From: Shaoyun Liu Date: Thu, 1 Feb 2018 17:37:50 -0500 Subject: drm/amdgpu: Basic emulation support Git-commit: bfca02892773d2702aeeec9a290cf99464c3c0c1 Patch-mainline: v4.17-rc1 References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166 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 Acked-By: Alex Deucher Acked-By: Christian Konig Signed-off-by: Alex Deucher Acked-by: Petr Tesarik --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 + drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 26 +++++++++++++++++++++++--- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 4 ++++ 3 files changed, 28 insertions(+), 3 deletions(-) --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -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; --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -1311,6 +1311,20 @@ static int amdgpu_device_ip_init(struct 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); @@ -1344,8 +1358,7 @@ static int amdgpu_device_ip_init(struct 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) { @@ -1887,6 +1900,9 @@ int amdgpu_device_init(struct amdgpu_dev 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; @@ -1939,6 +1955,7 @@ int amdgpu_device_init(struct amdgpu_dev amdgpu_atombios_i2c_init(adev); } +fence_driver_init: /* Fence driver */ r = amdgpu_fence_driver_init(adev); if (r) { @@ -2084,7 +2101,10 @@ void amdgpu_device_fini(struct amdgpu_de /* 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)) --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -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, am 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)