ib_device *ibdev = pd->device;
struct nes_pd *nespd = to_nespd(pd);
struct nes_vnic *nesvnic = to_nesvnic(ibdev);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_adapter *nesadapter = nesdev->nesadapter;
@@ -676,15 +677,8 @@ static struct ib_pd *nes_alloc_pd(struct ib_device *ibdev,
err = nes_alloc_resource(nesadapter, nesadapter->allocated_pds,
nesadapter->max_pd, &pd_num, &nesadapter->next_pd, NES_RESOURCE_PD);
if (err) {
return ERR_PTR(err);
}
nespd = kzalloc(sizeof (struct nes_pd), GFP_KERNEL);
if (!nespd) {
nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
return ERR_PTR(-ENOMEM);
}
if (err)
return err;
nes_debug(NES_DBG_PD, "Allocating PD (%p) for ib device %s\n",
nespd, dev_name(&nesvnic->nesibdev->ibdev.dev));
@@ -700,16 +694,14 @@ static struct ib_pd *nes_alloc_pd(struct ib_device *ibdev,
if (nespd->mmap_db_index >= NES_MAX_USER_DB_REGIONS) {
nes_debug(NES_DBG_PD, "mmap_db_index > MAX\n");
nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
kfree(nespd);
return ERR_PTR(-ENOMEM);
return -ENOMEM;
}
uresp.pd_id = nespd->pd_id;
uresp.mmap_db_index = nespd->mmap_db_index;
if (ib_copy_to_udata(udata, &uresp, sizeof (struct nes_alloc_pd_resp))) {
nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
kfree(nespd);
return ERR_PTR(-EFAULT);
return -EFAULT;
}
set_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
@@ -718,14 +710,14 @@ static struct ib_pd *nes_alloc_pd(struct ib_device *ibdev,
}
nes_debug(NES_DBG_PD, "PD%u structure located @%p.\n", nespd->pd_id, nespd);
return &nespd->ibpd;
return 0;
}
/**
* nes_dealloc_pd
*/
static int nes_dealloc_pd(struct ib_pd *ibpd)
static void nes_dealloc_pd(struct ib_pd *ibpd)
{
struct nes_ucontext *nesucontext;
struct nes_pd *nespd = to_nespd(ibpd);
@@ -748,9 +740,6 @@ static int nes_dealloc_pd(struct ib_pd *ibpd)
nespd->pd_id, nespd);
nes_free_resource(nesadapter, nesadapter->allocated_pds,
(nespd->pd_id-nesadapter->base_pd)>>(PAGE_SHIFT-12));
kfree(nespd);
return 0;
}
@@ -3658,6 +3647,7 @@ static const struct ib_device_ops nes_dev_ops = {
.query_qp = nes_query_qp,
.reg_user_mr = nes_reg_user_mr,
.req_notify_cq = nes_req_notify_cq,
INIT_RDMA_OBJ_SIZE(ib_pd, nes_pd, ibpd),
};
/**