diff options
Diffstat (limited to 'src/kernel/arch/amd64/driver/rtl8139.c')
| -rw-r--r-- | src/kernel/arch/amd64/driver/rtl8139.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/kernel/arch/amd64/driver/rtl8139.c b/src/kernel/arch/amd64/driver/rtl8139.c index e50fb63..fd7717f 100644 --- a/src/kernel/arch/amd64/driver/rtl8139.c +++ b/src/kernel/arch/amd64/driver/rtl8139.c @@ -32,7 +32,8 @@ static uint16_t iobase; #define buflen_shift 3 #define rxbuf_baselen ((8 * 1024) << buflen_shift) -static char rxbuf[rxbuf_baselen + 16 + 1500]; +/* the +16 is apparently required for... something */ +static char rxbuf[rxbuf_baselen + 16]; static size_t rxpos; #define txbuf_len 2048 @@ -68,7 +69,6 @@ void rtl8139_init(uint32_t bdf) { rcr |= 1 << 1; /* accept packets with our mac */ rcr |= 1 << 2; /* accept multicast */ rcr |= 1 << 3; /* accept broadcast */ - rcr |= 1 << 7; /* WARP */ rcr |= buflen_shift << 11; rcr |= 7 << 13; /* no rx threshold, copy whole packets */ port_out32(iobase + RCR, rcr); @@ -126,7 +126,13 @@ static int try_rx(struct pagedir *pages, void __user *dest, size_t dlen) { // kprintf("packet size 0x%x, flags 0x%x, rxpos %x\n", size, flags, rxpos - 4); if (dlen > size) dlen = size; - virt_cpy_to(pages, dest, rxbuf + rxpos, dlen); + if (rxpos + dlen <= rxbuf_baselen) { + virt_cpy_to(pages, dest, rxbuf + rxpos, dlen); + } else { + size_t chunk = rxbuf_baselen - rxpos; + virt_cpy_to(pages, dest, rxbuf + rxpos, chunk); + virt_cpy_to(pages, dest + chunk, rxbuf, dlen - chunk); + } rxpos += size; rxpos = (rxpos + 3) & ~3; |