[PATCH V8 0/7] dmaengine: qcom_hidma: add support for bugfixed HW

[PATCH V8 0/7] dmaengine: qcom_hidma: add support for bugfixed HW

[Sinan Kaya]

Introduce new ACPI and OF device ids for thw HW along with the helper
functions.

Changes from v7:
* rebase to 4.15-rc1

Sinan Kaya (7):
  Documentation: DT: qcom_hidma: Bump HW revision for the bugfixed HW
  ACPI / bus: Introduce acpi_get_match_data() function
  device property: Introduce a common API to fetch device match data
  OF: properties: Implement get_match_data() callback
  ACPI: properties: Implement get_match_data() callback
  dmaengine: qcom_hidma: Add support for the new revision
  dmaengine: qcom_hidma: Add identity register support

 .../devicetree/bindings/dma/qcom_hidma_mgmt.txt    |  4 +--
 drivers/acpi/bus.c                                 | 18 ++++++++++
 drivers/acpi/property.c                            |  8 +++++
 drivers/base/property.c                            |  7 ++++
 drivers/dma/qcom/hidma.c                           | 41 ++++++++++------------
 drivers/of/property.c                              |  8 +++++
 include/linux/acpi.h                               |  6 ++++
 include/linux/fwnode.h                             |  4 +++
 include/linux/property.h                           |  2 ++
 9 files changed, 74 insertions(+), 24 deletions(-)

-- 
1.9.1

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[PATCH V8 1/7] Documentation: DT: qcom_hidma: Bump HW revision for the bugfixed HW

[Sinan Kaya]

A new version of the HIDMA IP has been released with bug fixes. Bumping the
hardware version to differentiate from others.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 Documentation/devicetree/bindings/dma/qcom_hidma_mgmt.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/dma/qcom_hidma_mgmt.txt b/Documentation/devicetree/bindings/dma/qcom_hidma_mgmt.txt
index 55492c2..5d93d6d 100644
--- a/Documentation/devicetree/bindings/dma/qcom_hidma_mgmt.txt
+++ b/Documentation/devicetree/bindings/dma/qcom_hidma_mgmt.txt
@@ -47,8 +47,8 @@ When the OS is not in control of the management interface (i.e. it's a guest),
 the channel nodes appear on their own, not under a management node.
 
 Required properties:
-- compatible: must contain "qcom,hidma-1.0" for initial HW or "qcom,hidma-1.1"
-for MSI capable HW.
+- compatible: must contain "qcom,hidma-1.0" for initial HW or
+  "qcom,hidma-1.1"/"qcom,hidma-1.2" for MSI capable HW.
 - reg: Addresses for the transfer and event channel
 - interrupts: Should contain the event interrupt
 - desc-count: Number of asynchronous requests this channel can handle
-- 
1.9.1

[PATCH V8 2/7] ACPI / bus: Introduce acpi_get_match_data() function

[Sinan Kaya]

OF has of_device_get_match_data() function to extract driver specific data
structure. Add a similar function for ACPI.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/bus.c   | 18 ++++++++++++++++++
 include/linux/acpi.h |  6 ++++++
 2 files changed, 24 insertions(+)

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 4d0979e..f87ed3b 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -785,6 +785,24 @@ const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
 }
 EXPORT_SYMBOL_GPL(acpi_match_device);
 
+void *acpi_get_match_data(const struct device *dev)
+{
+	const struct acpi_device_id *match;
+
+	if (!dev->driver)
+		return NULL;
+
+	if (!dev->driver->acpi_match_table)
+		return NULL;
+
+	match = acpi_match_device(dev->driver->acpi_match_table, dev);
+	if (!match)
+		return NULL;
+
+	return (void *)match->driver_data;
+}
+EXPORT_SYMBOL_GPL(acpi_get_match_data);
+
 int acpi_match_device_ids(struct acpi_device *device,
 			  const struct acpi_device_id *ids)
 {
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index dc1ebfe..9278737 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -584,6 +584,7 @@ extern int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *),
 const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
 					       const struct device *dev);
 
+void *acpi_get_match_data(const struct device *dev);
 extern bool acpi_driver_match_device(struct device *dev,
 				     const struct device_driver *drv);
 int acpi_device_uevent_modalias(struct device *, struct kobj_uevent_env *);
@@ -755,6 +756,11 @@ static inline const struct acpi_device_id *acpi_match_device(
 	return NULL;
 }
 
+static inline void *acpi_get_match_data(const struct device *dev)
+{
+	return NULL;
+}
+
 static inline bool acpi_driver_match_device(struct device *dev,
 					    const struct device_driver *drv)
 {
-- 
1.9.1

[PATCH V8 3/7] device property: Introduce a common API to fetch device match data

[Sinan Kaya]

There is an OF/ACPI function to obtain the driver data. We want to hide
OF/ACPI details from the device drivers and abstract following the device
family of functions.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/base/property.c  | 7 +++++++
 include/linux/fwnode.h   | 4 ++++
 include/linux/property.h | 2 ++
 3 files changed, 13 insertions(+)

diff --git a/drivers/base/property.c b/drivers/base/property.c
index 851b1b6..09eaac9 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -1340,3 +1340,10 @@ int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
 	return fwnode_call_int_op(fwnode, graph_parse_endpoint, endpoint);
 }
 EXPORT_SYMBOL(fwnode_graph_parse_endpoint);
+
+void *device_get_match_data(struct device *dev)
+{
+	return fwnode_call_ptr_op(dev_fwnode(dev), device_get_match_data,
+				  dev);
+}
+EXPORT_SYMBOL_GPL(device_get_match_data);
diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h
index 411a84c..4fa1a48 100644
--- a/include/linux/fwnode.h
+++ b/include/linux/fwnode.h
@@ -15,6 +15,7 @@
 #include <linux/types.h>
 
 struct fwnode_operations;
+struct device;
 
 struct fwnode_handle {
 	struct fwnode_handle *secondary;
@@ -51,6 +52,7 @@ struct fwnode_reference_args {
  * struct fwnode_operations - Operations for fwnode interface
  * @get: Get a reference to an fwnode.
  * @put: Put a reference to an fwnode.
+ * @device_get_match_data: Return the device driver match data.
  * @property_present: Return true if a property is present.
  * @property_read_integer_array: Read an array of integer properties. Return
  *				 zero on success, a negative error code
@@ -71,6 +73,8 @@ struct fwnode_operations {
 	struct fwnode_handle *(*get)(struct fwnode_handle *fwnode);
 	void (*put)(struct fwnode_handle *fwnode);
 	bool (*device_is_available)(const struct fwnode_handle *fwnode);
+	void *(*device_get_match_data)(const struct fwnode_handle *fwnode,
+				       const struct device *dev);
 	bool (*property_present)(const struct fwnode_handle *fwnode,
 				 const char *propname);
 	int (*property_read_int_array)(const struct fwnode_handle *fwnode,
diff --git a/include/linux/property.h b/include/linux/property.h
index f6189a3..6653ed4 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -275,6 +275,8 @@ int device_add_properties(struct device *dev,
 
 enum dev_dma_attr device_get_dma_attr(struct device *dev);
 
+void *device_get_match_data(struct device *dev);
+
 int device_get_phy_mode(struct device *dev);
 
 void *device_get_mac_address(struct device *dev, char *addr, int alen);
-- 
1.9.1

[PATCH V8 4/7] OF: properties: Implement get_match_data() callback

[Sinan Kaya]

Now that we have a get_match_data() callback as part of the firmware node,
implement the OF specific piece for it.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/of/property.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/of/property.c b/drivers/of/property.c
index 8ad33a4..f25d363 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c
@@ -981,10 +981,18 @@ static int of_fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
 	return 0;
 }
 
+static void *
+of_fwnode_device_get_match_data(const struct fwnode_handle *fwnode,
+				const struct device *dev)
+{
+	return (void *)of_device_get_match_data(dev);
+}
+
 const struct fwnode_operations of_fwnode_ops = {
 	.get = of_fwnode_get,
 	.put = of_fwnode_put,
 	.device_is_available = of_fwnode_device_is_available,
+	.device_get_match_data = of_fwnode_device_get_match_data,
 	.property_present = of_fwnode_property_present,
 	.property_read_int_array = of_fwnode_property_read_int_array,
 	.property_read_string_array = of_fwnode_property_read_string_array,
-- 
1.9.1

[PATCH V8 5/7] ACPI: properties: Implement get_match_data() callback

[Sinan Kaya]

Now that we have a get_match_data() callback as part of the firmware node,
implement the ACPI specific piece for it.

Signed-off-by: Sinan Kaya <okaya-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Acked-by: Sakari Ailus <sakari.ailus-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
---
 drivers/acpi/property.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index e26ea20..466d150 100644
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -1271,9 +1271,17 @@ static int acpi_fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
 	return 0;
 }
 
+static void *
+acpi_fwnode_device_get_match_data(const struct fwnode_handle *fwnode,
+				  const struct device *dev)
+{
+	return acpi_get_match_data(dev);
+}
+
 #define DECLARE_ACPI_FWNODE_OPS(ops) \
 	const struct fwnode_operations ops = {				\
 		.device_is_available = acpi_fwnode_device_is_available, \
+		.device_get_match_data = acpi_fwnode_device_get_match_data, \
 		.property_present = acpi_fwnode_property_present,	\
 		.property_read_int_array =				\
 			acpi_fwnode_property_read_int_array,		\
-- 
1.9.1

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[PATCH V8 6/7] dmaengine: qcom_hidma: Add support for the new revision

[Sinan Kaya]

Add support for probing the newer HW and also organize MSI capable hardware
into an array for maintenance reasons.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
---
 drivers/dma/qcom/hidma.c | 34 +++++++++++++---------------------
 1 file changed, 13 insertions(+), 21 deletions(-)

diff --git a/drivers/dma/qcom/hidma.c b/drivers/dma/qcom/hidma.c
index e366985..c146c6d 100644
--- a/drivers/dma/qcom/hidma.c
+++ b/drivers/dma/qcom/hidma.c
@@ -50,6 +50,7 @@
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/of_dma.h>
+#include <linux/of_device.h>
 #include <linux/property.h>
 #include <linux/delay.h>
 #include <linux/acpi.h>
@@ -104,6 +105,9 @@ static void hidma_free(struct hidma_dev *dmadev)
 module_param(nr_desc_prm, uint, 0644);
 MODULE_PARM_DESC(nr_desc_prm, "number of descriptors (default: 0)");
 
+enum hidma_cap {
+	HIDMA_MSI_CAP = 1,
+};
 
 /* process completed descriptors */
 static void hidma_process_completed(struct hidma_chan *mchan)
@@ -736,25 +740,12 @@ static int hidma_request_msi(struct hidma_dev *dmadev,
 #endif
 }
 
-static bool hidma_msi_capable(struct device *dev)
+static bool hidma_test_capability(struct device *dev, enum hidma_cap test_cap)
 {
-	struct acpi_device *adev = ACPI_COMPANION(dev);
-	const char *of_compat;
-	int ret = -EINVAL;
-
-	if (!adev || acpi_disabled) {
-		ret = device_property_read_string(dev, "compatible",
-						  &of_compat);
-		if (ret)
-			return false;
+	enum hidma_cap cap;
 
-		ret = strcmp(of_compat, "qcom,hidma-1.1");
-	} else {
-#ifdef CONFIG_ACPI
-		ret = strcmp(acpi_device_hid(adev), "QCOM8062");
-#endif
-	}
-	return ret == 0;
+	cap = (enum hidma_cap) device_get_match_data(dev);
+	return cap ? ((cap & test_cap) > 0) : 0;
 }
 
 static int hidma_probe(struct platform_device *pdev)
@@ -834,8 +825,7 @@ static int hidma_probe(struct platform_device *pdev)
 	 * Determine the MSI capability of the platform. Old HW doesn't
 	 * support MSI.
 	 */
-	msi = hidma_msi_capable(&pdev->dev);
-
+	msi = hidma_test_capability(&pdev->dev, HIDMA_MSI_CAP);
 	device_property_read_u32(&pdev->dev, "desc-count",
 				 &dmadev->nr_descriptors);
 
@@ -953,7 +943,8 @@ static int hidma_remove(struct platform_device *pdev)
 #if IS_ENABLED(CONFIG_ACPI)
 static const struct acpi_device_id hidma_acpi_ids[] = {
 	{"QCOM8061"},
-	{"QCOM8062"},
+	{"QCOM8062", HIDMA_MSI_CAP},
+	{"QCOM8063", HIDMA_MSI_CAP},
 	{},
 };
 MODULE_DEVICE_TABLE(acpi, hidma_acpi_ids);
@@ -961,7 +952,8 @@ static int hidma_remove(struct platform_device *pdev)
 
 static const struct of_device_id hidma_match[] = {
 	{.compatible = "qcom,hidma-1.0",},
-	{.compatible = "qcom,hidma-1.1",},
+	{.compatible = "qcom,hidma-1.1", .data = (void *)(HIDMA_MSI_CAP),},
+	{.compatible = "qcom,hidma-1.2", .data = (void *)(HIDMA_MSI_CAP),},
 	{},
 };
 MODULE_DEVICE_TABLE(of, hidma_match);
-- 
1.9.1

[PATCH V8 7/7] dmaengine: qcom_hidma: Add identity register support

[Sinan Kaya]

The location for destination event channel register has been relocated from
offset 0x28 to 0x40. Update the code accordingly.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
---
 drivers/dma/qcom/hidma.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/dma/qcom/hidma.c b/drivers/dma/qcom/hidma.c
index c146c6d..963cc52 100644
--- a/drivers/dma/qcom/hidma.c
+++ b/drivers/dma/qcom/hidma.c
@@ -107,6 +107,7 @@ static void hidma_free(struct hidma_dev *dmadev)
 
 enum hidma_cap {
 	HIDMA_MSI_CAP = 1,
+	HIDMA_IDENTITY_CAP,
 };
 
 /* process completed descriptors */
@@ -838,7 +839,10 @@ static int hidma_probe(struct platform_device *pdev)
 	if (!dmadev->nr_descriptors)
 		dmadev->nr_descriptors = HIDMA_NR_DEFAULT_DESC;
 
-	dmadev->chidx = readl(dmadev->dev_trca + 0x28);
+	if (hidma_test_capability(&pdev->dev, HIDMA_IDENTITY_CAP))
+		dmadev->chidx = readl(dmadev->dev_trca + 0x40);
+	else
+		dmadev->chidx = readl(dmadev->dev_trca + 0x28);
 
 	/* Set DMA mask to 64 bits. */
 	rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
@@ -944,7 +948,7 @@ static int hidma_remove(struct platform_device *pdev)
 static const struct acpi_device_id hidma_acpi_ids[] = {
 	{"QCOM8061"},
 	{"QCOM8062", HIDMA_MSI_CAP},
-	{"QCOM8063", HIDMA_MSI_CAP},
+	{"QCOM8063", (HIDMA_MSI_CAP | HIDMA_IDENTITY_CAP)},
 	{},
 };
 MODULE_DEVICE_TABLE(acpi, hidma_acpi_ids);
@@ -953,7 +957,8 @@ static int hidma_remove(struct platform_device *pdev)
 static const struct of_device_id hidma_match[] = {
 	{.compatible = "qcom,hidma-1.0",},
 	{.compatible = "qcom,hidma-1.1", .data = (void *)(HIDMA_MSI_CAP),},
-	{.compatible = "qcom,hidma-1.2", .data = (void *)(HIDMA_MSI_CAP),},
+	{.compatible = "qcom,hidma-1.2",
+	 .data = (void *)(HIDMA_MSI_CAP | HIDMA_IDENTITY_CAP),},
 	{},
 };
 MODULE_DEVICE_TABLE(of, hidma_match);
-- 
1.9.1

Re: [PATCH V8 0/7] dmaengine: qcom_hidma: add support for bugfixed HW

[Vinod Koul]

On Wed, Dec 13, 2017 at 02:20:46AM -0500, Sinan Kaya wrote:
> Introduce new ACPI and OF device ids for thw HW along with the helper
> functions.

Applied, thanks

-- 
~Vinod