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path: root/drivers/pci/htirq.c
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Diffstat (limited to 'drivers/pci/htirq.c')
-rw-r--r--drivers/pci/htirq.c135
1 files changed, 0 insertions, 135 deletions
diff --git a/drivers/pci/htirq.c b/drivers/pci/htirq.c
deleted file mode 100644
index bb88c26f5144..000000000000
--- a/drivers/pci/htirq.c
+++ /dev/null
@@ -1,135 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * File: htirq.c
- * Purpose: Hypertransport Interrupt Capability
- *
- * Copyright (C) 2006 Linux Networx
- * Copyright (C) Eric Biederman <ebiederman@lnxi.com>
- */
-
-#include <linux/irq.h>
-#include <linux/pci.h>
-#include <linux/spinlock.h>
-#include <linux/export.h>
-#include <linux/slab.h>
-#include <linux/htirq.h>
-
-/* Global ht irq lock.
- *
- * This is needed to serialize access to the data port in hypertransport
- * irq capability.
- *
- * With multiple simultaneous hypertransport irq devices it might pay
- * to make this more fine grained. But start with simple, stupid, and correct.
- */
-static DEFINE_SPINLOCK(ht_irq_lock);
-
-void write_ht_irq_msg(unsigned int irq, struct ht_irq_msg *msg)
-{
- struct ht_irq_cfg *cfg = irq_get_handler_data(irq);
- unsigned long flags;
-
- spin_lock_irqsave(&ht_irq_lock, flags);
- if (cfg->msg.address_lo != msg->address_lo) {
- pci_write_config_byte(cfg->dev, cfg->pos + 2, cfg->idx);
- pci_write_config_dword(cfg->dev, cfg->pos + 4, msg->address_lo);
- }
- if (cfg->msg.address_hi != msg->address_hi) {
- pci_write_config_byte(cfg->dev, cfg->pos + 2, cfg->idx + 1);
- pci_write_config_dword(cfg->dev, cfg->pos + 4, msg->address_hi);
- }
- if (cfg->update)
- cfg->update(cfg->dev, irq, msg);
- spin_unlock_irqrestore(&ht_irq_lock, flags);
- cfg->msg = *msg;
-}
-
-void fetch_ht_irq_msg(unsigned int irq, struct ht_irq_msg *msg)
-{
- struct ht_irq_cfg *cfg = irq_get_handler_data(irq);
-
- *msg = cfg->msg;
-}
-
-void mask_ht_irq(struct irq_data *data)
-{
- struct ht_irq_cfg *cfg = irq_data_get_irq_handler_data(data);
- struct ht_irq_msg msg = cfg->msg;
-
- msg.address_lo |= 1;
- write_ht_irq_msg(data->irq, &msg);
-}
-
-void unmask_ht_irq(struct irq_data *data)
-{
- struct ht_irq_cfg *cfg = irq_data_get_irq_handler_data(data);
- struct ht_irq_msg msg = cfg->msg;
-
- msg.address_lo &= ~1;
- write_ht_irq_msg(data->irq, &msg);
-}
-
-/**
- * __ht_create_irq - create an irq and attach it to a device.
- * @dev: The hypertransport device to find the irq capability on.
- * @idx: Which of the possible irqs to attach to.
- * @update: Function to be called when changing the htirq message
- *
- * The irq number of the new irq or a negative error value is returned.
- */
-int __ht_create_irq(struct pci_dev *dev, int idx, ht_irq_update_t *update)
-{
- int max_irq, pos, irq;
- unsigned long flags;
- u32 data;
-
- pos = pci_find_ht_capability(dev, HT_CAPTYPE_IRQ);
- if (!pos)
- return -EINVAL;
-
- /* Verify the idx I want to use is in range */
- spin_lock_irqsave(&ht_irq_lock, flags);
- pci_write_config_byte(dev, pos + 2, 1);
- pci_read_config_dword(dev, pos + 4, &data);
- spin_unlock_irqrestore(&ht_irq_lock, flags);
-
- max_irq = (data >> 16) & 0xff;
- if (idx > max_irq)
- return -EINVAL;
-
- irq = arch_setup_ht_irq(idx, pos, dev, update);
- if (irq > 0)
- dev_dbg(&dev->dev, "irq %d for HT\n", irq);
-
- return irq;
-}
-EXPORT_SYMBOL(__ht_create_irq);
-
-/**
- * ht_create_irq - create an irq and attach it to a device.
- * @dev: The hypertransport device to find the irq capability on.
- * @idx: Which of the possible irqs to attach to.
- *
- * ht_create_irq needs to be called for all hypertransport devices
- * that generate irqs.
- *
- * The irq number of the new irq or a negative error value is returned.
- */
-int ht_create_irq(struct pci_dev *dev, int idx)
-{
- return __ht_create_irq(dev, idx, NULL);
-}
-EXPORT_SYMBOL(ht_create_irq);
-
-/**
- * ht_destroy_irq - destroy an irq created with ht_create_irq
- * @irq: irq to be destroyed
- *
- * This reverses ht_create_irq removing the specified irq from
- * existence. The irq should be free before this happens.
- */
-void ht_destroy_irq(unsigned int irq)
-{
- arch_teardown_ht_irq(irq);
-}
-EXPORT_SYMBOL(ht_destroy_irq);