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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.c100
1 files changed, 70 insertions, 30 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
index 618e469e3622..423fd2eebe1e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
@@ -47,35 +47,37 @@
/* 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;
}
@@ -87,8 +89,9 @@ static bool check_atom_bios(uint8_t *bios, size_t size)
* 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.
*/
-static bool igp_read_bios_from_vram(struct amdgpu_device *adev)
+static bool amdgpu_read_bios_from_vram(struct amdgpu_device *adev)
{
uint8_t __iomem *bios;
resource_size_t vram_base;
@@ -117,7 +120,7 @@ static bool igp_read_bios_from_vram(struct amdgpu_device *adev)
memcpy_fromio(adev->bios, bios, size);
iounmap(bios);
- if (!check_atom_bios(adev->bios, size)) {
+ if (!check_atom_bios(adev, size)) {
kfree(adev->bios);
return false;
}
@@ -145,7 +148,7 @@ 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)) {
+ if (!check_atom_bios(adev, size)) {
kfree(adev->bios);
return false;
}
@@ -185,7 +188,7 @@ 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)) {
+ if (!check_atom_bios(adev, len)) {
kfree(adev->bios);
return false;
}
@@ -215,7 +218,7 @@ 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;
@@ -284,10 +287,6 @@ static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
acpi_status status;
bool found = false;
- /* ATRM is for the discrete card only */
- if (adev->flags & AMD_IS_APU)
- return false;
-
/* ATRM is for on-platform devices only */
if (dev_is_removable(&adev->pdev->dev))
return false;
@@ -327,7 +326,7 @@ static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
break;
}
- if (!check_atom_bios(adev->bios, size)) {
+ if (!check_atom_bios(adev, size)) {
kfree(adev->bios);
return false;
}
@@ -343,11 +342,8 @@ static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev)
{
- if (adev->flags & AMD_IS_APU)
- return igp_read_bios_from_vram(adev);
- else
- return (!adev->asic_funcs || !adev->asic_funcs->read_disabled_bios) ?
- false : amdgpu_asic_read_disabled_bios(adev);
+ return (!adev->asic_funcs || !adev->asic_funcs->read_disabled_bios) ?
+ false : amdgpu_asic_read_disabled_bios(adev);
}
#ifdef CONFIG_ACPI
@@ -395,7 +391,7 @@ static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
vhdr->ImageLength,
GFP_KERNEL);
- if (!check_atom_bios(adev->bios, vhdr->ImageLength)) {
+ if (!check_atom_bios(adev, vhdr->ImageLength)) {
kfree(adev->bios);
return false;
}
@@ -414,7 +410,36 @@ static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
}
#endif
-bool amdgpu_get_bios(struct amdgpu_device *adev)
+static bool amdgpu_get_bios_apu(struct amdgpu_device *adev)
+{
+ if (amdgpu_acpi_vfct_bios(adev)) {
+ dev_info(adev->dev, "Fetched VBIOS from VFCT\n");
+ goto success;
+ }
+
+ if (amdgpu_read_bios_from_vram(adev)) {
+ dev_info(adev->dev, "Fetched VBIOS from VRAM 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;
+ }
+
+ dev_err(adev->dev, "Unable to locate a BIOS ROM\n");
+ return false;
+
+success:
+ return true;
+}
+
+static bool amdgpu_get_bios_dgpu(struct amdgpu_device *adev)
{
if (amdgpu_atrm_get_bios(adev)) {
dev_info(adev->dev, "Fetched VBIOS from ATRM\n");
@@ -426,11 +451,17 @@ bool amdgpu_get_bios(struct amdgpu_device *adev)
goto success;
}
- if (igp_read_bios_from_vram(adev)) {
+ /* this is required for SR-IOV */
+ if (amdgpu_read_bios_from_vram(adev)) {
dev_info(adev->dev, "Fetched VBIOS from VRAM BAR\n");
goto success;
}
+ 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;
@@ -446,19 +477,28 @@ bool amdgpu_get_bios(struct amdgpu_device *adev)
goto success;
}
- if (amdgpu_read_platform_bios(adev)) {
- dev_info(adev->dev, "Fetched VBIOS from platform\n");
- goto success;
- }
-
dev_err(adev->dev, "Unable to locate a BIOS ROM\n");
return false;
success:
- adev->is_atom_fw = adev->asic_type >= CHIP_VEGA10;
return true;
}
+bool amdgpu_get_bios(struct amdgpu_device *adev)
+{
+ bool found;
+
+ if (adev->flags & AMD_IS_APU)
+ found = amdgpu_get_bios_apu(adev);
+ else
+ found = amdgpu_get_bios_dgpu(adev);
+
+ if (found)
+ adev->is_atom_fw = adev->asic_type >= CHIP_VEGA10;
+
+ return found;
+}
+
/* helper function for soc15 and onwards to read bios from rom */
bool amdgpu_soc15_read_bios_from_rom(struct amdgpu_device *adev,
u8 *bios, u32 length_bytes)
generated by cgit (git 2.34.1) at 2025-07-24 23:20:45 +0000