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Date: Mon, 27 Oct 2014 21:22:22 +0800
From: Yijing Wang <wangyijing@...wei.com>
To: Bjorn Helgaas <bhelgaas@...gle.com>
CC: <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
Xinwei Hu <huxinwei@...wei.com>, Wuyun <wuyun.wu@...wei.com>,
<linux-arm-kernel@...ts.infradead.org>,
Russell King <linux@....linux.org.uk>, <x86@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
<xen-devel@...ts.xenproject.org>, Joerg Roedel <joro@...tes.org>,
<iommu@...ts.linux-foundation.org>, <linux-mips@...ux-mips.org>,
"Benjamin Herrenschmidt" <benh@...nel.crashing.org>,
<linuxppc-dev@...ts.ozlabs.org>, <linux-s390@...r.kernel.org>,
Sebastian Ott <sebott@...ux.vnet.ibm.com>,
"Tony Luck" <tony.luck@...el.com>, <linux-ia64@...r.kernel.org>,
"David S. Miller" <davem@...emloft.net>,
<sparclinux@...r.kernel.org>, Chris Metcalf <cmetcalf@...era.com>,
Ralf Baechle <ralf@...ux-mips.org>,
Lucas Stach <l.stach@...gutronix.de>,
David Vrabel <david.vrabel@...rix.com>,
"Sergei Shtylyov" <sergei.shtylyov@...entembedded.com>,
Michael Ellerman <mpe@...erman.id.au>,
Thierry Reding <thierry.reding@...il.com>,
"Thomas Petazzoni" <thomas.petazzoni@...e-electrons.com>,
Yijing Wang <wangyijing@...wei.com>
Subject: [PATCH 16/16] PCI/MSI: Clean up unused MSI arch functions
Now we use MSI controller in all platforms to configure
MSI/MSI-X. We can clean up the unused arch functions.
Signed-off-by: Yijing Wang <wangyijing@...wei.com>
Reviewed-by: Lucas Stach <l.stach@...gutronix.de>
---
drivers/pci/msi.c | 90 ++++++++++++++++++--------------------------------
include/linux/msi.h | 11 ------
2 files changed, 33 insertions(+), 68 deletions(-)
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 0e1da3e..cdb4634 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -27,7 +27,6 @@ int pci_msi_ignore_mask;
#define msix_table_size(flags) ((flags & PCI_MSIX_FLAGS_QSIZE) + 1)
-
/* Arch hooks */
struct msi_controller * __weak pcibios_msi_controller(struct pci_bus *bus)
@@ -35,56 +34,31 @@ struct msi_controller * __weak pcibios_msi_controller(struct pci_bus *bus)
return NULL;
}
-struct msi_controller *pci_msi_controller(struct pci_bus *bus)
-{
- return pcibios_msi_controller(bus);
-}
-
-int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
-{
- struct msi_controller *ctrl = pci_msi_controller(dev->bus);
- int err;
-
- if (!ctrl || !ctrl->setup_irq)
- return -EINVAL;
-
- err = ctrl->setup_irq(ctrl, dev, desc);
- if (err < 0)
- return err;
-
- return 0;
-}
-
-void __weak arch_teardown_msi_irq(unsigned int irq)
-{
- struct msi_desc *entry = irq_get_msi_desc(irq);
- struct msi_controller *ctrl = pci_msi_controller(entry->dev->bus);
-
- if (!ctrl || !ctrl->teardown_irq)
- return;
-
- ctrl->teardown_irq(ctrl, irq);
-}
-
-int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
+int setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
{
struct msi_desc *entry;
int ret;
struct msi_controller *ctrl;
- ctrl = pci_msi_controller(dev->bus);
- if (ctrl && ctrl->setup_irqs)
+ ctrl = pcibios_msi_controller(dev->bus);
+ if (!ctrl)
+ return -EINVAL;
+
+ if (ctrl->setup_irqs)
return ctrl->setup_irqs(ctrl, dev, nvec, type);
/*
* If an architecture wants to support multiple MSI, it needs to
- * override arch_setup_msi_irqs()
+ * implement ctrl->setup_irqs().
*/
if (type == PCI_CAP_ID_MSI && nvec > 1)
return 1;
+ if (!ctrl->setup_irq)
+ return -EINVAL;
+
list_for_each_entry(entry, &dev->msi_list, list) {
- ret = arch_setup_msi_irq(dev, entry);
+ ret = ctrl->setup_irq(ctrl, dev, entry);
if (ret < 0)
return ret;
if (ret > 0)
@@ -101,6 +75,10 @@ int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
void default_teardown_msi_irqs(struct pci_dev *dev)
{
struct msi_desc *entry;
+ struct msi_controller *ctrl = pcibios_msi_controller(dev->bus);
+
+ if (!ctrl->teardown_irq)
+ return;
list_for_each_entry(entry, &dev->msi_list, list) {
int i, nvec;
@@ -111,18 +89,18 @@ void default_teardown_msi_irqs(struct pci_dev *dev)
else
nvec = 1 << entry->msi_attrib.multiple;
for (i = 0; i < nvec; i++)
- arch_teardown_msi_irq(entry->irq + i);
+ ctrl->teardown_irq(ctrl, entry->irq + i);
}
}
-void __weak arch_teardown_msi_irqs(struct pci_dev *dev)
+static void teardown_msi_irqs(struct pci_dev *dev)
{
- struct msi_controller *ctrl = pci_msi_controller(dev->bus);
+ struct msi_controller *ctrl = pcibios_msi_controller(dev->bus);
if (ctrl && ctrl->teardown_irqs)
return ctrl->teardown_irqs(ctrl, dev);
- return default_teardown_msi_irqs(dev);
+ default_teardown_msi_irqs(dev);
}
static void default_restore_msi_irq(struct pci_dev *dev, int irq)
@@ -143,10 +121,17 @@ static void default_restore_msi_irq(struct pci_dev *dev, int irq)
__write_msi_msg(entry, &entry->msg);
}
-void __weak arch_restore_msi_irqs(struct pci_dev *dev)
+void default_restore_msi_irqs(struct pci_dev *dev)
{
- struct msi_controller *ctrl = pci_msi_controller(dev->bus);
+ struct msi_desc *entry;
+ list_for_each_entry(entry, &dev->msi_list, list)
+ default_restore_msi_irq(dev, entry->irq);
+}
+
+static void restore_msi_irqs(struct pci_dev *dev)
+{
+ struct msi_controller *ctrl = pcibios_msi_controller(dev->bus);
if (ctrl && ctrl->restore_irqs)
return ctrl->restore_irqs(ctrl, dev);
@@ -259,15 +244,6 @@ void unmask_msi_irq(struct irq_data *data)
msi_set_mask_bit(data, 0);
}
-void default_restore_msi_irqs(struct pci_dev *dev)
-{
- struct msi_desc *entry;
-
- list_for_each_entry(entry, &dev->msi_list, list) {
- default_restore_msi_irq(dev, entry->irq);
- }
-}
-
void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
{
BUG_ON(entry->dev->current_state != PCI_D0);
@@ -387,7 +363,7 @@ static void free_msi_irqs(struct pci_dev *dev)
BUG_ON(irq_has_action(entry->irq + i));
}
- arch_teardown_msi_irqs(dev);
+ teardown_msi_irqs(dev);
list_for_each_entry_safe(entry, tmp, &dev->msi_list, list) {
if (entry->msi_attrib.is_msix) {
@@ -446,7 +422,7 @@ static void __pci_restore_msi_state(struct pci_dev *dev)
pci_intx_for_msi(dev, 0);
msi_set_enable(dev, 0);
- arch_restore_msi_irqs(dev);
+ restore_msi_irqs(dev);
pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control);
msi_mask_irq(entry, msi_mask(entry->msi_attrib.multi_cap),
@@ -469,7 +445,7 @@ static void __pci_restore_msix_state(struct pci_dev *dev)
msix_clear_and_set_ctrl(dev, 0,
PCI_MSIX_FLAGS_ENABLE | PCI_MSIX_FLAGS_MASKALL);
- arch_restore_msi_irqs(dev);
+ restore_msi_irqs(dev);
list_for_each_entry(entry, &dev->msi_list, list) {
msix_mask_irq(entry, entry->masked);
}
@@ -639,7 +615,7 @@ static int msi_capability_init(struct pci_dev *dev, int nvec)
list_add_tail(&entry->list, &dev->msi_list);
/* Configure MSI capability structure */
- ret = arch_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSI);
+ ret = setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSI);
if (ret) {
msi_mask_irq(entry, mask, ~mask);
free_msi_irqs(dev);
@@ -754,7 +730,7 @@ static int msix_capability_init(struct pci_dev *dev,
if (ret)
return ret;
- ret = arch_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSIX);
+ ret = setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSIX);
if (ret)
goto out_avail;
diff --git a/include/linux/msi.h b/include/linux/msi.h
index 4426cb4..e4eb137 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -51,19 +51,8 @@ struct msi_desc {
struct msi_msg msg;
};
-/*
- * The arch hooks to setup up msi irqs. Those functions are
- * implemented as weak symbols so that they /can/ be overriden by
- * architecture specific code if needed.
- */
-int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
-void arch_teardown_msi_irq(unsigned int irq);
-int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
-void arch_teardown_msi_irqs(struct pci_dev *dev);
-void arch_restore_msi_irqs(struct pci_dev *dev);
void default_teardown_msi_irqs(struct pci_dev *dev);
-void default_restore_msi_irqs(struct pci_dev *dev);
struct msi_controller {
struct module *owner;
--
1.7.1
--
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