455fa6518a
This update brings few features:
o Support for the setmaster/dropmaster ioctls. For instance, they
are used to run multiple X servers simultaneously.
o Support for minor devices. The only user-visible change is a new
entry in /dev/dri but it is useless at the moment. This is a
first step to support render nodes [1].
The main benefit is to greatly reduce the diff with Linux (at the
expense of an unreadable commit diff). Hopefully, next upgrades will be
easier.
No updates were made to the drivers, beside adapting them to API
changes.
[1] https://en.wikipedia.org/wiki/Direct_Rendering_Manager#Render_nodes
Tested by: Many people
MFC after: 1 month
Relnotes: yes
137 lines
3.6 KiB
C
137 lines
3.6 KiB
C
/*-
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* Copyright (c) 2009 Robert C. Noland III <rnoland@FreeBSD.org>
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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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#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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* The memory allocated here is then made into an aperture in the card
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* by mapping the pages into the GART.
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*/
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#include <dev/drm2/drmP.h>
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#define DEBUG_SCATTER 0
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static inline vm_offset_t drm_vmalloc_dma(vm_size_t size)
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{
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return kmem_alloc_attr(kernel_arena, size, M_NOWAIT | M_ZERO,
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0, BUS_SPACE_MAXADDR_32BIT, VM_MEMATTR_WRITE_COMBINING);
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}
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void drm_sg_cleanup(struct drm_sg_mem * entry)
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{
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if (entry == NULL)
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return;
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if (entry->vaddr != 0)
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kmem_free(kernel_arena, entry->vaddr, IDX_TO_OFF(entry->pages));
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free(entry->busaddr, DRM_MEM_SGLISTS);
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free(entry, DRM_MEM_DRIVER);
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}
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int 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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vm_size_t size;
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vm_pindex_t pindex;
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DRM_DEBUG("\n");
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if (!drm_core_check_feature(dev, DRIVER_SG))
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return -EINVAL;
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if (dev->sg)
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return -EINVAL;
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entry = malloc(sizeof(*entry), DRM_MEM_DRIVER, M_NOWAIT | M_ZERO);
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if (!entry)
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return -ENOMEM;
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DRM_DEBUG("request size=%ld\n", request->size);
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size = round_page(request->size);
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entry->pages = OFF_TO_IDX(size);
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entry->busaddr = malloc(entry->pages * sizeof(*entry->busaddr),
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DRM_MEM_SGLISTS, M_NOWAIT | M_ZERO);
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if (!entry->busaddr) {
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free(entry, DRM_MEM_DRIVER);
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return -ENOMEM;
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}
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entry->vaddr = drm_vmalloc_dma(size);
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if (entry->vaddr == 0) {
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free(entry->busaddr, DRM_MEM_DRIVER);
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free(entry, DRM_MEM_DRIVER);
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return -ENOMEM;
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}
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for (pindex = 0; pindex < entry->pages; pindex++) {
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entry->busaddr[pindex] =
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vtophys(entry->vaddr + IDX_TO_OFF(pindex));
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}
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request->handle = entry->vaddr;
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dev->sg = entry;
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DRM_DEBUG("allocated %ju pages @ 0x%08zx, contents=%08lx\n",
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entry->pages, entry->vaddr, *(unsigned long *)entry->vaddr);
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return 0;
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}
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int 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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return drm_sg_alloc(dev, request);
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}
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int drm_sg_free(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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struct drm_sg_mem *entry;
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if (!drm_core_check_feature(dev, DRIVER_SG))
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return -EINVAL;
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entry = dev->sg;
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dev->sg = NULL;
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if (!entry || entry->vaddr != request->handle)
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return -EINVAL;
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DRM_DEBUG("free 0x%zx\n", entry->vaddr);
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drm_sg_cleanup(entry);
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return 0;
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}
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