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-rw-r--r--drivers/infiniband/hw/mlx5/mem.c58
-rw-r--r--drivers/infiniband/hw/mlx5/mlx5_ib.h12
-rw-r--r--drivers/infiniband/hw/mlx5/mr.c33
-rw-r--r--include/linux/mlx5/device.h3
4 files changed, 88 insertions, 18 deletions
diff --git a/drivers/infiniband/hw/mlx5/mem.c b/drivers/infiniband/hw/mlx5/mem.c
index dae07eae9507..5f7b30147180 100644
--- a/drivers/infiniband/hw/mlx5/mem.c
+++ b/drivers/infiniband/hw/mlx5/mem.c
@@ -32,6 +32,7 @@
#include <linux/module.h>
#include <rdma/ib_umem.h>
+#include <rdma/ib_umem_odp.h>
#include "mlx5_ib.h"
/* @umem: umem object to scan
@@ -57,6 +58,17 @@ void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, int *count, int *shift,
int entry;
unsigned long page_shift = ilog2(umem->page_size);
+ /* With ODP we must always match OS page size. */
+ if (umem->odp_data) {
+ *count = ib_umem_page_count(umem);
+ *shift = PAGE_SHIFT;
+ *ncont = *count;
+ if (order)
+ *order = ilog2(roundup_pow_of_two(*count));
+
+ return;
+ }
+
addr = addr >> page_shift;
tmp = (unsigned long)addr;
m = find_first_bit(&tmp, sizeof(tmp));
@@ -108,8 +120,32 @@ void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, int *count, int *shift,
*count = i;
}
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+static u64 umem_dma_to_mtt(dma_addr_t umem_dma)
+{
+ u64 mtt_entry = umem_dma & ODP_DMA_ADDR_MASK;
+
+ if (umem_dma & ODP_READ_ALLOWED_BIT)
+ mtt_entry |= MLX5_IB_MTT_READ;
+ if (umem_dma & ODP_WRITE_ALLOWED_BIT)
+ mtt_entry |= MLX5_IB_MTT_WRITE;
+
+ return mtt_entry;
+}
+#endif
+
+/*
+ * Populate the given array with bus addresses from the umem.
+ *
+ * dev - mlx5_ib device
+ * umem - umem to use to fill the pages
+ * page_shift - determines the page size used in the resulting array
+ * pas - bus addresses array to fill
+ * access_flags - access flags to set on all present pages.
+ use enum mlx5_ib_mtt_access_flags for this.
+ */
void mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem,
- int page_shift, __be64 *pas, int umr)
+ int page_shift, __be64 *pas, int access_flags)
{
unsigned long umem_page_shift = ilog2(umem->page_size);
int shift = page_shift - umem_page_shift;
@@ -120,6 +156,23 @@ void mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem,
int len;
struct scatterlist *sg;
int entry;
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+ const bool odp = umem->odp_data != NULL;
+
+ if (odp) {
+ int num_pages = ib_umem_num_pages(umem);
+
+ 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[i];
+
+ pas[i] = cpu_to_be64(umem_dma_to_mtt(pa));
+ }
+ return;
+ }
+#endif
i = 0;
for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
@@ -128,8 +181,7 @@ void mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem,
for (k = 0; k < len; k++) {
if (!(i & mask)) {
cur = base + (k << umem_page_shift);
- if (umr)
- cur |= 3;
+ cur |= access_flags;
pas[i >> shift] = cpu_to_be64(cur);
mlx5_ib_dbg(dev, "pas[%d] 0x%llx\n",
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index cc50fce8cca7..83c1690e9dd0 100644
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -268,6 +268,13 @@ struct mlx5_ib_xrcd {
u32 xrcdn;
};
+enum mlx5_ib_mtt_access_flags {
+ MLX5_IB_MTT_READ = (1 << 0),
+ MLX5_IB_MTT_WRITE = (1 << 1),
+};
+
+#define MLX5_IB_MTT_PRESENT (MLX5_IB_MTT_READ | MLX5_IB_MTT_WRITE)
+
struct mlx5_ib_mr {
struct ib_mr ibmr;
struct mlx5_core_mr mmr;
@@ -552,7 +559,7 @@ void mlx5_ib_cleanup_fmr(struct mlx5_ib_dev *dev);
void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, int *count, int *shift,
int *ncont, int *order);
void mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem,
- int page_shift, __be64 *pas, int umr);
+ int page_shift, __be64 *pas, int access_flags);
void mlx5_ib_copy_pas(u64 *old, u64 *new, int step, int num);
int mlx5_ib_get_cqe_size(struct mlx5_ib_dev *dev, struct ib_cq *ibcq);
int mlx5_mr_cache_init(struct mlx5_ib_dev *dev);
@@ -588,4 +595,7 @@ static inline u8 convert_access(int acc)
MLX5_PERM_LOCAL_READ;
}
+#define MLX5_MAX_UMR_SHIFT 16
+#define MLX5_MAX_UMR_PAGES (1 << MLX5_MAX_UMR_SHIFT)
+
#endif /* MLX5_IB_H */
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
index 2de4f4448f8a..49fc3ca735a4 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -48,13 +48,6 @@ enum {
MLX5_UMR_ALIGN = 2048
};
-static __be64 *mr_align(__be64 *ptr, int align)
-{
- unsigned long mask = align - 1;
-
- return (__be64 *)(((unsigned long)ptr + mask) & ~mask);
-}
-
static int order2idx(struct mlx5_ib_dev *dev, int order)
{
struct mlx5_mr_cache *cache = &dev->cache;
@@ -669,7 +662,7 @@ static int get_octo_len(u64 addr, u64 len, int page_size)
static int use_umr(int order)
{
- return order <= 17;
+ return order <= MLX5_MAX_UMR_SHIFT;
}
static void prep_umr_reg_wqe(struct ib_pd *pd, struct ib_send_wr *wr,
@@ -747,8 +740,9 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
struct ib_send_wr wr, *bad;
struct mlx5_ib_mr *mr;
struct ib_sge sg;
- int size = sizeof(u64) * npages;
+ int size;
__be64 *mr_pas;
+ __be64 *pas;
dma_addr_t dma;
int err = 0;
int i;
@@ -768,17 +762,22 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
if (!mr)
return ERR_PTR(-EAGAIN);
+ /* 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(u64) * npages, MLX5_UMR_MTT_ALIGNMENT);
mr_pas = kmalloc(size + MLX5_UMR_ALIGN - 1, GFP_KERNEL);
if (!mr_pas) {
err = -ENOMEM;
goto free_mr;
}
- mlx5_ib_populate_pas(dev, umem, page_shift,
- mr_align(mr_pas, MLX5_UMR_ALIGN), 1);
+ 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(u64));
- dma = dma_map_single(ddev, mr_align(mr_pas, MLX5_UMR_ALIGN), size,
- DMA_TO_DEVICE);
+ dma = dma_map_single(ddev, pas, size, DMA_TO_DEVICE);
if (dma_mapping_error(ddev, dma)) {
err = -ENOMEM;
goto free_pas;
@@ -833,6 +832,8 @@ static struct mlx5_ib_mr *reg_create(struct ib_pd *pd, u64 virt_addr,
struct mlx5_ib_mr *mr;
int inlen;
int err;
+ bool pg_cap = !!(dev->mdev->caps.gen.flags &
+ MLX5_DEV_CAP_FLAG_ON_DMND_PG);
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr)
@@ -844,8 +845,12 @@ static struct mlx5_ib_mr *reg_create(struct ib_pd *pd, u64 virt_addr,
err = -ENOMEM;
goto err_1;
}
- mlx5_ib_populate_pas(dev, umem, page_shift, in->pas, 0);
+ mlx5_ib_populate_pas(dev, umem, page_shift, in->pas,
+ pg_cap ? MLX5_IB_MTT_PRESENT : 0);
+ /* The MLX5_MKEY_INBOX_PG_ACCESS bit allows setting the access flags
+ * in the page list submitted with the command. */
+ in->flags = pg_cap ? cpu_to_be32(MLX5_MKEY_INBOX_PG_ACCESS) : 0;
in->seg.flags = convert_access(access_flags) |
MLX5_ACCESS_MODE_MTT;
in->seg.flags_pd = cpu_to_be32(to_mpd(pd)->pdn);
diff --git a/include/linux/mlx5/device.h b/include/linux/mlx5/device.h
index 70c28239e339..64512a7354cb 100644
--- a/include/linux/mlx5/device.h
+++ b/include/linux/mlx5/device.h
@@ -198,6 +198,9 @@ enum {
MLX5_UMR_INLINE = (1 << 7),
};
+#define MLX5_UMR_MTT_ALIGNMENT 0x40
+#define MLX5_UMR_MTT_MASK (MLX5_UMR_MTT_ALIGNMENT - 1)
+
enum mlx5_event {
MLX5_EVENT_TYPE_COMP = 0x0,
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-08 10:03:37 +0300