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      1 /*	$NetBSD: mock_gtt.c,v 1.2 2021/12/18 23:45:31 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright  2016 Intel Corporation
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice (including the next
     14  * paragraph) shall be included in all copies or substantial portions of the
     15  * Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
     23  * IN THE SOFTWARE.
     24  *
     25  */
     26 
     27 #include <sys/cdefs.h>
     28 __KERNEL_RCSID(0, "$NetBSD: mock_gtt.c,v 1.2 2021/12/18 23:45:31 riastradh Exp $");
     29 
     30 #include "mock_gtt.h"
     31 
     32 static void mock_insert_page(struct i915_address_space *vm,
     33 			     dma_addr_t addr,
     34 			     u64 offset,
     35 			     enum i915_cache_level level,
     36 			     u32 flags)
     37 {
     38 }
     39 
     40 static void mock_insert_entries(struct i915_address_space *vm,
     41 				struct i915_vma *vma,
     42 				enum i915_cache_level level, u32 flags)
     43 {
     44 }
     45 
     46 static int mock_bind_ppgtt(struct i915_vma *vma,
     47 			   enum i915_cache_level cache_level,
     48 			   u32 flags)
     49 {
     50 	GEM_BUG_ON(flags & I915_VMA_GLOBAL_BIND);
     51 	set_bit(I915_VMA_LOCAL_BIND_BIT, __i915_vma_flags(vma));
     52 	return 0;
     53 }
     54 
     55 static void mock_unbind_ppgtt(struct i915_vma *vma)
     56 {
     57 }
     58 
     59 static void mock_cleanup(struct i915_address_space *vm)
     60 {
     61 }
     62 
     63 static void mock_clear_range(struct i915_address_space *vm,
     64 			     u64 start, u64 length)
     65 {
     66 }
     67 
     68 struct i915_ppgtt *mock_ppgtt(struct drm_i915_private *i915, const char *name)
     69 {
     70 	struct i915_ppgtt *ppgtt;
     71 
     72 	ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
     73 	if (!ppgtt)
     74 		return NULL;
     75 
     76 	ppgtt->vm.gt = &i915->gt;
     77 	ppgtt->vm.i915 = i915;
     78 	ppgtt->vm.total = round_down(U64_MAX, PAGE_SIZE);
     79 	ppgtt->vm.file = ERR_PTR(-ENODEV);
     80 
     81 	i915_address_space_init(&ppgtt->vm, VM_CLASS_PPGTT);
     82 
     83 	ppgtt->vm.clear_range = mock_clear_range;
     84 	ppgtt->vm.insert_page = mock_insert_page;
     85 	ppgtt->vm.insert_entries = mock_insert_entries;
     86 	ppgtt->vm.cleanup = mock_cleanup;
     87 
     88 	ppgtt->vm.vma_ops.bind_vma    = mock_bind_ppgtt;
     89 	ppgtt->vm.vma_ops.unbind_vma  = mock_unbind_ppgtt;
     90 	ppgtt->vm.vma_ops.set_pages   = ppgtt_set_pages;
     91 	ppgtt->vm.vma_ops.clear_pages = clear_pages;
     92 
     93 	return ppgtt;
     94 }
     95 
     96 static int mock_bind_ggtt(struct i915_vma *vma,
     97 			  enum i915_cache_level cache_level,
     98 			  u32 flags)
     99 {
    100 	atomic_or(I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND, &vma->flags);
    101 	return 0;
    102 }
    103 
    104 static void mock_unbind_ggtt(struct i915_vma *vma)
    105 {
    106 }
    107 
    108 void mock_init_ggtt(struct drm_i915_private *i915, struct i915_ggtt *ggtt)
    109 {
    110 	memset(ggtt, 0, sizeof(*ggtt));
    111 
    112 	ggtt->vm.gt = &i915->gt;
    113 	ggtt->vm.i915 = i915;
    114 	ggtt->vm.is_ggtt = true;
    115 
    116 	ggtt->gmadr = (struct resource) DEFINE_RES_MEM(0, 2048 * PAGE_SIZE);
    117 	ggtt->mappable_end = resource_size(&ggtt->gmadr);
    118 	ggtt->vm.total = 4096 * PAGE_SIZE;
    119 
    120 	ggtt->vm.clear_range = mock_clear_range;
    121 	ggtt->vm.insert_page = mock_insert_page;
    122 	ggtt->vm.insert_entries = mock_insert_entries;
    123 	ggtt->vm.cleanup = mock_cleanup;
    124 
    125 	ggtt->vm.vma_ops.bind_vma    = mock_bind_ggtt;
    126 	ggtt->vm.vma_ops.unbind_vma  = mock_unbind_ggtt;
    127 	ggtt->vm.vma_ops.set_pages   = ggtt_set_pages;
    128 	ggtt->vm.vma_ops.clear_pages = clear_pages;
    129 
    130 	i915_address_space_init(&ggtt->vm, VM_CLASS_GGTT);
    131 	i915->gt.ggtt = ggtt;
    132 }
    133 
    134 void mock_fini_ggtt(struct i915_ggtt *ggtt)
    135 {
    136 	i915_address_space_fini(&ggtt->vm);
    137 }
    138