Detect if the spidev driver is installed when the ENABLE_MAX2771 flag is set. Detect if the DMA proxy driver is installed when the ENABLE_DMA_PROXY flag is set. Check if ENABLE_FPGA is set when either ENABLE_MAX2771 or ENABLE_DMA_PROXY is set.

CMakeLists.txt

@@ -44,7 +44,9 @@ option(ENABLE_AD936X_SDR "Enable the use of AD936X front-ends using libiio, requ
 
 option(ENABLE_AD9361 "Enable the use of AD9361 direct to FPGA hardware, requires libiio" OFF)
 
-option(ENABLE_FPGA_MAX2771_EVKIT "Enable the use of MAX2771 EVKIT direct to FPGA hardware" OFF)
+option(ENABLE_MAX2771 "Enable the use of MAX2771 direct to FPGA hardware, requires the spidev driver" OFF)
+
+option(ENABLE_DMA_PROXY "Enable the use of the DMA direct to FPGA hardware, requires the DMA Proxy driver" OFF)
 
 option(ENABLE_RAW_UDP "Enable the use of high-optimized custom UDP packet sample source, requires libpcap" OFF)
 
@@ -3348,12 +3350,107 @@ if(ENABLE_AD9361 OR ENABLE_FMCOMMS2)
     endif()
 endif()
 
-##############################################
+
-# Check FPGA-related signal sources
+
-##############################################
+#####################################################################
-if((ENABLE_AD9361 OR ENABLE_FPGA_MAX2771_EVKIT) AND NOT ENABLE_FPGA)
+# Check signal sources related to FPGA only.
-    message(FATAL_ERROR "ENABLE_AD9361 and ENABLE_FPGA_MAX2771_EVKIT can only be set when ENABLE_FPGA is also set.")
+#####################################################################
+if(ENABLE_MAX2771 AND NOT ENABLE_FPGA)
+	message(STATUS "The SPIdev driver is enabled, but the FPGA is not enabled. The FPGA is required when using the SPIdev driver.")
+	if(ENABLE_PACKAGING)
+		set(ENABLE_MAX2771 OFF)
+	else()
+		message(FATAL_ERROR "ENABLE_MAX2771 can only be set when ENABLE_FPGA is also set.")
+    endif()
 endif()
+if(ENABLE_DMA_PROXY AND NOT ENABLE_FPGA)
+	message(STATUS "The DMA Proxy driver is enabled, but the FPGA is not enabled. The FPGA is required when using the DMA Proxy driver.")
+	if(ENABLE_PACKAGING)
+		set(ENABLE_DMA_PROXY OFF)
+	else()
+		message(FATAL_ERROR "ENABLE_DMA_PROXY can only be set when ENABLE_FPGA is also set.")
+    endif()
+endif()
+
+
+
+#####################################################################
+# spidev driver - OPTIONAL
+# Linux kernel driver that provides user-space access to Serial
+# Peripheral Interface)
+#####################################################################
+if(ENABLE_MAX2771)
+	if(DEFINED ENV{SDKTARGETSYSROOT})
+	    set(TARGET_ROOTFS_PATH $ENV{SDKTARGETSYSROOT})
+	else()
+	    set(TARGET_ROOTFS_PATH "")
+	endif()
+	find_program(STRINGS_EXECUTABLE strings)
+	if (NOT STRINGS_EXECUTABLE)
+        message(STATUS "The 'strings' command could not be found. See https://www.gnu.org/software/binutils/")
+        message(STATUS " You can try to install it by typing:")
+        if(${CMAKE_SYSTEM_NAME} MATCHES "Linux|kFreeBSD|GNU")
+            if(${LINUX_DISTRIBUTION} MATCHES "Fedora" OR ${LINUX_DISTRIBUTION} MATCHES "Red Hat")
+                message(STATUS " sudo yum install binutils")
+            elseif(${LINUX_DISTRIBUTION} MATCHES "openSUSE")
+                message(STATUS " sudo zypper install binutils")
+            else()
+                message(STATUS " sudo apt-get install binutils")
+            endif()
+        endif()
+        message(FATAL_ERROR "Binutils are required to build GNSS-SDR for SoC FPGA devices using the MAX2771 option.")    
+	endif()
+	set(DTB_FILE "${TARGET_ROOTFS_PATH}/boot/devicetree/system-top.dtb")
+	if (EXISTS "${DTB_FILE}")
+	    message(STATUS "Found DTB file: ${DTB_FILE}")
+	    # Run the strings command and grep for "spidev"
+	    execute_process(
+	        COMMAND ${STRINGS_EXECUTABLE} ${DTB_FILE}
+	        COMMAND grep "spidev"
+	        OUTPUT_VARIABLE GREP_OUTPUT
+	        RESULT_VARIABLE GREP_RESULT
+	        OUTPUT_STRIP_TRAILING_WHITESPACE
+	    )
+	    if (GREP_RESULT EQUAL 0)
+	        message(STATUS "Found spidev-compatible peripheral in ${DTB_FILE}.")
+	    else()
+			message(STATUS "SPIdev driver not found, its installation is required.")
+			if(ENABLE_PACKAGING)
+				set(ENABLE_MAX2771 OFF)
+			else()
+				message(FATAL_ERROR "SPIdev driver is required for building gnss-sdr with -DENABLE_MAX2271=ON.")
+			endif()
+	    endif()
+	else()
+	    message(FATAL_ERROR "The device tree (DTB) file ${DTB_FILE} cannot be found.")
+	endif()
+endif()
+
+
+
+#####################################################################
+# DMA Proxy driver - OPTIONAL
+# Simplified and efficient interface for user-space applications
+# to leverage DMA capabilities  for Xilinx FPGA and SoC systems
+#####################################################################
+if(ENABLE_DMA_PROXY)
+	if(DEFINED ENV{SDKTARGETSYSROOT})
+	    set(TARGET_ROOTFS_PATH $ENV{SDKTARGETSYSROOT})
+	else()
+	    set(TARGET_ROOTFS_PATH "")
+	endif()
+	set(DMA_PROXY_FILE "${TARGET_ROOTFS_PATH}/lib/modules/5.10.0-xilinx-v2021.2/extra/dma-proxy.ko")
+	if (EXISTS "${DMA_PROXY_FILE}")
+	    message(STATUS "Found dma-proxy.ko file: ${DMA_PROXY_FILE}")
+	else()
+		if(ENABLE_PACKAGING)
+			set(ENABLE_DMA_PROXY OFF)
+		else()
+			message(FATAL_ERROR "DMA Proxy driver is required for building gnss-sdr with -DENABLE_DMA_PROXY=ON.")
+		endif()
+	endif()
+endif()
+
 
 
 ##############################################
@@ -3560,7 +3657,8 @@ add_feature_info(ENABLE_LIMESDR ENABLE_LIMESDR "Enables Limesdr_Signal_Source. R
 add_feature_info(ENABLE_FMCOMMS2 ENABLE_FMCOMMS2 "Enables Fmcomms2_Signal_Source for FMCOMMS2/3/4 devices. Requires gr-iio and libad9361-dev.")
 add_feature_info(ENABLE_PLUTOSDR ENABLE_PLUTOSDR "Enables Plutosdr_Signal_Source for using ADALM-PLUTO boards. Requires gr-iio.")
 add_feature_info(ENABLE_AD9361 ENABLE_AD9361 "Enables Ad9361_Fpga_Signal_Source for devices with the AD9361 chipset. Requires libiio and libad9361-dev.")
-add_feature_info(ENABLE_FPGA_MAX2771_EVKIT ENABLE_FPGA_MAX2771_EVKIT "Enables MAX2771_evkit_fpga_signal_source for devices with the MAX2771 chipset.")
+add_feature_info(ENABLE_MAX2771 ENABLE_MAX2771 "Enables FPGA_MAX2771_EVKIT_Signal_Source for devices with the MAX2771 chipset. Requires the spidev driver")
+add_feature_info(ENABLE_DMA_PROXY ENABLE_DMA_PROXY "Enables DMA Signal_Source. Requires the DMA Proxy driver")
 add_feature_info(ENABLE_AD936X_SDR ENABLE_AD936X_SDR "Enables Ad936x_Iio_Signal_Source to access AD936X front-ends using libiio. Requires libiio and libad9361-dev.")
 add_feature_info(ENABLE_RAW_UDP ENABLE_RAW_UDP "Enables Custom_UDP_Signal_Source for custom UDP packet sample source. Requires libpcap.")
 add_feature_info(ENABLE_FLEXIBAND ENABLE_FLEXIBAND "Enables Flexiband_Signal_Source for using Teleorbit's Flexiband RF front-end. Requires gr-teleorbit.")

src/algorithms/signal_source/adapters/CMakeLists.txt

@@ -41,7 +41,7 @@ if(ENABLE_AD9361)
     list(APPEND OPT_DRIVER_HEADERS ad9361_fpga_signal_source.h)
 endif()
 
-if(ENABLE_FPGA_MAX2771_EVKIT)
+if(ENABLE_MAX2771)
     ###############################################
     # MAX2771 EVKIT DIRECT TO FPGA Hardware
     ###############################################
@@ -49,7 +49,7 @@ if(ENABLE_FPGA_MAX2771_EVKIT)
     list(APPEND OPT_DRIVER_HEADERS fpga_max2771_evkit_signal_source.h)
 endif()
 
-if(ENABLE_FPGA)
+if(ENABLE_DMA_PROXY)
     ###############################################
     # FPGA DMA source
     ###############################################

src/algorithms/signal_source/libs/CMakeLists.txt

@@ -12,7 +12,7 @@ if(ENABLE_FMCOMMS2 OR ENABLE_AD9361)
     set(OPT_SIGNAL_SOURCE_LIB_HEADERS ${OPT_SIGNAL_SOURCE_LIB_SOURCES} ad9361_manager.h)
 endif()
 
-if(ENABLE_FPGA_MAX2771_EVKIT)
+if(ENABLE_MAX2771)
     set(OPT_SIGNAL_SOURCE_LIB_SOURCES ${OPT_SIGNAL_SOURCE_LIB_SOURCES} fpga_spidev.cc)
     set(OPT_SIGNAL_SOURCE_LIB_HEADERS ${OPT_SIGNAL_SOURCE_LIB_SOURCES} fpga_spidev.h)
 endif()
@@ -22,11 +22,14 @@ if(ENABLE_FPGA)
     set(OPT_SIGNAL_SOURCE_LIB_HEADERS ${OPT_SIGNAL_SOURCE_LIB_HEADERS} fpga_switch.h)
     set(OPT_SIGNAL_SOURCE_LIB_SOURCES ${OPT_SIGNAL_SOURCE_LIB_SOURCES} fpga_dynamic_bit_selection.cc)
     set(OPT_SIGNAL_SOURCE_LIB_HEADERS ${OPT_SIGNAL_SOURCE_LIB_HEADERS} fpga_dynamic_bit_selection.h)
+endif()
+
+if(ENABLE_DMA_PROXY)
     set(OPT_SIGNAL_SOURCE_LIB_SOURCES ${OPT_SIGNAL_SOURCE_LIB_SOURCES} fpga_dma-proxy.cc)
     set(OPT_SIGNAL_SOURCE_LIB_HEADERS ${OPT_SIGNAL_SOURCE_LIB_HEADERS} fpga_dma-proxy.h)
 endif()
 
-if(ENABLE_AD9361 OR ENABLE_FPGA_MAX2771_EVKIT)
+if(ENABLE_AD9361 OR ENABLE_MAX2771)
     set(OPT_SIGNAL_SOURCE_LIB_SOURCES ${OPT_SIGNAL_SOURCE_LIB_SOURCES} fpga_buffer_monitor.cc)
     set(OPT_SIGNAL_SOURCE_LIB_HEADERS ${OPT_SIGNAL_SOURCE_LIB_HEADERS} fpga_buffer_monitor.h)
 endif()

src/core/receiver/CMakeLists.txt

@@ -98,8 +98,12 @@ if(ENABLE_AD9361)
     target_compile_definitions(core_receiver PRIVATE -DAD9361_DRIVER=1)
 endif()
 
-if(ENABLE_FPGA_MAX2771_EVKIT)
+if(ENABLE_MAX2771)
-    target_compile_definitions(core_receiver PRIVATE -DFPGA_MAX2771_EVKIT_DRIVER=1)
+    target_compile_definitions(core_receiver PRIVATE -DMAX2771_DRIVER=1)
+endif()
+
+if(ENABLE_DMA_PROXY)
+    target_compile_definitions(core_receiver PRIVATE -DDMA_PROXY_DRIVER=1)
 endif()
 
 if(ENABLE_OSMOSDR)

src/core/receiver/gnss_block_factory.cc

@@ -128,7 +128,6 @@
 #endif
 
 #if ENABLE_FPGA
-#include "fpga_dma_signal_source.h"
 #include "galileo_e1_dll_pll_veml_tracking_fpga.h"
 #include "galileo_e1_pcps_ambiguous_acquisition_fpga.h"
 #include "galileo_e5a_dll_pll_tracking_fpga.h"
@@ -171,10 +170,14 @@
 #include "ad9361_fpga_signal_source.h"
 #endif
 
-#if FPGA_MAX2771_EVKIT_DRIVER
+#if MAX2771_DRIVER
 #include "fpga_max2771_evkit_signal_source.h"
 #endif
 
+#if DMA_PROXY_DRIVER
+#include "fpga_dma_signal_source.h"
+#endif
+
 #if LIMESDR_DRIVER
 #include "limesdr_signal_source.h"
 #endif
@@ -825,7 +828,7 @@ std::unique_ptr<GNSSBlockInterface> GNSSBlockFactory::GetBlock(
                 }
 #endif
 
-#if ENABLE_FPGA and FPGA_MAX2771_EVKIT_DRIVER
+#if ENABLE_FPGA and MAX2771_DRIVER
             else if (implementation == "FPGA_MAX2771_EVKIT_Signal_Source")
                 {
                     std::unique_ptr<GNSSBlockInterface> block_ = std::make_unique<FPGAMAX2771EVKITSignalSource>(configuration, role, in_streams,
@@ -834,7 +837,7 @@ std::unique_ptr<GNSSBlockInterface> GNSSBlockFactory::GetBlock(
                 }
 #endif
 
-#if ENABLE_FPGA
+#if ENABLE_FPGA and DMA_PROXY_DRIVER
             else if (implementation == "FPGA_DMA_Signal_Source")
                 {
                     std::unique_ptr<GNSSBlockInterface> block_ = std::make_unique<FPGADMASignalSource>(configuration, role, in_streams,