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Commit 77d4309e authored by Li Yang's avatar Li Yang Committed by Kumar Gala
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[POWERPC] ipic: ack only for edge interrupts 

Only external interrupts in edge detect mode support ack operation.
Therefore, in most cases ack is not needed.  The patch makes ipic
ack only when it's needed.  This could boost over all system performance.
Signed-off-by: default avatarLi Yang <leoli@freescale.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
parent ea082fa9
Hide whitespace changes
Inline Side-by-side
Showing with 45 additions and 74 deletions
arch/powerpc/sysdev/ipic.c
View file @ 77d4309e
......@@ -30,11 +30,11 @@
#include "ipic.h"
static struct ipic * primary_ipic;
static struct irq_chip ipic_level_irq_chip, ipic_edge_irq_chip;
static DEFINE_SPINLOCK(ipic_lock);
static struct ipic_info ipic_info[] = {
[1] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_C,
.force = IPIC_SIFCR_H,
......@@ -42,7 +42,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 0,
},
[2] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_C,
.force = IPIC_SIFCR_H,
......@@ -50,7 +49,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 1,
},
[4] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_C,
.force = IPIC_SIFCR_H,
......@@ -58,7 +56,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 3,
},
[9] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
......@@ -66,7 +63,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 0,
},
[10] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
......@@ -74,7 +70,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 1,
},
[11] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
......@@ -82,7 +77,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 2,
},
[12] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
......@@ -90,7 +84,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 3,
},
[13] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
......@@ -98,7 +91,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 4,
},
[14] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
......@@ -106,7 +98,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 5,
},
[15] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
......@@ -114,7 +105,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 6,
},
[16] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
......@@ -122,7 +112,7 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 7,
},
[17] = {
.pend = IPIC_SEPNR,
.ack = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_A,
.force = IPIC_SEFCR,
......@@ -130,7 +120,7 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 5,
},
[18] = {
.pend = IPIC_SEPNR,
.ack = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_A,
.force = IPIC_SEFCR,
......@@ -138,7 +128,7 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 6,
},
[19] = {
.pend = IPIC_SEPNR,
.ack = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_A,
.force = IPIC_SEFCR,
......@@ -146,7 +136,7 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 7,
},
[20] = {
.pend = IPIC_SEPNR,
.ack = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_B,
.force = IPIC_SEFCR,
......@@ -154,7 +144,7 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 4,
},
[21] = {
.pend = IPIC_SEPNR,
.ack = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_B,
.force = IPIC_SEFCR,
......@@ -162,7 +152,7 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 5,
},
[22] = {
.pend = IPIC_SEPNR,
.ack = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_B,
.force = IPIC_SEFCR,
......@@ -170,7 +160,7 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 6,
},
[23] = {
.pend = IPIC_SEPNR,
.ack = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_B,
.force = IPIC_SEFCR,
......@@ -178,7 +168,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 7,
},
[32] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
......@@ -186,7 +175,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 0,
},
[33] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
......@@ -194,7 +182,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 1,
},
[34] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
......@@ -202,7 +189,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 2,
},
[35] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
......@@ -210,7 +196,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 3,
},
[36] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
......@@ -218,7 +203,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 4,
},
[37] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
......@@ -226,7 +210,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 5,
},
[38] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
......@@ -234,7 +217,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 6,
},
[39] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
......@@ -242,7 +224,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 7,
},
[42] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_B,
.force = IPIC_SIFCR_H,
......@@ -250,7 +231,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 2,
},
[44] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_B,
.force = IPIC_SIFCR_H,
......@@ -258,7 +238,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 4,
},
[45] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_B,
.force = IPIC_SIFCR_H,
......@@ -266,7 +245,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 5,
},
[46] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_B,
.force = IPIC_SIFCR_H,
......@@ -274,7 +252,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 6,
},
[47] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_B,
.force = IPIC_SIFCR_H,
......@@ -282,7 +259,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 7,
},
[48] = {
.pend = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_A,
.force = IPIC_SEFCR,
......@@ -290,7 +266,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 4,
},
[64] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_A,
.force = IPIC_SIFCR_L,
......@@ -298,7 +273,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 0,
},
[65] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_A,
.force = IPIC_SIFCR_L,
......@@ -306,7 +280,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 1,
},
[66] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_A,
.force = IPIC_SIFCR_L,
......@@ -314,7 +287,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 2,
},
[67] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_A,
.force = IPIC_SIFCR_L,
......@@ -322,7 +294,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 3,
},
[68] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_B,
.force = IPIC_SIFCR_L,
......@@ -330,7 +301,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 0,
},
[69] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_B,
.force = IPIC_SIFCR_L,
......@@ -338,7 +308,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 1,
},
[70] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_B,
.force = IPIC_SIFCR_L,
......@@ -346,7 +315,6 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 2,
},
[71] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_B,
.force = IPIC_SIFCR_L,
......@@ -354,133 +322,114 @@ static struct ipic_info ipic_info[] = {
.prio_mask = 3,
},
[72] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 8,
},
[73] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 9,
},
[74] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 10,
},
[75] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 11,
},
[76] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 12,
},
[77] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 13,
},
[78] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 14,
},
[79] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 15,
},
[80] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 16,
},
[81] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 17,
},
[82] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 18,
},
[84] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 20,
},
[85] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 21,
},
[86] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 22,
},
[87] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 23,
},
[88] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 24,
},
[89] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 25,
},
[90] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 26,
},
[91] = {
.pend = IPIC_SIPNR_L,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
......@@ -534,6 +483,10 @@ static void ipic_mask_irq(unsigned int virq)
temp &= ~(1 << (31 - ipic_info[src].bit));
ipic_write(ipic->regs, ipic_info[src].mask, temp);
/* mb() can't guarantee that masking is finished. But it does finish
* for nearly all cases. */
mb();
spin_unlock_irqrestore(&ipic_lock, flags);
}
......@@ -546,9 +499,13 @@ static void ipic_ack_irq(unsigned int virq)
spin_lock_irqsave(&ipic_lock, flags);
temp = ipic_read(ipic->regs, ipic_info[src].pend);
temp = ipic_read(ipic->regs, ipic_info[src].ack);
temp |= (1 << (31 - ipic_info[src].bit));
ipic_write(ipic->regs, ipic_info[src].pend, temp);
ipic_write(ipic->regs, ipic_info[src].ack, temp);
/* mb() can't guarantee that ack is finished. But it does finish
* for nearly all cases. */
mb();
spin_unlock_irqrestore(&ipic_lock, flags);
}
......@@ -566,9 +523,13 @@ static void ipic_mask_irq_and_ack(unsigned int virq)
temp &= ~(1 << (31 - ipic_info[src].bit));
ipic_write(ipic->regs, ipic_info[src].mask, temp);
temp = ipic_read(ipic->regs, ipic_info[src].pend);
temp = ipic_read(ipic->regs, ipic_info[src].ack);
temp |= (1 << (31 - ipic_info[src].bit));
ipic_write(ipic->regs, ipic_info[src].pend, temp);
ipic_write(ipic->regs, ipic_info[src].ack, temp);
/* mb() can't guarantee that ack is finished. But it does finish
* for nearly all cases. */
mb();
spin_unlock_irqrestore(&ipic_lock, flags);
}
......@@ -590,14 +551,22 @@ static int ipic_set_irq_type(unsigned int virq, unsigned int flow_type)
flow_type);
return -EINVAL;
}
/* ipic supports only edge mode on external interrupts */
if ((flow_type & IRQ_TYPE_EDGE_FALLING) && !ipic_info[src].ack) {
printk(KERN_ERR "ipic: edge sense not supported on internal "
"interrupts\n");
return -EINVAL;
}
desc->status &= ~(IRQ_TYPE_SENSE_MASK | IRQ_LEVEL);
desc->status |= flow_type & IRQ_TYPE_SENSE_MASK;
if (flow_type & IRQ_TYPE_LEVEL_LOW) {
desc->status |= IRQ_LEVEL;
desc->handle_irq = handle_level_irq;
desc->chip = &ipic_level_irq_chip;
} else {
desc->handle_irq = handle_edge_irq;
desc->chip = &ipic_edge_irq_chip;
}
/* only EXT IRQ senses are programmable on ipic
......@@ -622,7 +591,16 @@ static int ipic_set_irq_type(unsigned int virq, unsigned int flow_type)
return 0;
}
static struct irq_chip ipic_irq_chip = {
/* level interrupts and edge interrupts have different ack operations */
static struct irq_chip ipic_level_irq_chip = {
.typename = " IPIC ",
.unmask = ipic_unmask_irq,
.mask = ipic_mask_irq,
.mask_ack = ipic_mask_irq,
.set_type = ipic_set_irq_type,
};
static struct irq_chip ipic_edge_irq_chip = {
.typename = " IPIC ",
.unmask = ipic_unmask_irq,
.mask = ipic_mask_irq,
......@@ -641,13 +619,9 @@ static int ipic_host_map(struct irq_host *h, unsigned int virq,
irq_hw_number_t hw)
{
struct ipic *ipic = h->host_data;
struct irq_chip *chip;
/* Default chip */
chip = &ipic->hc_irq;
set_irq_chip_data(virq, ipic);
set_irq_chip_and_handler(virq, chip, handle_level_irq);
set_irq_chip_and_handler(virq, &ipic_level_irq_chip, handle_level_irq);
/* Set default irq type */
set_irq_type(virq, IRQ_TYPE_NONE);
......@@ -706,7 +680,6 @@ struct ipic * __init ipic_init(struct device_node *node, unsigned int flags)
ipic->regs = ioremap(res.start, res.end - res.start + 1);
ipic->irqhost->host_data = ipic;
ipic->hc_irq = ipic_irq_chip;
/* init hw */
ipic_write(ipic->regs, IPIC_SICNR, 0x0);
......
arch/powerpc/sysdev/ipic.h
View file @ 77d4309e
......@@ -44,13 +44,11 @@ struct ipic {
/* The remapper for this IPIC */
struct irq_host *irqhost;
/* The "linux" controller struct */
struct irq_chip hc_irq;
};
struct ipic_info {
u8 pend; /* pending register offset from base */
u8 ack; /* pending register offset from base if the irq
supports ack operation */
u8 mask; /* mask register offset from base */
u8 prio; /* priority register offset from base */
u8 force; /* force register offset from base */
......
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