Hi, Gentle Ping.. Thanks > -----Original Message----- > From: Shradha Todi <shradha.t@xxxxxxxxxxx> > Sent: Wednesday, January 6, 2021 4:20 PM > Subject: [PATCH v2] PCI: dwc: Add upper limit address for outbound iATU > > The size parameter is unsigned long type which can accept size > 4GB. In that > case, the upper limit address must be programmed. Add support to program the > upper limit address and set INCREASE_REGION_SIZE in case size > 4GB. > > Signed-off-by: Shradha Todi <shradha.t@xxxxxxxxxxx> > --- > v1: https://lkml.org/lkml/2020/12/20/187 > v2: > Addressed Rob's review comment and added PCI version check condition to > avoid writing to reserved registers. > > drivers/pci/controller/dwc/pcie-designware.c | 9 +++++++-- > drivers/pci/controller/dwc/pcie-designware.h | 1 + > 2 files changed, 8 insertions(+), 2 deletions(-) > > diff --git a/drivers/pci/controller/dwc/pcie-designware.c > b/drivers/pci/controller/dwc/pcie-designware.c > index 74590c7..1d62ca9 100644 > --- a/drivers/pci/controller/dwc/pcie-designware.c > +++ b/drivers/pci/controller/dwc/pcie-designware.c > @@ -290,12 +290,17 @@ static void __dw_pcie_prog_outbound_atu(struct > dw_pcie *pci, u8 func_no, > upper_32_bits(cpu_addr)); > dw_pcie_writel_dbi(pci, PCIE_ATU_LIMIT, > lower_32_bits(cpu_addr + size - 1)); > + if (pci->version >= 0x460A) > + dw_pcie_writel_dbi(pci, PCIE_ATU_UPPER_LIMIT, > + upper_32_bits(cpu_addr + size - 1)); > dw_pcie_writel_dbi(pci, PCIE_ATU_LOWER_TARGET, > lower_32_bits(pci_addr)); > dw_pcie_writel_dbi(pci, PCIE_ATU_UPPER_TARGET, > upper_32_bits(pci_addr)); > - dw_pcie_writel_dbi(pci, PCIE_ATU_CR1, type | > - PCIE_ATU_FUNC_NUM(func_no)); > + val = type | PCIE_ATU_FUNC_NUM(func_no); > + val = ((upper_32_bits(size - 1)) && (pci->version >= 0x460A)) ? > + val | PCIE_ATU_INCREASE_REGION_SIZE : val; > + dw_pcie_writel_dbi(pci, PCIE_ATU_CR1, val); > dw_pcie_writel_dbi(pci, PCIE_ATU_CR2, PCIE_ATU_ENABLE); > > /* > diff --git a/drivers/pci/controller/dwc/pcie-designware.h > b/drivers/pci/controller/dwc/pcie-designware.h > index 8b905a2..7da79eb 100644 > --- a/drivers/pci/controller/dwc/pcie-designware.h > +++ b/drivers/pci/controller/dwc/pcie-designware.h > @@ -102,6 +102,7 @@ > #define PCIE_ATU_DEV(x) FIELD_PREP(GENMASK(23, 19), > x) > #define PCIE_ATU_FUNC(x) FIELD_PREP(GENMASK(18, 16), x) > #define PCIE_ATU_UPPER_TARGET 0x91C > +#define PCIE_ATU_UPPER_LIMIT 0x924 > > #define PCIE_MISC_CONTROL_1_OFF 0x8BC > #define PCIE_DBI_RO_WR_EN BIT(0) > -- > 2.7.4
