Merge: [RHEL 9.7] DMAEngine subsystem update

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/6590

# 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 to v6.14 merge window and current fixes.
* FLR support for idxd.
* Various fixes and clean up.

Note: AMD qdma driver isn't being enabled, it just made it a simple cherry-pick to backport the
re-org of ptdma driver into the amd directory, which will make future backports to ptdma apply cleanly.

## Approved Development Ticket(s)

JIRA: https://issues.redhat.com/browse/RHEL-47414
JIRA: https://issues.redhat.com/browse/RHEL-78706

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: Augusto Caringi <acaringi@redhat.com>

Author: caringi

MAINTAINERS

@@ -1061,8 +1061,16 @@ F:	drivers/cpufreq/amd-pstate*
 AMD PTDMA DRIVER
 M:	Sanjay R Mehta <sanju.mehta@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>
+M:	Lizhi Hou <lizhi.hou@amd.com>
+L:	dmaengine@vger.kernel.org
+S:	Supported
+F:	drivers/dma/amd/qdma/
+F:	include/linux/platform_data/amd_qdma.h
 
 AMD SEATTLE DEVICE TREE SUPPORT
 M:	Brijesh Singh <brijeshkumar.singh@amd.com>

drivers/dma/Kconfig

@@ -747,12 +747,12 @@ config XILINX_ZYNQMP_DPDMA
 	  display driver.
 
 # driver files
+source "drivers/dma/amd/Kconfig"
+
 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_AT_HDMAC) += at_hdmac.o
 obj-$(CONFIG_AT_XDMAC) += at_xdmac.o
 obj-$(CONFIG_AXI_DMAC) += dma-axi-dmac.o
@@ -83,6 +82,7 @@ obj-$(CONFIG_ST_FDMA) += st_fdma.o
 obj-$(CONFIG_FSL_DPAA2_QDMA) += fsl-dpaa2-qdma/
 obj-$(CONFIG_INTEL_LDMA) += lgm/
 
+obj-y += amd/
 obj-y += mediatek/
 obj-y += qcom/
 obj-y += ti/

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);
@@ -228,7 +231,7 @@ 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);
 }
@@ -251,37 +254,15 @@ 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/ptdma/Kconfig renamed to drivers/dma/amd/Kconfig

@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0-only
+#
 config AMD_PTDMA
 	tristate  "AMD PassThru DMA Engine"
 	depends on X86_64 && PCI
@@ -11,3 +12,16 @@ config AMD_PTDMA
 	  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"
+	depends on HAS_IOMEM
+	select DMA_ENGINE
+	select DMA_VIRTUAL_CHANNELS
+	select REGMAP_MMIO
+	help
+	  Enable support for the AMD Queue-based DMA subsystem. The primary
+	  mechanism to transfer data using the QDMA is for the QDMA engine to
+	  operate on instructions (descriptors) provided by the host operating
+	  system. Using the descriptors, the QDMA can move data in either the
+	  Host to Card (H2C) direction or the Card to Host (C2H) direction.

drivers/dma/amd/Makefile

@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_AMD_PTDMA) += ptdma/
+obj-$(CONFIG_AMD_QDMA) += qdma/

drivers/dma/ptdma/Makefile renamed to drivers/dma/amd/ptdma/Makefile

@@ -10,8 +10,7 @@
  */
 
 #include "ptdma.h"
-#include "../dmaengine.h"
-#include "../virt-dma.h"
+#include "../../dmaengine.h"
 
 static inline struct pt_dma_chan *to_pt_chan(struct dma_chan *dma_chan)
 {