All we need are a pages array, pin_user_pages_fast can give us that
directly. Plus this avoids the entire raw pfn side of get_vaddr_frames.
Note that pin_user_pages_fast is a safe replacement despite the
seeming lack of checking for vma->vm_flasg & (VM_IO | VM_PFNMAP). Such
ptes are marked with pte_mkspecial (which pup_fast rejects in the
fastpath), and only architectures supporting that support the
pin_user_pages_fast fastpath.
Reviewed-by: John Hubbard <jhubb...@nvidia.com>
Reviewed-by: Oded Gabbay <ogab...@kernel.org>
Signed-off-by: Daniel Vetter <daniel.vet...@intel.com>
Cc: Christoph Hellwig <h...@infradead.org>
Cc: Jason Gunthorpe <j...@ziepe.ca>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: John Hubbard <jhubb...@nvidia.com>
Cc: Jérôme Glisse <jgli...@redhat.com>
Cc: Jan Kara <j...@suse.cz>
Cc: Dan Williams <dan.j.willi...@intel.com>
Cc: linux...@kvack.org
Cc: linux-arm-ker...@lists.infradead.org
Cc: linux-samsung-...@vger.kernel.org
Cc: linux-me...@vger.kernel.org
Cc: Oded Gabbay <oded.gab...@gmail.com>
Cc: Omer Shpigelman <oshpigel...@habana.ai>
Cc: Ofir Bitton <obit...@habana.ai>
Cc: Tomer Tayar <tta...@habana.ai>
Cc: Moti Haimovski <mhaimov...@habana.ai>
Cc: Daniel Vetter <daniel.vet...@ffwll.ch>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Cc: Pawel Piskorski <ppiskor...@habana.ai>
Signed-off-by: Daniel Vetter <daniel.vet...@ffwll.ch>
--
v2: Use unpin_user_pages_dirty_lock (John)
v3: Update kerneldoc (Oded)
v6: Explain why pup_fast is safe, after discussions with John and
Christoph.
v7: Remove error message for kmalloc failures, habanalabs doesn't do
that (Oded)
---
drivers/misc/habanalabs/Kconfig | 1 -
drivers/misc/habanalabs/common/habanalabs.h | 6 ++-
drivers/misc/habanalabs/common/memory.c | 51 ++++++++-------------
3 files changed, 22 insertions(+), 36 deletions(-)
diff --git a/drivers/misc/habanalabs/Kconfig b/drivers/misc/habanalabs/Kconfig
index 1640340d3e62..293d79811372 100644
--- a/drivers/misc/habanalabs/Kconfig
+++ b/drivers/misc/habanalabs/Kconfig
@@ -6,7 +6,6 @@
config HABANA_AI
tristate "HabanaAI accelerators (habanalabs)"
depends on PCI && HAS_IOMEM
- select FRAME_VECTOR
select GENERIC_ALLOCATOR
select HWMON
help
diff --git a/drivers/misc/habanalabs/common/habanalabs.h
b/drivers/misc/habanalabs/common/habanalabs.h
index 6ed974d2def0..107442a20197 100644
--- a/drivers/misc/habanalabs/common/habanalabs.h
+++ b/drivers/misc/habanalabs/common/habanalabs.h
@@ -921,7 +921,8 @@ struct hl_ctx_mgr {
* struct hl_userptr - memory mapping chunk information
* @vm_type: type of the VM.
* @job_node: linked-list node for hanging the object on the Job's list.
- * @vec: pointer to the frame vector.
+ * @pages: pointer to struct page array
+ * @npages: size of @pages array
* @sgt: pointer to the scatter-gather table that holds the pages.
* @dir: for DMA unmapping, the direction must be supplied, so save it.
* @debugfs_list: node in debugfs list of command submissions.
@@ -932,7 +933,8 @@ struct hl_ctx_mgr {
struct hl_userptr {
enum vm_type_t vm_type; /* must be first */
struct list_head job_node;
- struct frame_vector *vec;
+ struct page **pages;
+ unsigned int npages;
struct sg_table *sgt;
enum dma_data_direction dir;
struct list_head debugfs_list;
diff --git a/drivers/misc/habanalabs/common/memory.c
b/drivers/misc/habanalabs/common/memory.c
index 84227819e4d1..2c59fa869684 100644
--- a/drivers/misc/habanalabs/common/memory.c
+++ b/drivers/misc/habanalabs/common/memory.c
@@ -1291,45 +1291,39 @@ static int get_user_memory(struct hl_device *hdev, u64
addr, u64 size,
return -EFAULT;
}
- userptr->vec = frame_vector_create(npages);
- if (!userptr->vec) {
- dev_err(hdev->dev, "Failed to create frame vector\n");
+ userptr->pages = kvmalloc_array(npages, sizeof(*userptr->pages),
+ GFP_KERNEL);
+ if (!userptr->pages)
return -ENOMEM;
- }
- rc = get_vaddr_frames(start, npages, FOLL_FORCE | FOLL_WRITE,
- userptr->vec);
+ rc = pin_user_pages_fast(start, npages, FOLL_FORCE | FOLL_WRITE,
+ userptr->pages);
if (rc != npages) {
dev_err(hdev->dev,
"Failed to map host memory, user ptr probably wrong\n");
if (rc < 0)
- goto destroy_framevec;
- rc = -EFAULT;
- goto put_framevec;
- }
-
- if (frame_vector_to_pages(userptr->vec) < 0) {
- dev_err(hdev->dev,
- "Failed to translate frame vector to pages\n");
+ goto destroy_pages;
+ npages = rc;
rc = -EFAULT;
- goto put_framevec;
+ goto put_pages;
}
+ userptr->npages = npages;
rc = sg_alloc_table_from_pages(userptr->sgt,
- frame_vector_pages(userptr->vec),
- npages, offset, size, GFP_ATOMIC);
+ userptr->pages,
+ npages, offset, size, GFP_ATOMIC);
if (rc < 0) {
dev_err(hdev->dev, "failed to create SG table from pages\n");
- goto put_framevec;
+ goto put_pages;
}
return 0;
-put_framevec:
- put_vaddr_frames(userptr->vec);
-destroy_framevec:
- frame_vector_destroy(userptr->vec);
+put_pages:
+ unpin_user_pages(userptr->pages, npages);
+destroy_pages:
+ kvfree(userptr->pages);
return rc;
}
@@ -1415,8 +1409,6 @@ int hl_pin_host_memory(struct hl_device *hdev, u64 addr,
u64 size,
*/
void hl_unpin_host_memory(struct hl_device *hdev, struct hl_userptr *userptr)
{
- struct page **pages;
-
hl_debugfs_remove_userptr(hdev, userptr);
if (userptr->dma_mapped)
@@ -1424,15 +1416,8 @@ void hl_unpin_host_memory(struct hl_device *hdev, struct
hl_userptr *userptr)
userptr->sgt->nents,
userptr->dir);
- pages = frame_vector_pages(userptr->vec);
- if (!IS_ERR(pages)) {
- int i;
-
- for (i = 0; i < frame_vector_count(userptr->vec); i++)
- set_page_dirty_lock(pages[i]);
- }
- put_vaddr_frames(userptr->vec);
- frame_vector_destroy(userptr->vec);
+ unpin_user_pages_dirty_lock(userptr->pages, userptr->npages, true);
+ kvfree(userptr->pages);
list_del(&userptr->job_node);
--
2.29.2
