Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Roy Pledge | 1169 | 97.91% | 4 | 57.14% |
Dan Carpenter | 22 | 1.84% | 1 | 14.29% |
Bogdan Purcareata | 3 | 0.25% | 2 | 28.57% |
Total | 1194 | 7 |
// 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/msi.h> #include <linux/dma-mapping.h> #include <linux/delay.h> #include <linux/io.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 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->msi_desc->irq, NULL); } static int register_dpio_irq_handlers(struct fsl_mc_device *dpio_dev, int cpu) { int error; struct fsl_mc_device_irq *irq; cpumask_t mask; irq = dpio_dev->irqs[0]; error = devm_request_irq(&dpio_dev->dev, irq->msi_desc->irq, dpio_irq_handler, 0, dev_name(&dpio_dev->dev), &dpio_dev->dev); if (error < 0) { dev_err(&dpio_dev->dev, "devm_request_irq() failed: %d\n", error); return error; } /* set the affinity hint */ cpumask_clear(&mask); cpumask_set_cpu(cpu, &mask); if (irq_set_affinity_hint(irq->msi_desc->irq, &mask)) dev_err(&dpio_dev->dev, "irq_set_affinity failed irq %d cpu %d\n", irq->msi_desc->irq, 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; static int next_cpu = -1; 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_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; 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 */ if (next_cpu == -1) next_cpu = cpumask_first(cpu_online_mask); else next_cpu = cpumask_next(next_cpu, cpu_online_mask); if (!cpu_possible(next_cpu)) { dev_err(dev, "probe failed. Number of DPIOs exceeds NR_CPUS.\n"); err = -ERANGE; goto err_allocate_irqs; } desc.cpu = next_cpu; /* * 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); 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; } err = register_dpio_irq_handlers(dpio_dev, desc.cpu); if (err) goto err_register_dpio_irq; priv->io = dpaa2_io_create(&desc); if (!priv->io) { dev_err(dev, "dpaa2_io_create failed\n"); err = -ENOMEM; goto err_dpaa2_io_create; } 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); fsl_mc_portal_free(dpio_dev->mc_io); return 0; err_dpaa2_io_create: unregister_dpio_irq_handlers(dpio_dev); err_register_dpio_irq: fsl_mc_free_irqs(dpio_dev); err_allocate_irqs: dpio_disable(dpio_dev->mc_io, 0, dpio_dev->mc_handle); err_get_attr: 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 int dpaa2_dpio_remove(struct fsl_mc_device *dpio_dev) { struct device *dev; struct dpio_priv *priv; int err; dev = &dpio_dev->dev; priv = dev_get_drvdata(dev); dpaa2_io_down(priv->io); dpio_teardown_irqs(dpio_dev); err = fsl_mc_portal_allocate(dpio_dev, 0, &dpio_dev->mc_io); if (err) { dev_err(dev, "MC portal allocation failed\n"); goto err_mcportal; } 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); fsl_mc_portal_free(dpio_dev->mc_io); return 0; err_open: fsl_mc_portal_free(dpio_dev->mc_io); err_mcportal: return err; } 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) { return fsl_mc_driver_register(&dpaa2_dpio_driver); } static void dpio_driver_exit(void) { fsl_mc_driver_unregister(&dpaa2_dpio_driver); } module_init(dpio_driver_init); module_exit(dpio_driver_exit);
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