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Diffstat (limited to 'drivers/acpi/pci_irq.c')
-rw-r--r--drivers/acpi/pci_irq.c66
1 files changed, 22 insertions, 44 deletions
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index c576a6fe4ebb..ad81aa03fe2f 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* pci_irq.c - ACPI PCI Interrupt Routing ($Revision: 11 $)
*
@@ -6,22 +7,9 @@
* Copyright (C) 2002 Dominik Brodowski <devel@brodo.de>
* (c) Copyright 2008 Hewlett-Packard Development Company, L.P.
* Bjorn Helgaas <bjorn.helgaas@hp.com>
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or (at
- * your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
+#define pr_fmt(fmt) "ACPI: PCI: " fmt
#include <linux/dmi.h>
#include <linux/kernel.h>
@@ -34,11 +22,7 @@
#include <linux/acpi.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
-
-#define PREFIX "ACPI: "
-
-#define _COMPONENT ACPI_PCI_COMPONENT
-ACPI_MODULE_NAME("pci_irq");
+#include <linux/string_choices.h>
struct acpi_prt_entry {
struct acpi_pci_id id;
@@ -139,7 +123,7 @@ static void do_prt_fixups(struct acpi_prt_entry *entry,
entry->pin == quirk->pin &&
!strcmp(prt->source, quirk->source) &&
strlen(prt->source) >= strlen(quirk->actual_source)) {
- printk(KERN_WARNING PREFIX "firmware reports "
+ pr_warn("Firmware reports "
"%04x:%02x:%02x PCI INT %c connected to %s; "
"changing to %s\n",
entry->id.segment, entry->id.bus,
@@ -188,7 +172,7 @@ static int acpi_pci_irq_check_entry(acpi_handle handle, struct pci_dev *dev,
* configure the IRQ assigned to this slot|dev|pin. The 'source_index'
* indicates which resource descriptor in the resource template (of
* the link device) this interrupt is allocated from.
- *
+ *
* NOTE: Don't query the Link Device for IRQ information at this time
* because Link Device enumeration may not have occurred yet
* (e.g. exists somewhere 'below' this _PRT entry in the ACPI
@@ -204,12 +188,9 @@ static int acpi_pci_irq_check_entry(acpi_handle handle, struct pci_dev *dev,
* the IRQ value, which is hardwired to specific interrupt inputs on
* the interrupt controller.
*/
-
- ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO,
- " %04x:%02x:%02x[%c] -> %s[%d]\n",
- entry->id.segment, entry->id.bus,
- entry->id.device, pin_name(entry->pin),
- prt->source, entry->index));
+ pr_debug("%04x:%02x:%02x[%c] -> %s[%d]\n",
+ entry->id.segment, entry->id.bus, entry->id.device,
+ pin_name(entry->pin), prt->source, entry->index);
*entry_ptr = entry;
@@ -308,7 +289,7 @@ static int acpi_reroute_boot_interrupt(struct pci_dev *dev,
}
#endif /* CONFIG_X86_IO_APIC */
-static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin)
+struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin)
{
struct acpi_prt_entry *entry = NULL;
struct pci_dev *bridge;
@@ -320,8 +301,7 @@ static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin)
#ifdef CONFIG_X86_IO_APIC
acpi_reroute_boot_interrupt(dev, entry);
#endif /* CONFIG_X86_IO_APIC */
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n",
- pci_name(dev), pin_name(pin)));
+ dev_dbg(&dev->dev, "Found [%c] _PRT entry\n", pin_name(pin));
return entry;
}
@@ -337,9 +317,7 @@ static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin)
/* PC card has the same IRQ as its cardbridge */
bridge_pin = bridge->pin;
if (!bridge_pin) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "No interrupt pin configured for device %s\n",
- pci_name(bridge)));
+ dev_dbg(&bridge->dev, "No interrupt pin configured\n");
return NULL;
}
pin = bridge_pin;
@@ -347,10 +325,8 @@ static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin)
ret = acpi_pci_irq_find_prt_entry(bridge, pin, &entry);
if (!ret && entry) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Derived GSI for %s INT %c from %s\n",
- pci_name(dev), pin_name(orig_pin),
- pci_name(bridge)));
+ dev_dbg(&dev->dev, "Derived GSI INT %c from %s\n",
+ pin_name(orig_pin), pci_name(bridge));
return entry;
}
@@ -412,13 +388,15 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
u8 pin;
int triggering = ACPI_LEVEL_SENSITIVE;
/*
- * On ARM systems with the GIC interrupt model, level interrupts
+ * On ARM systems with the GIC interrupt model, or LoongArch
+ * systems with the LPIC interrupt model, level interrupts
* are always polarity high by specification; PCI legacy
* IRQs lines are inverted before reaching the interrupt
* controller and must therefore be considered active high
* as default.
*/
- int polarity = acpi_irq_model == ACPI_IRQ_MODEL_GIC ?
+ int polarity = acpi_irq_model == ACPI_IRQ_MODEL_GIC ||
+ acpi_irq_model == ACPI_IRQ_MODEL_LPIC ?
ACPI_ACTIVE_HIGH : ACPI_ACTIVE_LOW;
char *link = NULL;
char link_desc[16];
@@ -426,9 +404,7 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
pin = dev->pin;
if (!pin) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "No interrupt pin configured for device %s\n",
- pci_name(dev)));
+ dev_dbg(&dev->dev, "No interrupt pin configured\n");
return 0;
}
@@ -462,8 +438,10 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
* No IRQ known to the ACPI subsystem - maybe the BIOS /
* driver reported one, then use it. Exit in any case.
*/
- if (!acpi_pci_irq_valid(dev, pin))
+ if (!acpi_pci_irq_valid(dev, pin)) {
+ kfree(entry);
return 0;
+ }
if (acpi_isa_register_gsi(dev))
dev_warn(&dev->dev, "PCI INT %c: no GSI\n",
@@ -491,7 +469,7 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
dev_dbg(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n",
pin_name(pin), link_desc, gsi,
(triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge",
- (polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq);
+ str_low_high(polarity == ACPI_ACTIVE_LOW), dev->irq);
kfree(entry);
return 0;
generated by cgit (git 2.34.1) at 2025-12-24 21:59:11 +0000