powerpc/mpic: Remove MPIC_BROKEN_FRR_NIRQS and duplicate irq_count
The mpic->irq_count variable is only used as a software error-checking
limit to determine whether or not an IRQ number is valid. In board code
which does not manually specify an IRQ count to mpic_alloc(), i.e. 0, it
is automatically detected from the number of ISUs and the ISU size.
In practice, all hardware ends up with irq_count == num_sources, so all
of the runtime checks on mpic->irq_count should just check the value of
mpic->num_sources instead.
When platform hardware does not correctly report the number of IRQs,
which only happens on the MPC85xx/MPC86xx, the MPIC_BROKEN_FRR_NIRQS
flag is used to override the detected value of num_sources with the
manual irq_count parameter. Since there's no need to manually specify
the number of IRQs except in this case, the extra flag can be eliminated
and the test changed to "irq_count != 0".
Signed-off-by: Kyle Moffett <Kyle.D.Moffett@boeing.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/include/asm/mpic.h b/arch/powerpc/include/asm/mpic.h
index 67b4d98..2ebac31 100644
--- a/arch/powerpc/include/asm/mpic.h
+++ b/arch/powerpc/include/asm/mpic.h
@@ -273,7 +273,6 @@
unsigned int isu_size;
unsigned int isu_shift;
unsigned int isu_mask;
- unsigned int irq_count;
/* Number of sources */
unsigned int num_sources;
/* default senses array */
@@ -363,8 +362,6 @@
#define MPIC_ENABLE_MCK 0x00000200
/* Disable bias among target selection, spread interrupts evenly */
#define MPIC_NO_BIAS 0x00000400
-/* Ignore NIRQS as reported by FRR */
-#define MPIC_BROKEN_FRR_NIRQS 0x00000800
/* Destination only supports a single CPU at a time */
#define MPIC_SINGLE_DEST_CPU 0x00001000
/* Enable CoreInt delivery of interrupts */
diff --git a/arch/powerpc/platforms/85xx/corenet_ds.c b/arch/powerpc/platforms/85xx/corenet_ds.c
index 07e3e6c..768479b 100644
--- a/arch/powerpc/platforms/85xx/corenet_ds.c
+++ b/arch/powerpc/platforms/85xx/corenet_ds.c
@@ -36,8 +36,7 @@
void __init corenet_ds_pic_init(void)
{
struct mpic *mpic;
- unsigned int flags = MPIC_BIG_ENDIAN |
- MPIC_BROKEN_FRR_NIRQS | MPIC_SINGLE_DEST_CPU;
+ unsigned int flags = MPIC_BIG_ENDIAN | MPIC_SINGLE_DEST_CPU;
if (ppc_md.get_irq == mpic_get_coreint_irq)
flags |= MPIC_ENABLE_COREINT;
diff --git a/arch/powerpc/platforms/85xx/mpc8536_ds.c b/arch/powerpc/platforms/85xx/mpc8536_ds.c
index cf26682..d5373e0 100644
--- a/arch/powerpc/platforms/85xx/mpc8536_ds.c
+++ b/arch/powerpc/platforms/85xx/mpc8536_ds.c
@@ -38,7 +38,7 @@
{
struct mpic *mpic = mpic_alloc(NULL, 0,
MPIC_WANTS_RESET |
- MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS,
+ MPIC_BIG_ENDIAN,
0, 256, " OpenPIC ");
BUG_ON(mpic == NULL);
mpic_init(mpic);
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_ds.c b/arch/powerpc/platforms/85xx/mpc85xx_ds.c
index eefbb91..528b9a0 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx_ds.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_ds.c
@@ -72,13 +72,13 @@
if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS-CAMP")) {
mpic = mpic_alloc(NULL, 0,
- MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
+ MPIC_BIG_ENDIAN |
MPIC_SINGLE_DEST_CPU,
0, 256, " OpenPIC ");
} else {
mpic = mpic_alloc(NULL, 0,
MPIC_WANTS_RESET |
- MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
+ MPIC_BIG_ENDIAN |
MPIC_SINGLE_DEST_CPU,
0, 256, " OpenPIC ");
}
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_mds.c b/arch/powerpc/platforms/85xx/mpc85xx_mds.c
index 1d15a0c..a0cb770 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx_mds.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_mds.c
@@ -436,7 +436,7 @@
{
struct mpic *mpic = mpic_alloc(NULL, 0,
MPIC_WANTS_RESET | MPIC_BIG_ENDIAN |
- MPIC_BROKEN_FRR_NIRQS | MPIC_SINGLE_DEST_CPU,
+ MPIC_SINGLE_DEST_CPU,
0, 256, " OpenPIC ");
BUG_ON(mpic == NULL);
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_rdb.c b/arch/powerpc/platforms/85xx/mpc85xx_rdb.c
index ccf520e..a23f6f3 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx_rdb.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_rdb.c
@@ -49,13 +49,13 @@
if (of_flat_dt_is_compatible(root, "fsl,MPC85XXRDB-CAMP")) {
mpic = mpic_alloc(NULL, 0,
- MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
+ MPIC_BIG_ENDIAN |
MPIC_SINGLE_DEST_CPU,
0, 256, " OpenPIC ");
} else {
mpic = mpic_alloc(NULL, 0,
MPIC_WANTS_RESET |
- MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
+ MPIC_BIG_ENDIAN |
MPIC_SINGLE_DEST_CPU,
0, 256, " OpenPIC ");
}
diff --git a/arch/powerpc/platforms/85xx/p1010rdb.c b/arch/powerpc/platforms/85xx/p1010rdb.c
index 538bc3f..8650773 100644
--- a/arch/powerpc/platforms/85xx/p1010rdb.c
+++ b/arch/powerpc/platforms/85xx/p1010rdb.c
@@ -34,7 +34,7 @@
{
struct mpic *mpic = mpic_alloc(NULL, 0,
MPIC_WANTS_RESET | MPIC_BIG_ENDIAN |
- MPIC_BROKEN_FRR_NIRQS | MPIC_SINGLE_DEST_CPU,
+ MPIC_SINGLE_DEST_CPU,
0, 256, " OpenPIC ");
BUG_ON(mpic == NULL);
diff --git a/arch/powerpc/platforms/85xx/p1022_ds.c b/arch/powerpc/platforms/85xx/p1022_ds.c
index b0984ad..28266ab 100644
--- a/arch/powerpc/platforms/85xx/p1022_ds.c
+++ b/arch/powerpc/platforms/85xx/p1022_ds.c
@@ -244,7 +244,7 @@
{
struct mpic *mpic = mpic_alloc(NULL, 0,
MPIC_WANTS_RESET |
- MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
+ MPIC_BIG_ENDIAN |
MPIC_SINGLE_DEST_CPU,
0, 256, " OpenPIC ");
BUG_ON(mpic == NULL);
diff --git a/arch/powerpc/platforms/85xx/p1023_rds.c b/arch/powerpc/platforms/85xx/p1023_rds.c
index d951e70..b1cd6a2 100644
--- a/arch/powerpc/platforms/85xx/p1023_rds.c
+++ b/arch/powerpc/platforms/85xx/p1023_rds.c
@@ -95,7 +95,7 @@
{
struct mpic *mpic = mpic_alloc(NULL, 0,
MPIC_WANTS_RESET | MPIC_BIG_ENDIAN |
- MPIC_BROKEN_FRR_NIRQS | MPIC_SINGLE_DEST_CPU,
+ MPIC_SINGLE_DEST_CPU,
0, 256, " OpenPIC ");
BUG_ON(mpic == NULL);
diff --git a/arch/powerpc/platforms/85xx/xes_mpc85xx.c b/arch/powerpc/platforms/85xx/xes_mpc85xx.c
index 3a69f8b..1ab4e02 100644
--- a/arch/powerpc/platforms/85xx/xes_mpc85xx.c
+++ b/arch/powerpc/platforms/85xx/xes_mpc85xx.c
@@ -45,7 +45,7 @@
{
struct mpic *mpic = mpic_alloc(NULL, 0,
MPIC_WANTS_RESET |
- MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS,
+ MPIC_BIG_ENDIAN,
0, 256, " OpenPIC ");
BUG_ON(mpic == NULL);
mpic_init(mpic);
diff --git a/arch/powerpc/platforms/86xx/pic.c b/arch/powerpc/platforms/86xx/pic.c
index 52bbfa0..27959d6 100644
--- a/arch/powerpc/platforms/86xx/pic.c
+++ b/arch/powerpc/platforms/86xx/pic.c
@@ -39,7 +39,7 @@
struct mpic *mpic = mpic_alloc(NULL, 0,
MPIC_WANTS_RESET | MPIC_BIG_ENDIAN |
- MPIC_BROKEN_FRR_NIRQS | MPIC_SINGLE_DEST_CPU,
+ MPIC_SINGLE_DEST_CPU,
0, 256, " MPIC ");
BUG_ON(mpic == NULL);
diff --git a/arch/powerpc/platforms/embedded6xx/holly.c b/arch/powerpc/platforms/embedded6xx/holly.c
index 9cfcf20..d7727de 100644
--- a/arch/powerpc/platforms/embedded6xx/holly.c
+++ b/arch/powerpc/platforms/embedded6xx/holly.c
@@ -157,8 +157,7 @@
mpic = mpic_alloc(NULL, 0,
MPIC_BIG_ENDIAN | MPIC_WANTS_RESET |
MPIC_SPV_EOI | MPIC_NO_PTHROU_DIS | MPIC_REGSET_TSI108,
- 24,
- NR_IRQS-4, /* num_sources used */
+ 24, 0,
"Tsi108_PIC");
BUG_ON(mpic == NULL);
diff --git a/arch/powerpc/platforms/embedded6xx/linkstation.c b/arch/powerpc/platforms/embedded6xx/linkstation.c
index bcfad92..9479f4e 100644
--- a/arch/powerpc/platforms/embedded6xx/linkstation.c
+++ b/arch/powerpc/platforms/embedded6xx/linkstation.c
@@ -83,7 +83,7 @@
struct mpic *mpic;
mpic = mpic_alloc(NULL, 0, MPIC_WANTS_RESET,
- 4, 32, " EPIC ");
+ 4, 0, " EPIC ");
BUG_ON(mpic == NULL);
/* PCI IRQs */
diff --git a/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c b/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c
index f3350d7..90acb54 100644
--- a/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c
+++ b/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c
@@ -111,8 +111,7 @@
mpic = mpic_alloc(NULL, 0,
MPIC_BIG_ENDIAN | MPIC_WANTS_RESET |
MPIC_SPV_EOI | MPIC_NO_PTHROU_DIS | MPIC_REGSET_TSI108,
- 24,
- NR_IRQS-4, /* num_sources used */
+ 24, 0,
"Tsi108_PIC");
BUG_ON(mpic == NULL);
diff --git a/arch/powerpc/platforms/embedded6xx/storcenter.c b/arch/powerpc/platforms/embedded6xx/storcenter.c
index afa6388..451dce4 100644
--- a/arch/powerpc/platforms/embedded6xx/storcenter.c
+++ b/arch/powerpc/platforms/embedded6xx/storcenter.c
@@ -85,7 +85,7 @@
struct mpic *mpic;
mpic = mpic_alloc(NULL, 0, MPIC_WANTS_RESET,
- 16, 32, " OpenPIC ");
+ 16, 0, " OpenPIC ");
BUG_ON(mpic == NULL);
/*
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index f79f127..6d0a5df 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -190,9 +190,7 @@
BUG_ON(openpic_addr == 0);
/* Setup the openpic driver */
- mpic = mpic_alloc(pSeries_mpic_node, openpic_addr, 0,
- 16, 250, /* isu size, irq count */
- " MPIC ");
+ mpic = mpic_alloc(pSeries_mpic_node, openpic_addr, 0, 16, 0, " MPIC ");
BUG_ON(mpic == NULL);
/* Add ISUs */
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index c297a52..cbffeb7 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -873,7 +873,7 @@
DBG("mpic: set_irq_type(mpic:@%p,virq:%d,src:0x%x,type:0x%x)\n",
mpic, d->irq, src, flow_type);
- if (src >= mpic->irq_count)
+ if (src >= mpic->num_sources)
return -EINVAL;
if (flow_type == IRQ_TYPE_NONE)
@@ -909,7 +909,7 @@
DBG("mpic: set_vector(mpic:@%p,virq:%d,src:%d,vector:0x%x)\n",
mpic, virq, src, vector);
- if (src >= mpic->irq_count)
+ if (src >= mpic->num_sources)
return;
vecpri = mpic_irq_read(src, MPIC_INFO(IRQ_VECTOR_PRI));
@@ -926,7 +926,7 @@
DBG("mpic: set_destination(mpic:@%p,virq:%d,src:%d,cpuid:0x%x)\n",
mpic, virq, src, cpuid);
- if (src >= mpic->irq_count)
+ if (src >= mpic->num_sources)
return;
mpic_irq_write(src, MPIC_INFO(IRQ_DESTINATION), 1 << cpuid);
@@ -1006,7 +1006,7 @@
return 0;
}
- if (hw >= mpic->irq_count)
+ if (hw >= mpic->num_sources)
return -EINVAL;
mpic_msi_reserve_hwirq(mpic, hw);
@@ -1221,7 +1221,6 @@
mpic->hc_tm.name = name;
mpic->isu_size = isu_size;
- mpic->irq_count = irq_count;
mpic->num_sources = 0; /* so far */
if (mpic->flags & MPIC_LARGE_VECTORS)
@@ -1314,8 +1313,8 @@
*/
greg_feature = mpic_read(mpic->gregs, MPIC_INFO(GREG_FEATURE_0));
if (isu_size == 0) {
- if (mpic->flags & MPIC_BROKEN_FRR_NIRQS)
- mpic->num_sources = mpic->irq_count;
+ if (irq_count)
+ mpic->num_sources = irq_count;
else
mpic->num_sources =
((greg_feature & MPIC_GREG_FEATURE_LAST_SRC_MASK)
@@ -1450,10 +1449,6 @@
(mpic->ipi_vecs[0] + i));
}
- /* Initialize interrupt sources */
- if (mpic->irq_count == 0)
- mpic->irq_count = mpic->num_sources;
-
/* Do the HT PIC fixups on U3 broken mpic */
DBG("MPIC flags: %x\n", mpic->flags);
if ((mpic->flags & MPIC_U3_HT_IRQS) && !(mpic->flags & MPIC_SECONDARY)) {
diff --git a/arch/powerpc/sysdev/mpic_msi.c b/arch/powerpc/sysdev/mpic_msi.c
index 0f67cd7..cfe3947 100644
--- a/arch/powerpc/sysdev/mpic_msi.c
+++ b/arch/powerpc/sysdev/mpic_msi.c
@@ -54,7 +54,7 @@
for (i = 100; i < 105; i++)
msi_bitmap_reserve_hwirq(&mpic->msi_bitmap, i);
- for (i = 124; i < mpic->irq_count; i++)
+ for (i = 124; i < mpic->num_sources; i++)
msi_bitmap_reserve_hwirq(&mpic->msi_bitmap, i);
@@ -83,7 +83,7 @@
{
int rc;
- rc = msi_bitmap_alloc(&mpic->msi_bitmap, mpic->irq_count,
+ rc = msi_bitmap_alloc(&mpic->msi_bitmap, mpic->num_sources,
mpic->irqhost->of_node);
if (rc)
return rc;