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RDMA/umem: Get rid of struct ib_umem.odp_data

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This no longer has any use, we can use container_of to get to the
umem_odp, and a simple flag to indicate if this is an odp MR. Remove the
few remaining references to it.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Jason Gunthorpe 2018-09-16 20:48:06 +03:00 committed by Doug Ledford
parent 41b4deeaa1
commit 597ecc5a09
6 changed files with 27 additions and 26 deletions
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8
drivers/infiniband/core/umem.c
View File

@ -112,7 +112,7 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
umem = kzalloc(sizeof(struct ib_umem_odp), GFP_KERNEL);
if (!umem)
return ERR_PTR(-ENOMEM);
umem->odp_data = to_ib_umem_odp(umem);
umem->is_odp = 1;
} else {
umem = kzalloc(sizeof(*umem), GFP_KERNEL);
if (!umem)
@ -243,7 +243,7 @@ EXPORT_SYMBOL(ib_umem_get);
static void __ib_umem_release_tail(struct ib_umem *umem)
{
mmdrop(umem->owning_mm);
if (umem->odp_data)
if (umem->is_odp)
kfree(to_ib_umem_odp(umem));
else
kfree(umem);
@ -268,7 +268,7 @@ void ib_umem_release(struct ib_umem *umem)
{
struct ib_ucontext *context = umem->context;
if (umem->odp_data) {
if (umem->is_odp) {
ib_umem_odp_release(to_ib_umem_odp(umem));
__ib_umem_release_tail(umem);
return;
@ -306,7 +306,7 @@ int ib_umem_page_count(struct ib_umem *umem)
int n;
struct scatterlist *sg;
if (umem->odp_data)
if (umem->is_odp)
return ib_umem_num_pages(umem);
n = 0;

3
drivers/infiniband/core/umem_odp.c
View File

@ -291,6 +291,7 @@ struct ib_umem_odp *ib_alloc_odp_umem(struct ib_ucontext *context,
umem->address = addr;
umem->page_shift = PAGE_SHIFT;
umem->writable = 1;
umem->is_odp = 1;
mutex_init(&odp_data->umem_mutex);
init_completion(&odp_data->notifier_completion);
@ -319,8 +320,6 @@ struct ib_umem_odp *ib_alloc_odp_umem(struct ib_ucontext *context,
&context->no_private_counters);
up_write(&context->umem_rwsem);
umem->odp_data = odp_data;
return odp_data;
out_page_list:

9
drivers/infiniband/hw/mlx5/mem.c
View File

@ -57,7 +57,7 @@ void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr,
int entry;
unsigned long page_shift = umem->page_shift;
if (umem->odp_data) {
if (umem->is_odp) {
*ncont = ib_umem_page_count(umem);
*count = *ncont << (page_shift - PAGE_SHIFT);
*shift = page_shift;
@ -152,14 +152,13 @@ void __mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem,
struct scatterlist *sg;
int entry;
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
const bool odp = umem->odp_data != NULL;
if (odp) {
if (umem->is_odp) {
WARN_ON(shift != 0);
WARN_ON(access_flags != (MLX5_IB_MTT_READ | MLX5_IB_MTT_WRITE));
for (i = 0; i < num_pages; ++i) {
dma_addr_t pa = umem->odp_data->dma_list[offset + i];
dma_addr_t pa =
to_ib_umem_odp(umem)->dma_list[offset + i];
pas[i] = cpu_to_be64(umem_dma_to_mtt(pa));
}

13
drivers/infiniband/hw/mlx5/mr.c
View File

@ -98,7 +98,7 @@ static bool use_umr_mtt_update(struct mlx5_ib_mr *mr, u64 start, u64 length)
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
static void update_odp_mr(struct mlx5_ib_mr *mr)
{
if (mr->umem->odp_data) {
if (mr->umem->is_odp) {
/*
* This barrier prevents the compiler from moving the
* setting of umem->odp_data->private to point to our
@ -107,7 +107,7 @@ static void update_odp_mr(struct mlx5_ib_mr *mr)
* handle invalidations.
*/
smp_wmb();
mr->umem->odp_data->private = mr;
to_ib_umem_odp(mr->umem)->private = mr;
/*
* Make sure we will see the new
* umem->odp_data->private value in the invalidation
@ -1624,15 +1624,16 @@ static void dereg_mr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
struct ib_umem *umem = mr->umem;
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
if (umem && umem->odp_data) {
if (umem && umem->is_odp) {
struct ib_umem_odp *umem_odp = to_ib_umem_odp(umem);
/* Prevent new page faults from succeeding */
mr->live = 0;
/* Wait for all running page-fault handlers to finish. */
synchronize_srcu(&dev->mr_srcu);
/* Destroy all page mappings */
if (umem->odp_data->page_list)
mlx5_ib_invalidate_range(to_ib_umem_odp(umem),
ib_umem_start(umem),
if (umem_odp->page_list)
mlx5_ib_invalidate_range(umem_odp, ib_umem_start(umem),
ib_umem_end(umem));
else
mlx5_ib_free_implicit_mr(mr);

14
drivers/infiniband/hw/mlx5/odp.c
View File

@ -371,11 +371,12 @@ static struct ib_umem_odp *implicit_mr_get_data(struct mlx5_ib_mr *mr,
struct ib_ucontext *ctx = mr->ibmr.pd->uobject->context;
struct mlx5_ib_dev *dev = to_mdev(mr->ibmr.pd->device);
struct ib_umem_odp *odp, *result = NULL;
struct ib_umem_odp *odp_mr = to_ib_umem_odp(mr->umem);
u64 addr = io_virt & MLX5_IMR_MTT_MASK;
int nentries = 0, start_idx = 0, ret;
struct mlx5_ib_mr *mtt;
mutex_lock(&mr->umem->odp_data->umem_mutex);
mutex_lock(&odp_mr->umem_mutex);
odp = odp_lookup(ctx, addr, 1, mr);
mlx5_ib_dbg(dev, "io_virt:%llx bcnt:%zx addr:%llx odp:%p\n",
@ -388,14 +389,14 @@ next_mr:
} else {
odp = ib_alloc_odp_umem(ctx, addr, MLX5_IMR_MTT_SIZE);
if (IS_ERR(odp)) {
mutex_unlock(&mr->umem->odp_data->umem_mutex);
mutex_unlock(&odp_mr->umem_mutex);
return ERR_CAST(odp);
}
mtt = implicit_mr_alloc(mr->ibmr.pd, &odp->umem, 0,
mr->access_flags);
if (IS_ERR(mtt)) {
mutex_unlock(&mr->umem->odp_data->umem_mutex);
mutex_unlock(&odp_mr->umem_mutex);
ib_umem_release(&odp->umem);
return ERR_CAST(mtt);
}
@ -433,7 +434,7 @@ next_mr:
}
}
mutex_unlock(&mr->umem->odp_data->umem_mutex);
mutex_unlock(&odp_mr->umem_mutex);
return result;
}
@ -498,6 +499,7 @@ void mlx5_ib_free_implicit_mr(struct mlx5_ib_mr *imr)
static int pagefault_mr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr,
u64 io_virt, size_t bcnt, u32 *bytes_mapped)
{
struct ib_umem_odp *odp_mr = to_ib_umem_odp(mr->umem);
u64 access_mask = ODP_READ_ALLOWED_BIT;
int npages = 0, page_shift, np;
u64 start_idx, page_mask;
@ -506,7 +508,7 @@ static int pagefault_mr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr,
size_t size;
int ret;
if (!mr->umem->odp_data->page_list) {
if (!odp_mr->page_list) {
odp = implicit_mr_get_data(mr, io_virt, bcnt);
if (IS_ERR(odp))
@ -514,7 +516,7 @@ static int pagefault_mr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr,
mr = odp->private;
} else {
odp = mr->umem->odp_data;
odp = odp_mr;
}
next_mr:

6
include/rdma/ib_umem.h
View File

@ -46,10 +46,10 @@ struct ib_umem {
size_t length;
unsigned long address;
int page_shift;
int writable;
int hugetlb;
u32 writable : 1;
u32 hugetlb : 1;
u32 is_odp : 1;
struct work_struct work;
struct ib_umem_odp *odp_data;
struct sg_table sg_head;
int nmap;
int npages;