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Message-ID: <20190902162608.GP9720@e119886-lin.cambridge.arm.com>
Date: Mon, 2 Sep 2019 17:26:08 +0100
From: Andrew Murray <andrew.murray@....com>
To: Xiaowei Bao <xiaowei.bao@....com>
Cc: robh+dt@...nel.org, mark.rutland@....com, shawnguo@...nel.org,
leoyang.li@....com, kishon@...com, lorenzo.pieralisi@....com,
minghuan.Lian@....com, mingkai.hu@....com, roy.zang@....com,
jingoohan1@...il.com, gustavo.pimentel@...opsys.com,
linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linuxppc-dev@...ts.ozlabs.org, gregkh@...uxfoundation.org,
zhiqiang.hou@....com, arnd@...db.de
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.
> config space.
>
> Signed-off-by: Xiaowei Bao <xiaowei.bao@....com>
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).
I'm keen to hear feedback from Jingoo/Gustavo on this.
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
>
>
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> linux-arm-kernel@...ts.infradead.org
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