And set master by default for pci devices. So that DMA is allowed.
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
---
lib/pci.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/lib/pci.c b/lib/pci.c
index ef0b02a..044e4db 100644
--- a/lib/pci.c
+++ b/lib/pci.c
@@ -7,6 +7,13 @@
#include "pci.h"
#include "asm/pci.h"
+static void pci_set_master(pci_dev *dev, int master)
+{
+ uint32_t val = pci_config_read(dev->pci_addr, PCI_COMMAND);
+ val |= PCI_COMMAND_MASTER;
+ pci_config_write(dev->pci_addr, PCI_COMMAND, val);
+}
+
/*
* Scan bus look for a specific device. Only bus 0 scanned for now.
* After the scan, a pci_dev is returned with correct BAR information.
@@ -41,6 +48,8 @@ int pci_dev_init(pci_dev *dev, uint16_t vendor_id, uint16_t device_id)
}
dev->inited = true;
+ pci_set_master(dev, 1);
+
return 0;
}
--
2.7.4
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