src/sys/bus/cam/cam.c - diff

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-version 1.3, 2003/08/07 21:16:44
+version 1.4, 2003/12/29 23:30:58
  Line 31
  #include <sys/param.h>
  #include "cam.h"
+ #include "cam_ccb.h"
  void
  cam_strvis(u_int8_t *dst, const u_int8_t *src, int srclen, int dstlen)
- Line 108  cam_quirkmatch(caddr_t target, caddr_t q
+ Line 109  cam_quirkmatch(caddr_t target, caddr_t q
          }
          return (NULL);
  }
+ /*
+  * Common calculate geometry fuction
+  *
+  * Caller should set ccg->volume_size and block_size.
+  * The extended parameter should be zero if extended translation
+  * should not be used.
+  */
+ void
+ cam_calc_geometry(struct ccb_calc_geometry *ccg, int extended)
+ {
+         uint32_t size_mb, secs_per_cylinder;
+         size_mb = ccg->volume_size / ((1024L * 1024L) / ccg->block_size);
+         if (size_mb > 1024 && extended) {
+                 ccg->heads = 255;
+                 ccg->secs_per_track = 63;
+         } else {
+                 ccg->heads = 64;
+                 ccg->secs_per_track = 32;
+         }
+         secs_per_cylinder = ccg->heads * ccg->secs_per_track;
+         ccg->cylinders = ccg->volume_size / secs_per_cylinder;
+         ccg->ccb_h.status = CAM_REQ_CMP;
+ }