[PATCH 3/3] PCI: dwc: Add dw_pcie_ep_{read,write}_dbi[2] helpers
Serge Semin
fancer.lancer at gmail.com
Mon Nov 13 23:41:23 AEDT 2023
On Mon, Nov 13, 2023 at 10:33:00AM +0900, Yoshihiro Shimoda wrote:
> The current code calculated some dbi[2] registers' offset by calling
> dw_pcie_ep_get_dbi[2]_offset() in each function. To improve code
> readability, add dw_pcie_ep_{read,write}_dbi[2} and some data-width
> related helpers.
Thanks for submitting this cleanup patch. That's exactly what I meant
here
https://lore.kernel.org/linux-pci/j4g4ijnxd7qyacszlwyi3tdztkw2nmnjwyhdqf2l2yj3h2mvje@iqsrqiodqbhq/
and Mani later here
https://lore.kernel.org/linux-pci/20230728023444.GA4433@thinkpad/
Please note a few nitpicks below.
>
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh at renesas.com>
> ---
> .../pci/controller/dwc/pcie-designware-ep.c | 230 ++++++++++--------
> 1 file changed, 129 insertions(+), 101 deletions(-)
>
> diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
> index 1100671db887..dcbed49c9613 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-ep.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
> @@ -65,24 +65,89 @@ static unsigned int dw_pcie_ep_get_dbi2_offset(struct dw_pcie_ep *ep, u8 func_no
> return dbi2_offset;
> }
>
> +static u32 dw_pcie_ep_read_dbi(struct dw_pcie_ep *ep, u8 func_no, u32 reg,
> + size_t size)
> +{
> + unsigned int offset = dw_pcie_ep_get_dbi_offset(ep, func_no);
> + struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> +
> + return dw_pcie_read_dbi(pci, offset + reg, size);
> +}
> +
> +static void dw_pcie_ep_write_dbi(struct dw_pcie_ep *ep, u8 func_no, u32 reg,
> + size_t size, u32 val)
> +{
> + unsigned int offset = dw_pcie_ep_get_dbi_offset(ep, func_no);
> + struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> +
> + dw_pcie_write_dbi(pci, offset + reg, size, val);
> +}
> +
> +static void dw_pcie_ep_write_dbi2(struct dw_pcie_ep *ep, u8 func_no, u32 reg,
> + size_t size, u32 val)
> +{
> + unsigned int offset = dw_pcie_ep_get_dbi2_offset(ep, func_no);
> + struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> +
> + dw_pcie_write_dbi2(pci, offset + reg, size, val);
> +}
> +
> +static inline void dw_pcie_ep_writel_dbi(struct dw_pcie_ep *ep, u8 func_no,
> + u32 reg, u32 val)
> +{
> + dw_pcie_ep_write_dbi(ep, func_no, reg, 0x4, val);
> +}
> +
> +static inline u32 dw_pcie_ep_readl_dbi(struct dw_pcie_ep *ep, u8 func_no,
> + u32 reg)
> +{
> + return dw_pcie_ep_read_dbi(ep, func_no, reg, 0x4);
> +}
> +
> +static inline void dw_pcie_ep_writew_dbi(struct dw_pcie_ep *ep, u8 func_no,
> + u32 reg, u16 val)
> +{
> + dw_pcie_ep_write_dbi(ep, func_no, reg, 0x2, val);
> +}
> +
> +static inline u16 dw_pcie_ep_readw_dbi(struct dw_pcie_ep *ep, u8 func_no,
> + u32 reg)
> +{
> + return dw_pcie_ep_read_dbi(ep, func_no, reg, 0x2);
> +}
> +
> +static inline void dw_pcie_ep_writeb_dbi(struct dw_pcie_ep *ep, u8 func_no,
> + u32 reg, u8 val)
> +{
> + dw_pcie_ep_write_dbi(ep, func_no, reg, 0x1, val);
> +}
> +
> +static inline u8 dw_pcie_ep_readb_dbi(struct dw_pcie_ep *ep, u8 func_no,
> + u32 reg)
> +{
> + return dw_pcie_ep_read_dbi(ep, func_no, reg, 0x1);
> +}
> +
> +static inline void dw_pcie_ep_writel_dbi2(struct dw_pcie_ep *ep, u8 func_no,
> + u32 reg, u32 val)
> +{
> + dw_pcie_ep_write_dbi2(ep, func_no, reg, 0x4, val);
> +}
> +
I am not sure whether the methods above are supposed to be defined
here instead of being moved to the "pcie-designware.h" header file
together with dw_pcie_ep_get_dbi2_offset() and
dw_pcie_ep_get_dbi_offset(). The later place seems more suitable
seeing the accessors are generic, look similar to the
dw_pcie_{write,read}_dbi{,2}() functions and might be useful in the
platform drivers. On the other hand no LLDDs would have used it
currently. So I'll leave this as a food for thoughts for the driver
and subsystem maintainers.
> static void __dw_pcie_ep_reset_bar(struct dw_pcie *pci, u8 func_no,
> enum pci_barno bar, int flags)
> {
> - unsigned int dbi_offset, dbi2_offset;
> struct dw_pcie_ep *ep = &pci->ep;
> u32 reg, reg_dbi2;
>
> - dbi_offset = dw_pcie_ep_get_dbi_offset(ep, func_no);
> - dbi2_offset = dw_pcie_ep_get_dbi2_offset(ep, func_no);
> -
> - reg = dbi_offset + PCI_BASE_ADDRESS_0 + (4 * bar);
> - reg_dbi2 = dbi2_offset + PCI_BASE_ADDRESS_0 + (4 * bar);
> + reg = PCI_BASE_ADDRESS_0 + (4 * bar);
> + reg_dbi2 = PCI_BASE_ADDRESS_0 + (4 * bar);
Semantics of the both variables is identical, could you please drop
"reg_dbi2" and just use the "reg" variable instead here? You must have
just missed it because a similar change is done in the rest of the
places in this patch.
> dw_pcie_dbi_ro_wr_en(pci);
> - dw_pcie_writel_dbi2(pci, reg_dbi2, 0x0);
> - dw_pcie_writel_dbi(pci, reg, 0x0);
> + dw_pcie_ep_writel_dbi2(ep, func_no, reg_dbi2, 0x0);
> + dw_pcie_ep_writel_dbi(ep, func_no, reg, 0x0);
> if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) {
> - dw_pcie_writel_dbi2(pci, reg_dbi2 + 4, 0x0);
> - dw_pcie_writel_dbi(pci, reg + 4, 0x0);
> + dw_pcie_ep_writel_dbi2(ep, func_no, reg_dbi2 + 4, 0x0);
> + dw_pcie_ep_writel_dbi(ep, func_no, reg + 4, 0x0);
> }
> dw_pcie_dbi_ro_wr_dis(pci);
> }
> @@ -99,19 +164,15 @@ void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
> EXPORT_SYMBOL_GPL(dw_pcie_ep_reset_bar);
>
> static u8 __dw_pcie_ep_find_next_cap(struct dw_pcie_ep *ep, u8 func_no,
> - u8 cap_ptr, u8 cap)
> + u8 cap_ptr, u8 cap)
> {
> - struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> - unsigned int dbi_offset = 0;
> u8 cap_id, next_cap_ptr;
> u16 reg;
>
> if (!cap_ptr)
> return 0;
>
> - dbi_offset = dw_pcie_ep_get_dbi_offset(ep, func_no);
> -
> - reg = dw_pcie_readw_dbi(pci, dbi_offset + cap_ptr);
> + reg = dw_pcie_ep_readw_dbi(ep, func_no, cap_ptr);
> cap_id = (reg & 0x00ff);
>
> if (cap_id > PCI_CAP_ID_MAX)
> @@ -126,14 +187,10 @@ static u8 __dw_pcie_ep_find_next_cap(struct dw_pcie_ep *ep, u8 func_no,
>
> static u8 dw_pcie_ep_find_capability(struct dw_pcie_ep *ep, u8 func_no, u8 cap)
> {
> - struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> - unsigned int dbi_offset = 0;
> u8 next_cap_ptr;
> u16 reg;
>
> - dbi_offset = dw_pcie_ep_get_dbi_offset(ep, func_no);
> -
> - reg = dw_pcie_readw_dbi(pci, dbi_offset + PCI_CAPABILITY_LIST);
> + reg = dw_pcie_ep_readw_dbi(ep, func_no, PCI_CAPABILITY_LIST);
> next_cap_ptr = (reg & 0x00ff);
>
> return __dw_pcie_ep_find_next_cap(ep, func_no, next_cap_ptr, cap);
> @@ -144,24 +201,21 @@ static int dw_pcie_ep_write_header(struct pci_epc *epc, u8 func_no, u8 vfunc_no,
> {
> struct dw_pcie_ep *ep = epc_get_drvdata(epc);
> struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> - unsigned int dbi_offset = 0;
> -
> - dbi_offset = dw_pcie_ep_get_dbi_offset(ep, func_no);
>
> dw_pcie_dbi_ro_wr_en(pci);
> - dw_pcie_writew_dbi(pci, dbi_offset + PCI_VENDOR_ID, hdr->vendorid);
> - dw_pcie_writew_dbi(pci, dbi_offset + PCI_DEVICE_ID, hdr->deviceid);
> - dw_pcie_writeb_dbi(pci, dbi_offset + PCI_REVISION_ID, hdr->revid);
> - dw_pcie_writeb_dbi(pci, dbi_offset + PCI_CLASS_PROG, hdr->progif_code);
> - dw_pcie_writew_dbi(pci, dbi_offset + PCI_CLASS_DEVICE,
> - hdr->subclass_code | hdr->baseclass_code << 8);
> - dw_pcie_writeb_dbi(pci, dbi_offset + PCI_CACHE_LINE_SIZE,
> - hdr->cache_line_size);
> - dw_pcie_writew_dbi(pci, dbi_offset + PCI_SUBSYSTEM_VENDOR_ID,
> - hdr->subsys_vendor_id);
> - dw_pcie_writew_dbi(pci, dbi_offset + PCI_SUBSYSTEM_ID, hdr->subsys_id);
> - dw_pcie_writeb_dbi(pci, dbi_offset + PCI_INTERRUPT_PIN,
> - hdr->interrupt_pin);
> + dw_pcie_ep_writew_dbi(ep, func_no, PCI_VENDOR_ID, hdr->vendorid);
> + dw_pcie_ep_writew_dbi(ep, func_no, PCI_DEVICE_ID, hdr->deviceid);
> + dw_pcie_ep_writeb_dbi(ep, func_no, PCI_REVISION_ID, hdr->revid);
> + dw_pcie_ep_writeb_dbi(ep, func_no, PCI_CLASS_PROG, hdr->progif_code);
> + dw_pcie_ep_writew_dbi(ep, func_no, PCI_CLASS_DEVICE,
> + hdr->subclass_code | hdr->baseclass_code << 8);
> + dw_pcie_ep_writeb_dbi(ep, func_no, PCI_CACHE_LINE_SIZE,
> + hdr->cache_line_size);
> + dw_pcie_ep_writew_dbi(ep, func_no, PCI_SUBSYSTEM_VENDOR_ID,
> + hdr->subsys_vendor_id);
> + dw_pcie_ep_writew_dbi(ep, func_no, PCI_SUBSYSTEM_ID, hdr->subsys_id);
> + dw_pcie_ep_writeb_dbi(ep, func_no, PCI_INTERRUPT_PIN,
> + hdr->interrupt_pin);
> dw_pcie_dbi_ro_wr_dis(pci);
>
> return 0;
> @@ -243,18 +297,13 @@ static int dw_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no, u8 vfunc_no,
> {
> struct dw_pcie_ep *ep = epc_get_drvdata(epc);
> struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> - unsigned int dbi_offset, dbi2_offset;
> enum pci_barno bar = epf_bar->barno;
> size_t size = epf_bar->size;
> int flags = epf_bar->flags;
> - u32 reg, reg_dbi2;
> int ret, type;
> + u32 reg;
>
> - dbi_offset = dw_pcie_ep_get_dbi_offset(ep, func_no);
> - dbi2_offset = dw_pcie_ep_get_dbi2_offset(ep, func_no);
> -
> - reg = PCI_BASE_ADDRESS_0 + (4 * bar) + dbi_offset;
> - reg_dbi2 = PCI_BASE_ADDRESS_0 + (4 * bar) + dbi2_offset;
> + reg = PCI_BASE_ADDRESS_0 + (4 * bar);
>
> if (!(flags & PCI_BASE_ADDRESS_SPACE))
> type = PCIE_ATU_TYPE_MEM;
> @@ -270,12 +319,12 @@ static int dw_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no, u8 vfunc_no,
>
> dw_pcie_dbi_ro_wr_en(pci);
>
> - dw_pcie_writel_dbi2(pci, reg_dbi2, lower_32_bits(size - 1));
> - dw_pcie_writel_dbi(pci, reg, flags);
> + dw_pcie_ep_writel_dbi2(ep, func_no, reg, lower_32_bits(size - 1));
> + dw_pcie_ep_writel_dbi(ep, func_no, reg, flags);
>
> if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) {
> - dw_pcie_writel_dbi2(pci, reg_dbi2 + 4, upper_32_bits(size - 1));
> - dw_pcie_writel_dbi(pci, reg + 4, 0);
> + dw_pcie_ep_writel_dbi2(ep, func_no, reg + 4, upper_32_bits(size - 1));
> + dw_pcie_ep_writel_dbi(ep, func_no, reg + 4, 0);
> }
>
> ep->epf_bar[bar] = epf_bar;
> @@ -335,19 +384,15 @@ static int dw_pcie_ep_map_addr(struct pci_epc *epc, u8 func_no, u8 vfunc_no,
> static int dw_pcie_ep_get_msi(struct pci_epc *epc, u8 func_no, u8 vfunc_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 dbi_offset = 0;
> struct dw_pcie_ep_func *ep_func;
> + u32 val, reg;
Special kudos for preserving and adding the reversed xmas tree order
here and below. =)
-Serge(y)
>
> ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no);
> if (!ep_func || !ep_func->msi_cap)
> return -EINVAL;
>
> - dbi_offset = dw_pcie_ep_get_dbi_offset(ep, func_no);
> -
> - reg = ep_func->msi_cap + dbi_offset + PCI_MSI_FLAGS;
> - val = dw_pcie_readw_dbi(pci, reg);
> + reg = ep_func->msi_cap + PCI_MSI_FLAGS;
> + val = dw_pcie_ep_readw_dbi(ep, func_no, reg);
> if (!(val & PCI_MSI_FLAGS_ENABLE))
> return -EINVAL;
>
> @@ -361,22 +406,19 @@ static int dw_pcie_ep_set_msi(struct pci_epc *epc, u8 func_no, u8 vfunc_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 dbi_offset = 0;
> struct dw_pcie_ep_func *ep_func;
> + u32 val, reg;
>
> ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no);
> if (!ep_func || !ep_func->msi_cap)
> return -EINVAL;
>
> - dbi_offset = dw_pcie_ep_get_dbi_offset(ep, func_no);
> -
> - reg = ep_func->msi_cap + dbi_offset + PCI_MSI_FLAGS;
> - val = dw_pcie_readw_dbi(pci, reg);
> + reg = ep_func->msi_cap + PCI_MSI_FLAGS;
> + val = dw_pcie_ep_readw_dbi(ep, func_no, reg);
> val &= ~PCI_MSI_FLAGS_QMASK;
> val |= FIELD_PREP(PCI_MSI_FLAGS_QMASK, interrupts);
> dw_pcie_dbi_ro_wr_en(pci);
> - dw_pcie_writew_dbi(pci, reg, val);
> + dw_pcie_ep_writew_dbi(ep, func_no, reg, val);
> dw_pcie_dbi_ro_wr_dis(pci);
>
> return 0;
> @@ -385,19 +427,15 @@ static int dw_pcie_ep_set_msi(struct pci_epc *epc, u8 func_no, u8 vfunc_no,
> static int dw_pcie_ep_get_msix(struct pci_epc *epc, u8 func_no, u8 vfunc_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 dbi_offset = 0;
> struct dw_pcie_ep_func *ep_func;
> + u32 val, reg;
>
> ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no);
> if (!ep_func || !ep_func->msix_cap)
> return -EINVAL;
>
> - dbi_offset = dw_pcie_ep_get_dbi_offset(ep, func_no);
> -
> - reg = ep_func->msix_cap + dbi_offset + PCI_MSIX_FLAGS;
> - val = dw_pcie_readw_dbi(pci, reg);
> + reg = ep_func->msix_cap + PCI_MSIX_FLAGS;
> + val = dw_pcie_ep_readw_dbi(ep, func_no, reg);
> if (!(val & PCI_MSIX_FLAGS_ENABLE))
> return -EINVAL;
>
> @@ -411,9 +449,8 @@ static int dw_pcie_ep_set_msix(struct pci_epc *epc, u8 func_no, u8 vfunc_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 dbi_offset = 0;
> struct dw_pcie_ep_func *ep_func;
> + u32 val, reg;
>
> ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no);
> if (!ep_func || !ep_func->msix_cap)
> @@ -421,21 +458,19 @@ static int dw_pcie_ep_set_msix(struct pci_epc *epc, u8 func_no, u8 vfunc_no,
>
> dw_pcie_dbi_ro_wr_en(pci);
>
> - dbi_offset = dw_pcie_ep_get_dbi_offset(ep, func_no);
> -
> - reg = ep_func->msix_cap + dbi_offset + PCI_MSIX_FLAGS;
> - val = dw_pcie_readw_dbi(pci, reg);
> + reg = ep_func->msix_cap + PCI_MSIX_FLAGS;
> + val = dw_pcie_ep_readw_dbi(ep, func_no, reg);
> val &= ~PCI_MSIX_FLAGS_QSIZE;
> val |= interrupts;
> dw_pcie_writew_dbi(pci, reg, val);
>
> - reg = ep_func->msix_cap + dbi_offset + PCI_MSIX_TABLE;
> + reg = ep_func->msix_cap + PCI_MSIX_TABLE;
> val = offset | bir;
> - dw_pcie_writel_dbi(pci, reg, val);
> + dw_pcie_ep_writel_dbi(ep, func_no, reg, val);
>
> - reg = ep_func->msix_cap + dbi_offset + PCI_MSIX_PBA;
> + reg = ep_func->msix_cap + PCI_MSIX_PBA;
> val = (offset + (interrupts * PCI_MSIX_ENTRY_SIZE)) | bir;
> - dw_pcie_writel_dbi(pci, reg, val);
> + dw_pcie_ep_writel_dbi(ep, func_no, reg, val);
>
> dw_pcie_dbi_ro_wr_dis(pci);
>
> @@ -510,38 +545,34 @@ EXPORT_SYMBOL_GPL(dw_pcie_ep_raise_legacy_irq);
> int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
> u8 interrupt_num)
> {
> - struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> + u32 msg_addr_lower, msg_addr_upper, reg;
> struct dw_pcie_ep_func *ep_func;
> struct pci_epc *epc = ep->epc;
> unsigned int aligned_offset;
> - unsigned int dbi_offset = 0;
> u16 msg_ctrl, msg_data;
> - u32 msg_addr_lower, msg_addr_upper, reg;
> - u64 msg_addr;
> bool has_upper;
> + u64 msg_addr;
> int ret;
>
> ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no);
> if (!ep_func || !ep_func->msi_cap)
> return -EINVAL;
>
> - dbi_offset = dw_pcie_ep_get_dbi_offset(ep, func_no);
> -
> /* Raise MSI per the PCI Local Bus Specification Revision 3.0, 6.8.1. */
> - reg = ep_func->msi_cap + dbi_offset + PCI_MSI_FLAGS;
> - msg_ctrl = dw_pcie_readw_dbi(pci, reg);
> + reg = ep_func->msi_cap + PCI_MSI_FLAGS;
> + msg_ctrl = dw_pcie_ep_readw_dbi(ep, func_no, reg);
> has_upper = !!(msg_ctrl & PCI_MSI_FLAGS_64BIT);
> - reg = ep_func->msi_cap + dbi_offset + PCI_MSI_ADDRESS_LO;
> - msg_addr_lower = dw_pcie_readl_dbi(pci, reg);
> + reg = ep_func->msi_cap + PCI_MSI_ADDRESS_LO;
> + msg_addr_lower = dw_pcie_ep_readl_dbi(ep, func_no, reg);
> if (has_upper) {
> - reg = ep_func->msi_cap + dbi_offset + PCI_MSI_ADDRESS_HI;
> - msg_addr_upper = dw_pcie_readl_dbi(pci, reg);
> - reg = ep_func->msi_cap + dbi_offset + PCI_MSI_DATA_64;
> - msg_data = dw_pcie_readw_dbi(pci, reg);
> + reg = ep_func->msi_cap + PCI_MSI_ADDRESS_HI;
> + msg_addr_upper = dw_pcie_ep_readl_dbi(ep, func_no, reg);
> + reg = ep_func->msi_cap + PCI_MSI_DATA_64;
> + msg_data = dw_pcie_ep_readw_dbi(ep, func_no, reg);
> } else {
> msg_addr_upper = 0;
> - reg = ep_func->msi_cap + dbi_offset + PCI_MSI_DATA_32;
> - msg_data = dw_pcie_readw_dbi(pci, reg);
> + reg = ep_func->msi_cap + PCI_MSI_DATA_32;
> + msg_data = dw_pcie_ep_readw_dbi(ep, func_no, reg);
> }
> aligned_offset = msg_addr_lower & (epc->mem->window.page_size - 1);
> msg_addr = ((u64)msg_addr_upper) << 32 |
> @@ -582,10 +613,9 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
> u16 interrupt_num)
> {
> struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> - struct dw_pcie_ep_func *ep_func;
> struct pci_epf_msix_tbl *msix_tbl;
> + struct dw_pcie_ep_func *ep_func;
> struct pci_epc *epc = ep->epc;
> - unsigned int dbi_offset = 0;
> u32 reg, msg_data, vec_ctrl;
> unsigned int aligned_offset;
> u32 tbl_offset;
> @@ -597,10 +627,8 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
> if (!ep_func || !ep_func->msix_cap)
> return -EINVAL;
>
> - dbi_offset = dw_pcie_ep_get_dbi_offset(ep, func_no);
> -
> - reg = ep_func->msix_cap + dbi_offset + PCI_MSIX_TABLE;
> - tbl_offset = dw_pcie_readl_dbi(pci, reg);
> + reg = ep_func->msix_cap + PCI_MSIX_TABLE;
> + tbl_offset = dw_pcie_ep_readl_dbi(ep, func_no, reg);
> bir = FIELD_GET(PCI_MSIX_TABLE_BIR, tbl_offset);
> tbl_offset &= PCI_MSIX_TABLE_OFFSET;
>
> --
> 2.34.1
>
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