sys/dev/drm/include/drm/intel-gtt.h

   1 /*
   2  * Copyright (c) 2011 The FreeBSD Foundation
   3  * Copyright (c) 2015-2017 François Tigeot
   4  * All rights reserved.
   5  *
   6  * This software was developed by Konstantin Belousov under sponsorship from
   7  * the FreeBSD Foundation.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  */
  30
  31 #ifndef _AGP_INTEL_GTT_H_
  32 #define _AGP_INTEL_GTT_H_
  33
  34 #include <sys/param.h>
  35
  36 #include <vm/vm.h>
  37 #include <vm/vm_page.h>
  38
  39 #include <linux/types.h>
  40 #include <linux/scatterlist.h>
  41
  42 /* Special gtt memory types */
  43 #define AGP_DCACHE_MEMORY       1
  44 #define AGP_PHYS_MEMORY         2
  45
  46 /* New caching attributes for gen6/sandybridge */
  47 #define AGP_USER_CACHED_MEMORY_LLC_MLC (AGP_USER_TYPES + 2)
  48 #define AGP_USER_UNCACHED_MEMORY (AGP_USER_TYPES + 4)
  49
  50 /* flag for GFDT type */
  51 #define AGP_USER_CACHED_MEMORY_GFDT (1 << 3)
  52
  53 struct intel_gtt {
  54         /* Size of memory reserved for graphics by the BIOS */
  55         u_int stolen_size;
  56         /* Total number of gtt entries. */
  57         u_int gtt_total_entries;
  58         /* Part of the gtt that is mappable by the cpu, for those chips where
  59          * this is not the full gtt. */
  60         u_int gtt_mappable_entries;
  61         /* Whether we idle the gpu before mapping/unmapping */
  62         unsigned int do_idle_maps : 1;
  63         /* Share the scratch page dma with ppgtts. */
  64         vm_paddr_t scratch_page_dma;
  65         struct vm_page *scratch_page;
  66         /* for ppgtt PDE access */
  67         uint32_t *gtt;
  68         /* needed for ioremap in drm/i915 */
  69         bus_addr_t gma_bus_addr;
  70 };
  71
  72 struct intel_gtt agp_intel_gtt_get(device_t dev);
  73 int agp_intel_gtt_chipset_flush(device_t dev);
  74 void agp_intel_gtt_clear_range(device_t dev, u_int first_entry,
  75     u_int num_entries);
  76 void agp_intel_gtt_insert_pages(device_t dev, u_int first_entry,
  77     u_int num_entries, vm_page_t *pages, u_int flags);
  78
  79 void intel_gtt_get(u64 *gtt_total, size_t *stolen_size,
  80                    phys_addr_t *mappable_base, u64 *mappable_end);
  81
  82 int intel_gtt_chipset_flush(void);
  83 void intel_gtt_clear_range(u_int first_entry, u_int num_entries);
  84
  85 void intel_gtt_insert_sg_entries(struct sg_table *st,
  86                                  unsigned int pg_start,
  87                                  unsigned int flags);
  88
  89 void intel_gtt_sync_pte(u_int entry);
  90 void intel_gtt_write(u_int entry, uint32_t val);
  91
  92 static inline void intel_gmch_remove(void)
  93 {
  94 }
  95
  96 bool intel_enable_gtt(void);
  97
  98 #endif          /* _AGP_INTEL_GTT_H_ */