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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>
hifive-unleashed-5.1
Kyle Moffett 2011-12-22 10:19:12 +00:00 committed by Benjamin Herrenschmidt
parent 9ca163c860
commit 5019609fce
18 changed files with 25 additions and 38 deletions
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3
arch/powerpc/include/asm/mpic.h
View File

@ -273,7 +273,6 @@ struct mpic
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 @@ struct mpic
#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 */

3
arch/powerpc/platforms/85xx/corenet_ds.c
View File

@ -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;

2
arch/powerpc/platforms/85xx/mpc8536_ds.c
View File

@ -38,7 +38,7 @@ void __init mpc8536_ds_pic_init(void)
{
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);

4
arch/powerpc/platforms/85xx/mpc85xx_ds.c
View File

@ -72,13 +72,13 @@ void __init mpc85xx_ds_pic_init(void)
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 ");
}

2
arch/powerpc/platforms/85xx/mpc85xx_mds.c
View File

@ -436,7 +436,7 @@ static void __init mpc85xx_mds_pic_init(void)
{
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);

4
arch/powerpc/platforms/85xx/mpc85xx_rdb.c
View File

@ -49,13 +49,13 @@ void __init mpc85xx_rdb_pic_init(void)
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 ");
}

2
arch/powerpc/platforms/85xx/p1010rdb.c
View File

@ -34,7 +34,7 @@ void __init p1010_rdb_pic_init(void)
{
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);

2
arch/powerpc/platforms/85xx/p1022_ds.c
View File

@ -244,7 +244,7 @@ void __init p1022_ds_pic_init(void)
{
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);

2
arch/powerpc/platforms/85xx/p1023_rds.c
View File

@ -95,7 +95,7 @@ static void __init mpc85xx_rds_pic_init(void)
{
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);

2
arch/powerpc/platforms/85xx/xes_mpc85xx.c
View File

@ -45,7 +45,7 @@ void __init xes_mpc85xx_pic_init(void)
{
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);

2
arch/powerpc/platforms/86xx/pic.c
View File

@ -39,7 +39,7 @@ void __init mpc86xx_init_irq(void)
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);

3
arch/powerpc/platforms/embedded6xx/holly.c
View File

@ -157,8 +157,7 @@ static void __init holly_init_IRQ(void)
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);

2
arch/powerpc/platforms/embedded6xx/linkstation.c
View File

@ -83,7 +83,7 @@ static void __init linkstation_init_IRQ(void)
struct mpic *mpic;
mpic = mpic_alloc(NULL, 0, MPIC_WANTS_RESET,
4, 32, " EPIC ");
4, 0, " EPIC ");
BUG_ON(mpic == NULL);
/* PCI IRQs */

3
arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c
View File

@ -111,8 +111,7 @@ static void __init mpc7448_hpc2_init_IRQ(void)
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);

2
arch/powerpc/platforms/embedded6xx/storcenter.c
View File

@ -85,7 +85,7 @@ static void __init storcenter_init_IRQ(void)
struct mpic *mpic;
mpic = mpic_alloc(NULL, 0, MPIC_WANTS_RESET,
16, 32, " OpenPIC ");
16, 0, " OpenPIC ");
BUG_ON(mpic == NULL);
/*

4
arch/powerpc/platforms/pseries/setup.c
View File

@ -190,9 +190,7 @@ static void __init pseries_mpic_init_IRQ(void)
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 */

17
arch/powerpc/sysdev/mpic.c
View File

@ -873,7 +873,7 @@ int mpic_set_irq_type(struct irq_data *d, unsigned int flow_type)
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 @@ void mpic_set_vector(unsigned int virq, unsigned int vector)
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 @@ void mpic_set_destination(unsigned int virq, unsigned int cpuid)
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 @@ static int mpic_host_map(struct irq_host *h, unsigned int virq,
return 0;
}
if (hw >= mpic->irq_count)
if (hw >= mpic->num_sources)
return -EINVAL;
mpic_msi_reserve_hwirq(mpic, hw);
@ -1221,7 +1221,6 @@ struct mpic * __init mpic_alloc(struct device_node *node,
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 @@ struct mpic * __init mpic_alloc(struct device_node *node,
*/
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 @@ void __init mpic_init(struct mpic *mpic)
(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)) {

4
arch/powerpc/sysdev/mpic_msi.c
View File

@ -54,7 +54,7 @@ static int mpic_msi_reserve_u3_hwirqs(struct mpic *mpic)
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 mpic_msi_init_allocator(struct mpic *mpic)
{
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;