netdev - [PATCH net] nfp: only clean `sp_indiff` when application firmware is unloaded

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Message-Id: <20221020081411.80186-1-simon.horman@corigine.com>
Date:   Thu, 20 Oct 2022 09:14:11 +0100
From:   Simon Horman <simon.horman@...igine.com>
To:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     netdev@...r.kernel.org, oss-drivers@...igine.com,
        Yinjun Zhang <yinjun.zhang@...igine.com>,
        Simon Horman <simon.horman@...igine.com>
Subject: [PATCH net] nfp: only clean `sp_indiff` when application firmware is unloaded

From: Yinjun Zhang <yinjun.zhang@...igine.com>

Currently `sp_indiff` is cleaned when driver is removed. This will
cause problem in multi-PF/multi-host case, considering one PF is
removed while another is still in use.

Since `sp_indiff` is the application firmware property, it should
only be cleaned when the firmware is unloaded. Now let management
firmware to clean it when necessary, driver only set it.

Fixes: b1e4f11e426d ("nfp: refine the ABI of getting `sp_indiff` info")
Signed-off-by: Yinjun Zhang <yinjun.zhang@...igine.com>
Signed-off-by: Simon Horman <simon.horman@...igine.com>
---
 drivers/net/ethernet/netronome/nfp/nfp_main.c | 38 ++++++++-----------
 1 file changed, 15 insertions(+), 23 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_main.c b/drivers/net/ethernet/netronome/nfp/nfp_main.c
index e66e548919d4..71301dbd8fb5 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_main.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_main.c
@@ -716,16 +716,26 @@ static u64 nfp_net_pf_get_app_cap(struct nfp_pf *pf)
 	return val;
 }
 
-static int nfp_pf_cfg_hwinfo(struct nfp_pf *pf, bool sp_indiff)
+static void nfp_pf_cfg_hwinfo(struct nfp_pf *pf)
 {
 	struct nfp_nsp *nsp;
 	char hwinfo[32];
+	bool sp_indiff;
 	int err;
 
 	nsp = nfp_nsp_open(pf->cpp);
 	if (IS_ERR(nsp))
-		return PTR_ERR(nsp);
+		return;
+
+	if (!nfp_nsp_has_hwinfo_set(nsp))
+		goto end;
 
+	sp_indiff = (nfp_net_pf_get_app_id(pf) == NFP_APP_FLOWER_NIC) ||
+		    (nfp_net_pf_get_app_cap(pf) & NFP_NET_APP_CAP_SP_INDIFF);
+
+	/* No need to clean `sp_indiff` in driver, management firmware
+	 * will do it when application firmware is unloaded.
+	 */
 	snprintf(hwinfo, sizeof(hwinfo), "sp_indiff=%d", sp_indiff);
 	err = nfp_nsp_hwinfo_set(nsp, hwinfo, sizeof(hwinfo));
 	/* Not a fatal error, no need to return error to stop driver from loading */
@@ -739,21 +749,8 @@ static int nfp_pf_cfg_hwinfo(struct nfp_pf *pf, bool sp_indiff)
 		pf->eth_tbl = __nfp_eth_read_ports(pf->cpp, nsp);
 	}
 
+end:
 	nfp_nsp_close(nsp);
-	return 0;
-}
-
-static int nfp_pf_nsp_cfg(struct nfp_pf *pf)
-{
-	bool sp_indiff = (nfp_net_pf_get_app_id(pf) == NFP_APP_FLOWER_NIC) ||
-			 (nfp_net_pf_get_app_cap(pf) & NFP_NET_APP_CAP_SP_INDIFF);
-
-	return nfp_pf_cfg_hwinfo(pf, sp_indiff);
-}
-
-static void nfp_pf_nsp_clean(struct nfp_pf *pf)
-{
-	nfp_pf_cfg_hwinfo(pf, false);
 }
 
 static int nfp_pci_probe(struct pci_dev *pdev,
@@ -856,13 +853,11 @@ static int nfp_pci_probe(struct pci_dev *pdev,
 		goto err_fw_unload;
 	}
 
-	err = nfp_pf_nsp_cfg(pf);
-	if (err)
-		goto err_fw_unload;
+	nfp_pf_cfg_hwinfo(pf);
 
 	err = nfp_net_pci_probe(pf);
 	if (err)
-		goto err_nsp_clean;
+		goto err_fw_unload;
 
 	err = nfp_hwmon_register(pf);
 	if (err) {
@@ -874,8 +869,6 @@ static int nfp_pci_probe(struct pci_dev *pdev,
 
 err_net_remove:
 	nfp_net_pci_remove(pf);
-err_nsp_clean:
-	nfp_pf_nsp_clean(pf);
 err_fw_unload:
 	kfree(pf->rtbl);
 	nfp_mip_close(pf->mip);
@@ -915,7 +908,6 @@ static void __nfp_pci_shutdown(struct pci_dev *pdev, bool unload_fw)
 
 	nfp_net_pci_remove(pf);
 
-	nfp_pf_nsp_clean(pf);
 	vfree(pf->dumpspec);
 	kfree(pf->rtbl);
 	nfp_mip_close(pf->mip);
-- 
2.30.2