drivers/gpu/drm/msm/msm_gem.h

   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 #ifndef __MSM_GEM_H__
   8 #define __MSM_GEM_H__
   9
  10 #include <linux/kref.h>
  11 #include <linux/dma-resv.h>
  12 #include "msm_drv.h"
  13
  14 /* Additional internal-use only BO flags: */
  15 #define MSM_BO_STOLEN        0x10000000    /* try to use stolen/splash memory */
  16 #define MSM_BO_MAP_PRIV      0x20000000    /* use IOMMU_PRIV when mapping */
  17
  18 struct msm_gem_address_space {
  19         const char *name;
  20         /* NOTE: mm managed at the page level, size is in # of pages
  21          * and position mm_node->start is in # of pages:
  22          */
  23         struct drm_mm mm;
  24         spinlock_t lock; /* Protects drm_mm node allocation/removal */
  25         struct msm_mmu *mmu;
  26         struct kref kref;
  27
  28         /* For address spaces associated with a specific process, this
  29          * will be non-NULL:
  30          */
  31         struct pid *pid;
  32 };
  33
  34 struct msm_gem_vma {
  35         struct drm_mm_node node;
  36         uint64_t iova;
  37         struct msm_gem_address_space *aspace;
  38         struct list_head list;    /* node in msm_gem_object::vmas */
  39         bool mapped;
  40         int inuse;
  41 };
  42
  43 struct msm_gem_object {
  44         struct drm_gem_object base;
  45
  46         uint32_t flags;
  47
  48         /**
  49          * Advice: are the backing pages purgeable?
  50          */
  51         uint8_t madv;
  52
  53         /**
  54          * count of active vmap'ing
  55          */
  56         uint8_t vmap_count;
  57
  58         /* And object is either:
  59          *  inactive - on priv->inactive_list
  60          *  active   - on one one of the gpu's active_list..  well, at
  61          *     least for now we don't have (I don't think) hw sync between
  62          *     2d and 3d one devices which have both, meaning we need to
  63          *     block on submit if a bo is already on other ring
  64          *
  65          */
  66         struct list_head mm_list;
  67
  68         /* Transiently in the process of submit ioctl, objects associated
  69          * with the submit are on submit->bo_list.. this only lasts for
  70          * the duration of the ioctl, so one bo can never be on multiple
  71          * submit lists.
  72          */
  73         struct list_head submit_entry;
  74
  75         struct page **pages;
  76         struct sg_table *sgt;
  77         void *vaddr;
  78
  79         struct list_head vmas;    /* list of msm_gem_vma */
  80
  81         struct llist_node freed;
  82
  83         /* For physically contiguous buffers.  Used when we don't have
  84          * an IOMMU.  Also used for stolen/splashscreen buffer.
  85          */
  86         struct drm_mm_node *vram_node;
  87
  88         char name[32]; /* Identifier to print for the debugfs files */
  89
  90         int active_count;
  91 };
  92 #define to_msm_bo(x) container_of(x, struct msm_gem_object, base)
  93
  94 int msm_gem_mmap_obj(struct drm_gem_object *obj,
  95                         struct vm_area_struct *vma);
  96 int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
  97 uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj);
  98 int msm_gem_get_iova(struct drm_gem_object *obj,
  99                 struct msm_gem_address_space *aspace, uint64_t *iova);
 100 int msm_gem_get_and_pin_iova_range(struct drm_gem_object *obj,
 101                 struct msm_gem_address_space *aspace, uint64_t *iova,
 102                 u64 range_start, u64 range_end);
 103 int msm_gem_get_and_pin_iova_locked(struct drm_gem_object *obj,
 104                 struct msm_gem_address_space *aspace, uint64_t *iova);
 105 int msm_gem_get_and_pin_iova(struct drm_gem_object *obj,
 106                 struct msm_gem_address_space *aspace, uint64_t *iova);
 107 uint64_t msm_gem_iova(struct drm_gem_object *obj,
 108                 struct msm_gem_address_space *aspace);
 109 void msm_gem_unpin_iova_locked(struct drm_gem_object *obj,
 110                 struct msm_gem_address_space *aspace);
 111 void msm_gem_unpin_iova(struct drm_gem_object *obj,
 112                 struct msm_gem_address_space *aspace);
 113 struct page **msm_gem_get_pages(struct drm_gem_object *obj);
 114 void msm_gem_put_pages(struct drm_gem_object *obj);
 115 int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
 116                 struct drm_mode_create_dumb *args);
 117 int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
 118                 uint32_t handle, uint64_t *offset);
 119 void *msm_gem_get_vaddr_locked(struct drm_gem_object *obj);
 120 void *msm_gem_get_vaddr(struct drm_gem_object *obj);
 121 void *msm_gem_get_vaddr_active(struct drm_gem_object *obj);
 122 void msm_gem_put_vaddr_locked(struct drm_gem_object *obj);
 123 void msm_gem_put_vaddr(struct drm_gem_object *obj);
 124 int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv);
 125 int msm_gem_sync_object(struct drm_gem_object *obj,
 126                 struct msm_fence_context *fctx, bool exclusive);
 127 void msm_gem_active_get(struct drm_gem_object *obj, struct msm_gpu *gpu);
 128 void msm_gem_active_put(struct drm_gem_object *obj);
 129 int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout);
 130 int msm_gem_cpu_fini(struct drm_gem_object *obj);
 131 void msm_gem_free_object(struct drm_gem_object *obj);
 132 int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file,
 133                 uint32_t size, uint32_t flags, uint32_t *handle, char *name);
 134 struct drm_gem_object *msm_gem_new(struct drm_device *dev,
 135                 uint32_t size, uint32_t flags);
 136 struct drm_gem_object *msm_gem_new_locked(struct drm_device *dev,
 137                 uint32_t size, uint32_t flags);
 138 void *msm_gem_kernel_new(struct drm_device *dev, uint32_t size,
 139                 uint32_t flags, struct msm_gem_address_space *aspace,
 140                 struct drm_gem_object **bo, uint64_t *iova);
 141 void *msm_gem_kernel_new_locked(struct drm_device *dev, uint32_t size,
 142                 uint32_t flags, struct msm_gem_address_space *aspace,
 143                 struct drm_gem_object **bo, uint64_t *iova);
 144 void msm_gem_kernel_put(struct drm_gem_object *bo,
 145                 struct msm_gem_address_space *aspace, bool locked);
 146 struct drm_gem_object *msm_gem_import(struct drm_device *dev,
 147                 struct dma_buf *dmabuf, struct sg_table *sgt);
 148 __printf(2, 3)
 149 void msm_gem_object_set_name(struct drm_gem_object *bo, const char *fmt, ...);
 150 #ifdef CONFIG_DEBUG_FS
 151 void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m);
 152 void msm_gem_describe_objects(struct list_head *list, struct seq_file *m);
 153 #endif
 154
 155 static inline void
 156 msm_gem_lock(struct drm_gem_object *obj)
 157 {
 158         dma_resv_lock(obj->resv, NULL);
 159 }
 160
 161 static inline bool __must_check
 162 msm_gem_trylock(struct drm_gem_object *obj)
 163 {
 164         return dma_resv_trylock(obj->resv);
 165 }
 166
 167 static inline int
 168 msm_gem_lock_interruptible(struct drm_gem_object *obj)
 169 {
 170         return dma_resv_lock_interruptible(obj->resv, NULL);
 171 }
 172
 173 static inline void
 174 msm_gem_unlock(struct drm_gem_object *obj)
 175 {
 176         dma_resv_unlock(obj->resv);
 177 }
 178
 179 static inline bool
 180 msm_gem_is_locked(struct drm_gem_object *obj)
 181 {
 182         return dma_resv_is_locked(obj->resv);
 183 }
 184
 185 static inline bool is_active(struct msm_gem_object *msm_obj)
 186 {
 187         WARN_ON(!msm_gem_is_locked(&msm_obj->base));
 188         return msm_obj->active_count;
 189 }
 190
 191 static inline bool is_purgeable(struct msm_gem_object *msm_obj)
 192 {
 193         return (msm_obj->madv == MSM_MADV_DONTNEED) && msm_obj->sgt &&
 194                         !msm_obj->base.dma_buf && !msm_obj->base.import_attach;
 195 }
 196
 197 static inline bool is_vunmapable(struct msm_gem_object *msm_obj)
 198 {
 199         WARN_ON(!msm_gem_is_locked(&msm_obj->base));
 200         return (msm_obj->vmap_count == 0) && msm_obj->vaddr;
 201 }
 202
 203 void msm_gem_purge(struct drm_gem_object *obj);
 204 void msm_gem_vunmap(struct drm_gem_object *obj);
 205
 206 /* Created per submit-ioctl, to track bo's and cmdstream bufs, etc,
 207  * associated with the cmdstream submission for synchronization (and
 208  * make it easier to unwind when things go wrong, etc).  This only
 209  * lasts for the duration of the submit-ioctl.
 210  */
 211 struct msm_gem_submit {
 212         struct kref ref;
 213         struct drm_device *dev;
 214         struct msm_gpu *gpu;
 215         struct msm_gem_address_space *aspace;
 216         struct list_head node;   /* node in ring submit list */
 217         struct list_head bo_list;
 218         struct ww_acquire_ctx ticket;
 219         uint32_t seqno;         /* Sequence number of the submit on the ring */
 220         struct dma_fence *fence;
 221         struct msm_gpu_submitqueue *queue;
 222         struct pid *pid;    /* submitting process */
 223         bool valid;         /* true if no cmdstream patching needed */
 224         bool in_rb;         /* "sudo" mode, copy cmds into RB */
 225         struct msm_ringbuffer *ring;
 226         struct msm_file_private *ctx;
 227         unsigned int nr_cmds;
 228         unsigned int nr_bos;
 229         u32 ident;         /* A "identifier" for the submit for logging */
 230         struct {
 231                 uint32_t type;
 232                 uint32_t size;  /* in dwords */
 233                 uint64_t iova;
 234                 uint32_t offset;/* in dwords */
 235                 uint32_t idx;   /* cmdstream buffer idx in bos[] */
 236                 uint32_t nr_relocs;
 237                 struct drm_msm_gem_submit_reloc *relocs;
 238         } *cmd;  /* array of size nr_cmds */
 239         struct {
 240                 uint32_t flags;
 241                 union {
 242                         struct msm_gem_object *obj;
 243                         uint32_t handle;
 244                 };
 245                 uint64_t iova;
 246         } bos[];
 247 };
 248
 249 void __msm_gem_submit_destroy(struct kref *kref);
 250
 251 static inline void msm_gem_submit_get(struct msm_gem_submit *submit)
 252 {
 253         kref_get(&submit->ref);
 254 }
 255
 256 static inline void msm_gem_submit_put(struct msm_gem_submit *submit)
 257 {
 258         kref_put(&submit->ref, __msm_gem_submit_destroy);
 259 }
 260
 261 /* helper to determine of a buffer in submit should be dumped, used for both
 262  * devcoredump and debugfs cmdstream dumping:
 263  */
 264 static inline bool
 265 should_dump(struct msm_gem_submit *submit, int idx)
 266 {
 267         extern bool rd_full;
 268         return rd_full || (submit->bos[idx].flags & MSM_SUBMIT_BO_DUMP);
 269 }
 270
 271 #endif /* __MSM_GEM_H__ */