drivers: eth: native: Add native-sim support to posix Ethernet driver

This will enable Ethernet driver to be used when compiling
for native-sim board.

Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>

drivers/ethernet/CMakeLists.txt

@@ -48,8 +48,13 @@ if(CONFIG_ETH_NATIVE_POSIX)
   set_source_files_properties(${native_posix_source_files}
     PROPERTIES COMPILE_DEFINITIONS
     "NO_POSIX_CHEATS;_BSD_SOURCE;_DEFAULT_SOURCE"
-  )
-  zephyr_library_sources(${native_posix_source_files})
+    )
+  if (CONFIG_NATIVE_APPLICATION)
+    zephyr_library_sources(${native_posix_source_files})
+  else()
+    zephyr_library_sources(eth_native_posix.c)
+    target_sources(native_simulator INTERFACE eth_native_posix_adapt.c)
+  endif()
 endif()
 
 add_subdirectory(phy)

drivers/ethernet/Kconfig.native_posix

@@ -5,7 +5,7 @@
 
 menuconfig ETH_NATIVE_POSIX
 	bool "Native Posix Ethernet driver"
-	depends on ARCH_POSIX && EXTERNAL_LIBC
+	depends on ARCH_POSIX
 	help
 	  Enable native posix ethernet driver. Note, this driver is run inside
 	  a process in your host system.

drivers/ethernet/eth_native_posix.c

@@ -153,7 +153,7 @@ static void update_gptp(struct net_if *iface, struct net_pkt *pkt,
 	struct gptp_hdr *hdr;
 	int ret;
 
-	ret = eth_clock_gettime(&timestamp);
+	ret = eth_clock_gettime(&timestamp.second, &timestamp.nanosecond);
 	if (ret < 0) {
 		return;
 	}
@@ -460,7 +460,7 @@ static void eth_iface_init(struct net_if *iface)
 	 * change the documentation etc. and break things.
 	 */
 	if (CONFIG_ETH_NATIVE_POSIX_INTERFACE_COUNT == 1) {
-		ctx->if_name = ETH_NATIVE_POSIX_DRV_NAME;
+		ctx->if_name = CONFIG_ETH_NATIVE_POSIX_DRV_NAME;
 	}
 
 	LOG_DBG("Interface %p using \"%s\"", iface, ctx->if_name);
@@ -468,7 +468,7 @@ static void eth_iface_init(struct net_if *iface)
 	net_if_set_link_addr(iface, ll_addr->addr, ll_addr->len,
 			     NET_LINK_ETHERNET);
 
-	ctx->dev_fd = eth_iface_create(ctx->if_name, false);
+	ctx->dev_fd = eth_iface_create(CONFIG_ETH_NATIVE_POSIX_DEV_NAME, ctx->if_name, false);
 	if (ctx->dev_fd < 0) {
 		LOG_ERR("Cannot create %s (%d)", ctx->if_name, -errno);
 	} else {
@@ -642,7 +642,7 @@ static int ptp_clock_get_native_posix(const struct device *clk,
 {
 	ARG_UNUSED(clk);
 
-	return eth_clock_gettime(tm);
+	return eth_clock_gettime(&tm->second, &tm->nanosecond);
 }
 
 static int ptp_clock_adjust_native_posix(const struct device *clk,

drivers/ethernet/eth_native_posix_adapt.c

@@ -25,39 +25,25 @@
 #include <sys/select.h>
 #include <net/if.h>
 #include <time.h>
-#include <zephyr/arch/posix/posix_trace.h>
+#include <inttypes.h>
+#include <nsi_tracing.h>
 
 #ifdef __linux
+#include <linux/if.h>
 #include <linux/if_tun.h>
 #endif
 
-/* Zephyr include files. Be very careful here and only include minimum
- * things needed.
- */
-#define LOG_MODULE_NAME eth_posix_adapt
-#define LOG_LEVEL CONFIG_ETHERNET_LOG_LEVEL
-
-#include <zephyr/logging/log.h>
-LOG_MODULE_REGISTER(LOG_MODULE_NAME);
-
-#include <zephyr/types.h>
-#include <zephyr/sys_clock.h>
-
-#if defined(CONFIG_NET_GPTP)
-#include <zephyr/net/gptp.h>
-#endif
-
 #include "eth_native_posix_priv.h"
 
 /* Note that we cannot create the TUN/TAP device from the setup script
  * as we need to get a file descriptor to communicate with the interface.
  */
-int eth_iface_create(const char *if_name, bool tun_only)
+int eth_iface_create(const char *dev_name, const char *if_name, bool tun_only)
 {
 	struct ifreq ifr;
 	int fd, ret = -EINVAL;
 
-	fd = open(ETH_NATIVE_POSIX_DEV_NAME, O_RDWR);
+	fd = open(dev_name, O_RDWR);
 	if (fd < 0) {
 		return -errno;
 	}
@@ -98,7 +84,7 @@ static int ssystem(const char *fmt, ...)
 	vsnprintf(cmd, sizeof(cmd), fmt, ap);
 	va_end(ap);
 
-	posix_print_trace("%s\n", cmd);
+	nsi_print_trace("%s\n", cmd);
 
 	ret = system(cmd);
 
@@ -140,8 +126,7 @@ ssize_t eth_write_data(int fd, void *buf, size_t buf_len)
 	return write(fd, buf, buf_len);
 }
 
-#if defined(CONFIG_NET_GPTP)
-int eth_clock_gettime(struct net_ptp_time *time)
+int eth_clock_gettime(uint64_t *second, uint32_t *nanosecond)
 {
 	struct timespec tp;
 	int ret;
@@ -151,17 +136,14 @@ int eth_clock_gettime(struct net_ptp_time *time)
 		return -errno;
 	}
 
-	time->second = tp.tv_sec;
-	time->nanosecond = tp.tv_nsec;
+	*second = (uint64_t)tp.tv_sec;
+	*nanosecond = (uint32_t)tp.tv_nsec;
 
 	return 0;
 }
-#endif /* CONFIG_NET_GPTP */
 
-#if defined(CONFIG_NET_PROMISCUOUS_MODE)
 int eth_promisc_mode(const char *if_name, bool enable)
 {
 	return ssystem("ip link set dev %s promisc %s",
 		       if_name, enable ? "on" : "off");
 }
-#endif /* CONFIG_NET_PROMISCUOUS_MODE */

drivers/ethernet/eth_native_posix_priv.h

@@ -11,26 +11,12 @@
 #ifndef ZEPHYR_DRIVERS_ETHERNET_ETH_NATIVE_POSIX_PRIV_H_
 #define ZEPHYR_DRIVERS_ETHERNET_ETH_NATIVE_POSIX_PRIV_H_
 
-int eth_iface_create(const char *if_name, bool tun_only);
+int eth_iface_create(const char *dev_name, const char *if_name, bool tun_only);
 int eth_iface_remove(int fd);
 int eth_wait_data(int fd);
 ssize_t eth_read_data(int fd, void *buf, size_t buf_len);
 ssize_t eth_write_data(int fd, void *buf, size_t buf_len);
-
-#if defined(CONFIG_NET_GPTP)
-int eth_clock_gettime(struct net_ptp_time *time);
-#endif
-
-#if defined(CONFIG_NET_PROMISCUOUS_MODE)
+int eth_clock_gettime(uint64_t *second, uint32_t *nanosecond);
 int eth_promisc_mode(const char *if_name, bool enable);
-#else
-static inline int eth_promisc_mode(const char *if_name, bool enable)
-{
-	ARG_UNUSED(if_name);
-	ARG_UNUSED(enable);
-
-	return -ENOTSUP;
-}
-#endif
 
 #endif /* ZEPHYR_DRIVERS_ETHERNET_ETH_NATIVE_POSIX_PRIV_H_ */