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-rw-r--r--drivers/infiniband/hw/mlx5/cq.c2
-rw-r--r--drivers/infiniband/hw/mlx5/qp.c4
-rw-r--r--drivers/infiniband/hw/mlx5/srq.c4
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/eq.c2
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c174
-rw-r--r--include/linux/mlx5/driver.h1
6 files changed, 127 insertions, 60 deletions
diff --git a/drivers/infiniband/hw/mlx5/cq.c b/drivers/infiniband/hw/mlx5/cq.c
index 84591865e39d..eecac7b52bcb 100644
--- a/drivers/infiniband/hw/mlx5/cq.c
+++ b/drivers/infiniband/hw/mlx5/cq.c
@@ -620,7 +620,7 @@ static int create_cq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq,
}
mlx5_fill_page_array(&cq->buf.buf, (*cqb)->pas);
- (*cqb)->ctx.log_pg_sz = cq->buf.buf.page_shift - PAGE_SHIFT;
+ (*cqb)->ctx.log_pg_sz = cq->buf.buf.page_shift - 12;
*index = dev->mdev.priv.uuari.uars[0].index;
return 0;
diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index 8a36fd78c89f..ce14008a5702 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -551,7 +551,7 @@ static int create_user_qp(struct mlx5_ib_dev *dev, struct ib_pd *pd,
}
mlx5_ib_populate_pas(dev, qp->umem, page_shift, (*in)->pas, 0);
(*in)->ctx.log_pg_sz_remote_qpn =
- cpu_to_be32((page_shift - PAGE_SHIFT) << 24);
+ cpu_to_be32((page_shift - 12) << 24);
(*in)->ctx.params2 = cpu_to_be32(offset << 6);
(*in)->ctx.qp_counter_set_usr_page = cpu_to_be32(uar_index);
@@ -648,7 +648,7 @@ static int create_kernel_qp(struct mlx5_ib_dev *dev,
goto err_buf;
}
(*in)->ctx.qp_counter_set_usr_page = cpu_to_be32(uar_index);
- (*in)->ctx.log_pg_sz_remote_qpn = cpu_to_be32((qp->buf.page_shift - PAGE_SHIFT) << 24);
+ (*in)->ctx.log_pg_sz_remote_qpn = cpu_to_be32((qp->buf.page_shift - 12) << 24);
/* Set "fast registration enabled" for all kernel QPs */
(*in)->ctx.params1 |= cpu_to_be32(1 << 11);
(*in)->ctx.sq_crq_size |= cpu_to_be16(1 << 4);
diff --git a/drivers/infiniband/hw/mlx5/srq.c b/drivers/infiniband/hw/mlx5/srq.c
index f1e5845b42b0..dbc2c7188c5e 100644
--- a/drivers/infiniband/hw/mlx5/srq.c
+++ b/drivers/infiniband/hw/mlx5/srq.c
@@ -123,7 +123,7 @@ static int create_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq,
goto err_in;
}
- (*in)->ctx.log_pg_sz = page_shift - PAGE_SHIFT;
+ (*in)->ctx.log_pg_sz = page_shift - 12;
(*in)->ctx.pgoff_cqn = cpu_to_be32(offset << 26);
return 0;
@@ -192,7 +192,7 @@ static int create_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq,
}
srq->wq_sig = !!srq_signature;
- (*in)->ctx.log_pg_sz = page_shift - PAGE_SHIFT;
+ (*in)->ctx.log_pg_sz = page_shift - 12;
return 0;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
index 2231d93cc7ad..6b4b436840bd 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
@@ -354,7 +354,7 @@ int mlx5_create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, u8 vecidx,
in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_EQ);
in->ctx.log_sz_usr_page = cpu_to_be32(ilog2(eq->nent) << 24 | uar->index);
in->ctx.intr = vecidx;
- in->ctx.log_page_size = PAGE_SHIFT - 12;
+ in->ctx.log_page_size = eq->buf.page_shift - 12;
in->events_mask = cpu_to_be64(mask);
err = mlx5_cmd_exec(dev, in, inlen, &out, sizeof(out));
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c b/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
index a0d0da35578c..013aa422adee 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
@@ -57,10 +57,13 @@ struct mlx5_pages_req {
};
struct fw_page {
- struct rb_node rb_node;
- u64 addr;
- struct page *page;
- u16 func_id;
+ struct rb_node rb_node;
+ u64 addr;
+ struct page *page;
+ u16 func_id;
+ unsigned long bitmask;
+ struct list_head list;
+ unsigned free_count;
};
struct mlx5_query_pages_inbox {
@@ -94,6 +97,11 @@ enum {
MAX_RECLAIM_TIME_MSECS = 5000,
};
+enum {
+ MLX5_MAX_RECLAIM_TIME_MILI = 5000,
+ MLX5_NUM_4K_IN_PAGE = PAGE_SIZE / 4096,
+};
+
static int insert_page(struct mlx5_core_dev *dev, u64 addr, struct page *page, u16 func_id)
{
struct rb_root *root = &dev->priv.page_root;
@@ -101,6 +109,7 @@ static int insert_page(struct mlx5_core_dev *dev, u64 addr, struct page *page, u
struct rb_node *parent = NULL;
struct fw_page *nfp;
struct fw_page *tfp;
+ int i;
while (*new) {
parent = *new;
@@ -113,25 +122,29 @@ static int insert_page(struct mlx5_core_dev *dev, u64 addr, struct page *page, u
return -EEXIST;
}
- nfp = kmalloc(sizeof(*nfp), GFP_KERNEL);
+ nfp = kzalloc(sizeof(*nfp), GFP_KERNEL);
if (!nfp)
return -ENOMEM;
nfp->addr = addr;
nfp->page = page;
nfp->func_id = func_id;
+ nfp->free_count = MLX5_NUM_4K_IN_PAGE;
+ for (i = 0; i < MLX5_NUM_4K_IN_PAGE; i++)
+ set_bit(i, &nfp->bitmask);
rb_link_node(&nfp->rb_node, parent, new);
rb_insert_color(&nfp->rb_node, root);
+ list_add(&nfp->list, &dev->priv.free_list);
return 0;
}
-static struct page *remove_page(struct mlx5_core_dev *dev, u64 addr)
+static struct fw_page *find_fw_page(struct mlx5_core_dev *dev, u64 addr)
{
struct rb_root *root = &dev->priv.page_root;
struct rb_node *tmp = root->rb_node;
- struct page *result = NULL;
+ struct fw_page *result = NULL;
struct fw_page *tfp;
while (tmp) {
@@ -141,9 +154,7 @@ static struct page *remove_page(struct mlx5_core_dev *dev, u64 addr)
} else if (tfp->addr > addr) {
tmp = tmp->rb_right;
} else {
- rb_erase(&tfp->rb_node, root);
- result = tfp->page;
- kfree(tfp);
+ result = tfp;
break;
}
}
@@ -176,13 +187,97 @@ static int mlx5_cmd_query_pages(struct mlx5_core_dev *dev, u16 *func_id,
return err;
}
+static int alloc_4k(struct mlx5_core_dev *dev, u64 *addr)
+{
+ struct fw_page *fp;
+ unsigned n;
+
+ if (list_empty(&dev->priv.free_list)) {
+ return -ENOMEM;
+ mlx5_core_warn(dev, "\n");
+ }
+
+ fp = list_entry(dev->priv.free_list.next, struct fw_page, list);
+ n = find_first_bit(&fp->bitmask, 8 * sizeof(fp->bitmask));
+ if (n >= MLX5_NUM_4K_IN_PAGE) {
+ mlx5_core_warn(dev, "alloc 4k bug\n");
+ return -ENOENT;
+ }
+ clear_bit(n, &fp->bitmask);
+ fp->free_count--;
+ if (!fp->free_count)
+ list_del(&fp->list);
+
+ *addr = fp->addr + n * 4096;
+
+ return 0;
+}
+
+static void free_4k(struct mlx5_core_dev *dev, u64 addr)
+{
+ struct fw_page *fwp;
+ int n;
+
+ fwp = find_fw_page(dev, addr & PAGE_MASK);
+ if (!fwp) {
+ mlx5_core_warn(dev, "page not found\n");
+ return;
+ }
+
+ n = (addr & ~PAGE_MASK) % 4096;
+ fwp->free_count++;
+ set_bit(n, &fwp->bitmask);
+ if (fwp->free_count == MLX5_NUM_4K_IN_PAGE) {
+ rb_erase(&fwp->rb_node, &dev->priv.page_root);
+ list_del(&fwp->list);
+ dma_unmap_page(&dev->pdev->dev, addr, PAGE_SIZE, DMA_BIDIRECTIONAL);
+ __free_page(fwp->page);
+ kfree(fwp);
+ } else if (fwp->free_count == 1) {
+ list_add(&fwp->list, &dev->priv.free_list);
+ }
+}
+
+static int alloc_system_page(struct mlx5_core_dev *dev, u16 func_id)
+{
+ struct page *page;
+ u64 addr;
+ int err;
+
+ page = alloc_page(GFP_HIGHUSER);
+ if (!page) {
+ mlx5_core_warn(dev, "failed to allocate page\n");
+ return -ENOMEM;
+ }
+ addr = dma_map_page(&dev->pdev->dev, page, 0,
+ PAGE_SIZE, DMA_BIDIRECTIONAL);
+ if (dma_mapping_error(&dev->pdev->dev, addr)) {
+ mlx5_core_warn(dev, "failed dma mapping page\n");
+ err = -ENOMEM;
+ goto out_alloc;
+ }
+ err = insert_page(dev, addr, page, func_id);
+ if (err) {
+ mlx5_core_err(dev, "failed to track allocated page\n");
+ goto out_mapping;
+ }
+
+ return 0;
+
+out_mapping:
+ dma_unmap_page(&dev->pdev->dev, addr, PAGE_SIZE, DMA_BIDIRECTIONAL);
+
+out_alloc:
+ __free_page(page);
+
+ return err;
+}
static int give_pages(struct mlx5_core_dev *dev, u16 func_id, int npages,
int notify_fail)
{
struct mlx5_manage_pages_inbox *in;
struct mlx5_manage_pages_outbox out;
struct mlx5_manage_pages_inbox *nin;
- struct page *page;
int inlen;
u64 addr;
int err;
@@ -197,27 +292,15 @@ static int give_pages(struct mlx5_core_dev *dev, u16 func_id, int npages,
memset(&out, 0, sizeof(out));
for (i = 0; i < npages; i++) {
- page = alloc_page(GFP_HIGHUSER);
- if (!page) {
- err = -ENOMEM;
- mlx5_core_warn(dev, "failed to allocate page\n");
- goto out_alloc;
- }
- addr = dma_map_page(&dev->pdev->dev, page, 0,
- PAGE_SIZE, DMA_BIDIRECTIONAL);
- if (dma_mapping_error(&dev->pdev->dev, addr)) {
- mlx5_core_warn(dev, "failed dma mapping page\n");
- __free_page(page);
- err = -ENOMEM;
- goto out_alloc;
- }
- err = insert_page(dev, addr, page, func_id);
+retry:
+ err = alloc_4k(dev, &addr);
if (err) {
- mlx5_core_err(dev, "failed to track allocated page\n");
- dma_unmap_page(&dev->pdev->dev, addr, PAGE_SIZE, DMA_BIDIRECTIONAL);
- __free_page(page);
- err = -ENOMEM;
- goto out_alloc;
+ if (err == -ENOMEM)
+ err = alloc_system_page(dev, func_id);
+ if (err)
+ goto out_4k;
+
+ goto retry;
}
in->pas[i] = cpu_to_be64(addr);
}
@@ -227,7 +310,6 @@ static int give_pages(struct mlx5_core_dev *dev, u16 func_id, int npages,
in->func_id = cpu_to_be16(func_id);
in->num_entries = cpu_to_be32(npages);
err = mlx5_cmd_exec(dev, in, inlen, &out, sizeof(out));
- mlx5_core_dbg(dev, "err %d\n", err);
if (err) {
mlx5_core_warn(dev, "func_id 0x%x, npages %d, err %d\n", func_id, npages, err);
goto out_alloc;
@@ -251,7 +333,7 @@ out_alloc:
nin = kzalloc(sizeof(*nin), GFP_KERNEL);
if (!nin) {
mlx5_core_warn(dev, "allocation failed\n");
- goto unmap;
+ goto out_4k;
}
memset(&out, 0, sizeof(out));
nin->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_MANAGE_PAGES);
@@ -261,19 +343,9 @@ out_alloc:
kfree(nin);
}
-unmap:
- for (i--; i >= 0; i--) {
- addr = be64_to_cpu(in->pas[i]);
- page = remove_page(dev, addr);
- if (!page) {
- mlx5_core_err(dev, "BUG: can't remove page at addr 0x%llx\n",
- addr);
- continue;
- }
- dma_unmap_page(&dev->pdev->dev, addr, PAGE_SIZE, DMA_BIDIRECTIONAL);
- __free_page(page);
- }
-
+out_4k:
+ for (i--; i >= 0; i--)
+ free_4k(dev, be64_to_cpu(in->pas[i]));
out_free:
mlx5_vfree(in);
return err;
@@ -284,7 +356,6 @@ static int reclaim_pages(struct mlx5_core_dev *dev, u32 func_id, int npages,
{
struct mlx5_manage_pages_inbox in;
struct mlx5_manage_pages_outbox *out;
- struct page *page;
int num_claimed;
int outlen;
u64 addr;
@@ -323,13 +394,7 @@ static int reclaim_pages(struct mlx5_core_dev *dev, u32 func_id, int npages,
for (i = 0; i < num_claimed; i++) {
addr = be64_to_cpu(out->pas[i]);
- page = remove_page(dev, addr);
- if (!page) {
- mlx5_core_warn(dev, "FW reported unknown DMA address 0x%llx\n", addr);
- } else {
- dma_unmap_page(&dev->pdev->dev, addr, PAGE_SIZE, DMA_BIDIRECTIONAL);
- __free_page(page);
- }
+ free_4k(dev, addr);
}
out_free:
@@ -435,6 +500,7 @@ int mlx5_reclaim_startup_pages(struct mlx5_core_dev *dev)
void mlx5_pagealloc_init(struct mlx5_core_dev *dev)
{
dev->priv.page_root = RB_ROOT;
+ INIT_LIST_HEAD(&dev->priv.free_list);
}
void mlx5_pagealloc_cleanup(struct mlx5_core_dev *dev)
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 513619a75695..554548cd3dd4 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -483,6 +483,7 @@ struct mlx5_priv {
struct rb_root page_root;
int fw_pages;
int reg_pages;
+ struct list_head free_list;
struct mlx5_core_health health;
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-31 13:21:05 +0000