[PATCH 10/11] soc/qman: Add HOTPLUG_CPU support to the QMan driver
From: Roy Pledge <hidden>
Date: 2015-07-09 20:37:19
Also in:
linuxppc-dev, lkml
Subsystem:
freescale soc drivers, the rest · Maintainers:
Christophe Leroy, Linus Torvalds
From: Hai-Ying Wang <redacted> Add support for CPU hotplug for the DPAA 1.0 Queue Manager driver. Signed-off-by: Hai-Ying Wang <redacted> Signed-off-by: Emil Medve <redacted> Signed-off-by: Roy Pledge <redacted> --- drivers/soc/fsl/qbman/qman_portal.c | 43 +++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+)
diff --git a/drivers/soc/fsl/qbman/qman_portal.c b/drivers/soc/fsl/qbman/qman_portal.c
index 9f53f0e..ad740e5 100644
--- a/drivers/soc/fsl/qbman/qman_portal.c
+++ b/drivers/soc/fsl/qbman/qman_portal.c@@ -475,6 +475,46 @@ 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 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;
@@ -598,6 +638,9 @@ __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; }
--
1.7.9.5