| Message ID | 20230825090129.65721-8-minda.chen@starfivetech.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Krzysztof Wilczyński |
| Headers | show |
| Series | Refactoring Microchip PCIe driver and add StarFive PCIe | expand |
Hey Minda, I would like Daire to take a look at this, but I have a few more smaller comments on this. On Fri, Aug 25, 2023 at 05:01:25PM +0800, Minda Chen wrote: > Rename IRQ init function and prepare for re-use > IRQ init function. > Add plda_pcie_ops function pointer data structure, > PolarFire PCIe uses function pointer to get > their events num. > > rename list: > mc_init_interrupts() -> plda_init_interrupts() > mc_pcie_init_irq_domain()-> plda_pcie_init_irq_domains() > > Signed-off-by: Minda Chen <minda.chen@starfivetech.com> > --- > .../pci/controller/plda/pcie-microchip-host.c | 49 ++++++++++++++----- > drivers/pci/controller/plda/pcie-plda.h | 14 ++++++ > 2 files changed, 51 insertions(+), 12 deletions(-) > > diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c > index b1d5b5b3cee5..03e8e93ea7e4 100644 > --- a/drivers/pci/controller/plda/pcie-microchip-host.c > +++ b/drivers/pci/controller/plda/pcie-microchip-host.c > @@ -416,7 +416,10 @@ static void mc_handle_event(struct irq_desc *desc) > > chained_irq_enter(chip, desc); > > - events = get_events(port); > + if (port->ops && port->ops->get_events) > + events = port->ops->get_events(port); > + else > + events = get_events(port); I don't really understand why we are going to having two different sorts of event acquirers here. Is there a reason to not "just" register get_events() as the default callback & remove the special casing? > > for_each_set_bit(bit, &events, NUM_EVENTS) > generic_handle_domain_irq(port->event_domain, bit); > @@ -562,11 +565,12 @@ static int mc_pcie_init_clks(struct device *dev) > return 0; > } > > -static int mc_pcie_init_irq_domains(struct plda_pcie_rp *port) > +static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port, struct plda_evt *evt) Could you just spell out the word "event" in all of these data structures and variables? The existing code seems to always spell it out, so its a boon for consistency too. > { > struct device *dev = port->dev; > struct device_node *node = dev->of_node; > struct device_node *pcie_intc_node; > + const struct irq_domain_ops *ops; > > /* Setup INTx */ > pcie_intc_node = of_get_next_child(node, NULL); > @@ -575,8 +579,9 @@ static int mc_pcie_init_irq_domains(struct plda_pcie_rp *port) > return -EINVAL; > } > > - port->event_domain = irq_domain_add_linear(pcie_intc_node, NUM_EVENTS, > - &event_domain_ops, port); > + ops = evt->domain_ops ? evt->domain_ops : &event_domain_ops; > + port->event_domain = irq_domain_add_linear(pcie_intc_node, port->num_events, > + ops, port); > if (!port->event_domain) { > dev_err(dev, "failed to get event domain\n"); > of_node_put(pcie_intc_node); > @@ -661,14 +666,15 @@ static void mc_disable_interrupts(struct mc_pcie *port) > writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_HOST); > } > > -static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp *port) > +static int plda_init_interrupts(struct platform_device *pdev, > + struct plda_pcie_rp *port, struct plda_evt *evt) > { > struct device *dev = &pdev->dev; > int irq; > int i, intx_irq, msi_irq, event_irq; > int ret; > > - ret = mc_pcie_init_irq_domains(port); > + ret = plda_pcie_init_irq_domains(port, evt); > if (ret) { > dev_err(dev, "failed creating IRQ domains\n"); > return ret; > @@ -678,15 +684,18 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp > if (irq < 0) > return -ENODEV; > > - for (i = 0; i < NUM_EVENTS; i++) { > + for (i = 0; i < port->num_events; i++) { > event_irq = irq_create_mapping(port->event_domain, i); > if (!event_irq) { > dev_err(dev, "failed to map hwirq %d\n", i); > return -ENXIO; > } > > - ret = devm_request_irq(dev, event_irq, mc_event_handler, > - 0, event_cause[i].sym, port); > + if (evt->request_evt_irq) > + ret = evt->request_evt_irq(port, event_irq, i); > + else > + ret = devm_request_irq(dev, event_irq, plda_event_handler, > + 0, NULL, port); > if (ret) { > dev_err(dev, "failed to request IRQ %d\n", event_irq); > return ret; > @@ -694,7 +703,7 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp > } > > intx_irq = irq_create_mapping(port->event_domain, > - EVENT_LOCAL_PM_MSI_INT_INTX); > + evt->intx_evt); > if (!intx_irq) { > dev_err(dev, "failed to map INTx interrupt\n"); > return -ENXIO; > @@ -704,7 +713,7 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp > irq_set_chained_handler_and_data(intx_irq, plda_handle_intx, port); > > msi_irq = irq_create_mapping(port->event_domain, > - EVENT_LOCAL_PM_MSI_INT_MSI); > + evt->msi_evt); > if (!msi_irq) > return -ENXIO; > > @@ -717,6 +726,17 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp > return 0; > } > > +static int mc_request_evt_irq(struct plda_pcie_rp *plda, int event_irq, > + int evt) > +{ > + return devm_request_irq(plda->dev, event_irq, mc_event_handler, > + 0, event_cause[evt].sym, plda); > +} > + > +static const struct plda_pcie_ops plda_ops = { > + .get_events = get_events, > +}; This struct gets left behind in the microchip driver file, but is named "plda_ops". That doesn't make sense to me, I think it should have an "mc" prefix like other stuff in the file (and the microchip version of get_events() should also grow a prefix IMO). Thanks, Conor. > + > static int mc_platform_init(struct pci_config_window *cfg) > { > struct device *dev = cfg->parent; > @@ -724,6 +744,9 @@ static int mc_platform_init(struct pci_config_window *cfg) > void __iomem *bridge_base_addr = > port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; > struct pci_host_bridge *bridge = platform_get_drvdata(pdev); > + struct plda_evt evt = {&event_domain_ops, mc_request_evt_irq, > + EVENT_LOCAL_PM_MSI_INT_INTX, > + EVENT_LOCAL_PM_MSI_INT_MSI}; > int ret; > > /* Configure address translation table 0 for PCIe config space */ > @@ -740,7 +763,7 @@ static int mc_platform_init(struct pci_config_window *cfg) > return ret; > > /* Address translation is up; safe to enable interrupts */ > - ret = mc_init_interrupts(pdev, &port->plda); > + ret = plda_init_interrupts(pdev, &port->plda, &evt); > if (ret) > return ret; > > @@ -761,6 +784,8 @@ static int mc_host_probe(struct platform_device *pdev) > > plda = &port->plda; > plda->dev = dev; > + plda->num_events = NUM_EVENTS; > + plda->ops = &plda_ops; > > port->axi_base_addr = devm_platform_ioremap_resource(pdev, 1); > if (IS_ERR(port->axi_base_addr)) > diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h > index 315d9874b899..ef33c1365b3e 100644 > --- a/drivers/pci/controller/plda/pcie-plda.h > +++ b/drivers/pci/controller/plda/pcie-plda.h > @@ -104,6 +104,12 @@ > > #define PM_MSI_TO_MASK_OFFSET 19 > > +struct plda_pcie_rp; > + > +struct plda_pcie_ops { > + u32 (*get_events)(struct plda_pcie_rp *pcie); > +}; > + > struct plda_msi { > struct mutex lock; /* Protect used bitmap */ > struct irq_domain *msi_domain; > @@ -119,10 +125,18 @@ struct plda_pcie_rp { > struct irq_domain *event_domain; > raw_spinlock_t lock; > struct plda_msi msi; > + const struct plda_pcie_ops *ops; > void __iomem *bridge_addr; > int num_events; > }; > > +struct plda_evt { > + const struct irq_domain_ops *domain_ops; > + int (*request_evt_irq)(struct plda_pcie_rp *pcie, int evt_irq, int event); > + int intx_evt; > + int msi_evt; > +}; > + > void plda_handle_msi(struct irq_desc *desc); > int plda_allocate_msi_domains(struct plda_pcie_rp *port); > irqreturn_t plda_event_handler(int irq, void *dev_id); > -- > 2.17.1 >
On Fri, Aug 25, 2023 at 12:56:03PM +0100, Conor Dooley wrote: > Hey Minda, > > I would like Daire to take a look at this, but I have a few more > smaller comments on this. And another one that is nitpickery.. > > On Fri, Aug 25, 2023 at 05:01:25PM +0800, Minda Chen wrote: > > Rename IRQ init function and prepare for re-use > > IRQ init function. > > Add plda_pcie_ops function pointer data structure, > > PolarFire PCIe uses function pointer to get > > their events num. > > > > rename list: > > mc_init_interrupts() -> plda_init_interrupts() > > mc_pcie_init_irq_domain()-> plda_pcie_init_irq_domains() > > > > Signed-off-by: Minda Chen <minda.chen@starfivetech.com> > > --- > > .../pci/controller/plda/pcie-microchip-host.c | 49 ++++++++++++++----- > > drivers/pci/controller/plda/pcie-plda.h | 14 ++++++ > > 2 files changed, 51 insertions(+), 12 deletions(-) > > > > diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c > > index b1d5b5b3cee5..03e8e93ea7e4 100644 > > --- a/drivers/pci/controller/plda/pcie-microchip-host.c > > +++ b/drivers/pci/controller/plda/pcie-microchip-host.c > > @@ -416,7 +416,10 @@ static void mc_handle_event(struct irq_desc *desc) > > > > chained_irq_enter(chip, desc); > > > > - events = get_events(port); > > + if (port->ops && port->ops->get_events) > > + events = port->ops->get_events(port); > > + else > > + events = get_events(port); > > I don't really understand why we are going to having two different sorts > of event acquirers here. Is there a reason to not "just" register > get_events() as the default callback & remove the special casing? > > > > > for_each_set_bit(bit, &events, NUM_EVENTS) > > generic_handle_domain_irq(port->event_domain, bit); > > @@ -562,11 +565,12 @@ static int mc_pcie_init_clks(struct device *dev) > > return 0; > > } > > > > -static int mc_pcie_init_irq_domains(struct plda_pcie_rp *port) > > +static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port, struct plda_evt *evt) > > Could you just spell out the word "event" in all of these data > structures and variables? The existing code seems to always spell it > out, so its a boon for consistency too. > > > { > > struct device *dev = port->dev; > > struct device_node *node = dev->of_node; > > struct device_node *pcie_intc_node; > > + const struct irq_domain_ops *ops; > > > > /* Setup INTx */ > > pcie_intc_node = of_get_next_child(node, NULL); > > @@ -575,8 +579,9 @@ static int mc_pcie_init_irq_domains(struct plda_pcie_rp *port) > > return -EINVAL; > > } > > > > - port->event_domain = irq_domain_add_linear(pcie_intc_node, NUM_EVENTS, > > - &event_domain_ops, port); > > + ops = evt->domain_ops ? evt->domain_ops : &event_domain_ops; > > + port->event_domain = irq_domain_add_linear(pcie_intc_node, port->num_events, > > + ops, port); > > if (!port->event_domain) { > > dev_err(dev, "failed to get event domain\n"); > > of_node_put(pcie_intc_node); > > @@ -661,14 +666,15 @@ static void mc_disable_interrupts(struct mc_pcie *port) > > writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_HOST); > > } > > > > -static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp *port) > > +static int plda_init_interrupts(struct platform_device *pdev, > > + struct plda_pcie_rp *port, struct plda_evt *evt) > > { > > struct device *dev = &pdev->dev; > > int irq; > > int i, intx_irq, msi_irq, event_irq; > > int ret; > > > > - ret = mc_pcie_init_irq_domains(port); > > + ret = plda_pcie_init_irq_domains(port, evt); > > if (ret) { > > dev_err(dev, "failed creating IRQ domains\n"); > > return ret; > > @@ -678,15 +684,18 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp > > if (irq < 0) > > return -ENODEV; > > > > - for (i = 0; i < NUM_EVENTS; i++) { > > + for (i = 0; i < port->num_events; i++) { > > event_irq = irq_create_mapping(port->event_domain, i); > > if (!event_irq) { > > dev_err(dev, "failed to map hwirq %d\n", i); > > return -ENXIO; > > } > > > > - ret = devm_request_irq(dev, event_irq, mc_event_handler, > > - 0, event_cause[i].sym, port); > > + if (evt->request_evt_irq) > > + ret = evt->request_evt_irq(port, event_irq, i); > > + else > > + ret = devm_request_irq(dev, event_irq, plda_event_handler, > > + 0, NULL, port); > > if (ret) { > > dev_err(dev, "failed to request IRQ %d\n", event_irq); > > return ret; > > @@ -694,7 +703,7 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp > > } > > > > intx_irq = irq_create_mapping(port->event_domain, > > - EVENT_LOCAL_PM_MSI_INT_INTX); > > + evt->intx_evt); > > if (!intx_irq) { > > dev_err(dev, "failed to map INTx interrupt\n"); > > return -ENXIO; > > @@ -704,7 +713,7 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp > > irq_set_chained_handler_and_data(intx_irq, plda_handle_intx, port); > > > > msi_irq = irq_create_mapping(port->event_domain, > > - EVENT_LOCAL_PM_MSI_INT_MSI); > > + evt->msi_evt); > > if (!msi_irq) > > return -ENXIO; > > > > @@ -717,6 +726,17 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp > > return 0; > > } > > > > +static int mc_request_evt_irq(struct plda_pcie_rp *plda, int event_irq, > > + int evt) > > +{ > > + return devm_request_irq(plda->dev, event_irq, mc_event_handler, > > + 0, event_cause[evt].sym, plda); > > +} > > + > > +static const struct plda_pcie_ops plda_ops = { > > + .get_events = get_events, > > +}; > > This struct gets left behind in the microchip driver file, but is named > "plda_ops". That doesn't make sense to me, I think it should have an > "mc" prefix like other stuff in the file (and the microchip version of > get_events() should also grow a prefix IMO). > > Thanks, > Conor. > > > + > > static int mc_platform_init(struct pci_config_window *cfg) > > { > > struct device *dev = cfg->parent; > > @@ -724,6 +744,9 @@ static int mc_platform_init(struct pci_config_window *cfg) > > void __iomem *bridge_base_addr = > > port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; > > struct pci_host_bridge *bridge = platform_get_drvdata(pdev); > > + struct plda_evt evt = {&event_domain_ops, mc_request_evt_irq, > > + EVENT_LOCAL_PM_MSI_INT_INTX, > > + EVENT_LOCAL_PM_MSI_INT_MSI}; Isn't this the normal style for struct initialisers? struct plda_evt evt = { &event_domain_ops, mc_request_evt_irq, EVENT_LOCAL_PM_MSI_INT_INTX, EVENT_LOCAL_PM_MSI_INT_MSI }; > > int ret; > > > > /* Configure address translation table 0 for PCIe config space */ > > @@ -740,7 +763,7 @@ static int mc_platform_init(struct pci_config_window *cfg) > > return ret; > > > > /* Address translation is up; safe to enable interrupts */ > > - ret = mc_init_interrupts(pdev, &port->plda); > > + ret = plda_init_interrupts(pdev, &port->plda, &evt); > > if (ret) > > return ret; > > > > @@ -761,6 +784,8 @@ static int mc_host_probe(struct platform_device *pdev) > > > > plda = &port->plda; > > plda->dev = dev; > > + plda->num_events = NUM_EVENTS; > > + plda->ops = &plda_ops; > > > > port->axi_base_addr = devm_platform_ioremap_resource(pdev, 1); > > if (IS_ERR(port->axi_base_addr)) > > diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h > > index 315d9874b899..ef33c1365b3e 100644 > > --- a/drivers/pci/controller/plda/pcie-plda.h > > +++ b/drivers/pci/controller/plda/pcie-plda.h > > @@ -104,6 +104,12 @@ > > > > #define PM_MSI_TO_MASK_OFFSET 19 > > > > +struct plda_pcie_rp; > > + > > +struct plda_pcie_ops { > > + u32 (*get_events)(struct plda_pcie_rp *pcie); > > +}; > > + > > struct plda_msi { > > struct mutex lock; /* Protect used bitmap */ > > struct irq_domain *msi_domain; > > @@ -119,10 +125,18 @@ struct plda_pcie_rp { > > struct irq_domain *event_domain; > > raw_spinlock_t lock; > > struct plda_msi msi; > > + const struct plda_pcie_ops *ops; > > void __iomem *bridge_addr; > > int num_events; > > }; > > > > +struct plda_evt { > > + const struct irq_domain_ops *domain_ops; > > + int (*request_evt_irq)(struct plda_pcie_rp *pcie, int evt_irq, int event); > > + int intx_evt; > > + int msi_evt; > > +}; > > + > > void plda_handle_msi(struct irq_desc *desc); > > int plda_allocate_msi_domains(struct plda_pcie_rp *port); > > irqreturn_t plda_event_handler(int irq, void *dev_id); > > -- > > 2.17.1 > >
On 2023/8/25 20:05, Conor Dooley wrote: > On Fri, Aug 25, 2023 at 12:56:03PM +0100, Conor Dooley wrote: >> Hey Minda, >> >> I would like Daire to take a look at this, but I have a few more >> smaller comments on this. > > And another one that is nitpickery.. > >> >> On Fri, Aug 25, 2023 at 05:01:25PM +0800, Minda Chen wrote: >> > Rename IRQ init function and prepare for re-use >> > IRQ init function. >> > Add plda_pcie_ops function pointer data structure, >> > PolarFire PCIe uses function pointer to get >> > their events num. >> > >> > rename list: >> > mc_init_interrupts() -> plda_init_interrupts() >> > mc_pcie_init_irq_domain()-> plda_pcie_init_irq_domains() >> > >> > Signed-off-by: Minda Chen <minda.chen@starfivetech.com> >> > --- >> > .../pci/controller/plda/pcie-microchip-host.c | 49 ++++++++++++++----- >> > drivers/pci/controller/plda/pcie-plda.h | 14 ++++++ >> > 2 files changed, 51 insertions(+), 12 deletions(-) >> > >> > diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c >> > index b1d5b5b3cee5..03e8e93ea7e4 100644 >> > --- a/drivers/pci/controller/plda/pcie-microchip-host.c >> > +++ b/drivers/pci/controller/plda/pcie-microchip-host.c >> > @@ -416,7 +416,10 @@ static void mc_handle_event(struct irq_desc *desc) >> > >> > chained_irq_enter(chip, desc); >> > >> > - events = get_events(port); >> > + if (port->ops && port->ops->get_events) >> > + events = port->ops->get_events(port); >> > + else >> > + events = get_events(port); >> >> I don't really understand why we are going to having two different sorts >> of event acquirers here. Is there a reason to not "just" register >> get_events() as the default callback & remove the special casing? >> That's ok. All in get_events() callback >> > >> > for_each_set_bit(bit, &events, NUM_EVENTS) >> > generic_handle_domain_irq(port->event_domain, bit); >> > @@ -562,11 +565,12 @@ static int mc_pcie_init_clks(struct device *dev) >> > return 0; >> > } >> > >> > -static int mc_pcie_init_irq_domains(struct plda_pcie_rp *port) >> > +static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port, struct plda_evt *evt) >> >> Could you just spell out the word "event" in all of these data >> structures and variables? The existing code seems to always spell it >> out, so its a boon for consistency too. >> ok >> > { >> > struct device *dev = port->dev; >> > struct device_node *node = dev->of_node; >> > struct device_node *pcie_intc_node; >> > + const struct irq_domain_ops *ops; >> > >> > /* Setup INTx */ >> > pcie_intc_node = of_get_next_child(node, NULL); >> > @@ -575,8 +579,9 @@ static int mc_pcie_init_irq_domains(struct plda_pcie_rp *port) >> > return -EINVAL; >> > } >> > >> > - port->event_domain = irq_domain_add_linear(pcie_intc_node, NUM_EVENTS, >> > - &event_domain_ops, port); >> > + ops = evt->domain_ops ? evt->domain_ops : &event_domain_ops; >> > + port->event_domain = irq_domain_add_linear(pcie_intc_node, port->num_events, >> > + ops, port); >> > if (!port->event_domain) { >> > dev_err(dev, "failed to get event domain\n"); >> > of_node_put(pcie_intc_node); >> > @@ -661,14 +666,15 @@ static void mc_disable_interrupts(struct mc_pcie *port) >> > writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_HOST); >> > } >> > >> > -static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp *port) >> > +static int plda_init_interrupts(struct platform_device *pdev, >> > + struct plda_pcie_rp *port, struct plda_evt *evt) >> > { >> > struct device *dev = &pdev->dev; >> > int irq; >> > int i, intx_irq, msi_irq, event_irq; >> > int ret; >> > >> > - ret = mc_pcie_init_irq_domains(port); >> > + ret = plda_pcie_init_irq_domains(port, evt); >> > if (ret) { >> > dev_err(dev, "failed creating IRQ domains\n"); >> > return ret; >> > @@ -678,15 +684,18 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp >> > if (irq < 0) >> > return -ENODEV; >> > >> > - for (i = 0; i < NUM_EVENTS; i++) { >> > + for (i = 0; i < port->num_events; i++) { >> > event_irq = irq_create_mapping(port->event_domain, i); >> > if (!event_irq) { >> > dev_err(dev, "failed to map hwirq %d\n", i); >> > return -ENXIO; >> > } >> > >> > - ret = devm_request_irq(dev, event_irq, mc_event_handler, >> > - 0, event_cause[i].sym, port); >> > + if (evt->request_evt_irq) >> > + ret = evt->request_evt_irq(port, event_irq, i); >> > + else >> > + ret = devm_request_irq(dev, event_irq, plda_event_handler, >> > + 0, NULL, port); >> > if (ret) { >> > dev_err(dev, "failed to request IRQ %d\n", event_irq); >> > return ret; >> > @@ -694,7 +703,7 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp >> > } >> > >> > intx_irq = irq_create_mapping(port->event_domain, >> > - EVENT_LOCAL_PM_MSI_INT_INTX); >> > + evt->intx_evt); >> > if (!intx_irq) { >> > dev_err(dev, "failed to map INTx interrupt\n"); >> > return -ENXIO; >> > @@ -704,7 +713,7 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp >> > irq_set_chained_handler_and_data(intx_irq, plda_handle_intx, port); >> > >> > msi_irq = irq_create_mapping(port->event_domain, >> > - EVENT_LOCAL_PM_MSI_INT_MSI); >> > + evt->msi_evt); >> > if (!msi_irq) >> > return -ENXIO; >> > >> > @@ -717,6 +726,17 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp >> > return 0; >> > } >> > >> > +static int mc_request_evt_irq(struct plda_pcie_rp *plda, int event_irq, >> > + int evt) >> > +{ >> > + return devm_request_irq(plda->dev, event_irq, mc_event_handler, >> > + 0, event_cause[evt].sym, plda); >> > +} >> > + >> > +static const struct plda_pcie_ops plda_ops = { >> > + .get_events = get_events, >> > +}; >> >> This struct gets left behind in the microchip driver file, but is named >> "plda_ops". That doesn't make sense to me, I think it should have an >> "mc" prefix like other stuff in the file (and the microchip version of >> get_events() should also grow a prefix IMO). >> >> Thanks, >> Conor. >> OK. thanks. >> > + >> > static int mc_platform_init(struct pci_config_window *cfg) >> > { >> > struct device *dev = cfg->parent; >> > @@ -724,6 +744,9 @@ static int mc_platform_init(struct pci_config_window *cfg) >> > void __iomem *bridge_base_addr = >> > port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; >> > struct pci_host_bridge *bridge = platform_get_drvdata(pdev); >> > + struct plda_evt evt = {&event_domain_ops, mc_request_evt_irq, >> > + EVENT_LOCAL_PM_MSI_INT_INTX, >> > + EVENT_LOCAL_PM_MSI_INT_MSI}; > > Isn't this the normal style for struct initialisers? > struct plda_evt evt = { > &event_domain_ops, mc_request_evt_irq, > EVENT_LOCAL_PM_MSI_INT_INTX, > EVENT_LOCAL_PM_MSI_INT_MSI > }; > >> > int ret; >> > >> > /* Configure address translation table 0 for PCIe config space */ >> > @@ -740,7 +763,7 @@ static int mc_platform_init(struct pci_config_window *cfg) >> > return ret; >> > >> > /* Address translation is up; safe to enable interrupts */ >> > - ret = mc_init_interrupts(pdev, &port->plda); >> > + ret = plda_init_interrupts(pdev, &port->plda, &evt); >> > if (ret) >> > return ret; >> > >> > @@ -761,6 +784,8 @@ static int mc_host_probe(struct platform_device *pdev) >> > >> > plda = &port->plda; >> > plda->dev = dev; >> > + plda->num_events = NUM_EVENTS; >> > + plda->ops = &plda_ops; >> > >> > port->axi_base_addr = devm_platform_ioremap_resource(pdev, 1); >> > if (IS_ERR(port->axi_base_addr)) >> > diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h >> > index 315d9874b899..ef33c1365b3e 100644 >> > --- a/drivers/pci/controller/plda/pcie-plda.h >> > +++ b/drivers/pci/controller/plda/pcie-plda.h >> > @@ -104,6 +104,12 @@ >> > >> > #define PM_MSI_TO_MASK_OFFSET 19 >> > >> > +struct plda_pcie_rp; >> > + >> > +struct plda_pcie_ops { >> > + u32 (*get_events)(struct plda_pcie_rp *pcie); >> > +}; >> > + >> > struct plda_msi { >> > struct mutex lock; /* Protect used bitmap */ >> > struct irq_domain *msi_domain; >> > @@ -119,10 +125,18 @@ struct plda_pcie_rp { >> > struct irq_domain *event_domain; >> > raw_spinlock_t lock; >> > struct plda_msi msi; >> > + const struct plda_pcie_ops *ops; >> > void __iomem *bridge_addr; >> > int num_events; >> > }; >> > >> > +struct plda_evt { >> > + const struct irq_domain_ops *domain_ops; >> > + int (*request_evt_irq)(struct plda_pcie_rp *pcie, int evt_irq, int event); >> > + int intx_evt; >> > + int msi_evt; >> > +}; >> > + >> > void plda_handle_msi(struct irq_desc *desc); >> > int plda_allocate_msi_domains(struct plda_pcie_rp *port); >> > irqreturn_t plda_event_handler(int irq, void *dev_id); >> > -- >> > 2.17.1 >> > > >
diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c index b1d5b5b3cee5..03e8e93ea7e4 100644 --- a/drivers/pci/controller/plda/pcie-microchip-host.c +++ b/drivers/pci/controller/plda/pcie-microchip-host.c @@ -416,7 +416,10 @@ static void mc_handle_event(struct irq_desc *desc) chained_irq_enter(chip, desc); - events = get_events(port); + if (port->ops && port->ops->get_events) + events = port->ops->get_events(port); + else + events = get_events(port); for_each_set_bit(bit, &events, NUM_EVENTS) generic_handle_domain_irq(port->event_domain, bit); @@ -562,11 +565,12 @@ static int mc_pcie_init_clks(struct device *dev) return 0; } -static int mc_pcie_init_irq_domains(struct plda_pcie_rp *port) +static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port, struct plda_evt *evt) { struct device *dev = port->dev; struct device_node *node = dev->of_node; struct device_node *pcie_intc_node; + const struct irq_domain_ops *ops; /* Setup INTx */ pcie_intc_node = of_get_next_child(node, NULL); @@ -575,8 +579,9 @@ static int mc_pcie_init_irq_domains(struct plda_pcie_rp *port) return -EINVAL; } - port->event_domain = irq_domain_add_linear(pcie_intc_node, NUM_EVENTS, - &event_domain_ops, port); + ops = evt->domain_ops ? evt->domain_ops : &event_domain_ops; + port->event_domain = irq_domain_add_linear(pcie_intc_node, port->num_events, + ops, port); if (!port->event_domain) { dev_err(dev, "failed to get event domain\n"); of_node_put(pcie_intc_node); @@ -661,14 +666,15 @@ static void mc_disable_interrupts(struct mc_pcie *port) writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_HOST); } -static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp *port) +static int plda_init_interrupts(struct platform_device *pdev, + struct plda_pcie_rp *port, struct plda_evt *evt) { struct device *dev = &pdev->dev; int irq; int i, intx_irq, msi_irq, event_irq; int ret; - ret = mc_pcie_init_irq_domains(port); + ret = plda_pcie_init_irq_domains(port, evt); if (ret) { dev_err(dev, "failed creating IRQ domains\n"); return ret; @@ -678,15 +684,18 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp if (irq < 0) return -ENODEV; - for (i = 0; i < NUM_EVENTS; i++) { + for (i = 0; i < port->num_events; i++) { event_irq = irq_create_mapping(port->event_domain, i); if (!event_irq) { dev_err(dev, "failed to map hwirq %d\n", i); return -ENXIO; } - ret = devm_request_irq(dev, event_irq, mc_event_handler, - 0, event_cause[i].sym, port); + if (evt->request_evt_irq) + ret = evt->request_evt_irq(port, event_irq, i); + else + ret = devm_request_irq(dev, event_irq, plda_event_handler, + 0, NULL, port); if (ret) { dev_err(dev, "failed to request IRQ %d\n", event_irq); return ret; @@ -694,7 +703,7 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp } intx_irq = irq_create_mapping(port->event_domain, - EVENT_LOCAL_PM_MSI_INT_INTX); + evt->intx_evt); if (!intx_irq) { dev_err(dev, "failed to map INTx interrupt\n"); return -ENXIO; @@ -704,7 +713,7 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp irq_set_chained_handler_and_data(intx_irq, plda_handle_intx, port); msi_irq = irq_create_mapping(port->event_domain, - EVENT_LOCAL_PM_MSI_INT_MSI); + evt->msi_evt); if (!msi_irq) return -ENXIO; @@ -717,6 +726,17 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp return 0; } +static int mc_request_evt_irq(struct plda_pcie_rp *plda, int event_irq, + int evt) +{ + return devm_request_irq(plda->dev, event_irq, mc_event_handler, + 0, event_cause[evt].sym, plda); +} + +static const struct plda_pcie_ops plda_ops = { + .get_events = get_events, +}; + static int mc_platform_init(struct pci_config_window *cfg) { struct device *dev = cfg->parent; @@ -724,6 +744,9 @@ static int mc_platform_init(struct pci_config_window *cfg) void __iomem *bridge_base_addr = port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; struct pci_host_bridge *bridge = platform_get_drvdata(pdev); + struct plda_evt evt = {&event_domain_ops, mc_request_evt_irq, + EVENT_LOCAL_PM_MSI_INT_INTX, + EVENT_LOCAL_PM_MSI_INT_MSI}; int ret; /* Configure address translation table 0 for PCIe config space */ @@ -740,7 +763,7 @@ static int mc_platform_init(struct pci_config_window *cfg) return ret; /* Address translation is up; safe to enable interrupts */ - ret = mc_init_interrupts(pdev, &port->plda); + ret = plda_init_interrupts(pdev, &port->plda, &evt); if (ret) return ret; @@ -761,6 +784,8 @@ static int mc_host_probe(struct platform_device *pdev) plda = &port->plda; plda->dev = dev; + plda->num_events = NUM_EVENTS; + plda->ops = &plda_ops; port->axi_base_addr = devm_platform_ioremap_resource(pdev, 1); if (IS_ERR(port->axi_base_addr)) diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h index 315d9874b899..ef33c1365b3e 100644 --- a/drivers/pci/controller/plda/pcie-plda.h +++ b/drivers/pci/controller/plda/pcie-plda.h @@ -104,6 +104,12 @@ #define PM_MSI_TO_MASK_OFFSET 19 +struct plda_pcie_rp; + +struct plda_pcie_ops { + u32 (*get_events)(struct plda_pcie_rp *pcie); +}; + struct plda_msi { struct mutex lock; /* Protect used bitmap */ struct irq_domain *msi_domain; @@ -119,10 +125,18 @@ struct plda_pcie_rp { struct irq_domain *event_domain; raw_spinlock_t lock; struct plda_msi msi; + const struct plda_pcie_ops *ops; void __iomem *bridge_addr; int num_events; }; +struct plda_evt { + const struct irq_domain_ops *domain_ops; + int (*request_evt_irq)(struct plda_pcie_rp *pcie, int evt_irq, int event); + int intx_evt; + int msi_evt; +}; + void plda_handle_msi(struct irq_desc *desc); int plda_allocate_msi_domains(struct plda_pcie_rp *port); irqreturn_t plda_event_handler(int irq, void *dev_id);
Rename IRQ init function and prepare for re-use IRQ init function. Add plda_pcie_ops function pointer data structure, PolarFire PCIe uses function pointer to get their events num. rename list: mc_init_interrupts() -> plda_init_interrupts() mc_pcie_init_irq_domain()-> plda_pcie_init_irq_domains() Signed-off-by: Minda Chen <minda.chen@starfivetech.com> --- .../pci/controller/plda/pcie-microchip-host.c | 49 ++++++++++++++----- drivers/pci/controller/plda/pcie-plda.h | 14 ++++++ 2 files changed, 51 insertions(+), 12 deletions(-)