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authorTomer Tayar <ttayar@habana.ai>2019-06-03 11:25:04 +0000
committerOded Gabbay <oded.gabbay@gmail.com>2019-06-03 11:25:04 +0000
commite4c814aa7105a6a8320f64ecc48f13bc089eea88 (patch)
tree4880cc9e08c03141bc3d0eccf8f6c3ed0ee4049b /drivers/misc
parentd724170160f800fa8dfd3c0cdebb8b093570b504 (diff)
habanalabs: Fix virtual address access via debugfs for 2MB pages
The debugfs interface for accessing DRAM virtual addresses currently uses the 12 LSBs of a virtual address as an offset. However, it should use the 20 LSBs in case the device MMU page size is 2MB instead of 4KB. This patch fixes the offset calculation to be based on the page size. Signed-off-by: Tomer Tayar <ttayar@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/habanalabs/debugfs.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/misc/habanalabs/debugfs.c b/drivers/misc/habanalabs/debugfs.c
index 0ce5621c1324..ba418aaa404c 100644
--- a/drivers/misc/habanalabs/debugfs.c
+++ b/drivers/misc/habanalabs/debugfs.c
@@ -500,6 +500,7 @@ static int device_va_to_pa(struct hl_device *hdev, u64 virt_addr,
{
struct hl_ctx *ctx = hdev->user_ctx;
u64 hop_addr, hop_pte_addr, hop_pte;
+ u64 offset_mask = HOP4_MASK | OFFSET_MASK;
int rc = 0;
if (!ctx) {
@@ -542,12 +543,14 @@ static int device_va_to_pa(struct hl_device *hdev, u64 virt_addr,
goto not_mapped;
hop_pte_addr = get_hop4_pte_addr(ctx, hop_addr, virt_addr);
hop_pte = hdev->asic_funcs->read_pte(hdev, hop_pte_addr);
+
+ offset_mask = OFFSET_MASK;
}
if (!(hop_pte & PAGE_PRESENT_MASK))
goto not_mapped;
- *phys_addr = (hop_pte & PTE_PHYS_ADDR_MASK) | (virt_addr & OFFSET_MASK);
+ *phys_addr = (hop_pte & ~offset_mask) | (virt_addr & offset_mask);
goto out;