arch/x86/kernel/platform/i86pc/include/sys/xsvc.h

   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 2009 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _SYS_XSVC_H
  28 #define _SYS_XSVC_H
  29
  30 #ifdef __cplusplus
  31 extern "C" {
  32 #endif
  33
  34 #include <sys/avl.h>
  35 #include <sys/types.h>
  36
  37 /* xsvc ioctls */
  38 #define XSVCIOC         ('Q'<< 8)
  39 #define XSVC_ALLOC_MEM  (XSVCIOC | 130)
  40 #define XSVC_FREE_MEM   (XSVCIOC | 131)
  41 #define XSVC_FLUSH_MEM  (XSVCIOC | 132)
  42
  43 /* arg * struct for ioctls */
  44 typedef struct _xsvc_mem_req {
  45         int             xsvc_mem_reqid; /* request ID */
  46         uint64_t        xsvc_mem_addr_lo; /* low DMA address range */
  47         uint64_t        xsvc_mem_addr_hi; /* high DMA address range */
  48         uint64_t        xsvc_mem_align; /* DMA address alignment */
  49         int             xsvc_mem_sgllen; /* s/g length */
  50         size_t          xsvc_mem_size; /* length of mem in bytes */
  51         void            *xsvc_sg_list; /* returned scatter gather list */
  52 } xsvc_mem_req;
  53
  54 /* xsvc_sg_list format */
  55 typedef struct _xsvc_mloc {
  56         uint64_t        mloc_addr;
  57         size_t          mloc_size;
  58 } xsvc_mloc;
  59
  60 #ifdef _KERNEL
  61 /* *** Driver Private Below *** */
  62
  63 /* arg * struct for ioctls from 32-bit app in 64-bit kernel */
  64 #pragma pack(1)
  65 typedef struct _xsvc_mem_req_32 {
  66         int             xsvc_mem_reqid; /* request ID */
  67         uint64_t        xsvc_mem_addr_lo; /* low DMA address range */
  68         uint64_t        xsvc_mem_addr_hi; /* high DMA address range */
  69         uint64_t        xsvc_mem_align; /* DMA address alignment */
  70         int             xsvc_mem_sgllen; /* s/g length */
  71         uint32_t        xsvc_mem_size; /* length of mem in bytes */
  72         uint32_t        xsvc_sg_list; /* returned scatter gather list */
  73 } xsvc_mem_req_32;
  74 #pragma pack()
  75
  76 /* xsvc_sg_list format */
  77 #pragma pack(1)
  78 typedef struct _xsvc_mloc_32 {
  79         uint64_t        mloc_addr;
  80         uint32_t        mloc_size;
  81 } xsvc_mloc_32;
  82 #pragma pack()
  83
  84 /* avl node */
  85 typedef struct xsvc_mnode_s {
  86         avl_node_t              mn_link;
  87         uint64_t                mn_key;
  88         struct xsvc_mem_s       *mn_home;
  89 } xsvc_mnode_t;
  90
  91 /* track memory allocs */
  92 typedef struct xsvc_mem_s {
  93         xsvc_mnode_t            xm_mnode;
  94         size_t                  xm_size;
  95         caddr_t                 xm_addr;
  96         size_t                  xm_real_length;
  97         ddi_dma_handle_t        xm_dma_handle;
  98         ddi_acc_handle_t        xm_mem_handle;
  99         ddi_dma_attr_t          xm_dma_attr;
 100         ddi_device_acc_attr_t   xm_device_attr;
 101         uint_t                  xm_cookie_count;
 102         ddi_dma_cookie_t        xm_cookie;
 103 } xsvc_mem_t;
 104
 105 /* list of memory allocs */
 106 typedef struct xsvc_mlist_s {
 107         kmutex_t        ml_mutex;
 108         avl_tree_t      ml_avl;
 109 } xsvc_mlist_t;
 110
 111 /* driver state */
 112 typedef struct xsvc_state_s {
 113         dev_info_t      *xs_dip;
 114         int             xs_instance;
 115
 116         /*
 117          * track total memory allocated, mutex only covers
 118          * xs_currently_alloced
 119          */
 120         kmutex_t        xs_mutex;
 121         uint64_t        xs_currently_alloced;
 122
 123         kmutex_t        xs_cookie_mutex;
 124
 125         xsvc_mlist_t    xs_mlist;
 126 } xsvc_state_t;
 127
 128 #endif /* _KERNEL */
 129
 130 #ifdef __cplusplus
 131 }
 132 #endif
 133
 134 #endif /* _SYS_XSVC_H */