Thomas needs 5a498d4d06 ("drm/fbdev-dma: Only install deferred I/O
if necessary") in drm-misc, so start the backmerge cascade.
Signed-off-by: Simona Vetter <simona.vetter@ffwll.ch>
Pull drm updates from Dave Airlie:
"There's a lot of stuff in here, amd, i915 and xe have new platform
work, lots of core rework around EDID handling, some new COMPILE_TEST
options, maintainer changes and a lots of other stuff. Summary:
core:
- deprecate DRM data and return 0 date
- connector: Create a set of helpers to help with HDMI support
- Remove driver owner assignments
- Allow more drivers to compile with COMPILE_TEST
- Conversions to drm_edid
- Sprinkle MODULE_DESCRIPTIONS everywhere they are missing
- Remove drm_mm_replace_node
- print: Add a drm prefix to warn level messages too, remove
___drm_dbg, consolidate prefix handling
- New monochrome TV mode variant
ttm:
- improve number of page faults on some platforms
- fix test builds under PREEMPT_RT
- more test coverage
ci:
- Require a more recent version of mesa
- improve farm setup and test generation
dma-buf:
- warn if reserving 0 fence slots
- internal API heap enhancements
fbdev:
- Create memory manager optimized fbdev emulation
panic:
- Allow to select fonts
- improve drm_fb_dma_get_scanout_buffer
- Allow to dump kmsg to the screen
bridge:
- Remove redundant checks on bridge->encoder
- Remove drm_bridge_chain_mode_fixup
- bridge-connector: Plumb in the new HDMI helper
- analogix_dp: Various improvements, handle AUX transfers timeout
- samsung-dsim: Fix timings calculation
- tc358767: Plenty of small fixes, fix no connector attach, fix
clocks
- sii902x: state validation improvements
panels:
- Switch panels from register table initialization to proper code
- Now that the panel code tracks the panel state, remove every ad-hoc
implementation in the panel drivers
- More cleanup of prepare / enable state tracking in drivers
- edp: Drop legacy panel compatibles
- simple-bridge: Switch to devm_drm_bridge_add
- New panels: Lincoln Tech Sol LCD185-101CT, Microtips Technology
13-101HIEBCAF0-C, Microtips Technology MF-103HIEB0GA0,
BOE nv110wum-l60, IVO t109nw41, WL-355608-A8, PrimeView
PM070WL4, Lincoln Technologies LCD197, Ortustech
COM35H3P70ULC, AUO G104STN01, K&d kd101ne3-40ti
amdgpu:
- DCN 4.0.x support
- GC 12.0 support
- GMC 12.0 support
- SDMA 7.0 support
- MES12 support
- MMHUB 4.1 support
- GFX12 modifier and DCC support
- lots of IP fixes/updates
amdkfd:
- Contiguous VRAM allocations
- GC 12.0 support
- SDMA 7.0 support
- SR-IOV fixes
- KFD GFX ALU exceptions
i915:
- Battlemage Xe2 HPD display enablement
- Panel Replay enabling
- DP AUX-less ALPM/LOBF
- Enable link training failure fallback for DP MST links
- CMRR (Content Match Refresh Rate) enabling
- Increase ADL-S/ADL-P/DG2+ max TMDS bitrate to 6 Gbps
- Enable eDP AUX based HDR backlight
- Support replaying GPU hangs with captured context image
- Automate CCS Mode setting during engine resets
- lots of refactoring
- Support replaying GPU hangs with captured context image
- Increase FLR timeout from 3s to 9s
- Enable w/a 16021333562 for DG2, MTL and ARL [guc]
xe:
- update MAINATINERS
- New uapi adding OA functionality to Xe
- expose l3 bank mask
- fix display detect on ADL-N
- runtime PM Fixes
- Fix silent backmerge issues
- More prep for SR-IOV
- HWmon additions
- per client usage info
- Rework GPU page fault handling
- Drop EXEC_QUEUE_FLAG_BANNED
- Add BMG PCI IDs
- Scheduler fixes and improvements
- Rename xe_exec_queue::compute to xe_exec_queue::lr
- Use ttm_uncached for BO with NEEDS_UC flag
- Rename xe perf layer as xe observation layer
- lots of refactoring
radeon:
- Backlight workaround for iMac
- Silence UBSAN flex array warnings
msm:
- Validate registers XML description against schema in CI
- core/dpu: SM7150 support
- mdp5: Add support for MSM8937
- gpu: Add param for userspace to know if raytracing is supported
- gpu: X185 support (aka gpu in X1 laptop chips)
- gpu: a505 support
ivpu:
- hardware scheduler support
- profiling support
- improvements to the platform support layer
- firmware handling improvements
- clocks/power mgmt improvements
- scheduler/logging improvements
habanalabs:
- Gradual sleep in polling memory macro
- Reduce Gaudi2 MSI-X interrupt count to 128
- Add Gaudi2-D revision support
- Add timestamp to CPLD info
- Gaudi2: Assume hard-reset by firmware upon MC SEI severe error
- Align Gaudi2 interrupt names
- Check for errors after preboot is ready
- Change habanalabs maintainer and git repo path
mgag200:
- refactoring and improvements
- Add BMC output
- enable polling
nouveau:
- add registry command line
v3d:
- perf counters improvements
zynqmp:
- irq and debugfs improvements
atmel-hlcdc:
- Support XLCDC in sam9x7
mipi-dbi:
- Remove mipi_dbi_machine_little_endian
- make SPI bits per word configurable
- support RGB888
- allow pixel formats to be specified in the DT
sun4i:
- Rework the blender setup for DE2
panfrost:
- Enable MT8188 support
vc4:
- Monochrome TV support
exynos:
- fix fallback mode regression
- fix memory leak
- Use drm_edid_duplicate() instead of kmemdup()
etnaviv:
- fix i.MX8MP NPU clock gating
- workaround FE register cdc issues on some cores
- fix DMA sync handling for cached buffers
- fix job timeout handling
- keep TS enabled on MMUv2 cores for improved performance
mediatek:
- Convert to platform remove callback returning void-
- Drop chain_mode_fixup call in mode_valid()
- Fixes the errors of MediaTek display driver found by IGT
- Add display support for the MT8365-EVK board
- Fix bit depth overwritten for mtk_ovl_set bit_depth()
- Fix possible_crtcs calculation
- Fix spurious kfree()
ast:
- refactor mode setting code
stm:
- Add LVDS support
- DSI PHY updates"
* tag 'drm-next-2024-07-18' of https://gitlab.freedesktop.org/drm/kernel: (2501 commits)
drm/amdgpu/mes12: add missing opcode string
drm/amdgpu/mes11: update opcode strings
Revert "drm/amd/display: Reset freesync config before update new state"
drm/omap: Restrict compile testing to PAGE_SIZE less than 64KB
drm/xe: Drop trace_xe_hw_fence_free
drm/xe/uapi: Rename xe perf layer as xe observation layer
drm/amdgpu: remove exp hw support check for gfx12
drm/amdgpu: timely save bad pages to eeprom after gpu ras reset is completed
drm/amdgpu: flush all cached ras bad pages to eeprom
drm/amdgpu: select compute ME engines dynamically
drm/amd/display: Allow display DCC for DCN401
drm/amdgpu: select compute ME engines dynamically
drm/amdgpu/job: Replace DRM_INFO/ERROR logging
drm/amdgpu: select compute ME engines dynamically
drm/amd/pm: Ignore initial value in smu response register
drm/amdgpu: Initialize VF partition mode
drm/amd/amdgpu: fix SDMA IRQ client ID <-> req mapping
MAINTAINERS: fix Xinhui's name
MAINTAINERS: update powerplay and swsmu
drm/qxl: Pin buffer objects for internal mappings
...
If a queue is already assigned to the hardware, then a newly submitted
job can start straight away without waiting for the tick. However in
this case the devfreq infrastructure isn't notified that the GPU is
busy. By the time the tick happens the job might well have finished and
no time will be accounted for the GPU being busy.
Fix this by recording the GPU as busy directly in queue_run_job() in the
case where there is a CSG assigned and therefore we just ring the
doorbell.
Fixes: de85488138 ("drm/panthor: Add the scheduler logical block")
Signed-off-by: Steven Price <steven.price@arm.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240703155646.80928-1-steven.price@arm.com
The field used to store the chunk size if 12 bits wide, and the encoding
is chunk_size = chunk_header.chunk_size << 12, which gives us a
theoretical [4k:8M] range. This range is further limited by
implementation constraints, and all known implementations seem to
impose a [128k:8M] range, so do the same here.
We also relax the power-of-two constraint, which doesn't seem to
exist on v10. This will allow userspace to fine-tune initial/max
tiler memory on memory-constrained devices.
v4:
- Actually fix the range in the kerneldoc
v3:
- Add R-bs
- Fix valid range in the kerneldoc
v2:
- Turn the power-of-two constraint into a page-aligned constraint to allow
fine-tune of the initial/max heap memory size
- Fix the panthor_heap_create() kerneldoc
Fixes: 9cca48fa4f ("drm/panthor: Add the heap logical block")
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240502165158.1458959-4-boris.brezillon@collabora.com
If the kernel couldn't allocate memory because we reached the maximum
number of chunks but no render passes are in flight
(panthor_heap_grow() returning -ENOMEM), we should defer the OOM
handling to the FW by returning a NULL chunk. The FW will then call
the tiler OOM exception handler, which is supposed to implement
incremental rendering (execute an intermediate fragment job to flush
the pending primitives, release the tiler memory that was used to
store those primitives, and start over from where it stopped).
Instead of checking for both ENOMEM and EBUSY, make panthor_heap_grow()
return ENOMEM no matter the reason of this allocation failure, the FW
doesn't care anyway.
v3:
- Add R-bs
v2:
- Make panthor_heap_grow() return -ENOMEM for all kind of allocation
failures
- Document the panthor_heap_grow() semantics
Fixes: de85488138 ("drm/panthor: Add the scheduler logical block")
Signed-off-by: Antonino Maniscalco <antonino.maniscalco@collabora.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240502165158.1458959-2-boris.brezillon@collabora.com
Make sure we set suspended=true last to avoid generating an irq storm
in the unlikely case where an IRQ happens between the suspended=true
assignment and the _INT_MASK update.
We also move the mask=0 assignment before writing to the _INT_MASK
register to prevent the thread handler from unmasking the interrupt
behind our back. This means we might lose events if there were some
pending when we get to suspend the IRQ, but that's fine.
The synchronize_irq() we have in the _irq_suspend() path was not
there to make sure all IRQs are processed, just to make sure we don't
have registers accesses coming from the irq handlers after
_irq_suspend() has been called. If there's a need to have all pending
IRQs processed, it should happen before _irq_suspend() is called.
v3:
- Add Steve's R-b
v2:
- New patch
Fixes: 5fe909cae1 ("drm/panthor: Add the device logical block")
Reported-by: Steven Price <steven.price@arm.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240326111205.510019-2-boris.brezillon@collabora.com
When mapping an IO region, the pseudo-file offset is dependent on the
userspace architecture. panthor_device_mmio_offset() abstracts that
away for us by turning a userspace MMIO offset into its kernel
equivalent, but we were not updating vm_area_struct::vm_pgoff
accordingly, leading us to attach the MMIO region to the wrong file
offset.
This has implications when we start mixing 64 bit and 32 bit apps, but
that's only really a problem when we start having more that 2^43 bytes of
memory allocated, which is very unlikely to happen.
What's more problematic is the fact this turns our
unmap_mapping_range(DRM_PANTHOR_USER_MMIO_OFFSET) calls, which are
supposed to kill the MMIO mapping when entering suspend, into NOPs.
Which means we either keep the dummy flush_id mapping active at all
times, or we risk a BUS_FAULT if the MMIO region was mapped, and the
GPU is suspended after that.
Solve that by patching vm_pgoff early in panthor_mmap(). With
this in place, we no longer need the panthor_device_mmio_offset()
helper.
v3:
- No changes
v2:
- Kill panthor_device_mmio_offset()
Fixes: 5fe909cae1 ("drm/panthor: Add the device logical block")
Reported-by: Adrián Larumbe <adrian.larumbe@collabora.com>
Reported-by: Lukas F. Hartmann <lukas@mntmn.com>
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/10835
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240326111205.510019-1-boris.brezillon@collabora.com
This reverts commit 674dc7f61a.
The commit causes a recursive dependency in kconfig:
drivers/iommu/Kconfig:14:error: recursive dependency detected!
drivers/iommu/Kconfig:14: symbol IOMMU_SUPPORT is selected by DRM_PANTHOR
drivers/gpu/drm/panthor/Kconfig:3: symbol DRM_PANTHOR depends on PM
kernel/power/Kconfig:183: symbol PM is selected by PM_SLEEP
kernel/power/Kconfig:117: symbol PM_SLEEP depends on HIBERNATE_CALLBACKS
kernel/power/Kconfig:35: symbol HIBERNATE_CALLBACKS is selected by XEN_SAVE_RESTORE
arch/x86/xen/Kconfig:67: symbol XEN_SAVE_RESTORE depends on XEN
arch/x86/xen/Kconfig:6: symbol XEN depends on PARAVIRT
arch/x86/Kconfig:781: symbol PARAVIRT is selected by HYPERV
drivers/hv/Kconfig:5: symbol HYPERV depends on X86_LOCAL_APIC
arch/x86/Kconfig:1106: symbol X86_LOCAL_APIC depends on X86_UP_APIC
arch/x86/Kconfig:1081: symbol X86_UP_APIC prompt is visible depending on PCI_MSI
drivers/pci/Kconfig:39: symbol PCI_MSI is selected by AMD_IOMMU
drivers/iommu/amd/Kconfig:3: symbol AMD_IOMMU depends on IOMMU_SUPPORT
For a resolution refer to Documentation/kbuild/kconfig-language.rst
subsection "Kconfig recursive dependency limitations"
Fixes: 674dc7f61a ("drm/panthor: Fix undefined panthor_device_suspend/resume symbol issue")
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Steven Price <steven.price@arm.com>
Acked-by: Boris Brezillon <boris.brezillon@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240311111619.249776-1-jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This is the last piece missing to expose the driver to the outside
world.
This is basically a wrapper between the ioctls and the other logical
blocks.
v6:
- Add Maxime's and Heiko's acks
- Return a page-aligned BO size to userspace
- Keep header inclusion alphabetically ordered
v5:
- Account for the drm_exec_init() prototype change
- Include platform_device.h
v4:
- Add an ioctl to let the UMD query the VM state
- Fix kernel doc
- Let panthor_device_init() call panthor_device_init()
- Fix cleanup ordering in the panthor_init() error path
- Add Steve's and Liviu's R-b
v3:
- Add acks for the MIT/GPL2 relicensing
- Fix 32-bit support
- Account for panthor_vm and panthor_sched changes
- Simplify the resv preparation/update logic
- Use a linked list rather than xarray for list of signals.
- Simplify panthor_get_uobj_array by returning the newly allocated
array.
- Drop the "DOC" for job submission helpers and move the relevant
comments to panthor_ioctl_group_submit().
- Add helpers sync_op_is_signal()/sync_op_is_wait().
- Simplify return type of panthor_submit_ctx_add_sync_signal() and
panthor_submit_ctx_get_sync_signal().
- Drop WARN_ON from panthor_submit_ctx_add_job().
- Fix typos in comments.
Co-developed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Steven Price <steven.price@arm.com> # MIT+GPL2 relicensing,Arm
Acked-by: Grant Likely <grant.likely@linaro.org> # MIT+GPL2 relicensing,Linaro
Acked-by: Boris Brezillon <boris.brezillon@collabora.com> # MIT+GPL2 relicensing,Collabora
Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240229162230.2634044-12-boris.brezillon@collabora.com
This is the piece of software interacting with the FW scheduler, and
taking care of some scheduling aspects when the FW comes short of slots
scheduling slots. Indeed, the FW only expose a few slots, and the kernel
has to give all submission contexts, a chance to execute their jobs.
The kernel-side scheduler is timeslice-based, with a round-robin queue
per priority level.
Job submission is handled with a 1:1 drm_sched_entity:drm_gpu_scheduler,
allowing us to delegate the dependency tracking to the core.
All the gory details should be documented inline.
v6:
- Add Maxime's and Heiko's acks
- Make sure the scheduler is initialized before queueing the tick work
in the MMU fault handler
- Keep header inclusion alphabetically ordered
v5:
- Fix typos
- Call panthor_kernel_bo_destroy(group->syncobjs) unconditionally
- Don't move the group to the waiting list tail when it was already
waiting for a different syncobj
- Fix fatal_queues flagging in the tiler OOM path
- Don't warn when more than one job timesout on a group
- Add a warning message when we fail to allocate a heap chunk
- Add Steve's R-b
v4:
- Check drmm_mutex_init() return code
- s/drm_gem_vmap_unlocked/drm_gem_vunmap_unlocked/ in
panthor_queue_put_syncwait_obj()
- Drop unneeded WARN_ON() in cs_slot_sync_queue_state_locked()
- Use atomic_xchg() instead of atomic_fetch_and(0)
- Fix typos
- Let panthor_kernel_bo_destroy() check for IS_ERR_OR_NULL() BOs
- Defer TILER_OOM event handling to a separate workqueue to prevent
deadlocks when the heap chunk allocation is blocked on mem-reclaim.
This is just a temporary solution, until we add support for
non-blocking/failable allocations
- Pass the scheduler workqueue to drm_sched instead of instantiating
a separate one (no longer needed now that heap chunk allocation
happens on a dedicated wq)
- Set WQ_MEM_RECLAIM on the scheduler workqueue, so we can handle
job timeouts when the system is under mem pressure, and hopefully
free up some memory retained by these jobs
v3:
- Rework the FW event handling logic to avoid races
- Make sure MMU faults kill the group immediately
- Use the panthor_kernel_bo abstraction for group/queue buffers
- Make in_progress an atomic_t, so we can check it without the reset lock
held
- Don't limit the number of groups per context to the FW scheduler
capacity. Fix the limit to 128 for now.
- Add a panthor_job_vm() helper
- Account for panthor_vm changes
- Add our job fence as DMA_RESV_USAGE_WRITE to all external objects
(was previously DMA_RESV_USAGE_BOOKKEEP). I don't get why, given
we're supposed to be fully-explicit, but other drivers do that, so
there must be a good reason
- Account for drm_sched changes
- Provide a panthor_queue_put_syncwait_obj()
- Unconditionally return groups to their idle list in
panthor_sched_suspend()
- Condition of sched_queue_{,delayed_}work fixed to be only when a reset
isn't pending or in progress.
- Several typos in comments fixed.
Co-developed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240229162230.2634044-11-boris.brezillon@collabora.com
Tiler heap growing requires some kernel driver involvement: when the
tiler runs out of heap memory, it will raise an exception which is
either directly handled by the firmware if some free heap chunks are
available in the heap context, or passed back to the kernel otherwise.
The heap helpers will be used by the scheduler logic to allocate more
heap chunks to a heap context, when such a situation happens.
Heap context creation is explicitly requested by userspace (using
the TILER_HEAP_CREATE ioctl), and the returned context is attached to a
queue through some command stream instruction.
All the kernel does is keep the list of heap chunks allocated to a
context, so they can be freed when TILER_HEAP_DESTROY is called, or
extended when the FW requests a new chunk.
v6:
- Add Maxime's and Heiko's acks
v5:
- Fix FIXME comment
- Add Steve's R-b
v4:
- Rework locking to allow concurrent calls to panthor_heap_grow()
- Add a helper to return a heap chunk if we couldn't pass it to the
FW because the group was scheduled out
v3:
- Add a FIXME for the heap OOM deadlock
- Use the panthor_kernel_bo abstraction for the heap context and heap
chunks
- Drop the panthor_heap_gpu_ctx struct as it is opaque to the driver
- Ensure that the heap context is aligned to the GPU cache line size
- Minor code tidy ups
Co-developed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240229162230.2634044-10-boris.brezillon@collabora.com
Contains everything that's FW related, that includes the code dealing
with the microcontroller unit (MCU) that's running the FW, and anything
related to allocating memory shared between the FW and the CPU.
A few global FW events are processed in the IRQ handler, the rest is
forwarded to the scheduler, since scheduling is the primary reason for
the FW existence, and also the main source of FW <-> kernel
interactions.
v6:
- Add Maxime's and Heiko's acks
- Keep header inclusion alphabetically ordered
v5:
- Fix typo in GLB_PERFCNT_SAMPLE definition
- Fix unbalanced panthor_vm_idle/active() calls
- Fallback to a slow reset when the fast reset fails
- Add extra information when reporting a FW boot failure
v4:
- Add a MODULE_FIRMWARE() entry for gen 10.8
- Fix a wrong return ERR_PTR() in panthor_fw_load_section_entry()
- Fix typos
- Add Steve's R-b
v3:
- Make the FW path more future-proof (Liviu)
- Use one waitqueue for all FW events
- Simplify propagation of FW events to the scheduler logic
- Drop the panthor_fw_mem abstraction and use panthor_kernel_bo instead
- Account for the panthor_vm changes
- Replace magic number with 0x7fffffff with ~0 to better signify that
it's the maximum permitted value.
- More accurate rounding when computing the firmware timeout.
- Add a 'sub iterator' helper function. This also adds a check that a
firmware entry doesn't overflow the firmware image.
- Drop __packed from FW structures, natural alignment is good enough.
- Other minor code improvements.
Co-developed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240229162230.2634044-9-boris.brezillon@collabora.com
MMU and VM management is related and placed in the same source file.
Page table updates are delegated to the io-pgtable-arm driver that's in
the iommu subsystem.
The VM management logic is based on drm_gpuva_mgr, and is assuming the
VA space is mostly managed by the usermode driver, except for a reserved
portion of this VA-space that's used for kernel objects (like the heap
contexts/chunks).
Both asynchronous and synchronous VM operations are supported, and
internal helpers are exposed to allow other logical blocks to map their
buffers in the GPU VA space.
There's one VM_BIND queue per-VM (meaning the Vulkan driver can only
expose one sparse-binding queue), and this bind queue is managed with
a 1:1 drm_sched_entity:drm_gpu_scheduler, such that each VM gets its own
independent execution queue, avoiding VM operation serialization at the
device level (things are still serialized at the VM level).
The rest is just implementation details that are hopefully well explained
in the documentation.
v6:
- Add Maxime's and Heiko's acks
- Add Steve's R-b
- Adjust the TRANSCFG value to account for SW VA space limitation on
32-bit systems
- Keep header inclusion alphabetically ordered
v5:
- Fix a double panthor_vm_cleanup_op_ctx() call
- Fix a race between panthor_vm_prepare_map_op_ctx() and
panthor_vm_bo_put()
- Fix panthor_vm_pool_destroy_vm() kernel doc
- Fix paddr adjustment in panthor_vm_map_pages()
- Fix bo_offset calculation in panthor_vm_get_bo_for_va()
v4:
- Add an helper to return the VM state
- Check drmm_mutex_init() return code
- Remove the VM from the AS reclaim list when panthor_vm_active() is
called
- Count the number of active VM users instead of considering there's
at most one user (several scheduling groups can point to the same
vM)
- Pre-allocate a VMA object for unmap operations (unmaps can trigger
a sm_step_remap() call)
- Check vm->root_page_table instead of vm->pgtbl_ops to detect if
the io-pgtable is trying to allocate the root page table
- Don't memset() the va_node in panthor_vm_alloc_va(), make it a
caller requirement
- Fix the kernel doc in a few places
- Drop the panthor_vm::base offset constraint and modify
panthor_vm_put() to explicitly check for a NULL value
- Fix unbalanced vm_bo refcount in panthor_gpuva_sm_step_remap()
- Drop stale comments about the shared_bos list
- Patch mmu_features::va_bits on 32-bit builds to reflect the
io_pgtable limitation and let the UMD know about it
v3:
- Add acks for the MIT/GPL2 relicensing
- Propagate MMU faults to the scheduler
- Move pages pinning/unpinning out of the dma_signalling path
- Fix 32-bit support
- Rework the user/kernel VA range calculation
- Make the auto-VA range explicit (auto-VA range doesn't cover the full
kernel-VA range on the MCU VM)
- Let callers of panthor_vm_alloc_va() allocate the drm_mm_node
(embedded in panthor_kernel_bo now)
- Adjust things to match the latest drm_gpuvm changes (extobj tracking,
resv prep and more)
- Drop the per-AS lock and use slots_lock (fixes a race on vm->as.id)
- Set as.id to -1 when reusing an address space from the LRU list
- Drop misleading comment about page faults
- Remove check for irq being assigned in panthor_mmu_unplug()
Co-developed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Steven Price <steven.price@arm.com> # MIT+GPL2 relicensing,Arm
Acked-by: Grant Likely <grant.likely@linaro.org> # MIT+GPL2 relicensing,Linaro
Acked-by: Boris Brezillon <boris.brezillon@collabora.com> # MIT+GPL2 relicensing,Collabora
Reviewed-by: Steven Price <steven.price@arm.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240229162230.2634044-8-boris.brezillon@collabora.com
Every thing related to devfreq in placed in panthor_devfreq.c, and
helpers that can be called by other logical blocks are exposed through
panthor_devfreq.h.
This implementation is loosely based on the panfrost implementation,
the only difference being that we don't count device users, because
the idle/active state will be managed by the scheduler logic.
v6:
- Add Maxime's and Heiko's acks
- Keep header inclusion alphabetically ordered
v4:
- Add Clément's A-b for the relicensing
v3:
- Add acks for the MIT/GPL2 relicensing
v2:
- Added in v2
Cc: Clément Péron <peron.clem@gmail.com> # MIT+GPL2 relicensing
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Steven Price <steven.price@arm.com> # MIT+GPL2 relicensing,Arm
Acked-by: Grant Likely <grant.likely@linaro.org> # MIT+GPL2 relicensing,Linaro
Acked-by: Boris Brezillon <boris.brezillon@collabora.com> # MIT+GPL2 relicensing,Collabora
Acked-by: Clément Péron <peron.clem@gmail.com> # MIT+GPL2 relicensing
Acked-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240229162230.2634044-7-boris.brezillon@collabora.com
Anything relating to GEM object management is placed here. Nothing
particularly interesting here, given the implementation is based on
drm_gem_shmem_object, which is doing most of the work.
v6:
- Add Maxime's and Heiko's acks
- Return a page-aligned BO size to userspace when creating a BO
- Keep header inclusion alphabetically ordered
v5:
- Add Liviu's and Steve's R-b
v4:
- Force kernel BOs to be GPU mapped
- Make panthor_kernel_bo_destroy() robust against ERR/NULL BO pointers
to simplify the call sites
v3:
- Add acks for the MIT/GPL2 relicensing
- Provide a panthor_kernel_bo abstraction for buffer objects managed by
the kernel (will replace panthor_fw_mem and be used everywhere we were
using panthor_gem_create_and_map() before)
- Adjust things to match drm_gpuvm changes
- Change return of panthor_gem_create_with_handle() to int
Co-developed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Steven Price <steven.price@arm.com> # MIT+GPL2 relicensing,Arm
Acked-by: Grant Likely <grant.likely@linaro.org> # MIT+GPL2 relicensing,Linaro
Acked-by: Boris Brezillon <boris.brezillon@collabora.com> # MIT+GPL2 relicensing,Collabora
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240229162230.2634044-6-boris.brezillon@collabora.com
Handles everything that's not related to the FW, the MMU or the
scheduler. This is the block dealing with the GPU property retrieval,
the GPU block power on/off logic, and some global operations, like
global cache flushing.
v6:
- Add Maxime's and Heiko's acks
v5:
- Fix GPU_MODEL() kernel doc
- Fix test in panthor_gpu_block_power_off()
- Add Steve's R-b
v4:
- Expose CORE_FEATURES through DEV_QUERY
v3:
- Add acks for the MIT/GPL2 relicensing
- Use macros to extract GPU ID info
- Make sure we reset clear pending_reqs bits when wait_event_timeout()
times out but the corresponding bit is cleared in GPU_INT_RAWSTAT
(can happen if the IRQ is masked or HW takes to long to call the IRQ
handler)
- GPU_MODEL now takes separate arch and product majors to be more
readable.
- Drop GPU_IRQ_MCU_STATUS_CHANGED from interrupt mask.
- Handle GPU_IRQ_PROTM_FAULT correctly (don't output registers that are
not updated for protected interrupts).
- Minor code tidy ups
Cc: Alexey Sheplyakov <asheplyakov@basealt.ru> # MIT+GPL2 relicensing
Co-developed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Steven Price <steven.price@arm.com> # MIT+GPL2 relicensing,Arm
Acked-by: Grant Likely <grant.likely@linaro.org> # MIT+GPL2 relicensing,Linaro
Acked-by: Boris Brezillon <boris.brezillon@collabora.com> # MIT+GPL2 relicensing,Collabora
Reviewed-by: Steven Price <steven.price@arm.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240229162230.2634044-5-boris.brezillon@collabora.com
The panthor driver is designed in a modular way, where each logical
block is dealing with a specific HW-block or software feature. In order
for those blocks to communicate with each other, we need a central
panthor_device collecting all the blocks, and exposing some common
features, like interrupt handling, power management, reset, ...
This what this panthor_device logical block is about.
v6:
- Add Maxime's and Heiko's acks
- Keep header inclusion alphabetically ordered
v5:
- Suspend the MMU/GPU blocks if panthor_fw_resume() fails in
panthor_device_resume()
- Move the pm_runtime_use_autosuspend() call before drm_dev_register()
- Add Liviu's R-b
v4:
- Check drmm_mutex_init() return code
- Fix panthor_device_reset_work() out path
- Fix the race in the unplug logic
- Fix typos
- Unplug blocks when something fails in panthor_device_init()
- Add Steve's R-b
v3:
- Add acks for the MIT+GPL2 relicensing
- Fix 32-bit support
- Shorten the sections protected by panthor_device::pm::mmio_lock to fix
lock ordering issues.
- Rename panthor_device::pm::lock into panthor_device::pm::mmio_lock to
better reflect what this lock is protecting
- Use dev_err_probe()
- Make sure we call drm_dev_exit() when something fails half-way in
panthor_device_reset_work()
- Replace CSF_GPU_LATEST_FLUSH_ID_DEFAULT with a constant '1' and a
comment to explain. Also remove setting the dummy flush ID on suspend.
- Remove drm_WARN_ON() in panthor_exception_name()
- Check pirq->suspended in panthor_xxx_irq_raw_handler()
Co-developed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Steven Price <steven.price@arm.com> # MIT+GPL2 relicensing,Arm
Acked-by: Grant Likely <grant.likely@linaro.org> # MIT+GPL2 relicensing,Linaro
Acked-by: Boris Brezillon <boris.brezillon@collabora.com> # MIT+GPL2 relicensing,Collabora
Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240229162230.2634044-4-boris.brezillon@collabora.com
