[PATCH v5 1/4] fpga: dfl: reorganize to subdir layout

[trix@redhat.com]

From: Tom Rix <trix@redhat.com>

Follow drivers/net/ethernet/ which has control configs
NET_VENDOR_BLA that map to drivers/net/ethernet/bla
Since fpgas do not have many vendors, drop the 'VENDOR' and use
FPGA_BLA.

There are several new subdirs
altera/
dfl/
lattice/
xilinx/

Each subdir has a Kconfig that has a new/reused

if FPGA_BLA
  ... existing configs ...
endif FPGA_BLA

Which is sourced into the main fpga/Kconfig

Each subdir has a Makefile whose transversal is controlled in the
fpga/Makefile by

obj-$(CONFIG_FPGA_BLA) += bla/

This is the dfl/ subdir part.

Create a dfl/ subdir
Move dfl-* files to it.
Add a Kconfig and Makefile

Because FPGA_DFL is now used in dfl/Kconfig in a if/endif
block, all the other configs in dfl/Kconfig implicitly depend
on FPGA_DFL.

Signed-off-by: Tom Rix <trix@redhat.com>
---
 Documentation/fpga/dfl.rst                  |  4 +-
 MAINTAINERS                                 |  2 +-
 drivers/fpga/Kconfig                        | 80 +-------------------
 drivers/fpga/Makefile                       | 18 +----
 drivers/fpga/dfl/Kconfig                    | 83 +++++++++++++++++++++
 drivers/fpga/dfl/Makefile                   | 16 ++++
 drivers/fpga/{ => dfl}/dfl-afu-dma-region.c |  0
 drivers/fpga/{ => dfl}/dfl-afu-error.c      |  0
 drivers/fpga/{ => dfl}/dfl-afu-main.c       |  0
 drivers/fpga/{ => dfl}/dfl-afu-region.c     |  0
 drivers/fpga/{ => dfl}/dfl-afu.h            |  0
 drivers/fpga/{ => dfl}/dfl-fme-br.c         |  0
 drivers/fpga/{ => dfl}/dfl-fme-error.c      |  0
 drivers/fpga/{ => dfl}/dfl-fme-main.c       |  0
 drivers/fpga/{ => dfl}/dfl-fme-mgr.c        |  0
 drivers/fpga/{ => dfl}/dfl-fme-perf.c       |  0
 drivers/fpga/{ => dfl}/dfl-fme-pr.c         |  0
 drivers/fpga/{ => dfl}/dfl-fme-pr.h         |  0
 drivers/fpga/{ => dfl}/dfl-fme-region.c     |  0
 drivers/fpga/{ => dfl}/dfl-fme.h            |  0
 drivers/fpga/{ => dfl}/dfl-n3000-nios.c     |  0
 drivers/fpga/{ => dfl}/dfl-pci.c            |  0
 drivers/fpga/{ => dfl}/dfl.c                |  0
 drivers/fpga/{ => dfl}/dfl.h                |  0
 24 files changed, 104 insertions(+), 99 deletions(-)
 create mode 100644 drivers/fpga/dfl/Kconfig
 create mode 100644 drivers/fpga/dfl/Makefile
 rename drivers/fpga/{ => dfl}/dfl-afu-dma-region.c (100%)
 rename drivers/fpga/{ => dfl}/dfl-afu-error.c (100%)
 rename drivers/fpga/{ => dfl}/dfl-afu-main.c (100%)
 rename drivers/fpga/{ => dfl}/dfl-afu-region.c (100%)
 rename drivers/fpga/{ => dfl}/dfl-afu.h (100%)
 rename drivers/fpga/{ => dfl}/dfl-fme-br.c (100%)
 rename drivers/fpga/{ => dfl}/dfl-fme-error.c (100%)
 rename drivers/fpga/{ => dfl}/dfl-fme-main.c (100%)
 rename drivers/fpga/{ => dfl}/dfl-fme-mgr.c (100%)
 rename drivers/fpga/{ => dfl}/dfl-fme-perf.c (100%)
 rename drivers/fpga/{ => dfl}/dfl-fme-pr.c (100%)
 rename drivers/fpga/{ => dfl}/dfl-fme-pr.h (100%)
 rename drivers/fpga/{ => dfl}/dfl-fme-region.c (100%)
 rename drivers/fpga/{ => dfl}/dfl-fme.h (100%)
 rename drivers/fpga/{ => dfl}/dfl-n3000-nios.c (100%)
 rename drivers/fpga/{ => dfl}/dfl-pci.c (100%)
 rename drivers/fpga/{ => dfl}/dfl.c (100%)
 rename drivers/fpga/{ => dfl}/dfl.h (100%)

diff --git a/Documentation/fpga/dfl.rst b/Documentation/fpga/dfl.rst
index ef9eec71f6f3a..532fdc2e7d623 100644
--- a/Documentation/fpga/dfl.rst
+++ b/Documentation/fpga/dfl.rst
@@ -210,7 +210,7 @@ device and etc. Its driver module is always loaded first once the device is
 created by the system. This driver plays an infrastructural role in the
 driver architecture. It locates the DFLs in the device memory, handles them
 and related resources to common interfaces from DFL framework for enumeration.
-(Please refer to drivers/fpga/dfl.c for detailed enumeration APIs).
+(Please refer to drivers/fpga/dfl/dfl.c for detailed enumeration APIs).
 
 The FPGA Management Engine (FME) driver is a platform driver which is loaded
 automatically after FME platform device creation from the DFL device module. It
@@ -499,7 +499,7 @@ In some cases, we may need to add some new private features to existing FIUs
 framework, as each private feature will be parsed automatically and related
 mmio resources can be found under FIU platform device created by DFL framework.
 Developer only needs to provide a sub feature driver with matched feature id.
-FME Partial Reconfiguration Sub Feature driver (see drivers/fpga/dfl-fme-pr.c)
+FME Partial Reconfiguration Sub Feature driver (see drivers/fpga/dfl/dfl-fme-pr.c)
 could be a reference.
 
 Location of DFLs on a PCI Device
diff --git a/MAINTAINERS b/MAINTAINERS
index 9ae47618c857d..853997f755083 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7244,7 +7244,7 @@ L:	linux-fpga@vger.kernel.org
 S:	Maintained
 F:	Documentation/ABI/testing/sysfs-bus-dfl*
 F:	Documentation/fpga/dfl.rst
-F:	drivers/fpga/dfl*
+F:	drivers/fpga/dfl/
 F:	drivers/uio/uio_dfl.c
 F:	include/linux/dfl.h
 F:	include/uapi/linux/fpga-dfl.h
diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
index 8cd454ee20c0c..7a290b2234576 100644
--- a/drivers/fpga/Kconfig
+++ b/drivers/fpga/Kconfig
@@ -145,85 +145,7 @@ config OF_FPGA_REGION
 	  Support for loading FPGA images by applying a Device Tree
 	  overlay.
 
-config FPGA_DFL
-	tristate "FPGA Device Feature List (DFL) support"
-	select FPGA_BRIDGE
-	select FPGA_REGION
-	depends on HAS_IOMEM
-	help
-	  Device Feature List (DFL) defines a feature list structure that
-	  creates a linked list of feature headers within the MMIO space
-	  to provide an extensible way of adding features for FPGA.
-	  Driver can walk through the feature headers to enumerate feature
-	  devices (e.g. FPGA Management Engine, Port and Accelerator
-	  Function Unit) and their private features for target FPGA devices.
-
-	  Select this option to enable common support for Field-Programmable
-	  Gate Array (FPGA) solutions which implement Device Feature List.
-	  It provides enumeration APIs and feature device infrastructure.
-
-config FPGA_DFL_FME
-	tristate "FPGA DFL FME Driver"
-	depends on FPGA_DFL && HWMON && PERF_EVENTS
-	help
-	  The FPGA Management Engine (FME) is a feature device implemented
-	  under Device Feature List (DFL) framework. Select this option to
-	  enable the platform device driver for FME which implements all
-	  FPGA platform level management features. There shall be one FME
-	  per DFL based FPGA device.
-
-config FPGA_DFL_FME_MGR
-	tristate "FPGA DFL FME Manager Driver"
-	depends on FPGA_DFL_FME && HAS_IOMEM
-	help
-	  Say Y to enable FPGA Manager driver for FPGA Management Engine.
-
-config FPGA_DFL_FME_BRIDGE
-	tristate "FPGA DFL FME Bridge Driver"
-	depends on FPGA_DFL_FME && HAS_IOMEM
-	help
-	  Say Y to enable FPGA Bridge driver for FPGA Management Engine.
-
-config FPGA_DFL_FME_REGION
-	tristate "FPGA DFL FME Region Driver"
-	depends on FPGA_DFL_FME && HAS_IOMEM
-	help
-	  Say Y to enable FPGA Region driver for FPGA Management Engine.
-
-config FPGA_DFL_AFU
-	tristate "FPGA DFL AFU Driver"
-	depends on FPGA_DFL
-	help
-	  This is the driver for FPGA Accelerated Function Unit (AFU) which
-	  implements AFU and Port management features. A User AFU connects
-	  to the FPGA infrastructure via a Port. There may be more than one
-	  Port/AFU per DFL based FPGA device.
-
-config FPGA_DFL_NIOS_INTEL_PAC_N3000
-	tristate "FPGA DFL NIOS Driver for Intel PAC N3000"
-	depends on FPGA_DFL
-	select REGMAP
-	help
-	  This is the driver for the N3000 Nios private feature on Intel
-	  PAC (Programmable Acceleration Card) N3000. It communicates
-	  with the embedded Nios processor to configure the retimers on
-	  the card. It also instantiates the SPI master (spi-altera) for
-	  the card's BMC (Board Management Controller).
-
-config FPGA_DFL_PCI
-	tristate "FPGA DFL PCIe Device Driver"
-	depends on PCI && FPGA_DFL
-	help
-	  Select this option to enable PCIe driver for PCIe-based
-	  Field-Programmable Gate Array (FPGA) solutions which implement
-	  the Device Feature List (DFL). This driver provides interfaces
-	  for userspace applications to configure, enumerate, open and access
-	  FPGA accelerators on the FPGA DFL devices, enables system level
-	  management functions such as FPGA partial reconfiguration, power
-	  management and virtualization with DFL framework and DFL feature
-	  device drivers.
-
-	  To compile this as a module, choose M here.
+source "drivers/fpga/dfl/Kconfig"
 
 config FPGA_MGR_ZYNQMP_FPGA
 	tristate "Xilinx ZynqMP FPGA"
diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
index 18dc9885883a2..bda74e54ce390 100644
--- a/drivers/fpga/Makefile
+++ b/drivers/fpga/Makefile
@@ -31,20 +31,4 @@ obj-$(CONFIG_XILINX_PR_DECOUPLER)	+= xilinx-pr-decoupler.o
 obj-$(CONFIG_FPGA_REGION)		+= fpga-region.o
 obj-$(CONFIG_OF_FPGA_REGION)		+= of-fpga-region.o
 
-# FPGA Device Feature List Support
-obj-$(CONFIG_FPGA_DFL)			+= dfl.o
-obj-$(CONFIG_FPGA_DFL_FME)		+= dfl-fme.o
-obj-$(CONFIG_FPGA_DFL_FME_MGR)		+= dfl-fme-mgr.o
-obj-$(CONFIG_FPGA_DFL_FME_BRIDGE)	+= dfl-fme-br.o
-obj-$(CONFIG_FPGA_DFL_FME_REGION)	+= dfl-fme-region.o
-obj-$(CONFIG_FPGA_DFL_AFU)		+= dfl-afu.o
-
-dfl-fme-objs := dfl-fme-main.o dfl-fme-pr.o dfl-fme-error.o
-dfl-fme-objs += dfl-fme-perf.o
-dfl-afu-objs := dfl-afu-main.o dfl-afu-region.o dfl-afu-dma-region.o
-dfl-afu-objs += dfl-afu-error.o
-
-obj-$(CONFIG_FPGA_DFL_NIOS_INTEL_PAC_N3000)	+= dfl-n3000-nios.o
-
-# Drivers for FPGAs which implement DFL
-obj-$(CONFIG_FPGA_DFL_PCI)		+= dfl-pci.o
+obj-$(CONFIG_FPGA_DFL) += dfl/
diff --git a/drivers/fpga/dfl/Kconfig b/drivers/fpga/dfl/Kconfig
new file mode 100644
index 0000000000000..4c95e9072db46
--- /dev/null
+++ b/drivers/fpga/dfl/Kconfig
@@ -0,0 +1,83 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config FPGA_DFL
+	tristate "FPGA Device Feature List (DFL) support"
+	select FPGA_BRIDGE
+	select FPGA_REGION
+	depends on HAS_IOMEM
+	help
+	  Device Feature List (DFL) defines a feature list structure that
+	  creates a linked list of feature headers within the MMIO space
+	  to provide an extensible way of adding features for FPGA.
+	  Driver can walk through the feature headers to enumerate feature
+	  devices (e.g. FPGA Management Engine, Port and Accelerator
+	  Function Unit) and their private features for target FPGA devices.
+
+	  Select this option to enable common support for Field-Programmable
+	  Gate Array (FPGA) solutions which implement Device Feature List.
+	  It provides enumeration APIs and feature device infrastructure.
+
+if FPGA_DFL
+
+config FPGA_DFL_FME
+	tristate "FPGA DFL FME Driver"
+	depends on HWMON && PERF_EVENTS
+	help
+	  The FPGA Management Engine (FME) is a feature device implemented
+	  under Device Feature List (DFL) framework. Select this option to
+	  enable the platform device driver for FME which implements all
+	  FPGA platform level management features. There shall be one FME
+	  per DFL based FPGA device.
+
+config FPGA_DFL_FME_MGR
+	tristate "FPGA DFL FME Manager Driver"
+	depends on FPGA_DFL_FME && HAS_IOMEM
+	help
+	  Say Y to enable FPGA Manager driver for FPGA Management Engine.
+
+config FPGA_DFL_FME_BRIDGE
+	tristate "FPGA DFL FME Bridge Driver"
+	depends on FPGA_DFL_FME && HAS_IOMEM
+	help
+	  Say Y to enable FPGA Bridge driver for FPGA Management Engine.
+
+config FPGA_DFL_FME_REGION
+	tristate "FPGA DFL FME Region Driver"
+	depends on FPGA_DFL_FME && HAS_IOMEM
+	help
+	  Say Y to enable FPGA Region driver for FPGA Management Engine.
+
+config FPGA_DFL_AFU
+	tristate "FPGA DFL AFU Driver"
+	help
+	  This is the driver for FPGA Accelerated Function Unit (AFU) which
+	  implements AFU and Port management features. A User AFU connects
+	  to the FPGA infrastructure via a Port. There may be more than one
+	  Port/AFU per DFL based FPGA device.
+
+config FPGA_DFL_NIOS_INTEL_PAC_N3000
+	tristate "FPGA DFL NIOS Driver for Intel PAC N3000"
+	select REGMAP
+	help
+	  This is the driver for the N3000 Nios private feature on Intel
+	  PAC (Programmable Acceleration Card) N3000. It communicates
+	  with the embedded Nios processor to configure the retimers on
+	  the card. It also instantiates the SPI master (spi-altera) for
+	  the card's BMC (Board Management Controller).
+
+config FPGA_DFL_PCI
+	tristate "FPGA DFL PCIe Device Driver"
+	depends on PCI
+	help
+	  Select this option to enable PCIe driver for PCIe-based
+	  Field-Programmable Gate Array (FPGA) solutions which implement
+	  the Device Feature List (DFL). This driver provides interfaces
+	  for userspace applications to configure, enumerate, open and access
+	  FPGA accelerators on the FPGA DFL devices, enables system level
+	  management functions such as FPGA partial reconfiguration, power
+	  management and virtualization with DFL framework and DFL feature
+	  device drivers.
+
+	  To compile this as a module, choose M here.
+
+endif #FPGA_DFL
diff --git a/drivers/fpga/dfl/Makefile b/drivers/fpga/dfl/Makefile
new file mode 100644
index 0000000000000..1c22507c60aa0
--- /dev/null
+++ b/drivers/fpga/dfl/Makefile
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# FPGA Device Feature List (DFL) Support
+obj-$(CONFIG_FPGA_DFL) += dfl.o
+obj-$(CONFIG_FPGA_DFL_AFU) += dfl-afu.o
+obj-$(CONFIG_FPGA_DFL_FME) += dfl-fme.o
+obj-$(CONFIG_FPGA_DFL_FME_BRIDGE) += dfl-fme-br.o
+obj-$(CONFIG_FPGA_DFL_FME_MGR) += dfl-fme-mgr.o
+obj-$(CONFIG_FPGA_DFL_FME_REGION) += dfl-fme-region.o
+obj-$(CONFIG_FPGA_DFL_NIOS_INTEL_PAC_N3000) += dfl-n3000-nios.o
+obj-$(CONFIG_FPGA_DFL_PCI) += dfl-pci.o
+
+dfl-fme-objs := dfl-fme-main.o dfl-fme-pr.o dfl-fme-error.o		\
+                dfl-fme-perf.o
+dfl-afu-objs := dfl-afu-main.o dfl-afu-region.o dfl-afu-dma-region.o	\
+                dfl-afu-error.o
diff --git a/drivers/fpga/dfl-afu-dma-region.c b/drivers/fpga/dfl/dfl-afu-dma-region.c
similarity index 100%
rename from drivers/fpga/dfl-afu-dma-region.c
rename to drivers/fpga/dfl/dfl-afu-dma-region.c
diff --git a/drivers/fpga/dfl-afu-error.c b/drivers/fpga/dfl/dfl-afu-error.c
similarity index 100%
rename from drivers/fpga/dfl-afu-error.c
rename to drivers/fpga/dfl/dfl-afu-error.c
diff --git a/drivers/fpga/dfl-afu-main.c b/drivers/fpga/dfl/dfl-afu-main.c
similarity index 100%
rename from drivers/fpga/dfl-afu-main.c
rename to drivers/fpga/dfl/dfl-afu-main.c
diff --git a/drivers/fpga/dfl-afu-region.c b/drivers/fpga/dfl/dfl-afu-region.c
similarity index 100%
rename from drivers/fpga/dfl-afu-region.c
rename to drivers/fpga/dfl/dfl-afu-region.c
diff --git a/drivers/fpga/dfl-afu.h b/drivers/fpga/dfl/dfl-afu.h
similarity index 100%
rename from drivers/fpga/dfl-afu.h
rename to drivers/fpga/dfl/dfl-afu.h
diff --git a/drivers/fpga/dfl-fme-br.c b/drivers/fpga/dfl/dfl-fme-br.c
similarity index 100%
rename from drivers/fpga/dfl-fme-br.c
rename to drivers/fpga/dfl/dfl-fme-br.c
diff --git a/drivers/fpga/dfl-fme-error.c b/drivers/fpga/dfl/dfl-fme-error.c
similarity index 100%
rename from drivers/fpga/dfl-fme-error.c
rename to drivers/fpga/dfl/dfl-fme-error.c
diff --git a/drivers/fpga/dfl-fme-main.c b/drivers/fpga/dfl/dfl-fme-main.c
similarity index 100%
rename from drivers/fpga/dfl-fme-main.c
rename to drivers/fpga/dfl/dfl-fme-main.c
diff --git a/drivers/fpga/dfl-fme-mgr.c b/drivers/fpga/dfl/dfl-fme-mgr.c
similarity index 100%
rename from drivers/fpga/dfl-fme-mgr.c
rename to drivers/fpga/dfl/dfl-fme-mgr.c
diff --git a/drivers/fpga/dfl-fme-perf.c b/drivers/fpga/dfl/dfl-fme-perf.c
similarity index 100%
rename from drivers/fpga/dfl-fme-perf.c
rename to drivers/fpga/dfl/dfl-fme-perf.c
diff --git a/drivers/fpga/dfl-fme-pr.c b/drivers/fpga/dfl/dfl-fme-pr.c
similarity index 100%
rename from drivers/fpga/dfl-fme-pr.c
rename to drivers/fpga/dfl/dfl-fme-pr.c
diff --git a/drivers/fpga/dfl-fme-pr.h b/drivers/fpga/dfl/dfl-fme-pr.h
similarity index 100%
rename from drivers/fpga/dfl-fme-pr.h
rename to drivers/fpga/dfl/dfl-fme-pr.h
diff --git a/drivers/fpga/dfl-fme-region.c b/drivers/fpga/dfl/dfl-fme-region.c
similarity index 100%
rename from drivers/fpga/dfl-fme-region.c
rename to drivers/fpga/dfl/dfl-fme-region.c
diff --git a/drivers/fpga/dfl-fme.h b/drivers/fpga/dfl/dfl-fme.h
similarity index 100%
rename from drivers/fpga/dfl-fme.h
rename to drivers/fpga/dfl/dfl-fme.h
diff --git a/drivers/fpga/dfl-n3000-nios.c b/drivers/fpga/dfl/dfl-n3000-nios.c
similarity index 100%
rename from drivers/fpga/dfl-n3000-nios.c
rename to drivers/fpga/dfl/dfl-n3000-nios.c
diff --git a/drivers/fpga/dfl-pci.c b/drivers/fpga/dfl/dfl-pci.c
similarity index 100%
rename from drivers/fpga/dfl-pci.c
rename to drivers/fpga/dfl/dfl-pci.c
diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl/dfl.c
similarity index 100%
rename from drivers/fpga/dfl.c
rename to drivers/fpga/dfl/dfl.c
diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl/dfl.h
similarity index 100%
rename from drivers/fpga/dfl.h
rename to drivers/fpga/dfl/dfl.h
-- 
2.26.3