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path: root/drivers/gpu/drm/amd/amdkfd/kfd_module.c (follow)
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2022-02-14drm/amdkfd: update SPDX license headerRajneesh Bhardwaj1-1/+2
Update the SPDX License header for all the KFD files. Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-09-22drm/amdgpu: Fix handling of KFD initialization failuresFelix Kuehling1-0/+1
Remember KFD module initializaton status in a global variable. Skip KFD device probing when the module was not initialized. Other amdgpu_amdkfd calls are then protected by the adev->kfd.dev check. Also print a clear error message when KFD disables itself. Amdgpu continues its initialization even when KFD failed. Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Reviewed-by: Kent Russell <kent.russell@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-10-07drm/amdkfd: add missing void argument to function kgd2kfd_initColin Ian King1-1/+1
Function kgd2kfd_init is missing a void argument, add it to clean up the non-ANSI function declaration. Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-06-20drm/amdkfd: Add procfs-style information for KFD processesKent Russell1-0/+6
Add a folder structure to /sys/class/kfd/kfd/ called proc which contains subfolders, each representing an active KFD process' PID, containing 1 file: pasid. Signed-off-by: Kent Russell <kent.russell@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-01-14drm/amdgpu: Remove kgd2kfd function pointersAmber Lin1-27/+2
kgd2kfd function pointers and global kgd2kfd pointer are no longer in use. Signed-off-by: Amber Lin <Amber.Lin@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-01-14drm/amdgpu: Relocate kgd2kfd function declarationAmber Lin1-1/+1
Since amdkfd is merged into amdgpu module and amdgpu can access amdkfd directly, move declaration of kgd2kfd functions from kfd_priv.h to amdgpu_amdkfd.h Signed-off-by: Amber Lin <Amber.Lin@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2018-08-28drm/amdgpu: Move KFD parameters to amdgpu (v3)Amber Lin1-45/+0
After merging KFD into amdgpu, move module parameters defined in KFD to amdgpu_drv.c, where other module parameters are declared. v2: add kernel-doc comments v3: rebase and fix parameter variable name (Alex) Signed-off-by: Amber Lin <Amber.Lin@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2018-08-28drm/amdgpu: Merge amdkfd into amdgpuAmber Lin1-55/+22
Since KFD is only supported by single GPU driver, it makes sense to merge amdgpu and amdkfd into one module. This patch is the initial step: merge Kconfig and Makefile. v2: also remove kfd from drm Kconfig Signed-off-by: Amber Lin <Amber.Lin@amd.com> Acked-by: Christian König <christian.koenig@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2018-07-11drm/amdkfd: Use module parameters noretry as the internal variable nameYong Zhao1-6/+8
This makes all module parameters use the same form. Meanwhile clean up the surrounding code. Signed-off-by: Yong Zhao <yong.zhao@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2018-07-11drm/amdkfd: Introduce KFD module parameter halt_if_hws_hangYong Zhao1-0/+4
This avoids triggering a GPU reset or otherwise changing the HW state. Instead KFD will hang, which allows HW debugging tools to analyze the problem. Signed-off-by: Yong Zhao <yong.zhao@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2018-07-11drm/amdkfd: Add gpu reset interface and place holderShaoyun Liu1-0/+2
Signed-off-by: Shaoyun Liu <Shaoyun.Liu@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2018-04-10drm/amdkfd: Add GFXv9 device queue managerFelix Kuehling1-0/+5
Signed-off-by: John Bridgman <john.bridgman@amd.com> Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2018-03-23drm/amdkfd: Add quiesce_mm and resume_mm to kgd2kfd_callsFelix Kuehling1-0/+2
These interfaces allow KGD to stop and resume all GPU user mode queue access to a process address space. This is needed for handling MMU notifiers of userptrs mapped for GPU access in KFD VMs. Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2018-03-23drm/amdkfd: Use ordered workqueue to restore processesFelix Kuehling1-1/+5
Restoring multiple processes concurrently can lead to live-locks where each process prevents the other from validating all its BOs. v2: fix duplicate check of same variable Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2018-03-15drm/amdkfd: Add module option for testing large-BAR functionalityFelix Kuehling1-0/+5
Simulate large-BAR system by exporting only visible memory. This limits the amount of available VRAM to the size of the BAR, but enables CPU access to VRAM. Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Acked-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2018-02-06drm/amdkfd: Implement KFD process eviction/restoreFelix Kuehling1-0/+2
When the TTM memory manager in KGD evicts BOs, all user mode queues potentially accessing these BOs must be evicted temporarily. Once user mode queues are evicted, the eviction fence is signaled, allowing the migration of the BO to proceed. A delayed worker is scheduled to restore all the BOs belonging to the evicted process and restart its queues. During suspend/resume of the GPU we also evict all processes to allow KGD to save BOs in system memory, since VRAM will be lost. v2: * Account for eviction when updating of q->is_active in MQD manager Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com> Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Acked-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2017-12-08drm/amdkfd: Module option to disable CRAT tableFelix Kuehling1-0/+5
Some systems have broken CRAT tables. Add a module option to ignore a CRAT table. Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2017-11-27drm/amdkfd: Add debugfs support to KFDFelix Kuehling1-0/+3
This commit adds several debugfs entries for kfd: kfd/hqds: dumps all HQDs on all GPUs for KFD-controlled compute and SDMA RLC queues kfd/mqds: dumps all MQDs of all KFD processes on all GPUs kfd/rls: dumps HWS runlists on all GPUs Signed-off-by: Yong Zhao <yong.zhao@amd.com> Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2017-11-27drm/amdkfd: map multiple processes to HW schedulerFelix Kuehling1-0/+5
Allow HWS to to execute multiple processes on the hardware concurrently. The number of concurrent processes is limited by the number of VMIDs allocated to the HWS. A module parameter can be used for limiting this further or turn it off altogether (mainly for debugging purposes). Signed-off-by: Yong Zhao <yong.zhao@amd.com> Signed-off-by: Jay Cornwall <Jay.Cornwall@amd.com> Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Acked-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2017-11-14drm/amdkfd: Add CWSR supportFelix Kuehling1-0/+4
This hardware feature allows the GPU to preempt shader execution in the middle of a compute wave, save the state and restore it later to resume execution. Memory for saving the state is allocated per queue in user mode and the address and size passed to the create_queue ioctl. The size depends on the number of waves that can be in flight simultaneously on a given ASIC. Signed-off-by: Shaoyun.liu <shaoyun.liu@amd.com> Signed-off-by: Yong Zhao <yong.zhao@amd.com> Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2017-11-26drm/amdkfd: fix amdkfd use-after-free GP faultRandy Dunlap1-1/+2
Fix GP fault caused by dev_info() reference to a struct device* after the device has been freed (use after free). kfd_chardev_exit() frees the device so 'kfd_device' should not be used after calling kfd_chardev_exit(). Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2017-09-26drm/amdkfd: Use PASID manager from KGDFelix Kuehling1-6/+0
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-08-15drm/amdkfd: Fix goto usage v2Kent Russell1-2/+1
Remove gotos that do not feature any common cleanup, and use gotos instead of repeating cleanup commands. According to kernel.org: "The goto statement comes in handy when a function exits from multiple locations and some common work such as cleanup has to be done. If there is no cleanup needed then just return directly." v2: Applied review suggestions in create_queue_nocpsch Signed-off-by: Kent Russell <kent.russell@amd.com> Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2017-08-15drm/amdkfd: Consolidate and clean up log commandsKent Russell1-2/+2
Consolidate log commands so that dev_info(NULL, "Error...") uses the more accurate pr_err, remove the module name from the log (can be seen via dynamic debugging with +m), and the function name (can be seen via dynamic debugging with +f). We also don't need debug messages saying what function we're in. Those can be added by devs when needed Don't print vendor and device ID in error messages. They are typically the same for all GPUs in a multi-GPU system. So this doesn't add any value to the message. Lastly, remove parentheses around %d, %i and 0x%llX. According to kernel.org: "Printing numbers in parentheses (%d) adds no value and should be avoided." Signed-off-by: Kent Russell <kent.russell@amd.com> Signed-off-by: Yong Zhao <Yong.Zhao@amd.com> Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2017-08-15drm/amdkfd: Clean up KFD style errors and warnings v2Kent Russell1-1/+2
Using checkpatch.pl -f <file> showed a number of style issues. This patch addresses as many of them as possible. Some long lines have been left for readability, but attempts to minimize them have been made. v2: Broke long lines in gfx_v7 get_fw_version Signed-off-by: Kent Russell <kent.russell@amd.com> Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2016-02-27drm/amdkfd: Track when module's init is completeOded Gabbay1-3/+12
Current dependencies between amdkfd and radeon/amdgpu force the loading of amdkfd _before_ radeon and/or amdgpu are loaded. When all these kernel drivers are built as modules, this ordering is enforced by the kernel built-in mechanism of loading dependent modules. However, there is no such mechanism in case where all these drivers are compiled inside the kernel image (not as modules). The current way to enforce loading of amdkfd before radeon/amdgpu, is to put amdkfd before radeon/amdgpu in the drm Makefile, but that method is way too fragile. In addition, there is no kernel mechanism to check whether a kernel driver that is built inside the kernel image, has already been loaded. To solve this, this patch adds to kfd_module.c a new static variable, amdkfd_init_completed, that is set to 1 only when amdkfd's module initialization function has been completed (successfully). kgd2kfd_init(), which is the initialization function of the kgd-->kfd interface, and which is the first function in amdkfd called by radeon/amdgpu, will return successfully only if amdkfd_init_completed is equal 1. If amdkfd_init_completed is not equal to 1, kgd2kfd_init() will return -EPROBE_DEFER to signal radeon/amdgpu they need to defer their loading until amdkfd is loaded. Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
2015-05-19drm/amdkfd: change driver version to 0.7.2Oded Gabbay1-2/+2
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2015-05-19drm/amdkfd: Add module parameter of send_sigtermOded Gabbay1-0/+5
This patch adds a new kernel module parameter to amdkfd, called send_sigterm. This parameter specifies whether amdkfd should send the SIGTERM signal to an HSA process, when the following conditions occur: 1. The GPU triggers an exception regarding a kernel that was issued by this process. 2. The HSA process isn't waiting on an event that handles this exception. The default behavior is not to send a SIGTERM and suffice with a dmesg error print. Reviewed-by: Ben Goz <ben.goz@amd.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2015-03-25drm/amdkfd: Add multiple kgd supportXihan Zhang1-11/+1
The current code can only support one kgd instance. We have to support multiple kgd instances in one system. i.e two amdgpu or two radeon or one amdgpu + one radeon or more than two kgd instances. Signed-off-by: Xihan Zhang <xihan.zhang@amd.com> Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
2015-02-16Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linuxLinus Torvalds1-3/+3
Pull drm updates from Dave Airlie: "This is the main drm pull, it has a shared branch with some alsa crossover but everything should be acked by relevant people. New drivers: - ATMEL HLCDC driver - designware HDMI core support (used in multiple SoCs). core: - lots more atomic modesetting work, properties and atomic ioctl (hidden under option) - bridge rework allows support for Samsung exynos chromebooks to work finally. - some more panels supported i915: - atomic plane update support - DSI uses shared DSI infrastructure - Skylake basic support is all merged now - component framework used for i915/snd-hda interactions - write-combine cpu memory mappings - engine init code refactored - full ppgtt enabled where execlists are enabled. - cherryview rps/gpu turbo and pipe CRC support. radeon: - indirect draw support for evergreen/cayman - SMC and manual fan control for SI/CI - Displayport audio support amdkfd: - SDMA usermode queue support - replace suballocator usage with more suitable one - rework for allowing interfacing to more than radeon nouveau: - major renaming in prep for later splitting work - merge arm platform driver into nouveau - GK20A reclocking support msm: - conversion to atomic modesetting - YUV support for mdp4/5 - eDP support - hw cursor for mdp5 tegra: - conversion to atomic modesetting - better suspend/resume support for child devices rcar-du: - interlaced support imx: - move to using dw_hdmi shared support - mode_fixup support sti: - DVO support - HDMI infoframe support exynos: - refactoring and cleanup, removed lots of internal unnecessary abstraction - exynos7 DECON display controller support Along with the usual bunch of fixes, cleanups etc" * 'drm-next' of git://people.freedesktop.org/~airlied/linux: (724 commits) drm/radeon: fix voltage setup on hawaii drm/radeon/dp: Set EDP_CONFIGURATION_SET for bridge chips if necessary drm/radeon: only enable kv/kb dpm interrupts once v3 drm/radeon: workaround for CP HW bug on CIK drm/radeon: Don't try to enable write-combining without PAT drm/radeon: use 0-255 rather than 0-100 for pwm fan range drm/i915: Clamp efficient frequency to valid range drm/i915: Really ignore long HPD pulses on eDP drm/exynos: Add DECON driver drm/i915: Correct the base value while updating LP_OUTPUT_HOLD in MIPI_PORT_CTRL drm/i915: Insert a command barrier on BLT/BSD cache flushes drm/i915: Drop vblank wait from intel_dp_link_down drm/exynos: fix NULL pointer reference drm/exynos: remove exynos_plane_dpms drm/exynos: remove mode property of exynos crtc drm/exynos: Remove exynos_plane_dpms() call with no effect drm/i915: Squelch overzealous uncore reset WARN_ON drm/i915: Take runtime pm reference on hangcheck_info drm/i915: Correct the IOSF Dev_FN field for IOSF transfers drm/exynos: fix DMA_ATTR_NO_KERNEL_MAPPING usage ...
2015-02-02drm/amdkfd: max num of queues can't be 0Oded Gabbay1-2/+2
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com> Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
2015-01-29Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into drm-nextDave Airlie1-19/+8
This backmerges drm-fixes into drm-next mainly for the amdkfd stuff, I'm not 100% confident, but it builds and the amdkfd folks can fix anything up. Signed-off-by: Dave Airlie <airlied@redhat.com> Conflicts: drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h
2015-01-22drm/amdkfd: change amdkfd version to 0.7.1Oded Gabbay1-2/+2
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
2015-01-18drm/amdkfd: Allow user to limit only queues per deviceOded Gabbay1-19/+8
This patch replaces the two current amdkfd module parameters with a new one. The current parameters that are being replaced are: - Maximum number of HSA processes - Maximum number of queues per process The new parameter that replaces them is called "Maximum queues per device" This replacement achieves two goals: - Allows the user to have as many HSA processes as it wants (until a maximum of 512 HSA processes in Kaveri). - Removes the limitation the user had on maximum number of queues per HSA process. E.g. the user can now have processes which only have one queue and other processes which have hundreds of queues, while before the user couldn't have more than 128 queues per process (as default). The default value of the new parameter is 4096 (32 * 128, which were the defaults of the old parameters). There is almost no additional GART memory required for the default case. As a reminder, this amount of queues requires a little bit below 4MB of GART memory. v2: In addition, This patch defines a new counter for queues accounting in the DQM structure. This is done because the current counter only counts active queues which allows the user to create more queues than the max_num_of_queues_per_device module parameter allows. However, we need the current counter for the runlist packet build process, so the solution is to have a dedicated counter for this accounting. Signed-off-by: Oded Gabbay <oded.gabbay@amd.com> Reviewed-by: Ben Goz <ben.goz@amd.com>
2015-01-18drm/amdkfd: Fix description of sched_policy module parameterBen Goz1-1/+1
Signed-off-by: Ben Goz <ben.goz@amd.com> Signed-off-by: Oded Gabbay <oded.gabbay@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
2014-07-17amdkfd: Add module parameter of scheduling policyBen Goz1-0/+12
This patch adds a new parameter to the amdkfd driver. This parameter enables the user to select the scheduling policy of the CP. The choices are: * CP Scheduling with support for over-subscription * CP Scheduling without support for over-subscription * Without CP Scheduling Note that the third option (Without CP scheduling) is only for debug purposes and bringup of new H/W. As such, it is _not_ guaranteed to work at all times on all H/W versions. v3: Fixed description of parameter, changed the permissions to read_only, added a verification of the value and added documentation v5: Set default sched_policy to HWS as it is now supported by firmware Signed-off-by: Ben Goz <ben.goz@amd.com> Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
2014-07-16amdkfd: Add basic modules to amdkfdOded Gabbay1-1/+40
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>
2014-07-16amdkfd: Add topology module to amdkfdEvgeny Pinchuk1-0/+7
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>
2014-07-16amdkfd: Add amdkfd skeleton driverOded Gabbay1-0/+101
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>
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