e23b60618c1a15aa7f89f655ded6bdbb732ae2a5
[releases.git] / qman_portal.c
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_first_zero(&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);