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drm/amdgpu: Basic emulation support 

Add amdgpu_emu_mode module parameter to control the emulation mode
Avoid vbios operation on emulation since there is no vbios post duirng emulation,
use the common hw_init to simulate the post

Signed-off-by: Shaoyun Liu <Shaoyun.Liu@amd.com>
Acked-By: Alex Deucher <alexander.deucher@amd.com>
Acked-By: Christian Konig <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Shaoyun Liu 2018-02-01 17:37:50 -05:00 committed by Alex Deucher
parent 6c24a85d23
commit bfca028927
3 changed files with 28 additions and 3 deletions
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1
drivers/gpu/drm/amd/amdgpu/amdgpu.h
View File

@ -128,6 +128,7 @@ extern int amdgpu_job_hang_limit;
extern int amdgpu_lbpw;
extern int amdgpu_compute_multipipe;
extern int amdgpu_gpu_recovery;
extern int amdgpu_emu_mode;
#ifdef CONFIG_DRM_AMDGPU_SI
extern int amdgpu_si_support;

26
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
View File

@ -1310,6 +1310,20 @@ static int amdgpu_device_ip_init(struct amdgpu_device *adev)
return r;
}
adev->ip_blocks[i].status.sw = true;
if (amdgpu_emu_mode == 1) {
/* Need to do common hw init first on emulation */
if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_COMMON) {
r = adev->ip_blocks[i].version->funcs->hw_init((void *)adev);
if (r) {
DRM_ERROR("hw_init of IP block <%s> failed %d\n",
adev->ip_blocks[i].version->funcs->name, r);
return r;
}
adev->ip_blocks[i].status.hw = true;
}
}
/* need to do gmc hw init early so we can allocate gpu mem */
if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GMC) {
r = amdgpu_device_vram_scratch_init(adev);
@ -1343,8 +1357,7 @@ static int amdgpu_device_ip_init(struct amdgpu_device *adev)
for (i = 0; i < adev->num_ip_blocks; i++) {
if (!adev->ip_blocks[i].status.sw)
continue;
/* gmc hw init is done early */
if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GMC)
if (adev->ip_blocks[i].status.hw)
continue;
r = adev->ip_blocks[i].version->funcs->hw_init((void *)adev);
if (r) {
@ -1884,6 +1897,9 @@ int amdgpu_device_init(struct amdgpu_device *adev,
if (runtime)
vga_switcheroo_init_domain_pm_ops(adev->dev, &adev->vga_pm_domain);
if (amdgpu_emu_mode == 1)
goto fence_driver_init;
/* Read BIOS */
if (!amdgpu_get_bios(adev)) {
r = -EINVAL;
@ -1936,6 +1952,7 @@ int amdgpu_device_init(struct amdgpu_device *adev,
amdgpu_atombios_i2c_init(adev);
}
fence_driver_init:
/* Fence driver */
r = amdgpu_fence_driver_init(adev);
if (r) {
@ -2078,7 +2095,10 @@ void amdgpu_device_fini(struct amdgpu_device *adev)
/* free i2c buses */
if (!amdgpu_device_has_dc_support(adev))
amdgpu_i2c_fini(adev);
amdgpu_atombios_fini(adev);
if (amdgpu_emu_mode != 1)
amdgpu_atombios_fini(adev);
kfree(adev->bios);
adev->bios = NULL;
if (!pci_is_thunderbolt_attached(adev->pdev))

4
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
View File

@ -131,6 +131,7 @@ int amdgpu_job_hang_limit = 0;
int amdgpu_lbpw = -1;
int amdgpu_compute_multipipe = -1;
int amdgpu_gpu_recovery = -1; /* auto */
int amdgpu_emu_mode = 0;
MODULE_PARM_DESC(vramlimit, "Restrict VRAM for testing, in megabytes");
module_param_named(vramlimit, amdgpu_vram_limit, int, 0600);
@ -286,6 +287,9 @@ module_param_named(compute_multipipe, amdgpu_compute_multipipe, int, 0444);
MODULE_PARM_DESC(gpu_recovery, "Enable GPU recovery mechanism, (1 = enable, 0 = disable, -1 = auto");
module_param_named(gpu_recovery, amdgpu_gpu_recovery, int, 0444);
MODULE_PARM_DESC(emu_mode, "Emulation mode, (1 = enable, 0 = disable");
module_param_named(emu_mode, amdgpu_emu_mode, int, 0444);
#ifdef CONFIG_DRM_AMDGPU_SI
#if defined(CONFIG_DRM_RADEON) || defined(CONFIG_DRM_RADEON_MODULE)