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_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos); 34 35 static int msm_framebuffer_dirtyfb(struct drm_framebuffer *fb, 36 struct drm_file *file_priv, unsigned int flags, 37 unsigned int color, struct drm_clip_rect *clips, 38 unsigned int num_clips) 39 { 40 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 41 42 /* If this fb is not used on any display requiring pixel data to be 43 * flushed, then skip dirtyfb 44 */ 45 if (refcount_read(&msm_fb->dirtyfb) == 1) 46 return 0; 47 48 return drm_atomic_helper_dirtyfb(fb, file_priv, flags, color, 49 clips, num_clips); 50 } 51 52 static const struct drm_framebuffer_funcs msm_framebuffer_funcs = { 53 .create_handle = drm_gem_fb_create_handle, 54 .destroy = drm_gem_fb_destroy, 55 .dirty = msm_framebuffer_dirtyfb, 56 }; 57 58 #ifdef CONFIG_DEBUG_FS 59 void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 60 { 61 struct msm_gem_stats stats = {}; 62 int i, n = fb->format->num_planes; 63 64 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n", 65 fb->width, fb->height, (char *)&fb->format->format, 66 drm_framebuffer_read_refcount(fb), fb->base.id); 67 68 for (i = 0; i < n; i++) { 69 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 70 i, fb->offsets[i], fb->pitches[i]); 71 msm_gem_describe(fb->obj[i], m, &stats); 72 } 73 } 74 #endif 75 76 /* prepare/pin all the fb's bo's for scanout. 77 */ 78 int msm_framebuffer_prepare(struct drm_framebuffer *fb, bool needs_dirtyfb) 79 { 80 struct msm_drm_private *priv = fb->dev->dev_private; 81 struct drm_gpuvm *vm = priv->kms->vm; 82 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 83 int ret, i, n = fb->format->num_planes; 84 85 if (needs_dirtyfb) 86 refcount_inc(&msm_fb->dirtyfb); 87 88 if (atomic_inc_return(&msm_fb->prepare_count) > 1) 89 return 0; 90 91 for (i = 0; i < n; i++) { 92 msm_gem_vma_get(fb->obj[i]); 93 ret = msm_gem_get_and_pin_iova(fb->obj[i], vm, &msm_fb->iova[i]); 94 drm_dbg_state(fb->dev, "FB[%u]: iova[%d]: %08llx (%d)\n", 95 fb->base.id, i, msm_fb->iova[i], ret); 96 if (ret) 97 return ret; 98 } 99 100 return 0; 101 } 102 103 void msm_framebuffer_cleanup(struct drm_framebuffer *fb, bool needed_dirtyfb) 104 { 105 struct msm_drm_private *priv = fb->dev->dev_private; 106 struct drm_gpuvm *vm = priv->kms->vm; 107 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 108 int i, n = fb->format->num_planes; 109 110 if (needed_dirtyfb) 111 refcount_dec(&msm_fb->dirtyfb); 112 113 if (atomic_dec_return(&msm_fb->prepare_count)) 114 return; 115 116 memset(msm_fb->iova, 0, sizeof(msm_fb->iova)); 117 118 for (i = 0; i < n; i++) { 119 msm_gem_unpin_iova(fb->obj[i], vm); 120 msm_gem_vma_put(fb->obj[i]); 121 } 122 } 123 124 uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, int plane) 125 { 126 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 127 return msm_fb->iova[plane] + fb->offsets[plane]; 128 } 129 130 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane) 131 { 132 return drm_gem_fb_get_obj(fb, plane); 133 } 134 135 const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb) 136 { 137 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb); 138 return msm_fb->format; 139 } 140 141 struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev, 142 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd) 143 { 144 const struct drm_format_info *info = drm_get_format_info(dev, 145 mode_cmd->pixel_format, 146 mode_cmd->modifier[0]); 147 struct drm_gem_object *bos[4] = {0}; 148 struct drm_framebuffer *fb; 149 int ret, i, n = info->num_planes; 150 151 for (i = 0; i < n; i++) { 152 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]); 153 if (!bos[i]) { 154 ret = -ENXIO; 155 goto out_unref; 156 } 157 } 158 159 fb = msm_framebuffer_init(dev, mode_cmd, bos); 160 if (IS_ERR(fb)) { 161 ret = PTR_ERR(fb); 162 goto out_unref; 163 } 164 165 return fb; 166 167 out_unref: 168 for (i = 0; i < n; i++) 169 drm_gem_object_put(bos[i]); 170 return ERR_PTR(ret); 171 } 172 173 static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev, 174 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 175 { 176 const struct drm_format_info *info = drm_get_format_info(dev, 177 mode_cmd->pixel_format, 178 mode_cmd->modifier[0]); 179 struct msm_drm_private *priv = dev->dev_private; 180 struct msm_kms *kms = priv->kms; 181 struct msm_framebuffer *msm_fb = NULL; 182 struct drm_framebuffer *fb; 183 const struct msm_format *format; 184 int ret, i, n; 185 186 drm_dbg_state(dev, "create framebuffer: mode_cmd=%p (%dx%d@%p4cc)\n", 187 mode_cmd, mode_cmd->width, mode_cmd->height, 188 &mode_cmd->pixel_format); 189 190 n = info->num_planes; 191 format = mdp_get_format(kms, mode_cmd->pixel_format, 192 mode_cmd->modifier[0]); 193 if (!format) { 194 DRM_DEV_ERROR(dev->dev, "unsupported pixel format: %p4cc\n", 195 &mode_cmd->pixel_format); 196 ret = -EINVAL; 197 goto fail; 198 } 199 200 msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL); 201 if (!msm_fb) { 202 ret = -ENOMEM; 203 goto fail; 204 } 205 206 fb = &msm_fb->base; 207 208 msm_fb->format = format; 209 210 if (n > ARRAY_SIZE(fb->obj)) { 211 ret = -EINVAL; 212 goto fail; 213 } 214 215 for (i = 0; i < n; i++) { 216 unsigned int width = mode_cmd->width / (i ? info->hsub : 1); 217 unsigned int height = mode_cmd->height / (i ? info->vsub : 1); 218 unsigned int min_size; 219 220 min_size = (height - 1) * mode_cmd->pitches[i] 221 + width * info->cpp[i] 222 + mode_cmd->offsets[i]; 223 224 if (bos[i]->size < min_size) { 225 ret = -EINVAL; 226 goto fail; 227 } 228 229 msm_fb->base.obj[i] = bos[i]; 230 } 231 232 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); 233 234 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs); 235 if (ret) { 236 DRM_DEV_ERROR(dev->dev, "framebuffer init failed: %d\n", ret); 237 goto fail; 238 } 239 240 refcount_set(&msm_fb->dirtyfb, 1); 241 242 drm_dbg_state(dev, "create: FB ID: %d (%p)\n", fb->base.id, fb); 243 244 return fb; 245 246 fail: 247 kfree(msm_fb); 248 249 return ERR_PTR(ret); 250 } 251 252 struct drm_framebuffer * 253 msm_alloc_stolen_fb(struct drm_device *dev, int w, int h, int p, uint32_t format) 254 { 255 struct drm_mode_fb_cmd2 mode_cmd = { 256 .pixel_format = format, 257 .width = w, 258 .height = h, 259 .pitches = { p }, 260 }; 261 struct drm_gem_object *bo; 262 struct drm_framebuffer *fb; 263 int size; 264 265 /* allocate backing bo */ 266 size = mode_cmd.pitches[0] * mode_cmd.height; 267 DBG("allocating %d bytes for fb %d", size, dev->primary->index); 268 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC | MSM_BO_STOLEN); 269 if (IS_ERR(bo)) { 270 dev_warn(dev->dev, "could not allocate stolen bo\n"); 271 /* try regular bo: */ 272 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC); 273 } 274 if (IS_ERR(bo)) { 275 DRM_DEV_ERROR(dev->dev, "failed to allocate buffer object\n"); 276 return ERR_CAST(bo); 277 } 278 279 msm_gem_object_set_name(bo, "stolenfb"); 280 281 fb = msm_framebuffer_init(dev, &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