From: Helge Deller deller@gmx.de
[ Upstream commit 939fc856676c266c3bc347c1c1661872a3725c0f ]
Add the missing logic to allow Lasi, WAX and Dino to set the CPU affinity. This fixes IRQ migration to other CPUs when a CPU is shutdown which currently holds the IRQs for one of those chips.
Signed-off-by: Helge Deller deller@gmx.de Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/parisc/dino.c | 41 +++++++++++++++++++++++++++++++++-------- drivers/parisc/gsc.c | 31 +++++++++++++++++++++++++++++++ drivers/parisc/gsc.h | 1 + drivers/parisc/lasi.c | 7 +++---- drivers/parisc/wax.c | 7 +++---- 5 files changed, 71 insertions(+), 16 deletions(-)
diff --git a/drivers/parisc/dino.c b/drivers/parisc/dino.c index 952a92504df6..e33036281327 100644 --- a/drivers/parisc/dino.c +++ b/drivers/parisc/dino.c @@ -142,9 +142,8 @@ struct dino_device { struct pci_hba_data hba; /* 'C' inheritance - must be first */ spinlock_t dinosaur_pen; - unsigned long txn_addr; /* EIR addr to generate interrupt */ - u32 txn_data; /* EIR data assign to each dino */ u32 imr; /* IRQ's which are enabled */ + struct gsc_irq gsc_irq; int global_irq[DINO_LOCAL_IRQS]; /* map IMR bit to global irq */ #ifdef DINO_DEBUG unsigned int dino_irr0; /* save most recent IRQ line stat */ @@ -339,14 +338,43 @@ static void dino_unmask_irq(struct irq_data *d) if (tmp & DINO_MASK_IRQ(local_irq)) { DBG(KERN_WARNING "%s(): IRQ asserted! (ILR 0x%x)\n", __func__, tmp); - gsc_writel(dino_dev->txn_data, dino_dev->txn_addr); + gsc_writel(dino_dev->gsc_irq.txn_data, dino_dev->gsc_irq.txn_addr); } }
+#ifdef CONFIG_SMP +static int dino_set_affinity_irq(struct irq_data *d, const struct cpumask *dest, + bool force) +{ + struct dino_device *dino_dev = irq_data_get_irq_chip_data(d); + struct cpumask tmask; + int cpu_irq; + u32 eim; + + if (!cpumask_and(&tmask, dest, cpu_online_mask)) + return -EINVAL; + + cpu_irq = cpu_check_affinity(d, &tmask); + if (cpu_irq < 0) + return cpu_irq; + + dino_dev->gsc_irq.txn_addr = txn_affinity_addr(d->irq, cpu_irq); + eim = ((u32) dino_dev->gsc_irq.txn_addr) | dino_dev->gsc_irq.txn_data; + __raw_writel(eim, dino_dev->hba.base_addr+DINO_IAR0); + + irq_data_update_effective_affinity(d, &tmask); + + return IRQ_SET_MASK_OK; +} +#endif + static struct irq_chip dino_interrupt_type = { .name = "GSC-PCI", .irq_unmask = dino_unmask_irq, .irq_mask = dino_mask_irq, +#ifdef CONFIG_SMP + .irq_set_affinity = dino_set_affinity_irq, +#endif };
@@ -806,7 +834,6 @@ static int __init dino_common_init(struct parisc_device *dev, { int status; u32 eim; - struct gsc_irq gsc_irq; struct resource *res;
pcibios_register_hba(&dino_dev->hba); @@ -821,10 +848,8 @@ static int __init dino_common_init(struct parisc_device *dev, ** still only has 11 IRQ input lines - just map some of them ** to a different processor. */ - dev->irq = gsc_alloc_irq(&gsc_irq); - dino_dev->txn_addr = gsc_irq.txn_addr; - dino_dev->txn_data = gsc_irq.txn_data; - eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data; + dev->irq = gsc_alloc_irq(&dino_dev->gsc_irq); + eim = ((u32) dino_dev->gsc_irq.txn_addr) | dino_dev->gsc_irq.txn_data;
/* ** Dino needs a PA "IRQ" to get a processor's attention. diff --git a/drivers/parisc/gsc.c b/drivers/parisc/gsc.c index ed9371acf37e..ec175ae99873 100644 --- a/drivers/parisc/gsc.c +++ b/drivers/parisc/gsc.c @@ -135,10 +135,41 @@ static void gsc_asic_unmask_irq(struct irq_data *d) */ }
+#ifdef CONFIG_SMP +static int gsc_set_affinity_irq(struct irq_data *d, const struct cpumask *dest, + bool force) +{ + struct gsc_asic *gsc_dev = irq_data_get_irq_chip_data(d); + struct cpumask tmask; + int cpu_irq; + + if (!cpumask_and(&tmask, dest, cpu_online_mask)) + return -EINVAL; + + cpu_irq = cpu_check_affinity(d, &tmask); + if (cpu_irq < 0) + return cpu_irq; + + gsc_dev->gsc_irq.txn_addr = txn_affinity_addr(d->irq, cpu_irq); + gsc_dev->eim = ((u32) gsc_dev->gsc_irq.txn_addr) | gsc_dev->gsc_irq.txn_data; + + /* switch IRQ's for devices below LASI/WAX to other CPU */ + gsc_writel(gsc_dev->eim, gsc_dev->hpa + OFFSET_IAR); + + irq_data_update_effective_affinity(d, &tmask); + + return IRQ_SET_MASK_OK; +} +#endif + + static struct irq_chip gsc_asic_interrupt_type = { .name = "GSC-ASIC", .irq_unmask = gsc_asic_unmask_irq, .irq_mask = gsc_asic_mask_irq, +#ifdef CONFIG_SMP + .irq_set_affinity = gsc_set_affinity_irq, +#endif };
int gsc_assign_irq(struct irq_chip *type, void *data) diff --git a/drivers/parisc/gsc.h b/drivers/parisc/gsc.h index 86abad3fa215..73cbd0bb1975 100644 --- a/drivers/parisc/gsc.h +++ b/drivers/parisc/gsc.h @@ -31,6 +31,7 @@ struct gsc_asic { int version; int type; int eim; + struct gsc_irq gsc_irq; int global_irq[32]; };
diff --git a/drivers/parisc/lasi.c b/drivers/parisc/lasi.c index 4e4fd12c2112..6ef621adb63a 100644 --- a/drivers/parisc/lasi.c +++ b/drivers/parisc/lasi.c @@ -163,7 +163,6 @@ static int __init lasi_init_chip(struct parisc_device *dev) { extern void (*chassis_power_off)(void); struct gsc_asic *lasi; - struct gsc_irq gsc_irq; int ret;
lasi = kzalloc(sizeof(*lasi), GFP_KERNEL); @@ -185,7 +184,7 @@ static int __init lasi_init_chip(struct parisc_device *dev) lasi_init_irq(lasi);
/* the IRQ lasi should use */ - dev->irq = gsc_alloc_irq(&gsc_irq); + dev->irq = gsc_alloc_irq(&lasi->gsc_irq); if (dev->irq < 0) { printk(KERN_ERR "%s(): cannot get GSC irq\n", __func__); @@ -193,9 +192,9 @@ static int __init lasi_init_chip(struct parisc_device *dev) return -EBUSY; }
- lasi->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data; + lasi->eim = ((u32) lasi->gsc_irq.txn_addr) | lasi->gsc_irq.txn_data;
- ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "lasi", lasi); + ret = request_irq(lasi->gsc_irq.irq, gsc_asic_intr, 0, "lasi", lasi); if (ret < 0) { kfree(lasi); return ret; diff --git a/drivers/parisc/wax.c b/drivers/parisc/wax.c index 5b6df1516235..73a2b01f8d9c 100644 --- a/drivers/parisc/wax.c +++ b/drivers/parisc/wax.c @@ -68,7 +68,6 @@ static int __init wax_init_chip(struct parisc_device *dev) { struct gsc_asic *wax; struct parisc_device *parent; - struct gsc_irq gsc_irq; int ret;
wax = kzalloc(sizeof(*wax), GFP_KERNEL); @@ -85,7 +84,7 @@ static int __init wax_init_chip(struct parisc_device *dev) wax_init_irq(wax);
/* the IRQ wax should use */ - dev->irq = gsc_claim_irq(&gsc_irq, WAX_GSC_IRQ); + dev->irq = gsc_claim_irq(&wax->gsc_irq, WAX_GSC_IRQ); if (dev->irq < 0) { printk(KERN_ERR "%s(): cannot get GSC irq\n", __func__); @@ -93,9 +92,9 @@ static int __init wax_init_chip(struct parisc_device *dev) return -EBUSY; }
- wax->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data; + wax->eim = ((u32) wax->gsc_irq.txn_addr) | wax->gsc_irq.txn_data;
- ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "wax", wax); + ret = request_irq(wax->gsc_irq.irq, gsc_asic_intr, 0, "wax", wax); if (ret < 0) { kfree(wax); return ret;