nfp: add NSP routine to get static information

Retrieve identifying information from the NSP.  For now it only
contains versions of firmware subcomponents.
Signed-off-by: David Brunecz <david.brunecz@netronome.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/netronome/nfp/Makefile

@@ -9,6 +9,7 @@ nfp-objs := \
 	    nfpcore/nfp_mutex.o \
 	    nfpcore/nfp_nffw.o \
 	    nfpcore/nfp_nsp.o \
+	    nfpcore/nfp_nsp_cmds.o \
 	    nfpcore/nfp_nsp_eth.o \
 	    nfpcore/nfp_resource.o \
 	    nfpcore/nfp_rtsym.o \

drivers/net/ethernet/netronome/nfp/nfp_main.c

@@ -253,6 +253,7 @@ nfp_fw_load(struct pci_dev *pdev, struct nfp_pf *pf, struct nfp_nsp *nsp)
 
 static int nfp_nsp_init(struct pci_dev *pdev, struct nfp_pf *pf)
 {
+	struct nfp_nsp_identify *nspi;
 	struct nfp_nsp *nsp;
 	int err;
 
@@ -269,6 +270,12 @@ static int nfp_nsp_init(struct pci_dev *pdev, struct nfp_pf *pf)
 
 	pf->eth_tbl = __nfp_eth_read_ports(pf->cpp, nsp);
 
+	nspi = __nfp_nsp_identify(nsp);
+	if (nspi) {
+		dev_info(&pdev->dev, "BSP: %s\n", nspi->version);
+		kfree(nspi);
+	}
+
 	err = nfp_fw_load(pdev, pf, nsp);
 	if (err < 0) {
 		kfree(pf->eth_tbl);

drivers/net/ethernet/netronome/nfp/nfpcore/nfp.h

@@ -63,6 +63,7 @@ void nfp_nsp_config_clear_state(struct nfp_nsp *state);
 int nfp_nsp_read_eth_table(struct nfp_nsp *state, void *buf, unsigned int size);
 int nfp_nsp_write_eth_table(struct nfp_nsp *state,
 			    const void *buf, unsigned int size);
+int nfp_nsp_read_identify(struct nfp_nsp *state, void *buf, unsigned int size);
 
 /* Implemented in nfp_resource.c */
 

drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c

@@ -93,6 +93,7 @@ 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_IDENTIFY	= 13, /* Read NSP version */
 
 	__MAX_SPCODE,
 };
@@ -493,3 +494,9 @@ int nfp_nsp_write_eth_table(struct nfp_nsp *state,
 	return nfp_nsp_command_buf(state, SPCODE_ETH_CONTROL, size, buf, size,
 				   NULL, 0);
 }
+
+int nfp_nsp_read_identify(struct nfp_nsp *state, void *buf, unsigned int size)
+{
+	return nfp_nsp_command_buf(state, SPCODE_NSP_IDENTIFY, size, NULL, 0,
+				   buf, size);
+}

drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.h

@@ -147,4 +147,28 @@ int __nfp_eth_set_aneg(struct nfp_nsp *nsp, enum nfp_eth_aneg mode);
 int __nfp_eth_set_speed(struct nfp_nsp *nsp, unsigned int speed);
 int __nfp_eth_set_split(struct nfp_nsp *nsp, unsigned int lanes);
 
+/**
+ * struct nfp_nsp_identify - NSP static information
+ * @version:      opaque version string
+ * @flags:        version flags
+ * @br_primary:   branch id of primary bootloader
+ * @br_secondary: branch id of secondary bootloader
+ * @br_nsp:       branch id of NSP
+ * @primary:      version of primarary bootloader
+ * @secondary:    version id of secondary bootloader
+ * @nsp:          version id of NSP
+ */
+struct nfp_nsp_identify {
+	char version[40];
+	u8 flags;
+	u8 br_primary;
+	u8 br_secondary;
+	u8 br_nsp;
+	u16 primary;
+	u16 secondary;
+	u16 nsp;
+};
+
+struct nfp_nsp_identify *__nfp_nsp_identify(struct nfp_nsp *nsp);
+
 #endif

drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp_cmds.c

+/*
+ * Copyright (C) 2017 Netronome Systems, Inc.
+ *
+ * This software is dual licensed under the GNU General License Version 2,
+ * June 1991 as shown in the file COPYING in the top-level directory of this
+ * source tree or the BSD 2-Clause License provided below.  You have the
+ * option to license this software under the complete terms of either license.
+ *
+ * The BSD 2-Clause License:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      1. Redistributions of source code must retain the above
+ *         copyright notice, this list of conditions and the following
+ *         disclaimer.
+ *
+ *      2. Redistributions in binary form must reproduce the above
+ *         copyright notice, this list of conditions and the following
+ *         disclaimer in the documentation and/or other materials
+ *         provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+
+#include "nfp.h"
+#include "nfp_nsp.h"
+
+struct nsp_identify {
+	u8 version[40];
+	u8 flags;
+	u8 br_primary;
+	u8 br_secondary;
+	u8 br_nsp;
+	__le16 primary;
+	__le16 secondary;
+	__le16 nsp;
+	__le16 reserved;
+};
+
+struct nfp_nsp_identify *__nfp_nsp_identify(struct nfp_nsp *nsp)
+{
+	struct nfp_nsp_identify *nspi = NULL;
+	struct nsp_identify *ni;
+	int ret;
+
+	if (nfp_nsp_get_abi_ver_minor(nsp) < 15)
+		return NULL;
+
+	ni = kzalloc(sizeof(*ni), GFP_KERNEL);
+	if (!ni)
+		return NULL;
+
+	ret = nfp_nsp_read_identify(nsp, ni, sizeof(*ni));
+	if (ret < 0) {
+		nfp_err(nfp_nsp_cpp(nsp), "reading bsp version failed %d\n",
+			ret);
+		goto exit_free;
+	}
+
+	nspi = kzalloc(sizeof(*nspi), GFP_KERNEL);
+	if (!nspi)
+		goto exit_free;
+
+	memcpy(nspi->version, ni->version, sizeof(nspi->version));
+	nspi->version[sizeof(nspi->version) - 1] = '\0';
+	nspi->flags = ni->flags;
+	nspi->br_primary = ni->br_primary;
+	nspi->br_secondary = ni->br_secondary;
+	nspi->br_nsp = ni->br_nsp;
+	nspi->primary = le16_to_cpu(ni->primary);
+	nspi->secondary = le16_to_cpu(ni->secondary);
+	nspi->nsp = le16_to_cpu(ni->nsp);
+
+exit_free:
+	kfree(ni);
+	return nspi;
+}