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