From: Hai-Ying Wang <haiying.w...@freescale.com>
Add support for CPU hotplug for the DPAA 1.0 Buffer Manager
driver
Signed-off-by: Hai-Ying Wang <haiying.w...@freescale.com>
Signed-off-by: Emil Medve <emilian.me...@freescale.com>
Signed-off-by: Roy Pledge <roy.ple...@freescale.com>
---
drivers/soc/fsl/qbman/bman_portal.c | 40 +++++++++++++++++++++++++++++++++++
drivers/soc/fsl/qbman/dpaa_sys.h | 3 +++
2 files changed, 43 insertions(+)
diff --git a/drivers/soc/fsl/qbman/bman_portal.c
b/drivers/soc/fsl/qbman/bman_portal.c
index 62d8f64..f33d671 100644
--- a/drivers/soc/fsl/qbman/bman_portal.c
+++ b/drivers/soc/fsl/qbman/bman_portal.c
@@ -129,6 +129,42 @@ static void __cold bman_offline_cpu(unsigned int cpu)
}
}
+#ifdef CONFIG_HOTPLUG_CPU
+static void __cold bman_online_cpu(unsigned int cpu)
+{
+ struct bman_portal *p = (struct bman_portal *)affine_bportals[cpu];
+ const struct bm_portal_config *pcfg;
+
+ if (p) {
+ pcfg = bman_get_bm_portal_config(p);
+ if (pcfg)
+ irq_set_affinity(pcfg->public_cfg.irq, cpumask_of(cpu));
+ }
+}
+
+static int __cold bman_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:
+ bman_online_cpu(cpu);
+ break;
+ case CPU_DOWN_PREPARE:
+ case CPU_DOWN_PREPARE_FROZEN:
+ bman_offline_cpu(cpu);
+ }
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block bman_hotplug_cpu_notifier = {
+ .notifier_call = bman_hotplug_cpu_callback,
+};
+#endif /* CONFIG_HOTPLUG_CPU */
+
static int __cold bman_portal_probe(struct platform_device *of_dev)
{
struct device *dev = &of_dev->dev;
@@ -342,6 +378,10 @@ static int __init bman_portal_driver_register(struct
platform_driver *drv)
for_each_cpu(cpu, &offline_cpus)
bman_offline_cpu(cpu);
+#ifdef CONFIG_HOTPLUG_CPU
+ register_hotcpu_notifier(&bman_hotplug_cpu_notifier);
+#endif
+
bman_seed_bpid_range(0, bman_pool_max);
return 0;
diff --git a/drivers/soc/fsl/qbman/dpaa_sys.h b/drivers/soc/fsl/qbman/dpaa_sys.h
index 3758f96..930a4d3 100644
--- a/drivers/soc/fsl/qbman/dpaa_sys.h
+++ b/drivers/soc/fsl/qbman/dpaa_sys.h
@@ -43,6 +43,9 @@
#include <linux/vmalloc.h>
#include <linux/platform_device.h>
#include <linux/ctype.h>
+#ifdef CONFIG_HOTPLUG_CPU
+#include <linux/cpu.h>
+#endif
#include <asm/pgtable.h>
--
1.7.9.5
--
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