From: Sricharan R <sricharan-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> To: will.deacon-5wv7dgnIgG8@public.gmane.org, robin.murphy-5wv7dgnIgG8@public.gmane.org, joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org, m.szyprowski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org, tfiga-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org, srinivas.kandagatla-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org Cc: sricharan-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org Subject: [PATCH V3 4/8] drivers: platform: Configure dma operations at probe time Date: Tue, 4 Oct 2016 22:33:48 +0530 [thread overview] Message-ID: <1475600632-21289-5-git-send-email-sricharan@codeaurora.org> (raw) In-Reply-To: <1475600632-21289-1-git-send-email-sricharan-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> 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. Signed-off-by: Sricharan R <sricharan-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> --- drivers/base/dd.c | 10 ++++++++++ drivers/base/dma-mapping.c | 11 +++++++++++ drivers/of/platform.c | 4 ---- drivers/pci/probe.c | 5 +---- include/linux/dma-mapping.h | 3 +++ 5 files changed, 25 insertions(+), 8 deletions(-) diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 16688f5..cfebd48 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> @@ -353,6 +354,10 @@ 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)); @@ -395,6 +400,8 @@ 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); @@ -780,6 +787,9 @@ static void __device_release_driver(struct device *dev) dev->bus->remove(dev); else if (drv->remove) drv->remove(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 d799662..54e87f5 100644 --- a/drivers/base/dma-mapping.c +++ b/drivers/base/dma-mapping.c @@ -10,6 +10,7 @@ #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> @@ -166,6 +167,16 @@ void dmam_free_noncoherent(struct device *dev, size_t size, void *vaddr, } EXPORT_SYMBOL(dmam_free_noncoherent); +int dma_configure(struct device *dev) +{ + return of_dma_configure(dev, dev->of_node); +} + +void dma_deconfigure(struct device *dev) +{ + of_dma_deconfigure(dev); +} + #ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT static void dmam_coherent_decl_release(struct device *dev, void *res) diff --git a/drivers/of/platform.c b/drivers/of/platform.c index 9cb7090..adbd77c 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -181,11 +181,9 @@ 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; } @@ -242,7 +240,6 @@ 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); @@ -536,7 +533,6 @@ 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 93f280d..85c9553 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1724,10 +1724,7 @@ 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)) { + 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); diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 66533e1..2766dbe 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -656,6 +656,9 @@ 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
WARNING: multiple messages have this Message-ID (diff)
From: sricharan@codeaurora.org (Sricharan R) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH V3 4/8] drivers: platform: Configure dma operations at probe time Date: Tue, 4 Oct 2016 22:33:48 +0530 [thread overview] Message-ID: <1475600632-21289-5-git-send-email-sricharan@codeaurora.org> (raw) In-Reply-To: <1475600632-21289-1-git-send-email-sricharan@codeaurora.org> 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. Signed-off-by: Sricharan R <sricharan@codeaurora.org> --- drivers/base/dd.c | 10 ++++++++++ drivers/base/dma-mapping.c | 11 +++++++++++ drivers/of/platform.c | 4 ---- drivers/pci/probe.c | 5 +---- include/linux/dma-mapping.h | 3 +++ 5 files changed, 25 insertions(+), 8 deletions(-) diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 16688f5..cfebd48 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> @@ -353,6 +354,10 @@ 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)); @@ -395,6 +400,8 @@ 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); @@ -780,6 +787,9 @@ static void __device_release_driver(struct device *dev) dev->bus->remove(dev); else if (drv->remove) drv->remove(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 d799662..54e87f5 100644 --- a/drivers/base/dma-mapping.c +++ b/drivers/base/dma-mapping.c @@ -10,6 +10,7 @@ #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> @@ -166,6 +167,16 @@ void dmam_free_noncoherent(struct device *dev, size_t size, void *vaddr, } EXPORT_SYMBOL(dmam_free_noncoherent); +int dma_configure(struct device *dev) +{ + return of_dma_configure(dev, dev->of_node); +} + +void dma_deconfigure(struct device *dev) +{ + of_dma_deconfigure(dev); +} + #ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT static void dmam_coherent_decl_release(struct device *dev, void *res) diff --git a/drivers/of/platform.c b/drivers/of/platform.c index 9cb7090..adbd77c 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -181,11 +181,9 @@ 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; } @@ -242,7 +240,6 @@ 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); @@ -536,7 +533,6 @@ 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 93f280d..85c9553 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1724,10 +1724,7 @@ 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)) { + 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); diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 66533e1..2766dbe 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -656,6 +656,9 @@ 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
next prev parent reply other threads:[~2016-10-04 17:03 UTC|newest] Thread overview: 118+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <CGME20161004170414eucas1p141bebe16e1bf241862833e7ad0270c72@eucas1p1.samsung.com> 2016-10-04 17:03 ` [PATCH V3 0/8] IOMMU probe deferral support Sricharan R 2016-10-04 17:03 ` Sricharan R [not found] ` <1475600632-21289-1-git-send-email-sricharan-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> 2016-10-04 17:03 ` [PATCH V3 1/8] arm: dma-mapping: Don't override dma_ops in arch_setup_dma_ops() Sricharan R 2016-10-04 17:03 ` Sricharan R 2016-10-04 17:03 ` Sricharan R [this message] 2016-10-04 17:03 ` [PATCH V3 4/8] drivers: platform: Configure dma operations at probe time Sricharan R 2016-10-26 14:07 ` Robin Murphy 2016-10-26 14:07 ` Robin Murphy 2016-10-26 15:04 ` Sricharan 2016-10-26 15:04 ` Sricharan 2016-10-27 10:49 ` Lorenzo Pieralisi 2016-10-27 10:49 ` Lorenzo Pieralisi 2016-11-02 7:05 ` Sricharan 2016-11-02 7:05 ` Sricharan 2016-10-04 17:03 ` [PATCH V3 6/8] arm: dma-mapping: Reset the device's dma_ops Sricharan R 2016-10-04 17:03 ` Sricharan R 2016-10-26 15:07 ` Robin Murphy 2016-10-26 15:07 ` Robin Murphy [not found] ` <a3d4533f-165d-f444-7681-141479617a18-5wv7dgnIgG8@public.gmane.org> 2016-10-27 3:37 ` Sricharan 2016-10-27 3:37 ` Sricharan 2017-05-23 16:25 ` Russell King - ARM Linux 2017-05-23 16:25 ` Russell King - ARM Linux [not found] ` <20170523162507.GA1729-l+eeeJia6m9URfEZ8mYm6t73F7V6hmMc@public.gmane.org> 2017-05-23 16:55 ` Robin Murphy 2017-05-23 16:55 ` Robin Murphy 2017-05-23 17:53 ` Russell King - ARM Linux 2017-05-23 17:53 ` Russell King - ARM Linux [not found] ` <20170523175319.GA22219-l+eeeJia6m9URfEZ8mYm6t73F7V6hmMc@public.gmane.org> 2017-05-23 21:46 ` Laurent Pinchart 2017-05-23 21:46 ` Laurent Pinchart 2017-05-23 22:42 ` Russell King - ARM Linux 2017-05-23 22:42 ` Russell King - ARM Linux [not found] ` <20170523224216.GI22219-l+eeeJia6m9URfEZ8mYm6t73F7V6hmMc@public.gmane.org> 2017-05-24 10:31 ` Sricharan R 2017-05-24 10:31 ` Sricharan R [not found] ` <c4ad7341-fa9f-81b7-a41c-417144c4f842-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> 2017-05-24 11:26 ` Laurent Pinchart 2017-05-24 11:26 ` Laurent Pinchart 2017-05-24 11:38 ` Sricharan R 2017-05-24 11:38 ` Sricharan R 2017-05-25 15:05 ` Russell King - ARM Linux 2017-05-25 15:05 ` Russell King - ARM Linux [not found] ` <20170525150540.GJ22219-l+eeeJia6m9URfEZ8mYm6t73F7V6hmMc@public.gmane.org> 2017-05-26 5:18 ` Sricharan R 2017-05-26 5:18 ` Sricharan R 2017-05-26 14:04 ` Laurent Pinchart 2017-05-26 14:04 ` Laurent Pinchart 2016-10-10 12:36 ` [PATCH V3 0/8] IOMMU probe deferral support Marek Szyprowski 2016-10-10 12:36 ` Marek Szyprowski 2016-10-17 6:58 ` Sricharan 2016-10-17 6:58 ` Sricharan [not found] ` <12cfb59f-f7ca-d4df-eb7f-42348e357979-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> 2016-10-12 6:24 ` Sricharan 2016-10-12 6:24 ` Sricharan 2016-10-24 6:34 ` Marek Szyprowski 2016-10-24 6:34 ` Marek Szyprowski [not found] ` <b9e4e81f-3b3e-951f-df62-d640275aae71-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> 2016-10-24 12:30 ` Sricharan 2016-10-24 12:30 ` Sricharan 2016-10-17 7:02 ` Sricharan 2016-10-17 7:02 ` Sricharan 2016-10-25 6:25 ` Archit Taneja 2016-10-25 6:25 ` Archit Taneja 2016-10-04 17:03 ` [PATCH V3 2/8] of: dma: Move range size workaround to of_dma_get_range() Sricharan R 2016-10-04 17:03 ` Sricharan R 2016-10-04 17:03 ` [PATCH V3 3/8] of: dma: Make of_dma_deconfigure() public Sricharan R 2016-10-04 17:03 ` Sricharan R 2016-10-04 17:03 ` [PATCH V3 5/8] iommu: of: Handle IOMMU lookup failure with deferred probing or error Sricharan R 2016-10-04 17:03 ` Sricharan R [not found] ` <1475600632-21289-6-git-send-email-sricharan-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> 2016-10-26 14:52 ` Robin Murphy 2016-10-26 14:52 ` Robin Murphy [not found] ` <f08e65b4-f755-897c-f776-40f0d6788251-5wv7dgnIgG8@public.gmane.org> 2016-10-27 2:55 ` Sricharan 2016-10-27 2:55 ` Sricharan 2016-10-04 17:03 ` [PATCH V3 7/8] arm/arm64: dma-mapping: Call iommu's remove_device callback during device detach Sricharan R 2016-10-04 17:03 ` Sricharan R [not found] ` <1475600632-21289-8-git-send-email-sricharan-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> 2016-10-26 15:16 ` Robin Murphy 2016-10-26 15:16 ` Robin Murphy 2016-10-27 5:16 ` Sricharan 2016-10-27 5:16 ` Sricharan 2016-10-04 17:03 ` [PATCH V3 8/8] arm64: dma-mapping: Remove the notifier trick to handle early setting of dma_ops Sricharan R 2016-10-04 17:03 ` Sricharan R [not found] ` <1475600632-21289-9-git-send-email-sricharan-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> 2016-10-07 15:40 ` Sricharan 2016-10-07 15:40 ` Sricharan 2016-10-26 15:34 ` Robin Murphy 2016-10-26 15:34 ` Robin Murphy 2016-10-27 5:19 ` Sricharan 2016-10-27 5:19 ` Sricharan 2016-10-25 14:35 ` [PATCH V3 0/8] IOMMU probe deferral support Robin Murphy 2016-10-25 14:35 ` Robin Murphy [not found] ` <60ee8066-f167-e9df-ae3e-4138f1133bad-5wv7dgnIgG8@public.gmane.org> 2016-10-26 14:44 ` Sricharan 2016-10-26 14:44 ` Sricharan 2016-10-26 17:14 ` Robin Murphy 2016-10-26 17:14 ` Robin Murphy [not found] ` <421e2b14-0231-d376-02a0-097423120b3d-5wv7dgnIgG8@public.gmane.org> 2016-10-27 8:37 ` Sricharan 2016-10-27 8:37 ` Sricharan 2016-11-03 22:25 ` Sricharan 2016-11-03 22:25 ` Sricharan 2016-11-04 15:16 ` Sricharan 2016-11-04 15:16 ` Sricharan 2016-11-07 19:13 ` Will Deacon 2016-11-07 19:13 ` Will Deacon 2016-11-07 19:22 ` Robin Murphy 2016-11-07 19:22 ` Robin Murphy 2016-11-09 6:24 ` Sricharan 2016-11-09 6:24 ` Sricharan 2016-11-09 16:59 ` Will Deacon 2016-11-09 16:59 ` Will Deacon 2016-11-14 3:41 ` Sricharan 2016-11-14 3:41 ` Sricharan 2016-11-20 15:11 ` Sricharan 2016-11-20 15:11 ` Sricharan 2016-11-23 19:54 ` Robin Murphy 2016-11-23 19:54 ` Robin Murphy [not found] ` <918128b9-cdb0-1454-000a-146cee7a05ea-5wv7dgnIgG8@public.gmane.org> 2016-11-24 16:10 ` Sricharan 2016-11-24 16:10 ` Sricharan 2016-11-24 19:11 ` Robin Murphy 2016-11-24 19:11 ` Robin Murphy 2016-11-28 17:42 ` Sricharan 2016-11-28 17:42 ` Sricharan 2016-11-28 18:13 ` Lorenzo Pieralisi 2016-11-28 18:13 ` Lorenzo Pieralisi 2016-11-30 0:34 ` Sricharan 2016-11-30 0:34 ` Sricharan 2016-11-30 12:07 ` Lorenzo Pieralisi 2016-11-30 12:07 ` Lorenzo Pieralisi
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