131 lines
3.2 KiB
C
131 lines
3.2 KiB
C
/*
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* Copyright © 2019 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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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 DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <errno.h>
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#include <string.h>
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#include "ioctl_wrappers.h"
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#include "drmtest.h"
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#include "i915/gem_vm.h"
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/**
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* SECTION:gem_vm
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* @short_description: Helpers for dealing with address spaces (vm/GTT)
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* @title: GEM Virtual Memory
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*
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* This helper library contains functions used for handling gem address
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* spaces.
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*/
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/**
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* gem_has_vm:
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* @i915: open i915 drm file descriptor
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*
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* Returns: whether VM creation is supported or not.
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*/
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bool gem_has_vm(int i915)
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{
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uint32_t vm_id = 0;
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__gem_vm_create(i915, &vm_id);
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if (vm_id)
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gem_vm_destroy(i915, vm_id);
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return vm_id;
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}
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/**
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* gem_require_vm:
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* @i915: open i915 drm file descriptor
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*
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* This helper will automatically skip the test on platforms where address
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* space creation is not available.
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*/
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void gem_require_vm(int i915)
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{
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igt_require(gem_has_vm(i915));
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}
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int __gem_vm_create(int i915, uint32_t *vm_id)
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{
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struct drm_i915_gem_vm_control ctl = {};
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int err = 0;
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if (igt_ioctl(i915, DRM_IOCTL_I915_GEM_VM_CREATE, &ctl) == 0) {
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*vm_id = ctl.vm_id;
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} else {
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err = -errno;
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igt_assume(err != 0);
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}
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errno = 0;
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return err;
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}
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/**
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* gem_vm_create:
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* @i915: open i915 drm file descriptor
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*
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* This wraps the VM_CREATE ioctl, which is used to allocate a new
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* address space for use with GEM contexts.
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*
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* Returns: The id of the allocated address space.
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*/
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uint32_t gem_vm_create(int i915)
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{
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uint32_t vm_id;
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igt_assert_eq(__gem_vm_create(i915, &vm_id), 0);
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igt_assert(vm_id != 0);
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return vm_id;
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}
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int __gem_vm_destroy(int i915, uint32_t vm_id)
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{
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struct drm_i915_gem_vm_control ctl = { .vm_id = vm_id };
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int err = 0;
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if (igt_ioctl(i915, DRM_IOCTL_I915_GEM_VM_DESTROY, &ctl)) {
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err = -errno;
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igt_assume(err);
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}
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errno = 0;
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return err;
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}
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/**
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* gem_vm_destroy:
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* @i915: open i915 drm file descriptor
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* @vm_id: i915 VM id
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*
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* This wraps the VM_DESTROY ioctl, which is used to free an address space
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* handle.
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*/
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void gem_vm_destroy(int i915, uint32_t vm_id)
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{
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igt_assert_eq(__gem_vm_destroy(i915, vm_id), 0);
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}
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