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rtl8139: enable bus mastering if needed

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This resolves #2.

Change-Id: Ie6736f0d5a713025f09c18de7042ba44fbb1b2f8
This commit is contained in:
David van Moolenbroek 2014-11-17 19:19:36 +00:00
parent e321f65582
commit b49f4cacde
1 changed files with 8 additions and 2 deletions
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10
minix/drivers/net/rtl8139/rtl8139.c
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@ -411,7 +411,7 @@ re_t *rep;
int skip;
{
int r, devind;
u16_t vid, did;
u16_t cr, vid, did;
u32_t bar;
u8_t ilr;
#if VERBOSE
@ -437,7 +437,13 @@ int skip;
printf("%s (%x/%x) at %s\n", dname, vid, did, pci_slot_name(devind));
#endif
pci_reserve(devind);
/* printf("cr = 0x%x\n", pci_attr_r16(devind, PCI_CR)); */
/* Enable bus mastering if necessary. */
cr = pci_attr_r16(devind, PCI_CR);
/* printf("cr = 0x%x\n", cr); */
if (!(cr & PCI_CR_MAST_EN))
pci_attr_w16(devind, PCI_CR, cr | PCI_CR_MAST_EN);
bar= pci_attr_r32(devind, PCI_BAR) & 0xffffffe0;
if (bar < 0x400) {
panic("base address is not properly configured");