1 files changed, 244 insertions, 0 deletions
diff --git a/drivers/soc/fsl/qbman/bman_portal.c b/drivers/soc/fsl/qbman/bman_portal.c
new file mode 100644
index 000000000..4d7b9caee
--- /dev/null
+++ b/drivers/soc/fsl/qbman/bman_portal.c
@@ -0,0 +1,244 @@
+/* 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);