nfp: check if application firmware is indifferent to port speed

A new tlv type is introduced to indicate if application firmware is
indifferent to port speed, and inform management firmware of the
result.

And the result is always true for flower application firmware since
it's indifferent to port speed from the start and will never change.
Signed-off-by: NYinjun Zhang <yinjun.zhang@corigine.com>
Reviewed-by: NLouis Peens <louis.peens@corigine.com>
Signed-off-by: NSimon Horman <simon.horman@corigine.com>
Signed-off-by: NPaolo Abeni <pabeni@redhat.com>

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

@@ -65,6 +65,7 @@ struct nfp_dumpspec {
  * @num_vfs:		Number of SR-IOV VFs enabled
  * @fw_loaded:		Is the firmware loaded?
  * @unload_fw_on_remove:Do we need to unload firmware on driver removal?
+ * @sp_indiff:		Is the firmware indifferent to physical port speed?
  * @ctrl_vnic:		Pointer to the control vNIC if available
  * @mip:		MIP handle
  * @rtbl:		RTsym table
@@ -114,6 +115,7 @@ struct nfp_pf {
 
 	bool fw_loaded;
 	bool unload_fw_on_remove;
+	bool sp_indiff;
 
 	struct nfp_net *ctrl_vnic;
 

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

@@ -148,6 +148,14 @@ int nfp_net_tlv_caps_parse(struct device *dev, u8 __iomem *ctrl_mem,
 							  true))
 				return -EINVAL;
 			break;
+		case NFP_NET_CFG_TLV_TYPE_SP_INDIFF:
+			if (length) {
+				dev_err(dev, "Unexpected len of SP_INDIFF TLV:%u\n", length);
+				return -EINVAL;
+			}
+
+			caps->sp_indiff = true;
+			break;
 		default:
 			if (!FIELD_GET(NFP_NET_CFG_TLV_HEADER_REQUIRED, hdr))
 				break;

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

@@ -492,6 +492,10 @@
  * %NFP_NET_CFG_TLV_TYPE_CRYPTO_OPS_RX_SCAN:
  * Same as %NFP_NET_CFG_TLV_TYPE_CRYPTO_OPS, but crypto TLS does stream scan
  * RX sync, rather than kernel-assisted sync.
+ *
+ * %NFP_NET_CFG_TLV_TYPE_SP_INDIFF:
+ * Empty, indicate the firmware is indifferent to port speed. Then no need to
+ * reload driver and firmware when port speed is changed.
  */
 #define NFP_NET_CFG_TLV_TYPE_UNKNOWN		0
 #define NFP_NET_CFG_TLV_TYPE_RESERVED		1
@@ -505,6 +509,7 @@
 #define NFP_NET_CFG_TLV_TYPE_CRYPTO_OPS		11 /* see crypto/fw.h */
 #define NFP_NET_CFG_TLV_TYPE_VNIC_STATS		12
 #define NFP_NET_CFG_TLV_TYPE_CRYPTO_OPS_RX_SCAN	13
+#define NFP_NET_CFG_TLV_TYPE_SP_INDIFF		14
 
 struct device;
 
@@ -519,6 +524,7 @@ struct device;
  * @vnic_stats_off:	offset of vNIC stats area
  * @vnic_stats_cnt:	number of vNIC stats
  * @tls_resync_ss:	TLS resync will be performed via stream scan
+ * @sp_indiff:		Firmware is indifferent to port speed
  */
 struct nfp_net_tlv_caps {
 	u32 me_freq_mhz;
@@ -531,6 +537,7 @@ struct nfp_net_tlv_caps {
 	unsigned int vnic_stats_off;
 	unsigned int vnic_stats_cnt;
 	unsigned int tls_resync_ss:1;
+	unsigned int sp_indiff:1;
 };
 
 int nfp_net_tlv_caps_parse(struct device *dev, u8 __iomem *ctrl_mem,

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

@@ -206,6 +206,7 @@ nfp_net_pf_alloc_vnics(struct nfp_pf *pf, void __iomem *ctrl_bar,
 			nn->port->link_cb = nfp_net_refresh_port_table;
 
 		ctrl_bar += NFP_PF_CSR_SLICE_SIZE;
+		pf->sp_indiff |= nn->tlv_caps.sp_indiff;
 
 		/* Kill the vNIC if app init marked it as invalid */
 		if (nn->port && nn->port->type == NFP_PORT_INVALID)
@@ -307,6 +308,37 @@ static int nfp_net_pf_init_vnics(struct nfp_pf *pf)
 	return err;
 }
 
+static int nfp_net_pf_cfg_nsp(struct nfp_pf *pf, bool sp_indiff)
+{
+	struct nfp_nsp *nsp;
+	char hwinfo[32];
+	int err;
+
+	nsp = nfp_nsp_open(pf->cpp);
+	if (IS_ERR(nsp)) {
+		err = PTR_ERR(nsp);
+		return err;
+	}
+
+	snprintf(hwinfo, sizeof(hwinfo), "sp_indiff=%d", sp_indiff);
+	err = nfp_nsp_hwinfo_set(nsp, hwinfo, sizeof(hwinfo));
+	if (err)
+		nfp_warn(pf->cpp, "HWinfo(sp_indiff=%d) set failed: %d\n", sp_indiff, err);
+
+	nfp_nsp_close(nsp);
+	return err;
+}
+
+static int nfp_net_pf_init_nsp(struct nfp_pf *pf)
+{
+	return nfp_net_pf_cfg_nsp(pf, pf->sp_indiff);
+}
+
+static void nfp_net_pf_clean_nsp(struct nfp_pf *pf)
+{
+	(void)nfp_net_pf_cfg_nsp(pf, false);
+}
+
 static int
 nfp_net_pf_app_init(struct nfp_pf *pf, u8 __iomem *qc_bar, unsigned int stride)
 {
@@ -318,6 +350,8 @@ nfp_net_pf_app_init(struct nfp_pf *pf, u8 __iomem *qc_bar, unsigned int stride)
 	if (IS_ERR(pf->app))
 		return PTR_ERR(pf->app);
 
+	pf->sp_indiff |= pf->app->type->id == NFP_APP_FLOWER_NIC;
+
 	devl_lock(devlink);
 	err = nfp_app_init(pf->app);
 	devl_unlock(devlink);
@@ -780,10 +814,14 @@ int nfp_net_pci_probe(struct nfp_pf *pf)
 	if (err)
 		goto err_clean_ddir;
 
-	err = nfp_net_pf_alloc_irqs(pf);
+	err = nfp_net_pf_init_nsp(pf);
 	if (err)
 		goto err_free_vnics;
 
+	err = nfp_net_pf_alloc_irqs(pf);
+	if (err)
+		goto err_clean_nsp;
+
 	err = nfp_net_pf_app_start(pf);
 	if (err)
 		goto err_free_irqs;
@@ -801,6 +839,8 @@ int nfp_net_pci_probe(struct nfp_pf *pf)
 	nfp_net_pf_app_stop(pf);
 err_free_irqs:
 	nfp_net_pf_free_irqs(pf);
+err_clean_nsp:
+	nfp_net_pf_clean_nsp(pf);
 err_free_vnics:
 	nfp_net_pf_free_vnics(pf);
 err_clean_ddir:
@@ -831,6 +871,7 @@ void nfp_net_pci_remove(struct nfp_pf *pf)
 		nfp_net_pf_free_vnic(pf, nn);
 	}
 
+	nfp_net_pf_clean_nsp(pf);
 	nfp_net_pf_app_stop(pf);
 	/* stop app first, to avoid double free of ctrl vNIC's ddir */
 	nfp_net_debugfs_dir_clean(&pf->ddir);