@@ -2022,6 +2022,17 @@ static phys_addr_t uar_index2pfn(struct mlx5_ib_dev *dev,
return (dev->mdev->bar_addr >> PAGE_SHIFT) + uar_idx / fw_uars_per_page;
}
+static u64 uar_index2paddress(struct mlx5_ib_dev *dev,
+ int uar_idx)
+{
+ unsigned int fw_uars_per_page;
+
+ fw_uars_per_page = MLX5_CAP_GEN(dev->mdev, uar_4k) ?
+ MLX5_UARS_IN_PAGE : 1;
+
+ return (dev->mdev->bar_addr + (uar_idx / fw_uars_per_page) * PAGE_SIZE);
+}
+
static int get_command(unsigned long offset)
{
return (offset >> MLX5_IB_MMAP_CMD_SHIFT) & MLX5_IB_MMAP_CMD_MASK;
@@ -2106,6 +2117,11 @@ static void mlx5_ib_mmap_free(struct rdma_user_mmap_entry *entry)
mutex_unlock(&var_table->bitmap_lock);
kfree(mentry);
break;
+ case MLX5_IB_MMAP_TYPE_UAR_WC:
+ case MLX5_IB_MMAP_TYPE_UAR_NC:
+ mlx5_cmd_free_uar(dev->mdev, mentry->page_idx);
+ kfree(mentry);
+ break;
default:
WARN_ON(true);
}
@@ -2257,7 +2273,8 @@ static int mlx5_ib_mmap_offset(struct mlx5_ib_dev *dev,
mentry = to_mmmap(entry);
pfn = (mentry->address >> PAGE_SHIFT);
- if (mentry->mmap_flag == MLX5_IB_MMAP_TYPE_VAR)
+ if (mentry->mmap_flag == MLX5_IB_MMAP_TYPE_VAR ||
+ mentry->mmap_flag == MLX5_IB_MMAP_TYPE_UAR_NC)
prot = pgprot_noncached(vma->vm_page_prot);
else
prot = pgprot_writecombine(vma->vm_page_prot);
@@ -6079,9 +6096,9 @@ static void mlx5_ib_cleanup_multiport_master(struct mlx5_ib_dev *dev)
mlx5_nic_vport_disable_roce(dev->mdev);
}
-static int var_obj_cleanup(struct ib_uobject *uobject,
- enum rdma_remove_reason why,
- struct uverbs_attr_bundle *attrs)
+static int mmap_obj_cleanup(struct ib_uobject *uobject,
+ enum rdma_remove_reason why,
+ struct uverbs_attr_bundle *attrs)
{
struct mlx5_user_mmap_entry *obj = uobject->object;
@@ -6089,6 +6106,16 @@ static int var_obj_cleanup(struct ib_uobject *uobject,
return 0;
}
+static int mlx5_rdma_user_mmap_entry_insert(struct mlx5_ib_ucontext *c,
+ struct mlx5_user_mmap_entry *entry,
+ size_t length)
+{
+ return rdma_user_mmap_entry_insert_range(
+ &c->ibucontext, &entry->rdma_entry, length,
+ (MLX5_IB_MMAP_OFFSET_START << 16),
+ ((MLX5_IB_MMAP_OFFSET_END << 16) + (1UL << 16) - 1));
+}
+
static struct mlx5_user_mmap_entry *
alloc_var_entry(struct mlx5_ib_ucontext *c)
{
@@ -6119,10 +6146,8 @@ alloc_var_entry(struct mlx5_ib_ucontext *c)
entry->page_idx = page_idx;
entry->mmap_flag = MLX5_IB_MMAP_TYPE_VAR;
- err = rdma_user_mmap_entry_insert_range(
- &c->ibucontext, &entry->rdma_entry, var_table->stride_size,
- MLX5_IB_MMAP_OFFSET_START << 16,
- (MLX5_IB_MMAP_OFFSET_END << 16) + (1UL << 16) - 1);
+ err = mlx5_rdma_user_mmap_entry_insert(c, entry,
+ var_table->stride_size);
if (err)
goto err_insert;
@@ -6206,7 +6231,7 @@ DECLARE_UVERBS_NAMED_METHOD_DESTROY(
UA_MANDATORY));
DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_VAR,
- UVERBS_TYPE_ALLOC_IDR(var_obj_cleanup),
+ UVERBS_TYPE_ALLOC_IDR(mmap_obj_cleanup),
&UVERBS_METHOD(MLX5_IB_METHOD_VAR_OBJ_ALLOC),
&UVERBS_METHOD(MLX5_IB_METHOD_VAR_OBJ_DESTROY));
@@ -6218,6 +6243,134 @@ static bool var_is_supported(struct ib_device *device)
MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_NET_Q);
}
+static struct mlx5_user_mmap_entry *
+alloc_uar_entry(struct mlx5_ib_ucontext *c,
+ enum mlx5_ib_uapi_uar_alloc_type alloc_type)
+{
+ struct mlx5_user_mmap_entry *entry;
+ struct mlx5_ib_dev *dev;
+ u32 uar_index;
+ int err;
+
+ entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+ if (!entry)
+ return ERR_PTR(-ENOMEM);
+
+ dev = to_mdev(c->ibucontext.device);
+ err = mlx5_cmd_alloc_uar(dev->mdev, &uar_index);
+ if (err)
+ goto end;
+
+ entry->page_idx = uar_index;
+ entry->address = uar_index2paddress(dev, uar_index);
+ if (alloc_type == MLX5_IB_UAPI_UAR_ALLOC_TYPE_BF)
+ entry->mmap_flag = MLX5_IB_MMAP_TYPE_UAR_WC;
+ else
+ entry->mmap_flag = MLX5_IB_MMAP_TYPE_UAR_NC;
+
+ err = mlx5_rdma_user_mmap_entry_insert(c, entry, PAGE_SIZE);
+ if (err)
+ goto err_insert;
+
+ return entry;
+
+err_insert:
+ mlx5_cmd_free_uar(dev->mdev, uar_index);
+end:
+ kfree(entry);
+ return ERR_PTR(err);
+}
+
+static int UVERBS_HANDLER(MLX5_IB_METHOD_UAR_OBJ_ALLOC)(
+ struct uverbs_attr_bundle *attrs)
+{
+ struct ib_uobject *uobj = uverbs_attr_get_uobject(
+ attrs, MLX5_IB_ATTR_UAR_OBJ_ALLOC_HANDLE);
+ enum mlx5_ib_uapi_uar_alloc_type alloc_type;
+ struct mlx5_ib_ucontext *c;
+ struct mlx5_user_mmap_entry *entry;
+ u64 mmap_offset;
+ u32 length;
+ int err;
+
+ c = to_mucontext(ib_uverbs_get_ucontext(attrs));
+ if (IS_ERR(c))
+ return PTR_ERR(c);
+
+ err = uverbs_get_const(&alloc_type, attrs,
+ MLX5_IB_ATTR_UAR_OBJ_ALLOC_TYPE);
+ if (err)
+ return err;
+
+ if (alloc_type != MLX5_IB_UAPI_UAR_ALLOC_TYPE_BF &&
+ alloc_type != MLX5_IB_UAPI_UAR_ALLOC_TYPE_NC)
+ return -EOPNOTSUPP;
+
+ if (!to_mdev(c->ibucontext.device)->wc_support &&
+ alloc_type == MLX5_IB_UAPI_UAR_ALLOC_TYPE_BF)
+ return -EOPNOTSUPP;
+
+ entry = alloc_uar_entry(c, alloc_type);
+ if (IS_ERR(entry))
+ return PTR_ERR(entry);
+
+ mmap_offset = mlx5_entry_to_mmap_offset(entry);
+ length = entry->rdma_entry.npages * PAGE_SIZE;
+ uobj->object = entry;
+
+ err = uverbs_copy_to(attrs, MLX5_IB_ATTR_UAR_OBJ_ALLOC_MMAP_OFFSET,
+ &mmap_offset, sizeof(mmap_offset));
+ if (err)
+ goto err;
+
+ err = uverbs_copy_to(attrs, MLX5_IB_ATTR_UAR_OBJ_ALLOC_PAGE_ID,
+ &entry->page_idx, sizeof(entry->page_idx));
+ if (err)
+ goto err;
+
+ err = uverbs_copy_to(attrs, MLX5_IB_ATTR_UAR_OBJ_ALLOC_MMAP_LENGTH,
+ &length, sizeof(length));
+ if (err)
+ goto err;
+
+ return 0;
+
+err:
+ rdma_user_mmap_entry_remove(&entry->rdma_entry);
+ return err;
+}
+
+DECLARE_UVERBS_NAMED_METHOD(
+ MLX5_IB_METHOD_UAR_OBJ_ALLOC,
+ UVERBS_ATTR_IDR(MLX5_IB_ATTR_UAR_OBJ_ALLOC_HANDLE,
+ MLX5_IB_OBJECT_UAR,
+ UVERBS_ACCESS_NEW,
+ UA_MANDATORY),
+ UVERBS_ATTR_CONST_IN(MLX5_IB_ATTR_UAR_OBJ_ALLOC_TYPE,
+ enum mlx5_ib_uapi_uar_alloc_type,
+ UA_MANDATORY),
+ UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_UAR_OBJ_ALLOC_PAGE_ID,
+ UVERBS_ATTR_TYPE(u32),
+ UA_MANDATORY),
+ UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_UAR_OBJ_ALLOC_MMAP_LENGTH,
+ UVERBS_ATTR_TYPE(u32),
+ UA_MANDATORY),
+ UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_UAR_OBJ_ALLOC_MMAP_OFFSET,
+ UVERBS_ATTR_TYPE(u64),
+ UA_MANDATORY));
+
+DECLARE_UVERBS_NAMED_METHOD_DESTROY(
+ MLX5_IB_METHOD_UAR_OBJ_DESTROY,
+ UVERBS_ATTR_IDR(MLX5_IB_ATTR_UAR_OBJ_DESTROY_HANDLE,
+ MLX5_IB_OBJECT_UAR,
+ UVERBS_ACCESS_DESTROY,
+ UA_MANDATORY));
+
+DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_UAR,
+ UVERBS_TYPE_ALLOC_IDR(mmap_obj_cleanup),
+ &UVERBS_METHOD(MLX5_IB_METHOD_UAR_OBJ_ALLOC),
+ &UVERBS_METHOD(MLX5_IB_METHOD_UAR_OBJ_DESTROY));
+
ADD_UVERBS_ATTRIBUTES_SIMPLE(
mlx5_ib_dm,
UVERBS_OBJECT_DM,
@@ -6249,6 +6402,7 @@ static const struct uapi_definition mlx5_ib_defs[] = {
UAPI_DEF_CHAIN_OBJ_TREE(UVERBS_OBJECT_DM, &mlx5_ib_dm),
UAPI_DEF_CHAIN_OBJ_TREE_NAMED(MLX5_IB_OBJECT_VAR,
UAPI_DEF_IS_OBJ_SUPPORTED(var_is_supported)),
+ UAPI_DEF_CHAIN_OBJ_TREE_NAMED(MLX5_IB_OBJECT_UAR),
{}
};
@@ -124,6 +124,8 @@ enum {
enum mlx5_ib_mmap_type {
MLX5_IB_MMAP_TYPE_MEMIC = 1,
MLX5_IB_MMAP_TYPE_VAR = 2,
+ MLX5_IB_MMAP_TYPE_UAR_WC = 3,
+ MLX5_IB_MMAP_TYPE_UAR_NC = 4,
};
struct mlx5_ib_ucontext {
@@ -173,7 +173,7 @@ enum uapi_radix_data {
UVERBS_API_OBJ_KEY_BITS = 5,
UVERBS_API_OBJ_KEY_SHIFT =
UVERBS_API_METHOD_KEY_BITS + UVERBS_API_METHOD_KEY_SHIFT,
- UVERBS_API_OBJ_KEY_NUM_CORE = 24,
+ UVERBS_API_OBJ_KEY_NUM_CORE = 20,
UVERBS_API_OBJ_KEY_NUM_DRIVER =
(1 << UVERBS_API_OBJ_KEY_BITS) - UVERBS_API_OBJ_KEY_NUM_CORE,
UVERBS_API_OBJ_KEY_MASK = GENMASK(31, UVERBS_API_OBJ_KEY_SHIFT),
@@ -131,6 +131,23 @@ enum mlx5_ib_var_obj_methods {
MLX5_IB_METHOD_VAR_OBJ_DESTROY,
};
+enum mlx5_ib_uar_alloc_attrs {
+ MLX5_IB_ATTR_UAR_OBJ_ALLOC_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
+ MLX5_IB_ATTR_UAR_OBJ_ALLOC_TYPE,
+ MLX5_IB_ATTR_UAR_OBJ_ALLOC_MMAP_OFFSET,
+ MLX5_IB_ATTR_UAR_OBJ_ALLOC_MMAP_LENGTH,
+ MLX5_IB_ATTR_UAR_OBJ_ALLOC_PAGE_ID,
+};
+
+enum mlx5_ib_uar_obj_destroy_attrs {
+ MLX5_IB_ATTR_UAR_OBJ_DESTROY_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
+};
+
+enum mlx5_ib_uar_obj_methods {
+ MLX5_IB_METHOD_UAR_OBJ_ALLOC = (1U << UVERBS_ID_NS_SHIFT),
+ MLX5_IB_METHOD_UAR_OBJ_DESTROY,
+};
+
enum mlx5_ib_devx_umem_reg_attrs {
MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR,
@@ -190,6 +207,7 @@ enum mlx5_ib_objects {
MLX5_IB_OBJECT_DEVX_ASYNC_EVENT_FD,
MLX5_IB_OBJECT_VAR,
MLX5_IB_OBJECT_PP,
+ MLX5_IB_OBJECT_UAR,
};
enum mlx5_ib_flow_matcher_create_attrs {
@@ -77,5 +77,10 @@ enum mlx5_ib_uapi_pp_alloc_flags {
MLX5_IB_UAPI_PP_ALLOC_FLAGS_DEDICATED_INDEX = 1 << 0,
};
+enum mlx5_ib_uapi_uar_alloc_type {
+ MLX5_IB_UAPI_UAR_ALLOC_TYPE_BF = 0x0,
+ MLX5_IB_UAPI_UAR_ALLOC_TYPE_NC = 0x1,
+};
+
#endif