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 static int __qman_portals_probed; 42 /* protect qman global registers and global data shared among portals */ 43 static DEFINE_SPINLOCK(qman_lock); 44 45 static void portal_set_cpu(struct qm_portal_config *pcfg, int cpu) 46 { 47 #ifdef CONFIG_FSL_PAMU 48 struct device *dev = pcfg->dev; 49 int ret; 50 51 pcfg->iommu_domain = iommu_domain_alloc(&platform_bus_type); 52 if (!pcfg->iommu_domain) { 53 dev_err(dev, "%s(): iommu_domain_alloc() failed", __func__); 54 goto no_iommu; 55 } 56 ret = fsl_pamu_configure_l1_stash(pcfg->iommu_domain, cpu); 57 if (ret < 0) { 58 dev_err(dev, "%s(): fsl_pamu_configure_l1_stash() = %d", 59 __func__, ret); 60 goto out_domain_free; 61 } 62 ret = iommu_attach_device(pcfg->iommu_domain, dev); 63 if (ret < 0) { 64 dev_err(dev, "%s(): iommu_device_attach() = %d", __func__, 65 ret); 66 goto out_domain_free; 67 } 68 69 no_iommu: 70 #endif 71 qman_set_sdest(pcfg->channel, cpu); 72 73 return; 74 75 #ifdef CONFIG_FSL_PAMU 76 out_domain_free: 77 iommu_domain_free(pcfg->iommu_domain); 78 pcfg->iommu_domain = NULL; 79 #endif 80 } 81 82 static struct qman_portal *init_pcfg(struct qm_portal_config *pcfg) 83 { 84 struct qman_portal *p; 85 u32 irq_sources = 0; 86 87 /* We need the same LIODN offset for all portals */ 88 qman_liodn_fixup(pcfg->channel); 89 90 pcfg->iommu_domain = NULL; 91 portal_set_cpu(pcfg, pcfg->cpu); 92 93 p = qman_create_affine_portal(pcfg, NULL); 94 if (!p) { 95 dev_crit(pcfg->dev, "%s: Portal failure on cpu %d\n", 96 __func__, pcfg->cpu); 97 return NULL; 98 } 99 100 /* Determine what should be interrupt-vs-poll driven */ 101 #ifdef CONFIG_FSL_DPA_PIRQ_SLOW 102 irq_sources |= QM_PIRQ_EQCI | QM_PIRQ_EQRI | QM_PIRQ_MRI | 103 QM_PIRQ_CSCI; 104 #endif 105 #ifdef CONFIG_FSL_DPA_PIRQ_FAST 106 irq_sources |= QM_PIRQ_DQRI; 107 #endif 108 qman_p_irqsource_add(p, irq_sources); 109 110 spin_lock(&qman_lock); 111 if (cpumask_equal(&portal_cpus, cpu_possible_mask)) { 112 /* all assigned portals are initialized now */ 113 qman_init_cgr_all(); 114 } 115 116 if (!qman_dma_portal) 117 qman_dma_portal = p; 118 119 spin_unlock(&qman_lock); 120 121 dev_info(pcfg->dev, "Portal initialised, cpu %d\n", pcfg->cpu); 122 123 return p; 124 } 125 126 static void qman_portal_update_sdest(const struct qm_portal_config *pcfg, 127 unsigned int cpu) 128 { 129 #ifdef CONFIG_FSL_PAMU /* TODO */ 130 if (pcfg->iommu_domain) { 131 if (fsl_pamu_configure_l1_stash(pcfg->iommu_domain, cpu) < 0) { 132 dev_err(pcfg->dev, 133 "Failed to update pamu stash setting\n"); 134 return; 135 } 136 } 137 #endif 138 qman_set_sdest(pcfg->channel, cpu); 139 } 140 141 static int qman_offline_cpu(unsigned int cpu) 142 { 143 struct qman_portal *p; 144 const struct qm_portal_config *pcfg; 145 146 p = affine_portals[cpu]; 147 if (p) { 148 pcfg = qman_get_qm_portal_config(p); 149 if (pcfg) { 150 /* select any other online CPU */ 151 cpu = cpumask_any_but(cpu_online_mask, cpu); 152 irq_set_affinity(pcfg->irq, cpumask_of(cpu)); 153 qman_portal_update_sdest(pcfg, cpu); 154 } 155 } 156 return 0; 157 } 158 159 static int qman_online_cpu(unsigned int cpu) 160 { 161 struct qman_portal *p; 162 const struct qm_portal_config *pcfg; 163 164 p = affine_portals[cpu]; 165 if (p) { 166 pcfg = qman_get_qm_portal_config(p); 167 if (pcfg) { 168 irq_set_affinity(pcfg->irq, cpumask_of(cpu)); 169 qman_portal_update_sdest(pcfg, cpu); 170 } 171 } 172 return 0; 173 } 174 175 int qman_portals_probed(void) 176 { 177 return __qman_portals_probed; 178 } 179 EXPORT_SYMBOL_GPL(qman_portals_probed); 180 181 static int qman_portal_probe(struct platform_device *pdev) 182 { 183 struct device *dev = &pdev->dev; 184 struct device_node *node = dev->of_node; 185 struct qm_portal_config *pcfg; 186 struct resource *addr_phys[2]; 187 int irq, cpu, err, i; 188 u32 val; 189 190 err = qman_is_probed(); 191 if (!err) 192 return -EPROBE_DEFER; 193 if (err < 0) { 194 dev_err(&pdev->dev, "failing probe due to qman probe error\n"); 195 return -ENODEV; 196 } 197 198 pcfg = devm_kmalloc(dev, sizeof(*pcfg), GFP_KERNEL); 199 if (!pcfg) { 200 __qman_portals_probed = -1; 201 return -ENOMEM; 202 } 203 204 pcfg->dev = dev; 205 206 addr_phys[0] = platform_get_resource(pdev, IORESOURCE_MEM, 207 DPAA_PORTAL_CE); 208 if (!addr_phys[0]) { 209 dev_err(dev, "Can't get %pOF property 'reg::CE'\n", node); 210 goto err_ioremap1; 211 } 212 213 addr_phys[1] = platform_get_resource(pdev, IORESOURCE_MEM, 214 DPAA_PORTAL_CI); 215 if (!addr_phys[1]) { 216 dev_err(dev, "Can't get %pOF property 'reg::CI'\n", node); 217 goto err_ioremap1; 218 } 219 220 err = of_property_read_u32(node, "cell-index", &val); 221 if (err) { 222 dev_err(dev, "Can't get %pOF property 'cell-index'\n", node); 223 __qman_portals_probed = -1; 224 return err; 225 } 226 pcfg->channel = val; 227 pcfg->cpu = -1; 228 irq = platform_get_irq(pdev, 0); 229 if (irq <= 0) 230 goto err_ioremap1; 231 pcfg->irq = irq; 232 233 pcfg->addr_virt_ce = memremap(addr_phys[0]->start, 234 resource_size(addr_phys[0]), 235 QBMAN_MEMREMAP_ATTR); 236 if (!pcfg->addr_virt_ce) { 237 dev_err(dev, "memremap::CE failed\n"); 238 goto err_ioremap1; 239 } 240 241 pcfg->addr_virt_ci = ioremap(addr_phys[1]->start, 242 resource_size(addr_phys[1])); 243 if (!pcfg->addr_virt_ci) { 244 dev_err(dev, "ioremap::CI failed\n"); 245 goto err_ioremap2; 246 } 247 248 pcfg->pools = qm_get_pools_sdqcr(); 249 250 spin_lock(&qman_lock); 251 cpu = cpumask_next_zero(-1, &portal_cpus); 252 if (cpu >= nr_cpu_ids) { 253 __qman_portals_probed = 1; 254 /* unassigned portal, skip init */ 255 spin_unlock(&qman_lock); 256 goto check_cleanup; 257 } 258 259 cpumask_set_cpu(cpu, &portal_cpus); 260 spin_unlock(&qman_lock); 261 pcfg->cpu = cpu; 262 263 if (dma_set_mask(dev, DMA_BIT_MASK(40))) { 264 dev_err(dev, "dma_set_mask() failed\n"); 265 goto err_portal_init; 266 } 267 268 if (!init_pcfg(pcfg)) { 269 dev_err(dev, "portal init failed\n"); 270 goto err_portal_init; 271 } 272 273 /* clear irq affinity if assigned cpu is offline */ 274 if (!cpu_online(cpu)) 275 qman_offline_cpu(cpu); 276 277 check_cleanup: 278 if (__qman_portals_probed == 1 && qman_requires_cleanup()) { 279 /* 280 * QMan wasn't reset prior to boot (Kexec for example) 281 * Empty all the frame queues so they are in reset state 282 */ 283 for (i = 0; i < qm_get_fqid_maxcnt(); i++) { 284 err = qman_shutdown_fq(i); 285 if (err) { 286 dev_err(dev, "Failed to shutdown frame queue %d\n", 287 i); 288 goto err_portal_init; 289 } 290 } 291 qman_done_cleanup(); 292 } 293 294 return 0; 295 296 err_portal_init: 297 iounmap(pcfg->addr_virt_ci); 298 err_ioremap2: 299 memunmap(pcfg->addr_virt_ce); 300 err_ioremap1: 301 __qman_portals_probed = -1; 302 303 return -ENXIO; 304 } 305 306 static const struct of_device_id qman_portal_ids[] = { 307 { 308 .compatible = "fsl,qman-portal", 309 }, 310 {} 311 }; 312 MODULE_DEVICE_TABLE(of, qman_portal_ids); 313 314 static struct platform_driver qman_portal_driver = { 315 .driver = { 316 .name = KBUILD_MODNAME, 317 .of_match_table = qman_portal_ids, 318 }, 319 .probe = qman_portal_probe, 320 }; 321 322 static int __init qman_portal_driver_register(struct platform_driver *drv) 323 { 324 int ret; 325 326 ret = platform_driver_register(drv); 327 if (ret < 0) 328 return ret; 329 330 ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, 331 "soc/qman_portal:online", 332 qman_online_cpu, qman_offline_cpu); 333 if (ret < 0) { 334 pr_err("qman: failed to register hotplug callbacks.\n"); 335 platform_driver_unregister(drv); 336 return ret; 337 } 338 return 0; 339 } 340 341 module_driver(qman_portal_driver, 342 qman_portal_driver_register, platform_driver_unregister); 343