Author: mjacob
Date: Fri Aug 6 17:27:00 2010
New Revision: 210943
URL: http://svn.freebsd.org/changeset/base/210943
Log:
Figure which is the IO and MEM bars- do not assume that they are in
a fixed order.
PR: 149220
Obtained from: John Baldwin
MFC after: 1 month
Modified:
head/sys/dev/mpt/mpt_pci.c
Modified: head/sys/dev/mpt/mpt_pci.c
==============================================================================
--- head/sys/dev/mpt/mpt_pci.c Fri Aug 6 17:21:32 2010 (r210942)
+++ head/sys/dev/mpt/mpt_pci.c Fri Aug 6 17:27:00 2010 (r210943)
@@ -194,8 +194,6 @@ __FBSDID("$FreeBSD$");
#endif
-#define MPT_IO_BAR 0
-#define MPT_MEM_BAR 1
static int mpt_pci_probe(device_t);
static int mpt_pci_attach(device_t);
@@ -420,6 +418,7 @@ mpt_pci_attach(device_t dev)
struct mpt_softc *mpt;
int iqd;
uint32_t data, cmd;
+ int mpt_io_bar, mpt_mem_bar;
/* Allocate the softc structure */
mpt = (struct mpt_softc*)device_get_softc(dev);
@@ -505,11 +504,25 @@ mpt_pci_attach(device_t dev)
}
/*
+ * Figure out which are the I/O and MEM Bars
+ */
+ data = pci_read_config(dev, PCIR_BAR(0), 4);
+ if (PCI_BAR_IO(data)) {
+ /* BAR0 is IO, BAR1 is memory */
+ mpt_io_bar = 0;
+ mpt_mem_bar = 1;
+ } else {
+ /* BAR0 is memory, BAR1 is IO */
+ mpt_mem_bar = 0;
+ mpt_io_bar = 1;
+ }
+
+ /*
* Set up register access. PIO mode is required for
* certain reset operations (but must be disabled for
* some cards otherwise).
*/
- mpt->pci_pio_rid = PCIR_BAR(MPT_IO_BAR);
+ mpt->pci_pio_rid = PCIR_BAR(mpt_io_bar);
mpt->pci_pio_reg = bus_alloc_resource(dev, SYS_RES_IOPORT,
&mpt->pci_pio_rid, 0, ~0, 0, RF_ACTIVE);
if (mpt->pci_pio_reg == NULL) {
@@ -520,7 +533,7 @@ mpt_pci_attach(device_t dev)
mpt->pci_pio_sh = rman_get_bushandle(mpt->pci_pio_reg);
/* Allocate kernel virtual memory for the 9x9's Mem0 region */
- mpt->pci_mem_rid = PCIR_BAR(MPT_MEM_BAR);
+ mpt->pci_mem_rid = PCIR_BAR(mpt_mem_bar);
mpt->pci_reg = bus_alloc_resource(dev, SYS_RES_MEMORY,
&mpt->pci_mem_rid, 0, ~0, 0, RF_ACTIVE);
if (mpt->pci_reg == NULL) {
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