1 /* Copyright 2008 - 2016 Freescale Semiconductor, Inc.
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.
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
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.
31 #include "qman_priv.h"
33 struct qman_portal
*qman_dma_portal
;
34 EXPORT_SYMBOL(qman_dma_portal
);
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
40 static struct cpumask portal_cpus
;
41 /* protect qman global registers and global data shared among portals */
42 static DEFINE_SPINLOCK(qman_lock
);
44 static void portal_set_cpu(struct qm_portal_config
*pcfg
, int cpu
)
46 #ifdef CONFIG_FSL_PAMU
47 struct device
*dev
= pcfg
->dev
;
49 struct iommu_domain_geometry geom_attr
;
50 struct pamu_stash_attribute stash_attr
;
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__
);
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
,
65 dev_err(dev
, "%s(): iommu_domain_set_attr() = %d", __func__
,
69 ret
= iommu_domain_set_attr(pcfg
->iommu_domain
, DOMAIN_ATTR_WINDOWS
,
72 dev_err(dev
, "%s(): iommu_domain_set_attr() = %d", __func__
,
77 stash_attr
.cache
= PAMU_ATTR_CACHE_L1
;
78 ret
= iommu_domain_set_attr(pcfg
->iommu_domain
,
79 DOMAIN_ATTR_FSL_PAMU_STASH
,
82 dev_err(dev
, "%s(): iommu_domain_set_attr() = %d",
86 ret
= iommu_domain_window_enable(pcfg
->iommu_domain
, 0, 0, 1ULL << 36,
87 IOMMU_READ
| IOMMU_WRITE
);
89 dev_err(dev
, "%s(): iommu_domain_window_enable() = %d",
93 ret
= iommu_attach_device(pcfg
->iommu_domain
, dev
);
95 dev_err(dev
, "%s(): iommu_device_attach() = %d", __func__
,
99 ret
= iommu_domain_set_attr(pcfg
->iommu_domain
,
100 DOMAIN_ATTR_FSL_PAMU_ENABLE
,
103 dev_err(dev
, "%s(): iommu_domain_set_attr() = %d", __func__
,
105 goto out_detach_device
;
110 qman_set_sdest(pcfg
->channel
, cpu
);
114 #ifdef CONFIG_FSL_PAMU
116 iommu_detach_device(pcfg
->iommu_domain
, NULL
);
118 iommu_domain_free(pcfg
->iommu_domain
);
119 pcfg
->iommu_domain
= NULL
;
123 static struct qman_portal
*init_pcfg(struct qm_portal_config
*pcfg
)
125 struct qman_portal
*p
;
128 /* We need the same LIODN offset for all portals */
129 qman_liodn_fixup(pcfg
->channel
);
131 pcfg
->iommu_domain
= NULL
;
132 portal_set_cpu(pcfg
, pcfg
->cpu
);
134 p
= qman_create_affine_portal(pcfg
, NULL
);
136 dev_crit(pcfg
->dev
, "%s: Portal failure on cpu %d\n",
137 __func__
, pcfg
->cpu
);
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
|
146 #ifdef CONFIG_FSL_DPA_PIRQ_FAST
147 irq_sources
|= QM_PIRQ_DQRI
;
149 qman_p_irqsource_add(p
, irq_sources
);
151 spin_lock(&qman_lock
);
152 if (cpumask_equal(&portal_cpus
, cpu_possible_mask
)) {
153 /* all assigned portals are initialized now */
157 if (!qman_dma_portal
)
160 spin_unlock(&qman_lock
);
162 dev_info(pcfg
->dev
, "Portal initialised, cpu %d\n", pcfg
->cpu
);
167 static void qman_portal_update_sdest(const struct qm_portal_config
*pcfg
,
170 #ifdef CONFIG_FSL_PAMU /* TODO */
171 struct pamu_stash_attribute stash_attr
;
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
);
181 "Failed to update pamu stash setting\n");
186 qman_set_sdest(pcfg
->channel
, cpu
);
189 static int qman_offline_cpu(unsigned int cpu
)
191 struct qman_portal
*p
;
192 const struct qm_portal_config
*pcfg
;
194 p
= affine_portals
[cpu
];
196 pcfg
= qman_get_qm_portal_config(p
);
198 irq_set_affinity(pcfg
->irq
, cpumask_of(0));
199 qman_portal_update_sdest(pcfg
, 0);
205 static int qman_online_cpu(unsigned int cpu
)
207 struct qman_portal
*p
;
208 const struct qm_portal_config
*pcfg
;
210 p
= affine_portals
[cpu
];
212 pcfg
= qman_get_qm_portal_config(p
);
214 irq_set_affinity(pcfg
->irq
, cpumask_of(cpu
));
215 qman_portal_update_sdest(pcfg
, cpu
);
221 static int qman_portal_probe(struct platform_device
*pdev
)
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];
230 pcfg
= devm_kmalloc(dev
, sizeof(*pcfg
), GFP_KERNEL
);
236 addr_phys
[0] = platform_get_resource(pdev
, IORESOURCE_MEM
,
239 dev_err(dev
, "Can't get %pOF property 'reg::CE'\n", node
);
243 addr_phys
[1] = platform_get_resource(pdev
, IORESOURCE_MEM
,
246 dev_err(dev
, "Can't get %pOF property 'reg::CI'\n", node
);
250 err
= of_property_read_u32(node
, "cell-index", &val
);
252 dev_err(dev
, "Can't get %pOF property 'cell-index'\n", node
);
257 irq
= platform_get_irq(pdev
, 0);
259 dev_err(dev
, "Can't get %pOF IRQ\n", node
);
264 pcfg
->addr_virt_ce
= memremap(addr_phys
[0]->start
,
265 resource_size(addr_phys
[0]),
266 QBMAN_MEMREMAP_ATTR
);
267 if (!pcfg
->addr_virt_ce
) {
268 dev_err(dev
, "memremap::CE failed\n");
272 pcfg
->addr_virt_ci
= ioremap(addr_phys
[1]->start
,
273 resource_size(addr_phys
[1]));
274 if (!pcfg
->addr_virt_ci
) {
275 dev_err(dev
, "ioremap::CI failed\n");
279 pcfg
->pools
= qm_get_pools_sdqcr();
281 spin_lock(&qman_lock
);
282 cpu
= cpumask_next_zero(-1, &portal_cpus
);
283 if (cpu
>= nr_cpu_ids
) {
284 /* unassigned portal, skip init */
285 spin_unlock(&qman_lock
);
289 cpumask_set_cpu(cpu
, &portal_cpus
);
290 spin_unlock(&qman_lock
);
293 if (dma_set_mask(dev
, DMA_BIT_MASK(40))) {
294 dev_err(dev
, "dma_set_mask() failed\n");
295 goto err_portal_init
;
298 if (!init_pcfg(pcfg
)) {
299 dev_err(dev
, "portal init failed\n");
300 goto err_portal_init
;
303 /* clear irq affinity if assigned cpu is offline */
304 if (!cpu_online(cpu
))
305 qman_offline_cpu(cpu
);
310 iounmap(pcfg
->addr_virt_ci
);
312 memunmap(pcfg
->addr_virt_ce
);
317 static const struct of_device_id qman_portal_ids
[] = {
319 .compatible
= "fsl,qman-portal",
323 MODULE_DEVICE_TABLE(of
, qman_portal_ids
);
325 static struct platform_driver qman_portal_driver
= {
327 .name
= KBUILD_MODNAME
,
328 .of_match_table
= qman_portal_ids
,
330 .probe
= qman_portal_probe
,
333 static int __init
qman_portal_driver_register(struct platform_driver
*drv
)
337 ret
= platform_driver_register(drv
);
341 ret
= cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN
,
342 "soc/qman_portal:online",
343 qman_online_cpu
, qman_offline_cpu
);
345 pr_err("qman: failed to register hotplug callbacks.\n");
346 platform_driver_unregister(drv
);
352 module_driver(qman_portal_driver
,
353 qman_portal_driver_register
, platform_driver_unregister
);