| Message ID | 20240606-pci-deinit-v1-2-4395534520dc@linaro.org (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | PCI: endpoint: Add EPC 'deinit' event and dw_pcie_ep_linkdown() API | expand |
On Thu, Jun 06, 2024 at 12:56:35PM +0530, Manivannan Sadhasivam wrote: > As like the 'epc_init' event, that is used to signal the EPF drivers about > the EPC initialization, let's introduce 'epc_deinit' event that is used to > signal EPC deinitialization. > > The EPC deinitialization applies only when any sort of fundamental reset > is supported by the endpoint controller as per the PCIe spec. > > Reference: PCIe Base spec v5.0, sections 4.2.4.9.1 and 6.6.1. > > Currently, some EPC drivers like pcie-qcom-ep and pcie-tegra194 support > PERST# as the fundamental reset. So the 'deinit' event will be notified to > the EPF drivers when PERST# assert happens in the above mentioned EPC > drivers. > > The EPF drivers, on receiving the event through the epc_deinit() callback > should reset the EPF state machine and also cleanup any configuration that > got affected by the fundamental reset like BAR, DMA etc... > > This change also warrants skipping the cleanups in unbind() if already done > in epc_deinit(). > > Reviewed-by: Niklas Cassel <cassel@kernel.org> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Reviewed-by: Siddharth Vadapalli <s-vadapalli@ti.com> [...] Regards, Siddharth.
On Thu, Jun 06, 2024 at 12:56:35PM +0530, Manivannan Sadhasivam wrote: > As like the 'epc_init' event, that is used to signal the EPF drivers about > the EPC initialization, let's introduce 'epc_deinit' event that is used to > signal EPC deinitialization. > > The EPC deinitialization applies only when any sort of fundamental reset > is supported by the endpoint controller as per the PCIe spec. > > Reference: PCIe Base spec v5.0, sections 4.2.4.9.1 and 6.6.1. > > Currently, some EPC drivers like pcie-qcom-ep and pcie-tegra194 support > PERST# as the fundamental reset. So the 'deinit' event will be notified to > the EPF drivers when PERST# assert happens in the above mentioned EPC > drivers. > > The EPF drivers, on receiving the event through the epc_deinit() callback > should reset the EPF state machine and also cleanup any configuration that > got affected by the fundamental reset like BAR, DMA etc... > > This change also warrants skipping the cleanups in unbind() if already done > in epc_deinit(). > > Reviewed-by: Niklas Cassel <cassel@kernel.org> > 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 | 1 - > drivers/pci/controller/dwc/pcie-qcom-ep.c | 1 + > drivers/pci/controller/dwc/pcie-tegra194.c | 1 + > drivers/pci/endpoint/functions/pci-epf-mhi.c | 19 +++++++++++++++++++ > drivers/pci/endpoint/functions/pci-epf-test.c | 17 +++++++++++++++-- > drivers/pci/endpoint/pci-epc-core.c | 25 +++++++++++++++++++++++++ > include/linux/pci-epc.h | 13 +++++++++++++ > include/linux/pci-epf.h | 2 ++ > 8 files changed, 76 insertions(+), 3 deletions(-) > > diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c > index 2e69f81baf99..78d5fc72c9cb 100644 > --- a/drivers/pci/controller/dwc/pcie-designware-ep.c > +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c > @@ -620,7 +620,6 @@ void dw_pcie_ep_cleanup(struct dw_pcie_ep *ep) > struct dw_pcie *pci = to_dw_pcie_from_ep(ep); > > dw_pcie_edma_remove(pci); > - ep->epc->init_complete = false; > } > EXPORT_SYMBOL_GPL(dw_pcie_ep_cleanup); > > diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c > index 4d2d7457dcb3..2324e56c9bfc 100644 > --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c > +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c > @@ -507,6 +507,7 @@ static void qcom_pcie_perst_assert(struct dw_pcie *pci) > return; > } > > + pci_epc_deinit_notify(pci->ep.epc); > dw_pcie_ep_cleanup(&pci->ep); > qcom_pcie_disable_resources(pcie_ep); > pcie_ep->link_status = QCOM_PCIE_EP_LINK_DISABLED; > diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c > index 432ed9d9a463..4ca7404246a3 100644 > --- a/drivers/pci/controller/dwc/pcie-tegra194.c > +++ b/drivers/pci/controller/dwc/pcie-tegra194.c > @@ -1715,6 +1715,7 @@ static void pex_ep_event_pex_rst_assert(struct tegra_pcie_dw *pcie) > if (ret) > dev_err(pcie->dev, "Failed to go Detect state: %d\n", ret); > > + pci_epc_deinit_notify(pcie->pci.ep.epc); > dw_pcie_ep_cleanup(&pcie->pci.ep); > > reset_control_assert(pcie->core_rst); > diff --git a/drivers/pci/endpoint/functions/pci-epf-mhi.c b/drivers/pci/endpoint/functions/pci-epf-mhi.c > index 205c02953f25..5832989e55e8 100644 > --- a/drivers/pci/endpoint/functions/pci-epf-mhi.c > +++ b/drivers/pci/endpoint/functions/pci-epf-mhi.c > @@ -764,6 +764,24 @@ static int pci_epf_mhi_epc_init(struct pci_epf *epf) > return 0; > } > > +static void pci_epf_mhi_epc_deinit(struct pci_epf *epf) > +{ > + struct pci_epf_mhi *epf_mhi = epf_get_drvdata(epf); > + const struct pci_epf_mhi_ep_info *info = epf_mhi->info; > + struct pci_epf_bar *epf_bar = &epf->bar[info->bar_num]; > + struct mhi_ep_cntrl *mhi_cntrl = &epf_mhi->mhi_cntrl; > + struct pci_epc *epc = epf->epc; > + > + if (mhi_cntrl->mhi_dev) { > + mhi_ep_power_down(mhi_cntrl); > + if (info->flags & MHI_EPF_USE_DMA) > + pci_epf_mhi_dma_deinit(epf_mhi); > + mhi_ep_unregister_controller(mhi_cntrl); > + } > + > + pci_epc_clear_bar(epc, epf->func_no, epf->vfunc_no, epf_bar); > +} > + > static int pci_epf_mhi_link_up(struct pci_epf *epf) > { > struct pci_epf_mhi *epf_mhi = epf_get_drvdata(epf); > @@ -898,6 +916,7 @@ static void pci_epf_mhi_unbind(struct pci_epf *epf) > > static const struct pci_epc_event_ops pci_epf_mhi_event_ops = { > .epc_init = pci_epf_mhi_epc_init, > + .epc_deinit = pci_epf_mhi_epc_deinit, > .link_up = pci_epf_mhi_link_up, > .link_down = pci_epf_mhi_link_down, > .bus_master_enable = pci_epf_mhi_bus_master_enable, > diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c > index e771be7512a1..7c2ed6eae53a 100644 > --- a/drivers/pci/endpoint/functions/pci-epf-test.c > +++ b/drivers/pci/endpoint/functions/pci-epf-test.c > @@ -782,6 +782,15 @@ static int pci_epf_test_epc_init(struct pci_epf *epf) > return 0; > } > > +static void pci_epf_test_epc_deinit(struct pci_epf *epf) > +{ > + struct pci_epf_test *epf_test = epf_get_drvdata(epf); > + > + cancel_delayed_work(&epf_test->cmd_handler); > + pci_epf_test_clean_dma_chan(epf_test); > + pci_epf_test_clear_bar(epf); > +} > + > static int pci_epf_test_link_up(struct pci_epf *epf) > { > struct pci_epf_test *epf_test = epf_get_drvdata(epf); > @@ -803,6 +812,7 @@ static int pci_epf_test_link_down(struct pci_epf *epf) > > static const struct pci_epc_event_ops pci_epf_test_event_ops = { > .epc_init = pci_epf_test_epc_init, > + .epc_deinit = pci_epf_test_epc_deinit, > .link_up = pci_epf_test_link_up, > .link_down = pci_epf_test_link_down, > }; > @@ -905,10 +915,13 @@ static int pci_epf_test_bind(struct pci_epf *epf) > static void pci_epf_test_unbind(struct pci_epf *epf) > { > struct pci_epf_test *epf_test = epf_get_drvdata(epf); > + struct pci_epc *epc = epf->epc; > > cancel_delayed_work(&epf_test->cmd_handler); > - pci_epf_test_clean_dma_chan(epf_test); > - pci_epf_test_clear_bar(epf); > + if (epc->init_complete) { > + pci_epf_test_clean_dma_chan(epf_test); > + pci_epf_test_clear_bar(epf); > + } > pci_epf_test_free_space(epf); > } > > diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c > index 56b60330355d..47a91dcb07d7 100644 > --- a/drivers/pci/endpoint/pci-epc-core.c > +++ b/drivers/pci/endpoint/pci-epc-core.c > @@ -774,6 +774,31 @@ void pci_epc_notify_pending_init(struct pci_epc *epc, struct pci_epf *epf) > } > EXPORT_SYMBOL_GPL(pci_epc_notify_pending_init); > > +/** > + * pci_epc_deinit_notify() - Notify the EPF device about EPC deinitialization > + * @epc: the EPC device whose deinitialization is completed > + * > + * Invoke to notify the EPF device that the EPC deinitialization is completed. > + */ > +void pci_epc_deinit_notify(struct pci_epc *epc) > +{ > + struct pci_epf *epf; > + > + if (IS_ERR_OR_NULL(epc)) > + return; > + > + mutex_lock(&epc->list_lock); > + list_for_each_entry(epf, &epc->pci_epf, list) { > + mutex_lock(&epf->lock); > + if (epf->event_ops && epf->event_ops->epc_deinit) > + epf->event_ops->epc_deinit(epf); > + mutex_unlock(&epf->lock); > + } > + epc->init_complete = false; > + mutex_unlock(&epc->list_lock); > +} > +EXPORT_SYMBOL_GPL(pci_epc_deinit_notify); > + > /** > * pci_epc_bus_master_enable_notify() - Notify the EPF device that the EPC > * device has received the Bus Master > diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h > index 11115cd0fe5b..85bdf2adb760 100644 > --- a/include/linux/pci-epc.h > +++ b/include/linux/pci-epc.h > @@ -197,6 +197,8 @@ struct pci_epc_features { > > #define to_pci_epc(device) container_of((device), struct pci_epc, dev) > > +#ifdef CONFIG_PCI_ENDPOINT > + > #define pci_epc_create(dev, ops) \ > __pci_epc_create((dev), (ops), THIS_MODULE) > #define devm_pci_epc_create(dev, ops) \ > @@ -226,6 +228,7 @@ void pci_epc_linkup(struct pci_epc *epc); > void pci_epc_linkdown(struct pci_epc *epc); > void pci_epc_init_notify(struct pci_epc *epc); > void pci_epc_notify_pending_init(struct pci_epc *epc, struct pci_epf *epf); > +void pci_epc_deinit_notify(struct pci_epc *epc); > void pci_epc_bus_master_enable_notify(struct pci_epc *epc); > void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf, > enum pci_epc_interface_type type); > @@ -272,4 +275,14 @@ void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc, > phys_addr_t *phys_addr, size_t size); > void pci_epc_mem_free_addr(struct pci_epc *epc, phys_addr_t phys_addr, > void __iomem *virt_addr, size_t size); > + > +#else > +static inline void pci_epc_init_notify(struct pci_epc *epc) > +{ > +} > + > +static inline void pci_epc_deinit_notify(struct pci_epc *epc) > +{ > +} > +#endif /* CONFIG_PCI_ENDPOINT */ > #endif /* __LINUX_PCI_EPC_H */ > diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h > index dc759eb7157c..0639d4dc8986 100644 > --- a/include/linux/pci-epf.h > +++ b/include/linux/pci-epf.h > @@ -71,12 +71,14 @@ struct pci_epf_ops { > /** > * struct pci_epc_event_ops - Callbacks for capturing the EPC events > * @epc_init: Callback for the EPC initialization complete event > + * @epc_deinit: Callback for the EPC deinitialization event > * @link_up: Callback for the EPC link up event > * @link_down: Callback for the EPC link down event > * @bus_master_enable: Callback for the EPC Bus Master Enable event > */ > struct pci_epc_event_ops { > int (*epc_init)(struct pci_epf *epf); > + void (*epc_deinit)(struct pci_epf *epf); > int (*link_up)(struct pci_epf *epf); > int (*link_down)(struct pci_epf *epf); > int (*bus_master_enable)(struct pci_epf *epf); > > -- > 2.25.1 >
On Thu, Jun 06, 2024 at 12:56:35PM +0530, Manivannan Sadhasivam wrote: > As like the 'epc_init' event, that is used to signal the EPF drivers about > the EPC initialization, let's introduce 'epc_deinit' event that is used to > signal EPC deinitialization. > > The EPC deinitialization applies only when any sort of fundamental reset > is supported by the endpoint controller as per the PCIe spec. > > Reference: PCIe Base spec v5.0, sections 4.2.4.9.1 and 6.6.1. PCIe r6.0, sec 4.2.5.9.1 and 6.6.1. (Not 4.2.4.9.1, which no longer exists in r6.x) > Currently, some EPC drivers like pcie-qcom-ep and pcie-tegra194 support > PERST# as the fundamental reset. So the 'deinit' event will be notified to > the EPF drivers when PERST# assert happens in the above mentioned EPC > drivers. > > The EPF drivers, on receiving the event through the epc_deinit() callback > should reset the EPF state machine and also cleanup any configuration that > got affected by the fundamental reset like BAR, DMA etc... > > This change also warrants skipping the cleanups in unbind() if already done > in epc_deinit(). > > Reviewed-by: Niklas Cassel <cassel@kernel.org> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
On Tue, Jun 11, 2024 at 05:06:40PM -0500, Bjorn Helgaas wrote: > On Thu, Jun 06, 2024 at 12:56:35PM +0530, Manivannan Sadhasivam wrote: > > As like the 'epc_init' event, that is used to signal the EPF drivers about > > the EPC initialization, let's introduce 'epc_deinit' event that is used to > > signal EPC deinitialization. > > > > The EPC deinitialization applies only when any sort of fundamental reset > > is supported by the endpoint controller as per the PCIe spec. > > > > Reference: PCIe Base spec v5.0, sections 4.2.4.9.1 and 6.6.1. > > PCIe r6.0, sec 4.2.5.9.1 and 6.6.1. > > (Not 4.2.4.9.1, which no longer exists in r6.x) > Ammended the commit in pci/endpoint, thanks! - Mani > > Currently, some EPC drivers like pcie-qcom-ep and pcie-tegra194 support > > PERST# as the fundamental reset. So the 'deinit' event will be notified to > > the EPF drivers when PERST# assert happens in the above mentioned EPC > > drivers. > > > > The EPF drivers, on receiving the event through the epc_deinit() callback > > should reset the EPF state machine and also cleanup any configuration that > > got affected by the fundamental reset like BAR, DMA etc... > > > > This change also warrants skipping the cleanups in unbind() if already done > > in epc_deinit(). > > > > Reviewed-by: Niklas Cassel <cassel@kernel.org> > > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
… > +++ b/drivers/pci/endpoint/pci-epc-core.c … > +void pci_epc_deinit_notify(struct pci_epc *epc) > +{ … > + mutex_lock(&epc->list_lock); > + list_for_each_entry(epf, &epc->pci_epf, list) { > + mutex_lock(&epf->lock); > + if (epf->event_ops && epf->event_ops->epc_deinit) > + epf->event_ops->epc_deinit(epf); > + mutex_unlock(&epf->lock); > + } > + epc->init_complete = false; > + mutex_unlock(&epc->list_lock); > +} … Would you become interested to apply lock guards? https://elixir.bootlin.com/linux/v6.10-rc3/source/include/linux/mutex.h#L196 Regards, Markus
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index 2e69f81baf99..78d5fc72c9cb 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -620,7 +620,6 @@ void dw_pcie_ep_cleanup(struct dw_pcie_ep *ep) struct dw_pcie *pci = to_dw_pcie_from_ep(ep); dw_pcie_edma_remove(pci); - ep->epc->init_complete = false; } EXPORT_SYMBOL_GPL(dw_pcie_ep_cleanup); diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c index 4d2d7457dcb3..2324e56c9bfc 100644 --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c @@ -507,6 +507,7 @@ static void qcom_pcie_perst_assert(struct dw_pcie *pci) return; } + pci_epc_deinit_notify(pci->ep.epc); dw_pcie_ep_cleanup(&pci->ep); qcom_pcie_disable_resources(pcie_ep); pcie_ep->link_status = QCOM_PCIE_EP_LINK_DISABLED; diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c index 432ed9d9a463..4ca7404246a3 100644 --- a/drivers/pci/controller/dwc/pcie-tegra194.c +++ b/drivers/pci/controller/dwc/pcie-tegra194.c @@ -1715,6 +1715,7 @@ static void pex_ep_event_pex_rst_assert(struct tegra_pcie_dw *pcie) if (ret) dev_err(pcie->dev, "Failed to go Detect state: %d\n", ret); + pci_epc_deinit_notify(pcie->pci.ep.epc); dw_pcie_ep_cleanup(&pcie->pci.ep); reset_control_assert(pcie->core_rst); diff --git a/drivers/pci/endpoint/functions/pci-epf-mhi.c b/drivers/pci/endpoint/functions/pci-epf-mhi.c index 205c02953f25..5832989e55e8 100644 --- a/drivers/pci/endpoint/functions/pci-epf-mhi.c +++ b/drivers/pci/endpoint/functions/pci-epf-mhi.c @@ -764,6 +764,24 @@ static int pci_epf_mhi_epc_init(struct pci_epf *epf) return 0; } +static void pci_epf_mhi_epc_deinit(struct pci_epf *epf) +{ + struct pci_epf_mhi *epf_mhi = epf_get_drvdata(epf); + const struct pci_epf_mhi_ep_info *info = epf_mhi->info; + struct pci_epf_bar *epf_bar = &epf->bar[info->bar_num]; + struct mhi_ep_cntrl *mhi_cntrl = &epf_mhi->mhi_cntrl; + struct pci_epc *epc = epf->epc; + + if (mhi_cntrl->mhi_dev) { + mhi_ep_power_down(mhi_cntrl); + if (info->flags & MHI_EPF_USE_DMA) + pci_epf_mhi_dma_deinit(epf_mhi); + mhi_ep_unregister_controller(mhi_cntrl); + } + + pci_epc_clear_bar(epc, epf->func_no, epf->vfunc_no, epf_bar); +} + static int pci_epf_mhi_link_up(struct pci_epf *epf) { struct pci_epf_mhi *epf_mhi = epf_get_drvdata(epf); @@ -898,6 +916,7 @@ static void pci_epf_mhi_unbind(struct pci_epf *epf) static const struct pci_epc_event_ops pci_epf_mhi_event_ops = { .epc_init = pci_epf_mhi_epc_init, + .epc_deinit = pci_epf_mhi_epc_deinit, .link_up = pci_epf_mhi_link_up, .link_down = pci_epf_mhi_link_down, .bus_master_enable = pci_epf_mhi_bus_master_enable, diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c index e771be7512a1..7c2ed6eae53a 100644 --- a/drivers/pci/endpoint/functions/pci-epf-test.c +++ b/drivers/pci/endpoint/functions/pci-epf-test.c @@ -782,6 +782,15 @@ static int pci_epf_test_epc_init(struct pci_epf *epf) return 0; } +static void pci_epf_test_epc_deinit(struct pci_epf *epf) +{ + struct pci_epf_test *epf_test = epf_get_drvdata(epf); + + cancel_delayed_work(&epf_test->cmd_handler); + pci_epf_test_clean_dma_chan(epf_test); + pci_epf_test_clear_bar(epf); +} + static int pci_epf_test_link_up(struct pci_epf *epf) { struct pci_epf_test *epf_test = epf_get_drvdata(epf); @@ -803,6 +812,7 @@ static int pci_epf_test_link_down(struct pci_epf *epf) static const struct pci_epc_event_ops pci_epf_test_event_ops = { .epc_init = pci_epf_test_epc_init, + .epc_deinit = pci_epf_test_epc_deinit, .link_up = pci_epf_test_link_up, .link_down = pci_epf_test_link_down, }; @@ -905,10 +915,13 @@ static int pci_epf_test_bind(struct pci_epf *epf) static void pci_epf_test_unbind(struct pci_epf *epf) { struct pci_epf_test *epf_test = epf_get_drvdata(epf); + struct pci_epc *epc = epf->epc; cancel_delayed_work(&epf_test->cmd_handler); - pci_epf_test_clean_dma_chan(epf_test); - pci_epf_test_clear_bar(epf); + if (epc->init_complete) { + pci_epf_test_clean_dma_chan(epf_test); + pci_epf_test_clear_bar(epf); + } pci_epf_test_free_space(epf); } diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c index 56b60330355d..47a91dcb07d7 100644 --- a/drivers/pci/endpoint/pci-epc-core.c +++ b/drivers/pci/endpoint/pci-epc-core.c @@ -774,6 +774,31 @@ void pci_epc_notify_pending_init(struct pci_epc *epc, struct pci_epf *epf) } EXPORT_SYMBOL_GPL(pci_epc_notify_pending_init); +/** + * pci_epc_deinit_notify() - Notify the EPF device about EPC deinitialization + * @epc: the EPC device whose deinitialization is completed + * + * Invoke to notify the EPF device that the EPC deinitialization is completed. + */ +void pci_epc_deinit_notify(struct pci_epc *epc) +{ + struct pci_epf *epf; + + if (IS_ERR_OR_NULL(epc)) + return; + + mutex_lock(&epc->list_lock); + list_for_each_entry(epf, &epc->pci_epf, list) { + mutex_lock(&epf->lock); + if (epf->event_ops && epf->event_ops->epc_deinit) + epf->event_ops->epc_deinit(epf); + mutex_unlock(&epf->lock); + } + epc->init_complete = false; + mutex_unlock(&epc->list_lock); +} +EXPORT_SYMBOL_GPL(pci_epc_deinit_notify); + /** * pci_epc_bus_master_enable_notify() - Notify the EPF device that the EPC * device has received the Bus Master diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h index 11115cd0fe5b..85bdf2adb760 100644 --- a/include/linux/pci-epc.h +++ b/include/linux/pci-epc.h @@ -197,6 +197,8 @@ struct pci_epc_features { #define to_pci_epc(device) container_of((device), struct pci_epc, dev) +#ifdef CONFIG_PCI_ENDPOINT + #define pci_epc_create(dev, ops) \ __pci_epc_create((dev), (ops), THIS_MODULE) #define devm_pci_epc_create(dev, ops) \ @@ -226,6 +228,7 @@ void pci_epc_linkup(struct pci_epc *epc); void pci_epc_linkdown(struct pci_epc *epc); void pci_epc_init_notify(struct pci_epc *epc); void pci_epc_notify_pending_init(struct pci_epc *epc, struct pci_epf *epf); +void pci_epc_deinit_notify(struct pci_epc *epc); void pci_epc_bus_master_enable_notify(struct pci_epc *epc); void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf, enum pci_epc_interface_type type); @@ -272,4 +275,14 @@ void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc, phys_addr_t *phys_addr, size_t size); void pci_epc_mem_free_addr(struct pci_epc *epc, phys_addr_t phys_addr, void __iomem *virt_addr, size_t size); + +#else +static inline void pci_epc_init_notify(struct pci_epc *epc) +{ +} + +static inline void pci_epc_deinit_notify(struct pci_epc *epc) +{ +} +#endif /* CONFIG_PCI_ENDPOINT */ #endif /* __LINUX_PCI_EPC_H */ diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h index dc759eb7157c..0639d4dc8986 100644 --- a/include/linux/pci-epf.h +++ b/include/linux/pci-epf.h @@ -71,12 +71,14 @@ struct pci_epf_ops { /** * struct pci_epc_event_ops - Callbacks for capturing the EPC events * @epc_init: Callback for the EPC initialization complete event + * @epc_deinit: Callback for the EPC deinitialization event * @link_up: Callback for the EPC link up event * @link_down: Callback for the EPC link down event * @bus_master_enable: Callback for the EPC Bus Master Enable event */ struct pci_epc_event_ops { int (*epc_init)(struct pci_epf *epf); + void (*epc_deinit)(struct pci_epf *epf); int (*link_up)(struct pci_epf *epf); int (*link_down)(struct pci_epf *epf); int (*bus_master_enable)(struct pci_epf *epf);