diff options
Diffstat (limited to 'sys/dev/aic7xxx/aic79xx_osm.h')
| -rw-r--r-- | sys/dev/aic7xxx/aic79xx_osm.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sys/dev/aic7xxx/aic79xx_osm.h b/sys/dev/aic7xxx/aic79xx_osm.h index 3c97a63d3e0a..b786cec2baf4 100644 --- a/sys/dev/aic7xxx/aic79xx_osm.h +++ b/sys/dev/aic7xxx/aic79xx_osm.h @@ -102,7 +102,8 @@ * The number of dma segments supported. The sequencer can handle any number * of physically contiguous S/G entrys. To reduce the driver's memory * consumption, we limit the number supported to be sufficient to handle - * the largest mapping supported by the kernel, MAXPHYS. Assuming the + * the largest mapping supported by the the legacy kernel MAXPHYS setting of + * 128K. This can be increased once some testing is done. Assuming the * transfer is as fragmented as possible and unaligned, this turns out to * be the number of paged sized transfers in MAXPHYS plus an extra element * to handle any unaligned residual. The sequencer fetches SG elements @@ -110,7 +111,8 @@ * multiple of 16 which should align us on even the largest of cacheline * boundaries. */ -#define AHD_NSEG (roundup(btoc(MAXPHYS) + 1, 16)) +#define AHD_MAXPHYS (128 * 1024) +#define AHD_NSEG (roundup(btoc(AHD_MAXPHYS) + 1, 16)) /* This driver supports target mode */ #ifdef NOT_YET |