mga_drv.h

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/* mga_drv.h -- Private header for the Matrox g200/g400 driver -*- linux-c -*-
 * Created: Mon Dec 13 01:50:01 1999 by [e-mail]
 *
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * 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, sublicense,
 * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
 * PRECISION INSIGHT 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: Rickard E. (Rik) Faith <[e-mail]>
 * 	    Jeff Hartmann <[e-mail]>
 *
 */

#ifndef _MGA_DRV_H_
#define _MGA_DRV_H_

#define MGA_BUF_IN_USE         0
#define MGA_BUF_SWAP_PENDING   1
#define MGA_BUF_FORCE_FIRE     2
#define MGA_BUF_NEEDS_OVERFLOW 3

typedef struct {
	long buffer_status; /* long req'd for set_bit() --RR */
   	int num_dwords;
   	int max_dwords;
   	u32 *current_dma_ptr;
   	u32 *head;
   	u32 phys_head;
	unsigned int prim_age;
   	int sec_used;
   	int idx;
} drm_mga_prim_buf_t;

typedef struct _drm_mga_freelist {
   	__volatile__ unsigned int age;
   	drm_buf_t *buf;
   	struct _drm_mga_freelist *next;
   	struct _drm_mga_freelist *prev;
} drm_mga_freelist_t;

#define MGA_IN_DISPATCH   0
#define MGA_IN_FLUSH      1
#define MGA_IN_WAIT       2
#define MGA_IN_GETBUF	  3

typedef struct _drm_mga_private {
   	long dispatch_status;  /* long req'd for set_bit() --RR */
	unsigned int next_prim_age;
	__volatile__ unsigned int last_prim_age;
   	int reserved_map_idx;
   	int buffer_map_idx;
   	drm_mga_sarea_t *sarea_priv;
   	int primary_size;
   	int warp_ucode_size;
   	int chipset;
   	unsigned int frontOffset;
   	unsigned int backOffset;
   	unsigned int depthOffset;
   	unsigned int textureOffset;
   	unsigned int textureSize;
   	int cpp;
   	unsigned int stride;
   	int sgram;
	int use_agp;
   	drm_mga_warp_index_t WarpIndex[MGA_MAX_G400_PIPES];
	unsigned int WarpPipe;
	unsigned int vertexsize;
   	atomic_t pending_bufs;
   	void *status_page;
   	unsigned long real_status_page;
   	u8 *ioremap;
   	drm_mga_prim_buf_t **prim_bufs;
   	drm_mga_prim_buf_t *next_prim;
   	drm_mga_prim_buf_t *last_prim;
   	drm_mga_prim_buf_t *current_prim;
   	int current_prim_idx;
   	drm_mga_freelist_t *head;
   	drm_mga_freelist_t *tail;
   	wait_queue_head_t flush_queue;	/* Processes waiting until flush    */
      	wait_queue_head_t wait_queue;	/* Processes waiting until interrupt */
	wait_queue_head_t buf_queue;    /* Processes waiting for a free buf */
	/* Some validated register values:
	 */
	u32 mAccess;
} drm_mga_private_t;

				/* mga_drv.c */
extern int  mga_version(struct inode *inode, struct file *filp,
			  unsigned int cmd, unsigned long arg);
extern int  mga_open(struct inode *inode, struct file *filp);
extern int  mga_release(struct inode *inode, struct file *filp);
extern int  mga_ioctl(struct inode *inode, struct file *filp,
			unsigned int cmd, unsigned long arg);
extern int  mga_unlock(struct inode *inode, struct file *filp,
			 unsigned int cmd, unsigned long arg);

				/* mga_dma.c */
extern int  mga_dma_schedule(drm_device_t *dev, int locked);
extern int  mga_dma(struct inode *inode, struct file *filp,
		      unsigned int cmd, unsigned long arg);
extern int  mga_irq_install(drm_device_t *dev, int irq);
extern int  mga_irq_uninstall(drm_device_t *dev);
extern int  mga_control(struct inode *inode, struct file *filp,
			  unsigned int cmd, unsigned long arg);
extern int  mga_lock(struct inode *inode, struct file *filp,
		       unsigned int cmd, unsigned long arg);

/* mga_dma_init does init and release */
extern int mga_dma_init(struct inode *inode, struct file *filp,
			unsigned int cmd, unsigned long arg);
extern int mga_dma_cleanup(drm_device_t *dev);
extern int mga_flush_ioctl(struct inode *inode, struct file *filp,
			   unsigned int cmd, unsigned long arg);
extern unsigned int mga_create_sync_tag(drm_device_t *dev);
extern drm_buf_t *mga_freelist_get(drm_device_t *dev);
extern int mga_freelist_put(drm_device_t *dev, drm_buf_t *buf);
extern int mga_advance_primary(drm_device_t *dev);
extern void mga_reclaim_buffers(drm_device_t *dev, pid_t pid);


				/* mga_bufs.c */
extern int  mga_addbufs(struct inode *inode, struct file *filp,
			unsigned int cmd, unsigned long arg);
extern int  mga_infobufs(struct inode *inode, struct file *filp,
			 unsigned int cmd, unsigned long arg);
extern int  mga_markbufs(struct inode *inode, struct file *filp,
			 unsigned int cmd, unsigned long arg);
extern int  mga_freebufs(struct inode *inode, struct file *filp,
			 unsigned int cmd, unsigned long arg);
extern int  mga_mapbufs(struct inode *inode, struct file *filp,
			unsigned int cmd, unsigned long arg);
extern int  mga_addmap(struct inode *inode, struct file *filp,
		       unsigned int cmd, unsigned long arg);
				/* mga_state.c */
extern int  mga_clear_bufs(struct inode *inode, struct file *filp,
			   unsigned int cmd, unsigned long arg);
extern int  mga_swap_bufs(struct inode *inode, struct file *filp,
			  unsigned int cmd, unsigned long arg);
extern int  mga_iload(struct inode *inode, struct file *filp,
		      unsigned int cmd, unsigned long arg);
extern int  mga_vertex(struct inode *inode, struct file *filp,
		      unsigned int cmd, unsigned long arg);
extern int  mga_indices(struct inode *inode, struct file *filp,
			unsigned int cmd, unsigned long arg);
				/* mga_context.c */
extern int  mga_resctx(struct inode *inode, struct file *filp,
		       unsigned int cmd, unsigned long arg);
extern int  mga_addctx(struct inode *inode, struct file *filp,
		       unsigned int cmd, unsigned long arg);
extern int  mga_modctx(struct inode *inode, struct file *filp,
		       unsigned int cmd, unsigned long arg);
extern int  mga_getctx(struct inode *inode, struct file *filp,
		       unsigned int cmd, unsigned long arg);
extern int  mga_switchctx(struct inode *inode, struct file *filp,
			  unsigned int cmd, unsigned long arg);
extern int  mga_newctx(struct inode *inode, struct file *filp,
		       unsigned int cmd, unsigned long arg);
extern int  mga_rmctx(struct inode *inode, struct file *filp,
		      unsigned int cmd, unsigned long arg);

extern int  mga_context_switch(drm_device_t *dev, int old, int new);
extern int  mga_context_switch_complete(drm_device_t *dev, int new);

#define mga_flush_write_combine()	mb()

typedef enum {
	TT_GENERAL,
	TT_BLIT,
	TT_VECTOR,
	TT_VERTEX
} transferType_t;

typedef struct {
   	drm_mga_freelist_t *my_freelist;
	int discard;
	int dispatched;
} drm_mga_buf_priv_t;

#define DWGREG0 	0x1c00
#define DWGREG0_END 	0x1dff
#define DWGREG1		0x2c00
#define DWGREG1_END	0x2dff

#define ISREG0(r)	(r >= DWGREG0 && r <= DWGREG0_END)
#define ADRINDEX0(r)	(u8)((r - DWGREG0) >> 2)
#define ADRINDEX1(r)	(u8)(((r - DWGREG1) >> 2) | 0x80)
#define ADRINDEX(r)	(ISREG0(r) ? ADRINDEX0(r) : ADRINDEX1(r))

#define MGA_VERBOSE 0
#define MGA_NUM_PRIM_BUFS 	8

#define PRIMLOCALS	u8 tempIndex[4]; u32 *dma_ptr; u32 phys_head; \
			int outcount, num_dwords

#define PRIM_OVERFLOW(dev, dev_priv, length) do {			   \
	drm_mga_prim_buf_t *tmp_buf =					   \
 		dev_priv->prim_bufs[dev_priv->current_prim_idx];	   \
	if( test_bit(MGA_BUF_NEEDS_OVERFLOW, &tmp_buf->buffer_status)) {   \
 		mga_advance_primary(dev);				   \
 		mga_dma_schedule(dev, 1);				   \
		tmp_buf = dev_priv->prim_bufs[dev_priv->current_prim_idx]; \
 	} else if( tmp_buf->max_dwords - tmp_buf->num_dwords < length ||   \
 	           tmp_buf->sec_used > MGA_DMA_BUF_NR/2) {		   \
		set_bit(MGA_BUF_FORCE_FIRE, &tmp_buf->buffer_status);	   \
 		mga_advance_primary(dev);				   \
 		mga_dma_schedule(dev, 1);				   \
		tmp_buf = dev_priv->prim_bufs[dev_priv->current_prim_idx]; \
	}								   \
	if(MGA_VERBOSE)							   \
		DRM_DEBUG("PRIMGETPTR in %s\n", __FUNCTION__);		   \
	dma_ptr = tmp_buf->current_dma_ptr;				   \
	num_dwords = tmp_buf->num_dwords;				   \
	phys_head = tmp_buf->phys_head;					   \
	outcount = 0;							   \
} while(0)

#define PRIMGETPTR(dev_priv) do {					\
	drm_mga_prim_buf_t *tmp_buf =					\
		dev_priv->prim_bufs[dev_priv->current_prim_idx];	\
	if(MGA_VERBOSE)							\
		DRM_DEBUG("PRIMGETPTR in %s\n", __FUNCTION__);		\
	dma_ptr = tmp_buf->current_dma_ptr;				\
	num_dwords = tmp_buf->num_dwords;				\
	phys_head = tmp_buf->phys_head;					\
	outcount = 0;							\
} while(0)

#define PRIMPTR(prim_buf) do {					\
	if(MGA_VERBOSE)						\
		DRM_DEBUG("PRIMPTR in %s\n", __FUNCTION__);	\
	dma_ptr = prim_buf->current_dma_ptr;			\
	num_dwords = prim_buf->num_dwords;			\
	phys_head = prim_buf->phys_head;			\
	outcount = 0;						\
} while(0)

#define PRIMFINISH(prim_buf) do {				\
	if (MGA_VERBOSE) {					\
		DRM_DEBUG( "PRIMFINISH in %s\n", __FUNCTION__);	\
                if (outcount & 3)				\
                      DRM_DEBUG(" --- truncation\n");	        \
        }							\
	prim_buf->num_dwords = num_dwords;			\