Release 4.7 drivers/gpu/drm/via/via_dmablit.h
/* via_dmablit.h -- PCI DMA BitBlt support for the VIA Unichrome/Pro
*
* Copyright 2005 Thomas Hellstrom.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sub license,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Authors:
* Thomas Hellstrom.
* Register info from Digeo Inc.
*/
#ifndef _VIA_DMABLIT_H
#define _VIA_DMABLIT_H
#include <linux/dma-mapping.h>
#define VIA_NUM_BLIT_ENGINES 2
#define VIA_NUM_BLIT_SLOTS 8
struct _drm_via_descriptor;
typedef struct _drm_via_sg_info {
struct page **pages;
unsigned long num_pages;
struct _drm_via_descriptor **desc_pages;
int num_desc_pages;
int num_desc;
enum dma_data_direction direction;
unsigned char *bounce_buffer;
dma_addr_t chain_start;
uint32_t free_on_sequence;
unsigned int descriptors_per_page;
int aborted;
enum {
dr_via_device_mapped,
dr_via_desc_pages_alloc,
dr_via_pages_locked,
dr_via_pages_alloc,
dr_via_sg_init
}
state;
}
drm_via_sg_info_t;
typedef struct _drm_via_blitq {
struct drm_device *dev;
uint32_t cur_blit_handle;
uint32_t done_blit_handle;
unsigned serviced;
unsigned head;
unsigned cur;
unsigned num_free;
unsigned num_outstanding;
unsigned long end;
int aborting;
int is_active;
drm_via_sg_info_t *blits[VIA_NUM_BLIT_SLOTS];
spinlock_t blit_lock;
wait_queue_head_t blit_queue[VIA_NUM_BLIT_SLOTS];
wait_queue_head_t busy_queue;
struct work_struct wq;
struct timer_list poll_timer;
}
drm_via_blitq_t;
/*
* PCI DMA Registers
* Channels 2 & 3 don't seem to be implemented in hardware.
*/
#define VIA_PCI_DMA_MAR0 0xE40
/* Memory Address Register of Channel 0 */
#define VIA_PCI_DMA_DAR0 0xE44
/* Device Address Register of Channel 0 */
#define VIA_PCI_DMA_BCR0 0xE48
/* Byte Count Register of Channel 0 */
#define VIA_PCI_DMA_DPR0 0xE4C
/* Descriptor Pointer Register of Channel 0 */
#define VIA_PCI_DMA_MAR1 0xE50
/* Memory Address Register of Channel 1 */
#define VIA_PCI_DMA_DAR1 0xE54
/* Device Address Register of Channel 1 */
#define VIA_PCI_DMA_BCR1 0xE58
/* Byte Count Register of Channel 1 */
#define VIA_PCI_DMA_DPR1 0xE5C
/* Descriptor Pointer Register of Channel 1 */
#define VIA_PCI_DMA_MAR2 0xE60
/* Memory Address Register of Channel 2 */
#define VIA_PCI_DMA_DAR2 0xE64
/* Device Address Register of Channel 2 */
#define VIA_PCI_DMA_BCR2 0xE68
/* Byte Count Register of Channel 2 */
#define VIA_PCI_DMA_DPR2 0xE6C
/* Descriptor Pointer Register of Channel 2 */
#define VIA_PCI_DMA_MAR3 0xE70
/* Memory Address Register of Channel 3 */
#define VIA_PCI_DMA_DAR3 0xE74
/* Device Address Register of Channel 3 */
#define VIA_PCI_DMA_BCR3 0xE78
/* Byte Count Register of Channel 3 */
#define VIA_PCI_DMA_DPR3 0xE7C
/* Descriptor Pointer Register of Channel 3 */
#define VIA_PCI_DMA_MR0 0xE80
/* Mode Register of Channel 0 */
#define VIA_PCI_DMA_MR1 0xE84
/* Mode Register of Channel 1 */
#define VIA_PCI_DMA_MR2 0xE88
/* Mode Register of Channel 2 */
#define VIA_PCI_DMA_MR3 0xE8C
/* Mode Register of Channel 3 */
#define VIA_PCI_DMA_CSR0 0xE90
/* Command/Status Register of Channel 0 */
#define VIA_PCI_DMA_CSR1 0xE94
/* Command/Status Register of Channel 1 */
#define VIA_PCI_DMA_CSR2 0xE98
/* Command/Status Register of Channel 2 */
#define VIA_PCI_DMA_CSR3 0xE9C
/* Command/Status Register of Channel 3 */
#define VIA_PCI_DMA_PTR 0xEA0
/* Priority Type Register */
/* Define for DMA engine */
/* DPR */
#define VIA_DMA_DPR_EC (1<<1)
/* end of chain */
#define VIA_DMA_DPR_DDIE (1<<2)
/* descriptor done interrupt enable */
#define VIA_DMA_DPR_DT (1<<3)
/* direction of transfer (RO) */
/* MR */
#define VIA_DMA_MR_CM (1<<0)
/* chaining mode */
#define VIA_DMA_MR_TDIE (1<<1)
/* transfer done interrupt enable */
#define VIA_DMA_MR_HENDMACMD (1<<7)
/* ? */
/* CSR */
#define VIA_DMA_CSR_DE (1<<0)
/* DMA enable */
#define VIA_DMA_CSR_TS (1<<1)
/* transfer start */
#define VIA_DMA_CSR_TA (1<<2)
/* transfer abort */
#define VIA_DMA_CSR_TD (1<<3)
/* transfer done */
#define VIA_DMA_CSR_DD (1<<4)
/* descriptor done */
#define VIA_DMA_DPR_EC (1<<1)
/* end of chain */
#endif
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