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Support for VMWare Workstation 6.x

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VMWare Workstation 6.x would previously die when running MINIX 3 with an
IOSPACE assertion and several error messages about multiply registered
I/O ports. The assertion is triggered when we probe for BAR sizes in
record_bar(). The solution: The PCI driver now disables I/O and mem
access before probing for BAR sizes.

Bumped up NR_PCIDEV and NR_PCIBUS, since Workstation 6.x virtualizes
more PCI buses and devices.
This commit is contained in:
Arun Thomas 2009-05-27 23:35:34 +00:00
parent 745f99bb1d
commit dac531addf
2 changed files with 21 additions and 5 deletions
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25
drivers/pci/pci.c
View file

@ -33,8 +33,8 @@ Created: Jan 2000 by Philip Homburg <philip@cs.vu.nl>
#include <string.h>
#include <minix/sysutil.h>
#define NR_PCIBUS 10
#define NR_PCIDEV 40
#define NR_PCIBUS 40
#define NR_PCIDEV 50
#define PBT_INTEL_HOST 1
#define PBT_PCIBRIDGE 2
@ -1135,16 +1135,24 @@ int bar_nr;
{
int reg, prefetch, type, dev_bar_nr;
u32_t bar, bar2;
u16_t cmd;
reg= PCI_BAR+4*bar_nr;
bar= pci_attr_r32_u(devind, reg);
if (bar & PCI_BAR_IO)
{
/* Size register */
/* Disable I/O access before probing for BAR's size */
cmd = pci_attr_r16(devind, PCI_CR);
pci_attr_w16(devind, PCI_CR, cmd & ~PCI_CR_IO_EN);
/* Probe BAR's size */
pci_attr_w32(devind, reg, 0xffffffff);
bar2= pci_attr_r32_u(devind, reg);
/* Restore original state */
pci_attr_w32(devind, reg, bar);
pci_attr_w16(devind, PCI_CR, cmd);
bar &= ~(u32_t)3; /* Clear non-address bits */
bar2 &= ~(u32_t)3;
@ -1168,10 +1176,17 @@ int bar_nr;
}
else
{
/* Size register */
/* Disable mem access before probing for BAR's size */
cmd = pci_attr_r16(devind, PCI_CR);
pci_attr_w16(devind, PCI_CR, cmd & ~PCI_CR_MEM_EN);
/* Probe BAR's size */
pci_attr_w32(devind, reg, 0xffffffff);
bar2= pci_attr_r32_u(devind, reg);
/* Restore original values */
pci_attr_w32(devind, reg, bar);
pci_attr_w16(devind, PCI_CR, cmd);
if (bar2 == 0)
return; /* Reg. is not implemented */
@ -2398,7 +2413,7 @@ u32_t value;
#if 0
printf("pcii_wreg32(%d, %d, 0x%X, 0x%X): %d.%d.%d\n",
busind, devind, port, value,
pcibus[busind].pb_bus, pcidev[devind].pd_dev,
pcibus[busind].pb_busnr, pcidev[devind].pd_dev,
pcidev[devind].pd_func);
#endif
PCII_WREG32_(pcibus[busind].pb_busnr,

1
include/ibm/pci.h
View file

@ -9,6 +9,7 @@ Created: Jan 2000 by Philip Homburg <philip@cs.vu.nl>
#define PCI_DID 0x02 /* Device ID, 16-bit */
#define PCI_CR 0x04 /* Command Register, 16-bit */
#define PCI_CR_MAST_EN 0x0004 /* Enable Busmaster Access */
#define PCI_CR_MEM_EN 0x0002 /* Enable Mem Cycles */
#define PCI_CR_IO_EN 0x0001 /* Enable I/O Cycles */
#define PCI_SR 0x06 /* PCI status, 16-bit */
#define PSR_SSE 0x4000 /* Signaled System Error */