diff options
| author | Felix Kuehling <Felix.Kuehling@amd.com> | 2018-03-15 17:27:53 -0400 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2018-03-15 17:27:53 -0400 |
| commit | 374200b154ae48e8f011fb74dab21f80459f9e47 (patch) | |
| tree | d801c957febe2b211b23486e26d139d636535034 /drivers/gpu | |
| parent | 0fc8011f89feb8b2c3008583b777d097e1974660 (diff) | |
drm/amdkfd: Add module option for testing large-BAR functionality
Simulate large-BAR system by exporting only visible memory. This
limits the amount of available VRAM to the size of the BAR, but
enables CPU access to VRAM.
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_module.c | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 6 |
4 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c index ec0b2c0284ec..cd679cf1fd30 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -1151,6 +1151,11 @@ bool kfd_dev_is_large_bar(struct kfd_dev *dev) { struct kfd_local_mem_info mem_info; + if (debug_largebar) { + pr_debug("Simulate large-bar allocation on non large-bar machine\n"); + return true; + } + if (dev->device_info->needs_iommu_device) return false; diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c index d85112224f1d..4f126ef6139b 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c @@ -1117,6 +1117,9 @@ static int kfd_create_vcrat_image_gpu(void *pcrat_image, sub_type_hdr = (typeof(sub_type_hdr))((char *)sub_type_hdr + sub_type_hdr->length); + if (debug_largebar) + local_mem_info.local_mem_size_private = 0; + if (local_mem_info.local_mem_size_private == 0) ret = kfd_fill_gpu_memory_affinity(&avail_size, kdev, HSA_MEM_HEAP_TYPE_FB_PUBLIC, diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_module.c b/drivers/gpu/drm/amd/amdkfd/kfd_module.c index 65574c6a10b3..b0acb0603883 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_module.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_module.c @@ -71,6 +71,11 @@ module_param(send_sigterm, int, 0444); MODULE_PARM_DESC(send_sigterm, "Send sigterm to HSA process on unhandled exception (0 = disable, 1 = enable)"); +int debug_largebar; +module_param(debug_largebar, int, 0444); +MODULE_PARM_DESC(debug_largebar, + "Debug large-bar flag used to simulate large-bar capability on non-large bar machine (0 = disable, 1 = enable)"); + int ignore_crat; module_param(ignore_crat, int, 0444); MODULE_PARM_DESC(ignore_crat, diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h index aa9386356587..db27f9f13696 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h @@ -105,6 +105,12 @@ extern int cwsr_enable; extern int send_sigterm; /* + * This kernel module is used to simulate large bar machine on non-large bar + * enabled machines. + */ +extern int debug_largebar; + +/* * Ignore CRAT table during KFD initialization, can be used to work around * broken CRAT tables on some AMD systems */ |