[Patch Part2 v5 27/31] x86, irq: Clean up unused MSI related code and interfaces

Jiang Liu
2014-11-06T14:26:31Z

Now MSI interrupt has been converted to new hierarchy irqdomain
interfaces, so kill legacy MSI related code and interfaces.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
---
arch/x86/include/asm/hpet.h | 9 ------
arch/x86/include/asm/x86_init.h | 4 ---
arch/x86/kernel/apic/msi.c | 61 +++++----------------------------------
3 files changed, 7 insertions(+), 67 deletions(-)

diff --git a/arch/x86/include/asm/hpet.h b/arch/x86/include/asm/hpet.h
index e87e9faf87a9..5fa9fb0f8809 100644
--- a/arch/x86/include/asm/hpet.h
+++ b/arch/x86/include/asm/hpet.h
@@ -85,15 +85,6 @@ extern struct irq_domain *hpet_create_irq_domain(int hpet_id);
extern int hpet_assign_irq(struct irq_domain *domain,
struct hpet_dev *dev, int dev_num);

-#ifdef CONFIG_PCI_MSI
-extern int default_setup_hpet_msi(unsigned int irq, unsigned int id);
-#else
-static inline int default_setup_hpet_msi(unsigned int irq, unsigned int id)
-{
- return -EINVAL;
-}
-#endif
-
#ifdef CONFIG_HPET_EMULATE_RTC

#include <linux/interrupt.h>
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index e45e4da96bf1..9b53cb2acfbb 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -176,13 +176,9 @@ struct msi_desc;

struct x86_msi_ops {
int (*setup_msi_irqs)(struct pci_dev *dev, int nvec, int type);
- void (*compose_msi_msg)(struct pci_dev *dev, unsigned int irq,
- unsigned int dest, struct msi_msg *msg,
- u8 hpet_id);
void (*teardown_msi_irq)(unsigned int irq);
void (*teardown_msi_irqs)(struct pci_dev *dev);
void (*restore_msi_irqs)(struct pci_dev *dev);
- int (*setup_hpet_msi)(unsigned int irq, unsigned int id);
u32 (*msi_mask_irq)(struct msi_desc *desc, u32 mask, u32 flag);
u32 (*msix_mask_irq)(struct msi_desc *desc, u32 flag);
};
diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index 3e0ac4516000..49f02609a7e0 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -25,16 +25,12 @@

static struct irq_domain *msi_default_domain;

-void native_compose_msi_msg(struct pci_dev *pdev,
- unsigned int irq, unsigned int dest,
- struct msi_msg *msg, u8 hpet_id)
+static void native_compose_msi_msg(struct irq_cfg *cfg, struct msi_msg *msg)
{
- struct irq_cfg *cfg = irq_cfg(irq);
-
msg->address_hi = MSI_ADDR_BASE_HI;

if (x2apic_enabled())
- msg->address_hi |= MSI_ADDR_EXT_DEST_ID(dest);
+ msg->address_hi |= MSI_ADDR_EXT_DEST_ID(cfg->dest_apicid);

msg->address_lo =
MSI_ADDR_BASE_LO |
@@ -44,7 +40,7 @@ void native_compose_msi_msg(struct pci_dev *pdev,
((apic->irq_delivery_mode != dest_LowestPrio) ?
MSI_ADDR_REDIRECTION_CPU :
MSI_ADDR_REDIRECTION_LOWPRI) |
- MSI_ADDR_DEST_ID(dest);
+ MSI_ADDR_DEST_ID(cfg->dest_apicid);

msg->data =
MSI_DATA_TRIGGER_EDGE |
@@ -55,7 +51,7 @@ void native_compose_msi_msg(struct pci_dev *pdev,
MSI_DATA_VECTOR(cfg->vector);
}

-static void irq_msi_compose_msg(struct irq_data *data, struct msi_msg *msg)
+static void msi_compose_msg(struct irq_data *data, struct msi_msg *msg)
{
struct irq_cfg *cfg = irqd_cfg(data);

@@ -93,31 +89,6 @@ static void msi_update_msg(struct msi_msg *msg, struct irq_data *irq_data)
msg->address_lo |= MSI_ADDR_DEST_ID(cfg->dest_apicid);
}

-static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq,
- struct msi_msg *msg, u8 hpet_id)
-{
- struct irq_cfg *cfg;
- int err;
- unsigned dest;
-
- if (disable_apic)
- return -ENXIO;
-
- cfg = irq_cfg(irq);
- err = assign_irq_vector(irq, cfg, apic->target_cpus());
- if (err)
- return err;
-
- err = apic->cpu_mask_to_apicid_and(cfg->domain,
- apic->target_cpus(), &dest);
- if (err)
- return err;
-
- x86_msi.compose_msi_msg(pdev, irq, dest, msg, hpet_id);
-
- return 0;
-}
-
static int msi_set_affinity(struct irq_data *data, const struct cpumask *mask,
bool force)
{
@@ -148,7 +119,7 @@ static struct irq_chip msi_chip = {
.irq_set_affinity = msi_set_affinity,
.irq_retrigger = irq_chip_retrigger_hierarchy,
.irq_print_chip = irq_remapping_print_chip,
- .irq_compose_msi_msg = irq_msi_compose_msg,
+ .irq_compose_msi_msg = msi_compose_msg,
.flags = IRQCHIP_SKIP_SET_WAKE,
};

@@ -253,7 +224,7 @@ int arch_setup_dmar_msi(unsigned int irq)
struct msi_msg msg;
struct irq_cfg *cfg = irq_cfg(irq);

- native_compose_msi_msg(NULL, irq, cfg->dest_apicid, &msg, -1);
+ native_compose_msi_msg(cfg, &msg);
dmar_msi_write(irq, &msg);
irq_set_chip_and_handler_name(irq, &dmar_msi_type, handle_edge_irq,
"edge");
@@ -305,28 +276,10 @@ static struct irq_chip hpet_msi_type = {
.irq_set_affinity = hpet_msi_set_affinity,
.irq_retrigger = irq_chip_retrigger_hierarchy,
.irq_print_chip = irq_remapping_print_chip,
- .irq_compose_msi_msg = irq_msi_compose_msg,
+ .irq_compose_msi_msg = msi_compose_msg,
.flags = IRQCHIP_SKIP_SET_WAKE,
};

-int default_setup_hpet_msi(unsigned int irq, unsigned int id)
-{
- struct irq_chip *chip = &hpet_msi_type;
- struct msi_msg msg;
- int ret;
-
- ret = msi_compose_msg(NULL, irq, &msg, id);
- if (ret < 0)
- return ret;
-
- hpet_msi_write(irq_get_handler_data(irq), &msg);
- irq_set_status_flags(irq, IRQ_MOVE_PCNTXT);
- setup_remapped_irq(irq, irq_cfg(irq), chip);
-
- irq_set_chip_and_handler_name(irq, chip, handle_edge_irq, "edge");
- return 0;
-}
-
static int hpet_domain_alloc(struct irq_domain *domain, unsigned int virq,
unsigned int nr_irqs, void *arg)
{
--
1.7.10.4