/* 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 "qman_priv.h"
struct qman_portal *qman_dma_portal;
EXPORT_SYMBOL(qman_dma_portal);
/* Enable portal interupts (as opposed to polling mode) */
#define CONFIG_FSL_DPA_PIRQ_SLOW 1
#define CONFIG_FSL_DPA_PIRQ_FAST 1
static struct cpumask portal_cpus;
static int __qman_portals_probed;
/* protect qman global registers and global data shared among portals */
static DEFINE_SPINLOCK(qman_lock);
static void portal_set_cpu(struct qm_portal_config *pcfg, int cpu)
{
#ifdef CONFIG_FSL_PAMU
struct device *dev = pcfg->dev;
int ret;
pcfg->iommu_domain = iommu_paging_domain_alloc(dev);
if (IS_ERR(pcfg->iommu_domain)) {
dev_err(dev, "%s(): iommu_domain_alloc() failed", __func__);
pcfg->iommu_domain = NULL;
goto no_iommu;
}
ret = fsl_pamu_configure_l1_stash(pcfg->iommu_domain, cpu);
if (ret < 0) {
dev_err(dev, "%s(): fsl_pamu_configure_l1_stash() = %d",
__func__, ret);
goto out_domain_free;
}
ret = iommu_attach_device(pcfg->iommu_domain, dev);
if (ret < 0) {
dev_err(dev, "%s(): iommu_device_attach() = %d", __func__,
ret);
goto out_domain_free;
}
no_iommu:
#endif
qman_set_sdest(pcfg->channel, cpu);
return;
#ifdef CONFIG_FSL_PAMU
out_domain_free:
iommu_domain_free(pcfg->iommu_domain);
pcfg->iommu_domain = NULL;
#endif
}
static struct qman_portal *init_pcfg(struct qm_portal_config *pcfg)
{
struct qman_portal *p;
u32 irq_sources = 0;
/* We need the same LIODN offset for all portals */
qman_liodn_fixup(pcfg->channel);
pcfg->iommu_domain = NULL;
portal_set_cpu(pcfg, pcfg->cpu);
p = qman_create_affine_portal(pcfg, NULL);
if (!p) {
dev_crit(pcfg->dev, "%s: Portal failure on cpu %d\n",
__func__, pcfg->cpu);
return NULL;
}
/* Determine what should be interrupt-vs-poll driven */
#ifdef CONFIG_FSL_DPA_PIRQ_SLOW
irq_sources |= QM_PIRQ_EQCI | QM_PIRQ_EQRI | QM_PIRQ_MRI |
QM_PIRQ_CSCI;
#endif
#ifdef CONFIG_FSL_DPA_PIRQ_FAST
irq_sources |= QM_PIRQ_DQRI;
#endif
qman_p_irqsource_add(p, irq_sources);
spin_lock(&qman_lock);
if (cpumask_equal(&portal_cpus, cpu_possible_mask)) {
/* all assigned portals are initialized now */
qman_init_cgr_all();
}
if (!qman_dma_portal)
qman_dma_portal = p;
spin_unlock(&qman_lock);
dev_info(pcfg->dev, "Portal initialised, cpu %d\n", pcfg->cpu);
return p;
}
static void qman_portal_update_sdest(const struct qm_portal_config *pcfg,
unsigned int cpu)
{
#ifdef CONFIG_FSL_PAMU /* TODO */
if (pcfg->iommu_domain) {
if (fsl_pamu_configure_l1_stash(pcfg->iommu_domain, cpu) < 0) {
dev_err(pcfg->dev,
"Failed to update pamu stash setting\n");
return;
}
}
#endif
qman_set_sdest(pcfg->channel, cpu);
}
static int qman_offline_cpu(unsigned int cpu)
{
struct qman_portal *p;
const struct qm_portal_config *pcfg;
p = affine_portals[cpu];
if (p) {
pcfg = qman_get_qm_portal_config(p);
if (pcfg) {
/* select any other online CPU */
cpu = cpumask_any_but(cpu_online_mask, cpu);
irq_set_affinity(pcfg->irq, cpumask_of(cpu));
qman_portal_update_sdest(pcfg, cpu);
}
}
return 0;
}
static int qman_online_cpu(unsigned int cpu)
{
struct qman_portal *p;
const struct qm_portal_config *pcfg;
p = affine_portals[cpu];
if (p) {
pcfg = qman_get_qm_portal_config(p);
if (pcfg) {
irq_set_affinity(pcfg->irq, cpumask_of(cpu));
qman_portal_update_sdest(pcfg, cpu);
}
}
return 0;
}
int qman_portals_probed(void)
{
return __qman_portals_probed;
}
EXPORT_SYMBOL_GPL(qman_portals_probed);
static int qman_portal_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct qm_portal_config *pcfg;
struct resource *addr_phys[2];
int irq, cpu, err, i;
u32 val;
err = qman_is_probed();
if (!err)
return -EPROBE_DEFER;
if (err < 0) {
dev_err(&pdev->dev, "failing probe due to qman probe error\n");
return -ENODEV;
}
pcfg = devm_kmalloc(dev, sizeof(*pcfg), GFP_KERNEL);
if (!pcfg) {
__qman_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;
}
err = of_property_read_u32(node, "cell-index", &val);
if (err) {
dev_err(dev, "Can't get %pOF property 'cell-index'\n", node);
__qman_portals_probed = -1;
return err;
}
pcfg->channel = val;
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;
}
pcfg->pools = qm_get_pools_sdqcr();
spin_lock(&qman_lock);
cpu = cpumask_first_zero(&portal_cpus);
if (cpu >= nr_cpu_ids) {
__qman_portals_probed = 1;
/* unassigned portal, skip init */
spin_unlock(&qman_lock);
goto check_cleanup;
}
cpumask_set_cpu(cpu, &portal_cpus);
spin_unlock(&qman_lock);
pcfg->cpu = cpu;
if (dma_set_mask(dev, DMA_BIT_MASK(40))) {
dev_err(dev, "dma_set_mask() failed\n");
goto err_portal_init;
}
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))
qman_offline_cpu(cpu);
check_cleanup:
if (__qman_portals_probed == 1 && qman_requires_cleanup()) {
/*
* QMan wasn't reset prior to boot (Kexec for example)
* Empty all the frame queues so they are in reset state
*/
for (i = 0; i < qm_get_fqid_maxcnt(); i++) {
err = qman_shutdown_fq(i);
if (err) {
dev_err(dev, "Failed to shutdown frame queue %d\n",
i);
goto err_portal_init;
}
}
qman_done_cleanup();
}
return 0;
err_portal_init:
iounmap(pcfg->addr_virt_ci);
err_ioremap2:
memunmap(pcfg->addr_virt_ce);
err_ioremap1:
__qman_portals_probed = -1;
return -ENXIO;
}
static const struct of_device_id qman_portal_ids[] = {
{
.compatible = "fsl,qman-portal",
},
{}
};
MODULE_DEVICE_TABLE(of, qman_portal_ids);
static struct platform_driver qman_portal_driver = {
.driver = {
.name = KBUILD_MODNAME,
.of_match_table = qman_portal_ids,
},
.probe = qman_portal_probe,
};
static int __init qman_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/qman_portal:online",
qman_online_cpu, qman_offline_cpu);
if (ret < 0) {
pr_err("qman: failed to register hotplug callbacks.\n");
platform_driver_unregister(drv);
return ret;
}
return 0;
}
module_driver(qman_portal_driver,
qman_portal_driver_register, platform_driver_unregister);
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