diff options
Diffstat (limited to 'nx-X11/extras/drm/bsd-core/drm_pci.c')
| -rw-r--r-- | nx-X11/extras/drm/bsd-core/drm_pci.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/nx-X11/extras/drm/bsd-core/drm_pci.c b/nx-X11/extras/drm/bsd-core/drm_pci.c new file mode 100644 index 000000000..a33f5f9cf --- /dev/null +++ b/nx-X11/extras/drm/bsd-core/drm_pci.c @@ -0,0 +1,141 @@ +/** + * \file drm_pci.h + * \brief PCI consistent, DMA-accessible memory functions. + * + * \author Eric Anholt <anholt@FreeBSD.org> + */ + +/*- + * Copyright 2003 Eric Anholt. + * 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 THE + * AUTHOR 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. + */ + +#include "drmP.h" + +/**********************************************************************/ +/** \name PCI memory */ +/*@{*/ + +#if defined(__FreeBSD__) +static void +drm_pci_busdma_callback(void *arg, bus_dma_segment_t *segs, int nsegs, int error) +{ + drm_dma_handle_t *dmah = arg; + + if (error != 0) + return; + + KASSERT(nsegs == 1, ("drm_pci_busdma_callback: bad dma segment count")); + dmah->busaddr = segs[0].ds_addr; +} +#endif + +/** + * \brief Allocate a physically contiguous DMA-accessible consistent + * memory block. + */ +drm_dma_handle_t * +drm_pci_alloc(drm_device_t *dev, size_t size, size_t align, dma_addr_t maxaddr) +{ + drm_dma_handle_t *dmah; + int ret; + + /* Need power-of-two alignment, so fail the allocation if it isn't. */ + if ((align & (align - 1)) != 0) { + DRM_ERROR("drm_pci_alloc with non-power-of-two alignment %d\n", + (int)align); + return NULL; + } + + dmah = malloc(sizeof(drm_dma_handle_t), M_DRM, M_ZERO | M_NOWAIT); + if (dmah == NULL) + return NULL; + +#ifdef __FreeBSD__ + ret = bus_dma_tag_create(NULL, align, 0, /* tag, align, boundary */ + maxaddr, BUS_SPACE_MAXADDR, /* lowaddr, highaddr */ + NULL, NULL, /* filtfunc, filtfuncargs */ + size, 1, size, /* maxsize, nsegs, maxsegsize */ + BUS_DMA_ALLOCNOW, NULL, NULL, /* flags, lockfunc, lockfuncargs */ + &dmah->tag); + if (ret != 0) { + free(dmah, M_DRM); + return NULL; + } + + ret = bus_dmamem_alloc(dmah->tag, &dmah->vaddr, BUS_DMA_NOWAIT, + &dmah->map); + if (ret != 0) { + bus_dma_tag_destroy(dmah->tag); + free(dmah, M_DRM); + return NULL; + } + + ret = bus_dmamap_load(dmah->tag, dmah->map, dmah->vaddr, size, + drm_pci_busdma_callback, dmah, 0); + if (ret != 0) { + bus_dmamem_free(dmah->tag, dmah->vaddr, dmah->map); + bus_dma_tag_destroy(dmah->tag); + free(dmah, M_DRM); + return NULL; + } +#elif defined(__NetBSD__) + ret = bus_dmamem_alloc(dev->dma_tag, size, align, PAGE_SIZE, + &dmah->seg, 1, &nsegs, BUS_DMA_NOWAIT); + if ((ret != 0) || (nsegs != 1)) { + free(dmah, M_DRM); + return NULL; + } + + ret = bus_dmamem_map(dev->dma_tag, &dmah->seg, 1, size, &dmah->addr, + BUS_DMA_NOWAIT); + if (ret != 0) { + bus_dmamem_free(dev->dma_tag, &dmah->seg, 1); + free(dmah, M_DRM); + return NULL; + } + + dmah->dmaaddr = h->seg.ds_addr; +#endif + + return dmah; +} + +/** + * \brief Free a DMA-accessible consistent memory block. + */ +void +drm_pci_free(drm_device_t *dev, drm_dma_handle_t *dmah) +{ + if (dmah == NULL) + return; + +#if defined(__FreeBSD__) + bus_dmamem_free(dmah->tag, dmah->vaddr, dmah->map); + bus_dma_tag_destroy(dmah->tag); +#elif defined(__NetBSD__) + bus_dmamem_free(dev->dma_tag, &dmah->seg, 1); +#endif + + free(dmah, M_DRM); +} + +/*@}*/ |