irq_remapping/vt-d: Clean up unused MSI related code

Now MSI interrupt has been converted to new hierarchical irqdomain
interfaces, so remove legacy MSI related code.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Acked-by: Joerg Roedel <jroedel@suse.de>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: David Cohen <david.a.cohen@linux.intel.com>
Cc: Sander Eikelenboom <linux@eikelenboom.it>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: iommu@lists.linux-foundation.org
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dimitri Sivanich <sivanich@sgi.com>
Cc: Joerg Roedel <joro@8bytes.org>
Link: http://lkml.kernel.org/r/1428905519-23704-16-git-send-email-jiang.liu@linux.intel.com

diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index 97ea420..71a25ae 100644 (file)
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -145,44 +145,6 @@ static int qi_flush_iec(struct intel_iommu *iommu, int index, int mask)
        return qi_submit_sync(&desc, iommu);
 }
 
-static int map_irq_to_irte_handle(int irq, u16 *sub_handle)
-{
-       struct irq_2_iommu *irq_iommu = irq_2_iommu(irq);
-       unsigned long flags;
-       int index;
-
-       if (!irq_iommu)
-               return -1;
-
-       raw_spin_lock_irqsave(&irq_2_ir_lock, flags);
-       *sub_handle = irq_iommu->sub_handle;
-       index = irq_iommu->irte_index;
-       raw_spin_unlock_irqrestore(&irq_2_ir_lock, flags);
-       return index;
-}
-
-static int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index, u16 subhandle)
-{
-       struct irq_2_iommu *irq_iommu = irq_2_iommu(irq);
-       struct irq_cfg *cfg = irq_cfg(irq);
-       unsigned long flags;
-
-       if (!irq_iommu)
-               return -1;
-
-       raw_spin_lock_irqsave(&irq_2_ir_lock, flags);
-
-       cfg->remapped = 1;
-       irq_iommu->iommu = iommu;
-       irq_iommu->irte_index = index;
-       irq_iommu->sub_handle = subhandle;
-       irq_iommu->irte_mask = 0;
-
-       raw_spin_unlock_irqrestore(&irq_2_ir_lock, flags);
-
-       return 0;
-}
-
 static int modify_irte(struct irq_2_iommu *irq_iommu,
                       struct irte *irte_modified)
 {
@@ -1127,108 +1089,6 @@ intel_ioapic_set_affinity(struct irq_data *data, const struct cpumask *mask,
        return 0;
 }
 
-static void intel_compose_msi_msg(struct pci_dev *pdev,
-                                 unsigned int irq, unsigned int dest,
-                                 struct msi_msg *msg, u8 hpet_id)
-{
-       struct irq_cfg *cfg;
-       struct irte irte;
-       u16 sub_handle = 0;
-       int ir_index;
-
-       cfg = irq_cfg(irq);
-
-       ir_index = map_irq_to_irte_handle(irq, &sub_handle);
-       BUG_ON(ir_index == -1);
-
-       prepare_irte(&irte, cfg->vector, dest);
-
-       /* Set source-id of interrupt request */
-       if (pdev)
-               set_msi_sid(&irte, pdev);
-       else
-               set_hpet_sid(&irte, hpet_id);
-
-       modify_irte(irq_2_iommu(irq), &irte);
-
-       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(ir_index) |
-                         MSI_ADDR_IR_INDEX2(ir_index);
-}
-
-/*
- * Map the PCI dev to the corresponding remapping hardware unit
- * and allocate 'nvec' consecutive interrupt-remapping table entries
- * in it.
- */
-static int intel_msi_alloc_irq(struct pci_dev *dev, int irq, int nvec)
-{
-       struct intel_iommu *iommu;
-       int index;
-
-       down_read(&dmar_global_lock);
-       iommu = map_dev_to_ir(dev);
-       if (!iommu) {
-               printk(KERN_ERR
-                      "Unable to map PCI %s to iommu\n", pci_name(dev));
-               index = -ENOENT;
-       } else {
-               index = alloc_irte(iommu, irq, irq_2_iommu(irq), nvec);
-               if (index < 0) {
-                       printk(KERN_ERR
-                              "Unable to allocate %d IRTE for PCI %s\n",
-                              nvec, pci_name(dev));
-                       index = -ENOSPC;
-               }
-       }
-       up_read(&dmar_global_lock);
-
-       return index;
-}
-
-static int intel_msi_setup_irq(struct pci_dev *pdev, unsigned int irq,
-                              int index, int sub_handle)
-{
-       struct intel_iommu *iommu;
-       int ret = -ENOENT;
-
-       down_read(&dmar_global_lock);
-       iommu = map_dev_to_ir(pdev);
-       if (iommu) {
-               /*
-                * setup the mapping between the irq and the IRTE
-                * base index, the sub_handle pointing to the
-                * appropriate interrupt remap table entry.
-                */
-               set_irte_irq(irq, iommu, index, sub_handle);
-               ret = 0;
-       }
-       up_read(&dmar_global_lock);
-
-       return ret;
-}
-
-static int intel_alloc_hpet_msi(unsigned int irq, unsigned int id)
-{
-       int ret = -1;
-       struct intel_iommu *iommu;
-       int index;
-
-       down_read(&dmar_global_lock);
-       iommu = map_hpet_to_ir(id);
-       if (iommu) {
-               index = alloc_irte(iommu, irq, irq_2_iommu(irq), 1);
-               if (index >= 0)
-                       ret = 0;
-       }
-       up_read(&dmar_global_lock);
-
-       return ret;
-}
-
 static struct irq_domain *intel_get_ir_irq_domain(struct irq_alloc_info *info)
 {
        struct intel_iommu *iommu = NULL;
@@ -1285,10 +1145,6 @@ struct irq_remap_ops intel_irq_remap_ops = {
        .setup_ioapic_entry     = intel_setup_ioapic_entry,
        .set_affinity           = intel_ioapic_set_affinity,
        .free_irq               = free_irte,
-       .compose_msi_msg        = intel_compose_msi_msg,
-       .msi_alloc_irq          = intel_msi_alloc_irq,
-       .msi_setup_irq          = intel_msi_setup_irq,
-       .alloc_hpet_msi         = intel_alloc_hpet_msi,
        .get_ir_irq_domain      = intel_get_ir_irq_domain,
        .get_irq_domain         = intel_get_irq_domain,
 };