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authorBjorn Helgaas <bhelgaas@google.com>2017-11-22 17:13:37 -0500
committerThomas Gleixner <tglx@linutronix.de>2017-11-23 14:18:18 -0500
commitfd2fa6c18b729e19c51240453a521f76c766247e (patch)
tree0b7e6579c27e997dfb74c88a1bfa66f19daf0766
parente2a5dca753d1cdc3212519023ed8a13e13f5495b (diff)
x86/PCI: Remove unused HyperTransport interrupt support
There are no in-tree callers of ht_create_irq(), the driver interface for HyperTransport interrupts, left. Remove the unused entry point and all the supporting code. See 8b955b0dddb3 ("[PATCH] Initial generic hypertransport interrupt support"). Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: linux-pci@vger.kernel.org Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Link: https://lkml.kernel.org/r/20171122221337.3877.23362.stgit@bhelgaas-glaptop.roam.corp.google.com
Diffstat
-rw-r--r--arch/x86/include/asm/hw_irq.h8
-rw-r--r--arch/x86/include/asm/hypertransport.h46
-rw-r--r--arch/x86/include/asm/irqdomain.h6
-rw-r--r--arch/x86/kernel/apic/Makefile1
-rw-r--r--arch/x86/kernel/apic/htirq.c198
-rw-r--r--arch/x86/kernel/apic/vector.c5
-rw-r--r--drivers/pci/Kconfig9
-rw-r--r--drivers/pci/Makefile3
-rw-r--r--drivers/pci/htirq.c135
-rw-r--r--include/linux/htirq.h39
-rw-r--r--include/linux/pci.h6
11 files changed, 2 insertions, 454 deletions
diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index b80e46733909..2851077b6051 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -99,14 +99,6 @@ struct irq_alloc_info {
99 void *dmar_data; 99 void *dmar_data;
100 }; 100 };
101#endif 101#endif
102#ifdef CONFIG_HT_IRQ
103 struct {
104 int ht_pos;
105 int ht_idx;
106 struct pci_dev *ht_dev;
107 void *ht_update;
108 };
109#endif
110#ifdef CONFIG_X86_UV 102#ifdef CONFIG_X86_UV
111 struct { 103 struct {
112 int uv_limit; 104 int uv_limit;
diff --git a/arch/x86/include/asm/hypertransport.h b/arch/x86/include/asm/hypertransport.h
deleted file mode 100644
index 5d55df352879..000000000000
--- a/arch/x86/include/asm/hypertransport.h
+++ /dev/null
@@ -1,46 +0,0 @@
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_HYPERTRANSPORT_H
3#define _ASM_X86_HYPERTRANSPORT_H
4
5/*
6 * Constants for x86 Hypertransport Interrupts.
7 */
8
9#define HT_IRQ_LOW_BASE 0xf8000000
10
11#define HT_IRQ_LOW_VECTOR_SHIFT 16
12#define HT_IRQ_LOW_VECTOR_MASK 0x00ff0000
13#define HT_IRQ_LOW_VECTOR(v) \
14 (((v) << HT_IRQ_LOW_VECTOR_SHIFT) & HT_IRQ_LOW_VECTOR_MASK)
15
16#define HT_IRQ_LOW_DEST_ID_SHIFT 8
17#define HT_IRQ_LOW_DEST_ID_MASK 0x0000ff00
18#define HT_IRQ_LOW_DEST_ID(v) \
19 (((v) << HT_IRQ_LOW_DEST_ID_SHIFT) & HT_IRQ_LOW_DEST_ID_MASK)
20
21#define HT_IRQ_LOW_DM_PHYSICAL 0x0000000
22#define HT_IRQ_LOW_DM_LOGICAL 0x0000040
23
24#define HT_IRQ_LOW_RQEOI_EDGE 0x0000000
25#define HT_IRQ_LOW_RQEOI_LEVEL 0x0000020
26
27
28#define HT_IRQ_LOW_MT_FIXED 0x0000000
29#define HT_IRQ_LOW_MT_ARBITRATED 0x0000004
30#define HT_IRQ_LOW_MT_SMI 0x0000008
31#define HT_IRQ_LOW_MT_NMI 0x000000c
32#define HT_IRQ_LOW_MT_INIT 0x0000010
33#define HT_IRQ_LOW_MT_STARTUP 0x0000014
34#define HT_IRQ_LOW_MT_EXTINT 0x0000018
35#define HT_IRQ_LOW_MT_LINT1 0x000008c
36#define HT_IRQ_LOW_MT_LINT0 0x0000098
37
38#define HT_IRQ_LOW_IRQ_MASKED 0x0000001
39
40
41#define HT_IRQ_HIGH_DEST_ID_SHIFT 0
42#define HT_IRQ_HIGH_DEST_ID_MASK 0x00ffffff
43#define HT_IRQ_HIGH_DEST_ID(v) \
44 ((((v) >> 8) << HT_IRQ_HIGH_DEST_ID_SHIFT) & HT_IRQ_HIGH_DEST_ID_MASK)
45
46#endif /* _ASM_X86_HYPERTRANSPORT_H */
diff --git a/arch/x86/include/asm/irqdomain.h b/arch/x86/include/asm/irqdomain.h
index f695cc6b8e1f..139feef467f7 100644
--- a/arch/x86/include/asm/irqdomain.h
+++ b/arch/x86/include/asm/irqdomain.h
@@ -56,10 +56,4 @@ extern void arch_init_msi_domain(struct irq_domain *domain);
56static inline void arch_init_msi_domain(struct irq_domain *domain) { } 56static inline void arch_init_msi_domain(struct irq_domain *domain) { }
57#endif 57#endif
58 58
59#ifdef CONFIG_HT_IRQ
60extern void arch_init_htirq_domain(struct irq_domain *domain);
61#else
62static inline void arch_init_htirq_domain(struct irq_domain *domain) { }
63#endif
64
65#endif 59#endif
diff --git a/arch/x86/kernel/apic/Makefile b/arch/x86/kernel/apic/Makefile
index a9e08924927e..a6fcaf16cdbf 100644
--- a/arch/x86/kernel/apic/Makefile
+++ b/arch/x86/kernel/apic/Makefile
@@ -12,7 +12,6 @@ obj-y += hw_nmi.o
12 12
13obj-$(CONFIG_X86_IO_APIC) += io_apic.o 13obj-$(CONFIG_X86_IO_APIC) += io_apic.o
14obj-$(CONFIG_PCI_MSI) += msi.o 14obj-$(CONFIG_PCI_MSI) += msi.o
15obj-$(CONFIG_HT_IRQ) += htirq.o
16obj-$(CONFIG_SMP) += ipi.o 15obj-$(CONFIG_SMP) += ipi.o
17 16
18ifeq ($(CONFIG_X86_64),y) 17ifeq ($(CONFIG_X86_64),y)
diff --git a/arch/x86/kernel/apic/htirq.c b/arch/x86/kernel/apic/htirq.c
deleted file mode 100644
index b07075dce8b7..000000000000
--- a/arch/x86/kernel/apic/htirq.c
+++ /dev/null
@@ -1,198 +0,0 @@
1/*
2 * Support Hypertransport IRQ
3 *
4 * Copyright (C) 1997, 1998, 1999, 2000, 2009 Ingo Molnar, Hajnalka Szabo
5 * Moved from arch/x86/kernel/apic/io_apic.c.
6 * Jiang Liu <jiang.liu@linux.intel.com>
7 * Add support of hierarchical irqdomain
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13#include <linux/mm.h>
14#include <linux/interrupt.h>
15#include <linux/init.h>
16#include <linux/device.h>
17#include <linux/pci.h>
18#include <linux/htirq.h>
19#include <asm/irqdomain.h>
20#include <asm/hw_irq.h>
21#include <asm/apic.h>
22#include <asm/hypertransport.h>
23
24static struct irq_domain *htirq_domain;
25
26/*
27 * Hypertransport interrupt support
28 */
29static int
30ht_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force)
31{
32 struct irq_data *parent = data->parent_data;
33 int ret;
34
35 ret = parent->chip->irq_set_affinity(parent, mask, force);
36 if (ret >= 0) {
37 struct ht_irq_msg msg;
38 struct irq_cfg *cfg = irqd_cfg(data);
39
40 fetch_ht_irq_msg(data->irq, &msg);
41 msg.address_lo &= ~(HT_IRQ_LOW_VECTOR_MASK |
42 HT_IRQ_LOW_DEST_ID_MASK);
43 msg.address_lo |= HT_IRQ_LOW_VECTOR(cfg->vector) |
44 HT_IRQ_LOW_DEST_ID(cfg->dest_apicid);
45 msg.address_hi &= ~(HT_IRQ_HIGH_DEST_ID_MASK);
46 msg.address_hi |= HT_IRQ_HIGH_DEST_ID(cfg->dest_apicid);
47 write_ht_irq_msg(data->irq, &msg);
48 }
49
50 return ret;
51}
52
53static struct irq_chip ht_irq_chip = {
54 .name = "PCI-HT",
55 .irq_mask = mask_ht_irq,
56 .irq_unmask = unmask_ht_irq,
57 .irq_ack = irq_chip_ack_parent,
58 .irq_set_affinity = ht_set_affinity,
59 .irq_retrigger = irq_chip_retrigger_hierarchy,
60 .flags = IRQCHIP_SKIP_SET_WAKE,
61};
62
63static int htirq_domain_alloc(struct irq_domain *domain, unsigned int virq,
64 unsigned int nr_irqs, void *arg)
65{
66 struct ht_irq_cfg *ht_cfg;
67 struct irq_alloc_info *info = arg;
68 struct pci_dev *dev;
69 irq_hw_number_t hwirq;
70 int ret;
71
72 if (nr_irqs > 1 || !info)
73 return -EINVAL;
74
75 dev = info->ht_dev;
76 hwirq = (info->ht_idx & 0xFF) |
77 PCI_DEVID(dev->bus->number, dev->devfn) << 8 |
78 (pci_domain_nr(dev->bus) & 0xFFFFFFFF) << 24;
79 if (irq_find_mapping(domain, hwirq) > 0)
80 return -EEXIST;
81
82 ht_cfg = kmalloc(sizeof(*ht_cfg), GFP_KERNEL);
83 if (!ht_cfg)
84 return -ENOMEM;
85
86 ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, info);
87 if (ret < 0) {
88 kfree(ht_cfg);
89 return ret;
90 }
91
92 /* Initialize msg to a value that will never match the first write. */
93 ht_cfg->msg.address_lo = 0xffffffff;
94 ht_cfg->msg.address_hi = 0xffffffff;
95 ht_cfg->dev = info->ht_dev;
96 ht_cfg->update = info->ht_update;
97 ht_cfg->pos = info->ht_pos;
98 ht_cfg->idx = 0x10 + (info->ht_idx * 2);
99 irq_domain_set_info(domain, virq, hwirq, &ht_irq_chip, ht_cfg,
100 handle_edge_irq, ht_cfg, "edge");
101
102 return 0;
103}
104
105static void htirq_domain_free(struct irq_domain *domain, unsigned int virq,
106 unsigned int nr_irqs)
107{
108 struct irq_data *irq_data = irq_domain_get_irq_data(domain, virq);
109
110 BUG_ON(nr_irqs != 1);
111 kfree(irq_data->chip_data);
112 irq_domain_free_irqs_top(domain, virq, nr_irqs);
113}
114
115static int htirq_domain_activate(struct irq_domain *domain,
116 struct irq_data *irq_data, bool early)
117{
118 struct ht_irq_msg msg;
119 struct irq_cfg *cfg = irqd_cfg(irq_data);
120
121 msg.address_hi = HT_IRQ_HIGH_DEST_ID(cfg->dest_apicid);
122 msg.address_lo =
123 HT_IRQ_LOW_BASE |
124 HT_IRQ_LOW_DEST_ID(cfg->dest_apicid) |
125 HT_IRQ_LOW_VECTOR(cfg->vector) |
126 ((apic->irq_dest_mode == 0) ?
127 HT_IRQ_LOW_DM_PHYSICAL :
128 HT_IRQ_LOW_DM_LOGICAL) |
129 HT_IRQ_LOW_RQEOI_EDGE |
130 ((apic->irq_delivery_mode != dest_LowestPrio) ?
131 HT_IRQ_LOW_MT_FIXED :
132 HT_IRQ_LOW_MT_ARBITRATED) |
133 HT_IRQ_LOW_IRQ_MASKED;
134 write_ht_irq_msg(irq_data->irq, &msg);
135 return 0;
136}
137
138static void htirq_domain_deactivate(struct irq_domain *domain,
139 struct irq_data *irq_data)
140{
141 struct ht_irq_msg msg;
142
143 memset(&msg, 0, sizeof(msg));
144 write_ht_irq_msg(irq_data->irq, &msg);
145}
146
147static const struct irq_domain_ops htirq_domain_ops = {
148 .alloc = htirq_domain_alloc,
149 .free = htirq_domain_free,
150 .activate = htirq_domain_activate,
151 .deactivate = htirq_domain_deactivate,
152};
153
154void __init arch_init_htirq_domain(struct irq_domain *parent)
155{
156 struct fwnode_handle *fn;
157
158 if (disable_apic)
159 return;
160
161 fn = irq_domain_alloc_named_fwnode("PCI-HT");
162 if (!fn)
163 goto warn;
164
165 htirq_domain = irq_domain_create_tree(fn, &htirq_domain_ops, NULL);
166 irq_domain_free_fwnode(fn);
167 if (!htirq_domain)
168 goto warn;
169
170 htirq_domain->parent = parent;
171 return;
172
173warn:
174 pr_warn("Failed to initialize irqdomain for HTIRQ.\n");
175}
176
177int arch_setup_ht_irq(int idx, int pos, struct pci_dev *dev,
178 ht_irq_update_t *update)
179{
180 struct irq_alloc_info info;
181
182 if (!htirq_domain)
183 return -ENOSYS;
184
185 init_irq_alloc_info(&info, NULL);
186 info.ht_idx = idx;
187 info.ht_pos = pos;
188 info.ht_dev = dev;
189 info.ht_update = update;
190
191 return irq_domain_alloc_irqs(htirq_domain, 1, dev_to_node(&dev->dev),
192 &info);
193}
194
195void arch_teardown_ht_irq(unsigned int irq)
196{
197 irq_domain_free_irqs(irq, 1);
198}
diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
index 05c85e693a5d..6a823a25eaff 100644
--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -1,5 +1,5 @@
1/* 1/*
2 * Local APIC related interfaces to support IOAPIC, MSI, HT_IRQ etc. 2 * Local APIC related interfaces to support IOAPIC, MSI, etc.
3 * 3 *
4 * Copyright (C) 1997, 1998, 1999, 2000, 2009 Ingo Molnar, Hajnalka Szabo 4 * Copyright (C) 1997, 1998, 1999, 2000, 2009 Ingo Molnar, Hajnalka Szabo
5 * Moved from arch/x86/kernel/apic/io_apic.c. 5 * Moved from arch/x86/kernel/apic/io_apic.c.
@@ -601,7 +601,7 @@ int __init arch_probe_nr_irqs(void)
601 nr_irqs = NR_VECTORS * nr_cpu_ids; 601 nr_irqs = NR_VECTORS * nr_cpu_ids;
602 602
603 nr = (gsi_top + nr_legacy_irqs()) + 8 * nr_cpu_ids; 603 nr = (gsi_top + nr_legacy_irqs()) + 8 * nr_cpu_ids;
604#if defined(CONFIG_PCI_MSI) || defined(CONFIG_HT_IRQ) 604#if defined(CONFIG_PCI_MSI)
605 /* 605 /*
606 * for MSI and HT dyn irq 606 * for MSI and HT dyn irq
607 */ 607 */
@@ -663,7 +663,6 @@ int __init arch_early_irq_init(void)
663 irq_set_default_host(x86_vector_domain); 663 irq_set_default_host(x86_vector_domain);
664 664
665 arch_init_msi_domain(x86_vector_domain); 665 arch_init_msi_domain(x86_vector_domain);
666 arch_init_htirq_domain(x86_vector_domain);
667 666
668 BUG_ON(!alloc_cpumask_var(&vector_searchmask, GFP_KERNEL)); 667 BUG_ON(!alloc_cpumask_var(&vector_searchmask, GFP_KERNEL));
669 668
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index c32a77fc8b03..99ae5e30eabe 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -71,15 +71,6 @@ config XEN_PCIDEV_FRONTEND
71 The PCI device frontend driver allows the kernel to import arbitrary 71 The PCI device frontend driver allows the kernel to import arbitrary
72 PCI devices from a PCI backend to support PCI driver domains. 72 PCI devices from a PCI backend to support PCI driver domains.
73 73
74config HT_IRQ
75 bool "Interrupts on hypertransport devices"
76 default y
77 depends on PCI && X86_LOCAL_APIC
78 help
79 This allows native hypertransport devices to use interrupts.
80
81 If unsure say Y.
82
83config PCI_ATS 74config PCI_ATS
84 bool 75 bool
85 76
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index 80adbdbcecce..ab0104e0ffac 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -24,9 +24,6 @@ endif
24# Build the PCI MSI interrupt support 24# Build the PCI MSI interrupt support
25obj-$(CONFIG_PCI_MSI) += msi.o 25obj-$(CONFIG_PCI_MSI) += msi.o
26 26
27# Build the Hypertransport interrupt support
28obj-$(CONFIG_HT_IRQ) += htirq.o
29
30obj-$(CONFIG_PCI_ATS) += ats.o 27obj-$(CONFIG_PCI_ATS) += ats.o
31obj-$(CONFIG_PCI_IOV) += iov.o 28obj-$(CONFIG_PCI_IOV) += iov.o
32 29
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 @@
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * File: htirq.c
4 * Purpose: Hypertransport Interrupt Capability
5 *
6 * Copyright (C) 2006 Linux Networx
7 * Copyright (C) Eric Biederman <ebiederman@lnxi.com>
8 */
9
10#include <linux/irq.h>
11#include <linux/pci.h>
12#include <linux/spinlock.h>
13#include <linux/export.h>
14#include <linux/slab.h>
15#include <linux/htirq.h>
16
17/* Global ht irq lock.
18 *
19 * This is needed to serialize access to the data port in hypertransport
20 * irq capability.
21 *
22 * With multiple simultaneous hypertransport irq devices it might pay
23 * to make this more fine grained. But start with simple, stupid, and correct.
24 */
25static DEFINE_SPINLOCK(ht_irq_lock);
26
27void write_ht_irq_msg(unsigned int irq, struct ht_irq_msg *msg)
28{
29 struct ht_irq_cfg *cfg = irq_get_handler_data(irq);
30 unsigned long flags;
31
32 spin_lock_irqsave(&ht_irq_lock, flags);
33 if (cfg->msg.address_lo != msg->address_lo) {
34 pci_write_config_byte(cfg->dev, cfg->pos + 2, cfg->idx);
35 pci_write_config_dword(cfg->dev, cfg->pos + 4, msg->address_lo);
36 }
37 if (cfg->msg.address_hi != msg->address_hi) {
38 pci_write_config_byte(cfg->dev, cfg->pos + 2, cfg->idx + 1);
39 pci_write_config_dword(cfg->dev, cfg->pos + 4, msg->address_hi);
40 }
41 if (cfg->update)
42 cfg->update(cfg->dev, irq, msg);
43 spin_unlock_irqrestore(&ht_irq_lock, flags);
44 cfg->msg = *msg;
45}
46
47void fetch_ht_irq_msg(unsigned int irq, struct ht_irq_msg *msg)
48{
49 struct ht_irq_cfg *cfg = irq_get_handler_data(irq);
50
51 *msg = cfg->msg;
52}
53
54void mask_ht_irq(struct irq_data *data)
55{
56 struct ht_irq_cfg *cfg = irq_data_get_irq_handler_data(data);
57 struct ht_irq_msg msg = cfg->msg;
58
59 msg.address_lo |= 1;
60 write_ht_irq_msg(data->irq, &msg);
61}
62
63void unmask_ht_irq(struct irq_data *data)
64{
65 struct ht_irq_cfg *cfg = irq_data_get_irq_handler_data(data);
66 struct ht_irq_msg msg = cfg->msg;
67
68 msg.address_lo &= ~1;
69 write_ht_irq_msg(data->irq, &msg);
70}
71
72/**
73 * __ht_create_irq - create an irq and attach it to a device.
74 * @dev: The hypertransport device to find the irq capability on.
75 * @idx: Which of the possible irqs to attach to.
76 * @update: Function to be called when changing the htirq message
77 *
78 * The irq number of the new irq or a negative error value is returned.
79 */
80int __ht_create_irq(struct pci_dev *dev, int idx, ht_irq_update_t *update)
81{
82 int max_irq, pos, irq;
83 unsigned long flags;
84 u32 data;
85
86 pos = pci_find_ht_capability(dev, HT_CAPTYPE_IRQ);
87 if (!pos)
88 return -EINVAL;
89
90 /* Verify the idx I want to use is in range */
91 spin_lock_irqsave(&ht_irq_lock, flags);
92 pci_write_config_byte(dev, pos + 2, 1);
93 pci_read_config_dword(dev, pos + 4, &data);
94 spin_unlock_irqrestore(&ht_irq_lock, flags);
95
96 max_irq = (data >> 16) & 0xff;
97 if (idx > max_irq)
98 return -EINVAL;
99
100 irq = arch_setup_ht_irq(idx, pos, dev, update);
101 if (irq > 0)
102 dev_dbg(&dev->dev, "irq %d for HT\n", irq);
103
104 return irq;
105}
106EXPORT_SYMBOL(__ht_create_irq);
107
108/**
109 * ht_create_irq - create an irq and attach it to a device.
110 * @dev: The hypertransport device to find the irq capability on.
111 * @idx: Which of the possible irqs to attach to.
112 *
113 * ht_create_irq needs to be called for all hypertransport devices
114 * that generate irqs.
115 *
116 * The irq number of the new irq or a negative error value is returned.
117 */
118int ht_create_irq(struct pci_dev *dev, int idx)
119{
120 return __ht_create_irq(dev, idx, NULL);
121}
122EXPORT_SYMBOL(ht_create_irq);
123
124/**
125 * ht_destroy_irq - destroy an irq created with ht_create_irq
126 * @irq: irq to be destroyed
127 *
128 * This reverses ht_create_irq removing the specified irq from
129 * existence. The irq should be free before this happens.
130 */
131void ht_destroy_irq(unsigned int irq)
132{
133 arch_teardown_ht_irq(irq);
134}
135EXPORT_SYMBOL(ht_destroy_irq);
diff --git a/include/linux/htirq.h b/include/linux/htirq.h
deleted file mode 100644
index 127c39d815ba..000000000000
--- a/include/linux/htirq.h
+++ /dev/null
@@ -1,39 +0,0 @@
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef LINUX_HTIRQ_H
3#define LINUX_HTIRQ_H
4
5struct pci_dev;
6struct irq_data;
7
8struct ht_irq_msg {
9 u32 address_lo; /* low 32 bits of the ht irq message */
10 u32 address_hi; /* high 32 bits of the it irq message */
11};
12
13typedef void (ht_irq_update_t)(struct pci_dev *dev, int irq,
14 struct ht_irq_msg *msg);
15
16struct ht_irq_cfg {
17 struct pci_dev *dev;
18 /* Update callback used to cope with buggy hardware */
19 ht_irq_update_t *update;
20 unsigned pos;
21 unsigned idx;
22 struct ht_irq_msg msg;
23};
24
25/* Helper functions.. */
26void fetch_ht_irq_msg(unsigned int irq, struct ht_irq_msg *msg);
27void write_ht_irq_msg(unsigned int irq, struct ht_irq_msg *msg);
28void mask_ht_irq(struct irq_data *data);
29void unmask_ht_irq(struct irq_data *data);
30
31/* The arch hook for getting things started */
32int arch_setup_ht_irq(int idx, int pos, struct pci_dev *dev,
33 ht_irq_update_t *update);
34void arch_teardown_ht_irq(unsigned int irq);
35
36/* For drivers of buggy hardware */
37int __ht_create_irq(struct pci_dev *dev, int idx, ht_irq_update_t *update);
38
39#endif /* LINUX_HTIRQ_H */
diff --git a/include/linux/pci.h b/include/linux/pci.h
index d16a7c037ec0..16287684dfe8 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1484,12 +1484,6 @@ static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { }
1484static inline void pcie_ecrc_get_policy(char *str) { } 1484static inline void pcie_ecrc_get_policy(char *str) { }
1485#endif 1485#endif
1486 1486
1487#ifdef CONFIG_HT_IRQ
1488/* The functions a driver should call */
1489int ht_create_irq(struct pci_dev *dev, int idx);
1490void ht_destroy_irq(unsigned int irq);
1491#endif /* CONFIG_HT_IRQ */
1492
1493#ifdef CONFIG_PCI_ATS 1487#ifdef CONFIG_PCI_ATS
1494/* Address Translation Service */ 1488/* Address Translation Service */
1495void pci_ats_init(struct pci_dev *dev); 1489void pci_ats_init(struct pci_dev *dev);
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-26 11:47:32 -0500