1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2013 Red Hat 4 * Author: Rob Clark <robdclark@gmail.com> 5 */ 6 7 #include <drm/drm_crtc.h> 8 #include <drm/drm_damage_helper.h> 9 #include <drm/drm_file.h> 10 #include <drm/drm_fourcc.h> 11 #include <drm/drm_framebuffer.h> 12 #include <drm/drm_gem_framebuffer_helper.h> 13 #include <drm/drm_probe_helper.h> 14 15 #include "msm_drv.h" 16 #include "msm_kms.h" 17 #include "msm_gem.h" 18 19 struct msm_framebuffer { 20 struct drm_framebuffer base; 21 const struct msm_format *format; 22 23 /* Count of # of attached planes which need dirtyfb: */ 24 refcount_t dirtyfb; 25 26 /* Framebuffer per-plane address, if pinned, else zero: */ 27 uint64_t iova[DRM_FORMAT_MAX_PLANES]; 28 atomic_t prepare_count; 29 }; 30 #define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base) 31 32 static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, 33 const struct drm_format_info *info, 34 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos); 35 36 static int msm_framebuffer_dirtyfb(struct drm_framebuffer *fb, 37 struct drm_file *file_priv, unsigned int flags, 38 unsigned int color, struct drm_clip_rect *clips, 39 unsigned int num_clips) 40 { 41 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 42 43 /* If this fb is not used on any display requiring pixel data to be 44 * flushed, then skip dirtyfb 45 */ 46 if (refcount_read(&msm_fb->dirtyfb) == 1) 47 return 0; 48 49 return drm_atomic_helper_dirtyfb(fb, file_priv, flags, color, 50 clips, num_clips); 51 } 52 53 static const struct drm_framebuffer_funcs msm_framebuffer_funcs = { 54 .create_handle = drm_gem_fb_create_handle, 55 .destroy = drm_gem_fb_destroy, 56 .dirty = msm_framebuffer_dirtyfb, 57 }; 58 59 #ifdef CONFIG_DEBUG_FS 60 void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 61 { 62 struct msm_gem_stats stats = {}; 63 int i, n = fb->format->num_planes; 64 65 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n", 66 fb->width, fb->height, (char *)&fb->format->format, 67 drm_framebuffer_read_refcount(fb), fb->base.id); 68 69 for (i = 0; i < n; i++) { 70 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 71 i, fb->offsets[i], fb->pitches[i]); 72 msm_gem_describe(fb->obj[i], m, &stats); 73 } 74 } 75 #endif 76 77 /* prepare/pin all the fb's bo's for scanout. 78 */ 79 int msm_framebuffer_prepare(struct drm_framebuffer *fb, bool needs_dirtyfb) 80 { 81 struct msm_drm_private *priv = fb->dev->dev_private; 82 struct drm_gpuvm *vm = priv->kms->vm; 83 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 84 int ret, i, n = fb->format->num_planes; 85 86 if (needs_dirtyfb) 87 refcount_inc(&msm_fb->dirtyfb); 88 89 if (atomic_inc_return(&msm_fb->prepare_count) > 1) 90 return 0; 91 92 for (i = 0; i < n; i++) { 93 msm_gem_vma_get(fb->obj[i]); 94 ret = msm_gem_get_and_pin_iova(fb->obj[i], vm, &msm_fb->iova[i]); 95 drm_dbg_state(fb->dev, "FB[%u]: iova[%d]: %08llx (%d)\n", 96 fb->base.id, i, msm_fb->iova[i], ret); 97 if (ret) 98 return ret; 99 } 100 101 return 0; 102 } 103 104 void msm_framebuffer_cleanup(struct drm_framebuffer *fb, bool needed_dirtyfb) 105 { 106 struct msm_drm_private *priv = fb->dev->dev_private; 107 struct drm_gpuvm *vm = priv->kms->vm; 108 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 109 int i, n = fb->format->num_planes; 110 111 if (needed_dirtyfb) 112 refcount_dec(&msm_fb->dirtyfb); 113 114 if (atomic_dec_return(&msm_fb->prepare_count)) 115 return; 116 117 memset(msm_fb->iova, 0, sizeof(msm_fb->iova)); 118 119 for (i = 0; i < n; i++) { 120 msm_gem_unpin_iova(fb->obj[i], vm); 121 msm_gem_vma_put(fb->obj[i]); 122 } 123 } 124 125 uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, int plane) 126 { 127 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 128 return msm_fb->iova[plane] + fb->offsets[plane]; 129 } 130 131 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane) 132 { 133 return drm_gem_fb_get_obj(fb, plane); 134 } 135 136 const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb) 137 { 138 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 139 return msm_fb->format; 140 } 141 142 struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev, 143 struct drm_file *file, const struct drm_format_info *info, 144 const struct drm_mode_fb_cmd2 *mode_cmd) 145 { 146 struct drm_gem_object *bos[4] = {0}; 147 struct drm_framebuffer *fb; 148 int ret, i, n = info->num_planes; 149 150 for (i = 0; i < n; i++) { 151 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]); 152 if (!bos[i]) { 153 ret = -ENXIO; 154 goto out_unref; 155 } 156 } 157 158 fb = msm_framebuffer_init(dev, info, mode_cmd, bos); 159 if (IS_ERR(fb)) { 160 ret = PTR_ERR(fb); 161 goto out_unref; 162 } 163 164 return fb; 165 166 out_unref: 167 for (i = 0; i < n; i++) 168 drm_gem_object_put(bos[i]); 169 return ERR_PTR(ret); 170 } 171 172 static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, 173 const struct drm_format_info *info, 174 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 175 { 176 struct msm_drm_private *priv = dev->dev_private; 177 struct msm_kms *kms = priv->kms; 178 struct msm_framebuffer *msm_fb = NULL; 179 struct drm_framebuffer *fb; 180 const struct msm_format *format; 181 int ret, i, n; 182 183 drm_dbg_state(dev, "create framebuffer: mode_cmd=%p (%dx%d@%p4cc)\n", 184 mode_cmd, mode_cmd->width, mode_cmd->height, 185 &mode_cmd->pixel_format); 186 187 n = info->num_planes; 188 format = mdp_get_format(kms, mode_cmd->pixel_format, 189 mode_cmd->modifier[0]); 190 if (!format) { 191 DRM_DEV_ERROR(dev->dev, "unsupported pixel format: %p4cc\n", 192 &mode_cmd->pixel_format); 193 ret = -EINVAL; 194 goto fail; 195 } 196 197 msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL); 198 if (!msm_fb) { 199 ret = -ENOMEM; 200 goto fail; 201 } 202 203 fb = &msm_fb->base; 204 205 msm_fb->format = format; 206 207 if (n > ARRAY_SIZE(fb->obj)) { 208 ret = -EINVAL; 209 goto fail; 210 } 211 212 for (i = 0; i < n; i++) { 213 unsigned int width = mode_cmd->width / (i ? info->hsub : 1); 214 unsigned int height = mode_cmd->height / (i ? info->vsub : 1); 215 unsigned int min_size; 216 217 min_size = (height - 1) * mode_cmd->pitches[i] 218 + width * info->cpp[i] 219 + mode_cmd->offsets[i]; 220 221 if (bos[i]->size < min_size) { 222 ret = -EINVAL; 223 goto fail; 224 } 225 226 msm_fb->base.obj[i] = bos[i]; 227 } 228 229 drm_helper_mode_fill_fb_struct(dev, fb, info, mode_cmd); 230 231 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs); 232 if (ret) { 233 DRM_DEV_ERROR(dev->dev, "framebuffer init failed: %d\n", ret); 234 goto fail; 235 } 236 237 refcount_set(&msm_fb->dirtyfb, 1); 238 239 drm_dbg_state(dev, "create: FB ID: %d (%p)\n", fb->base.id, fb); 240 241 return fb; 242 243 fail: 244 kfree(msm_fb); 245 246 return ERR_PTR(ret); 247 } 248 249 struct drm_framebuffer * 250 msm_alloc_stolen_fb(struct drm_device *dev, int w, int h, int p, uint32_t format) 251 { 252 struct drm_mode_fb_cmd2 mode_cmd = { 253 .pixel_format = format, 254 .width = w, 255 .height = h, 256 .pitches = { p }, 257 }; 258 struct drm_gem_object *bo; 259 struct drm_framebuffer *fb; 260 int size; 261 262 /* allocate backing bo */ 263 size = mode_cmd.pitches[0] * mode_cmd.height; 264 DBG("allocating %d bytes for fb %d", size, dev->primary->index); 265 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC | MSM_BO_STOLEN); 266 if (IS_ERR(bo)) { 267 dev_warn(dev->dev, "could not allocate stolen bo\n"); 268 /* try regular bo: */ 269 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC); 270 } 271 if (IS_ERR(bo)) { 272 DRM_DEV_ERROR(dev->dev, "failed to allocate buffer object\n"); 273 return ERR_CAST(bo); 274 } 275 276 msm_gem_object_set_name(bo, "stolenfb"); 277 278 fb = msm_framebuffer_init(dev, 279 drm_get_format_info(dev, mode_cmd.pixel_format, 280 mode_cmd.modifier[0]), 281 &mode_cmd, &bo); 282 if (IS_ERR(fb)) { 283 DRM_DEV_ERROR(dev->dev, "failed to allocate fb\n"); 284 /* note: if fb creation failed, we can't rely on fb destroy 285 * to unref the bo: 286 */ 287 drm_gem_object_put(bo); 288 return ERR_CAST(fb); 289 } 290 291 return fb; 292 } 293