[PATCH net-next v4 00/10] net: sunhme: Probe/IRQ cleanups

[PATCH net-next v4 00/10] net: sunhme: Probe/IRQ cleanups

[Sean Anderson]

Well, I've had these patches kicking around in my tree since last October, so I
guess I had better get around to posting them. This series is mainly a
cleanup/consolidation of the probe process, with some interrupt changes as well.
Some of these changes are SBUS- (AKA SPARC-) specific, so this should really get
some testing there as well to ensure nothing breaks. I've CC'd a few SPARC
mailing lists in hopes that someone there can try this out. I also have an SBUS
card I ordered by mistake if anyone has a SPARC computer but lacks this card.

Changes in v4:
- Tweak variable order for yuletide
- Move uninitialized return to its own commit
- Use correct SBUS/PCI accessors
- Rework hme_version to set the default in pci/sbus_probe and override it (if
  necessary) in common_probe

Changes in v3:
- Incorperate a fix from another series into this commit

Changes in v2:
- Move happy_meal_begin_auto_negotiation earlier and remove forward declaration
- Make some more includes common
- Clean up mac address init
- Inline error returns

Sean Anderson (10):
  net: sunhme: Fix uninitialized return code
  net: sunhme: Just restart autonegotiation if we can't bring the link
    up
  net: sunhme: Remove residual polling code
  net: sunhme: Unify IRQ requesting
  net: sunhme: Alphabetize includes
  net: sunhme: Switch SBUS to devres
  net: sunhme: Consolidate mac address initialization
  net: sunhme: Clean up mac address init
  net: sunhme: Inline error returns
  net: sunhme: Consolidate common probe tasks

 drivers/net/ethernet/sun/sunhme.c | 1155 +++++++++++------------------
 drivers/net/ethernet/sun/sunhme.h |    6 +-
 2 files changed, 418 insertions(+), 743 deletions(-)

-- 
2.37.1

[PATCH net-next v4 01/10] net: sunhme: Fix uninitialized return code

[Sean Anderson]

Fix an uninitialized return code if we never found a qfe slot. It would be
a bug if we ever got into this situation, but it's good to return something
tracable.

Fixes: acb3f35f920b ("sunhme: forward the error code from pci_enable_device()")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Sean Anderson <seanga2@gmail.com>
---

Changes in v4:
- Move this fix to its own commit

 drivers/net/ethernet/sun/sunhme.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
index b0c7ab74a82e..7cf8210ebbec 100644
--- a/drivers/net/ethernet/sun/sunhme.c
+++ b/drivers/net/ethernet/sun/sunhme.c
@@ -2834,7 +2834,7 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
 	int i, qfe_slot = -1;
 	char prom_name[64];
 	u8 addr[ETH_ALEN];
-	int err;
+	int err = -ENODEV;
 
 	/* Now make sure pci_dev cookie is there. */
 #ifdef CONFIG_SPARC
-- 
2.37.1

Re: [PATCH net-next v4 01/10] net: sunhme: Fix uninitialized return code

[Simon Horman]

Hi Sean,

On Fri, Mar 24, 2023 at 01:51:27PM -0400, Sean Anderson wrote:
> Fix an uninitialized return code if we never found a qfe slot. It would be
> a bug if we ever got into this situation, but it's good to return something
> tracable.
> 
> Fixes: acb3f35f920b ("sunhme: forward the error code from pci_enable_device()")

I think it might be,

Fixes: 5b3dc6dda6b1 ("sunhme: Regularize probe errors")

> Reported-by: kernel test robot <lkp@intel.com>
> Reported-by: Dan Carpenter <error27@gmail.com>

Checkpatch requests a Link tag after Reported-by tags.

Link: https://lore.kernel.org/oe-kbuild/20230222135715.hjXBN9H5dr7nCnI_Ye2s5H--HsnWom4o9AMScThhDRM@z/T/

> Signed-off-by: Sean Anderson <seanga2@gmail.com>
> ---
> 
> Changes in v4:
> - Move this fix to its own commit
> 
>  drivers/net/ethernet/sun/sunhme.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
> index b0c7ab74a82e..7cf8210ebbec 100644
> --- a/drivers/net/ethernet/sun/sunhme.c
> +++ b/drivers/net/ethernet/sun/sunhme.c
> @@ -2834,7 +2834,7 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
>  	int i, qfe_slot = -1;
>  	char prom_name[64];
>  	u8 addr[ETH_ALEN];
> -	int err;
> +	int err = -ENODEV;
>  
>  	/* Now make sure pci_dev cookie is there. */
>  #ifdef CONFIG_SPARC

Unfortunately I don't think this is the right fix,
and indeed smatch still complains with it applied.

The reason is that a few lines further down there is:

        err = pcim_enable_device(pdev);
        if (err)
                goto err_out;

Which overrides the initialisation of err.
Before getting to the line that smatch highlights, correctly as far
as I can tell, as having a missing error code.

			if (qfe_slot == 4)
				goto err_out;

As err_out simply calls 'return err' one could just return here.
And perhaps that is a nice cleanup to roll out at some point.
But to be in keeping with the style of the function, as a minimal fix,
I think the following might be appropriate.

Note, with this applied err doesn't need to be initialised at the top of
the function (as far as my invocation of smatch is concerned).

diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
index b0c7ab74a82e..d6df778a0052 100644
--- a/drivers/net/ethernet/sun/sunhme.c
+++ b/drivers/net/ethernet/sun/sunhme.c
@@ -2863,8 +2863,10 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
 			if (!qp->happy_meals[qfe_slot])
 				break;
 
-		if (qfe_slot == 4)
+		if (qfe_slot == 4) {
+			err = -ENODEV;
 			goto err_out;
+		}
 	}
 
 	dev = devm_alloc_etherdev(&pdev->dev, sizeof(struct happy_meal));

Re: [PATCH net-next v4 01/10] net: sunhme: Fix uninitialized return code

[Simon Horman]

On Sat, Mar 25, 2023 at 09:17:03AM +0100, Simon Horman wrote:
> Hi Sean,
> 
> On Fri, Mar 24, 2023 at 01:51:27PM -0400, Sean Anderson wrote:
> > Fix an uninitialized return code if we never found a qfe slot. It would be
> > a bug if we ever got into this situation, but it's good to return something
> > tracable.
> > 
> > Fixes: acb3f35f920b ("sunhme: forward the error code from pci_enable_device()")
> 
> I think it might be,
> 
> Fixes: 5b3dc6dda6b1 ("sunhme: Regularize probe errors")
> 
> > Reported-by: kernel test robot <lkp@intel.com>
> > Reported-by: Dan Carpenter <error27@gmail.com>
> 
> Checkpatch requests a Link tag after Reported-by tags.
> 
> Link: https://lore.kernel.org/oe-kbuild/20230222135715.hjXBN9H5dr7nCnI_Ye2s5H--HsnWom4o9AMScThhDRM@z/T/
> 
> > Signed-off-by: Sean Anderson <seanga2@gmail.com>
> > ---
> > 
> > Changes in v4:
> > - Move this fix to its own commit
> > 
> >  drivers/net/ethernet/sun/sunhme.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
> > index b0c7ab74a82e..7cf8210ebbec 100644
> > --- a/drivers/net/ethernet/sun/sunhme.c
> > +++ b/drivers/net/ethernet/sun/sunhme.c
> > @@ -2834,7 +2834,7 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
> >  	int i, qfe_slot = -1;
> >  	char prom_name[64];
> >  	u8 addr[ETH_ALEN];
> > -	int err;
> > +	int err = -ENODEV;
> >  
> >  	/* Now make sure pci_dev cookie is there. */
> >  #ifdef CONFIG_SPARC
> 
> Unfortunately I don't think this is the right fix,
> and indeed smatch still complains with it applied.
> 
> The reason is that a few lines further down there is:
> 
>         err = pcim_enable_device(pdev);
>         if (err)
>                 goto err_out;
> 
> Which overrides the initialisation of err.
> Before getting to the line that smatch highlights, correctly as far
> as I can tell, as having a missing error code.
> 
> 			if (qfe_slot == 4)
> 				goto err_out;
> 
> As err_out simply calls 'return err' one could just return here.
> And perhaps that is a nice cleanup to roll out at some point.

I see that point is patch 9/10, which also fixes the bug
reported by smatch :)

> But to be in keeping with the style of the function, as a minimal fix,
> I think the following might be appropriate.
> 
> Note, with this applied err doesn't need to be initialised at the top of
> the function (as far as my invocation of smatch is concerned).
> 
> diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
> index b0c7ab74a82e..d6df778a0052 100644
> --- a/drivers/net/ethernet/sun/sunhme.c
> +++ b/drivers/net/ethernet/sun/sunhme.c
> @@ -2863,8 +2863,10 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
>  			if (!qp->happy_meals[qfe_slot])
>  				break;
>  
> -		if (qfe_slot == 4)
> +		if (qfe_slot == 4) {
> +			err = -ENODEV;
>  			goto err_out;
> +		}
>  	}
>  
>  	dev = devm_alloc_etherdev(&pdev->dev, sizeof(struct happy_meal));
> 

[PATCH net-next v4 02/10] net: sunhme: Just restart autonegotiation if we can't bring the link up

[Sean Anderson]

If we've tried regular autonegotiation and forcing the link mode, just
restart autonegotiation instead of reinitializing the whole NIC.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
---

(no changes since v2)

Changes in v2:
- Move happy_meal_begin_auto_negotiation earlier and remove forward declaration

 drivers/net/ethernet/sun/sunhme.c | 245 +++++++++++++++---------------
 1 file changed, 119 insertions(+), 126 deletions(-)

diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
index 7cf8210ebbec..e52f2d9305bc 100644
--- a/drivers/net/ethernet/sun/sunhme.c
+++ b/drivers/net/ethernet/sun/sunhme.c
@@ -589,8 +589,6 @@ static int set_happy_link_modes(struct happy_meal *hp, void __iomem *tregs)
 	return 1;
 }
 
-static int happy_meal_init(struct happy_meal *hp);
-
 static int is_lucent_phy(struct happy_meal *hp)
 {
 	void __iomem *tregs = hp->tcvregs;
@@ -606,6 +604,124 @@ static int is_lucent_phy(struct happy_meal *hp)
 	return ret;
 }
 
+/* hp->happy_lock must be held */
+static void
+happy_meal_begin_auto_negotiation(struct happy_meal *hp,
+				  void __iomem *tregs,
+				  const struct ethtool_link_ksettings *ep)
+{
+	int timeout;
+
+	/* Read all of the registers we are interested in now. */
+	hp->sw_bmsr      = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
+	hp->sw_bmcr      = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
+	hp->sw_physid1   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID1);
+	hp->sw_physid2   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID2);
+
+	/* XXX Check BMSR_ANEGCAPABLE, should not be necessary though. */
+
+	hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
+	if (!ep || ep->base.autoneg == AUTONEG_ENABLE) {
+		/* Advertise everything we can support. */
+		if (hp->sw_bmsr & BMSR_10HALF)
+			hp->sw_advertise |= (ADVERTISE_10HALF);
+		else
+			hp->sw_advertise &= ~(ADVERTISE_10HALF);
+
+		if (hp->sw_bmsr & BMSR_10FULL)
+			hp->sw_advertise |= (ADVERTISE_10FULL);
+		else
+			hp->sw_advertise &= ~(ADVERTISE_10FULL);
+		if (hp->sw_bmsr & BMSR_100HALF)
+			hp->sw_advertise |= (ADVERTISE_100HALF);
+		else
+			hp->sw_advertise &= ~(ADVERTISE_100HALF);
+		if (hp->sw_bmsr & BMSR_100FULL)
+			hp->sw_advertise |= (ADVERTISE_100FULL);
+		else
+			hp->sw_advertise &= ~(ADVERTISE_100FULL);
+		happy_meal_tcvr_write(hp, tregs, MII_ADVERTISE, hp->sw_advertise);
+
+		/* XXX Currently no Happy Meal cards I know off support 100BaseT4,
+		 * XXX and this is because the DP83840 does not support it, changes
+		 * XXX would need to be made to the tx/rx logic in the driver as well
+		 * XXX so I completely skip checking for it in the BMSR for now.
+		 */
+
+		ASD("Advertising [ %s%s%s%s]\n",
+		    hp->sw_advertise & ADVERTISE_10HALF ? "10H " : "",
+		    hp->sw_advertise & ADVERTISE_10FULL ? "10F " : "",
+		    hp->sw_advertise & ADVERTISE_100HALF ? "100H " : "",
+		    hp->sw_advertise & ADVERTISE_100FULL ? "100F " : "");
+
+		/* Enable Auto-Negotiation, this is usually on already... */
+		hp->sw_bmcr |= BMCR_ANENABLE;
+		happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
+
+		/* Restart it to make sure it is going. */
+		hp->sw_bmcr |= BMCR_ANRESTART;
+		happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
+
+		/* BMCR_ANRESTART self clears when the process has begun. */
+
+		timeout = 64;  /* More than enough. */
+		while (--timeout) {
+			hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
+			if (!(hp->sw_bmcr & BMCR_ANRESTART))
+				break; /* got it. */
+			udelay(10);
+		}
+		if (!timeout) {
+			netdev_err(hp->dev,
+				   "Happy Meal would not start auto negotiation BMCR=0x%04x\n",
+				   hp->sw_bmcr);
+			netdev_notice(hp->dev,
+				      "Performing force link detection.\n");
+			goto force_link;
+		} else {
+			hp->timer_state = arbwait;
+		}
+	} else {
+force_link:
+		/* Force the link up, trying first a particular mode.
+		 * Either we are here at the request of ethtool or
+		 * because the Happy Meal would not start to autoneg.
+		 */
+
+		/* Disable auto-negotiation in BMCR, enable the duplex and
+		 * speed setting, init the timer state machine, and fire it off.
+		 */
+		if (!ep || ep->base.autoneg == AUTONEG_ENABLE) {
+			hp->sw_bmcr = BMCR_SPEED100;
+		} else {
+			if (ep->base.speed == SPEED_100)
+				hp->sw_bmcr = BMCR_SPEED100;
+			else
+				hp->sw_bmcr = 0;
+			if (ep->base.duplex == DUPLEX_FULL)
+				hp->sw_bmcr |= BMCR_FULLDPLX;
+		}
+		happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
+
+		if (!is_lucent_phy(hp)) {
+			/* OK, seems we need do disable the transceiver for the first
+			 * tick to make sure we get an accurate link state at the
+			 * second tick.
+			 */
+			hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs,
+							       DP83840_CSCONFIG);
+			hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
+			happy_meal_tcvr_write(hp, tregs, DP83840_CSCONFIG,
+					      hp->sw_csconfig);
+		}
+		hp->timer_state = ltrywait;
+	}
+
+	hp->timer_ticks = 0;
+	hp->happy_timer.expires = jiffies + (12 * HZ)/10;  /* 1.2 sec. */
+	add_timer(&hp->happy_timer);
+}
+
 static void happy_meal_timer(struct timer_list *t)
 {
 	struct happy_meal *hp = from_timer(hp, t, happy_timer);
@@ -743,12 +859,7 @@ static void happy_meal_timer(struct timer_list *t)
 					netdev_notice(hp->dev,
 						      "Link down, cable problem?\n");
 
-					ret = happy_meal_init(hp);
-					if (ret) {
-						/* ho hum... */
-						netdev_err(hp->dev,
-							   "Error, cannot re-init the Happy Meal.\n");
-					}
+					happy_meal_begin_auto_negotiation(hp, tregs, NULL);
 					goto out;
 				}
 				if (!is_lucent_phy(hp)) {
@@ -1201,124 +1312,6 @@ static void happy_meal_init_rings(struct happy_meal *hp)
 	HMD("done\n");
 }
 
-/* hp->happy_lock must be held */
-static void
-happy_meal_begin_auto_negotiation(struct happy_meal *hp,
-				  void __iomem *tregs,
-				  const struct ethtool_link_ksettings *ep)
-{
-	int timeout;
-
-	/* Read all of the registers we are interested in now. */
-	hp->sw_bmsr      = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
-	hp->sw_bmcr      = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
-	hp->sw_physid1   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID1);
-	hp->sw_physid2   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID2);
-
-	/* XXX Check BMSR_ANEGCAPABLE, should not be necessary though. */
-
-	hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
-	if (!ep || ep->base.autoneg == AUTONEG_ENABLE) {
-		/* Advertise everything we can support. */
-		if (hp->sw_bmsr & BMSR_10HALF)
-			hp->sw_advertise |= (ADVERTISE_10HALF);
-		else
-			hp->sw_advertise &= ~(ADVERTISE_10HALF);
-
-		if (hp->sw_bmsr & BMSR_10FULL)
-			hp->sw_advertise |= (ADVERTISE_10FULL);
-		else
-			hp->sw_advertise &= ~(ADVERTISE_10FULL);
-		if (hp->sw_bmsr & BMSR_100HALF)
-			hp->sw_advertise |= (ADVERTISE_100HALF);
-		else
-			hp->sw_advertise &= ~(ADVERTISE_100HALF);
-		if (hp->sw_bmsr & BMSR_100FULL)
-			hp->sw_advertise |= (ADVERTISE_100FULL);
-		else
-			hp->sw_advertise &= ~(ADVERTISE_100FULL);
-		happy_meal_tcvr_write(hp, tregs, MII_ADVERTISE, hp->sw_advertise);
-
-		/* XXX Currently no Happy Meal cards I know off support 100BaseT4,
-		 * XXX and this is because the DP83840 does not support it, changes
-		 * XXX would need to be made to the tx/rx logic in the driver as well
-		 * XXX so I completely skip checking for it in the BMSR for now.
-		 */
-
-		ASD("Advertising [ %s%s%s%s]\n",
-		    hp->sw_advertise & ADVERTISE_10HALF ? "10H " : "",
-		    hp->sw_advertise & ADVERTISE_10FULL ? "10F " : "",
-		    hp->sw_advertise & ADVERTISE_100HALF ? "100H " : "",
-		    hp->sw_advertise & ADVERTISE_100FULL ? "100F " : "");
-
-		/* Enable Auto-Negotiation, this is usually on already... */
-		hp->sw_bmcr |= BMCR_ANENABLE;
-		happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
-
-		/* Restart it to make sure it is going. */
-		hp->sw_bmcr |= BMCR_ANRESTART;
-		happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
-
-		/* BMCR_ANRESTART self clears when the process has begun. */
-
-		timeout = 64;  /* More than enough. */
-		while (--timeout) {
-			hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
-			if (!(hp->sw_bmcr & BMCR_ANRESTART))
-				break; /* got it. */
-			udelay(10);
-		}
-		if (!timeout) {
-			netdev_err(hp->dev,
-				   "Happy Meal would not start auto negotiation BMCR=0x%04x\n",
-				   hp->sw_bmcr);
-			netdev_notice(hp->dev,
-				      "Performing force link detection.\n");
-			goto force_link;
-		} else {
-			hp->timer_state = arbwait;
-		}
-	} else {
-force_link:
-		/* Force the link up, trying first a particular mode.
-		 * Either we are here at the request of ethtool or
-		 * because the Happy Meal would not start to autoneg.
-		 */
-
-		/* Disable auto-negotiation in BMCR, enable the duplex and
-		 * speed setting, init the timer state machine, and fire it off.
-		 */
-		if (!ep || ep->base.autoneg == AUTONEG_ENABLE) {
-			hp->sw_bmcr = BMCR_SPEED100;
-		} else {
-			if (ep->base.speed == SPEED_100)
-				hp->sw_bmcr = BMCR_SPEED100;
-			else
-				hp->sw_bmcr = 0;
-			if (ep->base.duplex == DUPLEX_FULL)
-				hp->sw_bmcr |= BMCR_FULLDPLX;
-		}
-		happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
-
-		if (!is_lucent_phy(hp)) {
-			/* OK, seems we need do disable the transceiver for the first
-			 * tick to make sure we get an accurate link state at the
-			 * second tick.
-			 */
-			hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs,
-							       DP83840_CSCONFIG);
-			hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
-			happy_meal_tcvr_write(hp, tregs, DP83840_CSCONFIG,
-					      hp->sw_csconfig);
-		}
-		hp->timer_state = ltrywait;
-	}
-
-	hp->timer_ticks = 0;
-	hp->happy_timer.expires = jiffies + (12 * HZ)/10;  /* 1.2 sec. */
-	add_timer(&hp->happy_timer);
-}
-
 /* hp->happy_lock must be held */
 static int happy_meal_init(struct happy_meal *hp)
 {
-- 
2.37.1

[PATCH net-next v4 03/10] net: sunhme: Remove residual polling code

[Sean Anderson]

The sunhme driver never used the hardware MII polling feature. Even the
if-def'd out happy_meal_poll_start was removed by 2002 [1]. Remove the
various places in the driver which needlessly guard against MII interrupts
which will never be enabled.

[1] https://lwn.net/2002/0411/a/2.5.8-pre3.php3

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
---

(no changes since v1)

 drivers/net/ethernet/sun/sunhme.c | 134 ++++--------------------------
 drivers/net/ethernet/sun/sunhme.h |   6 +-
 2 files changed, 18 insertions(+), 122 deletions(-)

diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
index e52f2d9305bc..b02cb0b493ae 100644
--- a/drivers/net/ethernet/sun/sunhme.c
+++ b/drivers/net/ethernet/sun/sunhme.c
@@ -985,32 +985,6 @@ static void happy_meal_get_counters(struct happy_meal *hp, void __iomem *bregs)
 	hme_write32(hp, bregs + BMAC_LTCTR, 0);
 }
 
-/* hp->happy_lock must be held */
-static void happy_meal_poll_stop(struct happy_meal *hp, void __iomem *tregs)
-{
-	/* If polling disabled or not polling already, nothing to do. */
-	if ((hp->happy_flags & (HFLAG_POLLENABLE | HFLAG_POLL)) !=
-	   (HFLAG_POLLENABLE | HFLAG_POLL)) {
-		ASD("not polling, return\n");
-		return;
-	}
-
-	/* Shut up the MIF. */
-	ASD("were polling, mif ints off, polling off\n");
-	hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
-
-	/* Turn off polling. */
-	hme_write32(hp, tregs + TCVR_CFG,
-		    hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_PENABLE));
-
-	/* We are no longer polling. */
-	hp->happy_flags &= ~(HFLAG_POLL);
-
-	/* Let the bits set. */
-	udelay(200);
-	ASD("done\n");
-}
-
 /* Only Sun can take such nice parts and fuck up the programming interface
  * like this.  Good job guys...
  */
@@ -1115,57 +1089,26 @@ static int happy_meal_tcvr_reset(struct happy_meal *hp, void __iomem *tregs)
 static void happy_meal_transceiver_check(struct happy_meal *hp, void __iomem *tregs)
 {
 	unsigned long tconfig = hme_read32(hp, tregs + TCVR_CFG);
+	u32 reread = hme_read32(hp, tregs + TCVR_CFG);
 
 	ASD("tcfg=%08lx\n", tconfig);
-	if (hp->happy_flags & HFLAG_POLL) {
-		/* If we are polling, we must stop to get the transceiver type. */
-		if (hp->tcvr_type == internal) {
-			if (tconfig & TCV_CFG_MDIO1) {
-				happy_meal_poll_stop(hp, tregs);
-				hp->paddr = TCV_PADDR_ETX;
-				hp->tcvr_type = external;
-				tconfig &= ~(TCV_CFG_PENABLE);
-				tconfig |= TCV_CFG_PSELECT;
-				hme_write32(hp, tregs + TCVR_CFG, tconfig);
-				ASD("poll stop, internal->external\n");
-			}
-		} else {
-			if (hp->tcvr_type == external) {
-				if (!(hme_read32(hp, tregs + TCVR_STATUS) >> 16)) {
-					happy_meal_poll_stop(hp, tregs);
-					hp->paddr = TCV_PADDR_ITX;
-					hp->tcvr_type = internal;
-					hme_write32(hp, tregs + TCVR_CFG,
-						    hme_read32(hp, tregs + TCVR_CFG) &
-						    ~(TCV_CFG_PSELECT));
-					ASD("poll stop, external->internal\n");
-				}
-			} else {
-				ASD("polling, none\n");
-			}
-		}
+	if (reread & TCV_CFG_MDIO1) {
+		hme_write32(hp, tregs + TCVR_CFG, tconfig | TCV_CFG_PSELECT);
+		hp->paddr = TCV_PADDR_ETX;
+		hp->tcvr_type = external;
+		ASD("not polling, external\n");
 	} else {
-		u32 reread = hme_read32(hp, tregs + TCVR_CFG);
-
-		/* Else we can just work off of the MDIO bits. */
-		if (reread & TCV_CFG_MDIO1) {
-			hme_write32(hp, tregs + TCVR_CFG, tconfig | TCV_CFG_PSELECT);
-			hp->paddr = TCV_PADDR_ETX;
-			hp->tcvr_type = external;
-			ASD("not polling, external\n");
+		if (reread & TCV_CFG_MDIO0) {
+			hme_write32(hp, tregs + TCVR_CFG,
+				    tconfig & ~(TCV_CFG_PSELECT));
+			hp->paddr = TCV_PADDR_ITX;
+			hp->tcvr_type = internal;
+			ASD("not polling, internal\n");
 		} else {
-			if (reread & TCV_CFG_MDIO0) {
-				hme_write32(hp, tregs + TCVR_CFG,
-					    tconfig & ~(TCV_CFG_PSELECT));
-				hp->paddr = TCV_PADDR_ITX;
-				hp->tcvr_type = internal;
-				ASD("not polling, internal\n");
-			} else {
-				netdev_err(hp->dev,
-					   "Transceiver and a coke please.");
-				hp->tcvr_type = none; /* Grrr... */
-				ASD("not polling, none\n");
-			}
+			netdev_err(hp->dev,
+				   "Transceiver and a coke please.");
+			hp->tcvr_type = none; /* Grrr... */
+			ASD("not polling, none\n");
 		}
 	}
 }
@@ -1334,10 +1277,6 @@ static int happy_meal_init(struct happy_meal *hp)
 		happy_meal_get_counters(hp, bregs);
 	}
 
-	/* Stop polling. */
-	HMD("to happy_meal_poll_stop\n");
-	happy_meal_poll_stop(hp, tregs);
-
 	/* Stop transmitter and receiver. */
 	HMD("to happy_meal_stop\n");
 	happy_meal_stop(hp, gregs);
@@ -1346,11 +1285,6 @@ static int happy_meal_init(struct happy_meal *hp)
 	HMD("to happy_meal_init_rings\n");
 	happy_meal_init_rings(hp);
 
-	/* Shut up the MIF. */
-	HMD("Disable all MIF irqs (old[%08x])\n",
-	    hme_read32(hp, tregs + TCVR_IMASK));
-	hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
-
 	/* See if we can enable the MIF frame on this card to speak to the DP83840. */
 	if (hp->happy_flags & HFLAG_FENABLE) {
 		HMD("use frame old[%08x]\n",
@@ -1605,7 +1539,6 @@ static void happy_meal_set_initial_advertisement(struct happy_meal *hp)
 	void __iomem *gregs	= hp->gregs;
 
 	happy_meal_stop(hp, gregs);
-	hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
 	if (hp->happy_flags & HFLAG_FENABLE)
 		hme_write32(hp, tregs + TCVR_CFG,
 			    hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_BENABLE));
@@ -1762,34 +1695,6 @@ static int happy_meal_is_not_so_happy(struct happy_meal *hp, u32 status)
 	return 0;
 }
 
-/* hp->happy_lock must be held */
-static void happy_meal_mif_interrupt(struct happy_meal *hp)
-{
-	void __iomem *tregs = hp->tcvregs;
-
-	netdev_info(hp->dev, "Link status change.\n");
-	hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
-	hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
-
-	/* Use the fastest transmission protocol possible. */
-	if (hp->sw_lpa & LPA_100FULL) {
-		netdev_info(hp->dev, "Switching to 100Mbps at full duplex.\n");
-		hp->sw_bmcr |= (BMCR_FULLDPLX | BMCR_SPEED100);
-	} else if (hp->sw_lpa & LPA_100HALF) {
-		netdev_info(hp->dev, "Switching to 100MBps at half duplex.\n");
-		hp->sw_bmcr |= BMCR_SPEED100;
-	} else if (hp->sw_lpa & LPA_10FULL) {
-		netdev_info(hp->dev, "Switching to 10MBps at full duplex.\n");
-		hp->sw_bmcr |= BMCR_FULLDPLX;
-	} else {
-		netdev_info(hp->dev, "Using 10Mbps at half duplex.\n");
-	}
-	happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
-
-	/* Finally stop polling and shut up the MIF. */
-	happy_meal_poll_stop(hp, tregs);
-}
-
 /* hp->happy_lock must be held */
 static void happy_meal_tx(struct happy_meal *hp)
 {
@@ -1973,9 +1878,6 @@ static irqreturn_t happy_meal_interrupt(int irq, void *dev_id)
 			goto out;
 	}
 
-	if (happy_status & GREG_STAT_MIFIRQ)
-		happy_meal_mif_interrupt(hp);
-
 	if (happy_status & GREG_STAT_TXALL)
 		happy_meal_tx(hp);
 
@@ -2003,7 +1905,6 @@ static irqreturn_t quattro_sbus_interrupt(int irq, void *cookie)
 		HMD("status=%08x\n", happy_status);
 
 		if (!(happy_status & (GREG_STAT_ERRORS |
-				      GREG_STAT_MIFIRQ |
 				      GREG_STAT_TXALL |
 				      GREG_STAT_RXTOHOST)))
 			continue;
@@ -2014,9 +1915,6 @@ static irqreturn_t quattro_sbus_interrupt(int irq, void *cookie)
 			if (happy_meal_is_not_so_happy(hp, happy_status))
 				goto next;
 
-		if (happy_status & GREG_STAT_MIFIRQ)
-			happy_meal_mif_interrupt(hp);
-
 		if (happy_status & GREG_STAT_TXALL)
 			happy_meal_tx(hp);
 
diff --git a/drivers/net/ethernet/sun/sunhme.h b/drivers/net/ethernet/sun/sunhme.h
index 9118c60c9426..258b4c7fe962 100644
--- a/drivers/net/ethernet/sun/sunhme.h
+++ b/drivers/net/ethernet/sun/sunhme.h
@@ -462,22 +462,20 @@ struct happy_meal {
 };
 
 /* Here are the happy flags. */
-#define HFLAG_POLL                0x00000001      /* We are doing MIF polling          */
 #define HFLAG_FENABLE             0x00000002      /* The MII frame is enabled          */
 #define HFLAG_LANCE               0x00000004      /* We are using lance-mode           */
 #define HFLAG_RXENABLE            0x00000008      /* Receiver is enabled               */
 #define HFLAG_AUTO                0x00000010      /* Using auto-negotiation, 0 = force */
 #define HFLAG_FULL                0x00000020      /* Full duplex enable                */
 #define HFLAG_MACFULL             0x00000040      /* Using full duplex in the MAC      */
-#define HFLAG_POLLENABLE          0x00000080      /* Actually try MIF polling          */
 #define HFLAG_RXCV                0x00000100      /* XXX RXCV ENABLE                   */
 #define HFLAG_INIT                0x00000200      /* Init called at least once         */
 #define HFLAG_LINKUP              0x00000400      /* 1 = Link is up                    */
 #define HFLAG_PCI                 0x00000800      /* PCI based Happy Meal              */
 #define HFLAG_QUATTRO		  0x00001000      /* On QFE/Quattro card	       */
 
-#define HFLAG_20_21  (HFLAG_POLLENABLE | HFLAG_FENABLE)
-#define HFLAG_NOT_A0 (HFLAG_POLLENABLE | HFLAG_FENABLE | HFLAG_LANCE | HFLAG_RXCV)
+#define HFLAG_20_21  HFLAG_FENABLE
+#define HFLAG_NOT_A0 (HFLAG_FENABLE | HFLAG_LANCE | HFLAG_RXCV)
 
 /* Support for QFE/Quattro cards. */
 struct quattro {
-- 
2.37.1

[PATCH net-next v4 04/10] net: sunhme: Unify IRQ requesting

[Sean Anderson]

Instead of registering one interrupt handler for all four SBUS Quattro
HMEs, let each HME register its own handler. To make this work, we don't
handle the IRQ if none of the status bits are set. This reduces the
complexity of the driver, and makes it easier to ensure things happen
before/after enabling IRQs.

I'm not really sure why we request IRQs in two different places (and leave
them running after removing the driver!). A lot of things in this driver
seem to just be crusty, and not necessarily intentional. I'm assuming
that's the case here as well.

This really needs to be tested by someone with an SBUS Quattro card.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
---

(no changes since v1)

 drivers/net/ethernet/sun/sunhme.c | 131 +++---------------------------
 1 file changed, 10 insertions(+), 121 deletions(-)

diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
index b02cb0b493ae..4efcf60644aa 100644
--- a/drivers/net/ethernet/sun/sunhme.c
+++ b/drivers/net/ethernet/sun/sunhme.c
@@ -1870,6 +1870,8 @@ static irqreturn_t happy_meal_interrupt(int irq, void *dev_id)
 	u32 happy_status       = hme_read32(hp, hp->gregs + GREG_STAT);
 
 	HMD("status=%08x\n", happy_status);
+	if (!happy_status)
+		return IRQ_NONE;
 
 	spin_lock(&hp->happy_lock);
 
@@ -1891,62 +1893,16 @@ static irqreturn_t happy_meal_interrupt(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-#ifdef CONFIG_SBUS
-static irqreturn_t quattro_sbus_interrupt(int irq, void *cookie)
-{
-	struct quattro *qp = (struct quattro *) cookie;
-	int i;
-
-	for (i = 0; i < 4; i++) {
-		struct net_device *dev = qp->happy_meals[i];
-		struct happy_meal *hp  = netdev_priv(dev);
-		u32 happy_status       = hme_read32(hp, hp->gregs + GREG_STAT);
-
-		HMD("status=%08x\n", happy_status);
-
-		if (!(happy_status & (GREG_STAT_ERRORS |
-				      GREG_STAT_TXALL |
-				      GREG_STAT_RXTOHOST)))
-			continue;
-
-		spin_lock(&hp->happy_lock);
-
-		if (happy_status & GREG_STAT_ERRORS)
-			if (happy_meal_is_not_so_happy(hp, happy_status))
-				goto next;
-
-		if (happy_status & GREG_STAT_TXALL)
-			happy_meal_tx(hp);
-
-		if (happy_status & GREG_STAT_RXTOHOST)
-			happy_meal_rx(hp, dev);
-
-	next:
-		spin_unlock(&hp->happy_lock);
-	}
-	HMD("done\n");
-
-	return IRQ_HANDLED;
-}
-#endif
-
 static int happy_meal_open(struct net_device *dev)
 {
 	struct happy_meal *hp = netdev_priv(dev);
 	int res;
 
-	/* On SBUS Quattro QFE cards, all hme interrupts are concentrated
-	 * into a single source which we register handling at probe time.
-	 */
-	if ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO) {
-		res = request_irq(hp->irq, happy_meal_interrupt, IRQF_SHARED,
-				  dev->name, dev);
-		if (res) {
-			HMD("EAGAIN\n");
-			netdev_err(dev, "Can't order irq %d to go.\n", hp->irq);
-
-			return -EAGAIN;
-		}
+	res = request_irq(hp->irq, happy_meal_interrupt, IRQF_SHARED,
+			  dev->name, dev);
+	if (res) {
+		netdev_err(dev, "Can't order irq %d to go.\n", hp->irq);
+		return res;
 	}
 
 	HMD("to happy_meal_init\n");
@@ -1955,7 +1911,7 @@ static int happy_meal_open(struct net_device *dev)
 	res = happy_meal_init(hp);
 	spin_unlock_irq(&hp->happy_lock);
 
-	if (res && ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO))
+	if (res)
 		free_irq(hp->irq, dev);
 	return res;
 }
@@ -1973,12 +1929,7 @@ static int happy_meal_close(struct net_device *dev)
 
 	spin_unlock_irq(&hp->happy_lock);
 
-	/* On Quattro QFE cards, all hme interrupts are concentrated
-	 * into a single source which we register handling at probe
-	 * time and never unregister.
-	 */
-	if ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO)
-		free_irq(hp->irq, dev);
+	free_irq(hp->irq, dev);
 
 	return 0;
 }
@@ -2311,59 +2262,6 @@ static struct quattro *quattro_sbus_find(struct platform_device *child)
 	platform_set_drvdata(op, qp);
 	return qp;
 }
-
-/* After all quattro cards have been probed, we call these functions
- * to register the IRQ handlers for the cards that have been
- * successfully probed and skip the cards that failed to initialize
- */
-static int __init quattro_sbus_register_irqs(void)
-{
-	struct quattro *qp;
-
-	for (qp = qfe_sbus_list; qp != NULL; qp = qp->next) {
-		struct platform_device *op = qp->quattro_dev;
-		int err, qfe_slot, skip = 0;
-
-		for (qfe_slot = 0; qfe_slot < 4; qfe_slot++) {
-			if (!qp->happy_meals[qfe_slot])
-				skip = 1;
-		}
-		if (skip)
-			continue;
-
-		err = request_irq(op->archdata.irqs[0],
-				  quattro_sbus_interrupt,
-				  IRQF_SHARED, "Quattro",
-				  qp);
-		if (err != 0) {
-			dev_err(&op->dev,
-				"Quattro HME: IRQ registration error %d.\n",
-				err);
-			return err;
-		}
-	}
-
-	return 0;
-}
-
-static void quattro_sbus_free_irqs(void)
-{
-	struct quattro *qp;
-
-	for (qp = qfe_sbus_list; qp != NULL; qp = qp->next) {
-		struct platform_device *op = qp->quattro_dev;
-		int qfe_slot, skip = 0;
-
-		for (qfe_slot = 0; qfe_slot < 4; qfe_slot++) {
-			if (!qp->happy_meals[qfe_slot])
-				skip = 1;
-		}
-		if (skip)
-			continue;
-
-		free_irq(op->archdata.irqs[0], qp);
-	}
-}
 #endif /* CONFIG_SBUS */
 
 #ifdef CONFIG_PCI
@@ -3005,8 +2903,6 @@ static int hme_sbus_remove(struct platform_device *op)
 
 	unregister_netdev(net_dev);
 
-	/* XXX qfe parent interrupt... */
-
 	of_iounmap(&op->resource[0], hp->gregs, GREG_REG_SIZE);
 	of_iounmap(&op->resource[1], hp->etxregs, ETX_REG_SIZE);
 	of_iounmap(&op->resource[2], hp->erxregs, ERX_REG_SIZE);
@@ -3050,19 +2946,12 @@ static struct platform_driver hme_sbus_driver = {
 
 static int __init happy_meal_sbus_init(void)
 {
-	int err;
-
-	err = platform_driver_register(&hme_sbus_driver);
-	if (!err)
-		err = quattro_sbus_register_irqs();
-
-	return err;
+	return platform_driver_register(&hme_sbus_driver);
 }
 
 static void happy_meal_sbus_exit(void)
 {
 	platform_driver_unregister(&hme_sbus_driver);
-	quattro_sbus_free_irqs();
 
 	while (qfe_sbus_list) {
 		struct quattro *qfe = qfe_sbus_list;
-- 
2.37.1

[PATCH net-next v4 05/10] net: sunhme: Alphabetize includes

[Sean Anderson]

Alphabetize includes to make it clearer where to add new ones.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
---

(no changes since v2)

Changes in v2:
- Make some more includes common

 drivers/net/ethernet/sun/sunhme.c | 59 ++++++++++++++-----------------
 1 file changed, 27 insertions(+), 32 deletions(-)

diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
index 4efcf60644aa..e9613db3bdee 100644
--- a/drivers/net/ethernet/sun/sunhme.c
+++ b/drivers/net/ethernet/sun/sunhme.c
@@ -14,48 +14,43 @@
  *     argument : macaddr=0x00,0x10,0x20,0x30,0x40,0x50
  */
 
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
+#include <asm/byteorder.h>
+#include <asm/dma.h>
+#include <asm/irq.h>
+#include <linux/bitops.h>
+#include <linux/crc32.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/errno.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
 #include <linux/fcntl.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
 #include <linux/in.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/delay.h>
 #include <linux/init.h>
-#include <linux/ethtool.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
 #include <linux/mii.h>
-#include <linux/crc32.h>
-#include <linux/random.h>
-#include <linux/errno.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
 #include <linux/mm.h>
-#include <linux/bitops.h>
-#include <linux/dma-mapping.h>
-
-#include <asm/io.h>
-#include <asm/dma.h>
-#include <asm/byteorder.h>
-
-#ifdef CONFIG_SPARC
-#include <linux/of.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
 #include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/pci.h>
+#include <linux/random.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/uaccess.h>
+
+#ifdef CONFIG_SPARC
+#include <asm/auxio.h>
 #include <asm/idprom.h>
 #include <asm/openprom.h>
 #include <asm/oplib.h>
 #include <asm/prom.h>
-#include <asm/auxio.h>
-#endif
-#include <linux/uaccess.h>
-
-#include <asm/irq.h>
-
-#ifdef CONFIG_PCI
-#include <linux/pci.h>
 #endif
 
 #include "sunhme.h"
-- 
2.37.1

[PATCH net-next v4 06/10] net: sunhme: Switch SBUS to devres

[Sean Anderson]

The PCI half of this driver was converted in commit 914d9b2711dd ("sunhme:
switch to devres"). Do the same for the SBUS half.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
---

(no changes since v1)

 drivers/net/ethernet/sun/sunhme.c | 118 +++++++++---------------------
 1 file changed, 35 insertions(+), 83 deletions(-)

diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
index e9613db3bdee..9cd3448aca3e 100644
--- a/drivers/net/ethernet/sun/sunhme.c
+++ b/drivers/net/ethernet/sun/sunhme.c
@@ -2313,29 +2313,28 @@ static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
 	struct net_device *dev;
 	int i, qfe_slot = -1;
 	u8 addr[ETH_ALEN];
-	int err = -ENODEV;
+	int err;
 
 	sbus_dp = op->dev.parent->of_node;
 
 	/* We can match PCI devices too, do not accept those here. */
 	if (!of_node_name_eq(sbus_dp, "sbus") && !of_node_name_eq(sbus_dp, "sbi"))
-		return err;
+		return -ENODEV;
 
 	if (is_qfe) {
 		qp = quattro_sbus_find(op);
 		if (qp == NULL)
-			goto err_out;
+			return -ENODEV;
 		for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
 			if (qp->happy_meals[qfe_slot] == NULL)
 				break;
 		if (qfe_slot == 4)
-			goto err_out;
+			return -ENODEV;
 	}
 
-	err = -ENOMEM;
-	dev = alloc_etherdev(sizeof(struct happy_meal));
+	dev = devm_alloc_etherdev(&op->dev, sizeof(struct happy_meal));
 	if (!dev)
-		goto err_out;
+		return -ENOMEM;
 	SET_NETDEV_DEV(dev, &op->dev);
 
 	/* If user did not specify a MAC address specifically, use
@@ -2369,46 +2368,45 @@ static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
 
 	spin_lock_init(&hp->happy_lock);
 
-	err = -ENODEV;
 	if (qp != NULL) {
 		hp->qfe_parent = qp;
 		hp->qfe_ent = qfe_slot;
 		qp->happy_meals[qfe_slot] = dev;
 	}
 
-	hp->gregs = of_ioremap(&op->resource[0], 0,
-			       GREG_REG_SIZE, "HME Global Regs");
-	if (!hp->gregs) {
+	hp->gregs = devm_platform_ioremap_resource(op, 0);
+	if (IS_ERR(hp->gregs)) {
 		dev_err(&op->dev, "Cannot map global registers.\n");
-		goto err_out_free_netdev;
+		err = PTR_ERR(hp->gregs);
+		goto err_out_clear_quattro;
 	}
 
-	hp->etxregs = of_ioremap(&op->resource[1], 0,
-				 ETX_REG_SIZE, "HME TX Regs");
-	if (!hp->etxregs) {
+	hp->etxregs = devm_platform_ioremap_resource(op, 1);
+	if (IS_ERR(hp->etxregs)) {
 		dev_err(&op->dev, "Cannot map MAC TX registers.\n");
-		goto err_out_iounmap;
+		err = PTR_ERR(hp->etxregs);
+		goto err_out_clear_quattro;
 	}
 
-	hp->erxregs = of_ioremap(&op->resource[2], 0,
-				 ERX_REG_SIZE, "HME RX Regs");
-	if (!hp->erxregs) {
+	hp->erxregs = devm_platform_ioremap_resource(op, 2);
+	if (IS_ERR(hp->erxregs)) {
 		dev_err(&op->dev, "Cannot map MAC RX registers.\n");
-		goto err_out_iounmap;
+		err = PTR_ERR(hp->erxregs);
+		goto err_out_clear_quattro;
 	}
 
-	hp->bigmacregs = of_ioremap(&op->resource[3], 0,
-				    BMAC_REG_SIZE, "HME BIGMAC Regs");
-	if (!hp->bigmacregs) {
+	hp->bigmacregs = devm_platform_ioremap_resource(op, 3);
+	if (IS_ERR(hp->bigmacregs)) {
 		dev_err(&op->dev, "Cannot map BIGMAC registers.\n");
-		goto err_out_iounmap;
+		err = PTR_ERR(hp->bigmacregs);
+		goto err_out_clear_quattro;
 	}
 
-	hp->tcvregs = of_ioremap(&op->resource[4], 0,
-				 TCVR_REG_SIZE, "HME Tranceiver Regs");
-	if (!hp->tcvregs) {
+	hp->tcvregs = devm_platform_ioremap_resource(op, 4);
+	if (IS_ERR(hp->tcvregs)) {
 		dev_err(&op->dev, "Cannot map TCVR registers.\n");
-		goto err_out_iounmap;
+		err = PTR_ERR(hp->tcvregs);
+		goto err_out_clear_quattro;
 	}
 
 	hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
@@ -2428,13 +2426,12 @@ static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
 	hp->happy_bursts = of_getintprop_default(sbus_dp,
 						 "burst-sizes", 0x00);
 
-	hp->happy_block = dma_alloc_coherent(hp->dma_dev,
-					     PAGE_SIZE,
-					     &hp->hblock_dvma,
-					     GFP_ATOMIC);
-	err = -ENOMEM;
-	if (!hp->happy_block)
-		goto err_out_iounmap;
+	hp->happy_block = dmam_alloc_coherent(&op->dev, PAGE_SIZE,
+					      &hp->hblock_dvma, GFP_KERNEL);
+	if (!hp->happy_block) {
+		err = -ENOMEM;
+		goto err_out_clear_quattro;
+	}
 
 	/* Force check of the link first time we are brought up. */
 	hp->linkcheck = 0;
@@ -2472,10 +2469,10 @@ static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
 	happy_meal_set_initial_advertisement(hp);
 	spin_unlock_irq(&hp->happy_lock);
 
-	err = register_netdev(hp->dev);
+	err = devm_register_netdev(&op->dev, dev);
 	if (err) {
 		dev_err(&op->dev, "Cannot register net device, aborting.\n");
-		goto err_out_free_coherent;
+		goto err_out_clear_quattro;
 	}
 
 	platform_set_drvdata(op, hp);
@@ -2490,31 +2487,9 @@ static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
 
 	return 0;
 
-err_out_free_coherent:
-	dma_free_coherent(hp->dma_dev,
-			  PAGE_SIZE,
-			  hp->happy_block,
-			  hp->hblock_dvma);
-
-err_out_iounmap:
-	if (hp->gregs)
-		of_iounmap(&op->resource[0], hp->gregs, GREG_REG_SIZE);
-	if (hp->etxregs)
-		of_iounmap(&op->resource[1], hp->etxregs, ETX_REG_SIZE);
-	if (hp->erxregs)
-		of_iounmap(&op->resource[2], hp->erxregs, ERX_REG_SIZE);
-	if (hp->bigmacregs)
-		of_iounmap(&op->resource[3], hp->bigmacregs, BMAC_REG_SIZE);
-	if (hp->tcvregs)
-		of_iounmap(&op->resource[4], hp->tcvregs, TCVR_REG_SIZE);
-
+err_out_clear_quattro:
 	if (qp)
 		qp->happy_meals[qfe_slot] = NULL;
-
-err_out_free_netdev:
-	free_netdev(dev);
-
-err_out:
 	return err;
 }
 #endif
@@ -2891,28 +2866,6 @@ static int hme_sbus_probe(struct platform_device *op)
 	return happy_meal_sbus_probe_one(op, is_qfe);
 }
 
-static int hme_sbus_remove(struct platform_device *op)
-{
-	struct happy_meal *hp = platform_get_drvdata(op);
-	struct net_device *net_dev = hp->dev;
-
-	unregister_netdev(net_dev);
-
-	of_iounmap(&op->resource[0], hp->gregs, GREG_REG_SIZE);
-	of_iounmap(&op->resource[1], hp->etxregs, ETX_REG_SIZE);
-	of_iounmap(&op->resource[2], hp->erxregs, ERX_REG_SIZE);
-	of_iounmap(&op->resource[3], hp->bigmacregs, BMAC_REG_SIZE);
-	of_iounmap(&op->resource[4], hp->tcvregs, TCVR_REG_SIZE);
-	dma_free_coherent(hp->dma_dev,
-			  PAGE_SIZE,
-			  hp->happy_block,
-			  hp->hblock_dvma);
-
-	free_netdev(net_dev);
-
-	return 0;
-}
-
 static const struct of_device_id hme_sbus_match[] = {
 	{
 		.name = "SUNW,hme",
@@ -2936,7 +2889,6 @@ static struct platform_driver hme_sbus_driver = {
 		.of_match_table = hme_sbus_match,
 	},
 	.probe		= hme_sbus_probe,
-	.remove		= hme_sbus_remove,
 };
 
 static int __init happy_meal_sbus_init(void)
-- 
2.37.1

[PATCH net-next v4 07/10] net: sunhme: Consolidate mac address initialization

[Sean Anderson]

The mac address initialization is braodly the same between PCI and SBUS,
and one was clearly copied from the other. Consolidate them. We still have
to have some ifdefs because pci_(un)map_rom is only implemented for PCI,
and idprom is only implemented for SPARC.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
---

Changes in v4:
- Tweak variable order for yuletide

 drivers/net/ethernet/sun/sunhme.c | 282 ++++++++++++++----------------
 1 file changed, 134 insertions(+), 148 deletions(-)

diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
index 9cd3448aca3e..4fe67623b924 100644
--- a/drivers/net/ethernet/sun/sunhme.c
+++ b/drivers/net/ethernet/sun/sunhme.c
@@ -2304,6 +2304,133 @@ static const struct net_device_ops hme_netdev_ops = {
 	.ndo_validate_addr	= eth_validate_addr,
 };
 
+#ifdef CONFIG_PCI
+static int is_quattro_p(struct pci_dev *pdev)
+{
+	struct pci_dev *busdev = pdev->bus->self;
+	struct pci_dev *this_pdev;
+	int n_hmes;
+
+	if (!busdev || busdev->vendor != PCI_VENDOR_ID_DEC ||
+	    busdev->device != PCI_DEVICE_ID_DEC_21153)
+		return 0;
+
+	n_hmes = 0;
+	list_for_each_entry(this_pdev, &pdev->bus->devices, bus_list) {
+		if (this_pdev->vendor == PCI_VENDOR_ID_SUN &&
+		    this_pdev->device == PCI_DEVICE_ID_SUN_HAPPYMEAL)
+			n_hmes++;
+	}
+
+	if (n_hmes != 4)
+		return 0;
+
+	return 1;
+}
+
+/* Fetch MAC address from vital product data of PCI ROM. */
+static int find_eth_addr_in_vpd(void __iomem *rom_base, int len, int index, unsigned char *dev_addr)
+{
+	int this_offset;
+
+	for (this_offset = 0x20; this_offset < len; this_offset++) {
+		void __iomem *p = rom_base + this_offset;
+
+		if (readb(p + 0) != 0x90 ||
+		    readb(p + 1) != 0x00 ||
+		    readb(p + 2) != 0x09 ||
+		    readb(p + 3) != 0x4e ||
+		    readb(p + 4) != 0x41 ||
+		    readb(p + 5) != 0x06)
+			continue;
+
+		this_offset += 6;
+		p += 6;
+
+		if (index == 0) {
+			int i;
+
+			for (i = 0; i < 6; i++)
+				dev_addr[i] = readb(p + i);
+			return 1;
+		}
+		index--;
+	}
+	return 0;
+}
+
+static void __maybe_unused get_hme_mac_nonsparc(struct pci_dev *pdev,
+						unsigned char *dev_addr)
+{
+	size_t size;
+	void __iomem *p = pci_map_rom(pdev, &size);
+
+	if (p) {
+		int index = 0;
+		int found;
+
+		if (is_quattro_p(pdev))
+			index = PCI_SLOT(pdev->devfn);
+
+		found = readb(p) == 0x55 &&
+			readb(p + 1) == 0xaa &&
+			find_eth_addr_in_vpd(p, (64 * 1024), index, dev_addr);
+		pci_unmap_rom(pdev, p);
+		if (found)
+			return;
+	}
+
+	/* Sun MAC prefix then 3 random bytes. */
+	dev_addr[0] = 0x08;
+	dev_addr[1] = 0x00;
+	dev_addr[2] = 0x20;
+	get_random_bytes(&dev_addr[3], 3);
+}
+#endif /* !(CONFIG_SPARC) */
+
+static void happy_meal_addr_init(struct happy_meal *hp,
+				 struct device_node *dp, int qfe_slot)
+{
+	int i;
+
+	for (i = 0; i < 6; i++) {
+		if (macaddr[i] != 0)
+			break;
+	}
+
+	if (i < 6) { /* a mac address was given */
+		u8 addr[ETH_ALEN];
+
+		for (i = 0; i < 6; i++)
+			addr[i] = macaddr[i];
+		eth_hw_addr_set(hp->dev, addr);
+		macaddr[5]++;
+	} else {
+#ifdef CONFIG_SPARC
+		const unsigned char *addr;
+		int len;
+
+		/* If user did not specify a MAC address specifically, use
+		 * the Quattro local-mac-address property...
+		 */
+		if (qfe_slot != -1) {
+			addr = of_get_property(dp, "local-mac-address", &len);
+			if (addr && len == 6) {
+				eth_hw_addr_set(hp->dev, addr);
+				return;
+			}
+		}
+
+		eth_hw_addr_set(hp->dev, idprom->id_ethaddr);
+#else
+		u8 addr[ETH_ALEN];
+
+		get_hme_mac_nonsparc(hp->happy_dev, addr);
+		eth_hw_addr_set(hp->dev, addr);
+#endif
+	}
+}
+
 #ifdef CONFIG_SBUS
 static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
 {
@@ -2311,8 +2438,7 @@ static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
 	struct quattro *qp = NULL;
 	struct happy_meal *hp;
 	struct net_device *dev;
-	int i, qfe_slot = -1;
-	u8 addr[ETH_ALEN];
+	int qfe_slot = -1;
 	int err;
 
 	sbus_dp = op->dev.parent->of_node;
@@ -2337,34 +2463,11 @@ static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
 		return -ENOMEM;
 	SET_NETDEV_DEV(dev, &op->dev);
 
-	/* If user did not specify a MAC address specifically, use
-	 * the Quattro local-mac-address property...
-	 */
-	for (i = 0; i < 6; i++) {
-		if (macaddr[i] != 0)
-			break;
-	}
-	if (i < 6) { /* a mac address was given */
-		for (i = 0; i < 6; i++)
-			addr[i] = macaddr[i];
-		eth_hw_addr_set(dev, addr);
-		macaddr[5]++;
-	} else {
-		const unsigned char *addr;
-		int len;
-
-		addr = of_get_property(dp, "local-mac-address", &len);
-
-		if (qfe_slot != -1 && addr && len == ETH_ALEN)
-			eth_hw_addr_set(dev, addr);
-		else
-			eth_hw_addr_set(dev, idprom->id_ethaddr);
-	}
-
 	hp = netdev_priv(dev);
-
+	hp->dev = dev;
 	hp->happy_dev = op;
 	hp->dma_dev = &op->dev;
+	happy_meal_addr_init(hp, dp, qfe_slot);
 
 	spin_lock_init(&hp->happy_lock);
 
@@ -2442,7 +2545,6 @@ static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
 
 	timer_setup(&hp->happy_timer, happy_meal_timer, 0);
 
-	hp->dev = dev;
 	dev->netdev_ops = &hme_netdev_ops;
 	dev->watchdog_timeo = 5*HZ;
 	dev->ethtool_ops = &hme_ethtool_ops;
@@ -2495,104 +2597,17 @@ static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
 #endif
 
 #ifdef CONFIG_PCI
-#ifndef CONFIG_SPARC
-static int is_quattro_p(struct pci_dev *pdev)
-{
-	struct pci_dev *busdev = pdev->bus->self;
-	struct pci_dev *this_pdev;
-	int n_hmes;
-
-	if (busdev == NULL ||
-	    busdev->vendor != PCI_VENDOR_ID_DEC ||
-	    busdev->device != PCI_DEVICE_ID_DEC_21153)
-		return 0;
-
-	n_hmes = 0;
-	list_for_each_entry(this_pdev, &pdev->bus->devices, bus_list) {
-		if (this_pdev->vendor == PCI_VENDOR_ID_SUN &&
-		    this_pdev->device == PCI_DEVICE_ID_SUN_HAPPYMEAL)
-			n_hmes++;
-	}
-
-	if (n_hmes != 4)
-		return 0;
-
-	return 1;
-}
-
-/* Fetch MAC address from vital product data of PCI ROM. */
-static int find_eth_addr_in_vpd(void __iomem *rom_base, int len, int index, unsigned char *dev_addr)
-{
-	int this_offset;
-
-	for (this_offset = 0x20; this_offset < len; this_offset++) {
-		void __iomem *p = rom_base + this_offset;
-
-		if (readb(p + 0) != 0x90 ||
-		    readb(p + 1) != 0x00 ||
-		    readb(p + 2) != 0x09 ||
-		    readb(p + 3) != 0x4e ||
-		    readb(p + 4) != 0x41 ||
-		    readb(p + 5) != 0x06)
-			continue;
-
-		this_offset += 6;
-		p += 6;
-
-		if (index == 0) {
-			int i;
-
-			for (i = 0; i < 6; i++)
-				dev_addr[i] = readb(p + i);
-			return 1;
-		}
-		index--;
-	}
-	return 0;
-}
-
-static void get_hme_mac_nonsparc(struct pci_dev *pdev, unsigned char *dev_addr)
-{
-	size_t size;
-	void __iomem *p = pci_map_rom(pdev, &size);
-
-	if (p) {
-		int index = 0;
-		int found;
-
-		if (is_quattro_p(pdev))
-			index = PCI_SLOT(pdev->devfn);
-
-		found = readb(p) == 0x55 &&
-			readb(p + 1) == 0xaa &&
-			find_eth_addr_in_vpd(p, (64 * 1024), index, dev_addr);
-		pci_unmap_rom(pdev, p);
-		if (found)
-			return;
-	}
-
-	/* Sun MAC prefix then 3 random bytes. */
-	dev_addr[0] = 0x08;
-	dev_addr[1] = 0x00;
-	dev_addr[2] = 0x20;
-	get_random_bytes(&dev_addr[3], 3);
-}
-#endif /* !(CONFIG_SPARC) */
-
 static int happy_meal_pci_probe(struct pci_dev *pdev,
 				const struct pci_device_id *ent)
 {
+	struct device_node *dp = NULL;
 	struct quattro *qp = NULL;
-#ifdef CONFIG_SPARC
-	struct device_node *dp;
-#endif
 	struct happy_meal *hp;
 	struct net_device *dev;
 	void __iomem *hpreg_base;
 	struct resource *hpreg_res;
-	int i, qfe_slot = -1;
 	char prom_name[64];
-	u8 addr[ETH_ALEN];
+	int qfe_slot = -1;
 	int err = -ENODEV;
 
 	/* Now make sure pci_dev cookie is there. */
@@ -2634,7 +2649,7 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
 	SET_NETDEV_DEV(dev, &pdev->dev);
 
 	hp = netdev_priv(dev);
-
+	hp->dev = dev;
 	hp->happy_dev = pdev;
 	hp->dma_dev = &pdev->dev;
 
@@ -2670,35 +2685,7 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
 		goto err_out_clear_quattro;
 	}
 
-	for (i = 0; i < 6; i++) {
-		if (macaddr[i] != 0)
-			break;
-	}
-	if (i < 6) { /* a mac address was given */
-		for (i = 0; i < 6; i++)
-			addr[i] = macaddr[i];
-		eth_hw_addr_set(dev, addr);
-		macaddr[5]++;
-	} else {
-#ifdef CONFIG_SPARC
-		const unsigned char *addr;
-		int len;
-
-		if (qfe_slot != -1 &&
-		    (addr = of_get_property(dp, "local-mac-address", &len))
-			!= NULL &&
-		    len == 6) {
-			eth_hw_addr_set(dev, addr);
-		} else {
-			eth_hw_addr_set(dev, idprom->id_ethaddr);
-		}
-#else
-		u8 addr[ETH_ALEN];
-
-		get_hme_mac_nonsparc(pdev, addr);
-		eth_hw_addr_set(dev, addr);
-#endif
-	}
+	happy_meal_addr_init(hp, dp, qfe_slot);
 
 	/* Layout registers. */
 	hp->gregs      = (hpreg_base + 0x0000UL);
@@ -2747,7 +2734,6 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
 	timer_setup(&hp->happy_timer, happy_meal_timer, 0);
 
 	hp->irq = pdev->irq;
-	hp->dev = dev;
 	dev->netdev_ops = &hme_netdev_ops;
 	dev->watchdog_timeo = 5*HZ;
 	dev->ethtool_ops = &hme_ethtool_ops;
-- 
2.37.1

[PATCH net-next v4 08/10] net: sunhme: Clean up mac address init

[Sean Anderson]

Clean up some oddities suggested during review.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
---

(no changes since v2)

Changes in v2:
- New

 drivers/net/ethernet/sun/sunhme.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
index 4fe67623b924..b51b8930bef1 100644
--- a/drivers/net/ethernet/sun/sunhme.c
+++ b/drivers/net/ethernet/sun/sunhme.c
@@ -2348,9 +2348,7 @@ static int find_eth_addr_in_vpd(void __iomem *rom_base, int len, int index, unsi
 		p += 6;
 
 		if (index == 0) {
-			int i;
-
-			for (i = 0; i < 6; i++)
+			for (int i = 0; i < 6; i++)
 				dev_addr[i] = readb(p + i);
 			return 1;
 		}
@@ -2362,9 +2360,10 @@ static int find_eth_addr_in_vpd(void __iomem *rom_base, int len, int index, unsi
 static void __maybe_unused get_hme_mac_nonsparc(struct pci_dev *pdev,
 						unsigned char *dev_addr)
 {
+	void __iomem *p;
 	size_t size;
-	void __iomem *p = pci_map_rom(pdev, &size);
 
+	p = pci_map_rom(pdev, &size);
 	if (p) {
 		int index = 0;
 		int found;
@@ -2386,7 +2385,7 @@ static void __maybe_unused get_hme_mac_nonsparc(struct pci_dev *pdev,
 	dev_addr[2] = 0x20;
 	get_random_bytes(&dev_addr[3], 3);
 }
-#endif /* !(CONFIG_SPARC) */
+#endif
 
 static void happy_meal_addr_init(struct happy_meal *hp,
 				 struct device_node *dp, int qfe_slot)
-- 
2.37.1

[PATCH net-next v4 09/10] net: sunhme: Inline error returns

[Sean Anderson]

The err_out label used to have cleanup. Now that it just returns, inline it
everywhere.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
---

Changes in v4:
- Move uninitialized return to its own commit

Changes in v3:
- Incorperate a fix from another series into this commit

Changes in v2:
- New

 drivers/net/ethernet/sun/sunhme.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
index b51b8930bef1..bd1925f575c4 100644
--- a/drivers/net/ethernet/sun/sunhme.c
+++ b/drivers/net/ethernet/sun/sunhme.c
@@ -2622,29 +2622,25 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
 
 	err = pcim_enable_device(pdev);
 	if (err)
-		goto err_out;
+		return err;
 	pci_set_master(pdev);
 
 	if (!strcmp(prom_name, "SUNW,qfe") || !strcmp(prom_name, "qfe")) {
 		qp = quattro_pci_find(pdev);
-		if (IS_ERR(qp)) {
-			err = PTR_ERR(qp);
-			goto err_out;
-		}
+		if (IS_ERR(qp))
+			return PTR_ERR(qp);
 
 		for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
 			if (!qp->happy_meals[qfe_slot])
 				break;
 
 		if (qfe_slot == 4)
-			goto err_out;
+			return -ENODEV;
 	}
 
 	dev = devm_alloc_etherdev(&pdev->dev, sizeof(struct happy_meal));
-	if (!dev) {
-		err = -ENOMEM;
-		goto err_out;
-	}
+	if (!dev)
+		return -ENOMEM;
 	SET_NETDEV_DEV(dev, &pdev->dev);
 
 	hp = netdev_priv(dev);
@@ -2792,8 +2788,6 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
 err_out_clear_quattro:
 	if (qp != NULL)
 		qp->happy_meals[qfe_slot] = NULL;
-
-err_out:
 	return err;
 }
 
-- 
2.37.1

Re: [PATCH net-next v4 09/10] net: sunhme: Inline error returns

[Simon Horman]

On Fri, Mar 24, 2023 at 01:51:35PM -0400, Sean Anderson wrote:
> The err_out label used to have cleanup. Now that it just returns, inline it
> everywhere.
> 
> Signed-off-by: Sean Anderson <seanga2@gmail.com>

Reviewed-by: Simon Horman <simon.horman@corigine.com>

Re: [PATCH net-next v4 09/10] net: sunhme: Inline error returns

[Simon Horman]

On Fri, Mar 24, 2023 at 01:51:35PM -0400, Sean Anderson wrote:
> The err_out label used to have cleanup. Now that it just returns, inline it
> everywhere.
> 
> Signed-off-by: Sean Anderson <seanga2@gmail.com>

Reviewed-by: Simon Horman <simon.horman@corigine.com>

Sorry for the duplicate, I previously responded with
a different email address, which wasn't what I intended.

[PATCH net-next v4 10/10] net: sunhme: Consolidate common probe tasks

[Sean Anderson]

Most of the second half of the PCI/SBUS probe functions are the same.
Consolidate them into a common function.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
---

Changes in v4:
- Use correct SBUS/PCI accessors
- Rework hme_version to set the default in pci/sbus_probe and override it (if
  necessary) in common_probe

 drivers/net/ethernet/sun/sunhme.c | 157 ++++++++++++------------------
 1 file changed, 64 insertions(+), 93 deletions(-)

diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
index bd1925f575c4..ec85aef35bf9 100644
--- a/drivers/net/ethernet/sun/sunhme.c
+++ b/drivers/net/ethernet/sun/sunhme.c
@@ -2430,6 +2430,58 @@ static void happy_meal_addr_init(struct happy_meal *hp,
 	}
 }
 
+static int happy_meal_common_probe(struct happy_meal *hp,
+				   struct device_node *dp)
+{
+	struct net_device *dev = hp->dev;
+	int err;
+
+#ifdef CONFIG_SPARC
+	hp->hm_revision = of_getintprop_default(dp, "hm-rev", hp->hm_revision);
+#endif
+
+	/* Now enable the feature flags we can. */
+	if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
+		hp->happy_flags |= HFLAG_20_21;
+	else if (hp->hm_revision != 0xa0)
+		hp->happy_flags |= HFLAG_NOT_A0;
+
+	hp->happy_block = dmam_alloc_coherent(hp->dma_dev, PAGE_SIZE,
+					      &hp->hblock_dvma, GFP_KERNEL);
+	if (!hp->happy_block)
+		return -ENOMEM;
+
+	/* Force check of the link first time we are brought up. */
+	hp->linkcheck = 0;
+
+	/* Force timer state to 'asleep' with count of zero. */
+	hp->timer_state = asleep;
+	hp->timer_ticks = 0;
+
+	timer_setup(&hp->happy_timer, happy_meal_timer, 0);
+
+	dev->netdev_ops = &hme_netdev_ops;
+	dev->watchdog_timeo = 5 * HZ;
+	dev->ethtool_ops = &hme_ethtool_ops;
+
+	/* Happy Meal can do it all... */
+	dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM;
+	dev->features |= dev->hw_features | NETIF_F_RXCSUM;
+
+
+	/* Grrr, Happy Meal comes up by default not advertising
+	 * full duplex 100baseT capabilities, fix this.
+	 */
+	spin_lock_irq(&hp->happy_lock);
+	happy_meal_set_initial_advertisement(hp);
+	spin_unlock_irq(&hp->happy_lock);
+
+	err = devm_register_netdev(hp->dma_dev, dev);
+	if (err)
+		dev_err(hp->dma_dev, "Cannot register net device, aborting.\n");
+	return err;
+}
+
 #ifdef CONFIG_SBUS
 static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
 {
@@ -2511,50 +2563,18 @@ static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
 		goto err_out_clear_quattro;
 	}
 
-	hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
-	if (hp->hm_revision == 0xff)
-		hp->hm_revision = 0xa0;
-
-	/* Now enable the feature flags we can. */
-	if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
-		hp->happy_flags = HFLAG_20_21;
-	else if (hp->hm_revision != 0xa0)
-		hp->happy_flags = HFLAG_NOT_A0;
+	hp->hm_revision = 0xa0;
 
 	if (qp != NULL)
 		hp->happy_flags |= HFLAG_QUATTRO;
 
+	hp->irq = op->archdata.irqs[0];
+
 	/* Get the supported DVMA burst sizes from our Happy SBUS. */
 	hp->happy_bursts = of_getintprop_default(sbus_dp,
 						 "burst-sizes", 0x00);
 
-	hp->happy_block = dmam_alloc_coherent(&op->dev, PAGE_SIZE,
-					      &hp->hblock_dvma, GFP_KERNEL);
-	if (!hp->happy_block) {
-		err = -ENOMEM;
-		goto err_out_clear_quattro;
-	}
-
-	/* Force check of the link first time we are brought up. */
-	hp->linkcheck = 0;
-
-	/* Force timer state to 'asleep' with count of zero. */
-	hp->timer_state = asleep;
-	hp->timer_ticks = 0;
-
-	timer_setup(&hp->happy_timer, happy_meal_timer, 0);
-
-	dev->netdev_ops = &hme_netdev_ops;
-	dev->watchdog_timeo = 5*HZ;
-	dev->ethtool_ops = &hme_ethtool_ops;
-
-	/* Happy Meal can do it all... */
-	dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM;
-	dev->features |= dev->hw_features | NETIF_F_RXCSUM;
-
-	hp->irq = op->archdata.irqs[0];
-
-#if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
+#ifdef CONFIG_PCI
 	/* Hook up SBUS register/descriptor accessors. */
 	hp->read_desc32 = sbus_hme_read_desc32;
 	hp->write_txd = sbus_hme_write_txd;
@@ -2563,18 +2583,9 @@ static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
 	hp->write32 = sbus_hme_write32;
 #endif
 
-	/* Grrr, Happy Meal comes up by default not advertising
-	 * full duplex 100baseT capabilities, fix this.
-	 */
-	spin_lock_irq(&hp->happy_lock);
-	happy_meal_set_initial_advertisement(hp);
-	spin_unlock_irq(&hp->happy_lock);
-
-	err = devm_register_netdev(&op->dev, dev);
-	if (err) {
-		dev_err(&op->dev, "Cannot register net device, aborting.\n");
+	err = happy_meal_common_probe(hp, dp);
+	if (err)
 		goto err_out_clear_quattro;
-	}
 
 	platform_set_drvdata(op, hp);
 
@@ -2689,20 +2700,10 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
 	hp->bigmacregs = (hpreg_base + 0x6000UL);
 	hp->tcvregs    = (hpreg_base + 0x7000UL);
 
-#ifdef CONFIG_SPARC
-	hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
-	if (hp->hm_revision == 0xff)
+	if (IS_ENABLED(CONFIG_SPARC))
 		hp->hm_revision = 0xc0 | (pdev->revision & 0x0f);
-#else
-	/* works with this on non-sparc hosts */
-	hp->hm_revision = 0x20;
-#endif
-
-	/* Now enable the feature flags we can. */
-	if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
-		hp->happy_flags = HFLAG_20_21;
-	else if (hp->hm_revision != 0xa0 && hp->hm_revision != 0xc0)
-		hp->happy_flags = HFLAG_NOT_A0;
+	else
+		hp->hm_revision = 0x20;
 
 	if (qp != NULL)
 		hp->happy_flags |= HFLAG_QUATTRO;
@@ -2714,30 +2715,9 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
 	/* Assume PCI happy meals can handle all burst sizes. */
 	hp->happy_bursts = DMA_BURSTBITS;
 #endif
-
-	hp->happy_block = dmam_alloc_coherent(&pdev->dev, PAGE_SIZE,
-					      &hp->hblock_dvma, GFP_KERNEL);
-	if (!hp->happy_block) {
-		err = -ENOMEM;
-		goto err_out_clear_quattro;
-	}
-
-	hp->linkcheck = 0;
-	hp->timer_state = asleep;
-	hp->timer_ticks = 0;
-
-	timer_setup(&hp->happy_timer, happy_meal_timer, 0);
-
 	hp->irq = pdev->irq;
-	dev->netdev_ops = &hme_netdev_ops;
-	dev->watchdog_timeo = 5*HZ;
-	dev->ethtool_ops = &hme_ethtool_ops;
 
-	/* Happy Meal can do it all... */
-	dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM;
-	dev->features |= dev->hw_features | NETIF_F_RXCSUM;
-
-#if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
+#ifdef CONFIG_SBUS
 	/* Hook up PCI register/descriptor accessors. */
 	hp->read_desc32 = pci_hme_read_desc32;
 	hp->write_txd = pci_hme_write_txd;
@@ -2746,18 +2726,9 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
 	hp->write32 = pci_hme_write32;
 #endif
 
-	/* Grrr, Happy Meal comes up by default not advertising
-	 * full duplex 100baseT capabilities, fix this.
-	 */
-	spin_lock_irq(&hp->happy_lock);
-	happy_meal_set_initial_advertisement(hp);
-	spin_unlock_irq(&hp->happy_lock);
-
-	err = devm_register_netdev(&pdev->dev, dev);
-	if (err) {
-		dev_err(&pdev->dev, "Cannot register net device, aborting.\n");
+	err = happy_meal_common_probe(hp, dp);
+	if (err)
 		goto err_out_clear_quattro;
-	}
 
 	pci_set_drvdata(pdev, hp);
 
-- 
2.37.1

Re: [PATCH net-next v4 10/10] net: sunhme: Consolidate common probe tasks

[Simon Horman]

On Fri, Mar 24, 2023 at 01:51:36PM -0400, Sean Anderson wrote:
> Most of the second half of the PCI/SBUS probe functions are the same.
> Consolidate them into a common function.
> 
> Signed-off-by: Sean Anderson <seanga2@gmail.com>

Hi Sean,

overall this looks good.
But I (still?) have some concerns about handling hm_revision.

...

> diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
> index bd1925f575c4..ec85aef35bf9 100644
> --- a/drivers/net/ethernet/sun/sunhme.c
> +++ b/drivers/net/ethernet/sun/sunhme.c
> @@ -2430,6 +2430,58 @@ static void happy_meal_addr_init(struct happy_meal *hp,
>  	}
>  }
>  
> +static int happy_meal_common_probe(struct happy_meal *hp,
> +				   struct device_node *dp)
> +{
> +	struct net_device *dev = hp->dev;
> +	int err;
> +
> +#ifdef CONFIG_SPARC
> +	hp->hm_revision = of_getintprop_default(dp, "hm-rev", hp->hm_revision);

Previously the logic, for SPARC for PCI went something like this:

	/* in happy_meal_pci_probe() */
	hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
	if (hp->hm_revision == 0xff)
		hp->hm_revision = 0xc0 | (pdev->revision & 0x0f);

Now it goes something like this:

	/* in happy_meal_pci_probe() */
	hp->hm_revision = 0xc0 | (pdev->revision & 0x0f);
	/* in happy_meal_common_probe() */
	hp->hm_revision = of_getintprop_default(dp, "hm-rev", hp->hm_revision); 

Is this intentional?

Likewise, for sbus (which implies SPARC) the logic was something like:

	/* in happy_meal_sbus_probe_one() */
	hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
	if (hp->hm_revision == 0xff)
		 hp->hm_revision = 0xa0;

And now goes something like this:

	/* in happy_meal_pci_probe() */
	hp->hm_revision = 0xa0;
	/* in happy_meal_common_probe() */
	hp->hm_revision = of_getintprop_default(dp, "hm-rev", hp->hm_revision); 

> +#endif
> +
> +	/* Now enable the feature flags we can. */
> +	if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
> +		hp->happy_flags |= HFLAG_20_21;
> +	else if (hp->hm_revision != 0xa0)
> +		hp->happy_flags |= HFLAG_NOT_A0;
> +
> +	hp->happy_block = dmam_alloc_coherent(hp->dma_dev, PAGE_SIZE,
> +					      &hp->hblock_dvma, GFP_KERNEL);
> +	if (!hp->happy_block)
> +		return -ENOMEM;
> +
> +	/* Force check of the link first time we are brought up. */
> +	hp->linkcheck = 0;
> +
> +	/* Force timer state to 'asleep' with count of zero. */
> +	hp->timer_state = asleep;
> +	hp->timer_ticks = 0;
> +
> +	timer_setup(&hp->happy_timer, happy_meal_timer, 0);
> +
> +	dev->netdev_ops = &hme_netdev_ops;
> +	dev->watchdog_timeo = 5 * HZ;
> +	dev->ethtool_ops = &hme_ethtool_ops;
> +
> +	/* Happy Meal can do it all... */
> +	dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM;
> +	dev->features |= dev->hw_features | NETIF_F_RXCSUM;
> +
> +

nit: one blank line is enough.

> +	/* Grrr, Happy Meal comes up by default not advertising
> +	 * full duplex 100baseT capabilities, fix this.
> +	 */
> +	spin_lock_irq(&hp->happy_lock);
> +	happy_meal_set_initial_advertisement(hp);
> +	spin_unlock_irq(&hp->happy_lock);
> +
> +	err = devm_register_netdev(hp->dma_dev, dev);
> +	if (err)
> +		dev_err(hp->dma_dev, "Cannot register net device, aborting.\n");
> +	return err;
> +}
> +

...

Re: [PATCH net-next v4 10/10] net: sunhme: Consolidate common probe tasks

[Sean Anderson]

On 3/25/23 05:10, Simon Horman wrote:
> On Fri, Mar 24, 2023 at 01:51:36PM -0400, Sean Anderson wrote:
>> Most of the second half of the PCI/SBUS probe functions are the same.
>> Consolidate them into a common function.
>>
>> Signed-off-by: Sean Anderson <seanga2@gmail.com>
> 
> Hi Sean,
> 
> overall this looks good.
> But I (still?) have some concerns about handling hm_revision.
> 
> ...
> 
>> diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
>> index bd1925f575c4..ec85aef35bf9 100644
>> --- a/drivers/net/ethernet/sun/sunhme.c
>> +++ b/drivers/net/ethernet/sun/sunhme.c
>> @@ -2430,6 +2430,58 @@ static void happy_meal_addr_init(struct happy_meal *hp,
>>   	}
>>   }
>>   
>> +static int happy_meal_common_probe(struct happy_meal *hp,
>> +				   struct device_node *dp)
>> +{
>> +	struct net_device *dev = hp->dev;
>> +	int err;
>> +
>> +#ifdef CONFIG_SPARC
>> +	hp->hm_revision = of_getintprop_default(dp, "hm-rev", hp->hm_revision);
> 
> Previously the logic, for SPARC for PCI went something like this:
> 
> 	/* in happy_meal_pci_probe() */
> 	hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
> 	if (hp->hm_revision == 0xff)
> 		hp->hm_revision = 0xc0 | (pdev->revision & 0x0f);
> 
> Now it goes something like this:
> 
> 	/* in happy_meal_pci_probe() */
> 	hp->hm_revision = 0xc0 | (pdev->revision & 0x0f);
> 	/* in happy_meal_common_probe() */
> 	hp->hm_revision = of_getintprop_default(dp, "hm-rev", hp->hm_revision);
> 
> Is this intentional?
> 
> Likewise, for sbus (which implies SPARC) the logic was something like:
> 
> 	/* in happy_meal_sbus_probe_one() */
> 	hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
> 	if (hp->hm_revision == 0xff)
> 		 hp->hm_revision = 0xa0;
> 
> And now goes something like this:
> 
> 	/* in happy_meal_pci_probe() */
> 	hp->hm_revision = 0xa0;
> 	/* in happy_meal_common_probe() */
> 	hp->hm_revision = of_getintprop_default(dp, "hm-rev", hp->hm_revision);

Yes, this is intentional. Logically, they are the same; we just set up the default
before calling of_getintprop_default instead of after.

>> +#endif
>> +
>> +	/* Now enable the feature flags we can. */
>> +	if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
>> +		hp->happy_flags |= HFLAG_20_21;
>> +	else if (hp->hm_revision != 0xa0)
>> +		hp->happy_flags |= HFLAG_NOT_A0;
>> +
>> +	hp->happy_block = dmam_alloc_coherent(hp->dma_dev, PAGE_SIZE,
>> +					      &hp->hblock_dvma, GFP_KERNEL);
>> +	if (!hp->happy_block)
>> +		return -ENOMEM;
>> +
>> +	/* Force check of the link first time we are brought up. */
>> +	hp->linkcheck = 0;
>> +
>> +	/* Force timer state to 'asleep' with count of zero. */
>> +	hp->timer_state = asleep;
>> +	hp->timer_ticks = 0;
>> +
>> +	timer_setup(&hp->happy_timer, happy_meal_timer, 0);
>> +
>> +	dev->netdev_ops = &hme_netdev_ops;
>> +	dev->watchdog_timeo = 5 * HZ;
>> +	dev->ethtool_ops = &hme_ethtool_ops;
>> +
>> +	/* Happy Meal can do it all... */
>> +	dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM;
>> +	dev->features |= dev->hw_features | NETIF_F_RXCSUM;
>> +
>> +
> 
> nit: one blank line is enough.

Ah, oops.

--Sean

>> +	/* Grrr, Happy Meal comes up by default not advertising
>> +	 * full duplex 100baseT capabilities, fix this.
>> +	 */
>> +	spin_lock_irq(&hp->happy_lock);
>> +	happy_meal_set_initial_advertisement(hp);
>> +	spin_unlock_irq(&hp->happy_lock);
>> +
>> +	err = devm_register_netdev(hp->dma_dev, dev);
>> +	if (err)
>> +		dev_err(hp->dma_dev, "Cannot register net device, aborting.\n");
>> +	return err;
>> +}
>> +
> 
> ...

Re: [PATCH net-next v4 10/10] net: sunhme: Consolidate common probe tasks

[Simon Horman]

On Sat, Mar 25, 2023 at 12:06:41PM -0400, Sean Anderson wrote:
> On 3/25/23 05:10, Simon Horman wrote:
> > On Fri, Mar 24, 2023 at 01:51:36PM -0400, Sean Anderson wrote:
> > > Most of the second half of the PCI/SBUS probe functions are the same.
> > > Consolidate them into a common function.
> > > 
> > > Signed-off-by: Sean Anderson <seanga2@gmail.com>
> > 
> > Hi Sean,
> > 
> > overall this looks good.
> > But I (still?) have some concerns about handling hm_revision.
> > 
> > ...
> > 
> > > diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
> > > index bd1925f575c4..ec85aef35bf9 100644
> > > --- a/drivers/net/ethernet/sun/sunhme.c
> > > +++ b/drivers/net/ethernet/sun/sunhme.c
> > > @@ -2430,6 +2430,58 @@ static void happy_meal_addr_init(struct happy_meal *hp,
> > >   	}
> > >   }
> > > +static int happy_meal_common_probe(struct happy_meal *hp,
> > > +				   struct device_node *dp)
> > > +{
> > > +	struct net_device *dev = hp->dev;
> > > +	int err;
> > > +
> > > +#ifdef CONFIG_SPARC
> > > +	hp->hm_revision = of_getintprop_default(dp, "hm-rev", hp->hm_revision);
> > 
> > Previously the logic, for SPARC for PCI went something like this:
> > 
> > 	/* in happy_meal_pci_probe() */
> > 	hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
> > 	if (hp->hm_revision == 0xff)
> > 		hp->hm_revision = 0xc0 | (pdev->revision & 0x0f);
> > 
> > Now it goes something like this:
> > 
> > 	/* in happy_meal_pci_probe() */
> > 	hp->hm_revision = 0xc0 | (pdev->revision & 0x0f);
> > 	/* in happy_meal_common_probe() */
> > 	hp->hm_revision = of_getintprop_default(dp, "hm-rev", hp->hm_revision);
> > 
> > Is this intentional?
> > 
> > Likewise, for sbus (which implies SPARC) the logic was something like:
> > 
> > 	/* in happy_meal_sbus_probe_one() */
> > 	hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
> > 	if (hp->hm_revision == 0xff)
> > 		 hp->hm_revision = 0xa0;
> > 
> > And now goes something like this:
> > 
> > 	/* in happy_meal_pci_probe() */
> > 	hp->hm_revision = 0xa0;
> > 	/* in happy_meal_common_probe() */
> > 	hp->hm_revision = of_getintprop_default(dp, "hm-rev", hp->hm_revision);
> 
> Yes, this is intentional. Logically, they are the same; we just set up the default
> before calling of_getintprop_default instead of after.

Thanks, I see that now :)

And I have no further questions about this patch.

Reviewed-by: Simon Horman <simon.horman@corigine.com>

Re: [PATCH net-next v4 00/10] net: sunhme: Probe/IRQ cleanups

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (main)
by David S. Miller <davem@davemloft.net>:

On Fri, 24 Mar 2023 13:51:26 -0400 you wrote:
> Well, I've had these patches kicking around in my tree since last October, so I
> guess I had better get around to posting them. This series is mainly a
> cleanup/consolidation of the probe process, with some interrupt changes as well.
> Some of these changes are SBUS- (AKA SPARC-) specific, so this should really get
> some testing there as well to ensure nothing breaks. I've CC'd a few SPARC
> mailing lists in hopes that someone there can try this out. I also have an SBUS
> card I ordered by mistake if anyone has a SPARC computer but lacks this card.
> 
> [...]

Here is the summary with links:
  - [net-next,v4,01/10] net: sunhme: Fix uninitialized return code
    https://git.kernel.org/netdev/net-next/c/d61157414d0a
  - [net-next,v4,02/10] net: sunhme: Just restart autonegotiation if we can't bring the link up
    https://git.kernel.org/netdev/net-next/c/70b1b4b86227
  - [net-next,v4,03/10] net: sunhme: Remove residual polling code
    https://git.kernel.org/netdev/net-next/c/3427372d0bd8
  - [net-next,v4,04/10] net: sunhme: Unify IRQ requesting
    https://git.kernel.org/netdev/net-next/c/27b9ea8f37a6
  - [net-next,v4,05/10] net: sunhme: Alphabetize includes
    (no matching commit)
  - [net-next,v4,06/10] net: sunhme: Switch SBUS to devres
    https://git.kernel.org/netdev/net-next/c/cc216e4b44ce
  - [net-next,v4,07/10] net: sunhme: Consolidate mac address initialization
    https://git.kernel.org/netdev/net-next/c/273fb669c62c
  - [net-next,v4,08/10] net: sunhme: Clean up mac address init
    https://git.kernel.org/netdev/net-next/c/d1f088196057
  - [net-next,v4,09/10] net: sunhme: Inline error returns
    https://git.kernel.org/netdev/net-next/c/902fe6e90368
  - [net-next,v4,10/10] net: sunhme: Consolidate common probe tasks
    https://git.kernel.org/netdev/net-next/c/ecdcd0428c59

You are awesome, thank you!
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