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o Don't hardcode that Yukon FE has 16KB SRAM. In fact, Yukon FE has

Browse Source 
only 4KB SRAM.
 o Rework setting Tx/Rx RAM buffer size. Give receiver 2/3 of memory
   and round it down to the multiple of 1024. The RAM buffer size of
   Yukon II should be multiple of 1024. This fixes bogus RAM buffer
   configuration used in Yukon FE.

Reported by:	Oleg Lomaka  < oleg AT lomaka DOT org DOT ua >
Tested by:	Oleg Lomaka  < oleg AT lomaka DOT org DOT ua >
This commit is contained in:
Pyun YongHyeon 2007-11-20 07:07:33 +00:00
parent 1b67beea13
commit e4a5f4e04b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=173772
1 changed files with 12 additions and 38 deletions
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50
sys/dev/msk/if_msk.c
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@ -1028,64 +1028,38 @@ mskc_probe(device_t dev)
static int
mskc_setup_rambuffer(struct msk_softc *sc)
{
int totqsize, minqsize;
int avail, next;
int next;
int i;
uint8_t val;
/* Get adapter SRAM size. */
val = CSR_READ_1(sc, B2_E_0);
sc->msk_ramsize = (val == 0) ? 128 : val * 4;
if (sc->msk_hw_id == CHIP_ID_YUKON_FE)
sc->msk_ramsize = 4 * 4;
if (bootverbose)
device_printf(sc->msk_dev,
"RAM buffer size : %dKB\n", sc->msk_ramsize);
totqsize = sc->msk_ramsize * sc->msk_num_port;
minqsize = MSK_MIN_RXQ_SIZE + MSK_MIN_TXQ_SIZE;
if (minqsize > sc->msk_ramsize)
minqsize = sc->msk_ramsize;
if (minqsize * sc->msk_num_port > totqsize) {
device_printf(sc->msk_dev,
"not enough RAM buffer memory : %d/%dKB\n",
minqsize * sc->msk_num_port, totqsize);
return (ENOSPC);
}
avail = totqsize;
if (sc->msk_num_port > 1) {
/*
* Divide up the memory evenly so that everyone gets a
* fair share for dual port adapters.
*/
avail = sc->msk_ramsize;
}
/* Take away the minimum memory for active queues. */
avail -= minqsize;
/* Rx queue gets the minimum + 80% of the rest. */
sc->msk_rxqsize =
(avail * MSK_RAM_QUOTA_RX) / 100 + MSK_MIN_RXQ_SIZE;
avail -= (sc->msk_rxqsize - MSK_MIN_RXQ_SIZE);
sc->msk_txqsize = avail + MSK_MIN_TXQ_SIZE;
/*
* Give receiver 2/3 of memory and round down to the multiple
* of 1024. Tx/Rx RAM buffer size of Yukon II shoud be multiple
* of 1024.
*/
sc->msk_rxqsize = rounddown((sc->msk_ramsize * 1024 * 2) / 3, 1024);
sc->msk_txqsize = (sc->msk_ramsize * 1024) - sc->msk_rxqsize;
for (i = 0, next = 0; i < sc->msk_num_port; i++) {
sc->msk_rxqstart[i] = next;
sc->msk_rxqend[i] = next + (sc->msk_rxqsize * 1024) - 1;
sc->msk_rxqend[i] = next + sc->msk_rxqsize - 1;
next = sc->msk_rxqend[i] + 1;
sc->msk_txqstart[i] = next;
sc->msk_txqend[i] = next + (sc->msk_txqsize * 1024) - 1;
sc->msk_txqend[i] = next + sc->msk_txqsize - 1;
next = sc->msk_txqend[i] + 1;
if (bootverbose) {
device_printf(sc->msk_dev,
"Port %d : Rx Queue %dKB(0x%08x:0x%08x)\n", i,
sc->msk_rxqsize, sc->msk_rxqstart[i],
sc->msk_rxqsize / 1024, sc->msk_rxqstart[i],
sc->msk_rxqend[i]);
device_printf(sc->msk_dev,
"Port %d : Tx Queue %dKB(0x%08x:0x%08x)\n", i,
sc->msk_txqsize, sc->msk_txqstart[i],
sc->msk_txqsize / 1024, sc->msk_txqstart[i],
sc->msk_txqend[i]);
}
}