diff mbox series

[net-next,v2,3/5] net: stmmac: dwmac-socfpga: use pcs_init/pcs_exit

Message ID 20240409-rzn1-gmac1-v2-3-79ca45f2fc79@bootlin.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series net: stmmac: Add support for RZN1 GMAC devices | expand

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Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit fail Errors and warnings before: 942 this patch: 19
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 10 of 10 maintainers
netdev/build_clang fail Errors and warnings before: 953 this patch: 19
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn fail Errors and warnings before: 953 this patch: 19
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 139 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Romain Gantois April 9, 2024, 9:21 a.m. UTC
From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>

Use the newly introduced pcs_init() and pcs_exit() operations to
create and destroy the PCS instance at a more appropriate moment during
the driver lifecycle, thereby avoiding publishing a network device to
userspace that has not yet finished its PCS initialisation.

There are other similar issues with this driver which remain
unaddressed, but these are out of scope for this patch.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: Romain Gantois <romain.gantois@bootlin.com>
---
 .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c    | 109 +++++++++++----------
 1 file changed, 55 insertions(+), 54 deletions(-)

Comments

Jakub Kicinski April 10, 2024, 1:34 a.m. UTC | #1
On Tue, 09 Apr 2024 11:21:46 +0200 Romain Gantois wrote:
> +	struct regmap_config pcs_regmap_cfg = {
> +		.reg_bits = 16,
> +		.val_bits = 16,
> +		.reg_shift = regmap_upshift(1),

This appears to displease the compiler:

drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c:389:16: error: call to undeclared function 'regmap_upshift'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  389 |                 .reg_shift = regmap_upshift(1),
      |                              ^
Russell King (Oracle) April 10, 2024, 7:19 p.m. UTC | #2
On Tue, Apr 09, 2024 at 06:34:04PM -0700, Jakub Kicinski wrote:
> On Tue, 09 Apr 2024 11:21:46 +0200 Romain Gantois wrote:
> > +	struct regmap_config pcs_regmap_cfg = {
> > +		.reg_bits = 16,
> > +		.val_bits = 16,
> > +		.reg_shift = regmap_upshift(1),
> 
> This appears to displease the compiler:
> 
> drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c:389:16: error: call to undeclared function 'regmap_upshift'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
>   389 |                 .reg_shift = regmap_upshift(1),
>       |                              ^

Yes, annoyingly I accidentally it 'u' instead of 'y' in vi which
lower-cased the entire function, and didn't realise before sending the
patch as a theoretical solution to Romain. After build-testing it locally
I did notice it. I would've thought that Romain would've build-tested
before sending out his patch set and would've fixed it up... I didn't
have time to properly fix up my patch (essentially would've ment
redoing the edits from scratch to ensure that it was correct.) Still
don't have time to do that. Sorry.
Romain Gantois April 11, 2024, 6:49 a.m. UTC | #3
Hello Russell,

On Wed, 10 Apr 2024, Russell King (Oracle) wrote:

> patch as a theoretical solution to Romain. After build-testing it locally
> I did notice it. I would've thought that Romain would've build-tested
> before sending out his patch set and would've fixed it up... I didn't
> have time to properly fix up my patch (essentially would've ment

I build-tested the patches but didn't realize that CONFIG_DWMAC_SOCFPGA was not 
enabled in my configuration. So that's my bad, sorry.

Best Regards,
diff mbox series

Patch

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
index 12b4a80ea3aa..67ca163936c8 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
@@ -379,6 +379,58 @@  static int socfpga_gen10_set_phy_mode(struct socfpga_dwmac *dwmac)
 	return 0;
 }
 
+static int socfpga_dwmac_pcs_init(struct stmmac_priv *priv,
+				  struct mac_device_info *hw)
+{
+	struct socfpga_dwmac *dwmac = priv->plat->bsp_priv;
+	struct regmap_config pcs_regmap_cfg = {
+		.reg_bits = 16,
+		.val_bits = 16,
+		.reg_shift = regmap_upshift(1),
+	};
+	struct mdio_regmap_config mrc;
+	struct regmap *pcs_regmap;
+	struct phylink_pcs *pcs;
+	struct mii_bus *pcs_bus;
+
+	if (!dwmac->tse_pcs_base)
+		return 0;
+
+	pcs_regmap = devm_regmap_init_mmio(priv->device, dwmac->tse_pcs_base,
+					   &pcs_regmap_cfg);
+	if (IS_ERR(pcs_regmap))
+		return PTR_ERR(pcs_regmap);
+
+	memset(&mrc, 0, sizeof(mrc));
+	mrc.regmap = pcs_regmap;
+	mrc.parent = priv->device;
+	mrc.valid_addr = 0x0;
+	mrc.autoscan = false;
+
+	/* Can't use ndev->name here because it will not have been initialised,
+	 * and in any case, the user can rename network interfaces at runtime.
+	 */
+	snprintf(mrc.name, MII_BUS_ID_SIZE, "%s-pcs-mii",
+		 dev_name(priv->device));
+	pcs_bus = devm_mdio_regmap_register(priv->device, &mrc);
+	if (IS_ERR(pcs_bus))
+		return PTR_ERR(pcs_bus);
+
+	pcs = lynx_pcs_create_mdiodev(pcs_bus, 0);
+	if (IS_ERR(pcs))
+		return PTR_ERR(pcs);
+
+	hw->phylink_pcs = pcs;
+	return 0;
+}
+
+static void socfpga_dwmac_pcs_exit(struct stmmac_priv *priv,
+				   struct mac_device_info *hw)
+{
+	if (hw->phylink_pcs)
+		lynx_pcs_destroy(hw->phylink_pcs);
+}
+
 static int socfpga_dwmac_probe(struct platform_device *pdev)
 {
 	struct plat_stmmacenet_data *plat_dat;
@@ -426,6 +478,8 @@  static int socfpga_dwmac_probe(struct platform_device *pdev)
 	dwmac->ops = ops;
 	plat_dat->bsp_priv = dwmac;
 	plat_dat->fix_mac_speed = socfpga_dwmac_fix_mac_speed;
+	plat_dat->pcs_init = socfpga_dwmac_pcs_init;
+	plat_dat->pcs_exit = socfpga_dwmac_pcs_exit;
 
 	ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
 	if (ret)
@@ -444,48 +498,6 @@  static int socfpga_dwmac_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_dvr_remove;
 
-	/* Create a regmap for the PCS so that it can be used by the PCS driver,
-	 * if we have such a PCS
-	 */
-	if (dwmac->tse_pcs_base) {
-		struct regmap_config pcs_regmap_cfg;
-		struct mdio_regmap_config mrc;
-		struct regmap *pcs_regmap;
-		struct mii_bus *pcs_bus;
-
-		memset(&pcs_regmap_cfg, 0, sizeof(pcs_regmap_cfg));
-		memset(&mrc, 0, sizeof(mrc));
-
-		pcs_regmap_cfg.reg_bits = 16;
-		pcs_regmap_cfg.val_bits = 16;
-		pcs_regmap_cfg.reg_shift = REGMAP_UPSHIFT(1);
-
-		pcs_regmap = devm_regmap_init_mmio(&pdev->dev, dwmac->tse_pcs_base,
-						   &pcs_regmap_cfg);
-		if (IS_ERR(pcs_regmap)) {
-			ret = PTR_ERR(pcs_regmap);
-			goto err_dvr_remove;
-		}
-
-		mrc.regmap = pcs_regmap;
-		mrc.parent = &pdev->dev;
-		mrc.valid_addr = 0x0;
-		mrc.autoscan = false;
-
-		snprintf(mrc.name, MII_BUS_ID_SIZE, "%s-pcs-mii", ndev->name);
-		pcs_bus = devm_mdio_regmap_register(&pdev->dev, &mrc);
-		if (IS_ERR(pcs_bus)) {
-			ret = PTR_ERR(pcs_bus);
-			goto err_dvr_remove;
-		}
-
-		stpriv->hw->phylink_pcs = lynx_pcs_create_mdiodev(pcs_bus, 0);
-		if (IS_ERR(stpriv->hw->phylink_pcs)) {
-			ret = PTR_ERR(stpriv->hw->phylink_pcs);
-			goto err_dvr_remove;
-		}
-	}
-
 	return 0;
 
 err_dvr_remove:
@@ -494,17 +506,6 @@  static int socfpga_dwmac_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static void socfpga_dwmac_remove(struct platform_device *pdev)
-{
-	struct net_device *ndev = platform_get_drvdata(pdev);
-	struct stmmac_priv *priv = netdev_priv(ndev);
-	struct phylink_pcs *pcs = priv->hw->phylink_pcs;
-
-	stmmac_pltfr_remove(pdev);
-
-	lynx_pcs_destroy(pcs);
-}
-
 #ifdef CONFIG_PM_SLEEP
 static int socfpga_dwmac_resume(struct device *dev)
 {
@@ -576,7 +577,7 @@  MODULE_DEVICE_TABLE(of, socfpga_dwmac_match);
 
 static struct platform_driver socfpga_dwmac_driver = {
 	.probe  = socfpga_dwmac_probe,
-	.remove_new = socfpga_dwmac_remove,
+	.remove_new = stmmac_pltfr_remove,
 	.driver = {
 		.name           = "socfpga-dwmac",
 		.pm		= &socfpga_dwmac_pm_ops,