| /* mga_dma.c -- DMA support for mga g200/g400 -*- linux-c -*- |
| * Created: Mon Dec 13 01:50:01 1999 by jhartmann@precisioninsight.com |
| * |
| * 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. |
| */ |
| |
| /** |
| * \file mga_dma.c |
| * DMA support for MGA G200 / G400. |
| * |
| * \author Rickard E. (Rik) Faith <faith@valinux.com> |
| * \author Jeff Hartmann <jhartmann@valinux.com> |
| * \author Keith Whitwell <keith@tungstengraphics.com> |
| * \author Gareth Hughes <gareth@valinux.com> |
| */ |
| |
| #include <linux/delay.h> |
| |
| #include "mga_drv.h" |
| |
| #define MGA_DEFAULT_USEC_TIMEOUT 10000 |
| #define MGA_FREELIST_DEBUG 0 |
| |
| #define MINIMAL_CLEANUP 0 |
| #define FULL_CLEANUP 1 |
| static int mga_do_cleanup_dma(struct drm_device *dev, int full_cleanup); |
| |
| /* ================================================================ |
| * Engine control |
| */ |
| |
| int mga_do_wait_for_idle(drm_mga_private_t *dev_priv) |
| { |
| u32 status = 0; |
| int i; |
| DRM_DEBUG("\n"); |
| |
| for (i = 0; i < dev_priv->usec_timeout; i++) { |
| status = MGA_READ(MGA_STATUS) & MGA_ENGINE_IDLE_MASK; |
| if (status == MGA_ENDPRDMASTS) { |
| MGA_WRITE8(MGA_CRTC_INDEX, 0); |
| return 0; |
| } |
| udelay(1); |
| } |
| |
| #if MGA_DMA_DEBUG |
| DRM_ERROR("failed!\n"); |
| DRM_INFO(" status=0x%08x\n", status); |
| #endif |
| return -EBUSY; |
| } |
| |
| static int mga_do_dma_reset(drm_mga_private_t *dev_priv) |
| { |
| drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv; |
| drm_mga_primary_buffer_t *primary = &dev_priv->prim; |
| |
| DRM_DEBUG("\n"); |
| |
| /* The primary DMA stream should look like new right about now. |
| */ |
| primary->tail = 0; |
| primary->space = primary->size; |
| primary->last_flush = 0; |
| |
| sarea_priv->last_wrap = 0; |
| |
| /* FIXME: Reset counters, buffer ages etc... |
| */ |
| |
| /* FIXME: What else do we need to reinitialize? WARP stuff? |
| */ |
| |
| return 0; |
| } |
| |
| /* ================================================================ |
| * Primary DMA stream |
| */ |
| |
| void mga_do_dma_flush(drm_mga_private_t *dev_priv) |
| { |
| drm_mga_primary_buffer_t *primary = &dev_priv->prim; |
| u32 head, tail; |
| u32 status = 0; |
| int i; |
| DMA_LOCALS; |
| DRM_DEBUG("\n"); |
| |
| /* We need to wait so that we can do an safe flush */ |
| for (i = 0; i < dev_priv->usec_timeout; i++) { |
| status = MGA_READ(MGA_STATUS) & MGA_ENGINE_IDLE_MASK; |
| if (status == MGA_ENDPRDMASTS) |
| break; |
| udelay(1); |
| } |
| |
| if (primary->tail == primary->last_flush) { |
| DRM_DEBUG(" bailing out...\n"); |
| return; |
| } |
| |
| tail = primary->tail + dev_priv->primary->offset; |
| |
| /* We need to pad the stream between flushes, as the card |
| * actually (partially?) reads the first of these commands. |
| * See page 4-16 in the G400 manual, middle of the page or so. |
| */ |
| BEGIN_DMA(1); |
| |
| DMA_BLOCK(MGA_DMAPAD, 0x00000000, |
| MGA_DMAPAD, 0x00000000, |
| MGA_DMAPAD, 0x00000000, MGA_DMAPAD, 0x00000000); |
| |
| ADVANCE_DMA(); |
| |
| primary->last_flush = primary->tail; |
| |
| head = MGA_READ(MGA_PRIMADDRESS); |
| |
| if (head <= tail) |
| primary->space = primary->size - primary->tail; |
| else |
| primary->space = head - tail; |
| |
| DRM_DEBUG(" head = 0x%06lx\n", (unsigned long)(head - dev_priv->primary->offset)); |
| DRM_DEBUG(" tail = 0x%06lx\n", (unsigned long)(tail - dev_priv->primary->offset)); |
| DRM_DEBUG(" space = 0x%06x\n", primary->space); |
| |
| mga_flush_write_combine(); |
| MGA_WRITE(MGA_PRIMEND, tail | dev_priv->dma_access); |
| |
| DRM_DEBUG("done.\n"); |
| } |
| |
| void mga_do_dma_wrap_start(drm_mga_private_t *dev_priv) |
| { |
| drm_mga_primary_buffer_t *primary = &dev_priv->prim; |
| u32 head, tail; |
| DMA_LOCALS; |
| DRM_DEBUG("\n"); |
| |
| BEGIN_DMA_WRAP(); |
| |
| DMA_BLOCK(MGA_DMAPAD, 0x00000000, |
| MGA_DMAPAD, 0x00000000, |
| MGA_DMAPAD, 0x00000000, MGA_DMAPAD, 0x00000000); |
| |
| ADVANCE_DMA(); |
| |
| tail = primary->tail + dev_priv->primary->offset; |
| |
| primary->tail = 0; |
| primary->last_flush = 0; |
| primary->last_wrap++; |
| |
| head = MGA_READ(MGA_PRIMADDRESS); |
| |
| if (head == dev_priv->primary->offset) |
| primary->space = primary->size; |
| else |
| primary->space = head - dev_priv->primary->offset; |
| |
| DRM_DEBUG(" head = 0x%06lx\n", (unsigned long)(head - dev_priv->primary->offset)); |
| DRM_DEBUG(" tail = 0x%06x\n", primary->tail); |
| DRM_DEBUG(" wrap = %d\n", primary->last_wrap); |
| DRM_DEBUG(" space = 0x%06x\n", primary->space); |
| |
| mga_flush_write_combine(); |
| MGA_WRITE(MGA_PRIMEND, tail | dev_priv->dma_access); |
| |
| set_bit(0, &primary->wrapped); |
| DRM_DEBUG("done.\n"); |
| } |
| |
| void mga_do_dma_wrap_end(drm_mga_private_t *dev_priv) |
| { |
| drm_mga_primary_buffer_t *primary = &dev_priv->prim; |
| drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv; |
| u32 head = dev_priv->primary->offset; |
| DRM_DEBUG("\n"); |
| |
| sarea_priv->last_wrap++; |
| DRM_DEBUG(" wrap = %d\n", sarea_priv->last_wrap); |
| |
| mga_flush_write_combine(); |
| MGA_WRITE(MGA_PRIMADDRESS, head | MGA_DMA_GENERAL); |
| |
| clear_bit(0, &primary->wrapped); |
| DRM_DEBUG("done.\n"); |
| } |
| |
| /* ================================================================ |
| * Freelist management |
| */ |
| |
| #define MGA_BUFFER_USED (~0) |
| #define MGA_BUFFER_FREE 0 |
| |
| #if MGA_FREELIST_DEBUG |
| static void mga_freelist_print(struct drm_device *dev) |
| { |
| drm_mga_private_t *dev_priv = dev->dev_private; |
| drm_mga_freelist_t *entry; |
| |
| DRM_INFO("\n"); |
| DRM_INFO("current dispatch: last=0x%x done=0x%x\n", |
| dev_priv->sarea_priv->last_dispatch, |
| (unsigned int)(MGA_READ(MGA_PRIMADDRESS) - |
| dev_priv->primary->offset)); |
| DRM_INFO("current freelist:\n"); |
| |
| for (entry = dev_priv->head->next; entry; entry = entry->next) { |
| DRM_INFO(" %p idx=%2d age=0x%x 0x%06lx\n", |
| entry, entry->buf->idx, entry->age.head, |
| (unsigned long)(entry->age.head - dev_priv->primary->offset)); |
| } |
| DRM_INFO("\n"); |
| } |
| #endif |
| |
| static int mga_freelist_init(struct drm_device *dev, drm_mga_private_t *dev_priv) |
| { |
| struct drm_device_dma *dma = dev->dma; |
| struct drm_buf *buf; |
| drm_mga_buf_priv_t *buf_priv; |
| drm_mga_freelist_t *entry; |
| int i; |
| DRM_DEBUG("count=%d\n", dma->buf_count); |
| |
| dev_priv->head = kzalloc(sizeof(drm_mga_freelist_t), GFP_KERNEL); |
| if (dev_priv->head == NULL) |
| return -ENOMEM; |
| |
| SET_AGE(&dev_priv->head->age, MGA_BUFFER_USED, 0); |
| |
| for (i = 0; i < dma->buf_count; i++) { |
| buf = dma->buflist[i]; |
| buf_priv = buf->dev_private; |
| |
| entry = kzalloc(sizeof(drm_mga_freelist_t), GFP_KERNEL); |
| if (entry == NULL) |
| return -ENOMEM; |
| |
| entry->next = dev_priv->head->next; |
| entry->prev = dev_priv->head; |
| SET_AGE(&entry->age, MGA_BUFFER_FREE, 0); |
| entry->buf = buf; |
| |
| if (dev_priv->head->next != NULL) |
| dev_priv->head->next->prev = entry; |
| if (entry->next == NULL) |
| dev_priv->tail = entry; |
| |
| buf_priv->list_entry = entry; |
| buf_priv->discard = 0; |
| buf_priv->dispatched = 0; |
| |
| dev_priv->head->next = entry; |
| } |
| |
| return 0; |
| } |
| |
| static void mga_freelist_cleanup(struct drm_device *dev) |
| { |
| drm_mga_private_t *dev_priv = dev->dev_private; |
| drm_mga_freelist_t *entry; |
| drm_mga_freelist_t *next; |
| DRM_DEBUG("\n"); |
| |
| entry = dev_priv->head; |
| while (entry) { |
| next = entry->next; |
| kfree(entry); |
| entry = next; |
| } |
| |
| dev_priv->head = dev_priv->tail = NULL; |
| } |
| |
| #if 0 |
| /* FIXME: Still needed? |
| */ |
| static void mga_freelist_reset(struct drm_device *dev) |
| { |
| struct drm_device_dma *dma = dev->dma; |
| struct drm_buf *buf; |
| drm_mga_buf_priv_t *buf_priv; |
| int i; |
| |
| for (i = 0; i < dma->buf_count; i++) { |
| buf = dma->buflist[i]; |
| buf_priv = buf->dev_private; |
| SET_AGE(&buf_priv->list_entry->age, MGA_BUFFER_FREE, 0); |
| } |
| } |
| #endif |
| |
| static struct drm_buf *mga_freelist_get(struct drm_device * dev) |
| { |
| drm_mga_private_t *dev_priv = dev->dev_private; |
| drm_mga_freelist_t *next; |
| drm_mga_freelist_t *prev; |
| drm_mga_freelist_t *tail = dev_priv->tail; |
| u32 head, wrap; |
| DRM_DEBUG("\n"); |
| |
| head = MGA_READ(MGA_PRIMADDRESS); |
| wrap = dev_priv->sarea_priv->last_wrap; |
| |
| DRM_DEBUG(" tail=0x%06lx %d\n", |
| tail->age.head ? |
| (unsigned long)(tail->age.head - dev_priv->primary->offset) : 0, |
| tail->age.wrap); |
| DRM_DEBUG(" head=0x%06lx %d\n", |
| (unsigned long)(head - dev_priv->primary->offset), wrap); |
| |
| if (TEST_AGE(&tail->age, head, wrap)) { |
| prev = dev_priv->tail->prev; |
| next = dev_priv->tail; |
| prev->next = NULL; |
| next->prev = next->next = NULL; |
| dev_priv->tail = prev; |
| SET_AGE(&next->age, MGA_BUFFER_USED, 0); |
| return next->buf; |
| } |
| |
| DRM_DEBUG("returning NULL!\n"); |
| return NULL; |
| } |
| |
| int mga_freelist_put(struct drm_device *dev, struct drm_buf *buf) |
| { |
| drm_mga_private_t *dev_priv = dev->dev_private; |
| drm_mga_buf_priv_t *buf_priv = buf->dev_private; |
| drm_mga_freelist_t *head, *entry, *prev; |
| |
| DRM_DEBUG("age=0x%06lx wrap=%d\n", |
| (unsigned long)(buf_priv->list_entry->age.head - |
| dev_priv->primary->offset), |
| buf_priv->list_entry->age.wrap); |
| |
| entry = buf_priv->list_entry; |
| head = dev_priv->head; |
| |
| if (buf_priv->list_entry->age.head == MGA_BUFFER_USED) { |
| SET_AGE(&entry->age, MGA_BUFFER_FREE, 0); |
| prev = dev_priv->tail; |
| prev->next = entry; |
| entry->prev = prev; |
| entry->next = NULL; |
| } else { |
| prev = head->next; |
| head->next = entry; |
| prev->prev = entry; |
| entry->prev = head; |
| entry->next = prev; |
| } |
| |
| return 0; |
| } |
| |
| /* ================================================================ |
| * DMA initialization, cleanup |
| */ |
| |
| int mga_driver_load(struct drm_device *dev, unsigned long flags) |
| { |
| drm_mga_private_t *dev_priv; |
| int ret; |
| |
| /* There are PCI versions of the G450. These cards have the |
| * same PCI ID as the AGP G450, but have an additional PCI-to-PCI |
| * bridge chip. We detect these cards, which are not currently |
| * supported by this driver, by looking at the device ID of the |
| * bus the "card" is on. If vendor is 0x3388 (Hint Corp) and the |
| * device is 0x0021 (HB6 Universal PCI-PCI bridge), we reject the |
| * device. |
| */ |
| if ((dev->pdev->device == 0x0525) && dev->pdev->bus->self |
| && (dev->pdev->bus->self->vendor == 0x3388) |
| && (dev->pdev->bus->self->device == 0x0021) |
| && dev->agp) { |
| /* FIXME: This should be quirked in the pci core, but oh well |
| * the hw probably stopped existing. */ |
| arch_phys_wc_del(dev->agp->agp_mtrr); |
| kfree(dev->agp); |
| dev->agp = NULL; |
| } |
| dev_priv = kzalloc(sizeof(drm_mga_private_t), GFP_KERNEL); |
| if (!dev_priv) |
| return -ENOMEM; |
| |
| dev->dev_private = (void *)dev_priv; |
| |
| dev_priv->usec_timeout = MGA_DEFAULT_USEC_TIMEOUT; |
| dev_priv->chipset = flags; |
| |
| pci_set_master(dev->pdev); |
| |
| dev_priv->mmio_base = pci_resource_start(dev->pdev, 1); |
| dev_priv->mmio_size = pci_resource_len(dev->pdev, 1); |
| |
| ret = drm_vblank_init(dev, 1); |
| |
| if (ret) { |
| (void) mga_driver_unload(dev); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| #if IS_ENABLED(CONFIG_AGP) |
| /** |
| * Bootstrap the driver for AGP DMA. |
| * |
| * \todo |
| * Investigate whether there is any benefit 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(struct drm_device *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_UCODE_SIZE; |
| 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); |
| struct drm_buf_desc req; |
| struct drm_agp_mode mode; |
| struct drm_agp_info info; |
| struct drm_agp_buffer agp_req; |
| struct drm_agp_binding 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_legacy_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_legacy_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_legacy_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_legacy_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_legacy_addbufs_agp(dev, &req); |
| if (err) { |
| DRM_ERROR("Unable to add secondary DMA buffers: %d\n", err); |
| return err; |
| } |
| |
| { |
| struct drm_map_list *_entry; |
| unsigned long agp_token = 0; |
| |
| list_for_each_entry(_entry, &dev->maplist, 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_legacy_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_legacy_ioremap(dev_priv->warp, dev); |
| drm_legacy_ioremap(dev_priv->primary, dev); |
| drm_legacy_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 -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(struct drm_device *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_legacy_addbufs_pci. |
| * |
| * \sa mga_do_dma_bootstrap, mga_do_agp_dma_bootstrap |
| */ |
| static int mga_do_pci_dma_bootstrap(struct drm_device *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_UCODE_SIZE; |
| unsigned int primary_size; |
| unsigned int bin_count; |
| int err; |
| struct drm_buf_desc req; |
| |
| if (dev->dma == NULL) { |
| DRM_ERROR("dev->dma is NULL\n"); |
| return -EFAULT; |
| } |
| |
| /* Make drm_legacy_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_legacy_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_legacy_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 -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_legacy_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(struct drm_device *dev, |
| drm_mga_dma_bootstrap_t *dma_bs) |
| { |
| const int is_agp = (dma_bs->agp_mode != 0) && dev->agp; |
| 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_legacy_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_legacy_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(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| drm_mga_dma_bootstrap_t *bootstrap = data; |
| 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; |
| |
| 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]; |
| |
| return err; |
| } |
| |
| static int mga_do_init_dma(struct drm_device *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) |
| dev_priv->clear_cmd = MGA_DWGCTL_CLEAR | MGA_ATYPE_BLK; |
| else |
| dev_priv->clear_cmd = MGA_DWGCTL_CLEAR | MGA_ATYPE_RSTR; |
| dev_priv->maccess = init->maccess; |
| |
| dev_priv->fb_cpp = init->fb_cpp; |
| dev_priv->front_offset = init->front_offset; |
| dev_priv->front_pitch = init->front_pitch; |
| dev_priv->back_offset = init->back_offset; |
| dev_priv->back_pitch = init->back_pitch; |
| |
| dev_priv->depth_cpp = init->depth_cpp; |
| dev_priv->depth_offset = init->depth_offset; |
| dev_priv->depth_pitch = init->depth_pitch; |
| |
| /* FIXME: Need to support AGP textures... |
| */ |
| dev_priv->texture_offset = init->texture_offset[0]; |
| dev_priv->texture_size = init->texture_size[0]; |
| |
| dev_priv->sarea = drm_legacy_getsarea(dev); |
| if (!dev_priv->sarea) { |
| DRM_ERROR("failed to find sarea!\n"); |
| return -EINVAL; |
| } |
| |
| if (!dev_priv->used_new_dma_init) { |
| |
| dev_priv->dma_access = MGA_PAGPXFER; |
| dev_priv->wagp_enable = MGA_WAGP_ENABLE; |
| |
| dev_priv->status = drm_legacy_findmap(dev, init->status_offset); |
| if (!dev_priv->status) { |
| DRM_ERROR("failed to find status page!\n"); |
| return -EINVAL; |
| } |
| dev_priv->mmio = drm_legacy_findmap(dev, init->mmio_offset); |
| if (!dev_priv->mmio) { |
| DRM_ERROR("failed to find mmio region!\n"); |
| return -EINVAL; |
| } |
| dev_priv->warp = drm_legacy_findmap(dev, init->warp_offset); |
| if (!dev_priv->warp) { |
| DRM_ERROR("failed to find warp microcode region!\n"); |
| return -EINVAL; |
| } |
| dev_priv->primary = drm_legacy_findmap(dev, init->primary_offset); |
| if (!dev_priv->primary) { |
| DRM_ERROR("failed to find primary dma region!\n"); |
| return -EINVAL; |
| } |
| dev->agp_buffer_token = init->buffers_offset; |
| dev->agp_buffer_map = |
| drm_legacy_findmap(dev, init->buffers_offset); |
| if (!dev->agp_buffer_map) { |
| DRM_ERROR("failed to find dma buffer region!\n"); |
| return -EINVAL; |
| } |
| |
| drm_legacy_ioremap(dev_priv->warp, dev); |
| drm_legacy_ioremap(dev_priv->primary, dev); |
| drm_legacy_ioremap(dev->agp_buffer_map, dev); |
| } |
| |
| dev_priv->sarea_priv = |
| (drm_mga_sarea_t *) ((u8 *) dev_priv->sarea->handle + |
| init->sarea_priv_offset); |
| |
| if (!dev_priv->warp->handle || |
| !dev_priv->primary->handle || |
| ((dev_priv->dma_access != 0) && |
| ((dev->agp_buffer_map == NULL) || |
| (dev->agp_buffer_map->handle == NULL)))) { |
| DRM_ERROR("failed to ioremap agp regions!\n"); |
| return -ENOMEM; |
| } |
| |
| ret = mga_warp_install_microcode(dev_priv); |
| if (ret < 0) { |
| DRM_ERROR("failed to install WARP ucode!: %d\n", ret); |
| return ret; |
| } |
| |
| ret = mga_warp_init(dev_priv); |
| if (ret < 0) { |
| DRM_ERROR("failed to init WARP engine!: %d\n", ret); |
| return ret; |
| } |
| |
| dev_priv->prim.status = (u32 *) dev_priv->status->handle; |
| |
| mga_do_wait_for_idle(dev_priv); |
| |
| /* Init the primary DMA registers. |
| */ |
| MGA_WRITE(MGA_PRIMADDRESS, dev_priv->primary->offset | MGA_DMA_GENERAL); |
| #if 0 |
| MGA_WRITE(MGA_PRIMPTR, virt_to_bus((void *)dev_priv->prim.status) | MGA_PRIMPTREN0 | /* Soft trap, SECEND, SETUPEND */ |
| MGA_PRIMPTREN1); /* DWGSYNC */ |
| #endif |
| |
| dev_priv->prim.start = (u8 *) dev_priv->primary->handle; |
| dev_priv->prim.end = ((u8 *) dev_priv->primary->handle |
| + dev_priv->primary->size); |
| dev_priv->prim.size = dev_priv->primary->size; |
| |
| dev_priv->prim.tail = 0; |
| dev_priv->prim.space = dev_priv->prim.size; |
| dev_priv->prim.wrapped = 0; |
| |
| dev_priv->prim.last_flush = 0; |
| dev_priv->prim.last_wrap = 0; |
| |
| dev_priv->prim.high_mark = 256 * DMA_BLOCK_SIZE; |
| |
| dev_priv->prim.status[0] = dev_priv->primary->offset; |
| dev_priv->prim.status[1] = 0; |
| |
| dev_priv->sarea_priv->last_wrap = 0; |
| dev_priv->sarea_priv->last_frame.head = 0; |
| dev_priv->sarea_priv->last_frame.wrap = 0; |
| |
| if (mga_freelist_init(dev, dev_priv) < 0) { |
| DRM_ERROR("could not initialize freelist\n"); |
| return -ENOMEM; |
| } |
| |
| return 0; |
| } |
| |
| static int mga_do_cleanup_dma(struct drm_device *dev, int full_cleanup) |
| { |
| int err = 0; |
| DRM_DEBUG("\n"); |
| |
| /* Make sure interrupts are disabled here because the uninstall ioctl |
| * may not have been called from userspace and after dev_private |
| * is freed, it's too late. |
| */ |
| if (dev->irq_enabled) |
| drm_irq_uninstall(dev); |
| |
| if (dev->dev_private) { |
| drm_mga_private_t *dev_priv = dev->dev_private; |
| |
| if ((dev_priv->warp != NULL) |
| && (dev_priv->warp->type != _DRM_CONSISTENT)) |
| drm_legacy_ioremapfree(dev_priv->warp, dev); |
| |
| if ((dev_priv->primary != NULL) |
| && (dev_priv->primary->type != _DRM_CONSISTENT)) |
| drm_legacy_ioremapfree(dev_priv->primary, dev); |
| |
| if (dev->agp_buffer_map != NULL) |
| drm_legacy_ioremapfree(dev->agp_buffer_map, dev); |
| |
| if (dev_priv->used_new_dma_init) { |
| #if IS_ENABLED(CONFIG_AGP) |
| if (dev_priv->agp_handle != 0) { |
| struct drm_agp_binding unbind_req; |
| struct drm_agp_buffer free_req; |
| |
| unbind_req.handle = dev_priv->agp_handle; |
| drm_agp_unbind(dev, &unbind_req); |
| |
| free_req.handle = dev_priv->agp_handle; |
| drm_agp_free(dev, &free_req); |
| |
| dev_priv->agp_textures = NULL; |
| dev_priv->agp_size = 0; |
| dev_priv->agp_handle = 0; |
| } |
| |
| if ((dev->agp != NULL) && dev->agp->acquired) |
| err = drm_agp_release(dev); |
| #endif |
| } |
| |
| dev_priv->warp = NULL; |
| dev_priv->primary = NULL; |
| dev_priv->sarea = NULL; |
| dev_priv->sarea_priv = NULL; |
| dev->agp_buffer_map = NULL; |
| |
| if (full_cleanup) { |
| dev_priv->mmio = NULL; |
| dev_priv->status = NULL; |
| dev_priv->used_new_dma_init = 0; |
| } |
| |
| memset(&dev_priv->prim, 0, sizeof(dev_priv->prim)); |
| dev_priv->warp_pipe = 0; |
| memset(dev_priv->warp_pipe_phys, 0, |
| sizeof(dev_priv->warp_pipe_phys)); |
| |
| if (dev_priv->head != NULL) |
| mga_freelist_cleanup(dev); |
| } |
| |
| return err; |
| } |
| |
| int mga_dma_init(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| drm_mga_init_t *init = data; |
| int err; |
| |
| LOCK_TEST_WITH_RETURN(dev, file_priv); |
| |
| switch (init->func) { |
| case MGA_INIT_DMA: |
| err = mga_do_init_dma(dev, init); |
| if (err) |
| (void)mga_do_cleanup_dma(dev, FULL_CLEANUP); |
| return err; |
| case MGA_CLEANUP_DMA: |
| return mga_do_cleanup_dma(dev, FULL_CLEANUP); |
| } |
| |
| return -EINVAL; |
| } |
| |
| /* ================================================================ |
| * Primary DMA stream management |
| */ |
| |
| int mga_dma_flush(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; |
| struct drm_lock *lock = data; |
| |
| LOCK_TEST_WITH_RETURN(dev, file_priv); |
| |
| DRM_DEBUG("%s%s%s\n", |
| (lock->flags & _DRM_LOCK_FLUSH) ? "flush, " : "", |
| (lock->flags & _DRM_LOCK_FLUSH_ALL) ? "flush all, " : "", |
| (lock->flags & _DRM_LOCK_QUIESCENT) ? "idle, " : ""); |
| |
| WRAP_WAIT_WITH_RETURN(dev_priv); |
| |
| if (lock->flags & (_DRM_LOCK_FLUSH | _DRM_LOCK_FLUSH_ALL)) |
| mga_do_dma_flush(dev_priv); |
| |
| if (lock->flags & _DRM_LOCK_QUIESCENT) { |
| #if MGA_DMA_DEBUG |
| int ret = mga_do_wait_for_idle(dev_priv); |
| if (ret < 0) |
| DRM_INFO("-EBUSY\n"); |
| return ret; |
| #else |
| return mga_do_wait_for_idle(dev_priv); |
| #endif |
| } else { |
| return 0; |
| } |
| } |
| |
| int mga_dma_reset(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; |
| |
| LOCK_TEST_WITH_RETURN(dev, file_priv); |
| |
| return mga_do_dma_reset(dev_priv); |
| } |
| |
| /* ================================================================ |
| * DMA buffer management |
| */ |
| |
| static int mga_dma_get_buffers(struct drm_device *dev, |
| struct drm_file *file_priv, struct drm_dma *d) |
| { |
| struct drm_buf *buf; |
| int i; |
| |
| for (i = d->granted_count; i < d->request_count; i++) { |
| buf = mga_freelist_get(dev); |
| if (!buf) |
| return -EAGAIN; |
| |
| buf->file_priv = file_priv; |
| |
| if (copy_to_user(&d->request_indices[i], |
| &buf->idx, sizeof(buf->idx))) |
| return -EFAULT; |
| if (copy_to_user(&d->request_sizes[i], |
| &buf->total, sizeof(buf->total))) |
| return -EFAULT; |
| |
| d->granted_count++; |
| } |
| return 0; |
| } |
| |
| int mga_dma_buffers(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| struct drm_device_dma *dma = dev->dma; |
| drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; |
| struct drm_dma *d = data; |
| int ret = 0; |
| |
| LOCK_TEST_WITH_RETURN(dev, file_priv); |
| |
| /* Please don't send us buffers. |
| */ |
| if (d->send_count != 0) { |
| DRM_ERROR("Process %d trying to send %d buffers via drmDMA\n", |
| task_pid_nr(current), d->send_count); |
| return -EINVAL; |
| } |
| |
| /* We'll send you buffers. |
| */ |
| if (d->request_count < 0 || d->request_count > dma->buf_count) { |
| DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n", |
| task_pid_nr(current), d->request_count, |
| dma->buf_count); |
| return -EINVAL; |
| } |
| |
| WRAP_TEST_WITH_RETURN(dev_priv); |
| |
| d->granted_count = 0; |
| |
| if (d->request_count) |
| ret = mga_dma_get_buffers(dev, file_priv, d); |
| |
| return ret; |
| } |
| |
| /** |
| * Called just before the module is unloaded. |
| */ |
| void mga_driver_unload(struct drm_device *dev) |
| { |
| kfree(dev->dev_private); |
| dev->dev_private = NULL; |
| } |
| |
| /** |
| * Called when the last opener of the device is closed. |
| */ |
| void mga_driver_lastclose(struct drm_device *dev) |
| { |
| mga_do_cleanup_dma(dev, FULL_CLEANUP); |
| } |
| |
| int mga_driver_dma_quiescent(struct drm_device *dev) |
| { |
| drm_mga_private_t *dev_priv = dev->dev_private; |
| return mga_do_wait_for_idle(dev_priv); |
| } |