1 /* Copyright 2008 - 2016 Freescale Semiconductor, Inc. 2 * 3 * Redistribution and use in source and binary forms, with or without 4 * modification, are permitted provided that the following conditions are met: 5 * * Redistributions of source code must retain the above copyright 6 * notice, this list of conditions and the following disclaimer. 7 * * Redistributions in binary form must reproduce the above copyright 8 * notice, this list of conditions and the following disclaimer in the 9 * documentation and/or other materials provided with the distribution. 10 * * Neither the name of Freescale Semiconductor nor the 11 * names of its contributors may be used to endorse or promote products 12 * derived from this software without specific prior written permission. 13 * 14 * ALTERNATIVELY, this software may be distributed under the terms of the 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 17 * later version. 18 * 19 * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY 20 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 22 * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY 23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "bman_priv.h" 32 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); 37 38 static struct bman_portal *init_pcfg(struct bm_portal_config *pcfg) 39 { 40 struct bman_portal *p = bman_create_affine_portal(pcfg); 41 42 if (!p) { 43 dev_crit(pcfg->dev, "%s: Portal failure on cpu %d\n", 44 __func__, pcfg->cpu); 45 return NULL; 46 } 47 48 bman_p_irqsource_add(p, BM_PIRQ_RCRI); 49 affine_bportals[pcfg->cpu] = p; 50 51 dev_info(pcfg->dev, "Portal initialised, cpu %d\n", pcfg->cpu); 52 53 return p; 54 } 55 56 static int bman_offline_cpu(unsigned int cpu) 57 { 58 struct bman_portal *p = affine_bportals[cpu]; 59 const struct bm_portal_config *pcfg; 60 61 if (!p) 62 return 0; 63 64 pcfg = bman_get_bm_portal_config(p); 65 if (!pcfg) 66 return 0; 67 68 irq_set_affinity(pcfg->irq, cpumask_of(0)); 69 return 0; 70 } 71 72 static int bman_online_cpu(unsigned int cpu) 73 { 74 struct bman_portal *p = affine_bportals[cpu]; 75 const struct bm_portal_config *pcfg; 76 77 if (!p) 78 return 0; 79 80 pcfg = bman_get_bm_portal_config(p); 81 if (!pcfg) 82 return 0; 83 84 irq_set_affinity(pcfg->irq, cpumask_of(cpu)); 85 return 0; 86 } 87 88 static int bman_portal_probe(struct platform_device *pdev) 89 { 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]; 94 void __iomem *va; 95 int irq, cpu; 96 97 pcfg = devm_kmalloc(dev, sizeof(*pcfg), GFP_KERNEL); 98 if (!pcfg) 99 return -ENOMEM; 100 101 pcfg->dev = dev; 102 103 addr_phys[0] = platform_get_resource(pdev, IORESOURCE_MEM, 104 DPAA_PORTAL_CE); 105 if (!addr_phys[0]) { 106 dev_err(dev, "Can't get %pOF property 'reg::CE'\n", node); 107 return -ENXIO; 108 } 109 110 addr_phys[1] = platform_get_resource(pdev, IORESOURCE_MEM, 111 DPAA_PORTAL_CI); 112 if (!addr_phys[1]) { 113 dev_err(dev, "Can't get %pOF property 'reg::CI'\n", node); 114 return -ENXIO; 115 } 116 117 pcfg->cpu = -1; 118 119 irq = platform_get_irq(pdev, 0); 120 if (irq <= 0) { 121 dev_err(dev, "Can't get %pOF IRQ'\n", node); 122 return -ENXIO; 123 } 124 pcfg->irq = irq; 125 126 va = ioremap_prot(addr_phys[0]->start, resource_size(addr_phys[0]), 0); 127 if (!va) { 128 dev_err(dev, "ioremap::CE failed\n"); 129 goto err_ioremap1; 130 } 131 132 pcfg->addr_virt[DPAA_PORTAL_CE] = va; 133 134 va = ioremap_prot(addr_phys[1]->start, resource_size(addr_phys[1]), 135 _PAGE_GUARDED | _PAGE_NO_CACHE); 136 if (!va) { 137 dev_err(dev, "ioremap::CI failed\n"); 138 goto err_ioremap2; 139 } 140 141 pcfg->addr_virt[DPAA_PORTAL_CI] = va; 142 143 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); 148 return 0; 149 } 150 151 cpumask_set_cpu(cpu, &portal_cpus); 152 spin_unlock(&bman_lock); 153 pcfg->cpu = cpu; 154 155 if (!init_pcfg(pcfg)) { 156 dev_err(dev, "portal init failed\n"); 157 goto err_portal_init; 158 } 159 160 /* clear irq affinity if assigned cpu is offline */ 161 if (!cpu_online(cpu)) 162 bman_offline_cpu(cpu); 163 164 return 0; 165 166 err_portal_init: 167 iounmap(pcfg->addr_virt[DPAA_PORTAL_CI]); 168 err_ioremap2: 169 iounmap(pcfg->addr_virt[DPAA_PORTAL_CE]); 170 err_ioremap1: 171 return -ENXIO; 172 } 173 174 static const struct of_device_id bman_portal_ids[] = { 175 { 176 .compatible = "fsl,bman-portal", 177 }, 178 {} 179 }; 180 MODULE_DEVICE_TABLE(of, bman_portal_ids); 181 182 static struct platform_driver bman_portal_driver = { 183 .driver = { 184 .name = KBUILD_MODNAME, 185 .of_match_table = bman_portal_ids, 186 }, 187 .probe = bman_portal_probe, 188 }; 189 190 static int __init bman_portal_driver_register(struct platform_driver *drv) 191 { 192 int ret; 193 194 ret = platform_driver_register(drv); 195 if (ret < 0) 196 return ret; 197 198 ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, 199 "soc/qbman_portal:online", 200 bman_online_cpu, bman_offline_cpu); 201 if (ret < 0) { 202 pr_err("bman: failed to register hotplug callbacks.\n"); 203 platform_driver_unregister(drv); 204 return ret; 205 } 206 return 0; 207 } 208 209 module_driver(bman_portal_driver, 210 bman_portal_driver_register, platform_driver_unregister); 211