1 /* Copyright 2008 - 2016 Freescale Semiconductor, Inc.
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12 * derived from this software without specific prior written permission.
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15 * GNU General Public License ("GPL") as published by the Free Software
16 * Foundation, either version 2 of that License or (at your option) any
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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 int 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));
72 static int bman_online_cpu(unsigned int cpu)
74 struct bman_portal *p = affine_bportals[cpu];
75 const struct bm_portal_config *pcfg;
80 pcfg = bman_get_bm_portal_config(p);
84 irq_set_affinity(pcfg->irq, cpumask_of(cpu));
88 static int bman_portal_probe(struct platform_device *pdev)
90 struct device *dev = &pdev->dev;
91 struct device_node *node = dev->of_node;
92 struct bm_portal_config *pcfg;
93 struct resource *addr_phys[2];
97 pcfg = devm_kmalloc(dev, sizeof(*pcfg), GFP_KERNEL);
103 addr_phys[0] = platform_get_resource(pdev, IORESOURCE_MEM,
106 dev_err(dev, "Can't get %pOF property 'reg::CE'\n", node);
110 addr_phys[1] = platform_get_resource(pdev, IORESOURCE_MEM,
113 dev_err(dev, "Can't get %pOF property 'reg::CI'\n", node);
119 irq = platform_get_irq(pdev, 0);
121 dev_err(dev, "Can't get %pOF IRQ'\n", node);
126 va = ioremap_prot(addr_phys[0]->start, resource_size(addr_phys[0]), 0);
128 dev_err(dev, "ioremap::CE failed\n");
132 pcfg->addr_virt[DPAA_PORTAL_CE] = va;
134 va = ioremap_prot(addr_phys[1]->start, resource_size(addr_phys[1]),
135 _PAGE_GUARDED | _PAGE_NO_CACHE);
137 dev_err(dev, "ioremap::CI failed\n");
141 pcfg->addr_virt[DPAA_PORTAL_CI] = va;
143 spin_lock(&bman_lock);
144 cpu = cpumask_next_zero(-1, &portal_cpus);
145 if (cpu >= nr_cpu_ids) {
146 /* unassigned portal, skip init */
147 spin_unlock(&bman_lock);
151 cpumask_set_cpu(cpu, &portal_cpus);
152 spin_unlock(&bman_lock);
155 if (!init_pcfg(pcfg)) {
156 dev_err(dev, "portal init failed\n");
157 goto err_portal_init;
160 /* clear irq affinity if assigned cpu is offline */
161 if (!cpu_online(cpu))
162 bman_offline_cpu(cpu);
167 iounmap(pcfg->addr_virt[DPAA_PORTAL_CI]);
169 iounmap(pcfg->addr_virt[DPAA_PORTAL_CE]);
174 static const struct of_device_id bman_portal_ids[] = {
176 .compatible = "fsl,bman-portal",
180 MODULE_DEVICE_TABLE(of, bman_portal_ids);
182 static struct platform_driver bman_portal_driver = {
184 .name = KBUILD_MODNAME,
185 .of_match_table = bman_portal_ids,
187 .probe = bman_portal_probe,
190 static int __init bman_portal_driver_register(struct platform_driver *drv)
194 ret = platform_driver_register(drv);
198 ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
199 "soc/qbman_portal:online",
200 bman_online_cpu, bman_offline_cpu);
202 pr_err("bman: failed to register hotplug callbacks.\n");
203 platform_driver_unregister(drv);
209 module_driver(bman_portal_driver,
210 bman_portal_driver_register, platform_driver_unregister);