diff options
Diffstat (limited to 'drivers/media/video/cx18/cx18-driver.h')
| -rw-r--r-- | drivers/media/video/cx18/cx18-driver.h | 45 |
1 files changed, 31 insertions, 14 deletions
diff --git a/drivers/media/video/cx18/cx18-driver.h b/drivers/media/video/cx18/cx18-driver.h index 1a899e0773d7..bed8bcc65411 100644 --- a/drivers/media/video/cx18/cx18-driver.h +++ b/drivers/media/video/cx18/cx18-driver.h @@ -246,8 +246,8 @@ struct cx18_options { int radio; /* enable/disable radio */ }; -/* per-buffer bit flags */ -#define CX18_F_B_NEED_BUF_SWAP 0 /* this buffer should be byte swapped */ +/* per-mdl bit flags */ +#define CX18_F_M_NEED_SWAP 0 /* mdl buffer data must be endianess swapped */ /* per-stream, s_flags */ #define CX18_F_S_CLAIMED 3 /* this stream is claimed */ @@ -274,15 +274,26 @@ struct cx18_options { struct cx18_buffer { struct list_head list; dma_addr_t dma_handle; - u32 id; - unsigned long b_flags; - unsigned skipped; char *buf; u32 bytesused; u32 readpos; }; +struct cx18_mdl { + struct list_head list; + u32 id; /* index into cx->scb->cpu_mdl[] of 1st cx18_mdl_ent */ + + unsigned int skipped; + unsigned long m_flags; + + struct list_head buf_list; + struct cx18_buffer *curr_buf; /* current buffer in list for reading */ + + u32 bytesused; + u32 readpos; +}; + struct cx18_queue { struct list_head list; atomic_t depth; @@ -346,14 +357,20 @@ struct cx18_stream { PCI_DMA_NONE */ wait_queue_head_t waitq; - /* Buffer Stats */ - u32 buffers; - u32 buf_size; + /* Buffers */ + struct list_head buf_pool; /* buffers not attached to an MDL */ + u32 buffers; /* total buffers owned by this stream */ + u32 buf_size; /* size in bytes of a single buffer */ + + /* MDL sizes - all stream MDLs are the same size */ + u32 bufs_per_mdl; + u32 mdl_size; /* total bytes in all buffers in a mdl */ - /* Buffer Queues */ - struct cx18_queue q_free; /* free buffers */ - struct cx18_queue q_busy; /* busy buffers - in use by firmware */ - struct cx18_queue q_full; /* full buffers - data for user apps */ + /* MDL Queues */ + struct cx18_queue q_free; /* free - in rotation, not committed */ + struct cx18_queue q_busy; /* busy - in use by firmware */ + struct cx18_queue q_full; /* full - data for user apps */ + struct cx18_queue q_idle; /* idle - not in rotation */ struct work_struct out_work_order; @@ -481,10 +498,11 @@ struct vbi_info { u32 inserted_frame; /* - * A dummy driver stream transfer buffer with a copy of the next + * A dummy driver stream transfer mdl & buffer with a copy of the next * sliced_mpeg_data[] buffer for output to userland apps. * Only used in cx18-fileops.c, but its state needs to persist at times. */ + struct cx18_mdl sliced_mpeg_mdl; struct cx18_buffer sliced_mpeg_buf; }; @@ -511,7 +529,6 @@ struct cx18 { u8 is_60hz; u8 nof_inputs; /* number of video inputs */ u8 nof_audio_inputs; /* number of audio inputs */ - u16 buffer_id; /* buffer ID counter */ u32 v4l2_cap; /* V4L2 capabilities of card */ u32 hw_flags; /* Hardware description of the board */ unsigned int free_mdl_idx; |