usr/src/uts/i86pc/io/gfx_private/gfxp_devmap.c

   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 #include <sys/debug.h>
  28 #include <sys/types.h>
  29 #include <sys/param.h>
  30 #include <sys/time.h>
  31 #include <sys/buf.h>
  32 #include <sys/errno.h>
  33 #include <sys/systm.h>
  34 #include <sys/conf.h>
  35 #include <sys/signal.h>
  36 #include <vm/page.h>
  37 #include <vm/as.h>
  38 #include <vm/hat.h>
  39 #include <vm/seg.h>
  40 #include <vm/seg_dev.h>
  41 #include <vm/hat_i86.h>
  42 #include <sys/ddi.h>
  43 #include <sys/devops.h>
  44 #include <sys/sunddi.h>
  45 #include <sys/ddi_impldefs.h>
  46 #include <sys/fs/snode.h>
  47 #include <sys/pci.h>
  48 #include <sys/vmsystm.h>
  49 #include <sys/int_fmtio.h>
  50 #include <sys/gfx_private.h>
  51
  52
  53 /*
  54  * Create a dummy ddi_umem_cookie given to gfxp_devmap_umem_setup().
  55  */
  56 ddi_umem_cookie_t
  57 gfxp_umem_cookie_init(caddr_t kva, size_t size)
  58 {
  59         struct ddi_umem_cookie *umem_cookie;
  60
  61         umem_cookie = kmem_zalloc(sizeof (struct ddi_umem_cookie), KM_SLEEP);
  62
  63         if (umem_cookie == NULL)
  64                 return (NULL);
  65
  66         umem_cookie->cvaddr = kva;
  67         umem_cookie->type = KMEM_NON_PAGEABLE;
  68         umem_cookie->size = size;
  69
  70         return ((ddi_umem_cookie_t)umem_cookie);
  71 }
  72
  73 void
  74 gfxp_umem_cookie_destroy(ddi_umem_cookie_t cookie)
  75 {
  76         kmem_free(cookie, sizeof (struct ddi_umem_cookie));
  77 }
  78
  79 /*
  80  * called by driver devmap routine to pass kernel virtual address mapping
  81  * info to the framework.
  82  */
  83 /*ARGSUSED*/
  84 int
  85 gfxp_devmap_umem_setup(devmap_cookie_t dhc, dev_info_t *dip,
  86     struct devmap_callback_ctl *callbackops, ddi_umem_cookie_t cookie,
  87     offset_t off, size_t len, uint_t maxprot, uint_t flags,
  88     ddi_device_acc_attr_t *accattrp)
  89 {
  90         uint_t l_flags = flags & ~IOMEM_DATA_MASK; /* clear cache attrs */
  91         int e;
  92
  93         /*
  94          * Set an appropriate attribute from devacc_attr_dataorder
  95          * to keep compatibility. The cache attributes are igonred
  96          * if specified.
  97          */
  98         if (accattrp != NULL) {
  99                 if (accattrp->devacc_attr_dataorder == DDI_STRICTORDER_ACC) {
 100                         l_flags |= IOMEM_DATA_UNCACHED;
 101                 } else if (accattrp->devacc_attr_dataorder ==
 102                     DDI_MERGING_OK_ACC) {
 103                         l_flags |= IOMEM_DATA_UC_WR_COMBINE;
 104                 } else {
 105                         l_flags |= IOMEM_DATA_CACHED;
 106                 }
 107         }
 108
 109         e = devmap_umem_setup(dhc, dip, callbackops, cookie, off, len, maxprot,
 110             l_flags, accattrp);
 111         return (e);
 112 }
 113
 114 /*
 115  * Replacement for devmap_devmem_setup() which will map a machine address
 116  * instead of a register set/offset.
 117  */
 118 void
 119 gfxp_map_devmem(devmap_cookie_t dhc, gfx_maddr_t maddr, size_t length,
 120     ddi_device_acc_attr_t *attrp)
 121 {
 122         devmap_handle_t *dhp = (devmap_handle_t *)dhc;
 123         pfn_t pfn;
 124
 125
 126         pfn = mmu_btop(maddr);
 127
 128         dhp->dh_pfn = pfn;
 129         dhp->dh_len = mmu_ptob(mmu_btopr(length));
 130         dhp->dh_roff = 0;
 131
 132 #ifndef DEVMAP_DEVMEM_COOKIE
 133 #define DEVMAP_DEVMEM_COOKIE    ((ddi_umem_cookie_t)0x1) /* XXPV */
 134 #endif /* DEVMAP_DEVMEM_COOKIE */
 135         dhp->dh_cookie = DEVMAP_DEVMEM_COOKIE;
 136         /*LINTED: E_EXPR_NULL_EFFECT*/
 137         dhp->dh_flags |= DEVMAP_DEFAULTS;
 138         dhp->dh_maxprot = PROT_ALL & dhp->dh_orig_maxprot;
 139
 140         /* no callbacks needed */
 141         bzero(&dhp->dh_callbackops, sizeof (struct devmap_callback_ctl));
 142
 143         switch (attrp->devacc_attr_dataorder) {
 144         case DDI_UNORDERED_OK_ACC:
 145                 dhp->dh_hat_attr = HAT_UNORDERED_OK;
 146                 break;
 147         case DDI_MERGING_OK_ACC:
 148                 dhp->dh_hat_attr = HAT_MERGING_OK;
 149                 break;
 150         case DDI_LOADCACHING_OK_ACC:
 151                 dhp->dh_hat_attr = HAT_LOADCACHING_OK;
 152                 break;
 153         case DDI_STORECACHING_OK_ACC:
 154                 dhp->dh_hat_attr = HAT_STORECACHING_OK;
 155                 break;
 156         case DDI_STRICTORDER_ACC:
 157         default:
 158                 dhp->dh_hat_attr = HAT_STRICTORDER;
 159         }
 160
 161         /* don't use large pages */
 162         dhp->dh_mmulevel = 0;
 163         dhp->dh_flags &= ~DEVMAP_FLAG_LARGE;
 164
 165         dhp->dh_flags |= DEVMAP_SETUP_DONE;
 166 }