diff mbox series

[4/6] accel/habanalabs: fix DRAM BAR base address calculation

Message ID 20240102150654.522555-4-ogabbay@kernel.org (mailing list archive)
State New, archived
Headers show
Series [1/6] accel/habanalabs: check failure of eventfd_signal | expand

Commit Message

Oded Gabbay Jan. 2, 2024, 3:06 p.m. UTC 
From: Tomer Tayar <ttayar@habana.ai>

When the DRAM region size in the BAR is not a power of 2, calculating
the corresponding BAR base address should be done using the offset from
the DRAM start address, and not using directly the DRAM address.

Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
---
 drivers/accel/habanalabs/common/device.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/accel/habanalabs/common/device.c b/drivers/accel/habanalabs/common/device.c
index 514459396818..15891de6cf39 100644
--- a/drivers/accel/habanalabs/common/device.c
+++ b/drivers/accel/habanalabs/common/device.c
@@ -55,7 +55,8 @@  static u64 hl_set_dram_bar(struct hl_device *hdev, u64 addr, struct pci_mem_regi
 	if (is_power_of_2(prop->dram_pci_bar_size))
 		bar_base_addr = addr & ~(prop->dram_pci_bar_size - 0x1ull);
 	else
-		bar_base_addr = DIV_ROUND_DOWN_ULL(addr, prop->dram_pci_bar_size) *
+		bar_base_addr = region->region_base +
+				div64_u64((addr - region->region_base), prop->dram_pci_bar_size) *
 				prop->dram_pci_bar_size;
 
 	old_base = hdev->asic_funcs->set_dram_bar_base(hdev, bar_base_addr);