固定GMAC1 网卡名为 eth3

hc

2024-11-15 a46a1ad097419aeea7350987dd95230f50d90392

 kernel/kernel/irq/manage.c
..
..
@@ -10,6 +10,7 @@
10
10
 
11
11
 #include <linux/irq.h>
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12
 #include <linux/kthread.h>
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+#include <linux/kconfig.h>
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14
 #include <linux/module.h>
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 #include <linux/random.h>
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 #include <linux/interrupt.h>
..
..
@@ -829,6 +830,50 @@
829
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 }
830
831
 EXPORT_SYMBOL(irq_set_irq_wake);
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832
 
833
+#ifdef CONFIG_IRQ_PIPELINE
834
+
835
+/**
836
+ *	irq_switch_oob - Control out-of-band setting for a registered IRQ descriptor
837
+ *	@irq:	interrupt to control
838
+ *	@on:	enable/disable pipelining
839
+ *
840
+ *	Enable/disable out-of-band handling for an IRQ. At least one
841
+ *	action must have been previously registered for such
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+ *	interrupt.
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+ *
844
+ *      The previously registered action(s) need(s) not bearing the
845
+ *      IRQF_OOB flag for the IRQ to be switched to out-of-band
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+ *      handling. This call enables switching pre-installed IRQs from
847
+ *      in-band to out-of-band handling.
848
+ *
849
+ *      NOTE: This routine affects all action handlers sharing the
850
+ *      IRQ.
851
+ */
852
+int irq_switch_oob(unsigned int irq, bool on)
853
+{
854
+	struct irq_desc *desc;
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+	unsigned long flags;
856
+	int ret = 0;
857
+
858
+	desc = irq_get_desc_lock(irq, &flags, 0);
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+	if (!desc)
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+		return -EINVAL;
861
+
862
+	if (!desc->action)
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+		ret = -EINVAL;
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+	else if (on)
865
+		irq_settings_set_oob(desc);
866
+	else
867
+		irq_settings_clr_oob(desc);
868
+
869
+	irq_put_desc_unlock(desc, flags);
870
+
871
+	return ret;
872
+}
873
+EXPORT_SYMBOL_GPL(irq_switch_oob);
874
+
875
+#endif /* CONFIG_IRQ_PIPELINE */
876
+
832
877
 /*
833
878
  * Internal function that tells the architecture code whether a
834
879
  * particular irq has been exclusively allocated or is available
..
..
@@ -845,7 +890,8 @@
845
890
 
846
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 	if (irq_settings_can_request(desc)) {
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892
 		if (!desc->action ||
848
-		    irqflags & desc->action->flags & IRQF_SHARED)
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+		    ((irqflags & desc->action->flags & IRQF_SHARED) &&
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+		     !((irqflags ^ desc->action->flags) & IRQF_OOB)))
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 			canrequest = 1;
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896
 	}
851
897
 	irq_put_desc_unlock(desc, flags);
..
..
@@ -1419,6 +1465,21 @@
1419
1465
 
1420
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 	new->irq = irq;
1421
1467
 
1468
+	ret = -EINVAL;
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+	/*
1470
+	 *  Out-of-band interrupts can be shared but not threaded.  We
1471
+	 *  silently ignore the OOB setting if interrupt pipelining is
1472
+	 *  disabled.
1473
+	 */
1474
+	if (!irqs_pipelined())
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+		new->flags &= ~IRQF_OOB;
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+	else if (new->flags & IRQF_OOB) {
1477
+		if (new->thread_fn)
1478
+			goto out_mput;
1479
+		new->flags |= IRQF_NO_THREAD;
1480
+		new->flags &= ~IRQF_ONESHOT;
1481
+	}
1482
+
1422
1483
 	/*
1423
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 	 * If the trigger type is not specified by the caller,
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 	 * then use the default for this interrupt.
..
..
@@ -1432,10 +1493,8 @@
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 	 */
1433
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 	nested = irq_settings_is_nested_thread(desc);
1434
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 	if (nested) {
1435
-		if (!new->thread_fn) {
1436
-			ret = -EINVAL;
1496
+		if (!new->thread_fn)
1437
1497
 			goto out_mput;
1438
-		}
1439
1498
 		/*
1440
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 		 * Replace the primary handler which was provided from
1441
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 		 * the driver for non nested interrupt handling by the
..
..
@@ -1519,7 +1578,7 @@
1519
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 		 * the same type (level, edge, polarity). So both flag
1520
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 		 * fields must have IRQF_SHARED set and the bits which
1521
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 		 * set the trigger type must match. Also all must
1522
-		 * agree on ONESHOT.
1581
+		 * agree on ONESHOT and OOB.
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 		 * Interrupt lines used for NMIs cannot be shared.
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 		 */
1525
1584
 		unsigned int oldtype;
..
..
@@ -1544,7 +1603,7 @@
1544
1603
 
1545
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 		if (!((old->flags & new->flags) & IRQF_SHARED) ||
1546
1605
 		    (oldtype != (new->flags & IRQF_TRIGGER_MASK)) ||
1547
-		    ((old->flags ^ new->flags) & IRQF_ONESHOT))
1606
+		    ((old->flags ^ new->flags) & (IRQF_OOB|IRQF_ONESHOT)))
1548
1607
 			goto mismatch;
1549
1608
 
1550
1609
 		/* All handlers must agree on per-cpuness */
..
..
@@ -1661,6 +1720,9 @@
1661
1720
 
1662
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 		if (new->flags & IRQF_ONESHOT)
1663
1722
 			desc->istate |= IRQS_ONESHOT;
1723
+
1724
+		if (new->flags & IRQF_OOB)
1725
+			irq_settings_set_oob(desc);
1664
1726
 
1665
1727
 		/* Exclude IRQ from balancing if requested */
1666
1728
 		if (new->flags & IRQF_NOBALANCING) {
..
..
@@ -1809,6 +1871,8 @@
1809
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 		irq_settings_clr_disable_unlazy(desc);
1810
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 		/* Only shutdown. Deactivate after synchronize_hardirq() */
1811
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 		irq_shutdown(desc);
1874
+		/* Turn off OOB handling (after shutdown). */
1875
+		irq_settings_clr_oob(desc);
1812
1876
 	}
1813
1877
 
1814
1878
 #ifdef CONFIG_SMP
..
..
@@ -1845,14 +1909,15 @@
1845
1909
 
1846
1910
 #ifdef CONFIG_DEBUG_SHIRQ
1847
1911
 	/*
1848
-	 * It's a shared IRQ -- the driver ought to be prepared for an IRQ
1849
-	 * event to happen even now it's being freed, so let's make sure that
1850
-	 * is so by doing an extra call to the handler ....
1912
+	 * It's a shared IRQ (with in-band handler) -- the driver
1913
+	 * ought to be prepared for an IRQ event to happen even now
1914
+	 * it's being freed, so let's make sure that is so by doing an
1915
+	 * extra call to the handler ....
1851
1916
 	 *
1852
1917
 	 * ( We do this after actually deregistering it, to make sure that a
1853
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 	 *   'real' IRQ doesn't run in parallel with our fake. )
1854
1919
 	 */
1855
-	if (action->flags & IRQF_SHARED) {
1920
+	if ((action->flags & (IRQF_SHARED|IRQF_OOB)) == IRQF_SHARED) {
1856
1921
 		local_irq_save(flags);
1857
1922
 		action->handler(irq, dev_id);
1858
1923
 		local_irq_restore(flags);
..
..
@@ -2473,7 +2538,7 @@
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  *	__request_percpu_irq - allocate a percpu interrupt line
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2539
  *	@irq: Interrupt line to allocate
2475
2540
  *	@handler: Function to be called when the IRQ occurs.
2476
- *	@flags: Interrupt type flags (IRQF_TIMER only)
2541
+ *	@flags: Interrupt type flags (IRQF_TIMER and/or IRQF_OOB only)
2477
2542
  *	@devname: An ascii name for the claiming device
2478
2543
  *	@dev_id: A percpu cookie passed back to the handler function
2479
2544
  *
..
..
@@ -2502,7 +2567,7 @@
2502
2567
 	    !irq_settings_is_per_cpu_devid(desc))
2503
2568
 		return -EINVAL;
2504
2569
 
2505
-	if (flags && flags != IRQF_TIMER)
2570
+	if (flags & ~(IRQF_TIMER|IRQF_OOB))
2506
2571
 		return -EINVAL;
2507
2572
 
2508
2573
 	action = kzalloc(sizeof(struct irqaction), GFP_KERNEL);