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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-08-07 13:17:46 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-08-07 13:17:46 +0000
commit7f3a4257159dea8e7ef66d1a539dc6df708b8ed3 (patch)
treebcc69b5f4609f348fac49e2f59e210b29eaea783 /Documentation/gpu
parentAdding upstream version 6.9.12. (diff)
downloadlinux-7f3a4257159dea8e7ef66d1a539dc6df708b8ed3.tar.xz
linux-7f3a4257159dea8e7ef66d1a539dc6df708b8ed3.zip
Adding upstream version 6.10.3.upstream/6.10.3
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/gpu')
-rw-r--r--Documentation/gpu/amdgpu/debugging.rst80
-rw-r--r--Documentation/gpu/amdgpu/display/display-contributing.rst2
-rw-r--r--Documentation/gpu/amdgpu/index.rst1
-rw-r--r--Documentation/gpu/driver-uapi.rst5
-rw-r--r--Documentation/gpu/drm-kms.rst22
-rw-r--r--Documentation/gpu/i915.rst9
-rw-r--r--Documentation/gpu/panfrost.rst9
-rw-r--r--Documentation/gpu/rfc/i915_vm_bind.h11
8 files changed, 132 insertions, 7 deletions
diff --git a/Documentation/gpu/amdgpu/debugging.rst b/Documentation/gpu/amdgpu/debugging.rst
new file mode 100644
index 0000000000..e75f97d0e4
--- /dev/null
+++ b/Documentation/gpu/amdgpu/debugging.rst
@@ -0,0 +1,80 @@
+===============
+ GPU Debugging
+===============
+
+GPUVM Debugging
+===============
+
+To aid in debugging GPU virtual memory related problems, the driver supports a
+number of options module parameters:
+
+`vm_fault_stop` - If non-0, halt the GPU memory controller on a GPU page fault.
+
+`vm_update_mode` - If non-0, use the CPU to update GPU page tables rather than
+the GPU.
+
+
+Decoding a GPUVM Page Fault
+===========================
+
+If you see a GPU page fault in the kernel log, you can decode it to figure
+out what is going wrong in your application. A page fault in your kernel
+log may look something like this:
+
+::
+
+ [gfxhub0] no-retry page fault (src_id:0 ring:24 vmid:3 pasid:32777, for process glxinfo pid 2424 thread glxinfo:cs0 pid 2425)
+ in page starting at address 0x0000800102800000 from IH client 0x1b (UTCL2)
+ VM_L2_PROTECTION_FAULT_STATUS:0x00301030
+ Faulty UTCL2 client ID: TCP (0x8)
+ MORE_FAULTS: 0x0
+ WALKER_ERROR: 0x0
+ PERMISSION_FAULTS: 0x3
+ MAPPING_ERROR: 0x0
+ RW: 0x0
+
+First you have the memory hub, gfxhub and mmhub. gfxhub is the memory
+hub used for graphics, compute, and sdma on some chips. mmhub is the
+memory hub used for multi-media and sdma on some chips.
+
+Next you have the vmid and pasid. If the vmid is 0, this fault was likely
+caused by the kernel driver or firmware. If the vmid is non-0, it is generally
+a fault in a user application. The pasid is used to link a vmid to a system
+process id. If the process is active when the fault happens, the process
+information will be printed.
+
+The GPU virtual address that caused the fault comes next.
+
+The client ID indicates the GPU block that caused the fault.
+Some common client IDs:
+
+- CB/DB: The color/depth backend of the graphics pipe
+- CPF: Command Processor Frontend
+- CPC: Command Processor Compute
+- CPG: Command Processor Graphics
+- TCP/SQC/SQG: Shaders
+- SDMA: SDMA engines
+- VCN: Video encode/decode engines
+- JPEG: JPEG engines
+
+PERMISSION_FAULTS describe what faults were encountered:
+
+- bit 0: the PTE was not valid
+- bit 1: the PTE read bit was not set
+- bit 2: the PTE write bit was not set
+- bit 3: the PTE execute bit was not set
+
+Finally, RW, indicates whether the access was a read (0) or a write (1).
+
+In the example above, a shader (cliend id = TCP) generated a read (RW = 0x0) to
+an invalid page (PERMISSION_FAULTS = 0x3) at GPU virtual address
+0x0000800102800000. The user can then inspect their shader code and resource
+descriptor state to determine what caused the GPU page fault.
+
+UMR
+===
+
+`umr <https://gitlab.freedesktop.org/tomstdenis/umr>`_ is a general purpose
+GPU debugging and diagnostics tool. Please see the umr
+`documentation <https://umr.readthedocs.io/en/main/>`_ for more information
+about its capabilities.
diff --git a/Documentation/gpu/amdgpu/display/display-contributing.rst b/Documentation/gpu/amdgpu/display/display-contributing.rst
index fdb2bea01d..36f3077eee 100644
--- a/Documentation/gpu/amdgpu/display/display-contributing.rst
+++ b/Documentation/gpu/amdgpu/display/display-contributing.rst
@@ -135,7 +135,7 @@ Enable underlay
---------------
AMD display has this feature called underlay (which you can read more about at
-'Documentation/GPU/amdgpu/display/mpo-overview.rst') which is intended to
+'Documentation/gpu/amdgpu/display/mpo-overview.rst') which is intended to
save power when playing a video. The basic idea is to put a video in the
underlay plane at the bottom and the desktop in the plane above it with a hole
in the video area. This feature is enabled in ChromeOS, and from our data
diff --git a/Documentation/gpu/amdgpu/index.rst b/Documentation/gpu/amdgpu/index.rst
index 912e699fd3..847e049240 100644
--- a/Documentation/gpu/amdgpu/index.rst
+++ b/Documentation/gpu/amdgpu/index.rst
@@ -15,4 +15,5 @@ Next (GCN), Radeon DNA (RDNA), and Compute DNA (CDNA) architectures.
ras
thermal
driver-misc
+ debugging
amdgpu-glossary
diff --git a/Documentation/gpu/driver-uapi.rst b/Documentation/gpu/driver-uapi.rst
index e5070a0e95..971cdb4816 100644
--- a/Documentation/gpu/driver-uapi.rst
+++ b/Documentation/gpu/driver-uapi.rst
@@ -18,6 +18,11 @@ VM_BIND / EXEC uAPI
.. kernel-doc:: include/uapi/drm/nouveau_drm.h
+drm/panthor uAPI
+================
+
+.. kernel-doc:: include/uapi/drm/panthor_drm.h
+
drm/xe uAPI
===========
diff --git a/Documentation/gpu/drm-kms.rst b/Documentation/gpu/drm-kms.rst
index 13d3627d8b..abfe220764 100644
--- a/Documentation/gpu/drm-kms.rst
+++ b/Documentation/gpu/drm-kms.rst
@@ -398,6 +398,21 @@ Plane Damage Tracking Functions Reference
.. kernel-doc:: include/drm/drm_damage_helper.h
:internal:
+Plane Panic Feature
+-------------------
+
+.. kernel-doc:: drivers/gpu/drm/drm_panic.c
+ :doc: overview
+
+Plane Panic Functions Reference
+-------------------------------
+
+.. kernel-doc:: include/drm/drm_panic.h
+ :internal:
+
+.. kernel-doc:: drivers/gpu/drm/drm_panic.c
+ :export:
+
Display Modes Function Reference
================================
@@ -496,6 +511,13 @@ addition to the one mentioned above:
* An IGT test must be submitted where reasonable.
+For historical reasons, non-standard, driver-specific properties exist. If a KMS
+driver wants to add support for one of those properties, the requirements for
+new properties apply where possible. Additionally, the documented behavior must
+match the de facto semantics of the existing property to ensure compatibility.
+Developers of the driver that first added the property should help with those
+tasks and must ACK the documented behavior if possible.
+
Property Types and Blob Property Support
----------------------------------------
diff --git a/Documentation/gpu/i915.rst b/Documentation/gpu/i915.rst
index 0ca1550fd9..17261ba183 100644
--- a/Documentation/gpu/i915.rst
+++ b/Documentation/gpu/i915.rst
@@ -204,6 +204,15 @@ DMC Firmware Support
.. kernel-doc:: drivers/gpu/drm/i915/display/intel_dmc.c
:internal:
+DMC wakelock support
+--------------------
+
+.. kernel-doc:: drivers/gpu/drm/i915/display/intel_dmc_wl.c
+ :doc: DMC wakelock support
+
+.. kernel-doc:: drivers/gpu/drm/i915/display/intel_dmc_wl.c
+ :internal:
+
Video BIOS Table (VBT)
----------------------
diff --git a/Documentation/gpu/panfrost.rst b/Documentation/gpu/panfrost.rst
index b80e41f4b2..51ba375fd8 100644
--- a/Documentation/gpu/panfrost.rst
+++ b/Documentation/gpu/panfrost.rst
@@ -38,3 +38,12 @@ the currently possible format options:
Possible `drm-engine-` key names are: `fragment`, and `vertex-tiler`.
`drm-curfreq-` values convey the current operating frequency for that engine.
+
+Users must bear in mind that engine and cycle sampling are disabled by default,
+because of power saving concerns. `fdinfo` users and benchmark applications which
+query the fdinfo file must make sure to toggle the job profiling status of the
+driver by writing into the appropriate sysfs node::
+
+ echo <N> > /sys/bus/platform/drivers/panfrost/[a-f0-9]*.gpu/profiling
+
+Where `N` is either `0` or `1`, depending on the desired enablement status.
diff --git a/Documentation/gpu/rfc/i915_vm_bind.h b/Documentation/gpu/rfc/i915_vm_bind.h
index 8a8fcd4fce..bc26dc1261 100644
--- a/Documentation/gpu/rfc/i915_vm_bind.h
+++ b/Documentation/gpu/rfc/i915_vm_bind.h
@@ -93,12 +93,11 @@ struct drm_i915_gem_timeline_fence {
* Multiple VA mappings can be created to the same section of the object
* (aliasing).
*
- * The @start, @offset and @length must be 4K page aligned. However the DG2
- * and XEHPSDV has 64K page size for device local memory and has compact page
- * table. On those platforms, for binding device local-memory objects, the
- * @start, @offset and @length must be 64K aligned. Also, UMDs should not mix
- * the local memory 64K page and the system memory 4K page bindings in the same
- * 2M range.
+ * The @start, @offset and @length must be 4K page aligned. However the DG2 has
+ * 64K page size for device local memory and has compact page table. On that
+ * platform, for binding device local-memory objects, the @start, @offset and
+ * @length must be 64K aligned. Also, UMDs should not mix the local memory 64K
+ * page and the system memory 4K page bindings in the same 2M range.
*
* Error code -EINVAL will be returned if @start, @offset and @length are not
* properly aligned. In version 1 (See I915_PARAM_VM_BIND_VERSION), error code