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path: root/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
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Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c')
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c116
1 files changed, 81 insertions, 35 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
index 45affc02548c..35d04e69aec0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
@@ -47,53 +47,63 @@
/* Check if current bios is an ATOM BIOS.
* Return true if it is ATOM BIOS. Otherwise, return false.
*/
-static bool check_atom_bios(uint8_t *bios, size_t size)
+static bool check_atom_bios(struct amdgpu_device *adev, size_t size)
{
uint16_t tmp, bios_header_start;
+ uint8_t *bios = adev->bios;
if (!bios || size < 0x49) {
- DRM_INFO("vbios mem is null or mem size is wrong\n");
+ dev_dbg(adev->dev, "VBIOS mem is null or mem size is wrong\n");
return false;
}
if (!AMD_IS_VALID_VBIOS(bios)) {
- DRM_INFO("BIOS signature incorrect %x %x\n", bios[0], bios[1]);
+ dev_dbg(adev->dev, "VBIOS signature incorrect %x %x\n", bios[0],
+ bios[1]);
return false;
}
bios_header_start = bios[0x48] | (bios[0x49] << 8);
if (!bios_header_start) {
- DRM_INFO("Can't locate bios header\n");
+ dev_dbg(adev->dev, "Can't locate VBIOS header\n");
return false;
}
tmp = bios_header_start + 4;
if (size < tmp) {
- DRM_INFO("BIOS header is broken\n");
+ dev_dbg(adev->dev, "VBIOS header is broken\n");
return false;
}
if (!memcmp(bios + tmp, "ATOM", 4) ||
!memcmp(bios + tmp, "MOTA", 4)) {
- DRM_DEBUG("ATOMBIOS detected\n");
+ dev_dbg(adev->dev, "ATOMBIOS detected\n");
return true;
}
return false;
}
+void amdgpu_bios_release(struct amdgpu_device *adev)
+{
+ kfree(adev->bios);
+ adev->bios = NULL;
+ adev->bios_size = 0;
+}
+
/* If you boot an IGP board with a discrete card as the primary,
* the IGP rom is not accessible via the rom bar as the IGP rom is
* part of the system bios. On boot, the system bios puts a
* copy of the igp rom at the start of vram if a discrete card is
* present.
- * For SR-IOV, the vbios image is also put in VRAM in the VF.
+ * For SR-IOV, if dynamic critical region is not enabled,
+ * the vbios image is also put at the start of VRAM in the VF.
*/
static bool amdgpu_read_bios_from_vram(struct amdgpu_device *adev)
{
- uint8_t __iomem *bios;
+ uint8_t __iomem *bios = NULL;
resource_size_t vram_base;
- resource_size_t size = 256 * 1024; /* ??? */
+ u32 size = 256U * 1024U; /* ??? */
if (!(adev->flags & AMD_IS_APU))
if (amdgpu_device_need_post(adev))
@@ -105,21 +115,36 @@ static bool amdgpu_read_bios_from_vram(struct amdgpu_device *adev)
adev->bios = NULL;
vram_base = pci_resource_start(adev->pdev, 0);
- bios = ioremap_wc(vram_base, size);
- if (!bios)
- return false;
adev->bios = kmalloc(size, GFP_KERNEL);
- if (!adev->bios) {
- iounmap(bios);
+ if (!adev->bios)
return false;
+
+ /* For SRIOV with dynamic critical region is enabled,
+ * the vbios image is put at a dynamic offset of VRAM in the VF.
+ * If dynamic critical region is disabled, follow the existing logic as on baremetal.
+ */
+ if (amdgpu_sriov_vf(adev) && adev->virt.is_dynamic_crit_regn_enabled) {
+ if (amdgpu_virt_get_dynamic_data_info(adev,
+ AMD_SRIOV_MSG_VBIOS_IMG_TABLE_ID, adev->bios, &size)) {
+ amdgpu_bios_release(adev);
+ return false;
+ }
+ } else {
+ bios = ioremap_wc(vram_base, size);
+ if (!bios) {
+ amdgpu_bios_release(adev);
+ return false;
+ }
+
+ memcpy_fromio(adev->bios, bios, size);
+ iounmap(bios);
}
+
adev->bios_size = size;
- memcpy_fromio(adev->bios, bios, size);
- iounmap(bios);
- if (!check_atom_bios(adev->bios, size)) {
- kfree(adev->bios);
+ if (!check_atom_bios(adev, size)) {
+ amdgpu_bios_release(adev);
return false;
}
@@ -146,8 +171,8 @@ bool amdgpu_read_bios(struct amdgpu_device *adev)
memcpy_fromio(adev->bios, bios, size);
pci_unmap_rom(adev->pdev, bios);
- if (!check_atom_bios(adev->bios, size)) {
- kfree(adev->bios);
+ if (!check_atom_bios(adev, size)) {
+ amdgpu_bios_release(adev);
return false;
}
@@ -186,8 +211,8 @@ static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev)
/* read complete BIOS */
amdgpu_asic_read_bios_from_rom(adev, adev->bios, len);
- if (!check_atom_bios(adev->bios, len)) {
- kfree(adev->bios);
+ if (!check_atom_bios(adev, len)) {
+ amdgpu_bios_release(adev);
return false;
}
@@ -216,14 +241,15 @@ static bool amdgpu_read_platform_bios(struct amdgpu_device *adev)
memcpy_fromio(adev->bios, bios, romlen);
iounmap(bios);
- if (!check_atom_bios(adev->bios, romlen))
+ if (!check_atom_bios(adev, romlen))
goto free_bios;
adev->bios_size = romlen;
return true;
free_bios:
- kfree(adev->bios);
+ amdgpu_bios_release(adev);
+
return false;
}
@@ -324,8 +350,8 @@ static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
break;
}
- if (!check_atom_bios(adev->bios, size)) {
- kfree(adev->bios);
+ if (!check_atom_bios(adev, size)) {
+ amdgpu_bios_release(adev);
return false;
}
adev->bios_size = size;
@@ -389,8 +415,8 @@ static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
vhdr->ImageLength,
GFP_KERNEL);
- if (!check_atom_bios(adev->bios, vhdr->ImageLength)) {
- kfree(adev->bios);
+ if (!check_atom_bios(adev, vhdr->ImageLength)) {
+ amdgpu_bios_release(adev);
return false;
}
adev->bios_size = vhdr->ImageLength;
@@ -437,6 +463,13 @@ success:
return true;
}
+static bool amdgpu_prefer_rom_resource(struct amdgpu_device *adev)
+{
+ struct resource *res = &adev->pdev->resource[PCI_ROM_RESOURCE];
+
+ return (res->flags & IORESOURCE_ROM_SHADOW);
+}
+
static bool amdgpu_get_bios_dgpu(struct amdgpu_device *adev)
{
if (amdgpu_atrm_get_bios(adev)) {
@@ -455,14 +488,27 @@ static bool amdgpu_get_bios_dgpu(struct amdgpu_device *adev)
goto success;
}
- if (amdgpu_read_platform_bios(adev)) {
- dev_info(adev->dev, "Fetched VBIOS from platform\n");
- goto success;
- }
+ if (amdgpu_prefer_rom_resource(adev)) {
+ if (amdgpu_read_bios(adev)) {
+ dev_info(adev->dev, "Fetched VBIOS from ROM BAR\n");
+ goto success;
+ }
- if (amdgpu_read_bios(adev)) {
- dev_info(adev->dev, "Fetched VBIOS from ROM BAR\n");
- goto success;
+ if (amdgpu_read_platform_bios(adev)) {
+ dev_info(adev->dev, "Fetched VBIOS from platform\n");
+ goto success;
+ }
+
+ } else {
+ if (amdgpu_read_platform_bios(adev)) {
+ dev_info(adev->dev, "Fetched VBIOS from platform\n");
+ goto success;
+ }
+
+ if (amdgpu_read_bios(adev)) {
+ dev_info(adev->dev, "Fetched VBIOS from ROM BAR\n");
+ goto success;
+ }
}
if (amdgpu_read_bios_from_rom(adev)) {
generated by cgit (git 2.34.1) at 2025-12-22 10:28:06 +0000