/share/man/man4/ahd.4

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  1. .\"
  2. .\" Copyright (c) 1995, 1996, 1997, 1998, 2000
  3. .\" Justin T. Gibbs. All rights reserved.
  4. .\" Copyright (c) 2002
  5. .\" Scott Long. All rights reserved.
  6. .\"
  7. .\" Redistribution and use in source and binary forms, with or without
  8. .\" modification, are permitted provided that the following conditions
  9. .\" are met:
  10. .\" 1. Redistributions of source code must retain the above copyright
  11. .\" notice, this list of conditions and the following disclaimer.
  12. .\" 2. Redistributions in binary form must reproduce the above copyright
  13. .\" notice, this list of conditions and the following disclaimer in the
  14. .\" documentation and/or other materials provided with the distribution.
  15. .\" 3. The name of the author may not be used to endorse or promote products
  16. .\" derived from this software without specific prior written permission.
  17. .\"
  18. .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19. .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20. .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21. .\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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  28. .\"
  29. .\" $FreeBSD$
  30. .\"
  31. .Dd July 4, 2004
  32. .Dt AHD 4
  33. .Os
  34. .Sh NAME
  35. .Nm ahd
  36. .Nd Adaptec PCI/PCI-X Ultra320 SCSI host adapter driver
  37. .Sh SYNOPSIS
  38. To compile this driver into the kernel,
  39. place the following lines in your
  40. kernel configuration file:
  41. .Bd -ragged -offset indent
  42. .Cd "device pci"
  43. .Cd "device scbus"
  44. .Cd "device ahd"
  45. .Pp
  46. To compile in debugging code:
  47. .Cd options AHD_DEBUG
  48. .Cd options AHD_DEBUG_OPTS=<bitmask of options>
  49. .Cd options AHD_REG_PRETTY_PRINT
  50. .Pp
  51. To configure one or more controllers to assume the target role:
  52. .Cd options AHD_TMODE_ENABLE=<bitmask of units>
  53. .Ed
  54. .Pp
  55. Alternatively, to load the driver as a
  56. module at boot time, place the following line in
  57. .Xr loader.conf 5 :
  58. .Bd -literal -offset indent
  59. ahd_load="YES"
  60. .Ed
  61. .Sh DESCRIPTION
  62. This driver provides access to the
  63. .Tn SCSI
  64. bus(es) connected to Adaptec
  65. .Tn AIC79xx
  66. host adapter chips.
  67. .Pp
  68. Driver features include support for narrow and wide busses,
  69. fast, ultra, ultra2, ultra160, and ultra320 synchronous transfers,
  70. packetized transfers, tagged queueing, 512 SCB's, and target mode.
  71. .Pp
  72. The
  73. .Dv AHD_DEBUG_OPTS
  74. option is used to control which diagnostic messages are printed to the
  75. console when
  76. .Dv AHD_DEBUG
  77. is enabled.
  78. Logically OR the following bits together:
  79. .Bl -column -offset indent Value Function
  80. .Em "Value Function"
  81. 0x0001 Show miscellaneous information
  82. 0x0002 Show sense data
  83. 0x0004 Show Serial EEPROM contents
  84. 0x0008 Show bus termination settings
  85. 0x0010 Show host memory usage
  86. 0x0020 Show SCSI protocol messages
  87. 0x0040 Show mode pointer of the chip register window
  88. 0x0080 Show selection timeouts
  89. 0x0100 Show FIFO usage messages
  90. 0x0200 Show Queue Full status
  91. 0x0400 Show SCB queue status
  92. 0x0800 Show inbound packet information
  93. 0x1000 Show S/G list information
  94. 0x2000 Enable extra diagnostic code in the firmware
  95. .El
  96. .Pp
  97. The
  98. .Dv AHD_REG_PRETTY_PRINT
  99. option compiles in support for human-readable bit definitions for each register
  100. that is printed by the debugging code.
  101. However, it also bloats the compiled
  102. size of the driver by approximately 215KB.
  103. .Pp
  104. Individual controllers may be configured to operate in the target role
  105. through the
  106. .Dv AHD_TMODE_ENABLE
  107. configuration option.
  108. The value assigned to this option should be a bitmap
  109. of all units where target mode is desired.
  110. For example, a value of 0x25 would enable target mode on units 0, 2, and 5.
  111. Note that target mode is only supported for ultra160 speeds and below.
  112. .Pp
  113. Per target configuration performed in the
  114. .Tn SCSI-Select
  115. menu, accessible at boot,
  116. is honored by this driver.
  117. This includes synchronous/asynchronous transfers,
  118. maximum synchronous negotiation rate,
  119. wide transfers,
  120. disconnection,
  121. and the host adapter's
  122. .Tn SCSI
  123. ID.
  124. .Sh HARDWARE
  125. The
  126. .Nm
  127. driver supports the following:
  128. .Pp
  129. .Bl -bullet -compact
  130. .It
  131. Adaptec
  132. .Tn AIC7901
  133. host adapter chip
  134. .It
  135. Adaptec
  136. .Tn AIC7901A
  137. host adapter chip
  138. .It
  139. Adaptec
  140. .Tn AIC7902
  141. host adapter chip
  142. .It
  143. Adaptec
  144. .Tn 29320
  145. host adapter
  146. .It
  147. Adaptec
  148. .Tn 39320
  149. host adapter
  150. .It
  151. Many motherboards with on-board
  152. .Tn SCSI
  153. support
  154. .El
  155. .Sh SEE ALSO
  156. .Xr ahc 4 ,
  157. .Xr cd 4 ,
  158. .Xr da 4 ,
  159. .Xr sa 4 ,
  160. .Xr scsi 4
  161. .Sh HISTORY
  162. The
  163. .Nm
  164. driver first appeared in
  165. .Fx 4.7 .
  166. .Sh AUTHORS
  167. The
  168. .Nm
  169. driver, the
  170. .Tn AIC7xxx
  171. sequencer-code assembler,
  172. and the firmware running on the aic79xx chips was written by
  173. .An Justin T. Gibbs .
  174. This manual page is based on the
  175. .Xr ahc 4
  176. manual page.
  177. .Sh BUGS
  178. The current generation of 79xx chips do not support target mode in Ultra320
  179. mode.
  180. Target mode in general has not been well tested in this driver.