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ralink: backport various fixes from linux-mti 

Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 39329
owl
John Crispin 2014-01-19 17:27:22 +00:00
parent a75b692557
commit a818a3cf8f
4 changed files with 269 additions and 0 deletions
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49
target/linux/ramips/patches-3.10/0508-MIPS-GIC-Fix-gic_set_affinity-infinite-loop.patch Normal file
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@ -0,0 +1,49 @@
From 553ddf4f3f20c28ab03f87ac8c3cde5edf714675 Mon Sep 17 00:00:00 2001
From: Tony Wu <tung7970@gmail.com>
Date: Fri, 21 Jun 2013 10:13:08 +0000
Subject: [PATCH 022/105] MIPS: GIC: Fix gic_set_affinity infinite loop
There is an infinite loop in gic_set_affinity. When irq_set_affinity
gets called on gic controller, it blocks forever.
Signed-off-by: Tony Wu <tung7970@gmail.com>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5537/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
(cherry picked from commit c214c03512b67e56dea3f4471705f8caae49553a)
---
arch/mips/kernel/irq-gic.c | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/arch/mips/kernel/irq-gic.c b/arch/mips/kernel/irq-gic.c
index c01b307..5b5ddb2 100644
--- a/arch/mips/kernel/irq-gic.c
+++ b/arch/mips/kernel/irq-gic.c
@@ -219,16 +219,15 @@ static int gic_set_affinity(struct irq_data *d, const struct cpumask *cpumask,
/* Assumption : cpumask refers to a single CPU */
spin_lock_irqsave(&gic_lock, flags);
- for (;;) {
- /* Re-route this IRQ */
- GIC_SH_MAP_TO_VPE_SMASK(irq, first_cpu(tmp));
- /* Update the pcpu_masks */
- for (i = 0; i < NR_CPUS; i++)
- clear_bit(irq, pcpu_masks[i].pcpu_mask);
- set_bit(irq, pcpu_masks[first_cpu(tmp)].pcpu_mask);
+ /* Re-route this IRQ */
+ GIC_SH_MAP_TO_VPE_SMASK(irq, first_cpu(tmp));
+
+ /* Update the pcpu_masks */
+ for (i = 0; i < NR_CPUS; i++)
+ clear_bit(irq, pcpu_masks[i].pcpu_mask);
+ set_bit(irq, pcpu_masks[first_cpu(tmp)].pcpu_mask);
- }
cpumask_copy(d->affinity, cpumask);
spin_unlock_irqrestore(&gic_lock, flags);
--
1.7.10.4

57
target/linux/ramips/patches-3.10/0509-MIPS-Kconfig-CMP-support-needs-to-select-SMP-as-well.patch Normal file
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From 184edf882ebb7885b49fa231a503205da94e78f0 Mon Sep 17 00:00:00 2001
From: Markos Chandras <markos.chandras@imgtec.com>
Date: Wed, 2 Oct 2013 12:40:26 -0500
Subject: [PATCH 065/105] MIPS: Kconfig: CMP support needs to select SMP as
well
The CMP code is only designed to work with SMP configurations.
Fixes multiple build problems on certain randconfigs:
In file included from arch/mips/kernel/smp-cmp.c:34:0:
arch/mips/include/asm/smp.h:28:0:
error: "raw_smp_processor_id" redefined [-Werror]
In file included from include/linux/sched.h:30:0,
from arch/mips/kernel/smp-cmp.c:22:
include/linux/smp.h:135:0: note: this is the location of the
previous definition
In file included from arch/mips/kernel/smp-cmp.c:34:0:
arch/mips/include/asm/smp.h:57:20:
error: redefinition of 'smp_send_reschedule'
In file included from include/linux/sched.h:30:0,
from arch/mips/kernel/smp-cmp.c:22:
include/linux/smp.h:179:20: note: previous
definition of 'smp_send_reschedule' was here
In file included from arch/mips/kernel/smp-cmp.c:34:0:
arch/mips/include/asm/smp.h: In function 'smp_send_reschedule':
arch/mips/include/asm/smp.h:61:8:
error: dereferencing pointer to incomplete type
[...]
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Markos Chandras <markos.chandras@imgtec.com>
Patchwork: https://patchwork.linux-mips.org/patch/5812/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
arch/mips/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index e82c066..b537fb1 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2010,6 +2010,7 @@ config MIPS_VPE_APSP_API
config MIPS_CMP
bool "MIPS CMP framework support"
depends on SYS_SUPPORTS_MIPS_CMP
+ select SMP
select SYNC_R4K
select SYS_SUPPORTS_SMP
select SYS_SUPPORTS_SCHED_SMT if SMP
--
1.7.10.4

57
target/linux/ramips/patches-3.10/0510-MIPS-Fix-SMP-core-calculations-when-using-MT-support.patch Normal file
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@ -0,0 +1,57 @@
From c4d621e75e865fa5374946515ad0c5e060b9c446 Mon Sep 17 00:00:00 2001
From: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Date: Wed, 11 Sep 2013 14:17:47 -0500
Subject: [PATCH 056/105] MIPS: Fix SMP core calculations when using MT
support.
The TCBIND register is only available if the core has MT support. It
should not be read otherwise. Secondly, the number of TCs (siblings)
are calculated differently depending on if the kernel is configured
as SMVP or SMTC.
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5822/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
(cherry picked from commit 670bac3a8c201fc1f5f92ac6b4a8b42dc8172937)
---
arch/mips/kernel/smp-cmp.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/arch/mips/kernel/smp-cmp.c b/arch/mips/kernel/smp-cmp.c
index c2e5d74..5969f1e 100644
--- a/arch/mips/kernel/smp-cmp.c
+++ b/arch/mips/kernel/smp-cmp.c
@@ -99,7 +99,9 @@ static void cmp_init_secondary(void)
c->core = (read_c0_ebase() >> 1) & 0x1ff;
#if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_MIPS_MT_SMTC)
- c->vpe_id = (read_c0_tcbind() >> TCBIND_CURVPE_SHIFT) & TCBIND_CURVPE;
+ if (cpu_has_mipsmt)
+ c->vpe_id = (read_c0_tcbind() >> TCBIND_CURVPE_SHIFT) &
+ TCBIND_CURVPE;
#endif
#ifdef CONFIG_MIPS_MT_SMTC
c->tc_id = (read_c0_tcbind() & TCBIND_CURTC) >> TCBIND_CURTC_SHIFT;
@@ -177,9 +179,16 @@ void __init cmp_smp_setup(void)
}
if (cpu_has_mipsmt) {
- unsigned int nvpe, mvpconf0 = read_c0_mvpconf0();
+ unsigned int nvpe = 1;
+#ifdef CONFIG_MIPS_MT_SMP
+ unsigned int mvpconf0 = read_c0_mvpconf0();
+
+ nvpe = ((mvpconf0 & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1;
+#elif defined(CONFIG_MIPS_MT_SMTC)
+ unsigned int mvpconf0 = read_c0_mvpconf0();
nvpe = ((mvpconf0 & MVPCONF0_PTC) >> MVPCONF0_PTC_SHIFT) + 1;
+#endif
smp_num_siblings = nvpe;
}
pr_info("Detected %i available secondary CPU(s)\n", ncpu);
--
1.7.10.4

106
target/linux/ramips/patches-3.10/0511-MIPS-GIC-Send-IPIs-using-the-GIC.patch Normal file
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@ -0,0 +1,106 @@
From 43334f8438704001deb258b6e7223699bd336c77 Mon Sep 17 00:00:00 2001
From: "Steven J. Hill" <Steven.Hill@imgtec.com>
Date: Wed, 25 Sep 2013 14:58:19 -0500
Subject: [PATCH 093/105] MIPS: GIC: Send IPIs using the GIC.
If a GIC present, then use it to send IPIs between the cores.
Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
---
arch/mips/kernel/smp-mt.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/arch/mips/kernel/smp-mt.c b/arch/mips/kernel/smp-mt.c
index 2f8c468..d057c84 100644
--- a/arch/mips/kernel/smp-mt.c
+++ b/arch/mips/kernel/smp-mt.c
@@ -71,6 +71,7 @@ static unsigned int __init smvp_vpe_init(unsigned int tc, unsigned int mvpconf0,
/* Record this as available CPU */
set_cpu_possible(tc, true);
+ set_cpu_present(tc, true);
__cpu_number_map[tc] = ++ncpu;
__cpu_logical_map[ncpu] = tc;
}
@@ -112,12 +113,35 @@ static void __init smvp_tc_init(unsigned int tc, unsigned int mvpconf0)
write_tc_c0_tchalt(TCHALT_H);
}
+static void mp_send_ipi_single(int cpu, unsigned int action)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ switch (action) {
+ case SMP_CALL_FUNCTION:
+ gic_send_ipi(plat_ipi_call_int_xlate(cpu));
+ break;
+
+ case SMP_RESCHEDULE_YOURSELF:
+ gic_send_ipi(plat_ipi_resched_int_xlate(cpu));
+ break;
+ }
+
+ local_irq_restore(flags);
+}
+
static void vsmp_send_ipi_single(int cpu, unsigned int action)
{
int i;
unsigned long flags;
int vpflags;
+ if (gic_present) {
+ mp_send_ipi_single(cpu, action);
+ return;
+ }
local_irq_save(flags);
vpflags = dvpe(); /* can't access the other CPU's registers whilst MVPE enabled */
@@ -164,6 +188,8 @@ static void __cpuinit vsmp_init_secondary(void)
static void __cpuinit vsmp_smp_finish(void)
{
+ pr_debug("SMPMT: CPU%d: vsmp_smp_finish\n", smp_processor_id());
+
/* CDFIXME: remove this? */
write_c0_compare(read_c0_count() + (8* mips_hpt_frequency/HZ));
@@ -178,6 +204,7 @@ static void __cpuinit vsmp_smp_finish(void)
static void vsmp_cpus_done(void)
{
+ pr_debug("SMPMT: CPU%d: vsmp_cpus_done\n", smp_processor_id());
}
/*
@@ -191,6 +218,8 @@ static void vsmp_cpus_done(void)
static void __cpuinit vsmp_boot_secondary(int cpu, struct task_struct *idle)
{
struct thread_info *gp = task_thread_info(idle);
+ pr_debug("SMPMT: CPU%d: vsmp_boot_secondary cpu %d\n",
+ smp_processor_id(), cpu);
dvpe();
set_c0_mvpcontrol(MVPCONTROL_VPC);
@@ -232,6 +261,7 @@ static void __init vsmp_smp_setup(void)
unsigned int mvpconf0, ntc, tc, ncpu = 0;
unsigned int nvpe;
+ pr_debug("SMPMT: CPU%d: vsmp_smp_setup\n", smp_processor_id());
#ifdef CONFIG_MIPS_MT_FPAFF
/* If we have an FPU, enroll ourselves in the FPU-full mask */
if (cpu_has_fpu)
@@ -272,6 +302,8 @@ static void __init vsmp_smp_setup(void)
static void __init vsmp_prepare_cpus(unsigned int max_cpus)
{
+ pr_debug("SMPMT: CPU%d: vsmp_prepare_cpus %d\n",
+ smp_processor_id(), max_cpus);
mips_mt_set_cpuoptions();
}
--
1.7.10.4