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 #ifdef __xpv
  53 #include <sys/hypervisor.h>
  54 #endif
  55
  56 /*
  57  * Create a dummy ddi_umem_cookie given to gfxp_devmap_umem_setup().
  58  */
  59 ddi_umem_cookie_t
  60 gfxp_umem_cookie_init(caddr_t kva, size_t size)
  61 {
  62         struct ddi_umem_cookie *umem_cookie;
  63
  64         umem_cookie = kmem_zalloc(sizeof (struct ddi_umem_cookie), KM_SLEEP);
  65
  66         if (umem_cookie == NULL)
  67                 return (NULL);
  68
  69         umem_cookie->cvaddr = kva;
  70         umem_cookie->type = KMEM_NON_PAGEABLE;
  71         umem_cookie->size = size;
  72
  73         return ((ddi_umem_cookie_t)umem_cookie);
  74 }
  75
  76 void
  77 gfxp_umem_cookie_destroy(ddi_umem_cookie_t cookie)
  78 {
  79         kmem_free(cookie, sizeof (struct ddi_umem_cookie));
  80 }
  81
  82 /*
  83  * called by driver devmap routine to pass kernel virtual address mapping
  84  * info to the framework.
  85  */
  86 /*ARGSUSED*/
  87 int
  88 gfxp_devmap_umem_setup(devmap_cookie_t dhc, dev_info_t *dip,
  89     struct devmap_callback_ctl *callbackops, ddi_umem_cookie_t cookie,
  90     offset_t off, size_t len, uint_t maxprot, uint_t flags,
  91     ddi_device_acc_attr_t *accattrp)
  92 {
  93         uint_t l_flags = flags & ~IOMEM_DATA_MASK; /* clear cache attrs */
  94         int e;
  95
  96         /*
  97          * Set an appropriate attribute from devacc_attr_dataorder
  98          * to keep compatibility. The cache attributes are igonred
  99          * if specified.
 100          */
 101         if (accattrp != NULL) {
 102                 if (accattrp->devacc_attr_dataorder == DDI_STRICTORDER_ACC) {
 103                         l_flags |= IOMEM_DATA_UNCACHED;
 104                 } else if (accattrp->devacc_attr_dataorder ==
 105                     DDI_MERGING_OK_ACC) {
 106                         l_flags |= IOMEM_DATA_UC_WR_COMBINE;
 107                 } else {
 108                         l_flags |= IOMEM_DATA_CACHED;
 109                 }
 110         }
 111
 112         e = devmap_umem_setup(dhc, dip, callbackops, cookie, off, len, maxprot,
 113             l_flags, accattrp);
 114         return (e);
 115 }
 116
 117 /*
 118  * Replacement for devmap_devmem_setup() which will map a machine address
 119  * instead of a register set/offset.
 120  */
 121 void
 122 gfxp_map_devmem(devmap_cookie_t dhc, gfx_maddr_t maddr, size_t length,
 123     ddi_device_acc_attr_t *attrp)
 124 {
 125         devmap_handle_t *dhp = (devmap_handle_t *)dhc;
 126         pfn_t pfn;
 127
 128
 129 #ifdef __xpv
 130         ASSERT(DOMAIN_IS_INITDOMAIN(xen_info));
 131         pfn = xen_assign_pfn(mmu_btop(maddr));
 132 #else
 133         pfn = mmu_btop(maddr);
 134 #endif
 135
 136         dhp->dh_pfn = pfn;
 137         dhp->dh_len = mmu_ptob(mmu_btopr(length));
 138         dhp->dh_roff = 0;
 139
 140 #ifndef DEVMAP_DEVMEM_COOKIE
 141 #define DEVMAP_DEVMEM_COOKIE    ((ddi_umem_cookie_t)0x1) /* XXPV */
 142 #endif /* DEVMAP_DEVMEM_COOKIE */
 143         dhp->dh_cookie = DEVMAP_DEVMEM_COOKIE;
 144         /*LINTED: E_EXPR_NULL_EFFECT*/
 145         dhp->dh_flags |= DEVMAP_DEFAULTS;
 146         dhp->dh_maxprot = PROT_ALL & dhp->dh_orig_maxprot;
 147
 148         /* no callbacks needed */
 149         bzero(&dhp->dh_callbackops, sizeof (struct devmap_callback_ctl));
 150
 151         switch (attrp->devacc_attr_dataorder) {
 152         case DDI_UNORDERED_OK_ACC:
 153                 dhp->dh_hat_attr = HAT_UNORDERED_OK;
 154                 break;
 155         case DDI_MERGING_OK_ACC:
 156                 dhp->dh_hat_attr = HAT_MERGING_OK;
 157                 break;
 158         case DDI_LOADCACHING_OK_ACC:
 159                 dhp->dh_hat_attr = HAT_LOADCACHING_OK;
 160                 break;
 161         case DDI_STORECACHING_OK_ACC:
 162                 dhp->dh_hat_attr = HAT_STORECACHING_OK;
 163                 break;
 164         case DDI_STRICTORDER_ACC:
 165         default:
 166                 dhp->dh_hat_attr = HAT_STRICTORDER;
 167         }
 168
 169         /* don't use large pages */
 170         dhp->dh_mmulevel = 0;
 171         dhp->dh_flags &= ~DEVMAP_FLAG_LARGE;
 172
 173         dhp->dh_flags |= DEVMAP_SETUP_DONE;
 174 }