diff options
Diffstat (limited to 'sys/dev/aacraid/aacraid_var.h')
| -rw-r--r-- | sys/dev/aacraid/aacraid_var.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sys/dev/aacraid/aacraid_var.h b/sys/dev/aacraid/aacraid_var.h index 4fed21b1356b..bbafdafb8840 100644 --- a/sys/dev/aacraid/aacraid_var.h +++ b/sys/dev/aacraid/aacraid_var.h @@ -471,6 +471,14 @@ struct aac_softc }; /* + * Max. I/O size in bytes. + * Reserve one page for the DMA subsystem, that may need it when the + * I/O buffer is not page aligned. + */ +#define AAC_MAXIO_SIZE(sc) MIN(((sc)->aac_max_sectors << 9) - PAGE_SIZE, \ + maxphys) + +/* * Event callback mechanism for the driver */ #define AAC_EVENT_NONE 0x00 |