release/src-rt-6.x.4708/et/sys/et_linux.h

   1 /*
   2  * Linux device driver tunables for
   3  * Broadcom BCM47XX 10/100Mbps Ethernet Device Driver
   4  *
   5  * Copyright (C) 2012, Broadcom Corporation. All Rights Reserved.
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  14  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  16  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  17  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  18  * $Id: et_linux.h 373323 2012-12-07 04:06:16Z $
  19  */
  20
  21 #ifndef _et_linux_h_
  22 #define _et_linux_h_
  23
  24 /* tunables */
  25 #define NTXD            512             /* # tx dma ring descriptors (must be ^2) */
  26 #define NRXD            512             /* # rx dma ring descriptors (must be ^2) */
  27 #if defined(CONFIG_RAM_SIZE) && ((CONFIG_RAM_SIZE > 0) && (CONFIG_RAM_SIZE <= 16))
  28 #define NRXBUFPOST      256             /* try to keep this # rbufs posted to the chip */
  29 #else
  30 #define NRXBUFPOST      320             /* try to keep this # rbufs posted to the chip */
  31 #endif
  32 #define BUFSZ           2048            /* packet data buffer size */
  33 #define RXBUFSZ         (BUFSZ - 256)   /* receive buffer size */
  34
  35 #ifndef RXBND
  36 #define RXBND           32              /* max # rx frames to process in dpc */
  37 #endif
  38
  39 #if defined(ILSIM) || defined(__arch_um__)
  40 #undef  NTXD
  41 #define NTXD            16
  42 #undef  NRXD
  43 #define NRXD            16
  44 #undef  NRXBUFPOST
  45 #define NRXBUFPOST      2
  46 #endif
  47
  48 #define PKTCBND         48
  49
  50 #if defined(CONFIG_RAM_SIZE) && ((CONFIG_RAM_SIZE > 0) && (CONFIG_RAM_SIZE <= 16))
  51 #define CTFPOOLSZ       512
  52 #else
  53 #ifdef __ARM_ARCH_7A__
  54 #define CTFPOOLSZ       1024
  55 #else
  56 #define CTFPOOLSZ       768
  57 #endif
  58 #endif /* CONFIG_RAM_SIZE */
  59
  60 #define PREFSZ                  96
  61 #ifndef PKTC
  62 #define ETPREFHDRS(h, sz)       OSL_PREF_RANGE_ST((h), (sz))
  63 #else
  64 #define ETPREFHDRS(h, sz)
  65 #endif
  66
  67 /* dma tunables */
  68 #ifndef TXMR
  69 #define TXMR                    2       /* number of outstanding reads */
  70 #endif
  71
  72 #ifndef TXPREFTHRESH
  73 #define TXPREFTHRESH            8       /* prefetch threshold */
  74 #endif
  75
  76 #ifndef TXPREFCTL
  77 #define TXPREFCTL               16      /* max descr allowed in prefetch request */
  78 #endif
  79
  80 #ifndef TXBURSTLEN
  81 #define TXBURSTLEN              128     /* burst length for dma reads */
  82 #endif
  83
  84 #ifndef RXPREFTHRESH
  85 #define RXPREFTHRESH            1       /* prefetch threshold */
  86 #endif
  87
  88 #ifndef RXPREFCTL
  89 #define RXPREFCTL               8       /* max descr allowed in prefetch request */
  90 #endif
  91
  92 #ifndef RXBURSTLEN
  93 #define RXBURSTLEN              128     /* burst length for dma writes */
  94 #endif
  95
  96 #endif  /* _et_linux_h_ */