Logo Search packages:      
Sourcecode: linux version File versions  Download package

via_dma.c

/* 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(struct drm_device * 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(struct drm_device * 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 -EFAULT;
      }

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

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

      if (dev_priv->chipset == VIA_DX9_0) {
            DRM_ERROR("AGP DMA is not supported on this chip\n");
            return -EINVAL;
      }

      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 -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(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
      drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
      drm_via_dma_init_t *init = data;
      int retcode = 0;

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

      return retcode;
}

static int via_dispatch_cmdbuffer(struct drm_device * 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 -EFAULT;
      }

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

      if (DRM_COPY_FROM_USER(dev_priv->pci_buf, cmd->buf, cmd->size))
            return -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 -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(struct drm_device * dev)
{
      drm_via_private_t *dev_priv = dev->dev_private;

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

static int via_flush_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
{

      LOCK_TEST_WITH_RETURN(dev, file_priv);

      return via_driver_dma_quiescent(dev);
}

static int via_cmdbuffer(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
      drm_via_cmdbuffer_t *cmdbuf = data;
      int ret;

      LOCK_TEST_WITH_RETURN(dev, file_priv);

      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(struct drm_device * 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 -ENOMEM;
      }
      if (DRM_COPY_FROM_USER(dev_priv->pci_buf, cmd->buf, cmd->size))
            return -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(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
      drm_via_cmdbuffer_t *cmdbuf = data;
      int ret;

      LOCK_TEST_WITH_RETURN(dev, file_priv);

      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;
      uint32_t reader,ptr;

      paused = 0;
      via_flush_write_combine();
      (void) *(volatile uint32_t *)(via_get_dma(dev_priv) -1);
      *paused_at = pause_addr_lo;
      via_flush_write_combine();
      (void) *paused_at;
      reader = *(dev_priv->hw_addr_ptr);
      ptr = ((volatile char *)paused_at - dev_priv->dma_ptr) +
            dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr + 4;
      dev_priv->last_pause_ptr = via_get_dma(dev_priv) - 1;

      if ((ptr - reader) <= dev_priv->dma_diff ) {
            count = 10000000;
            while (!(paused = (VIA_READ(0x41c) & 0x80000000)) && count--);
      }

      if (paused && !no_pci_fire) {
            reader = *(dev_priv->hw_addr_ptr);
            if ((ptr - reader) == dev_priv->dma_diff) {

                  /*
                   * There is a concern that these writes may stall the PCI bus
                   * if the GPU is not idle. However, idling the GPU first
                   * doesn't make a difference.
                   */

                  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 (!(VIA_READ(VIA_REG_STATUS) & VIA_VR_QUEUE_BUSY) && count--);

      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;
      uint32_t ptr;
      uint32_t reader;
      int count;

      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();
      (void) *(volatile uint32_t *)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);

      dev_priv->dma_diff = 0;

      count = 10000000;
      while (!(VIA_READ(0x41c) & 0x80000000) && count--);

      reader = *(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;

      /*
       * This is the difference between where we tell the
       * command reader to pause and where it actually pauses.
       * This differs between hw implementation so we need to
       * detect it.
       */

      dev_priv->dma_diff = ptr - reader;
}

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;

      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;

      via_hook_segment( dev_priv, jump_addr_hi, jump_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(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
      drm_via_cmdbuf_size_t *d_siz = data;
      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, file_priv);

      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 -EFAULT;
      }

      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 = -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 = -EAGAIN;
            }
            break;
      default:
            ret = -EFAULT;
      }
      d_siz->size = tmp_size;

      return ret;
}

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

int via_max_ioctl = DRM_ARRAY_SIZE(via_ioctls);

Generated by  Doxygen 1.6.0   Back to index