korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-11 21:14:07 +08:00
Code Issues Packages Projects Releases Wiki Activity

drm/amdgpu: Resize BAR0 to the maximum available size, even if it doesn't cover VRAM

Browse Source 
This allows BAR0 resizing to be done for cards which don't advertise
support for a size large enough to cover the VRAM but which do
advertise at least one size larger than the default. For example,
my RX 5600 XT, which advertises 256MB, 512MB and 1GB.

Signed-off-by: Darren Salt <devspam@moreofthesa.me.uk>
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
Reviewed-by: Nirmoy Das <nirmoy.das@amd.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20210107175017.15893-4-nirmoy.das@amd.com
This commit is contained in:
Nirmoy Das 2021-01-07 15:15:10 +01:00 committed by Christian König
parent 907830b0fc
commit 453f617a30
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
View File

@ -1107,7 +1107,7 @@ void amdgpu_device_wb_free(struct amdgpu_device *adev, u32 wb)
int amdgpu_device_resize_fb_bar(struct amdgpu_device *adev)
{
u64 space_needed = roundup_pow_of_two(adev->gmc.real_vram_size);
u32 rbar_size = order_base_2(((space_needed >> 20) | 1)) - 1;
int rbar_size = pci_rebar_bytes_to_size(adev->gmc.real_vram_size);
struct pci_bus *root;
struct resource *res;
unsigned i;
@ -1138,6 +1138,10 @@ int amdgpu_device_resize_fb_bar(struct amdgpu_device *adev)
if (!res)
return 0;
/* Limit the BAR size to what is available */
rbar_size = min(fls(pci_rebar_get_possible_sizes(adev->pdev, 0)) - 1,
rbar_size);
/* Disable memory decoding while we change the BAR addresses and size */
pci_read_config_word(adev->pdev, PCI_COMMAND, &cmd);
pci_write_config_word(adev->pdev, PCI_COMMAND,