not really functional yet, but trying to loop over flx devices

network_device/Makefile

 #
-# Makefile to make flxnet kernel modules flxnet_dev and flxnet_target
+# Makefile.host to make flxnet kernel modules flxnet_dev and flxnet_pcie
 # 29-10-2024
-# 
-# Written for the FLX182 to build the correct target modules
+# based on generated makefile from https://gitlab.cern.ch/atlas-tdaq-felix/felix-tdaq-drivers/-/blob/main/rpm/SOURCES/pkgs/generate_dkms_makefile.py?ref_type=heads
+#
+# Execute command on host server  
+# cp Makefile.host Makefile
 #
 
-obj-m := flxnet_dev.o flxnet_target.o
+KERNEL_VERSION := $(shell uname -r)
+KERNEL_MODLIB  := /lib/modules/$(KERNEL_VERSION)
+KERNEL_SOURCES := $(shell test -d $(KERNEL_MODLIB)/source && echo $(KERNEL_MODLIB)/source || echo $(KERNEL_MODLIB)/build)
 
-MY_CFLAGS += -g -DDEBUG
-ccflags-y += ${MY_CFLAGS}
+CPPFLAGS      += -I$(PWD)/../flx -I$(PWD)/.. -DBUILD_64_BIT -DCOMPILE_DRIVER -DDRIVER_ERROR -DDRIVER_DEBUG -DRELEASE_NAME=\"${RELEASE_NAME}\" -DCVSTAG=\"$(CVSTAG)\"
+EXTRA_CFLAGS  := -I$(PWD)/../flx -I$(PWD)/.. -DBUILD_64_BIT -DCOMPILE_DRIVER -DDRIVER_ERROR -DDRIVER_DEBUG -DRELEASE_NAME=\"${RELEASE_NAME}\" -DCVSTAG=\"$(CVSTAG)\" -DCMEM_RCC_TAG=\"$(CMEM_RCC_TAG)\" -DIO_RCC_TAG=\"$(IO_RCC_TAG)\" -DFLX_TAG=\"$(FLX_TAG)\" 
 
-SRC := $(shell pwd)
 
-all:
-	$(MAKE) -C $(KERNEL_SRC) M=$(SRC)
+obj-m   := flxnet_dev.o flxnet_pcie.o
+KDIR	:= $(KERNEL_SOURCES)
+PWD		:= $(shell pwd)
 
-modules_install:
-	$(MAKE) -C $(KERNEL_SRC) M=$(SRC) modules_install
+default:
+	$(MAKE) -C $(KDIR) M=$(PWD) modules
 	
 clean:
-	rm -f *.o *~ core .depend .*.cmd *.ko *.mod.c
-	rm -f Module.markers Module.symvers modules.order
-	rm -rf .tmp_versions Modules.symvers
+	$(RM) *.o *~ core .depend .*.cmd *.ko *.mod.c .tmp_versions *.o.d *.mod
\ No newline at end of file

network_device/flxnet/flxnet.h

@@ -46,4 +46,6 @@ struct flxnet_peer {
 
 #define FLX_DEV_MAGIC	0xCECABABAUL
 
+#define MAXCARDS 1 // max number of FLX cards in a server
+
 #endif

network_device/flxnet_dev.c

@@ -72,7 +72,7 @@ struct tx_queue {
 };
 
 
-struct tx_queue tx_queue;
+struct tx_queue tx_queue; //[MAXCARDS]
 
 static LIST_HEAD(peers);
 struct mutex peer_mutex;

network_device/flxnet_pcie.c

@@ -26,9 +26,6 @@
 
 #include "flxnet/flxnet.h"
 
-
-#define MAXCARDS 8 // max number of FLX cards
-
 extern struct flxnet_peer * flxnet_add_peer(void* __iomem base_address,
 	int index, struct module *owner);
 
@@ -143,7 +140,10 @@ static int configure_pcie_device(struct pci_dev *pdev, int index) {
 	pr_info("flxnet_pcie: mapping BAR memory");
 	rv = map_single_bar(fdev, bar_idx);
 	if (rv < 0) {
-		goto err_map;
+		pr_info("flxnet_pcie: disabling PCIe device, no network registred");
+		pci_disable_device(pdev);
+		pci_release_region(pdev, bar_idx);
+		return 0;
 	} else if (rv < MIN_MMAP_SIZE) {
 		pr_err("flxnet_pcie: mapped region is too small (%d bytes < %d)",
 			rv, MIN_MMAP_SIZE);
@@ -176,7 +176,7 @@ err_map:
 	pci_release_region(pdev, bar_idx);
 
 err_enable:
-	pr_err("flxnet_pcie: test pdev 0x%p, err %d", pdev, rv);
+	pr_err("flxnet_pcie: pdev 0x%p, err %d", pdev, rv);
 	kfree(fdev);
 	return rv;