| Message ID | 1485188293-20263-7-git-send-email-sricharan@codeaurora.org (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On Mon, Jan 23, 2017 at 09:48:08PM +0530, Sricharan R wrote: > Configuring DMA ops at probe time will allow deferring device probe when > the IOMMU isn't available yet. The dma_configure for the device is > now called from the generic device_attach callback just before the > bus/driver probe is called. This way, configuring the DMA ops for the > device would be called at the same place for all bus_types, hence the > deferred probing mechanism should work for all buses as well. > > pci_bus_add_devices (platform/amba)(_device_create/driver_register) > | | > pci_bus_add_device (device_add/driver_register) > | | > device_attach device_initial_probe > | | > __device_attach_driver __device_attach_driver > | > driver_probe_device > | > really_probe > | > dma_configure > > Similarly on the device/driver_unregister path __device_release_driver is > called which inturn calls dma_deconfigure. > > This patch changes the dma ops configuration to probe time for > both OF and ACPI based platform/amba/pci bus devices. > > Signed-off-by: Sricharan R <sricharan@codeaurora.org> Acked-by: Bjorn Helgaas <bhelgaas@google.com> (drivers/pci part) > --- > [V6 .. V7] > * Updated the subject and commit log as per comments > > [V5 .. V6] > * Squashed in patch 10 for configuring the dma ops of > ACPI device at probe time from previous post. > * Fixed a bug in dma_configure pointed out by Robin. > > drivers/acpi/glue.c | 5 ----- > drivers/base/dd.c | 9 +++++++++ > drivers/base/dma-mapping.c | 40 ++++++++++++++++++++++++++++++++++++++++ > drivers/of/platform.c | 5 +---- > drivers/pci/probe.c | 28 ---------------------------- > include/linux/dma-mapping.h | 3 +++ > 6 files changed, 53 insertions(+), 37 deletions(-) > > diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c > index fb19e1c..c05f241 100644 > --- a/drivers/acpi/glue.c > +++ b/drivers/acpi/glue.c > @@ -176,7 +176,6 @@ int acpi_bind_one(struct device *dev, struct acpi_device *acpi_dev) > struct list_head *physnode_list; > unsigned int node_id; > int retval = -EINVAL; > - enum dev_dma_attr attr; > > if (has_acpi_companion(dev)) { > if (acpi_dev) { > @@ -233,10 +232,6 @@ int acpi_bind_one(struct device *dev, struct acpi_device *acpi_dev) > if (!has_acpi_companion(dev)) > ACPI_COMPANION_SET(dev, acpi_dev); > > - attr = acpi_get_dma_attr(acpi_dev); > - if (attr != DEV_DMA_NOT_SUPPORTED) > - acpi_dma_configure(dev, attr); > - > acpi_physnode_link_name(physical_node_name, node_id); > retval = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj, > physical_node_name); > diff --git a/drivers/base/dd.c b/drivers/base/dd.c > index a1fbf55..4882f06 100644 > --- a/drivers/base/dd.c > +++ b/drivers/base/dd.c > @@ -19,6 +19,7 @@ > > #include <linux/device.h> > #include <linux/delay.h> > +#include <linux/dma-mapping.h> > #include <linux/module.h> > #include <linux/kthread.h> > #include <linux/wait.h> > @@ -356,6 +357,10 @@ static int really_probe(struct device *dev, struct device_driver *drv) > if (ret) > goto pinctrl_bind_failed; > > + ret = dma_configure(dev); > + if (ret) > + goto dma_failed; > + > if (driver_sysfs_add(dev)) { > printk(KERN_ERR "%s: driver_sysfs_add(%s) failed\n", > __func__, dev_name(dev)); > @@ -417,6 +422,8 @@ static int really_probe(struct device *dev, struct device_driver *drv) > goto done; > > probe_failed: > + dma_deconfigure(dev); > +dma_failed: > if (dev->bus) > blocking_notifier_call_chain(&dev->bus->p->bus_notifier, > BUS_NOTIFY_DRIVER_NOT_BOUND, dev); > @@ -826,6 +833,8 @@ static void __device_release_driver(struct device *dev, struct device *parent) > drv->remove(dev); > > device_links_driver_cleanup(dev); > + dma_deconfigure(dev); > + > devres_release_all(dev); > dev->driver = NULL; > dev_set_drvdata(dev, NULL); > diff --git a/drivers/base/dma-mapping.c b/drivers/base/dma-mapping.c > index efd71cf..449b948 100644 > --- a/drivers/base/dma-mapping.c > +++ b/drivers/base/dma-mapping.c > @@ -7,9 +7,11 @@ > * This file is released under the GPLv2. > */ > > +#include <linux/acpi.h> > #include <linux/dma-mapping.h> > #include <linux/export.h> > #include <linux/gfp.h> > +#include <linux/of_device.h> > #include <linux/slab.h> > #include <linux/vmalloc.h> > > @@ -341,3 +343,41 @@ void dma_common_free_remap(void *cpu_addr, size_t size, unsigned long vm_flags) > vunmap(cpu_addr); > } > #endif > + > +/* > + * Common configuration to enable DMA API use for a device > + */ > +#include <linux/pci.h> > + > +int dma_configure(struct device *dev) > +{ > + struct device *bridge = NULL, *dma_dev = dev; > + enum dev_dma_attr attr; > + > + if (dev_is_pci(dev)) { > + bridge = pci_get_host_bridge_device(to_pci_dev(dev)); > + dma_dev = bridge; > + if (IS_ENABLED(CONFIG_OF) && dma_dev->parent && > + dma_dev->parent->of_node) > + dma_dev = dma_dev->parent; > + } > + > + if (dma_dev->of_node) { > + of_dma_configure(dev, dma_dev->of_node); > + } else if (has_acpi_companion(dma_dev)) { > + attr = acpi_get_dma_attr(to_acpi_device_node(dma_dev->fwnode)); > + if (attr != DEV_DMA_NOT_SUPPORTED) > + acpi_dma_configure(dev, attr); > + } > + > + if (bridge) > + pci_put_host_bridge_device(bridge); > + > + return 0; > +} > + > +void dma_deconfigure(struct device *dev) > +{ > + of_dma_deconfigure(dev); > + acpi_dma_deconfigure(dev); > +} > diff --git a/drivers/of/platform.c b/drivers/of/platform.c > index 57418f7..cf35030 100644 > --- a/drivers/of/platform.c > +++ b/drivers/of/platform.c > @@ -22,6 +22,7 @@ > #include <linux/slab.h> > #include <linux/of_address.h> > #include <linux/of_device.h> > +#include <linux/of_iommu.h> > #include <linux/of_irq.h> > #include <linux/of_platform.h> > #include <linux/platform_device.h> > @@ -186,11 +187,9 @@ static struct platform_device *of_platform_device_create_pdata( > > dev->dev.bus = &platform_bus_type; > dev->dev.platform_data = platform_data; > - of_dma_configure(&dev->dev, dev->dev.of_node); > of_msi_configure(&dev->dev, dev->dev.of_node); > > if (of_device_add(dev) != 0) { > - of_dma_deconfigure(&dev->dev); > platform_device_put(dev); > goto err_clear_flag; > } > @@ -248,7 +247,6 @@ static struct amba_device *of_amba_device_create(struct device_node *node, > dev_set_name(&dev->dev, "%s", bus_id); > else > of_device_make_bus_id(&dev->dev); > - of_dma_configure(&dev->dev, dev->dev.of_node); > > /* Allow the HW Peripheral ID to be overridden */ > prop = of_get_property(node, "arm,primecell-periphid", NULL); > @@ -542,7 +540,6 @@ static int of_platform_device_destroy(struct device *dev, void *data) > amba_device_unregister(to_amba_device(dev)); > #endif > > - of_dma_deconfigure(dev); > of_node_clear_flag(dev->of_node, OF_POPULATED); > of_node_clear_flag(dev->of_node, OF_POPULATED_BUS); > return 0; > diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c > index 204960e..89ebb6c 100644 > --- a/drivers/pci/probe.c > +++ b/drivers/pci/probe.c > @@ -1864,33 +1864,6 @@ static void pci_set_msi_domain(struct pci_dev *dev) > dev_set_msi_domain(&dev->dev, d); > } > > -/** > - * pci_dma_configure - Setup DMA configuration > - * @dev: ptr to pci_dev struct of the PCI device > - * > - * Function to update PCI devices's DMA configuration using the same > - * info from the OF node or ACPI node of host bridge's parent (if any). > - */ > -static void pci_dma_configure(struct pci_dev *dev) > -{ > - struct device *bridge = pci_get_host_bridge_device(dev); > - > - if (IS_ENABLED(CONFIG_OF) && > - bridge->parent && bridge->parent->of_node) { > - of_dma_configure(&dev->dev, bridge->parent->of_node); > - } else if (has_acpi_companion(bridge)) { > - struct acpi_device *adev = to_acpi_device_node(bridge->fwnode); > - enum dev_dma_attr attr = acpi_get_dma_attr(adev); > - > - if (attr == DEV_DMA_NOT_SUPPORTED) > - dev_warn(&dev->dev, "DMA not supported.\n"); > - else > - acpi_dma_configure(&dev->dev, attr); > - } > - > - pci_put_host_bridge_device(bridge); > -} > - > void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) > { > int ret; > @@ -1904,7 +1877,6 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) > dev->dev.dma_mask = &dev->dma_mask; > dev->dev.dma_parms = &dev->dma_parms; > dev->dev.coherent_dma_mask = 0xffffffffull; > - pci_dma_configure(dev); > > pci_set_dma_max_seg_size(dev, 65536); > pci_set_dma_seg_boundary(dev, 0xffffffff); > diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h > index 10c5a17b1..939bf77 100644 > --- a/include/linux/dma-mapping.h > +++ b/include/linux/dma-mapping.h > @@ -708,6 +708,9 @@ void *dma_mark_declared_memory_occupied(struct device *dev, > } > #endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */ > > +int dma_configure(struct device *dev); > +void dma_deconfigure(struct device *dev); > + > /* > * Managed DMA API > */ > -- > QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation > > -- > To unsubscribe from this list: send the line "unsubscribe linux-acpi" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Mon, Jan 23, 2017 at 5:18 PM, Sricharan R <sricharan@codeaurora.org> wrote: > Configuring DMA ops at probe time will allow deferring device probe when > the IOMMU isn't available yet. The dma_configure for the device is > now called from the generic device_attach callback just before the > bus/driver probe is called. This way, configuring the DMA ops for the > device would be called at the same place for all bus_types, hence the > deferred probing mechanism should work for all buses as well. > > pci_bus_add_devices (platform/amba)(_device_create/driver_register) > | | > pci_bus_add_device (device_add/driver_register) > | | > device_attach device_initial_probe > | | > __device_attach_driver __device_attach_driver > | > driver_probe_device > | > really_probe > | > dma_configure > > Similarly on the device/driver_unregister path __device_release_driver is > called which inturn calls dma_deconfigure. > > This patch changes the dma ops configuration to probe time for > both OF and ACPI based platform/amba/pci bus devices. > > Signed-off-by: Sricharan R <sricharan@codeaurora.org> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c index fb19e1c..c05f241 100644 --- a/drivers/acpi/glue.c +++ b/drivers/acpi/glue.c @@ -176,7 +176,6 @@ int acpi_bind_one(struct device *dev, struct acpi_device *acpi_dev) struct list_head *physnode_list; unsigned int node_id; int retval = -EINVAL; - enum dev_dma_attr attr; if (has_acpi_companion(dev)) { if (acpi_dev) { @@ -233,10 +232,6 @@ int acpi_bind_one(struct device *dev, struct acpi_device *acpi_dev) if (!has_acpi_companion(dev)) ACPI_COMPANION_SET(dev, acpi_dev); - attr = acpi_get_dma_attr(acpi_dev); - if (attr != DEV_DMA_NOT_SUPPORTED) - acpi_dma_configure(dev, attr); - acpi_physnode_link_name(physical_node_name, node_id); retval = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj, physical_node_name); diff --git a/drivers/base/dd.c b/drivers/base/dd.c index a1fbf55..4882f06 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -19,6 +19,7 @@ #include <linux/device.h> #include <linux/delay.h> +#include <linux/dma-mapping.h> #include <linux/module.h> #include <linux/kthread.h> #include <linux/wait.h> @@ -356,6 +357,10 @@ static int really_probe(struct device *dev, struct device_driver *drv) if (ret) goto pinctrl_bind_failed; + ret = dma_configure(dev); + if (ret) + goto dma_failed; + if (driver_sysfs_add(dev)) { printk(KERN_ERR "%s: driver_sysfs_add(%s) failed\n", __func__, dev_name(dev)); @@ -417,6 +422,8 @@ static int really_probe(struct device *dev, struct device_driver *drv) goto done; probe_failed: + dma_deconfigure(dev); +dma_failed: if (dev->bus) blocking_notifier_call_chain(&dev->bus->p->bus_notifier, BUS_NOTIFY_DRIVER_NOT_BOUND, dev); @@ -826,6 +833,8 @@ static void __device_release_driver(struct device *dev, struct device *parent) drv->remove(dev); device_links_driver_cleanup(dev); + dma_deconfigure(dev); + devres_release_all(dev); dev->driver = NULL; dev_set_drvdata(dev, NULL); diff --git a/drivers/base/dma-mapping.c b/drivers/base/dma-mapping.c index efd71cf..449b948 100644 --- a/drivers/base/dma-mapping.c +++ b/drivers/base/dma-mapping.c @@ -7,9 +7,11 @@ * This file is released under the GPLv2. */ +#include <linux/acpi.h> #include <linux/dma-mapping.h> #include <linux/export.h> #include <linux/gfp.h> +#include <linux/of_device.h> #include <linux/slab.h> #include <linux/vmalloc.h> @@ -341,3 +343,41 @@ void dma_common_free_remap(void *cpu_addr, size_t size, unsigned long vm_flags) vunmap(cpu_addr); } #endif + +/* + * Common configuration to enable DMA API use for a device + */ +#include <linux/pci.h> + +int dma_configure(struct device *dev) +{ + struct device *bridge = NULL, *dma_dev = dev; + enum dev_dma_attr attr; + + if (dev_is_pci(dev)) { + bridge = pci_get_host_bridge_device(to_pci_dev(dev)); + dma_dev = bridge; + if (IS_ENABLED(CONFIG_OF) && dma_dev->parent && + dma_dev->parent->of_node) + dma_dev = dma_dev->parent; + } + + if (dma_dev->of_node) { + of_dma_configure(dev, dma_dev->of_node); + } else if (has_acpi_companion(dma_dev)) { + attr = acpi_get_dma_attr(to_acpi_device_node(dma_dev->fwnode)); + if (attr != DEV_DMA_NOT_SUPPORTED) + acpi_dma_configure(dev, attr); + } + + if (bridge) + pci_put_host_bridge_device(bridge); + + return 0; +} + +void dma_deconfigure(struct device *dev) +{ + of_dma_deconfigure(dev); + acpi_dma_deconfigure(dev); +} diff --git a/drivers/of/platform.c b/drivers/of/platform.c index 57418f7..cf35030 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -22,6 +22,7 @@ #include <linux/slab.h> #include <linux/of_address.h> #include <linux/of_device.h> +#include <linux/of_iommu.h> #include <linux/of_irq.h> #include <linux/of_platform.h> #include <linux/platform_device.h> @@ -186,11 +187,9 @@ static struct platform_device *of_platform_device_create_pdata( dev->dev.bus = &platform_bus_type; dev->dev.platform_data = platform_data; - of_dma_configure(&dev->dev, dev->dev.of_node); of_msi_configure(&dev->dev, dev->dev.of_node); if (of_device_add(dev) != 0) { - of_dma_deconfigure(&dev->dev); platform_device_put(dev); goto err_clear_flag; } @@ -248,7 +247,6 @@ static struct amba_device *of_amba_device_create(struct device_node *node, dev_set_name(&dev->dev, "%s", bus_id); else of_device_make_bus_id(&dev->dev); - of_dma_configure(&dev->dev, dev->dev.of_node); /* Allow the HW Peripheral ID to be overridden */ prop = of_get_property(node, "arm,primecell-periphid", NULL); @@ -542,7 +540,6 @@ static int of_platform_device_destroy(struct device *dev, void *data) amba_device_unregister(to_amba_device(dev)); #endif - of_dma_deconfigure(dev); of_node_clear_flag(dev->of_node, OF_POPULATED); of_node_clear_flag(dev->of_node, OF_POPULATED_BUS); return 0; diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 204960e..89ebb6c 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1864,33 +1864,6 @@ static void pci_set_msi_domain(struct pci_dev *dev) dev_set_msi_domain(&dev->dev, d); } -/** - * pci_dma_configure - Setup DMA configuration - * @dev: ptr to pci_dev struct of the PCI device - * - * Function to update PCI devices's DMA configuration using the same - * info from the OF node or ACPI node of host bridge's parent (if any). - */ -static void pci_dma_configure(struct pci_dev *dev) -{ - struct device *bridge = pci_get_host_bridge_device(dev); - - if (IS_ENABLED(CONFIG_OF) && - bridge->parent && bridge->parent->of_node) { - of_dma_configure(&dev->dev, bridge->parent->of_node); - } else if (has_acpi_companion(bridge)) { - struct acpi_device *adev = to_acpi_device_node(bridge->fwnode); - enum dev_dma_attr attr = acpi_get_dma_attr(adev); - - if (attr == DEV_DMA_NOT_SUPPORTED) - dev_warn(&dev->dev, "DMA not supported.\n"); - else - acpi_dma_configure(&dev->dev, attr); - } - - pci_put_host_bridge_device(bridge); -} - void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) { int ret; @@ -1904,7 +1877,6 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) dev->dev.dma_mask = &dev->dma_mask; dev->dev.dma_parms = &dev->dma_parms; dev->dev.coherent_dma_mask = 0xffffffffull; - pci_dma_configure(dev); pci_set_dma_max_seg_size(dev, 65536); pci_set_dma_seg_boundary(dev, 0xffffffff); diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 10c5a17b1..939bf77 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -708,6 +708,9 @@ void *dma_mark_declared_memory_occupied(struct device *dev, } #endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */ +int dma_configure(struct device *dev); +void dma_deconfigure(struct device *dev); + /* * Managed DMA API */
Configuring DMA ops at probe time will allow deferring device probe when the IOMMU isn't available yet. The dma_configure for the device is now called from the generic device_attach callback just before the bus/driver probe is called. This way, configuring the DMA ops for the device would be called at the same place for all bus_types, hence the deferred probing mechanism should work for all buses as well. pci_bus_add_devices (platform/amba)(_device_create/driver_register) | | pci_bus_add_device (device_add/driver_register) | | device_attach device_initial_probe | | __device_attach_driver __device_attach_driver | driver_probe_device | really_probe | dma_configure Similarly on the device/driver_unregister path __device_release_driver is called which inturn calls dma_deconfigure. This patch changes the dma ops configuration to probe time for both OF and ACPI based platform/amba/pci bus devices. Signed-off-by: Sricharan R <sricharan@codeaurora.org> --- [V6 .. V7] * Updated the subject and commit log as per comments [V5 .. V6] * Squashed in patch 10 for configuring the dma ops of ACPI device at probe time from previous post. * Fixed a bug in dma_configure pointed out by Robin. drivers/acpi/glue.c | 5 ----- drivers/base/dd.c | 9 +++++++++ drivers/base/dma-mapping.c | 40 ++++++++++++++++++++++++++++++++++++++++ drivers/of/platform.c | 5 +---- drivers/pci/probe.c | 28 ---------------------------- include/linux/dma-mapping.h | 3 +++ 6 files changed, 53 insertions(+), 37 deletions(-)