arch/ia64/kernel/msi_ia64.c

   1 /*
   2  * MSI hooks for standard x86 apic
   3  */
   4
   5 #include <linux/pci.h>
   6 #include <linux/irq.h>
   7 #include <linux/msi.h>
   8 #include <asm/smp.h>
   9
  10 /*
  11  * Shifts for APIC-based data
  12  */
  13
  14 #define MSI_DATA_VECTOR_SHIFT           0
  15 #define     MSI_DATA_VECTOR(v)          (((u8)v) << MSI_DATA_VECTOR_SHIFT)
  16 #define MSI_DATA_VECTOR_MASK            0xffffff00
  17
  18 #define MSI_DATA_DELIVERY_SHIFT         8
  19 #define     MSI_DATA_DELIVERY_FIXED     (0 << MSI_DATA_DELIVERY_SHIFT)
  20 #define     MSI_DATA_DELIVERY_LOWPRI    (1 << MSI_DATA_DELIVERY_SHIFT)
  21
  22 #define MSI_DATA_LEVEL_SHIFT            14
  23 #define     MSI_DATA_LEVEL_DEASSERT     (0 << MSI_DATA_LEVEL_SHIFT)
  24 #define     MSI_DATA_LEVEL_ASSERT       (1 << MSI_DATA_LEVEL_SHIFT)
  25
  26 #define MSI_DATA_TRIGGER_SHIFT          15
  27 #define     MSI_DATA_TRIGGER_EDGE       (0 << MSI_DATA_TRIGGER_SHIFT)
  28 #define     MSI_DATA_TRIGGER_LEVEL      (1 << MSI_DATA_TRIGGER_SHIFT)
  29
  30 /*
  31  * Shift/mask fields for APIC-based bus address
  32  */
  33
  34 #define MSI_TARGET_CPU_SHIFT            4
  35 #define MSI_ADDR_HEADER                 0xfee00000
  36
  37 #define MSI_ADDR_DESTID_MASK            0xfff0000f
  38 #define     MSI_ADDR_DESTID_CPU(cpu)    ((cpu) << MSI_TARGET_CPU_SHIFT)
  39
  40 #define MSI_ADDR_DESTMODE_SHIFT         2
  41 #define     MSI_ADDR_DESTMODE_PHYS      (0 << MSI_ADDR_DESTMODE_SHIFT)
  42 #define     MSI_ADDR_DESTMODE_LOGIC     (1 << MSI_ADDR_DESTMODE_SHIFT)
  43
  44 #define MSI_ADDR_REDIRECTION_SHIFT      3
  45 #define     MSI_ADDR_REDIRECTION_CPU    (0 << MSI_ADDR_REDIRECTION_SHIFT)
  46 #define     MSI_ADDR_REDIRECTION_LOWPRI (1 << MSI_ADDR_REDIRECTION_SHIFT)
  47
  48 static struct irq_chip  ia64_msi_chip;
  49
  50 #ifdef CONFIG_SMP
  51 static void ia64_set_msi_irq_affinity(unsigned int irq, cpumask_t cpu_mask)
  52 {
  53         struct msi_msg msg;
  54         u32 addr, data;
  55         int cpu = first_cpu(cpu_mask);
  56
  57         if (!cpu_online(cpu))
  58                 return;
  59
  60 <<<<<<< HEAD:arch/ia64/kernel/msi_ia64.c
  61         if (reassign_irq_vector(irq, cpu))
  62 =======
  63         if (irq_prepare_move(irq, cpu))
  64 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/ia64/kernel/msi_ia64.c
  65                 return;
  66
  67         read_msi_msg(irq, &msg);
  68
  69         addr = msg.address_lo;
  70         addr &= MSI_ADDR_DESTID_MASK;
  71         addr |= MSI_ADDR_DESTID_CPU(cpu_physical_id(cpu));
  72         msg.address_lo = addr;
  73
  74         data = msg.data;
  75         data &= MSI_DATA_VECTOR_MASK;
  76         data |= MSI_DATA_VECTOR(irq_to_vector(irq));
  77         msg.data = data;
  78
  79         write_msi_msg(irq, &msg);
  80         irq_desc[irq].affinity = cpumask_of_cpu(cpu);
  81 }
  82 #endif /* CONFIG_SMP */
  83
  84 int ia64_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
  85 {
  86         struct msi_msg  msg;
  87         unsigned long   dest_phys_id;
  88         int     irq, vector;
  89         cpumask_t mask;
  90
  91         irq = create_irq();
  92         if (irq < 0)
  93                 return irq;
  94
  95         set_irq_msi(irq, desc);
  96         cpus_and(mask, irq_to_domain(irq), cpu_online_map);
  97         dest_phys_id = cpu_physical_id(first_cpu(mask));
  98         vector = irq_to_vector(irq);
  99
 100         msg.address_hi = 0;
 101         msg.address_lo =
 102                 MSI_ADDR_HEADER |
 103                 MSI_ADDR_DESTMODE_PHYS |
 104                 MSI_ADDR_REDIRECTION_CPU |
 105                 MSI_ADDR_DESTID_CPU(dest_phys_id);
 106
 107         msg.data =
 108                 MSI_DATA_TRIGGER_EDGE |
 109                 MSI_DATA_LEVEL_ASSERT |
 110                 MSI_DATA_DELIVERY_FIXED |
 111                 MSI_DATA_VECTOR(vector);
 112
 113         write_msi_msg(irq, &msg);
 114         set_irq_chip_and_handler(irq, &ia64_msi_chip, handle_edge_irq);
 115
 116         return 0;
 117 }
 118
 119 void ia64_teardown_msi_irq(unsigned int irq)
 120 {
 121         destroy_irq(irq);
 122 }
 123
 124 static void ia64_ack_msi_irq(unsigned int irq)
 125 {
 126 <<<<<<< HEAD:arch/ia64/kernel/msi_ia64.c
 127 =======
 128         irq_complete_move(irq);
 129 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/ia64/kernel/msi_ia64.c
 130         move_native_irq(irq);
 131         ia64_eoi();
 132 }
 133
 134 static int ia64_msi_retrigger_irq(unsigned int irq)
 135 {
 136         unsigned int vector = irq_to_vector(irq);
 137         ia64_resend_irq(vector);
 138
 139         return 1;
 140 }
 141
 142 /*
 143  * Generic ops used on most IA64 platforms.
 144  */
 145 static struct irq_chip ia64_msi_chip = {
 146         .name           = "PCI-MSI",
 147         .mask           = mask_msi_irq,
 148         .unmask         = unmask_msi_irq,
 149         .ack            = ia64_ack_msi_irq,
 150 #ifdef CONFIG_SMP
 151         .set_affinity   = ia64_set_msi_irq_affinity,
 152 #endif
 153         .retrigger      = ia64_msi_retrigger_irq,
 154 };
 155
 156
 157 int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
 158 {
 159         if (platform_setup_msi_irq)
 160                 return platform_setup_msi_irq(pdev, desc);
 161
 162         return ia64_setup_msi_irq(pdev, desc);
 163 }
 164
 165 void arch_teardown_msi_irq(unsigned int irq)
 166 {
 167         if (platform_teardown_msi_irq)
 168                 return platform_teardown_msi_irq(irq);
 169
 170         return ia64_teardown_msi_irq(irq);
 171 }