[PATCH v3 13/35] iommu/intel: Use msi_msg shadow structs

David Woodhouse
2020-10-24T21:36:24Z

From: Thomas Gleixner <tglx@linutronix.de>

Use the bitfields in the x86 shadow struct to compose the MSI message.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
drivers/iommu/intel/irq_remapping.c | 24 ++++++++++++++++--------
1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index 5628d43b795e..30269b738fa5 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -20,7 +20,6 @@
#include <asm/cpu.h>
#include <asm/irq_remapping.h>
#include <asm/pci-direct.h>
-#include <asm/msidef.h>

#include "../irq_remapping.h"

@@ -1260,6 +1259,21 @@ static struct irq_chip intel_ir_chip = {
.irq_set_vcpu_affinity = intel_ir_set_vcpu_affinity,
};

+static void fill_msi_msg(struct msi_msg *msg, u32 index, u32 subhandle)
+{
+ memset(msg, 0, sizeof(*msg));
+
+ msg->arch_addr_lo.dmar_base_address = X86_MSI_BASE_ADDRESS_LOW;
+ msg->arch_addr_lo.dmar_subhandle_valid = true;
+ msg->arch_addr_lo.dmar_format = true;
+ msg->arch_addr_lo.dmar_index_0_14 = index & 0x7FFF;
+ msg->arch_addr_lo.dmar_index_15 = !!(index & 0x8000);
+
+ msg->address_hi = X86_MSI_BASE_ADDRESS_HIGH;
+
+ msg->arch_data.dmar_subhandle = subhandle;
+}
+
static void intel_irq_remapping_prepare_irte(struct intel_ir_data *data,
struct irq_cfg *irq_cfg,
struct irq_alloc_info *info,
@@ -1267,7 +1281,6 @@ static void intel_irq_remapping_prepare_irte(struct intel_ir_data *data,
{
struct IR_IO_APIC_route_entry *entry;
struct irte *irte = &data->irte_entry;
- struct msi_msg *msg = &data->msi_entry;

prepare_irte(irte, irq_cfg->vector, irq_cfg->dest_apicid);
switch (info->type) {
@@ -1308,12 +1321,7 @@ static void intel_irq_remapping_prepare_irte(struct intel_ir_data *data,
else
set_msi_sid(irte, msi_desc_to_pci_dev(info->desc));

- msg->address_hi = MSI_ADDR_BASE_HI;
- msg->data = sub_handle;
- msg->address_lo = MSI_ADDR_BASE_LO | MSI_ADDR_IR_EXT_INT |
- MSI_ADDR_IR_SHV |
- MSI_ADDR_IR_INDEX1(index) |
- MSI_ADDR_IR_INDEX2(index);
+ fill_msi_msg(&data->msi_entry, index, sub_handle);
break;