DragonFly test List (threaded) for 2012-06
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PCIe memory mapped configuration
--Multipart_Tue_Jun_19_22:20:44_2012-1
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No more hang during boot. I'm happy :)
--Multipart_Tue_Jun_19_22:20:44_2012-1
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with best reagrds, Yellow Rabbit
DragonFly 3.1-DEVELOPMENT x86_64
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diff --git a/sys/bus/pci/pci.c b/sys/bus/pci/pci.c
index 7776803..1fb6d95 100644
--- a/sys/bus/pci/pci.c
+++ b/sys/bus/pci/pci.c
@@ -2455,6 +2455,7 @@ pci_add_map(device_t pcib, device_t bus, device_t dev,
int prefetch)
{
uint32_t map;
+ uint16_t old_cmd;
pci_addr_t base;
pci_addr_t start, end, count;
uint8_t ln2size;
@@ -2466,10 +2467,24 @@ pci_add_map(device_t pcib, device_t bus, device_t dev,
struct resource *res;
map = PCIB_READ_CONFIG(pcib, b, s, f, reg, 4);
+
+ /* Disable access to device memory */
+ old_cmd = 0;
+ if (PCI_BAR_MEM(map)) {
+ old_cmd = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_COMMAND, 2);
+ cmd = old_cmd & ~PCIM_CMD_MEMEN;
+ PCIB_WRITE_CONFIG(pcib, b, s, f, PCIR_COMMAND, cmd, 2);
+ }
+
PCIB_WRITE_CONFIG(pcib, b, s, f, reg, 0xffffffff, 4);
testval = PCIB_READ_CONFIG(pcib, b, s, f, reg, 4);
PCIB_WRITE_CONFIG(pcib, b, s, f, reg, map, 4);
+ /* Restore memory access mode */
+ if (PCI_BAR_MEM(map)) {
+ PCIB_WRITE_CONFIG(pcib, b, s, f, PCIR_COMMAND, old_cmd, 2);
+ }
+
if (PCI_BAR_MEM(map)) {
type = SYS_RES_MEMORY;
if (map & PCIM_BAR_MEM_PREFETCH)
--Multipart_Tue_Jun_19_22:20:44_2012-1--
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