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bad dma fallback to pio mode

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This commit is contained in:
Ben Gras 2009-04-27 11:53:11 +00:00
parent 3b3e3b36c2
commit e5209d51f1
1 changed files with 22 additions and 17 deletions
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39
drivers/at_wini/at_wini.c
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@ -251,6 +251,8 @@ struct command {
#define IDENTIFIED 0x10 /* w_identify done successfully */
#define IGNORING 0x20 /* w_identify failed once */
#define NO_DMA_VAR "ata_no_dma"
/* Timeouts and max retries. */
int timeout_ticks = DEF_TIMEOUT_TICKS, max_errors = MAX_ERRORS;
long w_standard_timeouts = 0, w_pci_debug = 0, w_instance = 0,
@ -468,7 +470,7 @@ PRIVATE void init_params()
env_parse("ata_std_timeout", "d", 0, &w_standard_timeouts, 0, 1);
env_parse("ata_pci_debug", "d", 0, &w_pci_debug, 0, 1);
env_parse("ata_instance", "d", 0, &w_instance, 0, 8);
env_parse("ata_no_dma", "d", 0, &disable_dma, 0, 1);
env_parse(NO_DMA_VAR, "d", 0, &disable_dma, 0, 1);
env_parse("ata_id_timeout", "d", WAKEUP_SECS, &wakeup_secs, 1, 60);
env_parse("atapi_debug", "d", 0, &atapi_debug, 0, 1);
@ -1393,30 +1395,33 @@ int safe; /* iov contains addresses (0) or grants? */
r= sys_inb(wn->base_dma + DMA_STATUS, &v);
if (r != 0) panic("at_wini", "w_transfer: sys_inb failed", r);
#define BAD_DMA_CONTINUE(msg) { \
printf("at_wini%d: bad DMA: %s. Disabling DMA for drive %d.\n", \
w_instance, msg, wn - wini); \
printf("at_wini%d: workaround: set %s=1 in boot monitor.\n", \
w_instance, NO_DMA_VAR); \
wn->dma = 0; \
continue; \
}
#if 0
printf("dma_status: 0x%x\n", v);
#endif
if (!(v & DMA_ST_INT))
{
/* DMA did not complete successfully */
if (v & DMA_ST_BM_ACTIVE)
panic(w_name(), "DMA did not complete", NO_NUM);
else if (v & DMA_ST_ERROR)
{
printf("at_wini: DMA error\n");
r= EIO;
break;
}
else
{
#if 0
printf("DMA buffer too small\n");
#endif
panic(w_name(), "DMA buffer too small", NO_NUM);
if (v & DMA_ST_BM_ACTIVE) {
BAD_DMA_CONTINUE("DMA did not complete");
} else if (v & DMA_ST_ERROR) {
BAD_DMA_CONTINUE("DMA error");
} else {
BAD_DMA_CONTINUE("DMA buffer too small");
}
}
else if (v & DMA_ST_BM_ACTIVE)
panic(w_name(), "DMA buffer too large", NO_NUM);
else if ((v & DMA_ST_BM_ACTIVE)) {
BAD_DMA_CONTINUE("DMA buffer too large");
}
dma_buf_offset= 0;
while (r == OK && nbytes > 0)