drm_scatter.c revision 1450
1450N/A/*
1450N/A * Copyright (c) 2006, 2015, Oracle and/or its affiliates. All rights reserved.
1450N/A */
1450N/A
1450N/A/* drm_scatter.h -- IOCTLs to manage scatter/gather memory -*- linux-c -*-
1450N/A * Created: Mon Dec 18 23:20:54 2000 by gareth@valinux.com */
1450N/A/*-
1450N/A * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
1450N/A * All Rights Reserved.
1450N/A *
1450N/A * Permission is hereby granted, free of charge, to any person obtaining a
1450N/A * copy of this software and associated documentation files (the "Software"),
1450N/A * to deal in the Software without restriction, including without limitation
1450N/A * the rights to use, copy, modify, merge, publish, distribute, sublicense,
1450N/A * and/or sell copies of the Software, and to permit persons to whom the
1450N/A * Software is furnished to do so, subject to the following conditions:
1450N/A *
1450N/A * The above copyright notice and this permission notice (including the next
1450N/A * paragraph) shall be included in all copies or substantial portions of the
1450N/A * Software.
1450N/A *
1450N/A * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
1450N/A * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
1450N/A * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
1450N/A * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
1450N/A * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
1450N/A * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
1450N/A * DEALINGS IN THE SOFTWARE.
1450N/A *
1450N/A * Authors:
1450N/A * Gareth Hughes <gareth@valinux.com>
1450N/A * Eric Anholt <anholt@FreeBSD.org>
1450N/A *
1450N/A */
1450N/A
1450N/A#include "drmP.h"
1450N/A#ifdef __x86
1450N/A#include <gfx_private.h>
1450N/A#endif
1450N/A#include "drm_io32.h"
1450N/A
1450N/A#define DEBUG_SCATTER 0
1450N/A
1450N/A#ifdef _LP64
1450N/A#define ScatterHandle(x) (unsigned int)((x >> 32) + (x & ((1L << 32) - 1)))
1450N/A#else
1450N/A#define ScatterHandle(x) (unsigned int)(x)
1450N/A#endif
1450N/A
1450N/Avoid
1450N/Adrm_sg_cleanup(drm_device_t *dev, drm_sg_mem_t *entry)
1450N/A{
1450N/A int pages = entry->pages;
1450N/A
1450N/A if (entry->busaddr) {
1450N/A kmem_free(entry->busaddr, sizeof (*entry->busaddr) * pages);
1450N/A entry->busaddr = NULL;
1450N/A }
1450N/A
1450N/A ASSERT(entry->umem_cookie == NULL);
1450N/A
1450N/A if (entry->dmah_sg) {
1450N/A drm_pci_free(dev, entry->dmah_sg);
1450N/A entry->dmah_sg = NULL;
1450N/A }
1450N/A
1450N/A if (entry->dmah_gart) {
1450N/A drm_pci_free(dev, entry->dmah_gart);
1450N/A entry->dmah_gart = NULL;
1450N/A }
1450N/A
1450N/A if (entry) {
1450N/A drm_free(entry, sizeof (drm_sg_mem_t), DRM_MEM_SGLISTS);
1450N/A entry = NULL;
1450N/A }
1450N/A}
1450N/A
1450N/A/*ARGSUSED*/
1450N/Aint
1450N/Adrm_sg_alloc(DRM_IOCTL_ARGS)
1450N/A{
1450N/A DRM_DEVICE;
1450N/A unsigned long pages;
1450N/A drm_sg_mem_t *entry;
1450N/A drm_dma_handle_t *dmah;
1450N/A drm_scatter_gather_t request;
1450N/A
1450N/A DRM_DEBUG("%s\n", "drm_sg_alloc");
1450N/A
1450N/A if (dev->sg)
1450N/A return (EINVAL);
1450N/A
1450N/A#ifdef _MULTI_DATAMODEL
1450N/A if (ddi_model_convert_from(mode & FMODELS) == DDI_MODEL_ILP32) {
1450N/A drm_scatter_gather_32_t request32;
1450N/A
1450N/A DRM_COPYFROM_WITH_RETURN(&request32, (void *)data,
1450N/A sizeof (request32));
1450N/A request.size = request32.size;
1450N/A request.handle = request32.handle;
1450N/A } else
1450N/A#endif
1450N/A DRM_COPYFROM_WITH_RETURN(&request, (void *)data,
1450N/A sizeof (request));
1450N/A
1450N/A pages = btopr(request.size);
1450N/A DRM_DEBUG("sg size=%ld pages=%ld\n", request.size, pages);
1450N/A entry = kmem_zalloc(sizeof (*entry), KM_SLEEP);
1450N/A entry->pages = (int)pages;
1450N/A dmah = drm_pci_alloc(dev, ptob(pages), 4096, 0xfffffffful, pages);
1450N/A if (dmah == NULL)
1450N/A goto err_exit;
1450N/A entry->busaddr = (void *)kmem_zalloc(sizeof (*entry->busaddr) *
1450N/A pages, KM_SLEEP);
1450N/A
1450N/A entry->handle = ScatterHandle((unsigned long)dmah->vaddr);
1450N/A entry->virtual = (void *)dmah->vaddr;
1450N/A request.handle = entry->handle;
1450N/A entry->dmah_sg = dmah;
1450N/A#ifdef _MULTI_DATAMODEL
1450N/A if (ddi_model_convert_from(mode & FMODELS) == DDI_MODEL_ILP32) {
1450N/A drm_scatter_gather_32_t data32;
1450N/A
1450N/A data32.size = (uint32_t)request.size;
1450N/A data32.handle = (uint32_t)request.handle;
1450N/A
1450N/A DRM_COPYTO_WITH_RETURN((void *)data, &data32,
1450N/A sizeof (data32));
1450N/A } else
1450N/A#endif
1450N/A DRM_COPYTO_WITH_RETURN((void *)data, &request,
1450N/A sizeof (request));
1450N/A
1450N/A DRM_LOCK();
1450N/A if (dev->sg) {
1450N/A DRM_UNLOCK();
1450N/A drm_sg_cleanup(dev, entry);
1450N/A return (EINVAL);
1450N/A }
1450N/A dev->sg = entry;
1450N/A DRM_UNLOCK();
1450N/A
1450N/A return (0);
1450N/A
1450N/Aerr_exit:
1450N/A drm_sg_cleanup(dev, entry);
1450N/A return (ENOMEM);
1450N/A}
1450N/A
1450N/A/*ARGSUSED*/
1450N/Aint
1450N/Adrm_sg_free(DRM_IOCTL_ARGS)
1450N/A{
1450N/A DRM_DEVICE;
1450N/A drm_scatter_gather_t request;
1450N/A drm_sg_mem_t *entry;
1450N/A
1450N/A#ifdef _MULTI_DATAMODEL
1450N/A if (ddi_model_convert_from(mode & FMODELS) == DDI_MODEL_ILP32) {
1450N/A drm_scatter_gather_32_t request32;
1450N/A
1450N/A DRM_COPYFROM_WITH_RETURN(&request32, (void *)data,
1450N/A sizeof (request32));
1450N/A request.size = request32.size;
1450N/A request.handle = request32.handle;
1450N/A } else
1450N/A#endif
1450N/A DRM_COPYFROM_WITH_RETURN(&request, (void *)data,
1450N/A sizeof (request));
1450N/A
1450N/A DRM_LOCK();
1450N/A entry = dev->sg;
1450N/A dev->sg = NULL;
1450N/A DRM_UNLOCK();
1450N/A
1450N/A if (!entry || entry->handle != request.handle)
1450N/A return (EINVAL);
1450N/A
1450N/A drm_sg_cleanup(dev, entry);
1450N/A
1450N/A return (0);
1450N/A}