ttm_agp_backend.c revision 1.3.2.2
1 1.3.2.2 tls /* $NetBSD: ttm_agp_backend.c,v 1.3.2.2 2014/08/20 00:04:22 tls Exp $ */ 2 1.3.2.2 tls 3 1.3.2.2 tls /*- 4 1.3.2.2 tls * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 1.3.2.2 tls * All rights reserved. 6 1.3.2.2 tls * 7 1.3.2.2 tls * This code is derived from software contributed to The NetBSD Foundation 8 1.3.2.2 tls * by Taylor R. Campbell. 9 1.3.2.2 tls * 10 1.3.2.2 tls * Redistribution and use in source and binary forms, with or without 11 1.3.2.2 tls * modification, are permitted provided that the following conditions 12 1.3.2.2 tls * are met: 13 1.3.2.2 tls * 1. Redistributions of source code must retain the above copyright 14 1.3.2.2 tls * notice, this list of conditions and the following disclaimer. 15 1.3.2.2 tls * 2. Redistributions in binary form must reproduce the above copyright 16 1.3.2.2 tls * notice, this list of conditions and the following disclaimer in the 17 1.3.2.2 tls * documentation and/or other materials provided with the distribution. 18 1.3.2.2 tls * 19 1.3.2.2 tls * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.3.2.2 tls * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.3.2.2 tls * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.3.2.2 tls * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.3.2.2 tls * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.3.2.2 tls * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.3.2.2 tls * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.3.2.2 tls * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.3.2.2 tls * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.3.2.2 tls * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.3.2.2 tls * POSSIBILITY OF SUCH DAMAGE. 30 1.3.2.2 tls */ 31 1.3.2.2 tls 32 1.3.2.2 tls #include <sys/cdefs.h> 33 1.3.2.2 tls __KERNEL_RCSID(0, "$NetBSD: ttm_agp_backend.c,v 1.3.2.2 2014/08/20 00:04:22 tls Exp $"); 34 1.3.2.2 tls 35 1.3.2.2 tls #include <sys/types.h> 36 1.3.2.2 tls #include <sys/kmem.h> 37 1.3.2.2 tls 38 1.3.2.2 tls #include <dev/pci/pcireg.h> 39 1.3.2.2 tls #include <dev/pci/pcivar.h> 40 1.3.2.2 tls #include <dev/pci/agpvar.h> 41 1.3.2.2 tls 42 1.3.2.2 tls #include <ttm/ttm_bo_driver.h> 43 1.3.2.2 tls #include <ttm/ttm_page_alloc.h> 44 1.3.2.2 tls 45 1.3.2.2 tls struct ttm_agp { 46 1.3.2.2 tls struct ttm_dma_tt ttm_dma; 47 1.3.2.2 tls struct agp_softc *agp; 48 1.3.2.2 tls unsigned long agp_pgno; 49 1.3.2.2 tls bool bound; 50 1.3.2.2 tls }; 51 1.3.2.2 tls 52 1.3.2.2 tls static const struct ttm_backend_func ttm_agp_backend_func; 53 1.3.2.2 tls 54 1.3.2.2 tls struct ttm_tt * 55 1.3.2.2 tls ttm_agp_tt_create(struct ttm_bo_device *bdev, struct agp_bridge_data *bridge, 56 1.3.2.2 tls unsigned long size, uint32_t page_flags, struct page *dummy_read_page) 57 1.3.2.2 tls { 58 1.3.2.2 tls struct ttm_agp *ttm_agp; 59 1.3.2.2 tls 60 1.3.2.2 tls ttm_agp = kmem_alloc(sizeof(*ttm_agp), KM_SLEEP); 61 1.3.2.2 tls ttm_agp->agp = &bridge->abd_sc; 62 1.3.2.2 tls ttm_agp->ttm_dma.ttm.func = &ttm_agp_backend_func; 63 1.3.2.2 tls 64 1.3.2.2 tls if (ttm_tt_init(&ttm_agp->ttm_dma.ttm, bdev, size, page_flags, 65 1.3.2.2 tls dummy_read_page) != 0) 66 1.3.2.2 tls goto fail; 67 1.3.2.2 tls 68 1.3.2.2 tls /* Success! */ 69 1.3.2.2 tls return &ttm_agp->ttm_dma.ttm; 70 1.3.2.2 tls 71 1.3.2.2 tls fail: kmem_free(ttm_agp, sizeof(*ttm_agp)); 72 1.3.2.2 tls return NULL; 73 1.3.2.2 tls } 74 1.3.2.2 tls 75 1.3.2.2 tls int 76 1.3.2.2 tls ttm_agp_tt_populate(struct ttm_tt *ttm) 77 1.3.2.2 tls { 78 1.3.2.2 tls 79 1.3.2.2 tls if (ttm->state != tt_unpopulated) 80 1.3.2.2 tls return 0; 81 1.3.2.2 tls 82 1.3.2.2 tls return ttm_bus_dma_populate(container_of(ttm, struct ttm_dma_tt, ttm)); 83 1.3.2.2 tls } 84 1.3.2.2 tls 85 1.3.2.2 tls void 86 1.3.2.2 tls ttm_agp_tt_unpopulate(struct ttm_tt *ttm) 87 1.3.2.2 tls { 88 1.3.2.2 tls 89 1.3.2.2 tls ttm_bus_dma_unpopulate(container_of(ttm, struct ttm_dma_tt, ttm)); 90 1.3.2.2 tls } 91 1.3.2.2 tls 92 1.3.2.2 tls static int 93 1.3.2.2 tls ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem) 94 1.3.2.2 tls { 95 1.3.2.2 tls struct ttm_agp *const ttm_agp = container_of(ttm, struct ttm_agp, 96 1.3.2.2 tls ttm_dma.ttm); 97 1.3.2.2 tls struct agp_softc *const sc = ttm_agp->agp; 98 1.3.2.2 tls struct drm_mm_node *const node = bo_mem->mm_node; 99 1.3.2.2 tls const unsigned long agp_pgno = node->start; 100 1.3.2.2 tls unsigned i, j; 101 1.3.2.2 tls int ret; 102 1.3.2.2 tls 103 1.3.2.2 tls KASSERT(!ttm_agp->bound); 104 1.3.2.2 tls KASSERT(ttm_agp->ttm_dma.dma_address->dm_nsegs == ttm->num_pages); 105 1.3.2.2 tls for (i = 0; i < ttm->num_pages; i++) { 106 1.3.2.2 tls KASSERT(ttm_agp->ttm_dma.dma_address->dm_segs[i].ds_len == 107 1.3.2.2 tls AGP_PAGE_SIZE); 108 1.3.2.2 tls /* XXX errno NetBSD->Linux */ 109 1.3.2.2 tls ret = -AGP_BIND_PAGE(sc, (agp_pgno + i) << AGP_PAGE_SHIFT, 110 1.3.2.2 tls ttm_agp->ttm_dma.dma_address->dm_segs[i].ds_len); 111 1.3.2.2 tls if (ret) 112 1.3.2.2 tls goto fail; 113 1.3.2.2 tls } 114 1.3.2.2 tls agp_flush_cache(); 115 1.3.2.2 tls AGP_FLUSH_TLB(sc); 116 1.3.2.2 tls 117 1.3.2.2 tls /* Success! */ 118 1.3.2.2 tls ttm_agp->agp_pgno = agp_pgno; 119 1.3.2.2 tls ttm_agp->bound = true; 120 1.3.2.2 tls return 0; 121 1.3.2.2 tls 122 1.3.2.2 tls fail: KASSERT(ret); 123 1.3.2.2 tls for (j = 0; j < i; j++) 124 1.3.2.2 tls (void)AGP_UNBIND_PAGE(sc, (agp_pgno + j) << AGP_PAGE_SHIFT); 125 1.3.2.2 tls return ret; 126 1.3.2.2 tls } 127 1.3.2.2 tls 128 1.3.2.2 tls static int 129 1.3.2.2 tls ttm_agp_unbind(struct ttm_tt *ttm) 130 1.3.2.2 tls { 131 1.3.2.2 tls struct ttm_agp *const ttm_agp = container_of(ttm, struct ttm_agp, 132 1.3.2.2 tls ttm_dma.ttm); 133 1.3.2.2 tls struct agp_softc *const sc = ttm_agp->agp; 134 1.3.2.2 tls const unsigned long agp_pgno = ttm_agp->agp_pgno; 135 1.3.2.2 tls unsigned i; 136 1.3.2.2 tls 137 1.3.2.2 tls /* XXX Can this happen? */ 138 1.3.2.2 tls if (!ttm_agp->bound) 139 1.3.2.2 tls return 0; 140 1.3.2.2 tls 141 1.3.2.2 tls for (i = 0; i < ttm->num_pages; i++) 142 1.3.2.2 tls (void)AGP_UNBIND_PAGE(sc, (agp_pgno + i) << AGP_PAGE_SHIFT); 143 1.3.2.2 tls 144 1.3.2.2 tls ttm_agp->agp_pgno = 0; 145 1.3.2.2 tls ttm_agp->bound = false; 146 1.3.2.2 tls return 0; 147 1.3.2.2 tls } 148 1.3.2.2 tls 149 1.3.2.2 tls static void 150 1.3.2.2 tls ttm_agp_destroy(struct ttm_tt *ttm) 151 1.3.2.2 tls { 152 1.3.2.2 tls struct ttm_agp *const ttm_agp = container_of(ttm, struct ttm_agp, 153 1.3.2.2 tls ttm_dma.ttm); 154 1.3.2.2 tls 155 1.3.2.2 tls /* XXX Can this happen? */ 156 1.3.2.2 tls if (ttm_agp->bound) 157 1.3.2.2 tls ttm_agp_unbind(ttm); 158 1.3.2.2 tls ttm_tt_fini(ttm); 159 1.3.2.2 tls kmem_free(ttm, sizeof(*ttm)); 160 1.3.2.2 tls } 161 1.3.2.2 tls 162 1.3.2.2 tls static const struct ttm_backend_func ttm_agp_backend_func = { 163 1.3.2.2 tls .bind = &ttm_agp_bind, 164 1.3.2.2 tls .unbind = &ttm_agp_unbind, 165 1.3.2.2 tls .destroy = &ttm_agp_destroy, 166 1.3.2.2 tls }; 167
Indexes created Wed Oct 01 15:09:59 GMT 2025