Messages in this thread Patch in this message | | | From | Roy Pledge <> | Subject | [PATCH 09/11] soc/bman: Add HOTPLUG_CPU support to the BMan driver | Date | Thu, 9 Jul 2015 16:22:00 -0400 |
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From: Hai-Ying Wang <Haiying.Wang@freescale.com>
Add support for CPU hotplug for the DPAA 1.0 Buffer Manager driver
Signed-off-by: Hai-Ying Wang <Haiying.Wang@freescale.com> Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com> Signed-off-by: Roy Pledge <Roy.Pledge@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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