Merge: [RHEL 10.1] DMAEngine subsystem update

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10/-/merge_requests/595

# Merge Request Required Information

Upstream-Status: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Upstream-Status: git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git
                 next branch
## Summary of Changes

Update through v6.14 merge window.
* Function level reset support for idxd
* Various clean ups and fixes
* ae4dma driver and ptdma support for ae4dma functionality

## Approved Development Ticket(s)

JIRA: https://issues.redhat.com/browse/RHEL-47413
JIRA: https://issues.redhat.com/browse/RHEL-78703

Signed-off-by: Jerry Snitselaar <jsnitsel@redhat.com>

Approved-by: Eder Zulian <ezulian@redhat.com>
Approved-by: Eric Chanudet <echanude@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: Julio Faracco <jfaracco@redhat.com>

Author: jcfaracco

Documentation/driver-api/driver-model/devres.rst

@@ -458,7 +458,6 @@ SERDEV
 
 SLAVE DMA ENGINE
   devm_acpi_dma_controller_register()
-  devm_acpi_dma_controller_free()
 
 SPI
   devm_spi_alloc_master()

MAINTAINERS

@@ -1156,8 +1156,8 @@ F:	tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py
 AMD PTDMA DRIVER
 M:	Basavaraj Natikar <Basavaraj.Natikar@amd.com>
 L:	dmaengine@vger.kernel.org
-S:	Maintained
-F:	drivers/dma/ptdma/
+S:	Supported
+F:	drivers/dma/amd/ptdma/
 
 AMD QDMA DRIVER
 M:	Nishad Saraf <nishads@amd.com>

drivers/dma/Kconfig

@@ -740,8 +740,6 @@ source "drivers/dma/bestcomm/Kconfig"
 
 source "drivers/dma/mediatek/Kconfig"
 
-source "drivers/dma/ptdma/Kconfig"
-
 source "drivers/dma/qcom/Kconfig"
 
 source "drivers/dma/dw/Kconfig"

drivers/dma/Makefile

@@ -16,7 +16,6 @@ obj-$(CONFIG_DMATEST) += dmatest.o
 obj-$(CONFIG_ALTERA_MSGDMA) += altera-msgdma.o
 obj-$(CONFIG_AMBA_PL08X) += amba-pl08x.o
 obj-$(CONFIG_AMCC_PPC440SPE_ADMA) += ppc4xx/
-obj-$(CONFIG_AMD_PTDMA) += ptdma/
 obj-$(CONFIG_APPLE_ADMAC) += apple-admac.o
 obj-$(CONFIG_AT_HDMAC) += at_hdmac.o
 obj-$(CONFIG_AT_XDMAC) += at_xdmac.o

drivers/dma/acpi-dma.c

@@ -9,18 +9,21 @@
  *	    Mika Westerberg <mika.westerberg@linux.intel.com>
  */
 
+#include <linux/acpi.h>
+#include <linux/acpi_dma.h>
 #include <linux/device.h>
 #include <linux/dma-mapping.h>
 #include <linux/err.h>
-#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/export.h>
+#include <linux/ioport.h>
 #include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
-#include <linux/slab.h>
-#include <linux/ioport.h>
-#include <linux/acpi.h>
-#include <linux/acpi_dma.h>
 #include <linux/property.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/types.h>
 
 static LIST_HEAD(acpi_dma_list);
 static DEFINE_MUTEX(acpi_dma_lock);
@@ -236,7 +239,7 @@ int acpi_dma_controller_free(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(acpi_dma_controller_free);
 
-static void devm_acpi_dma_release(struct device *dev, void *res)
+static void devm_acpi_dma_free(void *dev)
 {
 	acpi_dma_controller_free(dev);
 }
@@ -259,37 +262,15 @@ int devm_acpi_dma_controller_register(struct device *dev,
 		(struct acpi_dma_spec *, struct acpi_dma *),
 		void *data)
 {
-	void *res;
 	int ret;
 
-	res = devres_alloc(devm_acpi_dma_release, 0, GFP_KERNEL);
-	if (!res)
-		return -ENOMEM;
-
 	ret = acpi_dma_controller_register(dev, acpi_dma_xlate, data);
-	if (ret) {
-		devres_free(res);
+	if (ret)
 		return ret;
-	}
-	devres_add(dev, res);
-	return 0;
-}
-EXPORT_SYMBOL_GPL(devm_acpi_dma_controller_register);
 
-/**
- * devm_acpi_dma_controller_free - resource managed acpi_dma_controller_free()
- * @dev:	device that is unregistering as DMA controller
- *
- * Unregister a DMA controller registered with
- * devm_acpi_dma_controller_register(). Normally this function will not need to
- * be called and the resource management code will ensure that the resource is
- * freed.
- */
-void devm_acpi_dma_controller_free(struct device *dev)
-{
-	WARN_ON(devres_release(dev, devm_acpi_dma_release, NULL, NULL));
+	return devm_add_action_or_reset(dev, devm_acpi_dma_free, dev);
 }
-EXPORT_SYMBOL_GPL(devm_acpi_dma_controller_free);
+EXPORT_SYMBOL_GPL(devm_acpi_dma_controller_register);
 
 /**
  * acpi_dma_update_dma_spec - prepare dma specifier to pass to translation function

drivers/dma/altera-msgdma.c

@@ -954,7 +954,7 @@ static struct platform_driver msgdma_driver = {
 		.of_match_table = of_match_ptr(msgdma_match),
 	},
 	.probe = msgdma_probe,
-	.remove_new = msgdma_remove,
+	.remove = msgdma_remove,
 };
 
 module_platform_driver(msgdma_driver);

drivers/dma/amd/Kconfig

@@ -1,4 +1,17 @@
 # SPDX-License-Identifier: GPL-2.0-only
+#
+config AMD_PTDMA
+	tristate  "AMD PassThru DMA Engine"
+	depends on X86_64 && PCI
+	select DMA_ENGINE
+	select DMA_VIRTUAL_CHANNELS
+	help
+	  Enable support for the AMD PTDMA controller. This controller
+	  provides DMA capabilities to perform high bandwidth memory to
+	  memory and IO copy operations. It performs DMA transfer through
+	  queue-based descriptor management. This DMA controller is intended
+	  to be used with AMD Non-Transparent Bridge devices and not for
+	  general purpose peripheral DMA.
 
 config AMD_QDMA
 	tristate "AMD Queue-based DMA"

drivers/dma/amd/Makefile

@@ -1,3 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
 
+obj-$(CONFIG_AMD_PTDMA) += ptdma/
 obj-$(CONFIG_AMD_QDMA) += qdma/