Merge tag 'drm-misc-next-2023-10-27' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for v6.7-rc1:

drm-misc-next-2023-10-19 + following:

UAPI Changes:

Cross-subsystem Changes:
- Convert fbdev drivers to use fbdev i/o mem helpers.

Core Changes:
- Use cross-references for macros in docs.
- Make drm_client_buffer_addb use addfb2.
- Add NV20 and NV30 YUV formats.
- Documentation updates for create_dumb ioctl.
- CI fixes.
- Allow variable number of run-queues in scheduler.

Driver Changes:
- Rename drm/ast constants.
- Make ili9882t its own driver.
- Assorted fixes in ivpu, vc4, bridge/synopsis, amdgpu.
- Add planar formats to rockchip.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/3d92fae8-9b1b-4165-9ca8-5fda11ee146b@linux.intel.com

7 files changed, 345 insertions, 8 deletions

diff --git a/Documentation/gpu/automated_testing.rst b/Documentation/gpu/automated_testing.rst
index 469b6fb65c30..240e29d5ba68 100644
--- a/Documentation/gpu/automated_testing.rst
+++ b/Documentation/gpu/automated_testing.rst
@@ -67,6 +67,19 @@ Lists the tests that for a given driver on a specific hardware revision are
 known to behave unreliably. These tests won't cause a job to fail regardless of
 the result. They will still be run.
 
+Each new flake entry must be associated with a link to the email reporting the
+bug to the author of the affected driver, the board name or Device Tree name of
+the board, the first kernel version affected, and an approximation of the
+failure rate.
+
+They should be provided under the following format::
+
+  # Bug Report: $LORE_OR_PATCHWORK_URL
+  # Board Name: broken-board.dtb
+  # Version: 6.6-rc1
+  # Failure Rate: 100
+  flaky-test
+
 drivers/gpu/drm/ci/${DRIVER_NAME}-${HW_REVISION}-skips.txt
 -----------------------------------------------------------
 
@@ -86,10 +99,13 @@ https://gitlab.freedesktop.org/janedoe/linux/-/settings/ci_cd), change the
 CI/CD configuration file from .gitlab-ci.yml to
 drivers/gpu/drm/ci/gitlab-ci.yml.
 
-3. Next time you push to this repository, you will see a CI pipeline being
+3. Request to be added to the drm/ci-ok group so that your user has the
+necessary privileges to run the CI on https://gitlab.freedesktop.org/drm/ci-ok
+
+4. Next time you push to this repository, you will see a CI pipeline being
 created (eg. https://gitlab.freedesktop.org/janedoe/linux/-/pipelines)
 
-4. The various jobs will be run and when the pipeline is finished, all jobs
+5. The various jobs will be run and when the pipeline is finished, all jobs
 should be green unless a regression has been found.
 
 
diff --git a/Documentation/gpu/drm-kms.rst b/Documentation/gpu/drm-kms.rst
index a0c83fc48126..270d320407c7 100644
--- a/Documentation/gpu/drm-kms.rst
+++ b/Documentation/gpu/drm-kms.rst
@@ -360,6 +360,8 @@ Format Functions Reference
 .. kernel-doc:: drivers/gpu/drm/drm_fourcc.c
    :export:
 
+.. _kms_dumb_buffer_objects:
+
 Dumb Buffer Objects
 ===================
 
diff --git a/Documentation/gpu/drm-uapi.rst b/Documentation/gpu/drm-uapi.rst
index 632989df3727..370d820be248 100644
--- a/Documentation/gpu/drm-uapi.rst
+++ b/Documentation/gpu/drm-uapi.rst
@@ -527,12 +527,12 @@ VBlank event handling
 
 The DRM core exposes two vertical blank related ioctls:
 
-DRM_IOCTL_WAIT_VBLANK
+:c:macro:`DRM_IOCTL_WAIT_VBLANK`
     This takes a struct drm_wait_vblank structure as its argument, and
     it is used to block or request a signal when a specified vblank
     event occurs.
 
-DRM_IOCTL_MODESET_CTL
+:c:macro:`DRM_IOCTL_MODESET_CTL`
     This was only used for user-mode-settind drivers around modesetting
     changes to allow the kernel to update the vblank interrupt after
     mode setting, since on many devices the vertical blank counter is
@@ -555,8 +555,8 @@ The index is used in cases where a densely packed identifier for a CRTC is
 needed, for instance a bitmask of CRTC's. The member possible_crtcs of struct
 drm_mode_get_plane is an example.
 
-DRM_IOCTL_MODE_GETRESOURCES populates a structure with an array of CRTC ID's,
-and the CRTC index is its position in this array.
+:c:macro:`DRM_IOCTL_MODE_GETRESOURCES` populates a structure with an array of
+CRTC ID's, and the CRTC index is its position in this array.
 
 .. kernel-doc:: include/uapi/drm/drm.h
    :internal:
diff --git a/Documentation/gpu/drm-vm-bind-async.rst b/Documentation/gpu/drm-vm-bind-async.rst
new file mode 100644
index 000000000000..3d709d02099c
--- /dev/null
+++ b/Documentation/gpu/drm-vm-bind-async.rst
@@ -0,0 +1,309 @@
+.. SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+====================
+Asynchronous VM_BIND
+====================
+
+Nomenclature:
+=============
+
+* ``VRAM``: On-device memory. Sometimes referred to as device local memory.
+
+* ``gpu_vm``: A virtual GPU address space. Typically per process, but
+  can be shared by multiple processes.
+
+* ``VM_BIND``: An operation or a list of operations to modify a gpu_vm using
+  an IOCTL. The operations include mapping and unmapping system- or
+  VRAM memory.
+
+* ``syncobj``: A container that abstracts synchronization objects. The
+  synchronization objects can be either generic, like dma-fences or
+  driver specific. A syncobj typically indicates the type of the
+  underlying synchronization object.
+
+* ``in-syncobj``: Argument to a VM_BIND IOCTL, the VM_BIND operation waits
+  for these before starting.
+
+* ``out-syncobj``: Argument to a VM_BIND_IOCTL, the VM_BIND operation
+  signals these when the bind operation is complete.
+
+* ``dma-fence``: A cross-driver synchronization object. A basic
+  understanding of dma-fences is required to digest this
+  document. Please refer to the ``DMA Fences`` section of the
+  :doc:`dma-buf doc </driver-api/dma-buf>`.
+
+* ``memory fence``: A synchronization object, different from a dma-fence.
+  A memory fence uses the value of a specified memory location to determine
+  signaled status. A memory fence can be awaited and signaled by both
+  the GPU and CPU. Memory fences are sometimes referred to as
+  user-fences, userspace-fences or gpu futexes and do not necessarily obey
+  the dma-fence rule of signaling within a "reasonable amount of time".
+  The kernel should thus avoid waiting for memory fences with locks held.
+
+* ``long-running workload``: A workload that may take more than the
+  current stipulated dma-fence maximum signal delay to complete and
+  which therefore needs to set the gpu_vm or the GPU execution context in
+  a certain mode that disallows completion dma-fences.
+
+* ``exec function``: An exec function is a function that revalidates all
+  affected gpu_vmas, submits a GPU command batch and registers the
+  dma_fence representing the GPU command's activity with all affected
+  dma_resvs. For completeness, although not covered by this document,
+  it's worth mentioning that an exec function may also be the
+  revalidation worker that is used by some drivers in compute /
+  long-running mode.
+
+* ``bind context``: A context identifier used for the VM_BIND
+  operation. VM_BIND operations that use the same bind context can be
+  assumed, where it matters, to complete in order of submission. No such
+  assumptions can be made for VM_BIND operations using separate bind contexts.
+
+* ``UMD``: User-mode driver.
+
+* ``KMD``: Kernel-mode driver.
+
+
+Synchronous / Asynchronous VM_BIND operation
+============================================
+
+Synchronous VM_BIND
+___________________
+With Synchronous VM_BIND, the VM_BIND operations all complete before the
+IOCTL returns. A synchronous VM_BIND takes neither in-fences nor
+out-fences. Synchronous VM_BIND may block and wait for GPU operations;
+for example swap-in or clearing, or even previous binds.
+
+Asynchronous VM_BIND
+____________________
+Asynchronous VM_BIND accepts both in-syncobjs and out-syncobjs. While the
+IOCTL may return immediately, the VM_BIND operations wait for the in-syncobjs
+before modifying the GPU page-tables, and signal the out-syncobjs when
+the modification is done in the sense that the next exec function that
+awaits for the out-syncobjs will see the change. Errors are reported
+synchronously.
+In low-memory situations the implementation may block, performing the
+VM_BIND synchronously, because there might not be enough memory
+immediately available for preparing the asynchronous operation.
+
+If the VM_BIND IOCTL takes a list or an array of operations as an argument,
+the in-syncobjs needs to signal before the first operation starts to
+execute, and the out-syncobjs signal after the last operation
+completes. Operations in the operation list can be assumed, where it
+matters, to complete in order.
+
+Since asynchronous VM_BIND operations may use dma-fences embedded in
+out-syncobjs and internally in KMD to signal bind completion,  any
+memory fences given as VM_BIND in-fences need to be awaited
+synchronously before the VM_BIND ioctl returns, since dma-fences,
+required to signal in a reasonable amount of time, can never be made
+to depend on memory fences that don't have such a restriction.
+
+The purpose of an Asynchronous VM_BIND operation is for user-mode
+drivers to be able to pipeline interleaved gpu_vm modifications and
+exec functions. For long-running workloads, such pipelining of a bind
+operation is not allowed and any in-fences need to be awaited
+synchronously. The reason for this is twofold. First, any memory
+fences gated by a long-running workload and used as in-syncobjs for the
+VM_BIND operation will need to be awaited synchronously anyway (see
+above). Second, any dma-fences used as in-syncobjs for VM_BIND
+operations for long-running workloads will not allow for pipelining
+anyway since long-running workloads don't allow for dma-fences as
+out-syncobjs, so while theoretically possible the use of them is
+questionable and should be rejected until there is a valuable use-case.
+Note that this is not a limitation imposed by dma-fence rules, but
+rather a limitation imposed to keep KMD implementation simple. It does
+not affect using dma-fences as dependencies for the long-running
+workload itself, which is allowed by dma-fence rules, but rather for
+the VM_BIND operation only.
+
+An asynchronous VM_BIND operation may take substantial time to
+complete and signal the out_fence. In particular if the operation is
+deeply pipelined behind other VM_BIND operations and workloads
+submitted using exec functions. In that case, UMD might want to avoid a
+subsequent VM_BIND operation to be queued behind the first one if
+there are no explicit dependencies. In order to circumvent such a queue-up, a
+VM_BIND implementation may allow for VM_BIND contexts to be
+created. For each context, VM_BIND operations will be guaranteed to
+complete in the order they were submitted, but that is not the case
+for VM_BIND operations executing on separate VM_BIND contexts. Instead
+KMD will attempt to execute such VM_BIND operations in parallel but
+leaving no guarantee that they will actually be executed in
+parallel. There may be internal implicit dependencies that only KMD knows
+about, for example page-table structure changes. A way to attempt
+to avoid such internal dependencies is to have different VM_BIND
+contexts use separate regions of a VM.
+
+Also for VM_BINDS for long-running gpu_vms the user-mode driver should typically
+select memory fences as out-fences since that gives greater flexibility for
+the kernel mode driver to inject other operations into the bind /
+unbind operations. Like for example inserting breakpoints into batch
+buffers. The workload execution can then easily be pipelined behind
+the bind completion using the memory out-fence as the signal condition
+for a GPU semaphore embedded by UMD in the workload.
+
+There is no difference in the operations supported or in
+multi-operation support between asynchronous VM_BIND and synchronous VM_BIND.
+
+Multi-operation VM_BIND IOCTL error handling and interrupts
+===========================================================
+
+The VM_BIND operations of the IOCTL may error for various reasons, for
+example due to lack of resources to complete and due to interrupted
+waits.
+In these situations UMD should preferably restart the IOCTL after
+taking suitable action.
+If UMD has over-committed a memory resource, an -ENOSPC error will be
+returned, and UMD may then unbind resources that are not used at the
+moment and rerun the IOCTL. On -EINTR, UMD should simply rerun the
+IOCTL and on -ENOMEM user-space may either attempt to free known
+system memory resources or fail. In case of UMD deciding to fail a
+bind operation, due to an error return, no additional action is needed
+to clean up the failed operation, and the VM is left in the same state
+as it was before the failing IOCTL.
+Unbind operations are guaranteed not to return any errors due to
+resource constraints, but may return errors due to, for example,
+invalid arguments or the gpu_vm being banned.
+In the case an unexpected error happens during the asynchronous bind
+process, the gpu_vm will be banned, and attempts to use it after banning
+will return -ENOENT.
+
+Example: The Xe VM_BIND uAPI
+============================
+
+Starting with the VM_BIND operation struct, the IOCTL call can take
+zero, one or many such operations. A zero number means only the
+synchronization part of the IOCTL is carried out: an asynchronous
+VM_BIND updates the syncobjects, whereas a sync VM_BIND waits for the
+implicit dependencies to be fulfilled.
+
+.. code-block:: c
+
+   struct drm_xe_vm_bind_op {
+	/**
+	 * @obj: GEM object to operate on, MBZ for MAP_USERPTR, MBZ for UNMAP
+	 */
+	__u32 obj;
+
+	/** @pad: MBZ */
+	__u32 pad;
+
+	union {
+		/**
+		 * @obj_offset: Offset into the object for MAP.
+		 */
+		__u64 obj_offset;
+
+		/** @userptr: user virtual address for MAP_USERPTR */
+		__u64 userptr;
+	};
+
+	/**
+	 * @range: Number of bytes from the object to bind to addr, MBZ for UNMAP_ALL
+	 */
+	__u64 range;
+
+	/** @addr: Address to operate on, MBZ for UNMAP_ALL */
+	__u64 addr;
+
+	/**
+	 * @tile_mask: Mask for which tiles to create binds for, 0 == All tiles,
+	 * only applies to creating new VMAs
+	 */
+	__u64 tile_mask;
+
+       /* Map (parts of) an object into the GPU virtual address range.
+    #define XE_VM_BIND_OP_MAP		0x0
+        /* Unmap a GPU virtual address range */
+    #define XE_VM_BIND_OP_UNMAP		0x1
+        /*
+	 * Map a CPU virtual address range into a GPU virtual
+	 * address range.
+	 */
+    #define XE_VM_BIND_OP_MAP_USERPTR	0x2
+        /* Unmap a gem object from the VM. */
+    #define XE_VM_BIND_OP_UNMAP_ALL	0x3
+        /*
+	 * Make the backing memory of an address range resident if
+	 * possible. Note that this doesn't pin backing memory.
+	 */
+    #define XE_VM_BIND_OP_PREFETCH	0x4
+
+        /* Make the GPU map readonly. */
+    #define XE_VM_BIND_FLAG_READONLY	(0x1 << 16)
+	/*
+	 * Valid on a faulting VM only, do the MAP operation immediately rather
+	 * than deferring the MAP to the page fault handler.
+	 */
+    #define XE_VM_BIND_FLAG_IMMEDIATE	(0x1 << 17)
+	/*
+	 * When the NULL flag is set, the page tables are setup with a special
+	 * bit which indicates writes are dropped and all reads return zero.  In
+	 * the future, the NULL flags will only be valid for XE_VM_BIND_OP_MAP
+	 * operations, the BO handle MBZ, and the BO offset MBZ. This flag is
+	 * intended to implement VK sparse bindings.
+	 */
+    #define XE_VM_BIND_FLAG_NULL	(0x1 << 18)
+	/** @op: Operation to perform (lower 16 bits) and flags (upper 16 bits) */
+	__u32 op;
+
+	/** @mem_region: Memory region to prefetch VMA to, instance not a mask */
+	__u32 region;
+
+	/** @reserved: Reserved */
+	__u64 reserved[2];
+   };
+
+
+The VM_BIND IOCTL argument itself, looks like follows. Note that for
+synchronous VM_BIND, the num_syncs and syncs fields must be zero. Here
+the ``exec_queue_id`` field is the VM_BIND context discussed previously
+that is used to facilitate out-of-order VM_BINDs.
+
+.. code-block:: c
+
+    struct drm_xe_vm_bind {
+	/** @extensions: Pointer to the first extension struct, if any */
+	__u64 extensions;
+
+	/** @vm_id: The ID of the VM to bind to */
+	__u32 vm_id;
+
+	/**
+	 * @exec_queue_id: exec_queue_id, must be of class DRM_XE_ENGINE_CLASS_VM_BIND
+	 * and exec queue must have same vm_id. If zero, the default VM bind engine
+	 * is used.
+	 */
+	__u32 exec_queue_id;
+
+	/** @num_binds: number of binds in this IOCTL */
+	__u32 num_binds;
+
+        /* If set, perform an async VM_BIND, if clear a sync VM_BIND */
+    #define XE_VM_BIND_IOCTL_FLAG_ASYNC	(0x1 << 0)
+
+	/** @flag: Flags controlling all operations in this ioctl. */
+	__u32 flags;
+
+	union {
+		/** @bind: used if num_binds == 1 */
+		struct drm_xe_vm_bind_op bind;
+
+		/**
+		 * @vector_of_binds: userptr to array of struct
+		 * drm_xe_vm_bind_op if num_binds > 1
+		 */
+		__u64 vector_of_binds;
+	};
+
+	/** @num_syncs: amount of syncs to wait for or to signal on completion. */
+	__u32 num_syncs;
+
+	/** @pad2: MBZ */
+	__u32 pad2;
+
+	/** @syncs: pointer to struct drm_xe_sync array */
+	__u64 syncs;
+
+	/** @reserved: Reserved */
+	__u64 reserved[2];
+    };
diff --git a/Documentation/gpu/implementation_guidelines.rst b/Documentation/gpu/implementation_guidelines.rst
new file mode 100644
index 000000000000..138e637dcc6b
--- /dev/null
+++ b/Documentation/gpu/implementation_guidelines.rst
@@ -0,0 +1,9 @@
+.. SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+===========================================================
+Misc DRM driver uAPI- and feature implementation guidelines
+===========================================================
+
+.. toctree::
+
+   drm-vm-bind-async
diff --git a/Documentation/gpu/index.rst b/Documentation/gpu/index.rst
index e45ff0915246..37e383ccf73f 100644
--- a/Documentation/gpu/index.rst
+++ b/Documentation/gpu/index.rst
@@ -18,6 +18,7 @@ GPU Driver Developer's Guide
    vga-switcheroo
    vgaarbiter
    automated_testing
+   implementation_guidelines
    todo
    rfc/index
 
diff --git a/Documentation/gpu/rfc/xe.rst b/Documentation/gpu/rfc/xe.rst
index b67f8e6a1825..c29113a0ac30 100644
--- a/Documentation/gpu/rfc/xe.rst
+++ b/Documentation/gpu/rfc/xe.rst
@@ -97,8 +97,8 @@ memory fences. Ideally with helper support so people don't get it wrong in all
 possible ways.
 
 As a key measurable result, the benefits of ASYNC VM_BIND and a discussion of
-various flavors, error handling and a sample API should be documented here or in
-a separate document pointed to by this document.
+various flavors, error handling and sample API suggestions are documented in
+:doc:`The ASYNC VM_BIND document </gpu/drm-vm-bind-async>`.
 
 Userptr integration and vm_bind
 -------------------------------