1 files changed, 0 insertions, 291 deletions
diff --git a/drivers/pci/host/pcie-altera-msi.c b/drivers/pci/host/pcie-altera-msi.c
deleted file mode 100644
index 025ef7d9a046..000000000000
--- a/drivers/pci/host/pcie-altera-msi.c
+++ /dev/null
@@ -1,291 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Altera PCIe MSI support
- *
- * Author: Ley Foon Tan <[email protected]>
- *
- * Copyright Altera Corporation (C) 2013-2015. All rights reserved
- */
-
-#include <linux/interrupt.h>
-#include <linux/irqchip/chained_irq.h>
-#include <linux/init.h>
-#include <linux/msi.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/of_pci.h>
-#include <linux/pci.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-
-#define MSI_STATUS		0x0
-#define MSI_ERROR		0x4
-#define MSI_INTMASK		0x8
-
-#define MAX_MSI_VECTORS		32
-
-struct altera_msi {
-	DECLARE_BITMAP(used, MAX_MSI_VECTORS);
-	struct mutex		lock;	/* protect "used" bitmap */
-	struct platform_device	*pdev;
-	struct irq_domain	*msi_domain;
-	struct irq_domain	*inner_domain;
-	void __iomem		*csr_base;
-	void __iomem		*vector_base;
-	phys_addr_t		vector_phy;
-	u32			num_of_vectors;
-	int			irq;
-};
-
-static inline void msi_writel(struct altera_msi *msi, const u32 value,
-			      const u32 reg)
-{
-	writel_relaxed(value, msi->csr_base + reg);
-}
-
-static inline u32 msi_readl(struct altera_msi *msi, const u32 reg)
-{
-	return readl_relaxed(msi->csr_base + reg);
-}
-
-static void altera_msi_isr(struct irq_desc *desc)
-{
-	struct irq_chip *chip = irq_desc_get_chip(desc);
-	struct altera_msi *msi;
-	unsigned long status;
-	u32 bit;
-	u32 virq;
-
-	chained_irq_enter(chip, desc);
-	msi = irq_desc_get_handler_data(desc);
-
-	while ((status = msi_readl(msi, MSI_STATUS)) != 0) {
-		for_each_set_bit(bit, &status, msi->num_of_vectors) {
-			/* Dummy read from vector to clear the interrupt */
-			readl_relaxed(msi->vector_base + (bit * sizeof(u32)));
-
-			virq = irq_find_mapping(msi->inner_domain, bit);
-			if (virq)
-				generic_handle_irq(virq);
-			else
-				dev_err(&msi->pdev->dev, "unexpected MSI\n");
-		}
-	}
-
-	chained_irq_exit(chip, desc);
-}
-
-static struct irq_chip altera_msi_irq_chip = {
-	.name = "Altera PCIe MSI",
-	.irq_mask = pci_msi_mask_irq,
-	.irq_unmask = pci_msi_unmask_irq,
-};
-
-static struct msi_domain_info altera_msi_domain_info = {
-	.flags	= (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
-		     MSI_FLAG_PCI_MSIX),
-	.chip	= &altera_msi_irq_chip,
-};
-
-static void altera_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
-{
-	struct altera_msi *msi = irq_data_get_irq_chip_data(data);
-	phys_addr_t addr = msi->vector_phy + (data->hwirq * sizeof(u32));
-
-	msg->address_lo = lower_32_bits(addr);
-	msg->address_hi = upper_32_bits(addr);
-	msg->data = data->hwirq;
-
-	dev_dbg(&msi->pdev->dev, "msi#%d address_hi %#x address_lo %#x\n",
-		(int)data->hwirq, msg->address_hi, msg->address_lo);
-}
-
-static int altera_msi_set_affinity(struct irq_data *irq_data,
-				   const struct cpumask *mask, bool force)
-{
-	 return -EINVAL;
-}
-
-static struct irq_chip altera_msi_bottom_irq_chip = {
-	.name			= "Altera MSI",
-	.irq_compose_msi_msg	= altera_compose_msi_msg,
-	.irq_set_affinity	= altera_msi_set_affinity,
-};
-
-static int altera_irq_domain_alloc(struct irq_domain *domain, unsigned int virq,
-				   unsigned int nr_irqs, void *args)
-{
-	struct altera_msi *msi = domain->host_data;
-	unsigned long bit;
-	u32 mask;
-
-	WARN_ON(nr_irqs != 1);
-	mutex_lock(&msi->lock);
-
-	bit = find_first_zero_bit(msi->used, msi->num_of_vectors);
-	if (bit >= msi->num_of_vectors) {
-		mutex_unlock(&msi->lock);
-		return -ENOSPC;
-	}
-
-	set_bit(bit, msi->used);
-
-	mutex_unlock(&msi->lock);
-
-	irq_domain_set_info(domain, virq, bit, &altera_msi_bottom_irq_chip,
-			    domain->host_data, handle_simple_irq,
-			    NULL, NULL);
-
-	mask = msi_readl(msi, MSI_INTMASK);
-	mask |= 1 << bit;
-	msi_writel(msi, mask, MSI_INTMASK);
-
-	return 0;
-}
-
-static void altera_irq_domain_free(struct irq_domain *domain,
-				   unsigned int virq, unsigned int nr_irqs)
-{
-	struct irq_data *d = irq_domain_get_irq_data(domain, virq);
-	struct altera_msi *msi = irq_data_get_irq_chip_data(d);
-	u32 mask;
-
-	mutex_lock(&msi->lock);
-
-	if (!test_bit(d->hwirq, msi->used)) {
-		dev_err(&msi->pdev->dev, "trying to free unused MSI#%lu\n",
-			d->hwirq);
-	} else {
-		__clear_bit(d->hwirq, msi->used);
-		mask = msi_readl(msi, MSI_INTMASK);
-		mask &= ~(1 << d->hwirq);
-		msi_writel(msi, mask, MSI_INTMASK);
-	}
-
-	mutex_unlock(&msi->lock);
-}
-
-static const struct irq_domain_ops msi_domain_ops = {
-	.alloc	= altera_irq_domain_alloc,
-	.free	= altera_irq_domain_free,
-};
-
-static int altera_allocate_domains(struct altera_msi *msi)
-{
-	struct fwnode_handle *fwnode = of_node_to_fwnode(msi->pdev->dev.of_node);
-
-	msi->inner_domain = irq_domain_add_linear(NULL, msi->num_of_vectors,
-					     &msi_domain_ops, msi);
-	if (!msi->inner_domain) {
-		dev_err(&msi->pdev->dev, "failed to create IRQ domain\n");
-		return -ENOMEM;
-	}
-
-	msi->msi_domain = pci_msi_create_irq_domain(fwnode,
-				&altera_msi_domain_info, msi->inner_domain);
-	if (!msi->msi_domain) {
-		dev_err(&msi->pdev->dev, "failed to create MSI domain\n");
-		irq_domain_remove(msi->inner_domain);
-		return -ENOMEM;
-	}
-
-	return 0;
-}
-
-static void altera_free_domains(struct altera_msi *msi)
-{
-	irq_domain_remove(msi->msi_domain);
-	irq_domain_remove(msi->inner_domain);
-}
-
-static int altera_msi_remove(struct platform_device *pdev)
-{
-	struct altera_msi *msi = platform_get_drvdata(pdev);
-
-	msi_writel(msi, 0, MSI_INTMASK);
-	irq_set_chained_handler(msi->irq, NULL);
-	irq_set_handler_data(msi->irq, NULL);
-
-	altera_free_domains(msi);
-
-	platform_set_drvdata(pdev, NULL);
-	return 0;
-}
-
-static int altera_msi_probe(struct platform_device *pdev)
-{
-	struct altera_msi *msi;
-	struct device_node *np = pdev->dev.of_node;
-	struct resource *res;
-	int ret;
-
-	msi = devm_kzalloc(&pdev->dev, sizeof(struct altera_msi),
-			   GFP_KERNEL);
-	if (!msi)
-		return -ENOMEM;
-
-	mutex_init(&msi->lock);
-	msi->pdev = pdev;
-
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "csr");
-	msi->csr_base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(msi->csr_base)) {
-		dev_err(&pdev->dev, "failed to map csr memory\n");
-		return PTR_ERR(msi->csr_base);
-	}
-
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-					   "vector_slave");
-	msi->vector_base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(msi->vector_base)) {
-		dev_err(&pdev->dev, "failed to map vector_slave memory\n");
-		return PTR_ERR(msi->vector_base);
-	}
-
-	msi->vector_phy = res->start;
-
-	if (of_property_read_u32(np, "num-vectors", &msi->num_of_vectors)) {
-		dev_err(&pdev->dev, "failed to parse the number of vectors\n");
-		return -EINVAL;
-	}
-
-	ret = altera_allocate_domains(msi);
-	if (ret)
-		return ret;
-
-	msi->irq = platform_get_irq(pdev, 0);
-	if (msi->irq < 0) {
-		dev_err(&pdev->dev, "failed to map IRQ: %d\n", msi->irq);
-		ret = msi->irq;
-		goto err;
-	}
-
-	irq_set_chained_handler_and_data(msi->irq, altera_msi_isr, msi);
-	platform_set_drvdata(pdev, msi);
-
-	return 0;
-
-err:
-	altera_msi_remove(pdev);
-	return ret;
-}
-
-static const struct of_device_id altera_msi_of_match[] = {
-	{ .compatible = "altr,msi-1.0", NULL },
-	{ },
-};
-
-static struct platform_driver altera_msi_driver = {
-	.driver = {
-		.name = "altera-msi",
-		.of_match_table = altera_msi_of_match,
-	},
-	.probe = altera_msi_probe,
-	.remove = altera_msi_remove,
-};
-
-static int __init altera_msi_init(void)
-{
-	return platform_driver_register(&altera_msi_driver);
-}
-subsys_initcall(altera_msi_init);