| Message ID | 20240802171023.85719-2-philmd@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | hw/pci-host/gt64120: Set PCI base address register write mask | expand |
On Fri, 2 Aug 2024, Philippe Mathieu-Daudé wrote: > When booting Linux we see: > > PCI host bridge to bus 0000:00 > pci_bus 0000:00: root bus resource [mem 0x10000000-0x17ffffff] > pci_bus 0000:00: root bus resource [io 0x1000-0x1fffff] > pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff] > pci 0000:00:00.0: [11ab:4620] type 00 class 0x060000 > pci 0000:00:00.0: [Firmware Bug]: reg 0x14: invalid BAR (can't size) > pci 0000:00:00.0: [Firmware Bug]: reg 0x18: invalid BAR (can't size) > pci 0000:00:00.0: [Firmware Bug]: reg 0x1c: invalid BAR (can't size) > pci 0000:00:00.0: [Firmware Bug]: reg 0x20: invalid BAR (can't size) > pci 0000:00:00.0: [Firmware Bug]: reg 0x24: invalid BAR (can't size) > > This is due to missing base address register write mask. > Add it to get: > > PCI host bridge to bus 0000:00 > pci_bus 0000:00: root bus resource [mem 0x10000000-0x17ffffff] > pci_bus 0000:00: root bus resource [io 0x1000-0x1fffff] > pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff] > pci 0000:00:00.0: [11ab:4620] type 00 class 0x060000 > pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x00000fff pref] > pci 0000:00:00.0: reg 0x14: [mem 0x01000000-0x01000fff pref] > pci 0000:00:00.0: reg 0x18: [mem 0x1c000000-0x1c000fff] > pci 0000:00:00.0: reg 0x1c: [mem 0x1f000000-0x1f000fff] > pci 0000:00:00.0: reg 0x20: [mem 0x1be00000-0x1be00fff] > pci 0000:00:00.0: reg 0x24: [io 0x14000000-0x14000fff] > > Since this device is only used by MIPS machines which aren't > versioned, we don't need to update migration compat machinery. > > Mention the datasheet referenced. Remove the "Malta assumptions > ahead" comment since the reset values from the datasheet are used. > > Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> > --- > hw/pci-host/gt64120.c | 14 +++++++++++++- > 1 file changed, 13 insertions(+), 1 deletion(-) > > diff --git a/hw/pci-host/gt64120.c b/hw/pci-host/gt64120.c > index e02efc9e2e..7df2855f32 100644 > --- a/hw/pci-host/gt64120.c > +++ b/hw/pci-host/gt64120.c > @@ -1,6 +1,8 @@ > /* > * QEMU GT64120 PCI host > * > + * (Datasheet GT-64120 Rev 1.4 from Sep 14, 1999) > + * > * Copyright (c) 2006,2007 Aurelien Jarno > * > * Permission is hereby granted, free of charge, to any person obtaining a copy > @@ -1213,17 +1215,27 @@ static void gt64120_realize(DeviceState *dev, Error **errp) > > static void gt64120_pci_realize(PCIDevice *d, Error **errp) > { > - /* FIXME: Malta specific hw assumptions ahead */ > + /* Values from chapter 17.16 "PCI Configuration" */ > + > pci_set_word(d->config + PCI_COMMAND, 0); > pci_set_word(d->config + PCI_STATUS, > PCI_STATUS_FAST_BACK | PCI_STATUS_DEVSEL_MEDIUM); > pci_config_set_prog_interface(d->config, 0); > + > + pci_set_long(d->wmask + PCI_BASE_ADDRESS_0, 0xfffff009); > + pci_set_long(d->wmask + PCI_BASE_ADDRESS_1, 0xfffff009); > + pci_set_long(d->wmask + PCI_BASE_ADDRESS_2, 0xfffff009); > + pci_set_long(d->wmask + PCI_BASE_ADDRESS_3, 0xfffff009); > + pci_set_long(d->wmask + PCI_BASE_ADDRESS_4, 0xfffff009); Documentation says bit 0 is read only 0 for these? Why mask ending with 9 not 8? Also prefetch bit 3 is read only 0 for the last one BAR4. Otherwise: Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu> Regards, BALATON Zoltan > + pci_set_long(d->wmask + PCI_BASE_ADDRESS_5, 0xfffff001); > + > pci_set_long(d->config + PCI_BASE_ADDRESS_0, 0x00000008); > pci_set_long(d->config + PCI_BASE_ADDRESS_1, 0x01000008); > pci_set_long(d->config + PCI_BASE_ADDRESS_2, 0x1c000000); > pci_set_long(d->config + PCI_BASE_ADDRESS_3, 0x1f000000); > pci_set_long(d->config + PCI_BASE_ADDRESS_4, 0x14000000); > pci_set_long(d->config + PCI_BASE_ADDRESS_5, 0x14000001); > + > pci_set_byte(d->config + 0x3d, 0x01); > } > >
On 2/8/24 21:21, BALATON Zoltan wrote: > On Fri, 2 Aug 2024, Philippe Mathieu-Daudé wrote: >> When booting Linux we see: >> >> PCI host bridge to bus 0000:00 >> pci_bus 0000:00: root bus resource [mem 0x10000000-0x17ffffff] >> pci_bus 0000:00: root bus resource [io 0x1000-0x1fffff] >> pci_bus 0000:00: No busn resource found for root bus, will use [bus >> 00-ff] >> pci 0000:00:00.0: [11ab:4620] type 00 class 0x060000 >> pci 0000:00:00.0: [Firmware Bug]: reg 0x14: invalid BAR (can't size) >> pci 0000:00:00.0: [Firmware Bug]: reg 0x18: invalid BAR (can't size) >> pci 0000:00:00.0: [Firmware Bug]: reg 0x1c: invalid BAR (can't size) >> pci 0000:00:00.0: [Firmware Bug]: reg 0x20: invalid BAR (can't size) >> pci 0000:00:00.0: [Firmware Bug]: reg 0x24: invalid BAR (can't size) >> >> This is due to missing base address register write mask. >> Add it to get: >> >> PCI host bridge to bus 0000:00 >> pci_bus 0000:00: root bus resource [mem 0x10000000-0x17ffffff] >> pci_bus 0000:00: root bus resource [io 0x1000-0x1fffff] >> pci_bus 0000:00: No busn resource found for root bus, will use [bus >> 00-ff] >> pci 0000:00:00.0: [11ab:4620] type 00 class 0x060000 >> pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x00000fff pref] >> pci 0000:00:00.0: reg 0x14: [mem 0x01000000-0x01000fff pref] >> pci 0000:00:00.0: reg 0x18: [mem 0x1c000000-0x1c000fff] >> pci 0000:00:00.0: reg 0x1c: [mem 0x1f000000-0x1f000fff] >> pci 0000:00:00.0: reg 0x20: [mem 0x1be00000-0x1be00fff] >> pci 0000:00:00.0: reg 0x24: [io 0x14000000-0x14000fff] >> >> Since this device is only used by MIPS machines which aren't >> versioned, we don't need to update migration compat machinery. >> >> Mention the datasheet referenced. Remove the "Malta assumptions >> ahead" comment since the reset values from the datasheet are used. >> >> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> >> --- >> hw/pci-host/gt64120.c | 14 +++++++++++++- >> 1 file changed, 13 insertions(+), 1 deletion(-) >> static void gt64120_pci_realize(PCIDevice *d, Error **errp) >> { >> - /* FIXME: Malta specific hw assumptions ahead */ >> + /* Values from chapter 17.16 "PCI Configuration" */ >> + >> pci_set_word(d->config + PCI_COMMAND, 0); >> pci_set_word(d->config + PCI_STATUS, >> PCI_STATUS_FAST_BACK | PCI_STATUS_DEVSEL_MEDIUM); >> pci_config_set_prog_interface(d->config, 0); >> + >> + pci_set_long(d->wmask + PCI_BASE_ADDRESS_0, 0xfffff009); >> + pci_set_long(d->wmask + PCI_BASE_ADDRESS_1, 0xfffff009); >> + pci_set_long(d->wmask + PCI_BASE_ADDRESS_2, 0xfffff009); >> + pci_set_long(d->wmask + PCI_BASE_ADDRESS_3, 0xfffff009); >> + pci_set_long(d->wmask + PCI_BASE_ADDRESS_4, 0xfffff009); > > Documentation says bit 0 is read only 0 for these? Why mask ending with > 9 not 8? Also prefetch bit 3 is read only 0 for the last one BAR4. Oops indeed, and also Type/Prefetch for BAR5; updated as: pci_set_long(d->wmask + PCI_BASE_ADDRESS_0, 0xfffff008); /* SCS[1:0] */ pci_set_long(d->wmask + PCI_BASE_ADDRESS_1, 0xfffff008); /* SCS[3:2] */ pci_set_long(d->wmask + PCI_BASE_ADDRESS_2, 0xfffff008); /* CS[2:0] */ pci_set_long(d->wmask + PCI_BASE_ADDRESS_3, 0xfffff008); /* CS[3], BootCS */ pci_set_long(d->wmask + PCI_BASE_ADDRESS_4, 0xfffff000); /* ISD MMIO */ pci_set_long(d->wmask + PCI_BASE_ADDRESS_5, 0xfffff001); /* ISD I/O */ > Otherwise: > > Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu> Thanks! Phil.
diff --git a/hw/pci-host/gt64120.c b/hw/pci-host/gt64120.c index e02efc9e2e..7df2855f32 100644 --- a/hw/pci-host/gt64120.c +++ b/hw/pci-host/gt64120.c @@ -1,6 +1,8 @@ /* * QEMU GT64120 PCI host * + * (Datasheet GT-64120 Rev 1.4 from Sep 14, 1999) + * * Copyright (c) 2006,2007 Aurelien Jarno * * Permission is hereby granted, free of charge, to any person obtaining a copy @@ -1213,17 +1215,27 @@ static void gt64120_realize(DeviceState *dev, Error **errp) static void gt64120_pci_realize(PCIDevice *d, Error **errp) { - /* FIXME: Malta specific hw assumptions ahead */ + /* Values from chapter 17.16 "PCI Configuration" */ + pci_set_word(d->config + PCI_COMMAND, 0); pci_set_word(d->config + PCI_STATUS, PCI_STATUS_FAST_BACK | PCI_STATUS_DEVSEL_MEDIUM); pci_config_set_prog_interface(d->config, 0); + + pci_set_long(d->wmask + PCI_BASE_ADDRESS_0, 0xfffff009); + pci_set_long(d->wmask + PCI_BASE_ADDRESS_1, 0xfffff009); + pci_set_long(d->wmask + PCI_BASE_ADDRESS_2, 0xfffff009); + pci_set_long(d->wmask + PCI_BASE_ADDRESS_3, 0xfffff009); + pci_set_long(d->wmask + PCI_BASE_ADDRESS_4, 0xfffff009); + pci_set_long(d->wmask + PCI_BASE_ADDRESS_5, 0xfffff001); + pci_set_long(d->config + PCI_BASE_ADDRESS_0, 0x00000008); pci_set_long(d->config + PCI_BASE_ADDRESS_1, 0x01000008); pci_set_long(d->config + PCI_BASE_ADDRESS_2, 0x1c000000); pci_set_long(d->config + PCI_BASE_ADDRESS_3, 0x1f000000); pci_set_long(d->config + PCI_BASE_ADDRESS_4, 0x14000000); pci_set_long(d->config + PCI_BASE_ADDRESS_5, 0x14000001); + pci_set_byte(d->config + 0x3d, 0x01); }
When booting Linux we see: PCI host bridge to bus 0000:00 pci_bus 0000:00: root bus resource [mem 0x10000000-0x17ffffff] pci_bus 0000:00: root bus resource [io 0x1000-0x1fffff] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff] pci 0000:00:00.0: [11ab:4620] type 00 class 0x060000 pci 0000:00:00.0: [Firmware Bug]: reg 0x14: invalid BAR (can't size) pci 0000:00:00.0: [Firmware Bug]: reg 0x18: invalid BAR (can't size) pci 0000:00:00.0: [Firmware Bug]: reg 0x1c: invalid BAR (can't size) pci 0000:00:00.0: [Firmware Bug]: reg 0x20: invalid BAR (can't size) pci 0000:00:00.0: [Firmware Bug]: reg 0x24: invalid BAR (can't size) This is due to missing base address register write mask. Add it to get: PCI host bridge to bus 0000:00 pci_bus 0000:00: root bus resource [mem 0x10000000-0x17ffffff] pci_bus 0000:00: root bus resource [io 0x1000-0x1fffff] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff] pci 0000:00:00.0: [11ab:4620] type 00 class 0x060000 pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x00000fff pref] pci 0000:00:00.0: reg 0x14: [mem 0x01000000-0x01000fff pref] pci 0000:00:00.0: reg 0x18: [mem 0x1c000000-0x1c000fff] pci 0000:00:00.0: reg 0x1c: [mem 0x1f000000-0x1f000fff] pci 0000:00:00.0: reg 0x20: [mem 0x1be00000-0x1be00fff] pci 0000:00:00.0: reg 0x24: [io 0x14000000-0x14000fff] Since this device is only used by MIPS machines which aren't versioned, we don't need to update migration compat machinery. Mention the datasheet referenced. Remove the "Malta assumptions ahead" comment since the reset values from the datasheet are used. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> --- hw/pci-host/gt64120.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)