1 /* Copyright 2008 - 2016 Freescale Semiconductor, Inc.
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15 * GNU General Public License ("GPL") as published by the Free Software
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31 #include "bman_priv.h"
33 static struct bman_portal *affine_bportals[NR_CPUS];
34 static struct cpumask portal_cpus;
35 /* protect bman global registers and global data shared among portals */
36 static DEFINE_SPINLOCK(bman_lock);
38 static struct bman_portal *init_pcfg(struct bm_portal_config *pcfg)
40 struct bman_portal *p = bman_create_affine_portal(pcfg);
43 dev_crit(pcfg->dev, "%s: Portal failure on cpu %d\n",
48 bman_p_irqsource_add(p, BM_PIRQ_RCRI);
49 affine_bportals[pcfg->cpu] = p;
51 dev_info(pcfg->dev, "Portal initialised, cpu %d\n", pcfg->cpu);
56 static void bman_offline_cpu(unsigned int cpu)
58 struct bman_portal *p = affine_bportals[cpu];
59 const struct bm_portal_config *pcfg;
64 pcfg = bman_get_bm_portal_config(p);
68 irq_set_affinity(pcfg->irq, cpumask_of(0));
71 static void bman_online_cpu(unsigned int cpu)
73 struct bman_portal *p = affine_bportals[cpu];
74 const struct bm_portal_config *pcfg;
79 pcfg = bman_get_bm_portal_config(p);
83 irq_set_affinity(pcfg->irq, cpumask_of(cpu));
86 static int bman_hotplug_cpu_callback(struct notifier_block *nfb,
87 unsigned long action, void *hcpu)
89 unsigned int cpu = (unsigned long)hcpu;
93 case CPU_ONLINE_FROZEN:
96 case CPU_DOWN_PREPARE:
97 case CPU_DOWN_PREPARE_FROZEN:
98 bman_offline_cpu(cpu);
104 static struct notifier_block bman_hotplug_cpu_notifier = {
105 .notifier_call = bman_hotplug_cpu_callback,
108 static int bman_portal_probe(struct platform_device *pdev)
110 struct device *dev = &pdev->dev;
111 struct device_node *node = dev->of_node;
112 struct bm_portal_config *pcfg;
113 struct resource *addr_phys[2];
117 pcfg = devm_kmalloc(dev, sizeof(*pcfg), GFP_KERNEL);
123 addr_phys[0] = platform_get_resource(pdev, IORESOURCE_MEM,
126 dev_err(dev, "Can't get %s property 'reg::CE'\n",
131 addr_phys[1] = platform_get_resource(pdev, IORESOURCE_MEM,
134 dev_err(dev, "Can't get %s property 'reg::CI'\n",
141 irq = platform_get_irq(pdev, 0);
143 dev_err(dev, "Can't get %s IRQ'\n", node->full_name);
148 va = ioremap_prot(addr_phys[0]->start, resource_size(addr_phys[0]), 0);
152 pcfg->addr_virt[DPAA_PORTAL_CE] = va;
154 va = ioremap_prot(addr_phys[1]->start, resource_size(addr_phys[1]),
155 _PAGE_GUARDED | _PAGE_NO_CACHE);
159 pcfg->addr_virt[DPAA_PORTAL_CI] = va;
161 spin_lock(&bman_lock);
162 cpu = cpumask_next_zero(-1, &portal_cpus);
163 if (cpu >= nr_cpu_ids) {
164 /* unassigned portal, skip init */
165 spin_unlock(&bman_lock);
169 cpumask_set_cpu(cpu, &portal_cpus);
170 spin_unlock(&bman_lock);
173 if (!init_pcfg(pcfg))
176 /* clear irq affinity if assigned cpu is offline */
177 if (!cpu_online(cpu))
178 bman_offline_cpu(cpu);
183 iounmap(pcfg->addr_virt[DPAA_PORTAL_CE]);
185 dev_err(dev, "ioremap failed\n");
189 static const struct of_device_id bman_portal_ids[] = {
191 .compatible = "fsl,bman-portal",
195 MODULE_DEVICE_TABLE(of, bman_portal_ids);
197 static struct platform_driver bman_portal_driver = {
199 .name = KBUILD_MODNAME,
200 .of_match_table = bman_portal_ids,
202 .probe = bman_portal_probe,
205 static int __init bman_portal_driver_register(struct platform_driver *drv)
209 ret = platform_driver_register(drv);
213 register_hotcpu_notifier(&bman_hotplug_cpu_notifier);
218 module_driver(bman_portal_driver,
219 bman_portal_driver_register, platform_driver_unregister);