arch/arm/plat-omap/dsp/ipbuf.h

   1 /*
   2  * This file is part of OMAP DSP driver (DSP Gateway version 3.3.1)
   3  *
   4  * Copyright (C) 2002-2006 Nokia Corporation. All rights reserved.
   5  *
   6  * Contact: Toshihiro Kobayashi <toshihiro.kobayashi@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 struct ipbuf {
  25         u16 c;                  /* count */
  26         u16 next;               /* link */
  27         u16 la;                 /* lock owner (ARM side) */
  28         u16 sa;                 /* sync word (ARM->DSP) */
  29         u16 ld;                 /* lock owner (DSP side) */
  30         u16 sd;                 /* sync word (DSP->ARM) */
  31         unsigned char d[0];     /* data */
  32 };
  33
  34 struct ipbuf_p {
  35         u16 c;          /* count */
  36         u16 s;          /* sync word */
  37         u16 al;         /* data address lower */
  38         u16 ah;         /* data address upper */
  39 };
  40
  41 #define IPBUF_SYS_DLEN  31
  42
  43 struct ipbuf_sys {
  44         u16 s;                  /* sync word */
  45         u16 d[IPBUF_SYS_DLEN];  /* data */
  46 };
  47
  48 struct ipbcfg {
  49         u16 ln;
  50         u16 lsz;
  51         void *base;
  52         u16 bsycnt;
  53         unsigned long cnt_full; /* count of IPBFULL error */
  54 };
  55
  56 struct ipbuf_head {
  57         u16 bid;
  58         struct ipbuf *p;
  59 };
  60
  61 extern struct ipbcfg ipbcfg;
  62 extern struct ipbuf_sys *ipbuf_sys_da, *ipbuf_sys_ad;
  63
  64 #define ipb_bsycnt_inc(ipbcfg) \
  65         do { \
  66                 disable_mbx_irq(mbx_dsp); \
  67                 (ipbcfg)->bsycnt++; \
  68                 enable_mbx_irq(mbx_dsp); \
  69         } while(0)
  70
  71 #define ipb_bsycnt_dec(ipbcfg) \
  72         do { \
  73                 disable_mbx_irq(mbx_dsp); \
  74                 (ipbcfg)->bsycnt--; \
  75                 enable_mbx_irq(mbx_dsp); \
  76         } while(0)
  77
  78 #define dsp_mem_enable_ipbuf()  dsp_mem_enable(ipbcfg.base)
  79 #define dsp_mem_disable_ipbuf() dsp_mem_disable(ipbcfg.base)
  80
  81 struct ipblink {
  82         spinlock_t lock;
  83         u16 top;
  84         u16 tail;
  85 };
  86
  87 #define IPBLINK_INIT { \
  88                 .lock = SPIN_LOCK_UNLOCKED, \
  89                 .top  = BID_NULL, \
  90                 .tail = BID_NULL, \
  91         }
  92
  93 #define INIT_IPBLINK(link) \
  94         do { \
  95                 spin_lock_init(&(link)->lock); \
  96                 (link)->top  = BID_NULL; \
  97                 (link)->tail = BID_NULL; \
  98         } while(0)
  99
 100 #define RESET_IPBLINK(link) \
 101         do { \
 102                 (link)->top  = BID_NULL; \
 103                 (link)->tail = BID_NULL; \
 104         } while(0)
 105
 106 #define ipblink_empty(link)     ((link)->top == BID_NULL)
 107
 108 static __inline__ void __ipblink_del_top(struct ipblink *link)
 109 {
 110         struct ipbuf_head *ipb_h = bid_to_ipbuf(link->top);
 111
 112         if ((link->top = ipb_h->p->next) == BID_NULL)
 113                 link->tail = BID_NULL;
 114         else
 115                 ipb_h->p->next = BID_NULL;
 116 }
 117
 118 static __inline__ void ipblink_del_top(struct ipblink *link)
 119 {
 120         spin_lock(&link->lock);
 121         __ipblink_del_top(link);
 122         spin_unlock(&link->lock);
 123 }
 124
 125 static __inline__ void __ipblink_add_tail(struct ipblink *link, u16 bid)
 126 {
 127         if (ipblink_empty(link))
 128                 link->top = bid;
 129         else
 130                 bid_to_ipbuf(link->tail)->p->next = bid;
 131         link->tail = bid;
 132 }
 133
 134 static __inline__ void ipblink_add_tail(struct ipblink *link, u16 bid)
 135 {
 136         spin_lock(&link->lock);
 137         __ipblink_add_tail(link, bid);
 138         spin_unlock(&link->lock);
 139 }
 140
 141 static __inline__ void __ipblink_flush(struct ipblink *link)
 142 {
 143         u16 bid;
 144
 145         while (!ipblink_empty(link)) {
 146                 bid = link->top;
 147                 __ipblink_del_top(link);
 148                 unuse_ipbuf(bid_to_ipbuf(bid));
 149         }
 150 }
 151
 152 static __inline__ void ipblink_flush(struct ipblink *link)
 153 {
 154         spin_lock(&link->lock);
 155         __ipblink_flush(link);
 156         spin_unlock(&link->lock);
 157 }
 158
 159 static __inline__ void __ipblink_add_pvt(struct ipblink *link)
 160 {
 161         link->top  = BID_PVT;
 162         link->tail = BID_PVT;
 163 }
 164
 165 static __inline__ void ipblink_add_pvt(struct ipblink *link)
 166 {
 167         spin_lock(&link->lock);
 168         __ipblink_add_pvt(link);
 169         spin_unlock(&link->lock);
 170 }
 171
 172 static __inline__ void __ipblink_del_pvt(struct ipblink *link)
 173 {
 174         link->top  = BID_NULL;
 175         link->tail = BID_NULL;
 176 }
 177
 178 static __inline__ void ipblink_del_pvt(struct ipblink *link)
 179 {
 180         spin_lock(&link->lock);
 181         __ipblink_del_pvt(link);
 182         spin_unlock(&link->lock);
 183 }
 184
 185 static __inline__ void __ipblink_flush_pvt(struct ipblink *link)
 186 {
 187         if (!ipblink_empty(link))
 188                 ipblink_del_pvt(link);
 189 }
 190
 191 static __inline__ void ipblink_flush_pvt(struct ipblink *link)
 192 {
 193         spin_lock(&link->lock);
 194         __ipblink_flush_pvt(link);
 195         spin_unlock(&link->lock);
 196 }
 197
 198 #define ipblink_for_each(bid, link) \
 199         for (bid = (link)->top; bid != BID_NULL; bid = bid_to_ipbuf(bid)->p->next)