[PATCH net-next 02/15] nfp: attempt FW load from flash

[Jakub Kicinski]

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.kicin...@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vanderme...@netronome.com>
---
 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(-)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_main.c 
b/drivers/net/ethernet/netronome/nfp/nfp_main.c
index 4a540c5e27fe..61c22c2935d4 100644
--- 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 nfp_pf *pf, 
struct nfp_nsp *nsp)
        }
 
        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 nfp_pf *pf, struct 
nfp_nsp *nsp)
        }
 
        err = nfp_nsp_load_fw(nsp, fw);
-
        if (err < 0) {
                dev_err(&pdev->dev, "FW loading failed: %d\n", err);
                goto exit_release_fw;
diff --git a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c 
b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c
index e1a14f4e5e71..0cdaa1fd6bcf 100644
--- 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 *state, unsigned 
int sensor_mask,
 
        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);
+}
diff --git a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.h 
b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.h
index f23d9e06f097..65f2d4a6de02 100644
--- 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_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);
+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,
-- 
2.17.1