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powerpc/mpic: Remove MPIC_BROKEN_FRR_NIRQS and duplicate irq_count

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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>
This commit is contained in:
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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;