On Thu, Dec 01, 2016 at 02:30:58AM -0600, Bjorn Helgaas wrote:
> From: Tomasz Nowicki <tn@xxxxxxxxxxxx>
>
> ThunderX PCIe controller to off-chip devices (so-called PEM) is not fully
> compliant with ECAM standard. It uses non-standard configuration space
> accessors (see thunder_pem_ecam_ops) and custom configuration space
> granulation (see bus_shift = 24). In order to access configuration space
> and probe PEM as ACPI-based PCI host controller we need to add MCFG quirk
> infrastructure. This involves:
> 1. A new thunder_pem_acpi_init() init function to locate PEM-specific
> register ranges using ACPI.
> 2. Export PEM thunder_pem_ecam_ops structure so it is visible to MCFG quirk
> code.
> 3. New quirk entries for each PEM segment. Each contains platform IDs,
> mentioned thunder_pem_ecam_ops and CFG resources.
>
> Quirk is considered for ThunderX silicon pass2.x only which is identified
> via MCFG revision 1.
>
> [bhelgaas: adapt to use acpi_get_rc_resources(), update Makefile/ifdefs so
> quirk doesn't depend on CONFIG_PCI_HOST_THUNDER_PEM]
> Signed-off-by: Tomasz Nowicki <tn@xxxxxxxxxxxx>
> Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> ---
> drivers/acpi/pci_mcfg.c | 19 ++++++++++++++++++
> drivers/pci/host/Makefile | 2 +-
> drivers/pci/host/pci-thunder-pem.c | 38 ++++++++++++++++++++++++++++++++++++
> include/linux/pci-ecam.h | 1 +
> 4 files changed, 59 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/pci_mcfg.c b/drivers/acpi/pci_mcfg.c
> index c6a6949..a48b508 100644
> --- a/drivers/acpi/pci_mcfg.c
> +++ b/drivers/acpi/pci_mcfg.c
> @@ -74,6 +74,25 @@ static struct mcfg_fixup mcfg_quirks[] = {
> HISI_QUAD_DOM("HIP07 ", 4, &hisi_pcie_ops),
> HISI_QUAD_DOM("HIP07 ", 8, &hisi_pcie_ops),
> HISI_QUAD_DOM("HIP07 ", 12, &hisi_pcie_ops),
> +
> +#define THUNDER_PEM_RES(addr, node) \
> + DEFINE_RES_MEM(addr + (node << 44), 0x39 * SZ_16M)
I assume we should do s/node/seg/ here as well? I already did that for
THUNDER_ECAM_QUIRK in the next patch.
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