This patch adds the process module and three helper modules:
- kfd_process, which handles process which open /dev/kfd
- kfd_doorbell, which provides helper functions for doorbell allocation,
release and mapping to userspace
- kfd_pasid, which provides helper functions for pasid allocation and release
- kfd_aperture, which provides helper functions for managing the LDS, Local GPU
memory and Scratch memory apertures of the process
This patch only contains the basic kfd_process module, which doesn't contain
the reference to the queue scheduler. This was done to allow easier code review.
Also, this patch doesn't contain the calls to the IOMMU driver for binding the
pasid to the device. Again, this was done to allow easier code review
The kfd_process object is created when a process opens /dev/kfd and is closed
when the mm_struct of that process is teared-down.
v3:
Removed kfd_vidmem.c file
Replaced direct mmput call to mmu_notifier release
Removed typedefs
Moved bool field to end of the structure
Added new kernel params for gart usage limitation
Added initialization of sa manager
Fixed debug messages
Remove support for LDS in 32 bit
Changed code to support mmap of doorbell pages from userspace
Added documentation for apertures
v4: Replaced RCU by SRCU for kfd_process list management
v5:
Move amdkfd from drm/radeon/ to drm/amd/
Rename kfd_aperture.c to kfd_flat_memory.c
Protect against multiple init calls
MQD size is H/W dependent so moved it to device info structure
Rename kfd_mem_obj structure's members
Use delayed function for process tear-down
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
This patch adds the topology module to the driver. The topology is exposed to
userspace through the sysfs.
The calls to add and remove a device to/from topology are done by the radeon
driver.
v3:
The CPU information, that is provided in the topology section of the amdkfd
driver, is extracted from the CRAT table. Unlike the CPU information located
in /sys/devices/system/cpu/cpu*, which is extracted from the SRAT table.
While the CPU information provided by the CRAT and the SRAT tables might be
identical, the node topology might be different. The SRAT table contains the
topology of CPU nodes only. The CRAT table contains the topology of CPU and GPU
nodes together (and can be interleaved). For example CPU node 1 in SRAT can be
CPU node 3 in CRAT. Furthermore it's worth to mention that the CRAT table
contains only HSA compatible nodes (nodes which are compliant with the HSA
spec).
To recap, amdkfd exposes a different kind of topology than the one exposed by
/sys/devices/system/cpu/cpu even though it may contain similar information.
v4:
The topology module doesn't support uevent handling and doesn't notify the
userspace about runtime modifications. It is up to the userspace to acquire
snapshots of the topology information created by the amdkfd and exposed
in sysfs.
The following is an example of how the topology looks on a Kaveri A10-7850K
system with amdkfd installed:
/sys/devices/virtual/kfd/kfd/
|
--- topology/
|
|--- generation_id
|--- system_properties
|--- nodes/
|
|--- 0/
|
|--- gpu_id
|--- name
|--- properties
|--- caches/
|
|--- 0/
|
|--- properties
|--- 1/
|
|--- properties
|--- 2/
|
|--- properties
|--- io_links/
|
|--- mem_banks/
|
|--- 0/
|
|--- properties
|--- 1/
|
|--- properties
|--- 2/
|
|--- properties
|--- 3/
|
|--- properties
v5:
Move amdkfd from drm/radeon/ to drm/amd/
Add a check if dev->gpu pointer is null before accessing it in the
node_show function in kfd_topology.c
This situation may occur when amdkfd is loaded and there is a GPU with a CRAT
table, but that GPU isn't supported by amdkfd
Signed-off-by: Evgeny Pinchuk <evgeny.pinchuk@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
This patch adds the amdkfd skeleton driver. The driver does nothing except
define a /dev/kfd device.
It returns -ENODEV on all amdkfd IOCTLs.
v3: Move bool field to the end of structure, removed the pmc ioctls and added
a meaningful error message for ioctl error.
v5:
Create a new folder drm/amd and move amdkfd from drm/radeon/ to drm/amd/
Remove scheduler_class from kfd_priv.h as it was never used
Add skeleton implementation of the Get Version IOCTL
v6:
Update module version to the correct number and remove the "default m" from the
Kconfig file
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
This patch adds the interface between the radeon driver and the amdkfd driver.
The interface implementation is contained in radeon_kfd.c and radeon_kfd.h.
The interface itself is represented by a pointer to struct
kfd_dev. The pointer is located inside radeon_device structure.
All the register accesses that amdkfd need are done using this interface. This
allows us to avoid direct register accesses in amdkfd proper, while also
avoiding locking between amdkfd and radeon.
The single exception is the doorbells that are used in both of the drivers.
However, because they are located in separate pci bar pages, the danger of
sharing registers between the drivers is minimal.
Having said that, we are planning to move the doorbells as well to radeon.
v3:
Add interface for sa manager init and fini. The init function will allocate a
buffer on system memory and pin it to the GART address space via the radeon sa
manager.
All mappings of buffers to GART address space are done via the radeon sa
manager. The interface of allocate memory will use the radeon sa manager to sub
allocate from the single buffer that was allocated during the init function.
Change lower_32/upper_32 calls to use linux macros
Add documentation for the interface
v4:
Change ptr field type in kgd_mem from uint32_t* to void* to match to type that
is returned by radeon_sa_bo_cpu_addr
v5:
Change format of mqd structure to work with latest KV firmware
Add support for AQL queues creation to enable working with open-source HSA
runtime.
Move generic kfd-->kgd interface and other generic kgd definitions to a generic
header file that will be used by AMD's radeon and amdgpu drivers
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
