1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <sys/debug.h>
30 #include <sys/types.h>
31 #include <sys/param.h>
32 #include <sys/time.h>
33 #include <sys/buf.h>
34 #include <sys/errno.h>
35 #include <sys/systm.h>
36 #include <sys/conf.h>
37 #include <sys/signal.h>
38 #include <vm/page.h>
39 #include <vm/as.h>
40 #include <vm/hat.h>
41 #include <vm/seg.h>
42 #include <vm/seg_dev.h>
43 #include <vm/hat_i86.h>
44 #include <sys/ddi.h>
45 #include <sys/devops.h>
46 #include <sys/sunddi.h>
47 #include <sys/ddi_impldefs.h>
48 #include <sys/fs/snode.h>
49 #include <sys/pci.h>
50 #include <sys/vmsystm.h>
51 #include <sys/int_fmtio.h>
52 #include "gfx_private.h"
53
54 #ifdef __xpv
55 #include <sys/hypervisor.h>
56 #endif
57
58 /*
59 * Create a dummy ddi_umem_cookie given to gfxp_devmap_umem_setup().
60 */
61 ddi_umem_cookie_t
62 gfxp_umem_cookie_init(caddr_t kva, size_t size)
63 {
64 struct ddi_umem_cookie *umem_cookie;
65
66 umem_cookie = kmem_zalloc(sizeof (struct ddi_umem_cookie), KM_SLEEP);
67
68 if (umem_cookie == NULL)
69 return (NULL);
70
71 umem_cookie->cvaddr = kva;
72 umem_cookie->type = KMEM_NON_PAGEABLE;
73 umem_cookie->size = size;
74
75 return ((ddi_umem_cookie_t *)umem_cookie);
76 }
77
78 void
79 gfxp_umem_cookie_destroy(ddi_umem_cookie_t cookie)
80 {
81 kmem_free(cookie, sizeof (struct ddi_umem_cookie));
82 }
83
84 /*
85 * called by driver devmap routine to pass kernel virtual address mapping
86 * info to the framework.
87 */
88 /*ARGSUSED*/
89 int
90 gfxp_devmap_umem_setup(devmap_cookie_t dhc, dev_info_t *dip,
91 struct devmap_callback_ctl *callbackops, ddi_umem_cookie_t cookie,
92 offset_t off, size_t len, uint_t maxprot, uint_t flags,
93 ddi_device_acc_attr_t *accattrp)
94 {
95 uint_t l_flags = flags & ~IOMEM_DATA_MASK; /* clear cache attrs */
96 int e;
97
98 /*
99 * Set an appropriate attribute from devacc_attr_dataorder
100 * to keep compatibility. The cache attributes are igonred
101 * if specified.
102 */
103 if (accattrp != NULL) {
104 if (accattrp->devacc_attr_dataorder == DDI_STRICTORDER_ACC) {
105 l_flags |= IOMEM_DATA_UNCACHED;
106 } else if (accattrp->devacc_attr_dataorder ==
107 DDI_MERGING_OK_ACC) {
108 l_flags |= IOMEM_DATA_UC_WR_COMBINE;
109 } else {
110 l_flags |= IOMEM_DATA_CACHED;
111 }
112 }
113
114 e = devmap_umem_setup(dhc, dip, callbackops, cookie, off, len, maxprot,
115 l_flags, accattrp);
116 return (e);
117 }
118
119 /*
120 * Replacement for devmap_devmem_setup() which will map a machine address
121 * instead of a register set/offset.
122 */
123 void
124 gfxp_map_devmem(devmap_cookie_t dhc, gfx_maddr_t maddr, size_t length,
125 ddi_device_acc_attr_t *attrp)
126 {
127 devmap_handle_t *dhp = (devmap_handle_t *)dhc;
128 pfn_t pfn;
129
130
131 #ifdef __xpv
132 ASSERT(DOMAIN_IS_INITDOMAIN(xen_info));
133 pfn = xen_assign_pfn(mmu_btop(maddr));
134 #else
135 pfn = mmu_btop(maddr);
136 #endif
137
138 dhp->dh_pfn = pfn;
139 dhp->dh_len = mmu_ptob(mmu_btopr(length));
140 dhp->dh_roff = 0;
141
142 #ifndef DEVMAP_DEVMEM_COOKIE
143 #define DEVMAP_DEVMEM_COOKIE ((ddi_umem_cookie_t)0x1) /* XXPV */
144 #endif /* DEVMAP_DEVMEM_COOKIE */
145 dhp->dh_cookie = DEVMAP_DEVMEM_COOKIE;
146 /*LINTED: E_EXPR_NULL_EFFECT*/
147 dhp->dh_flags |= DEVMAP_DEFAULTS;
148 dhp->dh_maxprot = PROT_ALL & dhp->dh_orig_maxprot;
149
150 /* no callbacks needed */
151 bzero(&dhp->dh_callbackops, sizeof (struct devmap_callback_ctl));
152
153 switch (attrp->devacc_attr_dataorder) {
154 case DDI_UNORDERED_OK_ACC:
155 dhp->dh_hat_attr = HAT_UNORDERED_OK;
156 break;
157 case DDI_MERGING_OK_ACC:
158 dhp->dh_hat_attr = HAT_MERGING_OK;
159 break;
160 case DDI_LOADCACHING_OK_ACC:
161 dhp->dh_hat_attr = HAT_LOADCACHING_OK;
162 break;
163 case DDI_STORECACHING_OK_ACC:
164 dhp->dh_hat_attr = HAT_STORECACHING_OK;
165 break;
166 case DDI_STRICTORDER_ACC:
167 default:
168 dhp->dh_hat_attr = HAT_STRICTORDER;
169 }
170
171 /* don't use large pages */
172 dhp->dh_mmulevel = 0;
173 dhp->dh_flags &= ~DEVMAP_FLAG_LARGE;
174
175 dhp->dh_flags |= DEVMAP_SETUP_DONE;
176 }