From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Tue, 28 Aug 2018 13:20:34 -0700
Subject: nfp: attempt FW load from flash
Patch-mainline: v4.20-rc1
Git-commit: 2db100002eed110e08023cc99d953646f4d62605
References: bsc#1109837

Flash may contain a default NFP application FW.  This application
can either be put there by the user (with ethtool -f) or shipped
with the card.  If file system FW is not found, attempt to load
this flash stored app FW.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/netronome/nfp/nfp_main.c        |    6 ++++--
 drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c |    6 ++++++
 drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.h |    6 ++++++
 3 files changed, 16 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/netronome/nfp/nfp_main.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_main.c
@@ -441,8 +441,11 @@ nfp_fw_load(struct pci_dev *pdev, struct
 	}
 
 	fw = nfp_net_fw_find(pdev, pf);
-	if (!fw)
+	if (!fw) {
+		if (nfp_nsp_has_stored_fw_load(nsp))
+			nfp_nsp_load_stored_fw(nsp);
 		return 0;
+	}
 
 	dev_info(&pdev->dev, "Soft-reset, loading FW image\n");
 	err = nfp_nsp_device_soft_reset(nsp);
@@ -453,7 +456,6 @@ nfp_fw_load(struct pci_dev *pdev, struct
 	}
 
 	err = nfp_nsp_load_fw(nsp, fw);
-
 	if (err < 0) {
 		dev_err(&pdev->dev, "FW loading failed: %d\n", err);
 		goto exit_release_fw;
--- a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c
+++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c
@@ -100,6 +100,7 @@ enum nfp_nsp_cmd {
 	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 */
+	SPCODE_FW_STORED	= 16, /* If no FW loaded, load flash app FW */
 };
 
 static const struct {
@@ -618,3 +619,8 @@ int nfp_nsp_read_sensors(struct nfp_nsp
 
 	return nfp_nsp_command_buf(state, &sensors);
 }
+
+int nfp_nsp_load_stored_fw(struct nfp_nsp *state)
+{
+	return nfp_nsp_command(state, SPCODE_FW_STORED);
+}
--- a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.h
+++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.h
@@ -50,12 +50,18 @@ int nfp_nsp_device_soft_reset(struct nfp
 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);
+int nfp_nsp_load_stored_fw(struct nfp_nsp *state);
 
 static inline bool nfp_nsp_has_mac_reinit(struct nfp_nsp *state)
 {
 	return nfp_nsp_get_abi_ver_minor(state) > 20;
 }
 
+static inline bool nfp_nsp_has_stored_fw_load(struct nfp_nsp *state)
+{
+	return nfp_nsp_get_abi_ver_minor(state) > 23;
+}
+
 enum nfp_eth_interface {
 	NFP_INTERFACE_NONE	= 0,
 	NFP_INTERFACE_SFP	= 1,