diff options
Diffstat (limited to 'drivers/gpu/drm/mga/mga_dma.c')
| -rw-r--r-- | drivers/gpu/drm/mga/mga_dma.c | 1167 |
1 files changed, 1167 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mga/mga_dma.c b/drivers/gpu/drm/mga/mga_dma.c new file mode 100644 index 000000000..85c74364c --- /dev/null +++ b/drivers/gpu/drm/mga/mga_dma.c @@ -0,0 +1,1167 @@ +/* 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); +} |