summaryrefslogtreecommitdiff
path: root/shared/via_dma.c
diff options
context:
space:
mode:
Diffstat (limited to 'shared/via_dma.c')
-rw-r--r--shared/via_dma.c742
1 files changed, 0 insertions, 742 deletions
diff --git a/shared/via_dma.c b/shared/via_dma.c
deleted file mode 100644
index 672552e4..00000000
--- a/shared/via_dma.c
+++ /dev/null
@@ -1,742 +0,0 @@
-/* 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 "via.h"
-#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 = dev_priv->mmio->handle + init->reg_pause_addr;
-
- via_cmdbuf_start(dev_priv);
-
- return 0;
-}
-
-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 *) data,
- sizeof(init));
-
- switch (init.func) {
- case VIA_INIT_DMA:
- if (!capable(CAP_SYS_ADMIN))
- retcode = DRM_ERR(EPERM);
- else
- retcode = via_initialize(dev, dev_priv, &init);
- break;
- case VIA_CLEANUP_DMA:
- if (!capable(CAP_SYS_ADMIN))
- 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;
-}
-
-int via_flush_ioctl(DRM_IOCTL_ARGS)
-{
- DRM_DEVICE;
-
- LOCK_TEST_WITH_RETURN( dev, filp );
-
- return via_driver_dma_quiescent(dev);
-}
-
-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 *) 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;
-}
-
-extern int
-via_parse_command_stream(drm_device_t *dev, const uint32_t * buf, unsigned int size);
-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;
-}
-
-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 *) 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 = ((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 = ((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);
- }
- }
- 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);
-
- VIA_WRITE(VIA_REG_TRANSPACE, command | HC_HAGPCMNT_MASK);
-}
-
-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.
- */
-
-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 *) 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 *) data, d_siz,
- sizeof(d_siz));
- return ret;
-}