RE: [PATCH v3 01/11] PCI: designware-ep: Add multiple PFs support for DWC

From: Xiaowei Bao
Date: Mon Sep 02 2019 - 23:47:24 EST

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> -----Original Message-----
> From: Andrew Murray <andrew.murray@xxxxxxx>
> Sent: 2019年9月3日 0:26
> To: Xiaowei Bao <xiaowei.bao@xxxxxxx>
> Cc: robh+dt@xxxxxxxxxx; mark.rutland@xxxxxxx; shawnguo@xxxxxxxxxx; Leo
> Li <leoyang.li@xxxxxxx>; kishon@xxxxxx; lorenzo.pieralisi@xxxxxxx; M.h.
> Lian <minghuan.lian@xxxxxxx>; Mingkai Hu <mingkai.hu@xxxxxxx>; Roy
> Zang <roy.zang@xxxxxxx>; jingoohan1@xxxxxxxxx;
> gustavo.pimentel@xxxxxxxxxxxx; linux-pci@xxxxxxxxxxxxxxx;
> devicetree@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; linuxppc-dev@xxxxxxxxxxxxxxxx;
> gregkh@xxxxxxxxxxxxxxxxxxx; Z.q. Hou <zhiqiang.hou@xxxxxxx>;
> arnd@xxxxxxxx
> Subject: Re: [PATCH v3 01/11] PCI: designware-ep: Add multiple PFs support
> for DWC
>
> On Mon, Sep 02, 2019 at 11:17:06AM +0800, Xiaowei Bao wrote:
> > Add multiple PFs support for DWC, different PF have different config
> > space we use pf-offset property which get from the DTS to access the
> > different pF
>
> This needs to be updated as this no longer comes from the DT.

Yes, thanks

Thanks
Xiaowei

>
> > config space.
> >
> > Signed-off-by: Xiaowei Bao <xiaowei.bao@xxxxxxx>
>
>
> We're assuming:
>
> - The offset address (func_offset) between PF's in the memory map can be
> different between different DWC implementations. And also that it's
> possible for DWC implementations to address PFs without using an offset.
>
> - The current approach is preferable to adding DWC EP driver callbacks
> for writing to the EP config space (e.g. a variant of dw_pcie_writew_dbi
> that takes a func number).

Even if use the a variant of dw_pcie_writew_dbi, we also need a offset value form
different platform, due to the different platform may be have different implement
about this, so I am not sure how to implement the variant of dw_pcie_writew_dbi?

>
> I'm keen to hear feedback from Jingoo/Gustavo on this.

OK, expect the feedback.

Thanks
Xiaowei

>
> Thanks,
>
> Andrew Murray
>
> > ---
> > v2:
> > - Remove duplicate redundant code.
> > - Reimplement the PF config space access way.
> > v3:
> > - Integrate duplicate code for func_select.
> > - Move PCIE_ATU_FUNC_NUM(pf) (pf << 20) to ((pf) << 20).
> > - Add the comments for func_conf_select function.
> >
> > drivers/pci/controller/dwc/pcie-designware-ep.c | 123
> ++++++++++++++++--------
> > drivers/pci/controller/dwc/pcie-designware.c | 59 ++++++++----
> > drivers/pci/controller/dwc/pcie-designware.h | 18 +++-
> > 3 files changed, 142 insertions(+), 58 deletions(-)
> >
> > diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c
> > b/drivers/pci/controller/dwc/pcie-designware-ep.c
> > index 65f4792..eb851c2 100644
> > --- a/drivers/pci/controller/dwc/pcie-designware-ep.c
> > +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
> > @@ -19,12 +19,26 @@ void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
> > pci_epc_linkup(epc);
> > }
> >
> > -static void __dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno
> bar,
> > - int flags)
> > +static unsigned int dw_pcie_ep_func_select(struct dw_pcie_ep *ep, u8
> > +func_no) {
> > + unsigned int func_offset = 0;
> > +
> > + if (ep->ops->func_conf_select)
> > + func_offset = ep->ops->func_conf_select(ep, func_no);
> > +
> > + return func_offset;
> > +}
> > +
> > +static void __dw_pcie_ep_reset_bar(struct dw_pcie *pci, u8 func_no,
> > + enum pci_barno bar, int flags)
> > {
> > u32 reg;
> > + unsigned int func_offset = 0;
> > + struct dw_pcie_ep *ep = &pci->ep;
> > +
> > + func_offset = dw_pcie_ep_func_select(ep, func_no);
> >
> > - reg = PCI_BASE_ADDRESS_0 + (4 * bar);
> > + reg = func_offset + PCI_BASE_ADDRESS_0 + (4 * bar);
> > dw_pcie_dbi_ro_wr_en(pci);
> > dw_pcie_writel_dbi2(pci, reg, 0x0);
> > dw_pcie_writel_dbi(pci, reg, 0x0);
> > @@ -37,7 +51,12 @@ static void __dw_pcie_ep_reset_bar(struct dw_pcie
> > *pci, enum pci_barno bar,
> >
> > void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar) {
> > - __dw_pcie_ep_reset_bar(pci, bar, 0);
> > + u8 func_no, funcs;
> > +
> > + funcs = pci->ep.epc->max_functions;
> > +
> > + for (func_no = 0; func_no < funcs; func_no++)
> > + __dw_pcie_ep_reset_bar(pci, func_no, bar, 0);
> > }
> >
> > static int dw_pcie_ep_write_header(struct pci_epc *epc, u8 func_no,
> > @@ -45,28 +64,31 @@ static int dw_pcie_ep_write_header(struct pci_epc
> > *epc, u8 func_no, {
> > struct dw_pcie_ep *ep = epc_get_drvdata(epc);
> > struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> > + unsigned int func_offset = 0;
> > +
> > + func_offset = dw_pcie_ep_func_select(ep, func_no);
> >
> > dw_pcie_dbi_ro_wr_en(pci);
> > - dw_pcie_writew_dbi(pci, PCI_VENDOR_ID, hdr->vendorid);
> > - dw_pcie_writew_dbi(pci, PCI_DEVICE_ID, hdr->deviceid);
> > - dw_pcie_writeb_dbi(pci, PCI_REVISION_ID, hdr->revid);
> > - dw_pcie_writeb_dbi(pci, PCI_CLASS_PROG, hdr->progif_code);
> > - dw_pcie_writew_dbi(pci, PCI_CLASS_DEVICE,
> > + dw_pcie_writew_dbi(pci, func_offset + PCI_VENDOR_ID, hdr->vendorid);
> > + dw_pcie_writew_dbi(pci, func_offset + PCI_DEVICE_ID, hdr->deviceid);
> > + dw_pcie_writeb_dbi(pci, func_offset + PCI_REVISION_ID, hdr->revid);
> > + dw_pcie_writeb_dbi(pci, func_offset + PCI_CLASS_PROG,
> hdr->progif_code);
> > + dw_pcie_writew_dbi(pci, func_offset + PCI_CLASS_DEVICE,
> > hdr->subclass_code | hdr->baseclass_code << 8);
> > - dw_pcie_writeb_dbi(pci, PCI_CACHE_LINE_SIZE,
> > + dw_pcie_writeb_dbi(pci, func_offset + PCI_CACHE_LINE_SIZE,
> > hdr->cache_line_size);
> > - dw_pcie_writew_dbi(pci, PCI_SUBSYSTEM_VENDOR_ID,
> > + dw_pcie_writew_dbi(pci, func_offset + PCI_SUBSYSTEM_VENDOR_ID,
> > hdr->subsys_vendor_id);
> > - dw_pcie_writew_dbi(pci, PCI_SUBSYSTEM_ID, hdr->subsys_id);
> > - dw_pcie_writeb_dbi(pci, PCI_INTERRUPT_PIN,
> > + dw_pcie_writew_dbi(pci, func_offset + PCI_SUBSYSTEM_ID,
> hdr->subsys_id);
> > + dw_pcie_writeb_dbi(pci, func_offset + PCI_INTERRUPT_PIN,
> > hdr->interrupt_pin);
> > dw_pcie_dbi_ro_wr_dis(pci);
> >
> > return 0;
> > }
> >
> > -static int dw_pcie_ep_inbound_atu(struct dw_pcie_ep *ep, enum
> pci_barno bar,
> > - dma_addr_t cpu_addr,
> > +static int dw_pcie_ep_inbound_atu(struct dw_pcie_ep *ep, u8 func_no,
> > + enum pci_barno bar, dma_addr_t cpu_addr,
> > enum dw_pcie_as_type as_type)
> > {
> > int ret;
> > @@ -79,7 +101,7 @@ static int dw_pcie_ep_inbound_atu(struct
> dw_pcie_ep *ep, enum pci_barno bar,
> > return -EINVAL;
> > }
> >
> > - ret = dw_pcie_prog_inbound_atu(pci, free_win, bar, cpu_addr,
> > + ret = dw_pcie_prog_inbound_atu(pci, func_no, free_win, bar,
> > +cpu_addr,
> > as_type);
> > if (ret < 0) {
> > dev_err(pci->dev, "Failed to program IB window\n"); @@ -92,7
> +114,8
> > @@ static int dw_pcie_ep_inbound_atu(struct dw_pcie_ep *ep, enum
> pci_barno bar,
> > return 0;
> > }
> >
> > -static int dw_pcie_ep_outbound_atu(struct dw_pcie_ep *ep, phys_addr_t
> > phys_addr,
> > +static int dw_pcie_ep_outbound_atu(struct dw_pcie_ep *ep, u8 func_no,
> > + phys_addr_t phys_addr,
> > u64 pci_addr, size_t size)
> > {
> > u32 free_win;
> > @@ -104,8 +127,8 @@ static int dw_pcie_ep_outbound_atu(struct
> dw_pcie_ep *ep, phys_addr_t phys_addr,
> > return -EINVAL;
> > }
> >
> > - dw_pcie_prog_outbound_atu(pci, free_win, PCIE_ATU_TYPE_MEM,
> > - phys_addr, pci_addr, size);
> > + dw_pcie_prog_ep_outbound_atu(pci, func_no, free_win,
> PCIE_ATU_TYPE_MEM,
> > + phys_addr, pci_addr, size);
> >
> > set_bit(free_win, ep->ob_window_map);
> > ep->outbound_addr[free_win] = phys_addr; @@ -121,7 +144,7 @@
> static
> > void dw_pcie_ep_clear_bar(struct pci_epc *epc, u8 func_no,
> > enum pci_barno bar = epf_bar->barno;
> > u32 atu_index = ep->bar_to_atu[bar];
> >
> > - __dw_pcie_ep_reset_bar(pci, bar, epf_bar->flags);
> > + __dw_pcie_ep_reset_bar(pci, func_no, bar, epf_bar->flags);
> >
> > dw_pcie_disable_atu(pci, atu_index, DW_PCIE_REGION_INBOUND);
> > clear_bit(atu_index, ep->ib_window_map); @@ -137,14 +160,20 @@
> > static int dw_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no,
> > size_t size = epf_bar->size;
> > int flags = epf_bar->flags;
> > enum dw_pcie_as_type as_type;
> > - u32 reg = PCI_BASE_ADDRESS_0 + (4 * bar);
> > + u32 reg;
> > + unsigned int func_offset = 0;
> > +
> > + func_offset = dw_pcie_ep_func_select(ep, func_no);
> > +
> > + reg = PCI_BASE_ADDRESS_0 + (4 * bar) + func_offset;
> >
> > if (!(flags & PCI_BASE_ADDRESS_SPACE))
> > as_type = DW_PCIE_AS_MEM;
> > else
> > as_type = DW_PCIE_AS_IO;
> >
> > - ret = dw_pcie_ep_inbound_atu(ep, bar, epf_bar->phys_addr, as_type);
> > + ret = dw_pcie_ep_inbound_atu(ep, func_no, bar,
> > + epf_bar->phys_addr, as_type);
> > if (ret)
> > return ret;
> >
> > @@ -202,7 +231,7 @@ static int dw_pcie_ep_map_addr(struct pci_epc
> *epc, u8 func_no,
> > struct dw_pcie_ep *ep = epc_get_drvdata(epc);
> > struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> >
> > - ret = dw_pcie_ep_outbound_atu(ep, addr, pci_addr, size);
> > + ret = dw_pcie_ep_outbound_atu(ep, func_no, addr, pci_addr, size);
> > if (ret) {
> > dev_err(pci->dev, "Failed to enable address\n");
> > return ret;
> > @@ -216,11 +245,14 @@ static int dw_pcie_ep_get_msi(struct pci_epc
> *epc, u8 func_no)
> > struct dw_pcie_ep *ep = epc_get_drvdata(epc);
> > struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> > u32 val, reg;
> > + unsigned int func_offset = 0;
> >
> > if (!ep->msi_cap)
> > return -EINVAL;
> >
> > - reg = ep->msi_cap + PCI_MSI_FLAGS;
> > + func_offset = dw_pcie_ep_func_select(ep, func_no);
> > +
> > + reg = ep->msi_cap + func_offset + PCI_MSI_FLAGS;
> > val = dw_pcie_readw_dbi(pci, reg);
> > if (!(val & PCI_MSI_FLAGS_ENABLE))
> > return -EINVAL;
> > @@ -235,11 +267,14 @@ static int dw_pcie_ep_set_msi(struct pci_epc
> *epc, u8 func_no, u8 interrupts)
> > struct dw_pcie_ep *ep = epc_get_drvdata(epc);
> > struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> > u32 val, reg;
> > + unsigned int func_offset = 0;
> >
> > if (!ep->msi_cap)
> > return -EINVAL;
> >
> > - reg = ep->msi_cap + PCI_MSI_FLAGS;
> > + func_offset = dw_pcie_ep_func_select(ep, func_no);
> > +
> > + reg = ep->msi_cap + func_offset + PCI_MSI_FLAGS;
> > val = dw_pcie_readw_dbi(pci, reg);
> > val &= ~PCI_MSI_FLAGS_QMASK;
> > val |= (interrupts << 1) & PCI_MSI_FLAGS_QMASK; @@ -255,11 +290,14
> > @@ static int dw_pcie_ep_get_msix(struct pci_epc *epc, u8 func_no)
> > struct dw_pcie_ep *ep = epc_get_drvdata(epc);
> > struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> > u32 val, reg;
> > + unsigned int func_offset = 0;
> >
> > if (!ep->msix_cap)
> > return -EINVAL;
> >
> > - reg = ep->msix_cap + PCI_MSIX_FLAGS;
> > + func_offset = dw_pcie_ep_func_select(ep, func_no);
> > +
> > + reg = ep->msix_cap + func_offset + PCI_MSIX_FLAGS;
> > val = dw_pcie_readw_dbi(pci, reg);
> > if (!(val & PCI_MSIX_FLAGS_ENABLE))
> > return -EINVAL;
> > @@ -274,11 +312,14 @@ static int dw_pcie_ep_set_msix(struct pci_epc
> *epc, u8 func_no, u16 interrupts)
> > struct dw_pcie_ep *ep = epc_get_drvdata(epc);
> > struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> > u32 val, reg;
> > + unsigned int func_offset = 0;
> >
> > if (!ep->msix_cap)
> > return -EINVAL;
> >
> > - reg = ep->msix_cap + PCI_MSIX_FLAGS;
> > + func_offset = dw_pcie_ep_func_select(ep, func_no);
> > +
> > + reg = ep->msix_cap + func_offset + PCI_MSIX_FLAGS;
> > val = dw_pcie_readw_dbi(pci, reg);
> > val &= ~PCI_MSIX_FLAGS_QSIZE;
> > val |= interrupts;
> > @@ -365,6 +406,7 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep
> *ep, u8 func_no,
> > struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> > struct pci_epc *epc = ep->epc;
> > unsigned int aligned_offset;
> > + unsigned int func_offset = 0;
> > u16 msg_ctrl, msg_data;
> > u32 msg_addr_lower, msg_addr_upper, reg;
> > u64 msg_addr;
> > @@ -374,20 +416,22 @@ int dw_pcie_ep_raise_msi_irq(struct
> dw_pcie_ep *ep, u8 func_no,
> > if (!ep->msi_cap)
> > return -EINVAL;
> >
> > + func_offset = dw_pcie_ep_func_select(ep, func_no);
> > +
> > /* Raise MSI per the PCI Local Bus Specification Revision 3.0, 6.8.1. */
> > - reg = ep->msi_cap + PCI_MSI_FLAGS;
> > + reg = ep->msi_cap + func_offset + PCI_MSI_FLAGS;
> > msg_ctrl = dw_pcie_readw_dbi(pci, reg);
> > has_upper = !!(msg_ctrl & PCI_MSI_FLAGS_64BIT);
> > - reg = ep->msi_cap + PCI_MSI_ADDRESS_LO;
> > + reg = ep->msi_cap + func_offset + PCI_MSI_ADDRESS_LO;
> > msg_addr_lower = dw_pcie_readl_dbi(pci, reg);
> > if (has_upper) {
> > - reg = ep->msi_cap + PCI_MSI_ADDRESS_HI;
> > + reg = ep->msi_cap + func_offset + PCI_MSI_ADDRESS_HI;
> > msg_addr_upper = dw_pcie_readl_dbi(pci, reg);
> > - reg = ep->msi_cap + PCI_MSI_DATA_64;
> > + reg = ep->msi_cap + func_offset + PCI_MSI_DATA_64;
> > msg_data = dw_pcie_readw_dbi(pci, reg);
> > } else {
> > msg_addr_upper = 0;
> > - reg = ep->msi_cap + PCI_MSI_DATA_32;
> > + reg = ep->msi_cap + func_offset + PCI_MSI_DATA_32;
> > msg_data = dw_pcie_readw_dbi(pci, reg);
> > }
> > aligned_offset = msg_addr_lower & (epc->mem->page_size - 1); @@
> > -406,11 +450,12 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep,
> > u8 func_no, }
> >
> > int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
> > - u16 interrupt_num)
> > + u16 interrupt_num)
> > {
> > struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> > struct pci_epc *epc = ep->epc;
> > u16 tbl_offset, bir;
> > + unsigned int func_offset = 0;
> > u32 bar_addr_upper, bar_addr_lower;
> > u32 msg_addr_upper, msg_addr_lower;
> > u32 reg, msg_data, vec_ctrl;
> > @@ -418,12 +463,14 @@ int dw_pcie_ep_raise_msix_irq(struct
> dw_pcie_ep *ep, u8 func_no,
> > void __iomem *msix_tbl;
> > int ret;
> >
> > - reg = ep->msix_cap + PCI_MSIX_TABLE;
> > + func_offset = dw_pcie_ep_func_select(ep, func_no);
> > +
> > + reg = ep->msix_cap + func_offset + PCI_MSIX_TABLE;
> > tbl_offset = dw_pcie_readl_dbi(pci, reg);
> > bir = (tbl_offset & PCI_MSIX_TABLE_BIR);
> > tbl_offset &= PCI_MSIX_TABLE_OFFSET;
> >
> > - reg = PCI_BASE_ADDRESS_0 + (4 * bir);
> > + reg = PCI_BASE_ADDRESS_0 + func_offset + (4 * bir);
> > bar_addr_upper = 0;
> > bar_addr_lower = dw_pcie_readl_dbi(pci, reg);
> > reg_u64 = (bar_addr_lower & PCI_BASE_ADDRESS_MEM_TYPE_MASK);
> @@
> > -559,13 +606,13 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
> > ep->epc = epc;
> > epc_set_drvdata(epc, ep);
> >
> > - if (ep->ops->ep_init)
> > - ep->ops->ep_init(ep);
> > -
> > ret = of_property_read_u8(np, "max-functions", &epc->max_functions);
> > if (ret < 0)
> > epc->max_functions = 1;
> >
> > + if (ep->ops->ep_init)
> > + ep->ops->ep_init(ep);
> > +
> > ret = __pci_epc_mem_init(epc, ep->phys_base, ep->addr_size,
> > ep->page_size);
> > if (ret < 0) {
> > diff --git a/drivers/pci/controller/dwc/pcie-designware.c
> > b/drivers/pci/controller/dwc/pcie-designware.c
> > index 143cb6c..ede2e75 100644
> > --- a/drivers/pci/controller/dwc/pcie-designware.c
> > +++ b/drivers/pci/controller/dwc/pcie-designware.c
> > @@ -238,9 +238,10 @@ static void dw_pcie_writel_ob_unroll(struct
> dw_pcie *pci, u32 index, u32 reg,
> > dw_pcie_writel_atu(pci, offset + reg, val); }
> >
> > -static void dw_pcie_prog_outbound_atu_unroll(struct dw_pcie *pci, int
> index,
> > - int type, u64 cpu_addr,
> > - u64 pci_addr, u32 size)
> > +static void dw_pcie_prog_outbound_atu_unroll(struct dw_pcie *pci, u8
> func_no,
> > + int index, int type,
> > + u64 cpu_addr, u64 pci_addr,
> > + u32 size)
> > {
> > u32 retries, val;
> >
> > @@ -255,7 +256,7 @@ static void
> dw_pcie_prog_outbound_atu_unroll(struct dw_pcie *pci, int index,
> > dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_UPPER_TARGET,
> > upper_32_bits(pci_addr));
> > dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL1,
> > - type);
> > + type | PCIE_ATU_FUNC_NUM(func_no));
> > dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL2,
> > PCIE_ATU_ENABLE);
> >
> > @@ -274,8 +275,9 @@ static void
> dw_pcie_prog_outbound_atu_unroll(struct dw_pcie *pci, int index,
> > dev_err(pci->dev, "Outbound iATU is not being enabled\n"); }
> >
> > -void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, int type,
> > - u64 cpu_addr, u64 pci_addr, u32 size)
> > +static void __dw_pcie_prog_outbound_atu(struct dw_pcie *pci, u8
> func_no,
> > + int index, int type, u64 cpu_addr,
> > + u64 pci_addr, u32 size)
> > {
> > u32 retries, val;
> >
> > @@ -283,8 +285,8 @@ void dw_pcie_prog_outbound_atu(struct dw_pcie
> *pci, int index, int type,
> > cpu_addr = pci->ops->cpu_addr_fixup(pci, cpu_addr);
> >
> > if (pci->iatu_unroll_enabled) {
> > - dw_pcie_prog_outbound_atu_unroll(pci, index, type, cpu_addr,
> > - pci_addr, size);
> > + dw_pcie_prog_outbound_atu_unroll(pci, func_no, index, type,
> > + cpu_addr, pci_addr, size);
> > return;
> > }
> >
> > @@ -300,7 +302,8 @@ void dw_pcie_prog_outbound_atu(struct dw_pcie
> *pci, int index, int type,
> > 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);
> > + dw_pcie_writel_dbi(pci, PCIE_ATU_CR1, type |
> > + PCIE_ATU_FUNC_NUM(func_no));
> > dw_pcie_writel_dbi(pci, PCIE_ATU_CR2, PCIE_ATU_ENABLE);
> >
> > /*
> > @@ -317,6 +320,21 @@ void dw_pcie_prog_outbound_atu(struct dw_pcie
> *pci, int index, int type,
> > dev_err(pci->dev, "Outbound iATU is not being enabled\n"); }
> >
> > +void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, int type,
> > + u64 cpu_addr, u64 pci_addr, u32 size) {
> > + __dw_pcie_prog_outbound_atu(pci, 0, index, type,
> > + cpu_addr, pci_addr, size);
> > +}
> > +
> > +void dw_pcie_prog_ep_outbound_atu(struct dw_pcie *pci, u8 func_no, int
> index,
> > + int type, u64 cpu_addr, u64 pci_addr,
> > + u32 size)
> > +{
> > + __dw_pcie_prog_outbound_atu(pci, func_no, index, type,
> > + cpu_addr, pci_addr, size);
> > +}
> > +
> > static u32 dw_pcie_readl_ib_unroll(struct dw_pcie *pci, u32 index,
> > u32 reg) {
> > u32 offset = PCIE_GET_ATU_INB_UNR_REG_OFFSET(index);
> > @@ -332,8 +350,8 @@ static void dw_pcie_writel_ib_unroll(struct dw_pcie
> *pci, u32 index, u32 reg,
> > dw_pcie_writel_atu(pci, offset + reg, val); }
> >
> > -static int dw_pcie_prog_inbound_atu_unroll(struct dw_pcie *pci, int index,
> > - int bar, u64 cpu_addr,
> > +static int dw_pcie_prog_inbound_atu_unroll(struct dw_pcie *pci, u8
> func_no,
> > + int index, int bar, u64 cpu_addr,
> > enum dw_pcie_as_type as_type) {
> > int type;
> > @@ -355,8 +373,10 @@ static int dw_pcie_prog_inbound_atu_unroll(struct
> dw_pcie *pci, int index,
> > return -EINVAL;
> > }
> >
> > - dw_pcie_writel_ib_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL1,
> type);
> > + dw_pcie_writel_ib_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL1,
> type |
> > + PCIE_ATU_FUNC_NUM(func_no));
> > dw_pcie_writel_ib_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL2,
> > + PCIE_ATU_FUNC_NUM_MATCH_EN |
> > PCIE_ATU_ENABLE |
> > PCIE_ATU_BAR_MODE_ENABLE | (bar << 8));
> >
> > @@ -377,14 +397,15 @@ static int
> dw_pcie_prog_inbound_atu_unroll(struct dw_pcie *pci, int index,
> > return -EBUSY;
> > }
> >
> > -int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, int index, int bar,
> > - u64 cpu_addr, enum dw_pcie_as_type as_type)
> > +int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, u8 func_no, int index,
> > + int bar, u64 cpu_addr,
> > + enum dw_pcie_as_type as_type)
> > {
> > int type;
> > u32 retries, val;
> >
> > if (pci->iatu_unroll_enabled)
> > - return dw_pcie_prog_inbound_atu_unroll(pci, index, bar,
> > + return dw_pcie_prog_inbound_atu_unroll(pci, func_no, index, bar,
> > cpu_addr, as_type);
> >
> > dw_pcie_writel_dbi(pci, PCIE_ATU_VIEWPORT,
> PCIE_ATU_REGION_INBOUND |
> > @@ -403,9 +424,11 @@ int dw_pcie_prog_inbound_atu(struct dw_pcie
> *pci, int index, int bar,
> > return -EINVAL;
> > }
> >
> > - dw_pcie_writel_dbi(pci, PCIE_ATU_CR1, type);
> > - dw_pcie_writel_dbi(pci, PCIE_ATU_CR2, PCIE_ATU_ENABLE
> > - | PCIE_ATU_BAR_MODE_ENABLE | (bar << 8));
> > + dw_pcie_writel_dbi(pci, PCIE_ATU_CR1, type |
> > + PCIE_ATU_FUNC_NUM(func_no));
> > + dw_pcie_writel_dbi(pci, PCIE_ATU_CR2, PCIE_ATU_ENABLE |
> > + PCIE_ATU_FUNC_NUM_MATCH_EN |
> > + PCIE_ATU_BAR_MODE_ENABLE | (bar << 8));
> >
> > /*
> > * Make sure ATU enable takes effect before any subsequent config
> > diff --git a/drivers/pci/controller/dwc/pcie-designware.h
> > b/drivers/pci/controller/dwc/pcie-designware.h
> > index 5a18e94..6aca0bb 100644
> > --- a/drivers/pci/controller/dwc/pcie-designware.h
> > +++ b/drivers/pci/controller/dwc/pcie-designware.h
> > @@ -71,9 +71,11 @@
> > #define PCIE_ATU_TYPE_IO 0x2
> > #define PCIE_ATU_TYPE_CFG0 0x4
> > #define PCIE_ATU_TYPE_CFG1 0x5
> > +#define PCIE_ATU_FUNC_NUM(pf) ((pf) << 20)
> > #define PCIE_ATU_CR2 0x908
> > #define PCIE_ATU_ENABLE BIT(31)
> > #define PCIE_ATU_BAR_MODE_ENABLE BIT(30)
> > +#define PCIE_ATU_FUNC_NUM_MATCH_EN BIT(19)
> > #define PCIE_ATU_LOWER_BASE 0x90C
> > #define PCIE_ATU_UPPER_BASE 0x910
> > #define PCIE_ATU_LIMIT 0x914
> > @@ -206,6 +208,14 @@ struct dw_pcie_ep_ops {
> > int (*raise_irq)(struct dw_pcie_ep *ep, u8 func_no,
> > enum pci_epc_irq_type type, u16 interrupt_num);
> > const struct pci_epc_features* (*get_features)(struct dw_pcie_ep
> > *ep);
> > + /*
> > + * Provide a method to implement the different func config space
> > + * access for different platform, if different func have different
> > + * offset, return the offset of func. if use write a register way
> > + * return a 0, and implement code in callback function of platform
> > + * driver.
> > + */
> > + unsigned int (*func_conf_select)(struct dw_pcie_ep *ep, u8 func_no);
> > };
> >
> > struct dw_pcie_ep {
> > @@ -277,8 +287,12 @@ int dw_pcie_wait_for_link(struct dw_pcie *pci);
> > void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
> > int type, u64 cpu_addr, u64 pci_addr,
> > u32 size);
> > -int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, int index, int bar,
> > - u64 cpu_addr, enum dw_pcie_as_type as_type);
> > +void dw_pcie_prog_ep_outbound_atu(struct dw_pcie *pci, u8 func_no, int
> index,
> > + int type, u64 cpu_addr, u64 pci_addr,
> > + u32 size);
> > +int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, u8 func_no, int index,
> > + int bar, u64 cpu_addr,
> > + enum dw_pcie_as_type as_type);
> > void dw_pcie_disable_atu(struct dw_pcie *pci, int index,
> > enum dw_pcie_region_type type);
> > void dw_pcie_setup(struct dw_pcie *pci);
> > --
> > 2.9.5
> >
> >
> > _______________________________________________
> > linux-arm-kernel mailing list
> > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
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> > .infradead.org%2Fmailman%2Flistinfo%2Flinux-arm-kernel&data=02%
> 7C0
> >
> 1%7Cxiaowei.bao%40nxp.com%7C99eef14a525040ed3eab08d72fc244f1%7C
> 686ea1d
> >
> 3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637030383769341270&sd
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> > %2FJYCjWErvbUM%2FT%2BoVMANMwyLRI4gVRssdnd04w%3D&reser
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