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AgeCommit message (Expand)Author
2007-04-01nouveau: fix usage of PGRAPH_CTX_CONTROL on nv20+Matthieu Castet
2007-04-01nouveau : nv10 ctx switch fixMatthieu Castet
2007-04-01nouveau : set the correct PGRAPH_CTX_CONTROL registerMatthieu Castet
2007-03-30Merge branch 'crestline-qa', adding support for the 965GM chipset.Eric Anholt
2007-03-29nouveau: fix nv04 context switches.Stephane Marchesin
2007-03-27drm/i915: set the bo up at firstopen time not after DMA initDave Airlie
2007-03-27Merge git://proxy01.pd.intel.com:9419/git/mesa/drm into crestlineNian Wu
2007-03-26nouveau: move card initialisation into the drmBen Skeggs
2007-03-23Merge git://proxy01.pd.intel.com:9419/git/mesa/drm into crestlineNian Wu
2007-03-23nouveau: rework nouveau_fifo_alloc() so the drm can create internal FIFOsBen Skeggs
2007-03-23nouveau: remove unused cruftBen Skeggs
2007-03-21Merge git://proxy01.pd.intel.com:9419/git/mesa/drm into crestlineNian Wu
2007-03-21nouveau: support multiple channels per client (breaks drm interface)Ben Skeggs
2007-03-19Merge git://proxy01.pd.intel.com:9419/git/mesa/drm into crestlineNian Wu
2007-03-19more whitespace issuesDave Airlie
2007-03-19whitespace cleanup pending a kernel mergeDave Airlie
2007-03-14Merge git://proxy01.pd.intel.com:9419/git/mesa/drm into crestlineNian Wu
2007-03-13r300: Renamed the CACHE_CTLSTAT values to include UNKNOWN in the name; notOliver McFadden
2007-03-13Merge git://proxy01.pd.intel.com:9419/git/mesa/drm into crestlineNian Wu
2007-03-13Add defines for the values written to R300_RB3D_ZCACHE_CTLSTAT.Oliver McFadden
2007-03-13nouveau: make sure cmdbuf object gets destroyedBen Skeggs
2007-03-13nouveau: associate all created objects with a channel + cleanupsBen Skeggs
2007-03-13nouveau: s/fifo/channel/Ben Skeggs
2007-03-13Corrected values written to R300_RB3D_DSTCACHE_CTLSTAT to eitherOliver McFadden
2007-03-13Guess another unknown register used for R300 pacification.Oliver McFadden
2007-03-12Merge git://proxy01.pd.intel.com:9419/git/mesa/drm into crestlineNian Wu
2007-03-11nouveau: PUT,GET, not 2xPUTPatrice Mandin
2007-03-07Merge git://proxy01.pd.intel.com:9419/git/mesa/drm into crestlineNian Wu
2007-03-07Add via CX700.Thomas Hellstrom
2007-03-05Merge git://proxy01.pd.intel.com:9419/git/mesa/drm into crestlineNian Wu
2007-03-04radeon: make PCI GART aperture size variable, but making table size variableDave Airlie
2007-03-04ati: make pcigart code able to handle variable size PCI GART apertureDave Airlie
2007-03-01Merge git://proxy01.pd.intel.com:9419/git/mesa/drm into crestlineNian Wu
2007-02-28nouveau: intrusive drm interface changesBen Skeggs
2007-02-25Merge git://proxy01.pd.intel.com:9419/git/mesa/drm into crestlineNian Wu
2007-02-25drm: remove unnecessary NULL checks, and fix some indents..Jakob Bornecrantz
2007-02-16Simple fence object sample driver for via, based on idling the GPU.Thomas Hellstrom
2007-02-15Initial support for fence object classes.Thomas Hellstrom
2007-02-14Merge branch 'ttm-vram-0-1-branch'Thomas Hellstrom
2007-02-14Remove an intel-specific hack and replace it with a fence driver callback.Thomas Hellstrom
2007-02-14nouveau: fix the build on big endian (thanks CyberFoxx)Stephane Marchesin
2007-02-14nouveau: fix memory initialization with multiple cards.B. Rathmann
2007-02-13Bugzilla Bug #9457Thomas Hellstrom
2007-02-13i915: Add 965GM pci id updateWang Zhenyu
2007-02-12Update flags and comments.Thomas Hellstrom
2007-02-11Sync r300_reg.h from mesa driver. #10210Aapo Tahkola
2007-03-10Merge branch 'i915-pageflip'Michel Dänzer
2007-03-10i915: Only wait for pending flips before asynchronous flips again.Michel Dänzer
2007-03-09i915: Do not wait for pending flips on both pipes at the same time.Michel Dänzer
2007-03-07nouveau: remove a hack that's not needed since the last interface change.Ben Skeggs
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/* via_dma.c -- DMA support for the VIA Unichrome/Pro
 * 
 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 *
 * Copyright 2004 Digeo, Inc., Palo Alto, CA, U.S.A.
 * All Rights Reserved.
 * 
 * Copyright 2004 The Unichrome project.
 * 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: 
 *    Tungsten Graphics, 
 *    Erdi Chen, 
 *    Thomas Hellstrom.
 */

#include "drmP.h"
#include "drm.h"
#include "via_drm.h"
#include "via_drv.h"
#include "via_3d_reg.h"

#define CMDBUF_ALIGNMENT_SIZE   (0x100)
#define CMDBUF_ALIGNMENT_MASK   (0x0ff)

/* defines for VIA 3D registers */
#define VIA_REG_STATUS	  0x400
#define VIA_REG_TRANSET	 0x43C
#define VIA_REG_TRANSPACE       0x440

/* VIA_REG_STATUS(0x400): Engine Status */
#define VIA_CMD_RGTR_BUSY       0x00000080	/* Command Regulator is busy */
#define VIA_2D_ENG_BUSY	 0x00000001	/* 2D Engine is busy */
#define VIA_3D_ENG_BUSY	 0x00000002	/* 3D Engine is busy */
#define VIA_VR_QUEUE_BUSY       0x00020000	/* Virtual Queue is busy */

#define SetReg2DAGP(nReg, nData) {				\
	*((uint32_t *)(vb)) = ((nReg) >> 2) | HALCYON_HEADER1;	\
	*((uint32_t *)(vb) + 1) = (nData);			\
	vb = ((uint32_t *)vb) + 2;				\
	dev_priv->dma_low +=8;					\
}

#define via_flush_write_combine() DRM_MEMORYBARRIER() 

#define VIA_OUT_RING_QW(w1,w2)			\
	*vb++ = (w1);				\
	*vb++ = (w2);				\
	dev_priv->dma_low += 8; 

static void via_cmdbuf_start(drm_via_private_t * dev_priv);
static void via_cmdbuf_pause(drm_via_private_t * dev_priv);
static void via_cmdbuf_reset(drm_via_private_t * dev_priv);
static void via_cmdbuf_rewind(drm_via_private_t * dev_priv);
static int via_wait_idle(drm_via_private_t * dev_priv);
static void via_pad_cache(drm_via_private_t *dev_priv, int qwords);


/*
 * Free space in command buffer.
 */

static uint32_t via_cmdbuf_space(drm_via_private_t *dev_priv)
{
	uint32_t agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr;
	uint32_t hw_addr = *(dev_priv->hw_addr_ptr) - agp_base;
	
	return ((hw_addr <= dev_priv->dma_low) ? 
		(dev_priv->dma_high + hw_addr - dev_priv->dma_low) : 
		(hw_addr - dev_priv->dma_low));
}

/*
 * How much does the command regulator lag behind?
 */

static uint32_t via_cmdbuf_lag(drm_via_private_t *dev_priv)
{
	uint32_t agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr;
	uint32_t hw_addr = *(dev_priv->hw_addr_ptr) - agp_base;
	
	return ((hw_addr <= dev_priv->dma_low) ? 
		(dev_priv->dma_low - hw_addr) : 
		(dev_priv->dma_wrap + dev_priv->dma_low - hw_addr));
}

/*
 * Check that the given size fits in the buffer, otherwise wait.
 */

static inline int
via_cmdbuf_wait(drm_via_private_t * dev_priv, unsigned int size)
{
	uint32_t agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr;
	uint32_t cur_addr, hw_addr, next_addr;
	volatile uint32_t *hw_addr_ptr;
	uint32_t count;
	hw_addr_ptr = dev_priv->hw_addr_ptr;
	cur_addr = dev_priv->dma_low;
	next_addr = cur_addr + size + 512*1024;
	count = 1000000;
	do {
		hw_addr = *hw_addr_ptr - agp_base;
		if (count-- == 0) {
			DRM_ERROR
			    ("via_cmdbuf_wait timed out hw %x cur_addr %x next_addr %x\n",
			    hw_addr, cur_addr, next_addr);
			return -1;
		}
	} while ((cur_addr < hw_addr) && (next_addr >= hw_addr));
	return 0;
}


/*
 * Checks whether buffer head has reach the end. Rewind the ring buffer
 * when necessary.
 *
 * Returns virtual pointer to ring buffer.
 */

static inline uint32_t *via_check_dma(drm_via_private_t * dev_priv,
				      unsigned int size)
{
	if ((dev_priv->dma_low + size + 4 * CMDBUF_ALIGNMENT_SIZE) >
	    dev_priv->dma_high) {
		via_cmdbuf_rewind(dev_priv);
	}
	if (via_cmdbuf_wait(dev_priv, size) != 0) {
		return NULL;
	}

	return (uint32_t *) (dev_priv->dma_ptr + dev_priv->dma_low);
}

int via_dma_cleanup(drm_device_t * dev)
{
	if (dev->dev_private) {
		drm_via_private_t *dev_priv =
			(drm_via_private_t *) dev->dev_private;

		if (dev_priv->ring.virtual_start) {
			via_cmdbuf_reset(dev_priv);

			drm_core_ioremapfree(&dev_priv->ring.map, dev);
			dev_priv->ring.virtual_start = NULL;
		}

	}

	return 0;
}

static int via_initialize(drm_device_t * dev,
			  drm_via_private_t * dev_priv,
			  drm_via_dma_init_t * init)
{
	if (!dev_priv || !dev_priv->mmio) {
		DRM_ERROR("via_dma_init called before via_map_init\n");
		return DRM_ERR(EFAULT);
	}

	if (dev_priv->ring.virtual_start != NULL) {
		DRM_ERROR("%s called again without calling cleanup\n",
			  __FUNCTION__);
		return DRM_ERR(EFAULT);
	}

	if (!dev->agp || !dev->agp->base) {
		DRM_ERROR("%s called with no agp memory available\n", 
			  __FUNCTION__);
		return DRM_ERR(EFAULT);
	}

	dev_priv->ring.map.offset = dev->agp->base + init->offset;
	dev_priv->ring.map.size = init->size;
	dev_priv->ring.map.type = 0;
	dev_priv->ring.map.flags = 0;
	dev_priv->ring.map.mtrr = 0;

	drm_core_ioremap(&dev_priv->ring.map, dev);

	if (dev_priv->ring.map.handle == NULL) {
		via_dma_cleanup(dev);
		DRM_ERROR("can not ioremap virtual address for"
			  " ring buffer\n");
		return DRM_ERR(ENOMEM);
	}

	dev_priv->ring.virtual_start = dev_priv->ring.map.handle;

	dev_priv->dma_ptr = dev_priv->ring.virtual_start;
	dev_priv->dma_low = 0;
	dev_priv->dma_high = init->size;
	dev_priv->dma_wrap = init->size;
	dev_priv->dma_offset = init->offset;
	dev_priv->last_pause_ptr = NULL;
	dev_priv->hw_addr_ptr =
	    (volatile uint32_t *)((char *)dev_priv->mmio->handle +
	    init->reg_pause_addr);

	via_cmdbuf_start(dev_priv);

	return 0;
}

static int via_dma_init(DRM_IOCTL_ARGS)
{
	DRM_DEVICE;
	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
	drm_via_dma_init_t init;
	int retcode = 0;

	DRM_COPY_FROM_USER_IOCTL(init, (drm_via_dma_init_t __user *) data,
				 sizeof(init));

	switch (init.func) {
	case VIA_INIT_DMA:
		if (!DRM_SUSER(DRM_CURPROC))
			retcode = DRM_ERR(EPERM);
		else
			retcode = via_initialize(dev, dev_priv, &init);
		break;
	case VIA_CLEANUP_DMA:
		if (!DRM_SUSER(DRM_CURPROC))
			retcode = DRM_ERR(EPERM);
		else
			retcode = via_dma_cleanup(dev);
		break;
	case VIA_DMA_INITIALIZED:
		retcode = (dev_priv->ring.virtual_start != NULL) ? 
			0: DRM_ERR( EFAULT );
		break;
	default:
		retcode = DRM_ERR(EINVAL);
		break;
	}

	return retcode;
}



static int via_dispatch_cmdbuffer(drm_device_t * dev, drm_via_cmdbuffer_t * cmd)
{
	drm_via_private_t *dev_priv;
	uint32_t *vb;
	int ret;

	dev_priv = (drm_via_private_t *) dev->dev_private;

	if (dev_priv->ring.virtual_start == NULL) {
		DRM_ERROR("%s called without initializing AGP ring buffer.\n",
			  __FUNCTION__);
		return DRM_ERR(EFAULT);
	}

	if (cmd->size > VIA_PCI_BUF_SIZE) {
		return DRM_ERR(ENOMEM);
	} 


	if (DRM_COPY_FROM_USER(dev_priv->pci_buf, cmd->buf, cmd->size))
		return DRM_ERR(EFAULT);

	/*
	 * Running this function on AGP memory is dead slow. Therefore
	 * we run it on a temporary cacheable system memory buffer and
	 * copy it to AGP memory when ready.
	 */

	if ((ret =
	     via_verify_command_stream((uint32_t *)dev_priv->pci_buf,
				       cmd->size, dev, 1))) {
		return ret;
	}
       	
	vb = via_check_dma(dev_priv, (cmd->size < 0x100) ? 0x102 : cmd->size);
	if (vb == NULL) {
		return DRM_ERR(EAGAIN);
	}

	memcpy(vb, dev_priv->pci_buf, cmd->size);
	
	dev_priv->dma_low += cmd->size;

	/*
	 * Small submissions somehow stalls the CPU. (AGP cache effects?)
	 * pad to greater size.
	 */

	if (cmd->size < 0x100)
	  via_pad_cache(dev_priv,(0x100 - cmd->size) >> 3);
	via_cmdbuf_pause(dev_priv);

	return 0;
}

int via_driver_dma_quiescent(drm_device_t * dev)
{
	drm_via_private_t *dev_priv = dev->dev_private;

	if (!via_wait_idle(dev_priv)) {
		return DRM_ERR(EBUSY);
	}
	return 0;
}

static int via_flush_ioctl(DRM_IOCTL_ARGS)
{
	DRM_DEVICE;

	LOCK_TEST_WITH_RETURN( dev, filp );

	return via_driver_dma_quiescent(dev);
}

static int via_cmdbuffer(DRM_IOCTL_ARGS)
{
	DRM_DEVICE;
	drm_via_cmdbuffer_t cmdbuf;
	int ret;

	LOCK_TEST_WITH_RETURN( dev, filp );

	DRM_COPY_FROM_USER_IOCTL(cmdbuf, (drm_via_cmdbuffer_t __user *) data,
				 sizeof(cmdbuf));

	DRM_DEBUG("via cmdbuffer, buf %p size %lu\n", cmdbuf.buf, cmdbuf.size);

	ret = via_dispatch_cmdbuffer(dev, &cmdbuf);
	if (ret) {
		return ret;
	}

	return 0;
}

static int via_dispatch_pci_cmdbuffer(drm_device_t * dev,
				      drm_via_cmdbuffer_t * cmd)
{
	drm_via_private_t *dev_priv = dev->dev_private;
	int ret;

	if (cmd->size > VIA_PCI_BUF_SIZE) {
		return DRM_ERR(ENOMEM);
	} 
	if (DRM_COPY_FROM_USER(dev_priv->pci_buf, cmd->buf, cmd->size))
		return DRM_ERR(EFAULT);
	
	if ((ret = 
	     via_verify_command_stream((uint32_t *)dev_priv->pci_buf,
				       cmd->size, dev, 0))) {
		return ret;
	}
	
	ret =
	    via_parse_command_stream(dev, (const uint32_t *)dev_priv->pci_buf,
				     cmd->size);
	return ret;
}

static int via_pci_cmdbuffer(DRM_IOCTL_ARGS)
{
	DRM_DEVICE;
	drm_via_cmdbuffer_t cmdbuf;
	int ret;

	LOCK_TEST_WITH_RETURN( dev, filp );

	DRM_COPY_FROM_USER_IOCTL(cmdbuf, (drm_via_cmdbuffer_t __user *) data,
				 sizeof(cmdbuf));

	DRM_DEBUG("via_pci_cmdbuffer, buf %p size %lu\n", cmdbuf.buf,
		  cmdbuf.size);

	ret = via_dispatch_pci_cmdbuffer(dev, &cmdbuf);
	if (ret) {
		return ret;
	}

	return 0;
}


static inline uint32_t *via_align_buffer(drm_via_private_t * dev_priv,
					 uint32_t * vb, int qw_count)
{
	for (; qw_count > 0; --qw_count) {
		VIA_OUT_RING_QW(HC_DUMMY, HC_DUMMY);
	}
	return vb;
}


/*
 * This function is used internally by ring buffer mangement code.
 *
 * Returns virtual pointer to ring buffer.
 */
static inline uint32_t *via_get_dma(drm_via_private_t * dev_priv)
{
	return (uint32_t *) (dev_priv->dma_ptr + dev_priv->dma_low);
}

/*
 * Hooks a segment of data into the tail of the ring-buffer by
 * modifying the pause address stored in the buffer itself. If
 * the regulator has already paused, restart it.
 */
static int via_hook_segment(drm_via_private_t *dev_priv,
			    uint32_t pause_addr_hi, uint32_t pause_addr_lo,
			    int no_pci_fire)
{
	int paused, count;
	volatile uint32_t *paused_at = dev_priv->last_pause_ptr;

	via_flush_write_combine();
	while(! *(via_get_dma(dev_priv)-1));
	*dev_priv->last_pause_ptr = pause_addr_lo;
	via_flush_write_combine();

	/*
	 * The below statement is inserted to really force the flush.
	 * Not sure it is needed.
	 */

	while(! *dev_priv->last_pause_ptr);
	dev_priv->last_pause_ptr = via_get_dma(dev_priv) - 1;
	while(! *dev_priv->last_pause_ptr);


	paused = 0;
	count = 20; 

	while (!(paused = (VIA_READ(0x41c) & 0x80000000)) && count--);
	if ((count <= 8) && (count >= 0)) {
		uint32_t rgtr, ptr;
		rgtr = *(dev_priv->hw_addr_ptr);
		ptr = ((volatile char *)dev_priv->last_pause_ptr -
		      dev_priv->dma_ptr) + dev_priv->dma_offset +
		      (uint32_t) dev_priv->agpAddr + 4 - CMDBUF_ALIGNMENT_SIZE;
		if (rgtr <= ptr) {
			DRM_ERROR
			   ("Command regulator\npaused at count %d, address %x, "
			    "while current pause address is %x.\n"
			    "Please mail this message to "
			    "<unichrome-devel@lists.sourceforge.net>\n", count,
			    rgtr, ptr);
		}
	}
		
	if (paused && !no_pci_fire) {
		uint32_t rgtr,ptr;
		uint32_t ptr_low;

		count = 1000000;
		while ((VIA_READ(VIA_REG_STATUS) & VIA_CMD_RGTR_BUSY)
		       && count--);
		
		rgtr = *(dev_priv->hw_addr_ptr);
		ptr = ((volatile char *)paused_at - dev_priv->dma_ptr) + 
			dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr + 4;
		

		ptr_low = (ptr > 3*CMDBUF_ALIGNMENT_SIZE) ? 
			ptr - 3*CMDBUF_ALIGNMENT_SIZE : 0;
		if (rgtr <= ptr && rgtr >= ptr_low) {
			VIA_WRITE(VIA_REG_TRANSET, (HC_ParaType_PreCR << 16));
			VIA_WRITE(VIA_REG_TRANSPACE, pause_addr_hi);
			VIA_WRITE(VIA_REG_TRANSPACE, pause_addr_lo);
			VIA_READ(VIA_REG_TRANSPACE);
		} 
	}
	return paused;
}



static int via_wait_idle(drm_via_private_t * dev_priv)
{
	int count = 10000000;
	while (count-- && (VIA_READ(VIA_REG_STATUS) &
			   (VIA_CMD_RGTR_BUSY | VIA_2D_ENG_BUSY |
			    VIA_3D_ENG_BUSY))) ;
	return count;
}

static uint32_t *via_align_cmd(drm_via_private_t * dev_priv, uint32_t cmd_type,
			       uint32_t addr, uint32_t *cmd_addr_hi, 
			       uint32_t *cmd_addr_lo, int skip_wait)
{
	uint32_t agp_base;
	uint32_t cmd_addr, addr_lo, addr_hi;
	uint32_t *vb;
	uint32_t qw_pad_count;

	if (!skip_wait)
		via_cmdbuf_wait(dev_priv, 2*CMDBUF_ALIGNMENT_SIZE);

	vb = via_get_dma(dev_priv);
	VIA_OUT_RING_QW( HC_HEADER2 | ((VIA_REG_TRANSET >> 2) << 12) |
			 (VIA_REG_TRANSPACE >> 2), HC_ParaType_PreCR << 16); 
	agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr;
	qw_pad_count = (CMDBUF_ALIGNMENT_SIZE >> 3) -
		((dev_priv->dma_low & CMDBUF_ALIGNMENT_MASK) >> 3);

	cmd_addr = (addr) ? addr : 
		agp_base + dev_priv->dma_low - 8 + (qw_pad_count << 3);
	addr_lo = ((HC_SubA_HAGPBpL << 24) | (cmd_type & HC_HAGPBpID_MASK) |
		   (cmd_addr & HC_HAGPBpL_MASK));
	addr_hi = ((HC_SubA_HAGPBpH << 24) | (cmd_addr >> 24));

	vb = via_align_buffer(dev_priv, vb, qw_pad_count - 1);
	VIA_OUT_RING_QW(*cmd_addr_hi = addr_hi, *cmd_addr_lo = addr_lo);
	return vb;
}




static void via_cmdbuf_start(drm_via_private_t * dev_priv)
{
	uint32_t pause_addr_lo, pause_addr_hi;
	uint32_t start_addr, start_addr_lo;
	uint32_t end_addr, end_addr_lo;
	uint32_t command;
	uint32_t agp_base;


	dev_priv->dma_low = 0;

	agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr;
	start_addr = agp_base;
	end_addr = agp_base + dev_priv->dma_high;

	start_addr_lo = ((HC_SubA_HAGPBstL << 24) | (start_addr & 0xFFFFFF));
	end_addr_lo = ((HC_SubA_HAGPBendL << 24) | (end_addr & 0xFFFFFF));
	command = ((HC_SubA_HAGPCMNT << 24) | (start_addr >> 24) |
		   ((end_addr & 0xff000000) >> 16));

	dev_priv->last_pause_ptr = 
		via_align_cmd(dev_priv, HC_HAGPBpID_PAUSE, 0, 
			      &pause_addr_hi, & pause_addr_lo, 1) - 1;

	via_flush_write_combine();
	while(! *dev_priv->last_pause_ptr);

	VIA_WRITE(VIA_REG_TRANSET, (HC_ParaType_PreCR << 16));
	VIA_WRITE(VIA_REG_TRANSPACE, command);
	VIA_WRITE(VIA_REG_TRANSPACE, start_addr_lo);
	VIA_WRITE(VIA_REG_TRANSPACE, end_addr_lo);

	VIA_WRITE(VIA_REG_TRANSPACE, pause_addr_hi);
	VIA_WRITE(VIA_REG_TRANSPACE, pause_addr_lo);
	DRM_WRITEMEMORYBARRIER();
	VIA_WRITE(VIA_REG_TRANSPACE, command | HC_HAGPCMNT_MASK);
	VIA_READ(VIA_REG_TRANSPACE);
}

static void via_pad_cache(drm_via_private_t *dev_priv, int qwords)
{
	uint32_t *vb;

	via_cmdbuf_wait(dev_priv, qwords + 2);
	vb = via_get_dma(dev_priv);
	VIA_OUT_RING_QW( HC_HEADER2, HC_ParaType_NotTex << 16);
	via_align_buffer(dev_priv,vb,qwords);
}

static inline void via_dummy_bitblt(drm_via_private_t * dev_priv)
{
	uint32_t *vb = via_get_dma(dev_priv);
	SetReg2DAGP(0x0C, (0 | (0 << 16)));
	SetReg2DAGP(0x10, 0 | (0 << 16));
	SetReg2DAGP(0x0, 0x1 | 0x2000 | 0xAA000000); 
}


static void via_cmdbuf_jump(drm_via_private_t * dev_priv)
{
	uint32_t agp_base;
	uint32_t pause_addr_lo, pause_addr_hi;
	uint32_t jump_addr_lo, jump_addr_hi;
	volatile uint32_t *last_pause_ptr;
	uint32_t dma_low_save1, dma_low_save2;

	agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr;
	via_align_cmd(dev_priv,  HC_HAGPBpID_JUMP, 0, &jump_addr_hi, 
		      &jump_addr_lo, 0);
	
	dev_priv->dma_wrap = dev_priv->dma_low;


	/*
	 * Wrap command buffer to the beginning.
	 */

	dev_priv->dma_low = 0;
	if (via_cmdbuf_wait(dev_priv, CMDBUF_ALIGNMENT_SIZE) != 0) {
		DRM_ERROR("via_cmdbuf_jump failed\n");
	}

	via_dummy_bitblt(dev_priv);
	via_dummy_bitblt(dev_priv); 

	last_pause_ptr =
	    via_align_cmd(dev_priv,  HC_HAGPBpID_PAUSE, 0, &pause_addr_hi, 
				       &pause_addr_lo, 0) -1;
	via_align_cmd(dev_priv,  HC_HAGPBpID_PAUSE, 0, &pause_addr_hi, 
		      &pause_addr_lo, 0);

	*last_pause_ptr = pause_addr_lo;
	dma_low_save1 = dev_priv->dma_low;

	/*
	 * Now, set a trap that will pause the regulator if it tries to rerun the old
	 * command buffer. (Which may happen if via_hook_segment detecs a command regulator pause
	 * and reissues the jump command over PCI, while the regulator has already taken the jump
	 * and actually paused at the current buffer end).
	 * There appears to be no other way to detect this condition, since the hw_addr_pointer
	 * does not seem to get updated immediately when a jump occurs.
	 */

	last_pause_ptr =
	    via_align_cmd(dev_priv,  HC_HAGPBpID_PAUSE, 0, &pause_addr_hi, 
				       &pause_addr_lo, 0) -1;
	via_align_cmd(dev_priv,  HC_HAGPBpID_PAUSE, 0, &pause_addr_hi, 
		      &pause_addr_lo, 0);
	*last_pause_ptr = pause_addr_lo;

	dma_low_save2 = dev_priv->dma_low;
	dev_priv->dma_low = dma_low_save1;	
	via_hook_segment( dev_priv, jump_addr_hi, jump_addr_lo, 0);
	dev_priv->dma_low = dma_low_save2;
	via_hook_segment( dev_priv, pause_addr_hi, pause_addr_lo, 0);
}


static void via_cmdbuf_rewind(drm_via_private_t * dev_priv)
{
	via_cmdbuf_jump(dev_priv); 
}

static void via_cmdbuf_flush(drm_via_private_t * dev_priv, uint32_t cmd_type)
{
	uint32_t pause_addr_lo, pause_addr_hi;

	via_align_cmd(dev_priv, cmd_type, 0, &pause_addr_hi, &pause_addr_lo, 0);
	via_hook_segment( dev_priv, pause_addr_hi, pause_addr_lo, 0);
}


static void via_cmdbuf_pause(drm_via_private_t * dev_priv)
{
	via_cmdbuf_flush(dev_priv, HC_HAGPBpID_PAUSE);
}

static void via_cmdbuf_reset(drm_via_private_t * dev_priv)
{
	via_cmdbuf_flush(dev_priv, HC_HAGPBpID_STOP);
	via_wait_idle(dev_priv);
}

/*
 * User interface to the space and lag functions.
 */

static int via_cmdbuf_size(DRM_IOCTL_ARGS)
{
	DRM_DEVICE;
	drm_via_cmdbuf_size_t d_siz;
	int ret = 0;
	uint32_t tmp_size, count;
	drm_via_private_t *dev_priv;

	DRM_DEBUG("via cmdbuf_size\n");
	LOCK_TEST_WITH_RETURN( dev, filp );

	dev_priv = (drm_via_private_t *) dev->dev_private;

	if (dev_priv->ring.virtual_start == NULL) {
		DRM_ERROR("%s called without initializing AGP ring buffer.\n",
			  __FUNCTION__);
		return DRM_ERR(EFAULT);
	}

	DRM_COPY_FROM_USER_IOCTL(d_siz, (drm_via_cmdbuf_size_t __user *) data,
				 sizeof(d_siz));


	count = 1000000;
	tmp_size = d_siz.size;
	switch(d_siz.func) {
	case VIA_CMDBUF_SPACE:
		while (((tmp_size = via_cmdbuf_space(dev_priv)) < d_siz.size)
		       && count--) {
			if (!d_siz.wait) {
				break;
			}
		}
		if (!count) {
			DRM_ERROR("VIA_CMDBUF_SPACE timed out.\n");
			ret = DRM_ERR(EAGAIN);
		}
		break;
	case VIA_CMDBUF_LAG:
		while (((tmp_size = via_cmdbuf_lag(dev_priv)) > d_siz.size)
		       && count--) {
			if (!d_siz.wait) {
				break;
			}
		}
		if (!count) {
			DRM_ERROR("VIA_CMDBUF_LAG timed out.\n");
			ret = DRM_ERR(EAGAIN);
		}
		break;
	default:
		ret = DRM_ERR(EFAULT);
	}
	d_siz.size = tmp_size;

	DRM_COPY_TO_USER_IOCTL((drm_via_cmdbuf_size_t __user *) data, d_siz,
			       sizeof(d_siz));
	return ret;
}

#ifndef VIA_HAVE_DMABLIT
int 
via_dma_blit_sync( DRM_IOCTL_ARGS ) {
	DRM_ERROR("PCI DMA BitBlt is not implemented for this system.\n");
	return DRM_ERR(EINVAL);
}
int 
via_dma_blit( DRM_IOCTL_ARGS ) {
	DRM_ERROR("PCI DMA BitBlt is not implemented for this system.\n");
	return DRM_ERR(EINVAL);
}
#endif

drm_ioctl_desc_t via_ioctls[] = {
	[DRM_IOCTL_NR(DRM_VIA_ALLOCMEM)] = {via_mem_alloc, DRM_AUTH},
	[DRM_IOCTL_NR(DRM_VIA_FREEMEM)] = {via_mem_free, DRM_AUTH},
	[DRM_IOCTL_NR(DRM_VIA_AGP_INIT)] = {via_agp_init, DRM_AUTH|DRM_MASTER},
	[DRM_IOCTL_NR(DRM_VIA_FB_INIT)] = {via_fb_init, DRM_AUTH|DRM_MASTER},
	[DRM_IOCTL_NR(DRM_VIA_MAP_INIT)] = {via_map_init, DRM_AUTH|DRM_MASTER},
	[DRM_IOCTL_NR(DRM_VIA_DEC_FUTEX)] = {via_decoder_futex, DRM_AUTH},
	[DRM_IOCTL_NR(DRM_VIA_DMA_INIT)] = {via_dma_init, DRM_AUTH},
	[DRM_IOCTL_NR(DRM_VIA_CMDBUFFER)] = {via_cmdbuffer, DRM_AUTH},
	[DRM_IOCTL_NR(DRM_VIA_FLUSH)] = {via_flush_ioctl, DRM_AUTH},
	[DRM_IOCTL_NR(DRM_VIA_PCICMD)] = {via_pci_cmdbuffer, DRM_AUTH},
	[DRM_IOCTL_NR(DRM_VIA_CMDBUF_SIZE)] = {via_cmdbuf_size, DRM_AUTH},
	[DRM_IOCTL_NR(DRM_VIA_WAIT_IRQ)] = {via_wait_irq, DRM_AUTH},
	[DRM_IOCTL_NR(DRM_VIA_DMA_BLIT)] = {via_dma_blit, DRM_AUTH},
	[DRM_IOCTL_NR(DRM_VIA_BLIT_SYNC)] = {via_dma_blit_sync, DRM_AUTH}
};

int via_max_ioctl = DRM_ARRAY_SIZE(via_ioctls);
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-04 00:25:03 +0000