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 int irq, cpu; 95 96 pcfg = devm_kmalloc(dev, sizeof(*pcfg), GFP_KERNEL); 97 if (!pcfg) 98 return -ENOMEM; 99 100 pcfg->dev = dev; 101 102 addr_phys[0] = platform_get_resource(pdev, IORESOURCE_MEM, 103 DPAA_PORTAL_CE); 104 if (!addr_phys[0]) { 105 dev_err(dev, "Can't get %pOF property 'reg::CE'\n", node); 106 return -ENXIO; 107 } 108 109 addr_phys[1] = platform_get_resource(pdev, IORESOURCE_MEM, 110 DPAA_PORTAL_CI); 111 if (!addr_phys[1]) { 112 dev_err(dev, "Can't get %pOF property 'reg::CI'\n", node); 113 return -ENXIO; 114 } 115 116 pcfg->cpu = -1; 117 118 irq = platform_get_irq(pdev, 0); 119 if (irq <= 0) { 120 dev_err(dev, "Can't get %pOF IRQ'\n", node); 121 return -ENXIO; 122 } 123 pcfg->irq = irq; 124 125 pcfg->addr_virt_ce = memremap(addr_phys[0]->start, 126 resource_size(addr_phys[0]), 127 QBMAN_MEMREMAP_ATTR); 128 if (!pcfg->addr_virt_ce) { 129 dev_err(dev, "memremap::CE failed\n"); 130 goto err_ioremap1; 131 } 132 133 pcfg->addr_virt_ci = ioremap(addr_phys[1]->start, 134 resource_size(addr_phys[1])); 135 if (!pcfg->addr_virt_ci) { 136 dev_err(dev, "ioremap::CI failed\n"); 137 goto err_ioremap2; 138 } 139 140 spin_lock(&bman_lock); 141 cpu = cpumask_next_zero(-1, &portal_cpus); 142 if (cpu >= nr_cpu_ids) { 143 /* unassigned portal, skip init */ 144 spin_unlock(&bman_lock); 145 return 0; 146 } 147 148 cpumask_set_cpu(cpu, &portal_cpus); 149 spin_unlock(&bman_lock); 150 pcfg->cpu = cpu; 151 152 if (!init_pcfg(pcfg)) { 153 dev_err(dev, "portal init failed\n"); 154 goto err_portal_init; 155 } 156 157 /* clear irq affinity if assigned cpu is offline */ 158 if (!cpu_online(cpu)) 159 bman_offline_cpu(cpu); 160 161 return 0; 162 163 err_portal_init: 164 iounmap(pcfg->addr_virt_ci); 165 err_ioremap2: 166 memunmap(pcfg->addr_virt_ce); 167 err_ioremap1: 168 return -ENXIO; 169 } 170 171 static const struct of_device_id bman_portal_ids[] = { 172 { 173 .compatible = "fsl,bman-portal", 174 }, 175 {} 176 }; 177 MODULE_DEVICE_TABLE(of, bman_portal_ids); 178 179 static struct platform_driver bman_portal_driver = { 180 .driver = { 181 .name = KBUILD_MODNAME, 182 .of_match_table = bman_portal_ids, 183 }, 184 .probe = bman_portal_probe, 185 }; 186 187 static int __init bman_portal_driver_register(struct platform_driver *drv) 188 { 189 int ret; 190 191 ret = platform_driver_register(drv); 192 if (ret < 0) 193 return ret; 194 195 ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, 196 "soc/qbman_portal:online", 197 bman_online_cpu, bman_offline_cpu); 198 if (ret < 0) { 199 pr_err("bman: failed to register hotplug callbacks.\n"); 200 platform_driver_unregister(drv); 201 return ret; 202 } 203 return 0; 204 } 205 206 module_driver(bman_portal_driver, 207 bman_portal_driver_register, platform_driver_unregister); 208