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genirq/msi: Remove platform MSI leftovers
No more users! Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de> Signed-off-by: Shivamurthy Shastri <shivamurthy.shastri@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20240623142235.943295676@linutronix.de
This commit is contained in:
Thomas Gleixner
parent
ce44d1ff46
commit
e989424899
@ -4,346 +4,12 @@
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*
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* Copyright (C) 2015 ARM Limited, All Rights Reserved.
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* Author: Marc Zyngier <marc.zyngier@arm.com>
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* Copyright (C) 2022 Linutronix GmbH
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*/
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#include <linux/device.h>
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#include <linux/idr.h>
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#include <linux/irq.h>
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#include <linux/irqdomain.h>
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#include <linux/msi.h>
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#include <linux/slab.h>
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/* Begin of removal area. Once everything is converted over. Cleanup the includes too! */
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#define DEV_ID_SHIFT 21
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#define MAX_DEV_MSIS (1 << (32 - DEV_ID_SHIFT))
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/*
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* Internal data structure containing a (made up, but unique) devid
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* and the callback to write the MSI message.
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*/
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struct platform_msi_priv_data {
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struct device *dev;
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void *host_data;
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msi_alloc_info_t arg;
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irq_write_msi_msg_t write_msg;
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int devid;
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};
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/* The devid allocator */
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static DEFINE_IDA(platform_msi_devid_ida);
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#ifdef GENERIC_MSI_DOMAIN_OPS
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/*
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* Convert an msi_desc to a globaly unique identifier (per-device
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* devid + msi_desc position in the msi_list).
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*/
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static irq_hw_number_t platform_msi_calc_hwirq(struct msi_desc *desc)
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{
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u32 devid = desc->dev->msi.data->platform_data->devid;
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return (devid << (32 - DEV_ID_SHIFT)) | desc->msi_index;
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}
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static void platform_msi_set_desc(msi_alloc_info_t *arg, struct msi_desc *desc)
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{
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arg->desc = desc;
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arg->hwirq = platform_msi_calc_hwirq(desc);
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}
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static int platform_msi_init(struct irq_domain *domain,
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struct msi_domain_info *info,
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unsigned int virq, irq_hw_number_t hwirq,
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msi_alloc_info_t *arg)
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{
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return irq_domain_set_hwirq_and_chip(domain, virq, hwirq,
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info->chip, info->chip_data);
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}
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static void platform_msi_set_proxy_dev(msi_alloc_info_t *arg)
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{
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arg->flags |= MSI_ALLOC_FLAGS_PROXY_DEVICE;
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}
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#else
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#define platform_msi_set_desc NULL
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#define platform_msi_init NULL
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#define platform_msi_set_proxy_dev(x) do {} while(0)
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#endif
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static void platform_msi_update_dom_ops(struct msi_domain_info *info)
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{
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struct msi_domain_ops *ops = info->ops;
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BUG_ON(!ops);
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if (ops->msi_init == NULL)
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ops->msi_init = platform_msi_init;
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if (ops->set_desc == NULL)
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ops->set_desc = platform_msi_set_desc;
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}
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static void platform_msi_write_msg(struct irq_data *data, struct msi_msg *msg)
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{
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struct msi_desc *desc = irq_data_get_msi_desc(data);
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desc->dev->msi.data->platform_data->write_msg(desc, msg);
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}
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static void platform_msi_update_chip_ops(struct msi_domain_info *info)
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{
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struct irq_chip *chip = info->chip;
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BUG_ON(!chip);
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if (!chip->irq_mask)
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chip->irq_mask = irq_chip_mask_parent;
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if (!chip->irq_unmask)
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chip->irq_unmask = irq_chip_unmask_parent;
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if (!chip->irq_eoi)
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chip->irq_eoi = irq_chip_eoi_parent;
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if (!chip->irq_set_affinity)
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chip->irq_set_affinity = msi_domain_set_affinity;
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if (!chip->irq_write_msi_msg)
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chip->irq_write_msi_msg = platform_msi_write_msg;
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if (WARN_ON((info->flags & MSI_FLAG_LEVEL_CAPABLE) &&
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!(chip->flags & IRQCHIP_SUPPORTS_LEVEL_MSI)))
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info->flags &= ~MSI_FLAG_LEVEL_CAPABLE;
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}
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/**
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* platform_msi_create_irq_domain - Create a platform MSI interrupt domain
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* @fwnode: Optional fwnode of the interrupt controller
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* @info: MSI domain info
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* @parent: Parent irq domain
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*
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* Updates the domain and chip ops and creates a platform MSI
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* interrupt domain.
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*
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* Returns:
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* A domain pointer or NULL in case of failure.
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*/
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struct irq_domain *platform_msi_create_irq_domain(struct fwnode_handle *fwnode,
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struct msi_domain_info *info,
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struct irq_domain *parent)
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{
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struct irq_domain *domain;
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if (info->flags & MSI_FLAG_USE_DEF_DOM_OPS)
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platform_msi_update_dom_ops(info);
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if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS)
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platform_msi_update_chip_ops(info);
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info->flags |= MSI_FLAG_DEV_SYSFS | MSI_FLAG_ALLOC_SIMPLE_MSI_DESCS |
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MSI_FLAG_FREE_MSI_DESCS;
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domain = msi_create_irq_domain(fwnode, info, parent);
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if (domain)
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irq_domain_update_bus_token(domain, DOMAIN_BUS_PLATFORM_MSI);
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return domain;
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}
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EXPORT_SYMBOL_GPL(platform_msi_create_irq_domain);
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static int platform_msi_alloc_priv_data(struct device *dev, unsigned int nvec,
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irq_write_msi_msg_t write_msi_msg)
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{
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struct platform_msi_priv_data *datap;
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int err;
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/*
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* Limit the number of interrupts to 2048 per device. Should we
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* need to bump this up, DEV_ID_SHIFT should be adjusted
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* accordingly (which would impact the max number of MSI
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* capable devices).
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*/
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if (!dev->msi.domain || !write_msi_msg || !nvec || nvec > MAX_DEV_MSIS)
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return -EINVAL;
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if (dev->msi.domain->bus_token != DOMAIN_BUS_PLATFORM_MSI) {
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dev_err(dev, "Incompatible msi_domain, giving up\n");
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return -EINVAL;
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}
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err = msi_setup_device_data(dev);
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if (err)
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return err;
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/* Already initialized? */
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if (dev->msi.data->platform_data)
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return -EBUSY;
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datap = kzalloc(sizeof(*datap), GFP_KERNEL);
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if (!datap)
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return -ENOMEM;
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datap->devid = ida_alloc_max(&platform_msi_devid_ida,
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(1 << DEV_ID_SHIFT) - 1, GFP_KERNEL);
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if (datap->devid < 0) {
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err = datap->devid;
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kfree(datap);
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return err;
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}
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datap->write_msg = write_msi_msg;
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datap->dev = dev;
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dev->msi.data->platform_data = datap;
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return 0;
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}
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static void platform_msi_free_priv_data(struct device *dev)
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{
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struct platform_msi_priv_data *data = dev->msi.data->platform_data;
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dev->msi.data->platform_data = NULL;
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ida_free(&platform_msi_devid_ida, data->devid);
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kfree(data);
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}
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/**
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* platform_msi_domain_alloc_irqs - Allocate MSI interrupts for @dev
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* @dev: The device for which to allocate interrupts
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* @nvec: The number of interrupts to allocate
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* @write_msi_msg: Callback to write an interrupt message for @dev
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*
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* Returns:
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* Zero for success, or an error code in case of failure
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*/
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static int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
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irq_write_msi_msg_t write_msi_msg)
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{
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int err;
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err = platform_msi_alloc_priv_data(dev, nvec, write_msi_msg);
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if (err)
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return err;
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err = msi_domain_alloc_irqs_range(dev, MSI_DEFAULT_DOMAIN, 0, nvec - 1);
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if (err)
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platform_msi_free_priv_data(dev);
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return err;
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}
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/**
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* platform_msi_get_host_data - Query the private data associated with
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* a platform-msi domain
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* @domain: The platform-msi domain
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*
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* Return: The private data provided when calling
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* platform_msi_create_device_domain().
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*/
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void *platform_msi_get_host_data(struct irq_domain *domain)
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{
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struct platform_msi_priv_data *data = domain->host_data;
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return data->host_data;
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}
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static struct lock_class_key platform_device_msi_lock_class;
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/**
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* __platform_msi_create_device_domain - Create a platform-msi device domain
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*
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* @dev: The device generating the MSIs
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* @nvec: The number of MSIs that need to be allocated
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* @is_tree: flag to indicate tree hierarchy
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* @write_msi_msg: Callback to write an interrupt message for @dev
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* @ops: The hierarchy domain operations to use
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* @host_data: Private data associated to this domain
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*
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* Return: An irqdomain for @nvec interrupts on success, NULL in case of error.
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*
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* This is for interrupt domains which stack on a platform-msi domain
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* created by platform_msi_create_irq_domain(). @dev->msi.domain points to
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* that platform-msi domain which is the parent for the new domain.
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*/
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struct irq_domain *
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__platform_msi_create_device_domain(struct device *dev,
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unsigned int nvec,
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bool is_tree,
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irq_write_msi_msg_t write_msi_msg,
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const struct irq_domain_ops *ops,
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void *host_data)
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{
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struct platform_msi_priv_data *data;
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struct irq_domain *domain;
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int err;
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err = platform_msi_alloc_priv_data(dev, nvec, write_msi_msg);
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if (err)
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return NULL;
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/*
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* Use a separate lock class for the MSI descriptor mutex on
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* platform MSI device domains because the descriptor mutex nests
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* into the domain mutex. See alloc/free below.
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*/
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lockdep_set_class(&dev->msi.data->mutex, &platform_device_msi_lock_class);
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data = dev->msi.data->platform_data;
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data->host_data = host_data;
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domain = irq_domain_create_hierarchy(dev->msi.domain, 0,
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is_tree ? 0 : nvec,
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dev->fwnode, ops, data);
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if (!domain)
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goto free_priv;
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platform_msi_set_proxy_dev(&data->arg);
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err = msi_domain_prepare_irqs(domain->parent, dev, nvec, &data->arg);
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if (err)
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goto free_domain;
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return domain;
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free_domain:
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irq_domain_remove(domain);
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free_priv:
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platform_msi_free_priv_data(dev);
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return NULL;
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}
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/**
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* platform_msi_device_domain_free - Free interrupts associated with a platform-msi
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* device domain
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*
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* @domain: The platform-msi device domain
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* @virq: The base irq from which to perform the free operation
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* @nr_irqs: How many interrupts to free from @virq
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*/
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void platform_msi_device_domain_free(struct irq_domain *domain, unsigned int virq,
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unsigned int nr_irqs)
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{
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struct platform_msi_priv_data *data = domain->host_data;
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msi_lock_descs(data->dev);
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msi_domain_depopulate_descs(data->dev, virq, nr_irqs);
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irq_domain_free_irqs_common(domain, virq, nr_irqs);
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msi_free_msi_descs_range(data->dev, virq, virq + nr_irqs - 1);
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msi_unlock_descs(data->dev);
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}
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/**
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* platform_msi_device_domain_alloc - Allocate interrupts associated with
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* a platform-msi device domain
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*
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* @domain: The platform-msi device domain
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* @virq: The base irq from which to perform the allocate operation
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* @nr_irqs: How many interrupts to allocate from @virq
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*
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* Return 0 on success, or an error code on failure. Must be called
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* with irq_domain_mutex held (which can only be done as part of a
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* top-level interrupt allocation).
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*/
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int platform_msi_device_domain_alloc(struct irq_domain *domain, unsigned int virq,
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unsigned int nr_irqs)
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{
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struct platform_msi_priv_data *data = domain->host_data;
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struct device *dev = data->dev;
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return msi_domain_populate_irqs(domain->parent, dev, virq, nr_irqs, &data->arg);
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}
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/* End of removal area */
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/* Real per device domain interfaces */
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/*
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* This indirection can go when platform_device_msi_init_and_alloc_irqs()
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@ -357,7 +23,7 @@ static void platform_msi_write_msi_msg(struct irq_data *d, struct msi_msg *msg)
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cb(irq_data_get_msi_desc(d), msg);
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}
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static void platform_msi_set_desc_byindex(msi_alloc_info_t *arg, struct msi_desc *desc)
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static void platform_msi_set_desc(msi_alloc_info_t *arg, struct msi_desc *desc)
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{
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arg->desc = desc;
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arg->hwirq = desc->msi_index;
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@ -373,7 +39,7 @@ static const struct msi_domain_template platform_msi_template = {
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},
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.ops = {
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.set_desc = platform_msi_set_desc_byindex,
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.set_desc = platform_msi_set_desc,
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},
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.info = {
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@ -408,10 +74,6 @@ int platform_device_msi_init_and_alloc_irqs(struct device *dev, unsigned int nve
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if (!domain || !write_msi_msg)
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return -EINVAL;
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/* Migration support. Will go away once everything is converted */
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if (!irq_domain_is_msi_parent(domain))
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return platform_msi_domain_alloc_irqs(dev, nvec, write_msi_msg);
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/*
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* @write_msi_msg is stored in the resulting msi_domain_info::data.
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* The underlying domain creation mechanism will assign that
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@ -432,12 +94,6 @@ EXPORT_SYMBOL_GPL(platform_device_msi_init_and_alloc_irqs);
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*/
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void platform_device_msi_free_irqs_all(struct device *dev)
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{
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struct irq_domain *domain = dev->msi.domain;
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msi_domain_free_irqs_all(dev, MSI_DEFAULT_DOMAIN);
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/* Migration support. Will go away once everything is converted */
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if (!irq_domain_is_msi_parent(domain))
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platform_msi_free_priv_data(dev);
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}
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EXPORT_SYMBOL_GPL(platform_device_msi_free_irqs_all);
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@ -81,7 +81,6 @@ extern int pci_msi_ignore_mask;
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/* Helper functions */
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struct msi_desc;
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struct pci_dev;
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struct platform_msi_priv_data;
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struct device_attribute;
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struct irq_domain;
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struct irq_affinity_desc;
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@ -231,14 +230,12 @@ struct msi_dev_domain {
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/**
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* msi_device_data - MSI per device data
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* @properties: MSI properties which are interesting to drivers
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* @platform_data: Platform-MSI specific data
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* @mutex: Mutex protecting the MSI descriptor store
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* @__domains: Internal data for per device MSI domains
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* @__iter_idx: Index to search the next entry for iterators
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*/
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struct msi_device_data {
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unsigned long properties;
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struct platform_msi_priv_data *platform_data;
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struct mutex mutex;
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struct msi_dev_domain __domains[MSI_MAX_DEVICE_IRQDOMAINS];
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unsigned long __iter_idx;
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@ -641,33 +638,6 @@ void msi_domain_free_irqs_all(struct device *dev, unsigned int domid);
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struct msi_domain_info *msi_get_domain_info(struct irq_domain *domain);
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struct irq_domain *platform_msi_create_irq_domain(struct fwnode_handle *fwnode,
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struct msi_domain_info *info,
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struct irq_domain *parent);
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/* When an MSI domain is used as an intermediate domain */
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int msi_domain_prepare_irqs(struct irq_domain *domain, struct device *dev,
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int nvec, msi_alloc_info_t *args);
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int msi_domain_populate_irqs(struct irq_domain *domain, struct device *dev,
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int virq, int nvec, msi_alloc_info_t *args);
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void msi_domain_depopulate_descs(struct device *dev, int virq, int nvec);
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struct irq_domain *
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__platform_msi_create_device_domain(struct device *dev,
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unsigned int nvec,
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bool is_tree,
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irq_write_msi_msg_t write_msi_msg,
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const struct irq_domain_ops *ops,
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void *host_data);
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|
||||
#define platform_msi_create_device_tree_domain(dev, nvec, write, ops, data) \
|
||||
__platform_msi_create_device_domain(dev, nvec, true, write, ops, data)
|
||||
|
||||
int platform_msi_device_domain_alloc(struct irq_domain *domain, unsigned int virq,
|
||||
unsigned int nr_irqs);
|
||||
void platform_msi_device_domain_free(struct irq_domain *domain, unsigned int virq,
|
||||
unsigned int nvec);
|
||||
void *platform_msi_get_host_data(struct irq_domain *domain);
|
||||
/* Per device platform MSI */
|
||||
int platform_device_msi_init_and_alloc_irqs(struct device *dev, unsigned int nvec,
|
||||
irq_write_msi_msg_t write_msi_msg);
|
||||
|
||||
@ -1088,8 +1088,8 @@ bool msi_match_device_irq_domain(struct device *dev, unsigned int domid,
|
||||
return ret;
|
||||
}
|
||||
|
||||
int msi_domain_prepare_irqs(struct irq_domain *domain, struct device *dev,
|
||||
int nvec, msi_alloc_info_t *arg)
|
||||
static int msi_domain_prepare_irqs(struct irq_domain *domain, struct device *dev,
|
||||
int nvec, msi_alloc_info_t *arg)
|
||||
{
|
||||
struct msi_domain_info *info = domain->host_data;
|
||||
struct msi_domain_ops *ops = info->ops;
|
||||
@ -1097,77 +1097,6 @@ int msi_domain_prepare_irqs(struct irq_domain *domain, struct device *dev,
|
||||
return ops->msi_prepare(domain, dev, nvec, arg);
|
||||
}
|
||||
|
||||
int msi_domain_populate_irqs(struct irq_domain *domain, struct device *dev,
|
||||
int virq_base, int nvec, msi_alloc_info_t *arg)
|
||||
{
|
||||
struct msi_domain_info *info = domain->host_data;
|
||||
struct msi_domain_ops *ops = info->ops;
|
||||
struct msi_ctrl ctrl = {
|
||||
.domid = MSI_DEFAULT_DOMAIN,
|
||||
.first = virq_base,
|
||||
.last = virq_base + nvec - 1,
|
||||
};
|
||||
struct msi_desc *desc;
|
||||
struct xarray *xa;
|
||||
int ret, virq;
|
||||
|
||||
msi_lock_descs(dev);
|
||||
|
||||
if (!msi_ctrl_valid(dev, &ctrl)) {
|
||||
ret = -EINVAL;
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
ret = msi_domain_add_simple_msi_descs(dev, &ctrl);
|
||||
if (ret)
|
||||
goto unlock;
|
||||
|
||||
xa = &dev->msi.data->__domains[ctrl.domid].store;
|
||||
|
||||
for (virq = virq_base; virq < virq_base + nvec; virq++) {
|
||||
desc = xa_load(xa, virq);
|
||||
desc->irq = virq;
|
||||
|
||||
ops->set_desc(arg, desc);
|
||||
ret = irq_domain_alloc_irqs_hierarchy(domain, virq, 1, arg);
|
||||
if (ret)
|
||||
goto fail;
|
||||
|
||||
irq_set_msi_desc(virq, desc);
|
||||
}
|
||||
msi_unlock_descs(dev);
|
||||
return 0;
|
||||
|
||||
fail:
|
||||
for (--virq; virq >= virq_base; virq--) {
|
||||
msi_domain_depopulate_descs(dev, virq, 1);
|
||||
irq_domain_free_irqs_common(domain, virq, 1);
|
||||
}
|
||||
msi_domain_free_descs(dev, &ctrl);
|
||||
unlock:
|
||||
msi_unlock_descs(dev);
|
||||
return ret;
|
||||
}
|
||||
|
||||
void msi_domain_depopulate_descs(struct device *dev, int virq_base, int nvec)
|
||||
{
|
||||
struct msi_ctrl ctrl = {
|
||||
.domid = MSI_DEFAULT_DOMAIN,
|
||||
.first = virq_base,
|
||||
.last = virq_base + nvec - 1,
|
||||
};
|
||||
struct msi_desc *desc;
|
||||
struct xarray *xa;
|
||||
unsigned long idx;
|
||||
|
||||
if (!msi_ctrl_valid(dev, &ctrl))
|
||||
return;
|
||||
|
||||
xa = &dev->msi.data->__domains[ctrl.domid].store;
|
||||
xa_for_each_range(xa, idx, desc, ctrl.first, ctrl.last)
|
||||
desc->irq = 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Carefully check whether the device can use reservation mode. If
|
||||
* reservation mode is enabled then the early activation will assign a
|
||||
|
||||
Loading…
Reference in New Issue
Block a user