| // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) | |
| /* | |
| * Copyright 2014-2016 Freescale Semiconductor Inc. | |
| * Copyright NXP 2016 | |
| * | |
| */ | |
| #include <linux/types.h> | |
| #include <linux/init.h> | |
| #include <linux/module.h> | |
| #include <linux/platform_device.h> | |
| #include <linux/interrupt.h> | |
| #include <linux/dma-mapping.h> | |
| #include <linux/delay.h> | |
| #include <linux/io.h> | |
| #include <linux/sys_soc.h> | |
| #include <linux/fsl/mc.h> | |
| #include <soc/fsl/dpaa2-io.h> | |
| #include "qbman-portal.h" | |
| #include "dpio.h" | |
| #include "dpio-cmd.h" | |
| MODULE_LICENSE("Dual BSD/GPL"); | |
| MODULE_AUTHOR("Freescale Semiconductor, Inc"); | |
| MODULE_DESCRIPTION("DPIO Driver"); | |
| struct dpio_priv { | |
| struct dpaa2_io *io; | |
| }; | |
| static cpumask_var_t cpus_unused_mask; | |
| static const struct soc_device_attribute ls1088a_soc[] = { | |
| {.family = "QorIQ LS1088A"}, | |
| { /* sentinel */ } | |
| }; | |
| static const struct soc_device_attribute ls2080a_soc[] = { | |
| {.family = "QorIQ LS2080A"}, | |
| { /* sentinel */ } | |
| }; | |
| static const struct soc_device_attribute ls2088a_soc[] = { | |
| {.family = "QorIQ LS2088A"}, | |
| { /* sentinel */ } | |
| }; | |
| static const struct soc_device_attribute lx2160a_soc[] = { | |
| {.family = "QorIQ LX2160A"}, | |
| { /* sentinel */ } | |
| }; | |
| static int dpaa2_dpio_get_cluster_sdest(struct fsl_mc_device *dpio_dev, int cpu) | |
| { | |
| int cluster_base, cluster_size; | |
| if (soc_device_match(ls1088a_soc)) { | |
| cluster_base = 2; | |
| cluster_size = 4; | |
| } else if (soc_device_match(ls2080a_soc) || | |
| soc_device_match(ls2088a_soc) || | |
| soc_device_match(lx2160a_soc)) { | |
| cluster_base = 0; | |
| cluster_size = 2; | |
| } else { | |
| dev_err(&dpio_dev->dev, "unknown SoC version\n"); | |
| return -1; | |
| } | |
| return cluster_base + cpu / cluster_size; | |
| } | |
| static irqreturn_t dpio_irq_handler(int irq_num, void *arg) | |
| { | |
| struct device *dev = (struct device *)arg; | |
| struct dpio_priv *priv = dev_get_drvdata(dev); | |
| return dpaa2_io_irq(priv->io); | |
| } | |
| static void unregister_dpio_irq_handlers(struct fsl_mc_device *dpio_dev) | |
| { | |
| struct fsl_mc_device_irq *irq; | |
| irq = dpio_dev->irqs[0]; | |
| /* clear the affinity hint */ | |
| irq_set_affinity_hint(irq->virq, NULL); | |
| devm_free_irq(&dpio_dev->dev, irq->virq, &dpio_dev->dev); | |
| } | |
| static int register_dpio_irq_handlers(struct fsl_mc_device *dpio_dev, int cpu) | |
| { | |
| int error; | |
| struct fsl_mc_device_irq *irq; | |
| irq = dpio_dev->irqs[0]; | |
| error = devm_request_irq(&dpio_dev->dev, | |
| irq->virq, | |
| dpio_irq_handler, | |
| 0, | |
| dev_name(&dpio_dev->dev), | |
| &dpio_dev->dev); | |
| if (error < 0) | |
| return error; | |
| /* set the affinity hint */ | |
| if (irq_set_affinity_hint(irq->virq, cpumask_of(cpu))) | |
| dev_err(&dpio_dev->dev, | |
| "irq_set_affinity failed irq %d cpu %d\n", | |
| irq->virq, cpu); | |
| return 0; | |
| } | |
| static int dpaa2_dpio_probe(struct fsl_mc_device *dpio_dev) | |
| { | |
| struct dpio_attr dpio_attrs; | |
| struct dpaa2_io_desc desc; | |
| struct dpio_priv *priv; | |
| int err = -ENOMEM; | |
| struct device *dev = &dpio_dev->dev; | |
| int possible_next_cpu; | |
| int sdest; | |
| priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); | |
| if (!priv) | |
| goto err_priv_alloc; | |
| dev_set_drvdata(dev, priv); | |
| err = fsl_mc_portal_allocate(dpio_dev, 0, &dpio_dev->mc_io); | |
| if (err) { | |
| dev_dbg(dev, "MC portal allocation failed\n"); | |
| err = -EPROBE_DEFER; | |
| goto err_priv_alloc; | |
| } | |
| err = dpio_open(dpio_dev->mc_io, 0, dpio_dev->obj_desc.id, | |
| &dpio_dev->mc_handle); | |
| if (err) { | |
| dev_err(dev, "dpio_open() failed\n"); | |
| goto err_open; | |
| } | |
| err = dpio_reset(dpio_dev->mc_io, 0, dpio_dev->mc_handle); | |
| if (err) { | |
| dev_err(dev, "dpio_reset() failed\n"); | |
| goto err_reset; | |
| } | |
| err = dpio_get_attributes(dpio_dev->mc_io, 0, dpio_dev->mc_handle, | |
| &dpio_attrs); | |
| if (err) { | |
| dev_err(dev, "dpio_get_attributes() failed %d\n", err); | |
| goto err_get_attr; | |
| } | |
| desc.qman_version = dpio_attrs.qbman_version; | |
| desc.qman_clk = dpio_attrs.clk; | |
| err = dpio_enable(dpio_dev->mc_io, 0, dpio_dev->mc_handle); | |
| if (err) { | |
| dev_err(dev, "dpio_enable() failed %d\n", err); | |
| goto err_get_attr; | |
| } | |
| /* initialize DPIO descriptor */ | |
| desc.receives_notifications = dpio_attrs.num_priorities ? 1 : 0; | |
| desc.has_8prio = dpio_attrs.num_priorities == 8 ? 1 : 0; | |
| desc.dpio_id = dpio_dev->obj_desc.id; | |
| /* get the cpu to use for the affinity hint */ | |
| possible_next_cpu = cpumask_first(cpus_unused_mask); | |
| if (possible_next_cpu >= nr_cpu_ids) { | |
| dev_err(dev, "probe failed. Number of DPIOs exceeds NR_CPUS.\n"); | |
| err = -ERANGE; | |
| goto err_allocate_irqs; | |
| } | |
| desc.cpu = possible_next_cpu; | |
| cpumask_clear_cpu(possible_next_cpu, cpus_unused_mask); | |
| sdest = dpaa2_dpio_get_cluster_sdest(dpio_dev, desc.cpu); | |
| if (sdest >= 0) { | |
| err = dpio_set_stashing_destination(dpio_dev->mc_io, 0, | |
| dpio_dev->mc_handle, | |
| sdest); | |
| if (err) | |
| dev_err(dev, "dpio_set_stashing_destination failed for cpu%d\n", | |
| desc.cpu); | |
| } | |
| if (dpio_dev->obj_desc.region_count < 3) { | |
| /* No support for DDR backed portals, use classic mapping */ | |
| /* | |
| * Set the CENA regs to be the cache inhibited area of the | |
| * portal to avoid coherency issues if a user migrates to | |
| * another core. | |
| */ | |
| desc.regs_cena = devm_memremap(dev, dpio_dev->regions[1].start, | |
| resource_size(&dpio_dev->regions[1]), | |
| MEMREMAP_WC); | |
| } else { | |
| desc.regs_cena = devm_memremap(dev, dpio_dev->regions[2].start, | |
| resource_size(&dpio_dev->regions[2]), | |
| MEMREMAP_WB); | |
| } | |
| if (IS_ERR(desc.regs_cena)) { | |
| dev_err(dev, "devm_memremap failed\n"); | |
| err = PTR_ERR(desc.regs_cena); | |
| goto err_allocate_irqs; | |
| } | |
| desc.regs_cinh = devm_ioremap(dev, dpio_dev->regions[1].start, | |
| resource_size(&dpio_dev->regions[1])); | |
| if (!desc.regs_cinh) { | |
| err = -ENOMEM; | |
| dev_err(dev, "devm_ioremap failed\n"); | |
| goto err_allocate_irqs; | |
| } | |
| err = fsl_mc_allocate_irqs(dpio_dev); | |
| if (err) { | |
| dev_err(dev, "fsl_mc_allocate_irqs failed. err=%d\n", err); | |
| goto err_allocate_irqs; | |
| } | |
| priv->io = dpaa2_io_create(&desc, dev); | |
| if (!priv->io) { | |
| dev_err(dev, "dpaa2_io_create failed\n"); | |
| err = -ENOMEM; | |
| goto err_dpaa2_io_create; | |
| } | |
| err = register_dpio_irq_handlers(dpio_dev, desc.cpu); | |
| if (err) | |
| goto err_register_dpio_irq; | |
| dev_info(dev, "probed\n"); | |
| dev_dbg(dev, " receives_notifications = %d\n", | |
| desc.receives_notifications); | |
| dpio_close(dpio_dev->mc_io, 0, dpio_dev->mc_handle); | |
| return 0; | |
| err_register_dpio_irq: | |
| dpaa2_io_down(priv->io); | |
| err_dpaa2_io_create: | |
| fsl_mc_free_irqs(dpio_dev); | |
| err_allocate_irqs: | |
| dpio_disable(dpio_dev->mc_io, 0, dpio_dev->mc_handle); | |
| err_get_attr: | |
| err_reset: | |
| dpio_close(dpio_dev->mc_io, 0, dpio_dev->mc_handle); | |
| err_open: | |
| fsl_mc_portal_free(dpio_dev->mc_io); | |
| err_priv_alloc: | |
| return err; | |
| } | |
| /* Tear down interrupts for a given DPIO object */ | |
| static void dpio_teardown_irqs(struct fsl_mc_device *dpio_dev) | |
| { | |
| unregister_dpio_irq_handlers(dpio_dev); | |
| fsl_mc_free_irqs(dpio_dev); | |
| } | |
| static void dpaa2_dpio_remove(struct fsl_mc_device *dpio_dev) | |
| { | |
| struct device *dev; | |
| struct dpio_priv *priv; | |
| int err = 0, cpu; | |
| dev = &dpio_dev->dev; | |
| priv = dev_get_drvdata(dev); | |
| cpu = dpaa2_io_get_cpu(priv->io); | |
| dpio_teardown_irqs(dpio_dev); | |
| dpaa2_io_down(priv->io); | |
| cpumask_set_cpu(cpu, cpus_unused_mask); | |
| err = dpio_open(dpio_dev->mc_io, 0, dpio_dev->obj_desc.id, | |
| &dpio_dev->mc_handle); | |
| if (err) { | |
| dev_err(dev, "dpio_open() failed\n"); | |
| goto err_open; | |
| } | |
| dpio_disable(dpio_dev->mc_io, 0, dpio_dev->mc_handle); | |
| dpio_close(dpio_dev->mc_io, 0, dpio_dev->mc_handle); | |
| err_open: | |
| fsl_mc_portal_free(dpio_dev->mc_io); | |
| } | |
| static const struct fsl_mc_device_id dpaa2_dpio_match_id_table[] = { | |
| { | |
| .vendor = FSL_MC_VENDOR_FREESCALE, | |
| .obj_type = "dpio", | |
| }, | |
| { .vendor = 0x0 } | |
| }; | |
| static struct fsl_mc_driver dpaa2_dpio_driver = { | |
| .driver = { | |
| .name = KBUILD_MODNAME, | |
| .owner = THIS_MODULE, | |
| }, | |
| .probe = dpaa2_dpio_probe, | |
| .remove = dpaa2_dpio_remove, | |
| .match_id_table = dpaa2_dpio_match_id_table | |
| }; | |
| static int dpio_driver_init(void) | |
| { | |
| if (!zalloc_cpumask_var(&cpus_unused_mask, GFP_KERNEL)) | |
| return -ENOMEM; | |
| cpumask_copy(cpus_unused_mask, cpu_online_mask); | |
| return fsl_mc_driver_register(&dpaa2_dpio_driver); | |
| } | |
| static void dpio_driver_exit(void) | |
| { | |
| free_cpumask_var(cpus_unused_mask); | |
| fsl_mc_driver_unregister(&dpaa2_dpio_driver); | |
| } | |
| module_init(dpio_driver_init); | |
| module_exit(dpio_driver_exit); |