From: Hai-Ying Wang <Haiying.Wang@xxxxxxxxxxxxx>
Change-Id: Ica4d1b2b0fd3c3ae5e043663febd9f4cb7c762cf
Signed-off-by: Hai-Ying Wang <Haiying.Wang@xxxxxxxxxxxxx>
---
drivers/staging/fsl_qbman/qman_driver.c | 45 +++++++++++++++++++++++++++++++++
1 file changed, 45 insertions(+)
diff --git a/drivers/staging/fsl_qbman/qman_driver.c b/drivers/staging/fsl_qbman/qman_driver.c
index 5ca6221..7cd23bc 100644
--- a/drivers/staging/fsl_qbman/qman_driver.c
+++ b/drivers/staging/fsl_qbman/qman_driver.c
@@ -30,6 +30,9 @@
*/
#include "qman_private.h"
+#ifdef CONFIG_HOTPLUG_CPU
+#include <linux/cpu.h>
+#endif
/* Global variable containing revision id (even on non-control plane systems
* where CCSR isn't available) */
@@ -381,6 +384,45 @@ static void qman_offline_cpu(unsigned int cpu)
}
}
+#ifdef CONFIG_HOTPLUG_CPU
+static void qman_online_cpu(unsigned int cpu)
+{
+ struct qman_portal *p;
+ const struct qm_portal_config *pcfg;
+ p = (struct qman_portal *)affine_portals[cpu];
+ if (p) {
+ pcfg = qman_get_qm_portal_config(p);
+ if (pcfg) {
+ irq_set_affinity(pcfg->public_cfg.irq, cpumask_of(cpu));
+ qman_portal_update_sdest(pcfg, cpu);
+ }
+ }
+}
+
+static int __cpuinit qman_hotplug_cpu_callback(struct notifier_block *nfb,
+ unsigned long action, void *hcpu)
+{
+ unsigned int cpu = (unsigned long)hcpu;
+
+ switch (action) {
+ case CPU_ONLINE:
+ case CPU_ONLINE_FROZEN:
+ qman_online_cpu(cpu);
+ break;
+ case CPU_DOWN_PREPARE:
+ case CPU_DOWN_PREPARE_FROZEN:
+ qman_offline_cpu(cpu);
+ default:
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block qman_hotplug_cpu_notifier = {
+ .notifier_call = qman_hotplug_cpu_callback,
+};
+#endif /* CONFIG_HOTPLUG_CPU */
+
__init int qman_init(void)
{
struct cpumask slave_cpus;
@@ -499,5 +541,8 @@ __init int qman_init(void)
cpumask_andnot(&offline_cpus, cpu_possible_mask, cpu_online_mask);
for_each_cpu(cpu, &offline_cpus)
qman_offline_cpu(cpu);
+#ifdef CONFIG_HOTPLUG_CPU
+ register_hotcpu_notifier(&qman_hotplug_cpu_notifier);
+#endif
return 0;
}
--
2.2.2
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