| Message ID | 20240224-pci-dbi-rework-v8-1-64c7fd0cfe64@linaro.org (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Manivannan Sadhasivam |
| Headers | show |
| Series | PCI: dwc: ep: Fix DBI access failure for drivers requiring refclk from host | expand |
On Sat, Feb 24, 2024 at 12:24:07PM +0530, Manivannan Sadhasivam wrote: > deinit() callback was solely introduced for the pcie-rcar-gen4 driver where > it is used to do platform specific resource deallocation. And this callback > is called right at the end of the dw_pcie_ep_exit() API. So it doesn't > matter whether it is called within or outside of dw_pcie_ep_exit() API. > > So let's remove this callback and directly call rcar_gen4_pcie_ep_deinit() > in pcie-rcar-gen4 driver to do resource deallocation after the completion > of dw_pcie_ep_exit() API in rcar_gen4_remove_dw_pcie_ep(). > > This simplifies the DWC layer. > > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Reviewed-by: Frank Li <Frank.Li@nxp.com> > --- > drivers/pci/controller/dwc/pcie-designware-ep.c | 9 +-------- > drivers/pci/controller/dwc/pcie-designware.h | 1 - > drivers/pci/controller/dwc/pcie-rcar-gen4.c | 14 ++++++++------ > 3 files changed, 9 insertions(+), 15 deletions(-) > > diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c > index 5befed2dc02b..d305f9b4cdfe 100644 > --- a/drivers/pci/controller/dwc/pcie-designware-ep.c > +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c > @@ -575,9 +575,6 @@ void dw_pcie_ep_exit(struct dw_pcie_ep *ep) > epc->mem->window.page_size); > > pci_epc_mem_exit(epc); > - > - if (ep->ops->deinit) > - ep->ops->deinit(ep); > } > EXPORT_SYMBOL_GPL(dw_pcie_ep_exit); > > @@ -738,7 +735,7 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep) > ep->page_size); > if (ret < 0) { > dev_err(dev, "Failed to initialize address space\n"); > - goto err_ep_deinit; > + return ret; > } > > ep->msi_mem = pci_epc_mem_alloc_addr(epc, &ep->msi_mem_phys, > @@ -775,10 +772,6 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep) > err_exit_epc_mem: > pci_epc_mem_exit(epc); > > -err_ep_deinit: > - if (ep->ops->deinit) > - ep->ops->deinit(ep); > - > return ret; > } > EXPORT_SYMBOL_GPL(dw_pcie_ep_init); > diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h > index 26dae4837462..ab7431a37209 100644 > --- a/drivers/pci/controller/dwc/pcie-designware.h > +++ b/drivers/pci/controller/dwc/pcie-designware.h > @@ -333,7 +333,6 @@ struct dw_pcie_rp { > struct dw_pcie_ep_ops { > void (*pre_init)(struct dw_pcie_ep *ep); > void (*init)(struct dw_pcie_ep *ep); > - void (*deinit)(struct dw_pcie_ep *ep); > int (*raise_irq)(struct dw_pcie_ep *ep, u8 func_no, > unsigned int type, u16 interrupt_num); > const struct pci_epc_features* (*get_features)(struct dw_pcie_ep *ep); > diff --git a/drivers/pci/controller/dwc/pcie-rcar-gen4.c b/drivers/pci/controller/dwc/pcie-rcar-gen4.c > index e9166619b1f9..ac97d594ea47 100644 > --- a/drivers/pci/controller/dwc/pcie-rcar-gen4.c > +++ b/drivers/pci/controller/dwc/pcie-rcar-gen4.c > @@ -352,11 +352,8 @@ static void rcar_gen4_pcie_ep_init(struct dw_pcie_ep *ep) > dw_pcie_ep_reset_bar(pci, bar); > } > > -static void rcar_gen4_pcie_ep_deinit(struct dw_pcie_ep *ep) > +static void rcar_gen4_pcie_ep_deinit(struct rcar_gen4_pcie *rcar) > { > - struct dw_pcie *dw = to_dw_pcie_from_ep(ep); > - struct rcar_gen4_pcie *rcar = to_rcar_gen4_pcie(dw); > - > writel(0, rcar->base + PCIEDMAINTSTSEN); > rcar_gen4_pcie_common_deinit(rcar); > } > @@ -408,7 +405,6 @@ static unsigned int rcar_gen4_pcie_ep_get_dbi2_offset(struct dw_pcie_ep *ep, > static const struct dw_pcie_ep_ops pcie_ep_ops = { > .pre_init = rcar_gen4_pcie_ep_pre_init, > .init = rcar_gen4_pcie_ep_init, > - .deinit = rcar_gen4_pcie_ep_deinit, > .raise_irq = rcar_gen4_pcie_ep_raise_irq, > .get_features = rcar_gen4_pcie_ep_get_features, > .get_dbi_offset = rcar_gen4_pcie_ep_get_dbi_offset, > @@ -418,18 +414,24 @@ static const struct dw_pcie_ep_ops pcie_ep_ops = { > static int rcar_gen4_add_dw_pcie_ep(struct rcar_gen4_pcie *rcar) > { > struct dw_pcie_ep *ep = &rcar->dw.ep; > + int ret; > > if (!IS_ENABLED(CONFIG_PCIE_RCAR_GEN4_EP)) > return -ENODEV; > > ep->ops = &pcie_ep_ops; > > - return dw_pcie_ep_init(ep); > + ret = dw_pcie_ep_init(ep); > + if (ret) > + rcar_gen4_pcie_ep_deinit(rcar); > + > + return ret; > } > > static void rcar_gen4_remove_dw_pcie_ep(struct rcar_gen4_pcie *rcar) > { > dw_pcie_ep_exit(&rcar->dw.ep); > + rcar_gen4_pcie_ep_deinit(rcar); > } > > /* Common */ > > -- > 2.25.1 >
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index 5befed2dc02b..d305f9b4cdfe 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -575,9 +575,6 @@ void dw_pcie_ep_exit(struct dw_pcie_ep *ep) epc->mem->window.page_size); pci_epc_mem_exit(epc); - - if (ep->ops->deinit) - ep->ops->deinit(ep); } EXPORT_SYMBOL_GPL(dw_pcie_ep_exit); @@ -738,7 +735,7 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep) ep->page_size); if (ret < 0) { dev_err(dev, "Failed to initialize address space\n"); - goto err_ep_deinit; + return ret; } ep->msi_mem = pci_epc_mem_alloc_addr(epc, &ep->msi_mem_phys, @@ -775,10 +772,6 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep) err_exit_epc_mem: pci_epc_mem_exit(epc); -err_ep_deinit: - if (ep->ops->deinit) - ep->ops->deinit(ep); - return ret; } EXPORT_SYMBOL_GPL(dw_pcie_ep_init); diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 26dae4837462..ab7431a37209 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -333,7 +333,6 @@ struct dw_pcie_rp { struct dw_pcie_ep_ops { void (*pre_init)(struct dw_pcie_ep *ep); void (*init)(struct dw_pcie_ep *ep); - void (*deinit)(struct dw_pcie_ep *ep); int (*raise_irq)(struct dw_pcie_ep *ep, u8 func_no, unsigned int type, u16 interrupt_num); const struct pci_epc_features* (*get_features)(struct dw_pcie_ep *ep); diff --git a/drivers/pci/controller/dwc/pcie-rcar-gen4.c b/drivers/pci/controller/dwc/pcie-rcar-gen4.c index e9166619b1f9..ac97d594ea47 100644 --- a/drivers/pci/controller/dwc/pcie-rcar-gen4.c +++ b/drivers/pci/controller/dwc/pcie-rcar-gen4.c @@ -352,11 +352,8 @@ static void rcar_gen4_pcie_ep_init(struct dw_pcie_ep *ep) dw_pcie_ep_reset_bar(pci, bar); } -static void rcar_gen4_pcie_ep_deinit(struct dw_pcie_ep *ep) +static void rcar_gen4_pcie_ep_deinit(struct rcar_gen4_pcie *rcar) { - struct dw_pcie *dw = to_dw_pcie_from_ep(ep); - struct rcar_gen4_pcie *rcar = to_rcar_gen4_pcie(dw); - writel(0, rcar->base + PCIEDMAINTSTSEN); rcar_gen4_pcie_common_deinit(rcar); } @@ -408,7 +405,6 @@ static unsigned int rcar_gen4_pcie_ep_get_dbi2_offset(struct dw_pcie_ep *ep, static const struct dw_pcie_ep_ops pcie_ep_ops = { .pre_init = rcar_gen4_pcie_ep_pre_init, .init = rcar_gen4_pcie_ep_init, - .deinit = rcar_gen4_pcie_ep_deinit, .raise_irq = rcar_gen4_pcie_ep_raise_irq, .get_features = rcar_gen4_pcie_ep_get_features, .get_dbi_offset = rcar_gen4_pcie_ep_get_dbi_offset, @@ -418,18 +414,24 @@ static const struct dw_pcie_ep_ops pcie_ep_ops = { static int rcar_gen4_add_dw_pcie_ep(struct rcar_gen4_pcie *rcar) { struct dw_pcie_ep *ep = &rcar->dw.ep; + int ret; if (!IS_ENABLED(CONFIG_PCIE_RCAR_GEN4_EP)) return -ENODEV; ep->ops = &pcie_ep_ops; - return dw_pcie_ep_init(ep); + ret = dw_pcie_ep_init(ep); + if (ret) + rcar_gen4_pcie_ep_deinit(rcar); + + return ret; } static void rcar_gen4_remove_dw_pcie_ep(struct rcar_gen4_pcie *rcar) { dw_pcie_ep_exit(&rcar->dw.ep); + rcar_gen4_pcie_ep_deinit(rcar); } /* Common */
deinit() callback was solely introduced for the pcie-rcar-gen4 driver where it is used to do platform specific resource deallocation. And this callback is called right at the end of the dw_pcie_ep_exit() API. So it doesn't matter whether it is called within or outside of dw_pcie_ep_exit() API. So let's remove this callback and directly call rcar_gen4_pcie_ep_deinit() in pcie-rcar-gen4 driver to do resource deallocation after the completion of dw_pcie_ep_exit() API in rcar_gen4_remove_dw_pcie_ep(). This simplifies the DWC layer. Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> --- drivers/pci/controller/dwc/pcie-designware-ep.c | 9 +-------- drivers/pci/controller/dwc/pcie-designware.h | 1 - drivers/pci/controller/dwc/pcie-rcar-gen4.c | 14 ++++++++------ 3 files changed, 9 insertions(+), 15 deletions(-)