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88 lines
4.4 KiB
88 lines
4.4 KiB
/*******************************************************************************
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Copyright (c) 2017 NVIDIA Corporation
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to
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deal in the Software without restriction, including without limitation the
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rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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sell copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*******************************************************************************/
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#ifndef __UVM_GPU_ACCESS_COUNTERS_H__
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#define __UVM_GPU_ACCESS_COUNTERS_H__
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#include "uvm_common.h"
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#include "uvm_forward_decl.h"
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#include "uvm_test_ioctl.h"
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NV_STATUS uvm_gpu_init_access_counters(uvm_parent_gpu_t *parent_gpu);
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void uvm_gpu_deinit_access_counters(uvm_parent_gpu_t *parent_gpu);
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bool uvm_gpu_access_counters_pending(uvm_parent_gpu_t *parent_gpu);
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void uvm_gpu_service_access_counters(uvm_gpu_t *gpu);
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void uvm_gpu_access_counter_buffer_flush(uvm_gpu_t *gpu);
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// Ignore or unignore access counters notifications. Ignoring means that the
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// bottom half is a no-op which just leaves notifications in the HW buffer
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// without being serviced and without inspecting any SW state.
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//
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// To avoid interrupt storms, access counter interrupts will be disabled while
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// ignored. Access counter bottom halves may still be scheduled in the top half
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// when other interrupts arrive and the top half sees that there are also
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// pending access counter notifications.
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//
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// When uningoring, the interrupt conditions will be re-evaluated to trigger
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// processing of buffered notifications, if any exist.
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void uvm_gpu_access_counters_set_ignore(uvm_gpu_t *gpu, bool do_ignore);
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// Return whether the VA space has access counter migrations enabled. The
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// caller must ensure that the VA space cannot go away.
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bool uvm_va_space_has_access_counter_migrations(uvm_va_space_t *va_space);
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// Global perf initialization/cleanup functions
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NV_STATUS uvm_perf_access_counters_init(void);
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void uvm_perf_access_counters_exit(void);
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// VA space Initialization/cleanup functions. See comments in
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// uvm_perf_heuristics.h
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NV_STATUS uvm_perf_access_counters_load(uvm_va_space_t *va_space);
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void uvm_perf_access_counters_unload(uvm_va_space_t *va_space);
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// Check whether access counters should be enabled when the given GPU is
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// registered on any VA space.
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bool uvm_gpu_access_counters_required(const uvm_parent_gpu_t *parent_gpu);
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// Functions used to enable/disable access counters on a GPU in the given VA
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// space.
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//
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// A per-GPU reference counter tracks the number of VA spaces in which access
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// counters are currently enabled. The hardware notifications and interrupts on
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// the GPU are enabled the first time any VA space invokes
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// uvm_gpu_access_counters_enable, and disabled when the last VA space invokes
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// uvm_gpu_access_counters_disable
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//
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// Locking: the VA space lock must not be held by the caller since these
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// functions may take the access counters ISR lock.
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NV_STATUS uvm_gpu_access_counters_enable(uvm_gpu_t *gpu, uvm_va_space_t *va_space);
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void uvm_gpu_access_counters_disable(uvm_gpu_t *gpu, uvm_va_space_t *va_space);
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NV_STATUS uvm_test_access_counters_enabled_by_default(UVM_TEST_ACCESS_COUNTERS_ENABLED_BY_DEFAULT_PARAMS *params,
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struct file *filp);
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NV_STATUS uvm_test_reconfigure_access_counters(UVM_TEST_RECONFIGURE_ACCESS_COUNTERS_PARAMS *params, struct file *filp);
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NV_STATUS uvm_test_reset_access_counters(UVM_TEST_RESET_ACCESS_COUNTERS_PARAMS *params, struct file *filp);
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NV_STATUS uvm_test_set_ignore_access_counters(UVM_TEST_SET_IGNORE_ACCESS_COUNTERS_PARAMS *params, struct file *filp);
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#endif // __UVM_GPU_ACCESS_COUNTERS_H__
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