drivers/media/v4l2-core/videobuf2-internal.h

   1 #ifndef _MEDIA_VIDEOBUF2_INTERNAL_H
   2 #define _MEDIA_VIDEOBUF2_INTERNAL_H
   3
   4 #include <linux/err.h>
   5 #include <linux/kernel.h>
   6 #include <linux/module.h>
   7 #include <media/videobuf2-core.h>
   8
   9 extern int vb2_debug;
  10
  11 #define dprintk(level, fmt, arg...)                                           \
  12         do {                                                                  \
  13                 if (vb2_debug >= level)                                       \
  14                         pr_info("vb2: %s: " fmt, __func__, ## arg); \
  15         } while (0)
  16
  17 #ifdef CONFIG_VIDEO_ADV_DEBUG
  18
  19 /*
  20  * If advanced debugging is on, then count how often each op is called
  21  * successfully, which can either be per-buffer or per-queue.
  22  *
  23  * This makes it easy to check that the 'init' and 'cleanup'
  24  * (and variations thereof) stay balanced.
  25  */
  26
  27 #define log_memop(vb, op)                                               \
  28         dprintk(2, "call_memop(%p, %d, %s)%s\n",                        \
  29                 (vb)->vb2_queue, (vb)->index, #op,                      \
  30                 (vb)->vb2_queue->mem_ops->op ? "" : " (nop)")
  31
  32 #define call_memop(vb, op, args...)                                     \
  33 ({                                                                      \
  34         struct vb2_queue *_q = (vb)->vb2_queue;                         \
  35         int err;                                                        \
  36                                                                         \
  37         log_memop(vb, op);                                              \
  38         err = _q->mem_ops->op ? _q->mem_ops->op(args) : 0;              \
  39         if (!err)                                                       \
  40                 (vb)->cnt_mem_ ## op++;                                 \
  41         err;                                                            \
  42 })
  43
  44 #define call_ptr_memop(vb, op, args...)                                 \
  45 ({                                                                      \
  46         struct vb2_queue *_q = (vb)->vb2_queue;                         \
  47         void *ptr;                                                      \
  48                                                                         \
  49         log_memop(vb, op);                                              \
  50         ptr = _q->mem_ops->op ? _q->mem_ops->op(args) : NULL;           \
  51         if (!IS_ERR_OR_NULL(ptr))                                       \
  52                 (vb)->cnt_mem_ ## op++;                                 \
  53         ptr;                                                            \
  54 })
  55
  56 #define call_void_memop(vb, op, args...)                                \
  57 ({                                                                      \
  58         struct vb2_queue *_q = (vb)->vb2_queue;                         \
  59                                                                         \
  60         log_memop(vb, op);                                              \
  61         if (_q->mem_ops->op)                                            \
  62                 _q->mem_ops->op(args);                                  \
  63         (vb)->cnt_mem_ ## op++;                                         \
  64 })
  65
  66 #define log_qop(q, op)                                                  \
  67         dprintk(2, "call_qop(%p, %s)%s\n", q, #op,                      \
  68                 (q)->ops->op ? "" : " (nop)")
  69
  70 #define call_qop(q, op, args...)                                        \
  71 ({                                                                      \
  72         int err;                                                        \
  73                                                                         \
  74         log_qop(q, op);                                                 \
  75         err = (q)->ops->op ? (q)->ops->op(args) : 0;                    \
  76         if (!err)                                                       \
  77                 (q)->cnt_ ## op++;                                      \
  78         err;                                                            \
  79 })
  80
  81 #define call_void_qop(q, op, args...)                                   \
  82 ({                                                                      \
  83         log_qop(q, op);                                                 \
  84         if ((q)->ops->op)                                               \
  85                 (q)->ops->op(args);                                     \
  86         (q)->cnt_ ## op++;                                              \
  87 })
  88
  89 #define log_vb_qop(vb, op, args...)                                     \
  90         dprintk(2, "call_vb_qop(%p, %d, %s)%s\n",                       \
  91                 (vb)->vb2_queue, (vb)->index, #op,                      \
  92                 (vb)->vb2_queue->ops->op ? "" : " (nop)")
  93
  94 #define call_vb_qop(vb, op, args...)                                    \
  95 ({                                                                      \
  96         int err;                                                        \
  97                                                                         \
  98         log_vb_qop(vb, op);                                             \
  99         err = (vb)->vb2_queue->ops->op ?                                \
 100                 (vb)->vb2_queue->ops->op(args) : 0;                     \
 101         if (!err)                                                       \
 102                 (vb)->cnt_ ## op++;                                     \
 103         err;                                                            \
 104 })
 105
 106 #define call_void_vb_qop(vb, op, args...)                               \
 107 ({                                                                      \
 108         log_vb_qop(vb, op);                                             \
 109         if ((vb)->vb2_queue->ops->op)                                   \
 110                 (vb)->vb2_queue->ops->op(args);                         \
 111         (vb)->cnt_ ## op++;                                             \
 112 })
 113
 114 #else
 115
 116 #define call_memop(vb, op, args...)                                     \
 117         ((vb)->vb2_queue->mem_ops->op ?                                 \
 118                 (vb)->vb2_queue->mem_ops->op(args) : 0)
 119
 120 #define call_ptr_memop(vb, op, args...)                                 \
 121         ((vb)->vb2_queue->mem_ops->op ?                                 \
 122                 (vb)->vb2_queue->mem_ops->op(args) : NULL)
 123
 124 #define call_void_memop(vb, op, args...)                                \
 125         do {                                                            \
 126                 if ((vb)->vb2_queue->mem_ops->op)                       \
 127                         (vb)->vb2_queue->mem_ops->op(args);             \
 128         } while (0)
 129
 130 #define call_qop(q, op, args...)                                        \
 131         ((q)->ops->op ? (q)->ops->op(args) : 0)
 132
 133 #define call_void_qop(q, op, args...)                                   \
 134         do {                                                            \
 135                 if ((q)->ops->op)                                       \
 136                         (q)->ops->op(args);                             \
 137         } while (0)
 138
 139 #define call_vb_qop(vb, op, args...)                                    \
 140         ((vb)->vb2_queue->ops->op ? (vb)->vb2_queue->ops->op(args) : 0)
 141
 142 #define call_void_vb_qop(vb, op, args...)                               \
 143         do {                                                            \
 144                 if ((vb)->vb2_queue->ops->op)                           \
 145                         (vb)->vb2_queue->ops->op(args);                 \
 146         } while (0)
 147
 148 #endif
 149
 150 #define call_bufop(q, op, args...)                                      \
 151 ({                                                                      \
 152         int ret = 0;                                                    \
 153         if (q && q->buf_ops && q->buf_ops->op)                          \
 154                 ret = q->buf_ops->op(args);                             \
 155         ret;                                                            \
 156 })
 157
 158 bool vb2_buffer_in_use(struct vb2_queue *q, struct vb2_buffer *vb);
 159 int vb2_verify_memory_type(struct vb2_queue *q,
 160                 enum vb2_memory memory, unsigned int type);
 161 #endif /* _MEDIA_VIDEOBUF2_INTERNAL_H */