Add a function to check if an nvgpu_mem is allocated (valid) or not.
Also fix possibly leaked state in nvgpu_mems when they fail to
allocate.
Also ensure that in the case of a failure to allocate no state is
accidentally leaked to the caller. This should hopefully make it
less likely that a caller thinks a buffer that failed to allocate
is actually allocated.
Change-Id: I43224ece7da84e63b2f43f36f04941126fabf3c7
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1559419
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Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Explicitly page align DMA memory allocations. Non-page aligned
DMA allocs can lead to nvgpu_mem structs that have a size that's
not page aligned. Those allocs, in some cases, can cause vGPU
maps to return an error.
More generally DMA allocs in Linux are never going to not be
page aligned both in size and address. So might as well page align
the alloc size to make code else where in the driver more simple.
To imlpement this an aligned_size field has been added to struct
nvgpu_mem. This field has the real page aligned size of the
allocation. The original size is still saved in size.
Change-Id: Ie08cfc4f39d5f97db84a54b8e314ad1fa53b72be
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1547902
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Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Fix kernel warnings for GPUs with real vidmem:
- dma.c: in nvgpu_dma_alloc_flags, ignore incoming flags when using vidmem,
since anything but NVGPU_DMA_NO_KERNEL_MAPPING will end up generating
kernel warnings, and the vidmem mapping functions ignore the other flags
anyway.
- gmmu.c: in __nvgpu_gmmu_update_page_table, use appropriate function for
memory type to retrieve physical address
Bug 1967748
Change-Id: I6fc01fd5f2c5cd7b81cba70ab59cc3c8fe4cda19
Signed-off-by: Peter Daifuku <pdaifuku@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1530877
Reviewed-by: Alex Waterman <alexw@nvidia.com>
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Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
As the vidmem_is_vidmem flag has got two separate meanings in one bit,
split it in two bits into the enabled() API:
Add NVGPU_MM_HONORS_APERTURE bit, which is the same as vidmem_is_vidmem
with its original meaning, and use it to test which aperture bits to
write to hardware.
Add NVGPU_MM_UNIFIED_MEMORY bit, which has the opposite meaning: that
the GPU shares the SoC memory. When this flag is false, the GPU has its
own local video memory.
Jira NVGPU-86
Change-Id: I2d0bed3b1ede5a712be99323d3035b154bb23c3a
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/1496080
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Remove gk20a_platform dependencies from gk20a.h. This makes
gk20a_platform a Linux platform specific data structure. Add #include
for platform_gk20a.h in the source files that still depend on Linux.
JIRA NVGPU-16
Change-Id: Ib098accd34a1f5066eb8680c387f9b178169f3f0
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1463547
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Begin moving (and renaming) the GMMU code into common/mm/gmmu.c. This
block of code will be responsible for handling the platform/OS
independent GMMU operations.
JIRA NVGPU-12
JIRA NVGPU-30
Change-Id: Ide761bab75e5d84be3dcb977c4842ae4b3a7c1b3
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1464083
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Add a function to create a nvgpu_mem from a list of arbitrary pages.
This API is useful for pages not necessarily allocated by the Linux
page allocator. It is useful for making nvgpu_mems that represent
carveouts or other things like that.
JIRA NVGPU-12
JIRA NVGPU-30
Change-Id: Ibcb6432f077a6b0ecf9d183248e47a1f9ecb3ddd
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1464080
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Replace a couple of boolean fields in nvgpu_mem with bits in a
bitmap introduced in an earlier patch.
JIRA NVGPU-12
JIRA NVGPU-30
Change-Id: Iffc31bd629cab9a37e5a4fd13377eb9090353410
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1464079
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
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Move and rename the functions that build sgtables for nvgpu_mems into
the Linux specific DMA code.
One place outside of the Linux code do include the Linux DMA header.
That will be fixed in a subsequent patch.
JIRA NVGPU-12
JIRA NVGPU-30
Change-Id: Ie43c752b8f998f122af70f7c7eb727af0b0d98df
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1464078
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Add an API for creating a special sub-nvgpu_mem struct. This struct
comes with some fairly important caveats but is very useful for the
semaphore code.
Also, make sure that in nvgpu_mem_begin() and nvgpu_mem_end() no
additional mappings are made if not necessary. More importantly during
nvgpu_mem_end() it would be possible to vunmap() a CPU mapping of a
DMA allocation that does not expect this to happen.
JIRA NVGPU-12
JIRA NVGPU-30
Change-Id: I579429da9ff7288488753a113bafc558e0f17a0f
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1464077
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Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
Hide the Linux specific nvgpu_mem fields so that in subsequent patches
core code can instead of using struct sg_table it can use mem_desc.
Routines for accessing system specific fields will be added as needed.
This is the first step in a fairly major overhaul of the GMMU mapping
routines. There are numerous issues with the current design (or lack
there of): massively coupled code, system dependencies, disorganization,
etc.
JIRA NVGPU-12
JIRA NVGPU-30
Change-Id: I2e7d3ae3a07468cfc17c1c642d28ed1b0952474d
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1464076
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Rename the nvgpu DMA APIs from gk20a_gmmu_alloc* to nvgpu_dma_alloc*.
This better reflects the purpose of the APIs (to allocate DMA suitable
memory) and avoids confusion with GMMU related code.
JIRA NVGPU-12
Change-Id: I673d607db56dd6e44f02008dc7b5293209ef67bf
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1325548
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Make an nvgpu DMA API include file so that the intricacies of the
Linux DMA API can be hidden from the calling code.
Also document the nvgpu DMA API.
JIRA NVGPU-12
Change-Id: I7578e4c726ad46344b7921179d95861858e9a27e
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1323326
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