3e6eb1349a
ati pci gart to use bus_dma to handle the allocations. This fixes a garbled screen issue on at least some radeons (X1400 tested). It is also likely that this is the correct fix for PR# 119324, though that is not confirmed yet. Reviewed by: jhb@ (mentor, prior version) Approved by: kib@ MFC after: 2 weeks
193 lines
5.0 KiB
C
193 lines
5.0 KiB
C
/*-
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Gareth Hughes <gareth@valinux.com>
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* Eric Anholt <anholt@FreeBSD.org>
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/** @file drm_scatter.c
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* Allocation of memory for scatter-gather mappings by the graphics chip.
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*
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* The memory allocated here is then made into an aperture in the card
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* by drm_ati_pcigart_init().
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*/
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#include "dev/drm/drmP.h"
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static void drm_sg_alloc_cb(void *arg, bus_dma_segment_t *segs,
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int nsegs, int error);
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int
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drm_sg_alloc(struct drm_device *dev, struct drm_scatter_gather *request)
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{
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struct drm_sg_mem *entry;
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struct drm_dma_handle *dmah;
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unsigned long pages;
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int ret;
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if (dev->sg)
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return EINVAL;
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entry = malloc(sizeof(*entry), DRM_MEM_SGLISTS, M_WAITOK | M_ZERO);
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if (!entry)
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return ENOMEM;
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pages = round_page(request->size) / PAGE_SIZE;
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DRM_DEBUG("sg size=%ld pages=%ld\n", request->size, pages);
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entry->pages = pages;
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entry->busaddr = malloc(pages * sizeof(*entry->busaddr), DRM_MEM_PAGES,
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M_WAITOK | M_ZERO);
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if (!entry->busaddr) {
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free(entry, DRM_MEM_SGLISTS);
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return ENOMEM;
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}
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dmah = malloc(sizeof(struct drm_dma_handle), DRM_MEM_DMA,
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M_ZERO | M_NOWAIT);
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if (dmah == NULL) {
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free(entry->busaddr, DRM_MEM_PAGES);
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free(entry, DRM_MEM_SGLISTS);
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return ENOMEM;
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}
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ret = bus_dma_tag_create(NULL, PAGE_SIZE, 0, /* tag, align, boundary */
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BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, /* lowaddr, highaddr */
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NULL, NULL, /* filtfunc, filtfuncargs */
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request->size, pages, /* maxsize, nsegs */
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PAGE_SIZE, 0, /* maxsegsize, flags */
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NULL, NULL, /* lockfunc, lockfuncargs */
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&dmah->tag);
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if (ret != 0) {
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free(dmah, DRM_MEM_DMA);
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free(entry->busaddr, DRM_MEM_PAGES);
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free(entry, DRM_MEM_SGLISTS);
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return ENOMEM;
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}
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ret = bus_dmamem_alloc(dmah->tag, &dmah->vaddr,
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BUS_DMA_NOWAIT | BUS_DMA_ZERO | BUS_DMA_NOCACHE, &dmah->map);
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if (ret != 0) {
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bus_dma_tag_destroy(dmah->tag);
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free(dmah, DRM_MEM_DMA);
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free(entry->busaddr, DRM_MEM_PAGES);
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free(entry, DRM_MEM_SGLISTS);
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return ENOMEM;
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}
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ret = bus_dmamap_load(dmah->tag, dmah->map, dmah->vaddr,
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request->size, drm_sg_alloc_cb, entry, 0);
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if (ret != 0) {
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bus_dmamem_free(dmah->tag, dmah->vaddr, dmah->map);
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bus_dma_tag_destroy(dmah->tag);
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free(dmah, DRM_MEM_DMA);
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free(entry->busaddr, DRM_MEM_PAGES);
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free(entry, DRM_MEM_SGLISTS);
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return ENOMEM;
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}
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entry->sg_dmah = dmah;
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entry->handle = (unsigned long)dmah->vaddr;
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DRM_DEBUG("sg alloc handle = %08lx\n", entry->handle);
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entry->virtual = (void *)entry->handle;
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request->handle = entry->handle;
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DRM_LOCK();
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if (dev->sg) {
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DRM_UNLOCK();
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drm_sg_cleanup(entry);
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return EINVAL;
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}
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dev->sg = entry;
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DRM_UNLOCK();
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return 0;
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}
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static void
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drm_sg_alloc_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
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{
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struct drm_sg_mem *entry = arg;
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int i;
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if (error != 0)
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return;
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for(i = 0 ; i < nsegs ; i++) {
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entry->busaddr[i] = segs[i].ds_addr;
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}
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}
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int
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drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_scatter_gather *request = data;
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DRM_DEBUG("\n");
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return drm_sg_alloc(dev, request);
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}
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void
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drm_sg_cleanup(struct drm_sg_mem *entry)
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{
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struct drm_dma_handle *dmah = entry->sg_dmah;
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bus_dmamap_unload(dmah->tag, dmah->map);
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bus_dmamem_free(dmah->tag, dmah->vaddr, dmah->map);
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bus_dma_tag_destroy(dmah->tag);
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free(dmah, DRM_MEM_DMA);
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free(entry->busaddr, DRM_MEM_PAGES);
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free(entry, DRM_MEM_SGLISTS);
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}
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int
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drm_sg_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
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{
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struct drm_scatter_gather *request = data;
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struct drm_sg_mem *entry;
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DRM_LOCK();
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entry = dev->sg;
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dev->sg = NULL;
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DRM_UNLOCK();
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if (!entry || entry->handle != request->handle)
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return EINVAL;
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DRM_DEBUG("sg free virtual = 0x%lx\n", entry->handle);
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drm_sg_cleanup(entry);
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return 0;
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}
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