+ dev->counters += 3;
+ dev->types[6] = _DRM_STAT_IRQ;
+ dev->types[7] = _DRM_STAT_PRIMARY;
+ dev->types[8] = _DRM_STAT_SECONDARY;
+
+ return 0;
+}
+
+#if __OS_HAS_AGP
+/**
+ * Bootstrap the driver for AGP DMA.
+ *
+ * \todo
+ * Investigate whether there is any benifit to storing the WARP microcode in
+ * AGP memory. If not, the microcode may as well always be put in PCI
+ * memory.
+ *
+ * \todo
+ * This routine needs to set dma_bs->agp_mode to the mode actually configured
+ * in the hardware. Looking just at the Linux AGP driver code, I don't see
+ * an easy way to determine this.
+ *
+ * \sa mga_do_dma_bootstrap, mga_do_pci_dma_bootstrap
+ */
+static int mga_do_agp_dma_bootstrap(drm_device_t * dev,
+ drm_mga_dma_bootstrap_t * dma_bs)
+{
+ drm_mga_private_t *const dev_priv =
+ (drm_mga_private_t *) dev->dev_private;
+ unsigned int warp_size = mga_warp_microcode_size(dev_priv);
+ int err;
+ unsigned offset;
+ const unsigned secondary_size = dma_bs->secondary_bin_count
+ * dma_bs->secondary_bin_size;
+ const unsigned agp_size = (dma_bs->agp_size << 20);
+ drm_buf_desc_t req;
+ drm_agp_mode_t mode;
+ drm_agp_info_t info;
+ drm_agp_buffer_t agp_req;
+ drm_agp_binding_t bind_req;
+
+ /* Acquire AGP. */
+ err = drm_agp_acquire(dev);
+ if (err) {
+ DRM_ERROR("Unable to acquire AGP: %d\n", err);
+ return err;
+ }
+
+ err = drm_agp_info(dev, &info);
+ if (err) {
+ DRM_ERROR("Unable to get AGP info: %d\n", err);
+ return err;
+ }
+
+ mode.mode = (info.mode & ~0x07) | dma_bs->agp_mode;
+ err = drm_agp_enable(dev, mode);
+ if (err) {
+ DRM_ERROR("Unable to enable AGP (mode = 0x%lx)\n", mode.mode);
+ return err;
+ }
+
+ /* In addition to the usual AGP mode configuration, the G200 AGP cards
+ * need to have the AGP mode "manually" set.
+ */
+
+ if (dev_priv->chipset == MGA_CARD_TYPE_G200) {
+ if (mode.mode & 0x02) {
+ MGA_WRITE(MGA_AGP_PLL, MGA_AGP2XPLL_ENABLE);
+ } else {
+ MGA_WRITE(MGA_AGP_PLL, MGA_AGP2XPLL_DISABLE);
+ }
+ }
+
+ /* Allocate and bind AGP memory. */
+ agp_req.size = agp_size;
+ agp_req.type = 0;
+ err = drm_agp_alloc(dev, &agp_req);
+ if (err) {
+ dev_priv->agp_size = 0;
+ DRM_ERROR("Unable to allocate %uMB AGP memory\n",
+ dma_bs->agp_size);
+ return err;
+ }
+
+ dev_priv->agp_size = agp_size;
+ dev_priv->agp_handle = agp_req.handle;
+
+ bind_req.handle = agp_req.handle;
+ bind_req.offset = 0;
+ err = drm_agp_bind(dev, &bind_req);
+ if (err) {
+ DRM_ERROR("Unable to bind AGP memory: %d\n", err);
+ return err;
+ }
+
+ /* Make drm_addbufs happy by not trying to create a mapping for less
+ * than a page.
+ */
+ if (warp_size < PAGE_SIZE)
+ warp_size = PAGE_SIZE;
+
+ offset = 0;
+ err = drm_addmap(dev, offset, warp_size,
+ _DRM_AGP, _DRM_READ_ONLY, &dev_priv->warp);
+ if (err) {
+ DRM_ERROR("Unable to map WARP microcode: %d\n", err);
+ return err;
+ }
+
+ offset += warp_size;
+ err = drm_addmap(dev, offset, dma_bs->primary_size,
+ _DRM_AGP, _DRM_READ_ONLY, &dev_priv->primary);
+ if (err) {
+ DRM_ERROR("Unable to map primary DMA region: %d\n", err);
+ return err;
+ }
+
+ offset += dma_bs->primary_size;
+ err = drm_addmap(dev, offset, secondary_size,
+ _DRM_AGP, 0, &dev->agp_buffer_map);
+ if (err) {
+ DRM_ERROR("Unable to map secondary DMA region: %d\n", err);
+ return err;
+ }
+
+ (void)memset(&req, 0, sizeof(req));
+ req.count = dma_bs->secondary_bin_count;
+ req.size = dma_bs->secondary_bin_size;
+ req.flags = _DRM_AGP_BUFFER;
+ req.agp_start = offset;
+
+ err = drm_addbufs_agp(dev, &req);
+ if (err) {
+ DRM_ERROR("Unable to add secondary DMA buffers: %d\n", err);
+ return err;
+ }
+
+ {
+ drm_map_list_t *_entry;
+ unsigned long agp_token = 0;
+
+ list_for_each_entry(_entry, &dev->maplist->head, head) {
+ if (_entry->map == dev->agp_buffer_map)
+ agp_token = _entry->user_token;
+ }
+ if (!agp_token)
+ return -EFAULT;
+
+ dev->agp_buffer_token = agp_token;
+ }
+
+ offset += secondary_size;
+ err = drm_addmap(dev, offset, agp_size - offset,
+ _DRM_AGP, 0, &dev_priv->agp_textures);
+ if (err) {
+ DRM_ERROR("Unable to map AGP texture region %d\n", err);
+ return err;
+ }
+
+ drm_core_ioremap(dev_priv->warp, dev);
+ drm_core_ioremap(dev_priv->primary, dev);
+ drm_core_ioremap(dev->agp_buffer_map, dev);
+
+ if (!dev_priv->warp->handle ||
+ !dev_priv->primary->handle || !dev->agp_buffer_map->handle) {
+ DRM_ERROR("failed to ioremap agp regions! (%p, %p, %p)\n",
+ dev_priv->warp->handle, dev_priv->primary->handle,
+ dev->agp_buffer_map->handle);
+ return DRM_ERR(ENOMEM);
+ }
+
+ dev_priv->dma_access = MGA_PAGPXFER;
+ dev_priv->wagp_enable = MGA_WAGP_ENABLE;
+
+ DRM_INFO("Initialized card for AGP DMA.\n");
+ return 0;
+}
+#else
+static int mga_do_agp_dma_bootstrap(drm_device_t * dev,
+ drm_mga_dma_bootstrap_t * dma_bs)
+{
+ return -EINVAL;
+}
+#endif
+
+/**
+ * Bootstrap the driver for PCI DMA.
+ *
+ * \todo
+ * The algorithm for decreasing the size of the primary DMA buffer could be
+ * better. The size should be rounded up to the nearest page size, then
+ * decrease the request size by a single page each pass through the loop.
+ *
+ * \todo
+ * Determine whether the maximum address passed to drm_pci_alloc is correct.
+ * The same goes for drm_addbufs_pci.
+ *
+ * \sa mga_do_dma_bootstrap, mga_do_agp_dma_bootstrap
+ */
+static int mga_do_pci_dma_bootstrap(drm_device_t * dev,
+ drm_mga_dma_bootstrap_t * dma_bs)
+{
+ drm_mga_private_t *const dev_priv =
+ (drm_mga_private_t *) dev->dev_private;
+ unsigned int warp_size = mga_warp_microcode_size(dev_priv);
+ unsigned int primary_size;
+ unsigned int bin_count;
+ int err;
+ drm_buf_desc_t req;
+
+ if (dev->dma == NULL) {
+ DRM_ERROR("dev->dma is NULL\n");
+ return DRM_ERR(EFAULT);
+ }
+
+ /* Make drm_addbufs happy by not trying to create a mapping for less
+ * than a page.
+ */
+ if (warp_size < PAGE_SIZE)
+ warp_size = PAGE_SIZE;
+
+ /* The proper alignment is 0x100 for this mapping */
+ err = drm_addmap(dev, 0, warp_size, _DRM_CONSISTENT,
+ _DRM_READ_ONLY, &dev_priv->warp);
+ if (err != 0) {
+ DRM_ERROR("Unable to create mapping for WARP microcode: %d\n",
+ err);
+ return err;
+ }
+
+ /* Other than the bottom two bits being used to encode other
+ * information, there don't appear to be any restrictions on the
+ * alignment of the primary or secondary DMA buffers.
+ */
+
+ for (primary_size = dma_bs->primary_size; primary_size != 0;
+ primary_size >>= 1) {
+ /* The proper alignment for this mapping is 0x04 */
+ err = drm_addmap(dev, 0, primary_size, _DRM_CONSISTENT,
+ _DRM_READ_ONLY, &dev_priv->primary);
+ if (!err)
+ break;
+ }
+
+ if (err != 0) {
+ DRM_ERROR("Unable to allocate primary DMA region: %d\n", err);
+ return DRM_ERR(ENOMEM);
+ }
+
+ if (dev_priv->primary->size != dma_bs->primary_size) {
+ DRM_INFO("Primary DMA buffer size reduced from %u to %u.\n",
+ dma_bs->primary_size,
+ (unsigned)dev_priv->primary->size);
+ dma_bs->primary_size = dev_priv->primary->size;
+ }
+
+ for (bin_count = dma_bs->secondary_bin_count; bin_count > 0;
+ bin_count--) {
+ (void)memset(&req, 0, sizeof(req));
+ req.count = bin_count;
+ req.size = dma_bs->secondary_bin_size;
+
+ err = drm_addbufs_pci(dev, &req);
+ if (!err) {
+ break;
+ }
+ }
+
+ if (bin_count == 0) {
+ DRM_ERROR("Unable to add secondary DMA buffers: %d\n", err);
+ return err;
+ }
+
+ if (bin_count != dma_bs->secondary_bin_count) {
+ DRM_INFO("Secondary PCI DMA buffer bin count reduced from %u "
+ "to %u.\n", dma_bs->secondary_bin_count, bin_count);
+
+ dma_bs->secondary_bin_count = bin_count;
+ }
+
+ dev_priv->dma_access = 0;
+ dev_priv->wagp_enable = 0;
+
+ dma_bs->agp_mode = 0;
+
+ DRM_INFO("Initialized card for PCI DMA.\n");
+ return 0;
+}
+
+static int mga_do_dma_bootstrap(drm_device_t * dev,
+ drm_mga_dma_bootstrap_t * dma_bs)
+{
+ const int is_agp = (dma_bs->agp_mode != 0) && drm_device_is_agp(dev);
+ int err;
+ drm_mga_private_t *const dev_priv =
+ (drm_mga_private_t *) dev->dev_private;
+
+ dev_priv->used_new_dma_init = 1;
+
+ /* The first steps are the same for both PCI and AGP based DMA. Map
+ * the cards MMIO registers and map a status page.
+ */
+ err = drm_addmap(dev, dev_priv->mmio_base, dev_priv->mmio_size,
+ _DRM_REGISTERS, _DRM_READ_ONLY, &dev_priv->mmio);
+ if (err) {
+ DRM_ERROR("Unable to map MMIO region: %d\n", err);
+ return err;
+ }
+
+ err = drm_addmap(dev, 0, SAREA_MAX, _DRM_SHM,
+ _DRM_READ_ONLY | _DRM_LOCKED | _DRM_KERNEL,
+ &dev_priv->status);
+ if (err) {
+ DRM_ERROR("Unable to map status region: %d\n", err);
+ return err;
+ }
+
+ /* The DMA initialization procedure is slightly different for PCI and
+ * AGP cards. AGP cards just allocate a large block of AGP memory and
+ * carve off portions of it for internal uses. The remaining memory
+ * is returned to user-mode to be used for AGP textures.
+ */
+ if (is_agp) {
+ err = mga_do_agp_dma_bootstrap(dev, dma_bs);
+ }
+
+ /* If we attempted to initialize the card for AGP DMA but failed,
+ * clean-up any mess that may have been created.
+ */
+
+ if (err) {
+ mga_do_cleanup_dma(dev, MINIMAL_CLEANUP);
+ }
+
+ /* Not only do we want to try and initialized PCI cards for PCI DMA,
+ * but we also try to initialized AGP cards that could not be
+ * initialized for AGP DMA. This covers the case where we have an AGP
+ * card in a system with an unsupported AGP chipset. In that case the
+ * card will be detected as AGP, but we won't be able to allocate any
+ * AGP memory, etc.
+ */
+
+ if (!is_agp || err) {
+ err = mga_do_pci_dma_bootstrap(dev, dma_bs);
+ }
+
+ return err;
+}
+
+int mga_dma_bootstrap(DRM_IOCTL_ARGS)
+{
+ DRM_DEVICE;
+ drm_mga_dma_bootstrap_t bootstrap;
+ int err;
+ static const int modes[] = { 0, 1, 2, 2, 4, 4, 4, 4 };
+ const drm_mga_private_t *const dev_priv =
+ (drm_mga_private_t *) dev->dev_private;
+
+ DRM_COPY_FROM_USER_IOCTL(bootstrap,
+ (drm_mga_dma_bootstrap_t __user *) data,
+ sizeof(bootstrap));
+
+ err = mga_do_dma_bootstrap(dev, &bootstrap);
+ if (err) {
+ mga_do_cleanup_dma(dev, FULL_CLEANUP);
+ return err;
+ }
+
+ if (dev_priv->agp_textures != NULL) {
+ bootstrap.texture_handle = dev_priv->agp_textures->offset;
+ bootstrap.texture_size = dev_priv->agp_textures->size;
+ } else {
+ bootstrap.texture_handle = 0;
+ bootstrap.texture_size = 0;
+ }
+
+ bootstrap.agp_mode = modes[bootstrap.agp_mode & 0x07];
+ DRM_COPY_TO_USER_IOCTL((drm_mga_dma_bootstrap_t __user *)data,
+ bootstrap, sizeof(bootstrap));
+
+ return err;
+}
+
+static int mga_do_init_dma(drm_device_t * dev, drm_mga_init_t * init)
+{
+ drm_mga_private_t *dev_priv;
+ int ret;
+ DRM_DEBUG("\n");
+
+ dev_priv = dev->dev_private;
+
+ if (init->sgram) {