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drm/xe/vram: Use PCI rebar helpers in resize_vram_bar()

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PCI core provides pci_rebar_size_supported() and pci_rebar_size_to_bytes();
use them in resize_vram_bar() to simplify code.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patch.msgid.link/20251113180053.27944-8-ilpo.jarvinen@linux.intel.com
This commit is contained in:
Ilpo Järvinen 2025-11-13 20:00:49 +02:00 committed by Bjorn Helgaas
parent c59038d3c0
commit 2987a64de3
1 changed files with 7 additions and 12 deletions
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19
drivers/gpu/drm/xe/xe_vram.c
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@ -24,8 +24,6 @@
#include "xe_vram.h"
#include "xe_vram_types.h"
#define BAR_SIZE_SHIFT 20
static void
_resize_bar(struct xe_device *xe, int resno, resource_size_t size)
{
@ -71,25 +69,22 @@ static void resize_vram_bar(struct xe_device *xe)
/* set to a specific size? */
if (force_vram_bar_size) {
u32 bar_size_bit;
rebar_size = pci_rebar_bytes_to_size(force_vram_bar_size *
(resource_size_t)SZ_1M);
rebar_size = force_vram_bar_size * (resource_size_t)SZ_1M;
bar_size_bit = bar_size_mask & BIT(pci_rebar_bytes_to_size(rebar_size));
if (!bar_size_bit) {
if (!pci_rebar_size_supported(pdev, LMEM_BAR, rebar_size)) {
drm_info(&xe->drm,
"Requested size: %lluMiB is not supported by rebar sizes: 0x%x. Leaving default: %lluMiB\n",
(u64)rebar_size >> 20, bar_size_mask, (u64)current_size >> 20);
(u64)pci_rebar_size_to_bytes(rebar_size) >> 20,
bar_size_mask, (u64)current_size >> 20);
return;
}
rebar_size = 1ULL << (__fls(bar_size_bit) + BAR_SIZE_SHIFT);
rebar_size = pci_rebar_size_to_bytes(rebar_size);
if (rebar_size == current_size)
return;
} else {
rebar_size = 1ULL << (__fls(bar_size_mask) + BAR_SIZE_SHIFT);
rebar_size = pci_rebar_size_to_bytes(__fls(bar_size_mask));
/* only resize if larger than current */
if (rebar_size <= current_size)