Hello Murali, > -----Original Message----- > From: Murali Karicheri [mailto:m-karicheri2@xxxxxx] > Sent: Wednesday, June 11, 2014 12:21 AM > To: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; > linux-pci@xxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx; linux- > doc@xxxxxxxxxxxxxxx > Cc: Murali Karicheri; Santosh Shilimkar; Russell King; Grant Likely; Rob Herring; > Mohit KUMAR DCG; Jingoo Han; Bjorn Helgaas; Pratyush ANAND; Richard > Zhu; Kishon Vijay Abraham I; Marek Vasut; Arnd Bergmann; Pawel Moll; > Mark Rutland; Ian Campbell; Kumar Gala; Randy Dunlap > Subject: [PATCH v2 3/8] PCI: designware: update pcie core driver to work > with dw hw version 3.65 > > v3.65 version of the dw hw has MSI controller implemented in the application > space. Add a version variable in the port struct to identify v3.65 hardware for > different code treatment. This variable will have DW_V3_65 bit set when > running on this hw version. The host init code is expected to set this version > based on compatibility string dw,snps-pcie-v3.65. > > Some of the MSI specific functions from current DW driver are re-used on > v3.65 hw. However on v3.65, MSI controller registers are in the application > register space and PCIE_MSI_INTR0_ENABLE is not applicable. > Modify assign_irq() to check for version and not execute the code for > PCIE_MSI_INTR0_ENABLE configuration on v3.65 hw. Additionally MSI IRQ > register in application space is written by EP to raise an MSI IRQ. So add a > get_msi_data() function in pcie_host_ops to retrieve the register address in > dw_msi_setup_irq(). v3.65 dw core driver implements this function. > > Also make some of the functions available in dw core driver global and make > their prototypes available in the header file for re-use on v3.65. > - Pls apply MSI specific changes on the top of Lucas patches: [PATCH 0/4] proper multi MSI handling for designware host Thanks Mohit > Signed-off-by: Murali Karicheri <m-karicheri2@xxxxxx> > > CC: Santosh Shilimkar <santosh.shilimkar@xxxxxx> > CC: Russell King <linux@xxxxxxxxxxxxxxxx> > CC: Grant Likely <grant.likely@xxxxxxxxxx> > CC: Rob Herring <robh+dt@xxxxxxxxxx> > CC: Mohit Kumar <mohit.kumar@xxxxxx> > CC: Jingoo Han <jg1.han@xxxxxxxxxxx> > CC: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> > CC: Pratyush Anand <pratyush.anand@xxxxxx> > CC: Richard Zhu <r65037@xxxxxxxxxxxxx> > CC: Kishon Vijay Abraham I <kishon@xxxxxx> > CC: Marek Vasut <marex@xxxxxxx> > CC: Arnd Bergmann <arnd@xxxxxxxx> > CC: Pawel Moll <pawel.moll@xxxxxxx> > CC: Mark Rutland <mark.rutland@xxxxxxx> > CC: Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx> > CC: Kumar Gala <galak@xxxxxxxxxxxxxx> > CC: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> > CC: Grant Likely <grant.likely@xxxxxxxxxx> > > --- > drivers/pci/host/pcie-designware.c | 27 +++++++++++++++++---------- > drivers/pci/host/pcie-designware.h | 16 ++++++++++++++++ > 2 files changed, 33 insertions(+), 10 deletions(-) > > diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie- > designware.c > index e4bd19a..f985811 100644 > --- a/drivers/pci/host/pcie-designware.c > +++ b/drivers/pci/host/pcie-designware.c > @@ -277,11 +277,15 @@ static int assign_irq(int no_irqs, struct msi_desc > *desc, int *pos) > } > set_bit(pos0 + i, pp->msi_irq_in_use); > /*Enable corresponding interrupt in MSI interrupt controller > */ > - res = ((pos0 + i) / 32) * 12; > - bit = (pos0 + i) % 32; > - dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, > 4, &val); > - val |= 1 << bit; > - dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, > 4, val); > + if (!(pp->version & DW_V3_65)) { > + res = ((pos0 + i) / 32) * 12; > + bit = (pos0 + i) % 32; > + dw_pcie_rd_own_conf(pp, > PCIE_MSI_INTR0_ENABLE + res, > + 4, &val); > + val |= 1 << bit; > + dw_pcie_wr_own_conf(pp, > PCIE_MSI_INTR0_ENABLE + res, > + 4, val); > + } > } > > *pos = pos0; > @@ -349,7 +353,10 @@ static int dw_msi_setup_irq(struct msi_chip *chip, > struct pci_dev *pdev, > */ > desc->msi_attrib.multiple = msgvec; > > - msg.address_lo = virt_to_phys((void *)pp->msi_data); > + if (pp->ops->get_msi_data) > + msg.address_lo = pp->ops->get_msi_data(pp); > + else > + msg.address_lo = virt_to_phys((void *)pp->msi_data); > msg.address_hi = 0x0; > msg.data = pos; > write_msi_msg(irq, &msg); > @@ -768,7 +775,7 @@ static struct pci_ops dw_pcie_ops = { > .write = dw_pcie_wr_conf, > }; > > -static int dw_pcie_setup(int nr, struct pci_sys_data *sys) > +int dw_pcie_setup(int nr, struct pci_sys_data *sys) > { > struct pcie_port *pp; > > @@ -791,7 +798,7 @@ static int dw_pcie_setup(int nr, struct pci_sys_data > *sys) > return 1; > } > > -static struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys) > +struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys) > { > struct pci_bus *bus; > struct pcie_port *pp = sys_to_pcie(sys); @@ -808,7 +815,7 @@ static > struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys) > return bus; > } > > -static int dw_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) > +int dw_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) > { > struct pcie_port *pp = sys_to_pcie(dev->bus->sysdata); > int irq; > @@ -820,7 +827,7 @@ static int dw_pcie_map_irq(const struct pci_dev > *dev, u8 slot, u8 pin) > return irq; > } > > -static void dw_pcie_add_bus(struct pci_bus *bus) > +void dw_pcie_add_bus(struct pci_bus *bus) > { > if (IS_ENABLED(CONFIG_PCI_MSI)) { > struct pcie_port *pp = sys_to_pcie(bus->sysdata); diff --git > a/drivers/pci/host/pcie-designware.h b/drivers/pci/host/pcie-designware.h > index 2d6dd66..3a6a6eb 100644 > --- a/drivers/pci/host/pcie-designware.h > +++ b/drivers/pci/host/pcie-designware.h > @@ -39,6 +39,12 @@ struct pcie_port { > void __iomem *va_cfg0_base; > u64 cfg1_base; > void __iomem *va_cfg1_base; > + /* > + * v3.65 DW hw implements application register space for > + * MSI and has no ATU view port > + */ > +#define DW_V3_65 BIT(0) > + u32 version; > u64 io_base; > u64 mem_base; > spinlock_t conf_lock; > @@ -68,6 +74,7 @@ struct pcie_host_ops { > unsigned int devfn, int where, int size, u32 val); > int (*link_up)(struct pcie_port *pp); > void (*host_init)(struct pcie_port *pp); > + u32 (*get_msi_data)(struct pcie_port *pp); > }; > > int dw_pcie_cfg_read(void __iomem *addr, int where, int size, u32 *val); > @@ -77,5 +84,14 @@ void dw_pcie_msi_init(struct pcie_port *pp); int > dw_pcie_link_up(struct pcie_port *pp); void dw_pcie_setup_rc(struct > pcie_port *pp); int dw_pcie_host_init(struct pcie_port *pp); > +int dw_pcie_setup(int nr, struct pci_sys_data *sys); struct pci_bus > +*dw_pcie_scan_bus(int nr, struct pci_sys_data *sys); void > +dw_pcie_add_bus(struct pci_bus *bus); int > dw_pcie_parse_resource(struct > +pcie_port *pp); > > +/* internal to DW common core driver */ int > +dw_pcie_common_host_init(struct pcie_port *pp, struct hw_pci *hw); int > +dw_pcie_msi_host_init(struct pcie_port *pp, struct device_node *np, > + const struct irq_domain_ops *irq_ops); int > dw_pcie_map_irq(const > +struct pci_dev *dev, u8 slot, u8 pin); > #endif /* _PCIE_DESIGNWARE_H */ > -- > 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
