wireguard-linux/drivers/gpu/drm/etnaviv, branch jd/unified-crypt-queue

drm/etnaviv: fix TS cache flushing on GPUs with BLT engine

2020-03-20T17:40:44Z

As seen in the Vivante kernel driver, most GPUs with the BLT engine have a broken TS cache flush. The workaround is to temporarily set the BLT command to CLEAR_IMAGE, without actually executing the clear. Apparently this state change is enough to trigger the required TS cache flush. As the BLT engine is completely asychronous, we also need a few more stall states to synchronize the flush with the frontend. Root-caused-by: Jonathan Marek Signed-off-by: Lucas Stach

drm/etnaviv: request pages from DMA32 zone when needed

2020-03-20T17:40:44Z

Some Vivante GPUs are found in systems that have interconnects restricted to 32 address bits, but may have system memory mapped above the 4GB mark. As this region isn't accessible to the GPU via DMA any GPU memory allocated in the upper part needs to go through SWIOTLB bounce buffering. This kills performance if it happens too often, as well as overrunning the available bounce buffer space, as the GPU buffer may stay mapped for a long time. Avoid bounce buffering by checking the addressing restrictions. If the GPU is unable to access memory above the 4GB mark, request our SHM buffers to be located in the DMA32 zone. Signed-off-by: Lucas Stach

drm/etnaviv: Replace zero-length array with flexible-array member

2020-03-05T11:15:46Z

The current codebase makes use of the zero-length array language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as these ones is a flexible array member[1][2], introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being inadvertently introduced[3] to the codebase from now on. Also, notice that, dynamic memory allocations won't be affected by this change: "Flexible array members have incomplete type, and so the sizeof operator may not be applied. As a quirk of the original implementation of zero-length arrays, sizeof evaluates to zero."[1] This issue was found with the help of Coccinelle. [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [2] https://github.com/KSPP/linux/issues/21 [3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour") Signed-off-by: Gustavo A. R. Silva Signed-off-by: Lucas Stach

drm/etnaviv: Warn when GPU doesn't idle fast enough

2020-03-03T09:58:57Z

If the GPU isn't idle after signalling pm_runtime_mark_last_busy() plus waiting for the autosuspend delay there's likely something wrong with the way we check idleness so warn about that. Signed-off-by: Guido Günther Signed-off-by: Lucas Stach

drm/etnaviv: Ignore MC when checking runtime suspend idleness

2020-03-03T09:58:57Z

Without that runtime suspend is often blocked due to etnaviv_gpu_rpm_suspend() returning -EBUSY since the FE seems to trigger the MC in its idle loop. Ignoring the MC bit makes the GPU suspend as expected. This was tested on GC7000. Signed-off-by: Guido Günther Signed-off-by: Lucas Stach

drm/etnaviv: Consider all kwnown idle bits in debugfs

2020-03-03T09:58:57Z

We were missing out on some bits the vendor kernel driver knows about. Signed-off-by: Guido Günther Signed-off-by: Lucas Stach

drm/etnaviv: Update idle bits

2020-03-03T09:58:57Z

Update the state HI and common header from rnndb commit commit 19280a95a (rnndb: Update idle bits) Signed-off-by: Guido Günther Signed-off-by: Lucas Stach

drm/etnaviv: Fix typo in comment

2020-03-03T09:58:57Z

Use 'is' instead of 'it' so it becomes a valid sentence and spell 'resetting' correctly. Signed-off-by: Guido Günther Signed-off-by: Lucas Stach

drm/etnaviv: rework perfmon query infrastructure

2020-03-03T09:58:06Z

Report the correct perfmon domains and signals depending on the supported feature flags. Reported-by: Dan Carpenter Fixes: 9e2c2e273012 ("drm/etnaviv: add infrastructure to query perf counter") Cc: stable@vger.kernel.org Signed-off-by: Christian Gmeiner Signed-off-by: Lucas Stach

drm/etnaviv: add hwdb entry for gc400 found in STM32

2020-02-26T15:20:04Z

The information was taken from STM32 glacore driver hw database. The entry is named as gc7000nano_0x4652. Signed-off-by: Christian Gmeiner Signed-off-by: Lucas Stach