3 files changed, 67 insertions, 0 deletions

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
index 2cde0eb00ee3..00b8c642e672 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
@@ -47,6 +47,7 @@
 #include <linux/interrupt.h>
 #include <linux/pci.h>
 #include <linux/ethtool.h>
+#include <linux/firmware.h>
 
 #include "nfpcore/nfp.h"
 #include "nfpcore/nfp_nsp.h"
@@ -1269,6 +1270,57 @@ static int nfp_net_set_channels(struct net_device *netdev,
 	return nfp_net_set_num_rings(nn, total_rx, total_tx);
 }
 
+static int
+nfp_net_flash_device(struct net_device *netdev, struct ethtool_flash *flash)
+{
+	const struct firmware *fw;
+	struct nfp_app *app;
+	struct nfp_nsp *nsp;
+	struct device *dev;
+	int err;
+
+	if (flash->region != ETHTOOL_FLASH_ALL_REGIONS)
+		return -EOPNOTSUPP;
+
+	app = nfp_app_from_netdev(netdev);
+	if (!app)
+		return -EOPNOTSUPP;
+
+	dev = &app->pdev->dev;
+
+	nsp = nfp_nsp_open(app->cpp);
+	if (IS_ERR(nsp)) {
+		err = PTR_ERR(nsp);
+		dev_err(dev, "Failed to access the NSP: %d\n", err);
+		return err;
+	}
+
+	err = request_firmware_direct(&fw, flash->data, dev);
+	if (err)
+		goto exit_close_nsp;
+
+	dev_info(dev, "Please be patient while writing flash image: %s\n",
+		 flash->data);
+	dev_hold(netdev);
+	rtnl_unlock();
+
+	err = nfp_nsp_write_flash(nsp, fw);
+	if (err < 0) {
+		dev_err(dev, "Flash write failed: %d\n", err);
+		goto exit_rtnl_lock;
+	}
+	dev_info(dev, "Finished writing flash image\n");
+
+exit_rtnl_lock:
+	rtnl_lock();
+	dev_put(netdev);
+	release_firmware(fw);
+
+exit_close_nsp:
+	nfp_nsp_close(nsp);
+	return err;
+}
+
 static const struct ethtool_ops nfp_net_ethtool_ops = {
 	.get_drvinfo		= nfp_net_get_drvinfo,
 	.get_link		= ethtool_op_get_link,
@@ -1279,6 +1331,7 @@ static const struct ethtool_ops nfp_net_ethtool_ops = {
 	.get_sset_count		= nfp_net_get_sset_count,
 	.get_rxnfc		= nfp_net_get_rxnfc,
 	.set_rxnfc		= nfp_net_set_rxnfc,
+	.flash_device		= nfp_net_flash_device,
 	.get_rxfh_indir_size	= nfp_net_get_rxfh_indir_size,
 	.get_rxfh_key_size	= nfp_net_get_rxfh_key_size,
 	.get_rxfh		= nfp_net_get_rxfh,
@@ -1304,6 +1357,7 @@ const struct ethtool_ops nfp_port_ethtool_ops = {
 	.get_strings		= nfp_port_get_strings,
 	.get_ethtool_stats	= nfp_port_get_stats,
 	.get_sset_count		= nfp_port_get_sset_count,
+	.flash_device		= nfp_net_flash_device,
 	.set_dump		= nfp_app_set_dump,
 	.get_dump_flag		= nfp_app_get_dump_flag,
 	.get_dump_data		= nfp_app_get_dump_data,
diff --git a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c
index a6b40091968d..39abac678b71 100644
--- a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c
+++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c
@@ -96,6 +96,7 @@ enum nfp_nsp_cmd {
 	SPCODE_FW_LOAD		= 6, /* Load fw from buffer, len in option */
 	SPCODE_ETH_RESCAN	= 7, /* Rescan ETHs, write ETH_TABLE to buf */
 	SPCODE_ETH_CONTROL	= 8, /* Update media config from buffer */
+	SPCODE_NSP_WRITE_FLASH	= 11, /* Load and flash image from buffer */
 	SPCODE_NSP_SENSORS	= 12, /* Read NSP sensor(s) */
 	SPCODE_NSP_IDENTIFY	= 13, /* Read NSP version */
 };
@@ -514,6 +515,17 @@ int nfp_nsp_load_fw(struct nfp_nsp *state, const struct firmware *fw)
 				   fw->size, NULL, 0);
 }
 
+int nfp_nsp_write_flash(struct nfp_nsp *state, const struct firmware *fw)
+{
+	/* The flash time is specified to take a maximum of 70s so we add an
+	 * additional factor to this spec time.
+	 */
+	u32 timeout_sec = 2.5 * 70;
+
+	return __nfp_nsp_command_buf(state, SPCODE_NSP_WRITE_FLASH, fw->size,
+				     fw->data, fw->size, NULL, 0, timeout_sec);
+}
+
 int nfp_nsp_read_eth_table(struct nfp_nsp *state, void *buf, unsigned int size)
 {
 	return nfp_nsp_command_buf(state, SPCODE_ETH_RESCAN, size, NULL, 0,
diff --git a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.h b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.h
index 650ca1a5bd21..e983c9d7f86c 100644
--- a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.h
+++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.h
@@ -48,6 +48,7 @@ u16 nfp_nsp_get_abi_ver_minor(struct nfp_nsp *state);
 int nfp_nsp_wait(struct nfp_nsp *state);
 int nfp_nsp_device_soft_reset(struct nfp_nsp *state);
 int nfp_nsp_load_fw(struct nfp_nsp *state, const struct firmware *fw);
+int nfp_nsp_write_flash(struct nfp_nsp *state, const struct firmware *fw);
 int nfp_nsp_mac_reinit(struct nfp_nsp *state);
 
 static inline bool nfp_nsp_has_mac_reinit(struct nfp_nsp *state)