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pcie/layerscape: fix bug in bus number computation when setting msi-map

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When multiple PCI cards are present in an ls2080a board, the second
card does not get its msi-map set up properly due to a bug in
computing the bus number.

The bus number returned by PCI_BDF() is not the actual PCI bus
number, but instead represents a global u-boot PCI bus number. A
given bus number is relative to hose->first_busno, so that has to be
subtracted from the PCI device id.

Signed-off-by: Bogdan Purcareata <bogdan.purcareata@nxp.com>
Acked-by: Stuart Yoder <stuart.yoder@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
This commit is contained in:
Bogdan Purcareata 2016-05-17 07:18:40 +00:00 committed by York Sun
parent 5605dc6135
commit 3378727d13
1 changed files with 6 additions and 3 deletions
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9
drivers/pci/pcie_layerscape.c
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@ -569,7 +569,7 @@ static void fdt_fixup_pcie(void *blob)
unsigned char header_type;
int index;
u32 streamid;
pci_dev_t dev;
pci_dev_t dev, bdf;
int bus;
unsigned short id;
struct pci_controller *hose;
@ -611,12 +611,15 @@ static void fdt_fixup_pcie(void *blob)
continue;
}
/* the DT fixup must be relative to the hose first_busno */
bdf = dev - PCI_BDF(hose->first_busno, 0, 0);
/* map PCI b.d.f to streamID in LUT */
ls_pcie_lut_set_mapping(pcie, index, dev >> 8,
ls_pcie_lut_set_mapping(pcie, index, bdf >> 8,
streamid);
/* update msi-map in device tree */
fdt_pcie_set_msi_map_entry(blob, pcie, dev >> 8,
fdt_pcie_set_msi_map_entry(blob, pcie, bdf >> 8,
streamid);
}
}