245 lines
6.3 KiB
C
245 lines
6.3 KiB
C
|
/* Copyright 2008 - 2016 Freescale Semiconductor, Inc.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions are met:
|
||
|
|
* * Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* * Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* * Neither the name of Freescale Semiconductor nor the
|
||
|
|
* names of its contributors may be used to endorse or promote products
|
||
|
|
* derived from this software without specific prior written permission.
|
||
|
|
*
|
||
|
|
* ALTERNATIVELY, this software may be distributed under the terms of the
|
||
|
|
* GNU General Public License ("GPL") as published by the Free Software
|
||
|
|
* Foundation, either version 2 of that License or (at your option) any
|
||
|
|
* later version.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
|
||
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
||
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||
|
|
* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
|
||
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
||
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
||
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "bman_priv.h"
|
||
|
|
|
||
|
|
static struct bman_portal *affine_bportals[NR_CPUS];
|
||
|
|
static struct cpumask portal_cpus;
|
||
|
|
static int __bman_portals_probed;
|
||
|
|
/* protect bman global registers and global data shared among portals */
|
||
|
|
static DEFINE_SPINLOCK(bman_lock);
|
||
|
|
|
||
|
|
static struct bman_portal *init_pcfg(struct bm_portal_config *pcfg)
|
||
|
|
{
|
||
|
|
struct bman_portal *p = bman_create_affine_portal(pcfg);
|
||
|
|
|
||
|
|
if (!p) {
|
||
|
|
dev_crit(pcfg->dev, "%s: Portal failure on cpu %d\n",
|
||
|
|
__func__, pcfg->cpu);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
bman_p_irqsource_add(p, BM_PIRQ_RCRI);
|
||
|
|
affine_bportals[pcfg->cpu] = p;
|
||
|
|
|
||
|
|
dev_info(pcfg->dev, "Portal initialised, cpu %d\n", pcfg->cpu);
|
||
|
|
|
||
|
|
return p;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int bman_offline_cpu(unsigned int cpu)
|
||
|
|
{
|
||
|
|
struct bman_portal *p = affine_bportals[cpu];
|
||
|
|
const struct bm_portal_config *pcfg;
|
||
|
|
|
||
|
|
if (!p)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
pcfg = bman_get_bm_portal_config(p);
|
||
|
|
if (!pcfg)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
/* use any other online CPU */
|
||
|
|
cpu = cpumask_any_but(cpu_online_mask, cpu);
|
||
|
|
irq_set_affinity(pcfg->irq, cpumask_of(cpu));
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int bman_online_cpu(unsigned int cpu)
|
||
|
|
{
|
||
|
|
struct bman_portal *p = affine_bportals[cpu];
|
||
|
|
const struct bm_portal_config *pcfg;
|
||
|
|
|
||
|
|
if (!p)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
pcfg = bman_get_bm_portal_config(p);
|
||
|
|
if (!pcfg)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
irq_set_affinity(pcfg->irq, cpumask_of(cpu));
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int bman_portals_probed(void)
|
||
|
|
{
|
||
|
|
return __bman_portals_probed;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(bman_portals_probed);
|
||
|
|
|
||
|
|
static int bman_portal_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct device *dev = &pdev->dev;
|
||
|
|
struct device_node *node = dev->of_node;
|
||
|
|
struct bm_portal_config *pcfg;
|
||
|
|
struct resource *addr_phys[2];
|
||
|
|
int irq, cpu, err, i;
|
||
|
|
|
||
|
|
err = bman_is_probed();
|
||
|
|
if (!err)
|
||
|
|
return -EPROBE_DEFER;
|
||
|
|
if (err < 0) {
|
||
|
|
dev_err(&pdev->dev, "failing probe due to bman probe error\n");
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
pcfg = devm_kmalloc(dev, sizeof(*pcfg), GFP_KERNEL);
|
||
|
|
if (!pcfg) {
|
||
|
|
__bman_portals_probed = -1;
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
pcfg->dev = dev;
|
||
|
|
|
||
|
|
addr_phys[0] = platform_get_resource(pdev, IORESOURCE_MEM,
|
||
|
|
DPAA_PORTAL_CE);
|
||
|
|
if (!addr_phys[0]) {
|
||
|
|
dev_err(dev, "Can't get %pOF property 'reg::CE'\n", node);
|
||
|
|
goto err_ioremap1;
|
||
|
|
}
|
||
|
|
|
||
|
|
addr_phys[1] = platform_get_resource(pdev, IORESOURCE_MEM,
|
||
|
|
DPAA_PORTAL_CI);
|
||
|
|
if (!addr_phys[1]) {
|
||
|
|
dev_err(dev, "Can't get %pOF property 'reg::CI'\n", node);
|
||
|
|
goto err_ioremap1;
|
||
|
|
}
|
||
|
|
|
||
|
|
pcfg->cpu = -1;
|
||
|
|
|
||
|
|
irq = platform_get_irq(pdev, 0);
|
||
|
|
if (irq <= 0)
|
||
|
|
goto err_ioremap1;
|
||
|
|
pcfg->irq = irq;
|
||
|
|
|
||
|
|
pcfg->addr_virt_ce = memremap(addr_phys[0]->start,
|
||
|
|
resource_size(addr_phys[0]),
|
||
|
|
QBMAN_MEMREMAP_ATTR);
|
||
|
|
if (!pcfg->addr_virt_ce) {
|
||
|
|
dev_err(dev, "memremap::CE failed\n");
|
||
|
|
goto err_ioremap1;
|
||
|
|
}
|
||
|
|
|
||
|
|
pcfg->addr_virt_ci = ioremap(addr_phys[1]->start,
|
||
|
|
resource_size(addr_phys[1]));
|
||
|
|
if (!pcfg->addr_virt_ci) {
|
||
|
|
dev_err(dev, "ioremap::CI failed\n");
|
||
|
|
goto err_ioremap2;
|
||
|
|
}
|
||
|
|
|
||
|
|
spin_lock(&bman_lock);
|
||
|
|
cpu = cpumask_first_zero(&portal_cpus);
|
||
|
|
if (cpu >= nr_cpu_ids) {
|
||
|
|
__bman_portals_probed = 1;
|
||
|
|
/* unassigned portal, skip init */
|
||
|
|
spin_unlock(&bman_lock);
|
||
|
|
goto check_cleanup;
|
||
|
|
}
|
||
|
|
|
||
|
|
cpumask_set_cpu(cpu, &portal_cpus);
|
||
|
|
spin_unlock(&bman_lock);
|
||
|
|
pcfg->cpu = cpu;
|
||
|
|
|
||
|
|
if (!init_pcfg(pcfg)) {
|
||
|
|
dev_err(dev, "portal init failed\n");
|
||
|
|
goto err_portal_init;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* clear irq affinity if assigned cpu is offline */
|
||
|
|
if (!cpu_online(cpu))
|
||
|
|
bman_offline_cpu(cpu);
|
||
|
|
|
||
|
|
check_cleanup:
|
||
|
|
if (__bman_portals_probed == 1 && bman_requires_cleanup()) {
|
||
|
|
/*
|
||
|
|
* BMan wasn't reset prior to boot (Kexec for example)
|
||
|
|
* Empty all the buffer pools so they are in reset state
|
||
|
|
*/
|
||
|
|
for (i = 0; i < BM_POOL_MAX; i++) {
|
||
|
|
err = bm_shutdown_pool(i);
|
||
|
|
if (err) {
|
||
|
|
dev_err(dev, "Failed to shutdown bpool %d\n",
|
||
|
|
i);
|
||
|
|
goto err_portal_init;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
bman_done_cleanup();
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err_portal_init:
|
||
|
|
iounmap(pcfg->addr_virt_ci);
|
||
|
|
err_ioremap2:
|
||
|
|
memunmap(pcfg->addr_virt_ce);
|
||
|
|
err_ioremap1:
|
||
|
|
__bman_portals_probed = -1;
|
||
|
|
|
||
|
|
return -ENXIO;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct of_device_id bman_portal_ids[] = {
|
||
|
|
{
|
||
|
|
.compatible = "fsl,bman-portal",
|
||
|
|
},
|
||
|
|
{}
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, bman_portal_ids);
|
||
|
|
|
||
|
|
static struct platform_driver bman_portal_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = KBUILD_MODNAME,
|
||
|
|
.of_match_table = bman_portal_ids,
|
||
|
|
},
|
||
|
|
.probe = bman_portal_probe,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init bman_portal_driver_register(struct platform_driver *drv)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = platform_driver_register(drv);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
|
||
|
|
"soc/qbman_portal:online",
|
||
|
|
bman_online_cpu, bman_offline_cpu);
|
||
|
|
if (ret < 0) {
|
||
|
|
pr_err("bman: failed to register hotplug callbacks.\n");
|
||
|
|
platform_driver_unregister(drv);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
module_driver(bman_portal_driver,
|
||
|
|
bman_portal_driver_register, platform_driver_unregister);
|