Commit d0df8a35 authored by Tomer Tayar's avatar Tomer Tayar Committed by Oded Gabbay
Browse files

accel/habanalabs: fix DRAM BAR base address calculation 



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: default avatarTomer Tayar <ttayar@habana.ai>
Reviewed-by: default avatarOded Gabbay <ogabbay@kernel.org>
Signed-off-by: default avatarOded Gabbay <ogabbay@kernel.org>
parent 8c075401

drivers/accel/habanalabs/common/device.c

+2 −1
Original line number Diff line number Diff line
@@ -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);