1 // SPDX-License-Identifier: MIT 2 /* Copyright © 2024 Intel Corporation */ 3 4 #include <drm/drm_panic.h> 5 #include <drm/drm_print.h> 6 #include <drm/intel/display_parent_interface.h> 7 8 #include "display/intel_fb.h" 9 #include "gem/i915_gem_mman.h" 10 #include "gem/i915_gem_object.h" 11 #include "gem/i915_gem_object_frontbuffer.h" 12 #include "pxp/intel_pxp.h" 13 14 #include "i915_bo.h" 15 #include "i915_debugfs.h" 16 #include "i915_drv.h" 17 18 static bool i915_bo_is_tiled(struct drm_gem_object *obj) 19 { 20 return i915_gem_object_is_tiled(to_intel_bo(obj)); 21 } 22 23 static bool i915_bo_is_userptr(struct drm_gem_object *obj) 24 { 25 return i915_gem_object_is_userptr(to_intel_bo(obj)); 26 } 27 28 static bool i915_bo_is_shmem(struct drm_gem_object *obj) 29 { 30 return i915_gem_object_is_shmem(to_intel_bo(obj)); 31 } 32 33 static bool i915_bo_is_protected(struct drm_gem_object *obj) 34 { 35 return i915_gem_object_is_protected(to_intel_bo(obj)); 36 } 37 38 static int i915_bo_key_check(struct drm_gem_object *obj) 39 { 40 return intel_pxp_key_check(obj, false); 41 } 42 43 static int i915_bo_fb_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) 44 { 45 return i915_gem_fb_mmap(to_intel_bo(obj), vma); 46 } 47 48 static int i915_bo_read_from_page(struct drm_gem_object *obj, u64 offset, void *dst, int size) 49 { 50 return i915_gem_object_read_from_page(to_intel_bo(obj), offset, dst, size); 51 } 52 53 static void i915_bo_describe(struct seq_file *m, struct drm_gem_object *obj) 54 { 55 i915_debugfs_describe_obj(m, to_intel_bo(obj)); 56 } 57 58 static int i915_bo_framebuffer_init(struct drm_gem_object *_obj, 59 struct drm_mode_fb_cmd2 *mode_cmd) 60 { 61 struct drm_i915_gem_object *obj = to_intel_bo(_obj); 62 struct drm_i915_private *i915 = to_i915(obj->base.dev); 63 unsigned int tiling, stride; 64 65 i915_gem_object_lock(obj, NULL); 66 tiling = i915_gem_object_get_tiling(obj); 67 stride = i915_gem_object_get_stride(obj); 68 i915_gem_object_unlock(obj); 69 70 if (mode_cmd->flags & DRM_MODE_FB_MODIFIERS) { 71 /* 72 * If there's a fence, enforce that 73 * the fb modifier and tiling mode match. 74 */ 75 if (tiling != I915_TILING_NONE && 76 tiling != intel_fb_modifier_to_tiling(mode_cmd->modifier[0])) { 77 drm_dbg_kms(&i915->drm, 78 "tiling_mode doesn't match fb modifier\n"); 79 return -EINVAL; 80 } 81 } else { 82 if (tiling == I915_TILING_X) { 83 mode_cmd->modifier[0] = I915_FORMAT_MOD_X_TILED; 84 } else if (tiling == I915_TILING_Y) { 85 drm_dbg_kms(&i915->drm, 86 "No Y tiling for legacy addfb\n"); 87 return -EINVAL; 88 } 89 } 90 91 /* 92 * gen2/3 display engine uses the fence if present, 93 * so the tiling mode must match the fb modifier exactly. 94 */ 95 if (GRAPHICS_VER(i915) < 4 && 96 tiling != intel_fb_modifier_to_tiling(mode_cmd->modifier[0])) { 97 drm_dbg_kms(&i915->drm, 98 "tiling_mode must match fb modifier exactly on gen2/3\n"); 99 return -EINVAL; 100 } 101 102 /* 103 * If there's a fence, enforce that 104 * the fb pitch and fence stride match. 105 */ 106 if (tiling != I915_TILING_NONE && mode_cmd->pitches[0] != stride) { 107 drm_dbg_kms(&i915->drm, 108 "pitch (%d) must match tiling stride (%d)\n", 109 mode_cmd->pitches[0], stride); 110 return -EINVAL; 111 } 112 113 return 0; 114 } 115 116 static void i915_bo_framebuffer_fini(struct drm_gem_object *obj) 117 { 118 /* Nothing to do for i915 */ 119 } 120 121 static struct drm_gem_object * 122 i915_bo_framebuffer_lookup(struct drm_device *drm, 123 struct drm_file *filp, 124 const struct drm_mode_fb_cmd2 *mode_cmd) 125 { 126 struct drm_i915_private *i915 = to_i915(drm); 127 struct drm_i915_gem_object *obj; 128 129 obj = i915_gem_object_lookup(filp, mode_cmd->handles[0]); 130 if (!obj) 131 return ERR_PTR(-ENOENT); 132 133 /* object is backed with LMEM for discrete */ 134 if (HAS_LMEM(i915) && !i915_gem_object_can_migrate(obj, INTEL_REGION_LMEM_0)) { 135 /* object is "remote", not in local memory */ 136 i915_gem_object_put(obj); 137 drm_dbg_kms(&i915->drm, "framebuffer must reside in local memory\n"); 138 return ERR_PTR(-EREMOTE); 139 } 140 141 return intel_bo_to_drm_bo(obj); 142 } 143 144 const struct intel_display_bo_interface i915_display_bo_interface = { 145 .is_tiled = i915_bo_is_tiled, 146 .is_userptr = i915_bo_is_userptr, 147 .is_shmem = i915_bo_is_shmem, 148 .is_protected = i915_bo_is_protected, 149 .key_check = i915_bo_key_check, 150 .fb_mmap = i915_bo_fb_mmap, 151 .read_from_page = i915_bo_read_from_page, 152 .describe = i915_bo_describe, 153 .framebuffer_init = i915_bo_framebuffer_init, 154 .framebuffer_fini = i915_bo_framebuffer_fini, 155 .framebuffer_lookup = i915_bo_framebuffer_lookup, 156 }; 157