diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2001-drm-amd-doc-Add-XGMI-sysfs-documentation.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2001-drm-amd-doc-Add-XGMI-sysfs-documentation.patch | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2001-drm-amd-doc-Add-XGMI-sysfs-documentation.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2001-drm-amd-doc-Add-XGMI-sysfs-documentation.patch new file mode 100644 index 00000000..382c81c6 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2001-drm-amd-doc-Add-XGMI-sysfs-documentation.patch @@ -0,0 +1,76 @@ +From b403866cadecca555afe2287bfcb03f42b4fde7c Mon Sep 17 00:00:00 2001 +From: Tom St Denis <tom.stdenis@amd.com> +Date: Fri, 24 May 2019 09:15:17 -0400 +Subject: [PATCH 2001/2940] drm/amd/doc: Add XGMI sysfs documentation + +Acked-by: Slava Abramov <slava.abramov@amd.com> +Signed-off-by: Tom St Denis <tom.stdenis@amd.com> +Reviewed-by: Alex Deucher <alexander.deucher@amd.com> +Signed-off-by: Alex Deucher <alexander.deucher@amd.com> +--- + Documentation/gpu/amdgpu.rst | 9 ++++++++ + drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c | 28 ++++++++++++++++++++++++ + 2 files changed, 37 insertions(+) + +diff --git a/Documentation/gpu/amdgpu.rst b/Documentation/gpu/amdgpu.rst +index a740e491dfcc..cacfcfad2356 100644 +--- a/Documentation/gpu/amdgpu.rst ++++ b/Documentation/gpu/amdgpu.rst +@@ -70,6 +70,15 @@ Interrupt Handling + .. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c + :internal: + ++AMDGPU XGMI Support ++=================== ++ ++.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c ++ :doc: AMDGPU XGMI Support ++ ++.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c ++ :internal: ++ + GPU Power/Thermal Controls and Monitoring + ========================================= + +diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c +index ae2a1ac01dba..b9ba99f6b3fb 100644 +--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c ++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c +@@ -40,6 +40,34 @@ void *amdgpu_xgmi_hive_try_lock(struct amdgpu_hive_info *hive) + return &hive->device_list; + } + ++/** ++ * DOC: AMDGPU XGMI Support ++ * ++ * XGMI is a high speed interconnect that joins multiple GPU cards ++ * into a homogeneous memory space that is organized by a collective ++ * hive ID and individual node IDs, both of which are 64-bit numbers. ++ * ++ * The file xgmi_device_id contains the unique per GPU device ID and ++ * is stored in the /sys/class/drm/card${cardno}/device/ directory. ++ * ++ * Inside the device directory a sub-directory 'xgmi_hive_info' is ++ * created which contains the hive ID and the list of nodes. ++ * ++ * The hive ID is stored in: ++ * /sys/class/drm/card${cardno}/device/xgmi_hive_info/xgmi_hive_id ++ * ++ * The node information is stored in numbered directories: ++ * /sys/class/drm/card${cardno}/device/xgmi_hive_info/node${nodeno}/xgmi_device_id ++ * ++ * Each device has their own xgmi_hive_info direction with a mirror ++ * set of node sub-directories. ++ * ++ * The XGMI memory space is built by contiguously adding the power of ++ * two padded VRAM space from each node to each other. ++ * ++ */ ++ ++ + static ssize_t amdgpu_xgmi_show_hive_id(struct device *dev, + struct device_attribute *attr, char *buf) + { +-- +2.17.1 + |