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 "qman_priv.h" 32 33 struct qman_portal *qman_dma_portal; 34 EXPORT_SYMBOL(qman_dma_portal); 35 36 /* Enable portal interupts (as opposed to polling mode) */ 37 #define CONFIG_FSL_DPA_PIRQ_SLOW 1 38 #define CONFIG_FSL_DPA_PIRQ_FAST 1 39 40 static struct cpumask portal_cpus; 41 /* protect qman global registers and global data shared among portals */ 42 static DEFINE_SPINLOCK(qman_lock); 43 44 static void portal_set_cpu(struct qm_portal_config *pcfg, int cpu) 45 { 46 #ifdef CONFIG_FSL_PAMU 47 struct device *dev = pcfg->dev; 48 int window_count = 1; 49 struct iommu_domain_geometry geom_attr; 50 struct pamu_stash_attribute stash_attr; 51 int ret; 52 53 pcfg->iommu_domain = iommu_domain_alloc(&platform_bus_type); 54 if (!pcfg->iommu_domain) { 55 dev_err(dev, "%s(): iommu_domain_alloc() failed", __func__); 56 goto no_iommu; 57 } 58 geom_attr.aperture_start = 0; 59 geom_attr.aperture_end = 60 ((dma_addr_t)1 << min(8 * sizeof(dma_addr_t), (size_t)36)) - 1; 61 geom_attr.force_aperture = true; 62 ret = iommu_domain_set_attr(pcfg->iommu_domain, DOMAIN_ATTR_GEOMETRY, 63 &geom_attr); 64 if (ret < 0) { 65 dev_err(dev, "%s(): iommu_domain_set_attr() = %d", __func__, 66 ret); 67 goto out_domain_free; 68 } 69 ret = iommu_domain_set_attr(pcfg->iommu_domain, DOMAIN_ATTR_WINDOWS, 70 &window_count); 71 if (ret < 0) { 72 dev_err(dev, "%s(): iommu_domain_set_attr() = %d", __func__, 73 ret); 74 goto out_domain_free; 75 } 76 stash_attr.cpu = cpu; 77 stash_attr.cache = PAMU_ATTR_CACHE_L1; 78 ret = iommu_domain_set_attr(pcfg->iommu_domain, 79 DOMAIN_ATTR_FSL_PAMU_STASH, 80 &stash_attr); 81 if (ret < 0) { 82 dev_err(dev, "%s(): iommu_domain_set_attr() = %d", 83 __func__, ret); 84 goto out_domain_free; 85 } 86 ret = iommu_domain_window_enable(pcfg->iommu_domain, 0, 0, 1ULL << 36, 87 IOMMU_READ | IOMMU_WRITE); 88 if (ret < 0) { 89 dev_err(dev, "%s(): iommu_domain_window_enable() = %d", 90 __func__, ret); 91 goto out_domain_free; 92 } 93 ret = iommu_attach_device(pcfg->iommu_domain, dev); 94 if (ret < 0) { 95 dev_err(dev, "%s(): iommu_device_attach() = %d", __func__, 96 ret); 97 goto out_domain_free; 98 } 99 ret = iommu_domain_set_attr(pcfg->iommu_domain, 100 DOMAIN_ATTR_FSL_PAMU_ENABLE, 101 &window_count); 102 if (ret < 0) { 103 dev_err(dev, "%s(): iommu_domain_set_attr() = %d", __func__, 104 ret); 105 goto out_detach_device; 106 } 107 108 no_iommu: 109 #endif 110 qman_set_sdest(pcfg->channel, cpu); 111 112 return; 113 114 #ifdef CONFIG_FSL_PAMU 115 out_detach_device: 116 iommu_detach_device(pcfg->iommu_domain, NULL); 117 out_domain_free: 118 iommu_domain_free(pcfg->iommu_domain); 119 pcfg->iommu_domain = NULL; 120 #endif 121 } 122 123 static struct qman_portal *init_pcfg(struct qm_portal_config *pcfg) 124 { 125 struct qman_portal *p; 126 u32 irq_sources = 0; 127 128 /* We need the same LIODN offset for all portals */ 129 qman_liodn_fixup(pcfg->channel); 130 131 pcfg->iommu_domain = NULL; 132 portal_set_cpu(pcfg, pcfg->cpu); 133 134 p = qman_create_affine_portal(pcfg, NULL); 135 if (!p) { 136 dev_crit(pcfg->dev, "%s: Portal failure on cpu %d\n", 137 __func__, pcfg->cpu); 138 return NULL; 139 } 140 141 /* Determine what should be interrupt-vs-poll driven */ 142 #ifdef CONFIG_FSL_DPA_PIRQ_SLOW 143 irq_sources |= QM_PIRQ_EQCI | QM_PIRQ_EQRI | QM_PIRQ_MRI | 144 QM_PIRQ_CSCI; 145 #endif 146 #ifdef CONFIG_FSL_DPA_PIRQ_FAST 147 irq_sources |= QM_PIRQ_DQRI; 148 #endif 149 qman_p_irqsource_add(p, irq_sources); 150 151 spin_lock(&qman_lock); 152 if (cpumask_equal(&portal_cpus, cpu_possible_mask)) { 153 /* all assigned portals are initialized now */ 154 qman_init_cgr_all(); 155 } 156 157 if (!qman_dma_portal) 158 qman_dma_portal = p; 159 160 spin_unlock(&qman_lock); 161 162 dev_info(pcfg->dev, "Portal initialised, cpu %d\n", pcfg->cpu); 163 164 return p; 165 } 166 167 static void qman_portal_update_sdest(const struct qm_portal_config *pcfg, 168 unsigned int cpu) 169 { 170 #ifdef CONFIG_FSL_PAMU /* TODO */ 171 struct pamu_stash_attribute stash_attr; 172 int ret; 173 174 if (pcfg->iommu_domain) { 175 stash_attr.cpu = cpu; 176 stash_attr.cache = PAMU_ATTR_CACHE_L1; 177 ret = iommu_domain_set_attr(pcfg->iommu_domain, 178 DOMAIN_ATTR_FSL_PAMU_STASH, &stash_attr); 179 if (ret < 0) { 180 dev_err(pcfg->dev, 181 "Failed to update pamu stash setting\n"); 182 return; 183 } 184 } 185 #endif 186 qman_set_sdest(pcfg->channel, cpu); 187 } 188 189 static int qman_offline_cpu(unsigned int cpu) 190 { 191 struct qman_portal *p; 192 const struct qm_portal_config *pcfg; 193 194 p = affine_portals[cpu]; 195 if (p) { 196 pcfg = qman_get_qm_portal_config(p); 197 if (pcfg) { 198 irq_set_affinity(pcfg->irq, cpumask_of(0)); 199 qman_portal_update_sdest(pcfg, 0); 200 } 201 } 202 return 0; 203 } 204 205 static int qman_online_cpu(unsigned int cpu) 206 { 207 struct qman_portal *p; 208 const struct qm_portal_config *pcfg; 209 210 p = affine_portals[cpu]; 211 if (p) { 212 pcfg = qman_get_qm_portal_config(p); 213 if (pcfg) { 214 irq_set_affinity(pcfg->irq, cpumask_of(cpu)); 215 qman_portal_update_sdest(pcfg, cpu); 216 } 217 } 218 return 0; 219 } 220 221 static int qman_portal_probe(struct platform_device *pdev) 222 { 223 struct device *dev = &pdev->dev; 224 struct device_node *node = dev->of_node; 225 struct qm_portal_config *pcfg; 226 struct resource *addr_phys[2]; 227 void __iomem *va; 228 int irq, cpu, err; 229 u32 val; 230 231 pcfg = devm_kmalloc(dev, sizeof(*pcfg), GFP_KERNEL); 232 if (!pcfg) 233 return -ENOMEM; 234 235 pcfg->dev = dev; 236 237 addr_phys[0] = platform_get_resource(pdev, IORESOURCE_MEM, 238 DPAA_PORTAL_CE); 239 if (!addr_phys[0]) { 240 dev_err(dev, "Can't get %s property 'reg::CE'\n", 241 node->full_name); 242 return -ENXIO; 243 } 244 245 addr_phys[1] = platform_get_resource(pdev, IORESOURCE_MEM, 246 DPAA_PORTAL_CI); 247 if (!addr_phys[1]) { 248 dev_err(dev, "Can't get %s property 'reg::CI'\n", 249 node->full_name); 250 return -ENXIO; 251 } 252 253 err = of_property_read_u32(node, "cell-index", &val); 254 if (err) { 255 dev_err(dev, "Can't get %s property 'cell-index'\n", 256 node->full_name); 257 return err; 258 } 259 pcfg->channel = val; 260 pcfg->cpu = -1; 261 irq = platform_get_irq(pdev, 0); 262 if (irq <= 0) { 263 dev_err(dev, "Can't get %s IRQ\n", node->full_name); 264 return -ENXIO; 265 } 266 pcfg->irq = irq; 267 268 va = ioremap_prot(addr_phys[0]->start, resource_size(addr_phys[0]), 0); 269 if (!va) { 270 dev_err(dev, "ioremap::CE failed\n"); 271 goto err_ioremap1; 272 } 273 274 pcfg->addr_virt[DPAA_PORTAL_CE] = va; 275 276 va = ioremap_prot(addr_phys[1]->start, resource_size(addr_phys[1]), 277 _PAGE_GUARDED | _PAGE_NO_CACHE); 278 if (!va) { 279 dev_err(dev, "ioremap::CI failed\n"); 280 goto err_ioremap2; 281 } 282 283 pcfg->addr_virt[DPAA_PORTAL_CI] = va; 284 285 pcfg->pools = qm_get_pools_sdqcr(); 286 287 spin_lock(&qman_lock); 288 cpu = cpumask_next_zero(-1, &portal_cpus); 289 if (cpu >= nr_cpu_ids) { 290 /* unassigned portal, skip init */ 291 spin_unlock(&qman_lock); 292 return 0; 293 } 294 295 cpumask_set_cpu(cpu, &portal_cpus); 296 spin_unlock(&qman_lock); 297 pcfg->cpu = cpu; 298 299 if (dma_set_mask(dev, DMA_BIT_MASK(40))) { 300 dev_err(dev, "dma_set_mask() failed\n"); 301 goto err_portal_init; 302 } 303 304 if (!init_pcfg(pcfg)) { 305 dev_err(dev, "portal init failed\n"); 306 goto err_portal_init; 307 } 308 309 /* clear irq affinity if assigned cpu is offline */ 310 if (!cpu_online(cpu)) 311 qman_offline_cpu(cpu); 312 313 return 0; 314 315 err_portal_init: 316 iounmap(pcfg->addr_virt[DPAA_PORTAL_CI]); 317 err_ioremap2: 318 iounmap(pcfg->addr_virt[DPAA_PORTAL_CE]); 319 err_ioremap1: 320 return -ENXIO; 321 } 322 323 static const struct of_device_id qman_portal_ids[] = { 324 { 325 .compatible = "fsl,qman-portal", 326 }, 327 {} 328 }; 329 MODULE_DEVICE_TABLE(of, qman_portal_ids); 330 331 static struct platform_driver qman_portal_driver = { 332 .driver = { 333 .name = KBUILD_MODNAME, 334 .of_match_table = qman_portal_ids, 335 }, 336 .probe = qman_portal_probe, 337 }; 338 339 static int __init qman_portal_driver_register(struct platform_driver *drv) 340 { 341 int ret; 342 343 ret = platform_driver_register(drv); 344 if (ret < 0) 345 return ret; 346 347 ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, 348 "soc/qman_portal:online", 349 qman_online_cpu, qman_offline_cpu); 350 if (ret < 0) { 351 pr_err("qman: failed to register hotplug callbacks.\n"); 352 platform_driver_unregister(drv); 353 return ret; 354 } 355 return 0; 356 } 357 358 module_driver(qman_portal_driver, 359 qman_portal_driver_register, platform_driver_unregister); 360