target/linux/brcm63xx/patches-3.8/322-MIPS-BCM63XX-allow-setting-affinity-for-IPIC.patch

   1 From a8bb19e5ba9a3a73fe6a761295b67b641a7bc9df Mon Sep 17 00:00:00 2001
   2 From: Jonas Gorski <jogo@openwrt.org>
   3 Date: Fri, 26 Apr 2013 12:06:03 +0200
   4 Subject: [PATCH 13/13] MIPS: BCM63XX: allow setting affinity for IPIC
   5
   6 Add support for setting the SMP affinity for the IPIC IRQs.
   7
   8 Signed-off-by: Jonas Gorski <jogo@openwrt.org>
   9 ---
  10  arch/mips/bcm63xx/irq.c |   27 ++++++++++++++++++++++++++-
  11  1 file changed, 26 insertions(+), 1 deletion(-)
  12
  13 --- a/arch/mips/bcm63xx/irq.c
  14 +++ b/arch/mips/bcm63xx/irq.c
  15 @@ -418,9 +418,14 @@ static void bcm63xx_internal_irq_mask(st
  16  static void bcm63xx_internal_irq_unmask(struct irq_data *d)
  17  {
  18         unsigned long flags;
  19 +       const struct cpumask *dest = cpu_online_mask;
  20
  21         spin_lock_irqsave(&ipic_lock, flags);
  22 -       internal_irq_unmask(d->irq - IRQ_INTERNAL_BASE, cpu_online_mask);
  23 +#ifdef CONFIG_SMP
  24 +       if (irqd_affinity_was_set(d))
  25 +               dest = d->affinity;
  26 +#endif
  27 +       internal_irq_unmask(d->irq - IRQ_INTERNAL_BASE, dest);
  28         spin_unlock_irqrestore(&ipic_lock, flags);
  29  }
  30
  31 @@ -596,10 +601,30 @@ static int bcm63xx_external_irq_set_type
  32         return IRQ_SET_MASK_OK_NOCOPY;
  33  }
  34
  35 +#ifdef CONFIG_SMP
  36 +static int bcm63xx_internal_set_affinity(struct irq_data *data,
  37 +                                        const struct cpumask *dest,
  38 +                                        bool force)
  39 +{
  40 +       unsigned int irq = data->irq - IRQ_INTERNAL_BASE;
  41 +       unsigned long flags;
  42 +
  43 +       spin_lock_irqsave(&ipic_lock, flags);
  44 +       if (!irqd_irq_disabled(data))
  45 +               internal_irq_unmask(irq, dest);
  46 +       spin_unlock_irqrestore(&ipic_lock, flags);
  47 +
  48 +       return 0;
  49 +}
  50 +#endif
  51 +
  52  static struct irq_chip bcm63xx_internal_irq_chip = {
  53         .name           = "bcm63xx_ipic",
  54         .irq_mask       = bcm63xx_internal_irq_mask,
  55         .irq_unmask     = bcm63xx_internal_irq_unmask,
  56 +#ifdef CONFIG_SMP
  57 +       .irq_set_affinity = bcm63xx_internal_set_affinity,
  58 +#endif
  59  };
  60
  61  static struct irq_chip bcm63xx_external_irq_chip = {