diff options
Diffstat (limited to 'sys/dev/cnw/if_cnw.c')
| -rw-r--r-- | sys/dev/cnw/if_cnw.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/sys/dev/cnw/if_cnw.c b/sys/dev/cnw/if_cnw.c index 4e3f96d..a2d9436 100644 --- a/sys/dev/cnw/if_cnw.c +++ b/sys/dev/cnw/if_cnw.c @@ -156,6 +156,12 @@ __FBSDID("$FreeBSD$"); #include <dev/cnw/if_cnwioctl.h> #include <dev/cnw/if_cnwreg.h> +/* + * Let these be patchable variables, initialized from macros that can + * be set in the kernel config file. Someone with lots of spare time + * could probably write a nice Netwave configuration program to do + * this a little bit more elegantly :-). + */ #ifndef CNW_DOMAIN #define CNW_DOMAIN 0x100 #endif @@ -166,8 +172,23 @@ int cnw_domain = (int)CNW_DOMAIN; /* Domain */ #endif int cnw_skey = CNW_SCRAMBLEKEY; /* Scramble key */ +/* + * The card appears to work much better when we only allow one packet + * "in the air" at a time. This is done by not allowing another packet + * on the card, even if there is room. Turning this off will allow the + * driver to stuff packets on the card as soon as a transmit buffer is + * available. This does increase the number of collisions, though. + * We can que a second packet if there are transmit buffers available, + * but we do not actually send the packet until the last packet has + * been written. + */ #define ONE_AT_A_TIME +/* + * Netwave cards choke if we try to use io memory address >= 0x400. + * Even though, CIS tuple does not talk about this. + * Use memory mapped access. + */ #ifndef MEMORY_MAPPED #define MEMORY_MAPPED #endif |
