| Message ID | 20230922065331.3806925-2-yoshihiro.shimoda.uh@renesas.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v21,01/16] PCI: dwc: endpoint: Add multiple PFs support for dbi2 | expand |
On Fri, Sep 22, 2023 at 03:53:16PM +0900, Yoshihiro Shimoda wrote: > The commit 24ede430fa49 ("PCI: designware-ep: Add multiple PFs support > for DWC") added .func_conf_select() to get the configuration space of > different PFs and assumed that the offsets between dbi and dbi2 would > be the same. > > However, Renesas R-Car Gen4 PCIe controllers have different offsets of > function 1: dbi (+0x1000) and dbi2 (+0x800). To get the offset for dbi2, > add .get_dbi2_offset() and dw_pcie_ep_get_dbi2_offset(). > > Note: > - .func_conf_select() should be renamed later. > - dw_pcie_ep_get_dbi2_offset() will call .func_conf_select() > if .get_dbi2_offset() doesn't exist for backward compatibility. > - dw_pcie_writeX_{dbi/dbi2} APIs accepted the func_no argument, > so that these offset calculations are contained in the API > definitions itself as it should. > > [kwilczynski: commit log] > Link: https://lore.kernel.org/linux-pci/20230825093219.2685912-6-yoshihiro.shimoda.uh@renesas.com No need of the "Link". It will be added by the maintainer while applying this patch. > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Your s-o-b tag should come last indicating that you are sending the patch. - Mani > Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org> > --- > .../pci/controller/dwc/pcie-designware-ep.c | 32 ++++++++++++++----- > drivers/pci/controller/dwc/pcie-designware.h | 1 + > 2 files changed, 25 insertions(+), 8 deletions(-) > > diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c > index f9182f8d552f..851538ddec0a 100644 > --- a/drivers/pci/controller/dwc/pcie-designware-ep.c > +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c > @@ -52,21 +52,35 @@ static unsigned int dw_pcie_ep_func_select(struct dw_pcie_ep *ep, u8 func_no) > return func_offset; > } > > +static unsigned int dw_pcie_ep_get_dbi2_offset(struct dw_pcie_ep *ep, u8 func_no) > +{ > + unsigned int dbi2_offset = 0; > + > + if (ep->ops->get_dbi2_offset) > + dbi2_offset = ep->ops->get_dbi2_offset(ep, func_no); > + else if (ep->ops->func_conf_select) /* for backward compatibility */ > + dbi2_offset = ep->ops->func_conf_select(ep, func_no); > + > + return dbi2_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; > + unsigned int func_offset, dbi2_offset; > struct dw_pcie_ep *ep = &pci->ep; > + u32 reg, reg_dbi2; > > func_offset = dw_pcie_ep_func_select(ep, func_no); > + dbi2_offset = dw_pcie_ep_get_dbi2_offset(ep, func_no); > > reg = func_offset + PCI_BASE_ADDRESS_0 + (4 * bar); > + reg_dbi2 = dbi2_offset + PCI_BASE_ADDRESS_0 + (4 * bar); > dw_pcie_dbi_ro_wr_en(pci); > - dw_pcie_writel_dbi2(pci, reg, 0x0); > + dw_pcie_writel_dbi2(pci, reg_dbi2, 0x0); > dw_pcie_writel_dbi(pci, reg, 0x0); > if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) { > - dw_pcie_writel_dbi2(pci, reg + 4, 0x0); > + dw_pcie_writel_dbi2(pci, reg_dbi2 + 4, 0x0); > dw_pcie_writel_dbi(pci, reg + 4, 0x0); > } > dw_pcie_dbi_ro_wr_dis(pci); > @@ -228,16 +242,18 @@ 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 func_offset, dbi2_offset; > enum pci_barno bar = epf_bar->barno; > size_t size = epf_bar->size; > int flags = epf_bar->flags; > - unsigned int func_offset = 0; > + u32 reg, reg_dbi2; > int ret, type; > - u32 reg; > > func_offset = dw_pcie_ep_func_select(ep, func_no); > + dbi2_offset = dw_pcie_ep_get_dbi2_offset(ep, func_no); > > reg = PCI_BASE_ADDRESS_0 + (4 * bar) + func_offset; > + reg_dbi2 = PCI_BASE_ADDRESS_0 + (4 * bar) + dbi2_offset; > > if (!(flags & PCI_BASE_ADDRESS_SPACE)) > type = PCIE_ATU_TYPE_MEM; > @@ -253,11 +269,11 @@ 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, lower_32_bits(size - 1)); > + dw_pcie_writel_dbi2(pci, reg_dbi2, lower_32_bits(size - 1)); > dw_pcie_writel_dbi(pci, reg, flags); > > if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) { > - dw_pcie_writel_dbi2(pci, reg + 4, upper_32_bits(size - 1)); > + dw_pcie_writel_dbi2(pci, reg_dbi2 + 4, upper_32_bits(size - 1)); > dw_pcie_writel_dbi(pci, reg + 4, 0); > } > > diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h > index ef0b2efa9f93..6189884b4efa 100644 > --- a/drivers/pci/controller/dwc/pcie-designware.h > +++ b/drivers/pci/controller/dwc/pcie-designware.h > @@ -341,6 +341,7 @@ struct dw_pcie_ep_ops { > * driver. > */ > unsigned int (*func_conf_select)(struct dw_pcie_ep *ep, u8 func_no); > + unsigned int (*get_dbi2_offset)(struct dw_pcie_ep *ep, u8 func_no); > }; > > struct dw_pcie_ep_func { > -- > 2.25.1 >
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index f9182f8d552f..851538ddec0a 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -52,21 +52,35 @@ static unsigned int dw_pcie_ep_func_select(struct dw_pcie_ep *ep, u8 func_no) return func_offset; } +static unsigned int dw_pcie_ep_get_dbi2_offset(struct dw_pcie_ep *ep, u8 func_no) +{ + unsigned int dbi2_offset = 0; + + if (ep->ops->get_dbi2_offset) + dbi2_offset = ep->ops->get_dbi2_offset(ep, func_no); + else if (ep->ops->func_conf_select) /* for backward compatibility */ + dbi2_offset = ep->ops->func_conf_select(ep, func_no); + + return dbi2_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; + unsigned int func_offset, dbi2_offset; struct dw_pcie_ep *ep = &pci->ep; + u32 reg, reg_dbi2; func_offset = dw_pcie_ep_func_select(ep, func_no); + dbi2_offset = dw_pcie_ep_get_dbi2_offset(ep, func_no); reg = func_offset + PCI_BASE_ADDRESS_0 + (4 * bar); + reg_dbi2 = dbi2_offset + PCI_BASE_ADDRESS_0 + (4 * bar); dw_pcie_dbi_ro_wr_en(pci); - dw_pcie_writel_dbi2(pci, reg, 0x0); + dw_pcie_writel_dbi2(pci, reg_dbi2, 0x0); dw_pcie_writel_dbi(pci, reg, 0x0); if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) { - dw_pcie_writel_dbi2(pci, reg + 4, 0x0); + dw_pcie_writel_dbi2(pci, reg_dbi2 + 4, 0x0); dw_pcie_writel_dbi(pci, reg + 4, 0x0); } dw_pcie_dbi_ro_wr_dis(pci); @@ -228,16 +242,18 @@ 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 func_offset, dbi2_offset; enum pci_barno bar = epf_bar->barno; size_t size = epf_bar->size; int flags = epf_bar->flags; - unsigned int func_offset = 0; + u32 reg, reg_dbi2; int ret, type; - u32 reg; func_offset = dw_pcie_ep_func_select(ep, func_no); + dbi2_offset = dw_pcie_ep_get_dbi2_offset(ep, func_no); reg = PCI_BASE_ADDRESS_0 + (4 * bar) + func_offset; + reg_dbi2 = PCI_BASE_ADDRESS_0 + (4 * bar) + dbi2_offset; if (!(flags & PCI_BASE_ADDRESS_SPACE)) type = PCIE_ATU_TYPE_MEM; @@ -253,11 +269,11 @@ 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, lower_32_bits(size - 1)); + dw_pcie_writel_dbi2(pci, reg_dbi2, lower_32_bits(size - 1)); dw_pcie_writel_dbi(pci, reg, flags); if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) { - dw_pcie_writel_dbi2(pci, reg + 4, upper_32_bits(size - 1)); + dw_pcie_writel_dbi2(pci, reg_dbi2 + 4, upper_32_bits(size - 1)); dw_pcie_writel_dbi(pci, reg + 4, 0); } diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index ef0b2efa9f93..6189884b4efa 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -341,6 +341,7 @@ struct dw_pcie_ep_ops { * driver. */ unsigned int (*func_conf_select)(struct dw_pcie_ep *ep, u8 func_no); + unsigned int (*get_dbi2_offset)(struct dw_pcie_ep *ep, u8 func_no); }; struct dw_pcie_ep_func {
The commit 24ede430fa49 ("PCI: designware-ep: Add multiple PFs support for DWC") added .func_conf_select() to get the configuration space of different PFs and assumed that the offsets between dbi and dbi2 would be the same. However, Renesas R-Car Gen4 PCIe controllers have different offsets of function 1: dbi (+0x1000) and dbi2 (+0x800). To get the offset for dbi2, add .get_dbi2_offset() and dw_pcie_ep_get_dbi2_offset(). Note: - .func_conf_select() should be renamed later. - dw_pcie_ep_get_dbi2_offset() will call .func_conf_select() if .get_dbi2_offset() doesn't exist for backward compatibility. - dw_pcie_writeX_{dbi/dbi2} APIs accepted the func_no argument, so that these offset calculations are contained in the API definitions itself as it should. [kwilczynski: commit log] Link: https://lore.kernel.org/linux-pci/20230825093219.2685912-6-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org> --- .../pci/controller/dwc/pcie-designware-ep.c | 32 ++++++++++++++----- drivers/pci/controller/dwc/pcie-designware.h | 1 + 2 files changed, 25 insertions(+), 8 deletions(-)