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IB/mlx5: Add MR cache for large UMR regions

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In this change we turn mlx5_ib_update_mtt() into generic
mlx5_ib_update_xlt() to perfrom HCA translation table modifiactions
supporting both atomic and process contexts and not limited by number
of modified entries.
Using this function we increase preallocated MRs up to 16GB.

Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Artemy Kovalyov
2017-01-02 11:37:44 +02:00
committed by David S. Miller
parent c438fde1c2
commit 7d0cc6edcc
7 changed files with 239 additions and 247 deletions
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14
drivers/infiniband/hw/mlx5/main.c
View File

@@ -1112,11 +1112,18 @@ static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev,
context->ibucontext.invalidate_range = &mlx5_ib_invalidate_range;
#endif
context->upd_xlt_page = __get_free_page(GFP_KERNEL);
if (!context->upd_xlt_page) {
err = -ENOMEM;
goto out_uars;
}
mutex_init(&context->upd_xlt_page_mutex);
if (MLX5_CAP_GEN(dev->mdev, log_max_transport_domain)) {
err = mlx5_core_alloc_transport_domain(dev->mdev,
&context->tdn);
if (err)
goto out_uars;
goto out_page;
}
INIT_LIST_HEAD(&context->vma_private_list);
@@ -1168,6 +1175,9 @@ out_td:
if (MLX5_CAP_GEN(dev->mdev, log_max_transport_domain))
mlx5_core_dealloc_transport_domain(dev->mdev, context->tdn);
out_page:
free_page(context->upd_xlt_page);
out_uars:
for (i--; i >= 0; i--)
mlx5_cmd_free_uar(dev->mdev, uars[i].index);
@@ -1195,6 +1205,8 @@ static int mlx5_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
if (MLX5_CAP_GEN(dev->mdev, log_max_transport_domain))
mlx5_core_dealloc_transport_domain(dev->mdev, context->tdn);
free_page(context->upd_xlt_page);
for (i = 0; i < uuari->num_uars; i++) {
if (mlx5_cmd_free_uar(dev->mdev, uuari->uars[i].index))
mlx5_ib_warn(dev, "failed to free UAR 0x%x\n", uuari->uars[i].index);

32
drivers/infiniband/hw/mlx5/mem.c
View File

@@ -159,7 +159,7 @@ void __mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem,
unsigned long umem_page_shift = ilog2(umem->page_size);
int shift = page_shift - umem_page_shift;
int mask = (1 << shift) - 1;
int i, k;
int i, k, idx;
u64 cur = 0;
u64 base;
int len;
@@ -185,18 +185,36 @@ void __mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem,
for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
len = sg_dma_len(sg) >> umem_page_shift;
base = sg_dma_address(sg);
for (k = 0; k < len; k++) {
/* Skip elements below offset */
if (i + len < offset << shift) {
i += len;
continue;
}
/* Skip pages below offset */
if (i < offset << shift) {
k = (offset << shift) - i;
i = offset << shift;
} else {
k = 0;
}
for (; k < len; k++) {
if (!(i & mask)) {
cur = base + (k << umem_page_shift);
cur |= access_flags;
idx = (i >> shift) - offset;
pas[i >> shift] = cpu_to_be64(cur);
pas[idx] = cpu_to_be64(cur);
mlx5_ib_dbg(dev, "pas[%d] 0x%llx\n",
i >> shift, be64_to_cpu(pas[i >> shift]));
} else
mlx5_ib_dbg(dev, "=====> 0x%llx\n",
base + (k << umem_page_shift));
i >> shift, be64_to_cpu(pas[idx]));
}
i++;
/* Stop after num_pages reached */
if (i >> shift >= offset + num_pages)
return;
}
}
}

15
drivers/infiniband/hw/mlx5/mlx5_ib.h
View File

@@ -125,6 +125,10 @@ struct mlx5_ib_ucontext {
/* Transport Domain number */
u32 tdn;
struct list_head vma_private_list;
unsigned long upd_xlt_page;
/* protect ODP/KSM */
struct mutex upd_xlt_page_mutex;
};
static inline struct mlx5_ib_ucontext *to_mucontext(struct ib_ucontext *ibucontext)
@@ -192,6 +196,13 @@ struct mlx5_ib_flow_db {
#define MLX5_IB_UMR_OCTOWORD 16
#define MLX5_IB_UMR_XLT_ALIGNMENT 64
#define MLX5_IB_UPD_XLT_ZAP BIT(0)
#define MLX5_IB_UPD_XLT_ENABLE BIT(1)
#define MLX5_IB_UPD_XLT_ATOMIC BIT(2)
#define MLX5_IB_UPD_XLT_ADDR BIT(3)
#define MLX5_IB_UPD_XLT_PD BIT(4)
#define MLX5_IB_UPD_XLT_ACCESS BIT(5)
/* Private QP creation flags to be passed in ib_qp_init_attr.create_flags.
*
* These flags are intended for internal use by the mlx5_ib driver, and they
@@ -788,8 +799,8 @@ struct ib_mr *mlx5_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
struct ib_mw *mlx5_ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type,
struct ib_udata *udata);
int mlx5_ib_dealloc_mw(struct ib_mw *mw);
int mlx5_ib_update_mtt(struct mlx5_ib_mr *mr, u64 start_page_index,
int npages, int zap);
int mlx5_ib_update_xlt(struct mlx5_ib_mr *mr, u64 idx, int npages,
int page_shift, int flags);
int mlx5_ib_rereg_user_mr(struct ib_mr *ib_mr, int flags, u64 start,
u64 length, u64 virt_addr, int access_flags,
struct ib_pd *pd, struct ib_udata *udata);

384
drivers/infiniband/hw/mlx5/mr.c
View File

@@ -46,14 +46,9 @@ enum {
};
#define MLX5_UMR_ALIGN 2048
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
static __be64 mlx5_ib_update_mtt_emergency_buffer[
MLX5_UMR_MTT_MIN_CHUNK_SIZE/sizeof(__be64)]
__aligned(MLX5_UMR_ALIGN);
static DEFINE_MUTEX(mlx5_ib_update_mtt_emergency_buffer_mutex);
#endif
static int clean_mr(struct mlx5_ib_mr *mr);
static int use_umr(struct mlx5_ib_dev *dev, int order);
static int destroy_mkey(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
{
@@ -629,7 +624,8 @@ int mlx5_mr_cache_init(struct mlx5_ib_dev *dev)
ent->dev = dev;
if ((dev->mdev->profile->mask & MLX5_PROF_MASK_MR_CACHE) &&
(mlx5_core_is_pf(dev->mdev)))
mlx5_core_is_pf(dev->mdev) &&
use_umr(dev, ent->order))
limit = dev->mdev->profile->mr_cache[i].limit;
else
limit = 0;
@@ -757,98 +753,13 @@ static int get_octo_len(u64 addr, u64 len, int page_size)
return (npages + 1) / 2;
}
static int use_umr(int order)
static int use_umr(struct mlx5_ib_dev *dev, int order)
{
if (MLX5_CAP_GEN(dev->mdev, umr_extended_translation_offset))
return order < MAX_MR_CACHE_ENTRIES + 2;
return order <= MLX5_MAX_UMR_SHIFT;
}
static int dma_map_mr_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem,
int npages, int page_shift, int *size,
__be64 **mr_pas, dma_addr_t *dma)
{
__be64 *pas;
struct device *ddev = dev->ib_dev.dma_device;
/*
* UMR copies MTTs in units of MLX5_UMR_MTT_ALIGNMENT bytes.
* To avoid copying garbage after the pas array, we allocate
* a little more.
*/
*size = ALIGN(sizeof(struct mlx5_mtt) * npages, MLX5_UMR_MTT_ALIGNMENT);
*mr_pas = kmalloc(*size + MLX5_UMR_ALIGN - 1, GFP_KERNEL);
if (!(*mr_pas))
return -ENOMEM;
pas = PTR_ALIGN(*mr_pas, MLX5_UMR_ALIGN);
mlx5_ib_populate_pas(dev, umem, page_shift, pas, MLX5_IB_MTT_PRESENT);
/* Clear padding after the actual pages. */
memset(pas + npages, 0, *size - npages * sizeof(struct mlx5_mtt));
*dma = dma_map_single(ddev, pas, *size, DMA_TO_DEVICE);
if (dma_mapping_error(ddev, *dma)) {
kfree(*mr_pas);
return -ENOMEM;
}
return 0;
}
static void prep_umr_wqe_common(struct ib_pd *pd, struct ib_send_wr *wr,
struct ib_sge *sg, u64 dma, int n, u32 key,
int page_shift)
{
struct mlx5_ib_dev *dev = to_mdev(pd->device);
struct mlx5_umr_wr *umrwr = umr_wr(wr);
sg->addr = dma;
sg->length = ALIGN(sizeof(struct mlx5_mtt) * n,
MLX5_IB_UMR_XLT_ALIGNMENT);
sg->lkey = dev->umrc.pd->local_dma_lkey;
wr->next = NULL;
wr->sg_list = sg;
if (n)
wr->num_sge = 1;
else
wr->num_sge = 0;
wr->opcode = MLX5_IB_WR_UMR;
umrwr->xlt_size = sg->length;
umrwr->page_shift = page_shift;
umrwr->mkey = key;
}
static void prep_umr_reg_wqe(struct ib_pd *pd, struct ib_send_wr *wr,
struct ib_sge *sg, u64 dma, int n, u32 key,
int page_shift, u64 virt_addr, u64 len,
int access_flags)
{
struct mlx5_umr_wr *umrwr = umr_wr(wr);
prep_umr_wqe_common(pd, wr, sg, dma, n, key, page_shift);
wr->send_flags = MLX5_IB_SEND_UMR_ENABLE_MR |
MLX5_IB_SEND_UMR_UPDATE_TRANSLATION |
MLX5_IB_SEND_UMR_UPDATE_PD_ACCESS;
umrwr->virt_addr = virt_addr;
umrwr->length = len;
umrwr->access_flags = access_flags;
umrwr->pd = pd;
}
static void prep_umr_unreg_wqe(struct mlx5_ib_dev *dev,
struct ib_send_wr *wr, u32 key)
{
struct mlx5_umr_wr *umrwr = umr_wr(wr);
wr->send_flags = MLX5_IB_SEND_UMR_DISABLE_MR |
MLX5_IB_SEND_UMR_FAIL_IF_FREE;
wr->opcode = MLX5_IB_WR_UMR;
umrwr->mkey = key;
}
static int mr_umem_get(struct ib_pd *pd, u64 start, u64 length,
int access_flags, struct ib_umem **umem,
int *npages, int *page_shift, int *ncont,
@@ -927,13 +838,7 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
int page_shift, int order, int access_flags)
{
struct mlx5_ib_dev *dev = to_mdev(pd->device);
struct device *ddev = dev->ib_dev.dma_device;
struct mlx5_umr_wr umrwr = {};
struct mlx5_ib_mr *mr;
struct ib_sge sg;
int size;
__be64 *mr_pas;
dma_addr_t dma;
int err = 0;
int i;
@@ -952,144 +857,174 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
if (!mr)
return ERR_PTR(-EAGAIN);
err = dma_map_mr_pas(dev, umem, npages, page_shift, &size, &mr_pas,
&dma);
if (err)
goto free_mr;
prep_umr_reg_wqe(pd, &umrwr.wr, &sg, dma, npages, mr->mmkey.key,
page_shift, virt_addr, len, access_flags);
err = mlx5_ib_post_send_wait(dev, &umrwr);
if (err && err != -EFAULT)
goto unmap_dma;
mr->ibmr.pd = pd;
mr->umem = umem;
mr->access_flags = access_flags;
mr->desc_size = sizeof(struct mlx5_mtt);
mr->mmkey.iova = virt_addr;
mr->mmkey.size = len;
mr->mmkey.pd = to_mpd(pd)->pdn;
mr->live = 1;
err = mlx5_ib_update_xlt(mr, 0, npages, page_shift,
MLX5_IB_UPD_XLT_ENABLE);
unmap_dma:
dma_unmap_single(ddev, dma, size, DMA_TO_DEVICE);
kfree(mr_pas);
free_mr:
if (err) {
free_cached_mr(dev, mr);
return ERR_PTR(err);
}
mr->live = 1;
return mr;
}
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
int mlx5_ib_update_mtt(struct mlx5_ib_mr *mr, u64 start_page_index, int npages,
int zap)
static inline int populate_xlt(struct mlx5_ib_mr *mr, int idx, int npages,
void *xlt, int page_shift, size_t size,
int flags)
{
struct mlx5_ib_dev *dev = mr->dev;
struct ib_umem *umem = mr->umem;
npages = min_t(size_t, npages, ib_umem_num_pages(umem) - idx);
if (!(flags & MLX5_IB_UPD_XLT_ZAP)) {
__mlx5_ib_populate_pas(dev, umem, page_shift,
idx, npages, xlt,
MLX5_IB_MTT_PRESENT);
/* Clear padding after the pages
* brought from the umem.
*/
memset(xlt + (npages * sizeof(struct mlx5_mtt)), 0,
size - npages * sizeof(struct mlx5_mtt));
}
return npages;
}
#define MLX5_MAX_UMR_CHUNK ((1 << (MLX5_MAX_UMR_SHIFT + 4)) - \
MLX5_UMR_MTT_ALIGNMENT)
#define MLX5_SPARE_UMR_CHUNK 0x10000
int mlx5_ib_update_xlt(struct mlx5_ib_mr *mr, u64 idx, int npages,
int page_shift, int flags)
{
struct mlx5_ib_dev *dev = mr->dev;
struct device *ddev = dev->ib_dev.dma_device;
struct ib_umem *umem = mr->umem;
struct mlx5_ib_ucontext *uctx = NULL;
int size;
__be64 *pas;
void *xlt;
dma_addr_t dma;
struct mlx5_umr_wr wr;
struct ib_sge sg;
int err = 0;
const int page_index_alignment = MLX5_UMR_MTT_ALIGNMENT /
sizeof(struct mlx5_mtt);
const int page_index_mask = page_index_alignment - 1;
int desc_size = sizeof(struct mlx5_mtt);
const int page_align = MLX5_UMR_MTT_ALIGNMENT / desc_size;
const int page_mask = page_align - 1;
size_t pages_mapped = 0;
size_t pages_to_map = 0;
size_t pages_iter = 0;
int use_emergency_buf = 0;
gfp_t gfp;
/* UMR copies MTTs in units of MLX5_UMR_MTT_ALIGNMENT bytes,
* so we need to align the offset and length accordingly */
if (start_page_index & page_index_mask) {
npages += start_page_index & page_index_mask;
start_page_index &= ~page_index_mask;
* so we need to align the offset and length accordingly
*/
if (idx & page_mask) {
npages += idx & page_mask;
idx &= ~page_mask;
}
pages_to_map = ALIGN(npages, page_index_alignment);
gfp = flags & MLX5_IB_UPD_XLT_ATOMIC ? GFP_ATOMIC : GFP_KERNEL;
gfp |= __GFP_ZERO | __GFP_NOWARN;
if (start_page_index + pages_to_map > MLX5_MAX_UMR_PAGES)
return -EINVAL;
pages_to_map = ALIGN(npages, page_align);
size = desc_size * pages_to_map;
size = min_t(int, size, MLX5_MAX_UMR_CHUNK);
size = sizeof(struct mlx5_mtt) * pages_to_map;
size = min_t(int, PAGE_SIZE, size);
/* We allocate with GFP_ATOMIC to avoid recursion into page-reclaim
* code, when we are called from an invalidation. The pas buffer must
* be 2k-aligned for Connect-IB. */
pas = (__be64 *)get_zeroed_page(GFP_ATOMIC);
if (!pas) {
mlx5_ib_warn(dev, "unable to allocate memory during MTT update, falling back to slower chunked mechanism.\n");
pas = mlx5_ib_update_mtt_emergency_buffer;
size = MLX5_UMR_MTT_MIN_CHUNK_SIZE;
use_emergency_buf = 1;
mutex_lock(&mlx5_ib_update_mtt_emergency_buffer_mutex);
memset(pas, 0, size);
xlt = (void *)__get_free_pages(gfp, get_order(size));
if (!xlt && size > MLX5_SPARE_UMR_CHUNK) {
mlx5_ib_dbg(dev, "Failed to allocate %d bytes of order %d. fallback to spare UMR allocation od %d bytes\n",
size, get_order(size), MLX5_SPARE_UMR_CHUNK);
size = MLX5_SPARE_UMR_CHUNK;
xlt = (void *)__get_free_pages(gfp, get_order(size));
}
pages_iter = size / sizeof(struct mlx5_mtt);
dma = dma_map_single(ddev, pas, size, DMA_TO_DEVICE);
if (!xlt) {
uctx = to_mucontext(mr->ibmr.uobject->context);
mlx5_ib_warn(dev, "Using XLT emergency buffer\n");
size = PAGE_SIZE;
xlt = (void *)uctx->upd_xlt_page;
mutex_lock(&uctx->upd_xlt_page_mutex);
memset(xlt, 0, size);
}
pages_iter = size / desc_size;
dma = dma_map_single(ddev, xlt, size, DMA_TO_DEVICE);
if (dma_mapping_error(ddev, dma)) {
mlx5_ib_err(dev, "unable to map DMA during MTT update.\n");
mlx5_ib_err(dev, "unable to map DMA during XLT update.\n");
err = -ENOMEM;
goto free_pas;
goto free_xlt;
}
sg.addr = dma;
sg.lkey = dev->umrc.pd->local_dma_lkey;
memset(&wr, 0, sizeof(wr));
wr.wr.send_flags = MLX5_IB_SEND_UMR_UPDATE_XLT;
if (!(flags & MLX5_IB_UPD_XLT_ENABLE))
wr.wr.send_flags |= MLX5_IB_SEND_UMR_FAIL_IF_FREE;
wr.wr.sg_list = &sg;
wr.wr.num_sge = 1;
wr.wr.opcode = MLX5_IB_WR_UMR;
wr.pd = mr->ibmr.pd;
wr.mkey = mr->mmkey.key;
wr.length = mr->mmkey.size;
wr.virt_addr = mr->mmkey.iova;
wr.access_flags = mr->access_flags;
wr.page_shift = page_shift;
for (pages_mapped = 0;
pages_mapped < pages_to_map && !err;
pages_mapped += pages_iter, start_page_index += pages_iter) {
pages_mapped += pages_iter, idx += pages_iter) {
dma_sync_single_for_cpu(ddev, dma, size, DMA_TO_DEVICE);
npages = min_t(size_t,
pages_iter,
ib_umem_num_pages(umem) - start_page_index);
if (!zap) {
__mlx5_ib_populate_pas(dev, umem, PAGE_SHIFT,
start_page_index, npages, pas,
MLX5_IB_MTT_PRESENT);
/* Clear padding after the pages brought from the
* umem. */
memset(pas + npages, 0, size - npages *
sizeof(struct mlx5_mtt));
}
npages = populate_xlt(mr, idx, pages_iter, xlt,
page_shift, size, flags);
dma_sync_single_for_device(ddev, dma, size, DMA_TO_DEVICE);
memset(&wr, 0, sizeof(wr));
sg.length = ALIGN(npages * desc_size,
MLX5_UMR_MTT_ALIGNMENT);
sg.addr = dma;
sg.length = ALIGN(npages * sizeof(struct mlx5_mtt),
MLX5_UMR_MTT_ALIGNMENT);
sg.lkey = dev->umrc.pd->local_dma_lkey;
if (pages_mapped + pages_iter >= pages_to_map) {
if (flags & MLX5_IB_UPD_XLT_ENABLE)
wr.wr.send_flags |=
MLX5_IB_SEND_UMR_ENABLE_MR |
MLX5_IB_SEND_UMR_UPDATE_PD_ACCESS |
MLX5_IB_SEND_UMR_UPDATE_TRANSLATION;
if (flags & MLX5_IB_UPD_XLT_PD ||
flags & MLX5_IB_UPD_XLT_ACCESS)
wr.wr.send_flags |=
MLX5_IB_SEND_UMR_UPDATE_PD_ACCESS;
if (flags & MLX5_IB_UPD_XLT_ADDR)
wr.wr.send_flags |=
MLX5_IB_SEND_UMR_UPDATE_TRANSLATION;
}
wr.wr.send_flags = MLX5_IB_SEND_UMR_FAIL_IF_FREE |
MLX5_IB_SEND_UMR_UPDATE_XLT;
wr.wr.sg_list = &sg;
wr.wr.num_sge = 1;
wr.wr.opcode = MLX5_IB_WR_UMR;
wr.offset = idx * desc_size;
wr.xlt_size = sg.length;
wr.page_shift = PAGE_SHIFT;
wr.mkey = mr->mmkey.key;
wr.offset = start_page_index * sizeof(struct mlx5_mtt);
err = mlx5_ib_post_send_wait(dev, &wr);
}
dma_unmap_single(ddev, dma, size, DMA_TO_DEVICE);
free_pas:
if (!use_emergency_buf)
free_page((unsigned long)pas);
free_xlt:
if (uctx)
mutex_unlock(&uctx->upd_xlt_page_mutex);
else
mutex_unlock(&mlx5_ib_update_mtt_emergency_buffer_mutex);
free_pages((unsigned long)xlt, get_order(size));
return err;
}
#endif
/*
* If ibmr is NULL it will be allocated by reg_create.
@@ -1204,7 +1139,7 @@ struct ib_mr *mlx5_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
if (err < 0)
return ERR_PTR(err);
if (use_umr(order)) {
if (use_umr(dev, order)) {
mr = reg_umr(pd, umem, virt_addr, length, ncont, page_shift,
order, access_flags);
if (PTR_ERR(mr) == -EAGAIN) {
@@ -1254,39 +1189,25 @@ static int unreg_umr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
if (mdev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR)
return 0;
prep_umr_unreg_wqe(dev, &umrwr.wr, mr->mmkey.key);
umrwr.wr.send_flags = MLX5_IB_SEND_UMR_DISABLE_MR |
MLX5_IB_SEND_UMR_FAIL_IF_FREE;
umrwr.wr.opcode = MLX5_IB_WR_UMR;
umrwr.mkey = mr->mmkey.key;
return mlx5_ib_post_send_wait(dev, &umrwr);
}
static int rereg_umr(struct ib_pd *pd, struct mlx5_ib_mr *mr, u64 virt_addr,
u64 length, int npages, int page_shift, int order,
static int rereg_umr(struct ib_pd *pd, struct mlx5_ib_mr *mr,
int access_flags, int flags)
{
struct mlx5_ib_dev *dev = to_mdev(pd->device);
struct device *ddev = dev->ib_dev.dma_device;
struct mlx5_umr_wr umrwr = {};
struct ib_sge sg;
dma_addr_t dma = 0;
__be64 *mr_pas = NULL;
int size;
int err;
umrwr.wr.send_flags = MLX5_IB_SEND_UMR_FAIL_IF_FREE;
if (flags & IB_MR_REREG_TRANS) {
err = dma_map_mr_pas(dev, mr->umem, npages, page_shift, &size,
&mr_pas, &dma);
if (err)
return err;
umrwr.virt_addr = virt_addr;
umrwr.length = length;
umrwr.wr.send_flags |= MLX5_IB_SEND_UMR_UPDATE_TRANSLATION;
}
prep_umr_wqe_common(pd, &umrwr.wr, &sg, dma, npages, mr->mmkey.key,
page_shift);
umrwr.wr.opcode = MLX5_IB_WR_UMR;
umrwr.mkey = mr->mmkey.key;
if (flags & IB_MR_REREG_PD || flags & IB_MR_REREG_ACCESS) {
umrwr.pd = pd;
@@ -1294,13 +1215,8 @@ static int rereg_umr(struct ib_pd *pd, struct mlx5_ib_mr *mr, u64 virt_addr,
umrwr.wr.send_flags |= MLX5_IB_SEND_UMR_UPDATE_PD_ACCESS;
}
/* post send request to UMR QP */
err = mlx5_ib_post_send_wait(dev, &umrwr);
if (flags & IB_MR_REREG_TRANS) {
dma_unmap_single(ddev, dma, size, DMA_TO_DEVICE);
kfree(mr_pas);
}
return err;
}
@@ -1317,6 +1233,7 @@ int mlx5_ib_rereg_user_mr(struct ib_mr *ib_mr, int flags, u64 start,
u64 addr = (flags & IB_MR_REREG_TRANS) ? virt_addr : mr->umem->address;
u64 len = (flags & IB_MR_REREG_TRANS) ? length : mr->umem->length;
int page_shift = 0;
int upd_flags = 0;
int npages = 0;
int ncont = 0;
int order = 0;
@@ -1325,6 +1242,8 @@ int mlx5_ib_rereg_user_mr(struct ib_mr *ib_mr, int flags, u64 start,
mlx5_ib_dbg(dev, "start 0x%llx, virt_addr 0x%llx, length 0x%llx, access_flags 0x%x\n",
start, virt_addr, length, access_flags);
atomic_sub(mr->npages, &dev->mdev->priv.reg_pages);
if (flags != IB_MR_REREG_PD) {
/*
* Replace umem. This needs to be done whether or not UMR is
@@ -1335,7 +1254,7 @@ int mlx5_ib_rereg_user_mr(struct ib_mr *ib_mr, int flags, u64 start,
err = mr_umem_get(pd, addr, len, access_flags, &mr->umem,
&npages, &page_shift, &ncont, &order);
if (err < 0) {
mr->umem = NULL;
clean_mr(mr);
return err;
}
}
@@ -1367,32 +1286,37 @@ int mlx5_ib_rereg_user_mr(struct ib_mr *ib_mr, int flags, u64 start,
/*
* Send a UMR WQE
*/
err = rereg_umr(pd, mr, addr, len, npages, page_shift,
order, access_flags, flags);
mr->ibmr.pd = pd;
mr->access_flags = access_flags;
mr->mmkey.iova = addr;
mr->mmkey.size = len;
mr->mmkey.pd = to_mpd(pd)->pdn;
if (flags & IB_MR_REREG_TRANS) {
upd_flags = MLX5_IB_UPD_XLT_ADDR;
if (flags & IB_MR_REREG_PD)
upd_flags |= MLX5_IB_UPD_XLT_PD;
if (flags & IB_MR_REREG_ACCESS)
upd_flags |= MLX5_IB_UPD_XLT_ACCESS;
err = mlx5_ib_update_xlt(mr, 0, npages, page_shift,
upd_flags);
} else {
err = rereg_umr(pd, mr, access_flags, flags);
}
if (err) {
mlx5_ib_warn(dev, "Failed to rereg UMR\n");
ib_umem_release(mr->umem);
clean_mr(mr);
return err;
}
}
if (flags & IB_MR_REREG_PD) {
ib_mr->pd = pd;
mr->mmkey.pd = to_mpd(pd)->pdn;
}
set_mr_fileds(dev, mr, npages, len, access_flags);
if (flags & IB_MR_REREG_ACCESS)
mr->access_flags = access_flags;
if (flags & IB_MR_REREG_TRANS) {
atomic_sub(mr->npages, &dev->mdev->priv.reg_pages);
set_mr_fileds(dev, mr, npages, len, access_flags);
mr->mmkey.iova = addr;
mr->mmkey.size = len;
}
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
update_odp_mr(mr);
#endif
return 0;
}

19
drivers/infiniband/hw/mlx5/odp.c
View File

@@ -91,16 +91,21 @@ void mlx5_ib_invalidate_range(struct ib_umem *umem, unsigned long start,
u64 umr_offset = idx & umr_block_mask;
if (in_block && umr_offset == 0) {
mlx5_ib_update_mtt(mr, blk_start_idx,
idx - blk_start_idx, 1);
mlx5_ib_update_xlt(mr, blk_start_idx,
idx - blk_start_idx,
PAGE_SHIFT,
MLX5_IB_UPD_XLT_ZAP |
MLX5_IB_UPD_XLT_ATOMIC);
in_block = 0;
}
}
}
if (in_block)
mlx5_ib_update_mtt(mr, blk_start_idx, idx - blk_start_idx + 1,
1);
mlx5_ib_update_xlt(mr, blk_start_idx,
idx - blk_start_idx + 1,
PAGE_SHIFT,
MLX5_IB_UPD_XLT_ZAP |
MLX5_IB_UPD_XLT_ATOMIC);
/*
* We are now sure that the device will not access the
* memory. We can safely unmap it, and mark it as dirty if
@@ -257,7 +262,9 @@ static int pagefault_single_data_segment(struct mlx5_ib_qp *qp,
* this MR, since ib_umem_odp_map_dma_pages already
* checks this.
*/
ret = mlx5_ib_update_mtt(mr, start_idx, npages, 0);
ret = mlx5_ib_update_xlt(mr, start_idx, npages,
PAGE_SHIFT,
MLX5_IB_UPD_XLT_ATOMIC);
} else {
ret = -EAGAIN;
}

20
drivers/net/ethernet/mellanox/mlx5/core/main.c
View File

@@ -152,6 +152,26 @@ static struct mlx5_profile profile[] = {
.size = 8,
.limit = 4
},
.mr_cache[16] = {
.size = 8,
.limit = 4
},
.mr_cache[17] = {
.size = 8,
.limit = 4
},
.mr_cache[18] = {
.size = 8,
.limit = 4
},
.mr_cache[19] = {
.size = 4,
.limit = 2
},
.mr_cache[20] = {
.size = 4,
.limit = 2
},
},
};

2
include/linux/mlx5/driver.h
View File

@@ -959,7 +959,7 @@ enum {
};
enum {
MAX_MR_CACHE_ENTRIES = 16,
MAX_MR_CACHE_ENTRIES = 21,
};
enum {