-/* $Id: irq.c,v 1.114 2002/01/11 08:45:38 davem Exp $
- * irq.c: UltraSparc IRQ handling/init/registry.
+/* irq.c: UltraSparc IRQ handling/init/registry.
*
- * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
* Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
* Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
*/
#include <asm/cpudata.h>
#include <asm/auxio.h>
#include <asm/head.h>
+#include <asm/hypervisor.h>
/* UPA nodes send interrupt packet to UltraSparc with first data reg
* value low 5 (7 on Starfire) bits holding the IRQ identifier being
return 0;
}
-extern unsigned long real_hard_smp_processor_id(void);
-
static unsigned int sun4u_compute_tid(unsigned long imap, unsigned long cpuid)
{
unsigned int tid;
}
}
+static void sun4v_virq_enable(unsigned int virt_irq)
+{
+ struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+ unsigned int ino = bucket - &ivector_table[0];
+
+ if (likely(bucket)) {
+ unsigned long cpuid, dev_handle, dev_ino;
+ int err;
+
+ cpuid = irq_choose_cpu(virt_irq);
+
+ dev_handle = ino & IMAP_IGN;
+ dev_ino = ino & IMAP_INO;
+
+ err = sun4v_vintr_set_target(dev_handle, dev_ino, cpuid);
+ if (err != HV_EOK)
+ printk("sun4v_vintr_set_target(%lx,%lx,%lu): "
+ "err(%d)\n",
+ dev_handle, dev_ino, cpuid, err);
+ err = sun4v_vintr_set_state(dev_handle, dev_ino,
+ HV_INTR_STATE_IDLE);
+ if (err != HV_EOK)
+ printk("sun4v_vintr_set_state(%lx,%lx,"
+ "HV_INTR_STATE_IDLE): err(%d)\n",
+ dev_handle, dev_ino, err);
+ err = sun4v_vintr_set_valid(dev_handle, dev_ino,
+ HV_INTR_ENABLED);
+ if (err != HV_EOK)
+ printk("sun4v_vintr_set_state(%lx,%lx,"
+ "HV_INTR_ENABLED): err(%d)\n",
+ dev_handle, dev_ino, err);
+ }
+}
+
+static void sun4v_virq_disable(unsigned int virt_irq)
+{
+ struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+ unsigned int ino = bucket - &ivector_table[0];
+
+ if (likely(bucket)) {
+ unsigned long dev_handle, dev_ino;
+ int err;
+
+ dev_handle = ino & IMAP_IGN;
+ dev_ino = ino & IMAP_INO;
+
+ err = sun4v_vintr_set_valid(dev_handle, dev_ino,
+ HV_INTR_DISABLED);
+ if (err != HV_EOK)
+ printk("sun4v_vintr_set_state(%lx,%lx,"
+ "HV_INTR_DISABLED): err(%d)\n",
+ dev_handle, dev_ino, err);
+ }
+}
+
+static void sun4v_virq_end(unsigned int virt_irq)
+{
+ struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+ unsigned int ino = bucket - &ivector_table[0];
+
+ if (likely(bucket)) {
+ unsigned long dev_handle, dev_ino;
+ int err;
+
+ dev_handle = ino & IMAP_IGN;
+ dev_ino = ino & IMAP_INO;
+
+ err = sun4v_vintr_set_state(dev_handle, dev_ino,
+ HV_INTR_STATE_IDLE);
+ if (err != HV_EOK)
+ printk("sun4v_vintr_set_state(%lx,%lx,"
+ "HV_INTR_STATE_IDLE): err(%d)\n",
+ dev_handle, dev_ino, err);
+ }
+}
+
static void run_pre_handler(unsigned int virt_irq)
{
struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
};
#endif
+static struct irq_chip sun4v_virq = {
+ .typename = "vsun4v",
+ .enable = sun4v_virq_enable,
+ .disable = sun4v_virq_disable,
+ .end = sun4v_virq_end,
+};
+
+static struct irq_chip sun4v_virq_ack = {
+ .typename = "vsun4v+ack",
+ .enable = sun4v_virq_enable,
+ .disable = sun4v_virq_disable,
+ .ack = run_pre_handler,
+ .end = sun4v_virq_end,
+};
+
void irq_install_pre_handler(int virt_irq,
void (*func)(unsigned int, void *, void *),
void *arg1, void *arg2)
chip = get_irq_chip(virt_irq);
if (chip == &sun4u_irq_ack ||
- chip == &sun4v_irq_ack
+ chip == &sun4v_irq_ack ||
+ chip == &sun4v_virq_ack
#ifdef CONFIG_PCI_MSI
|| chip == &sun4v_msi
#endif
return;
chip = (chip == &sun4u_irq ?
- &sun4u_irq_ack : &sun4v_irq_ack);
+ &sun4u_irq_ack :
+ (chip == &sun4v_irq ?
+ &sun4v_irq_ack : &sun4v_virq_ack));
set_irq_chip(virt_irq, chip);
}
return bucket->virt_irq;
}
-unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino)
+static unsigned int sun4v_build_common(unsigned long sysino,
+ struct irq_chip *chip)
{
struct ino_bucket *bucket;
struct irq_handler_data *data;
- unsigned long sysino;
BUG_ON(tlb_type != hypervisor);
- sysino = sun4v_devino_to_sysino(devhandle, devino);
bucket = &ivector_table[sysino];
if (!bucket->virt_irq) {
bucket->virt_irq = virt_irq_alloc(__irq(bucket));
- set_irq_chip(bucket->virt_irq, &sun4v_irq);
+ set_irq_chip(bucket->virt_irq, chip);
}
data = get_irq_chip_data(bucket->virt_irq);
return bucket->virt_irq;
}
+unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino)
+{
+ unsigned long sysino = sun4v_devino_to_sysino(devhandle, devino);
+
+ return sun4v_build_common(sysino, &sun4v_irq);
+}
+
+unsigned int sun4v_build_virq(u32 devhandle, unsigned int devino)
+{
+ unsigned long sysino, hv_err;
+
+ BUG_ON(devhandle & ~IMAP_IGN);
+ BUG_ON(devino & ~IMAP_INO);
+
+ sysino = devhandle | devino;
+
+ hv_err = sun4v_vintr_set_cookie(devhandle, devino, sysino);
+ if (hv_err) {
+ prom_printf("IRQ: Fatal, cannot set cookie for [%x:%x] "
+ "err=%lu\n", devhandle, devino, hv_err);
+ prom_halt();
+ }
+
+ return sun4v_build_common(sysino, &sun4v_virq);
+}
+
#ifdef CONFIG_PCI_MSI
unsigned int sun4v_build_msi(u32 devhandle, unsigned int *virt_irq_p,
unsigned int msi_start, unsigned int msi_end)
trap_block[cpu].irq_worklist = 0;
}
-static void __cpuinit register_one_mondo(unsigned long paddr, unsigned long type)
+/* Please be very careful with register_one_mondo() and
+ * sun4v_register_mondo_queues().
+ *
+ * On SMP this gets invoked from the CPU trampoline before
+ * the cpu has fully taken over the trap table from OBP,
+ * and it's kernel stack + %g6 thread register state is
+ * not fully cooked yet.
+ *
+ * Therefore you cannot make any OBP calls, not even prom_printf,
+ * from these two routines.
+ */
+static void __cpuinit register_one_mondo(unsigned long paddr, unsigned long type, unsigned long qmask)
{
- unsigned long num_entries = 128;
+ unsigned long num_entries = (qmask + 1) / 64;
unsigned long status;
status = sun4v_cpu_qconf(type, paddr, num_entries);
{
struct trap_per_cpu *tb = &trap_block[this_cpu];
- register_one_mondo(tb->cpu_mondo_pa, HV_CPU_QUEUE_CPU_MONDO);
- register_one_mondo(tb->dev_mondo_pa, HV_CPU_QUEUE_DEVICE_MONDO);
- register_one_mondo(tb->resum_mondo_pa, HV_CPU_QUEUE_RES_ERROR);
- register_one_mondo(tb->nonresum_mondo_pa, HV_CPU_QUEUE_NONRES_ERROR);
+ register_one_mondo(tb->cpu_mondo_pa, HV_CPU_QUEUE_CPU_MONDO,
+ tb->cpu_mondo_qmask);
+ register_one_mondo(tb->dev_mondo_pa, HV_CPU_QUEUE_DEVICE_MONDO,
+ tb->dev_mondo_qmask);
+ register_one_mondo(tb->resum_mondo_pa, HV_CPU_QUEUE_RES_ERROR,
+ tb->resum_qmask);
+ register_one_mondo(tb->nonresum_mondo_pa, HV_CPU_QUEUE_NONRES_ERROR,
+ tb->nonresum_qmask);
}
-static void __cpuinit alloc_one_mondo(unsigned long *pa_ptr, int use_bootmem)
+static void __cpuinit alloc_one_mondo(unsigned long *pa_ptr, unsigned long qmask, int use_bootmem)
{
- void *page;
+ unsigned long size = PAGE_ALIGN(qmask + 1);
+ unsigned long order = get_order(size);
+ void *p = NULL;
- if (use_bootmem)
- page = alloc_bootmem_low_pages(PAGE_SIZE);
- else
- page = (void *) get_zeroed_page(GFP_ATOMIC);
+ if (use_bootmem) {
+ p = __alloc_bootmem_low(size, size, 0);
+ } else {
+ struct page *page = alloc_pages(GFP_ATOMIC | __GFP_ZERO, order);
+ if (page)
+ p = page_address(page);
+ }
- if (!page) {
+ if (!p) {
prom_printf("SUN4V: Error, cannot allocate mondo queue.\n");
prom_halt();
}
- *pa_ptr = __pa(page);
+ *pa_ptr = __pa(p);
}
-static void __cpuinit alloc_one_kbuf(unsigned long *pa_ptr, int use_bootmem)
+static void __cpuinit alloc_one_kbuf(unsigned long *pa_ptr, unsigned long qmask, int use_bootmem)
{
- void *page;
+ unsigned long size = PAGE_ALIGN(qmask + 1);
+ unsigned long order = get_order(size);
+ void *p = NULL;
- if (use_bootmem)
- page = alloc_bootmem_low_pages(PAGE_SIZE);
- else
- page = (void *) get_zeroed_page(GFP_ATOMIC);
+ if (use_bootmem) {
+ p = __alloc_bootmem_low(size, size, 0);
+ } else {
+ struct page *page = alloc_pages(GFP_ATOMIC | __GFP_ZERO, order);
+ if (page)
+ p = page_address(page);
+ }
- if (!page) {
+ if (!p) {
prom_printf("SUN4V: Error, cannot allocate kbuf page.\n");
prom_halt();
}
- *pa_ptr = __pa(page);
+ *pa_ptr = __pa(p);
}
static void __cpuinit init_cpu_send_mondo_info(struct trap_per_cpu *tb, int use_bootmem)
struct trap_per_cpu *tb = &trap_block[cpu];
if (alloc) {
- alloc_one_mondo(&tb->cpu_mondo_pa, use_bootmem);
- alloc_one_mondo(&tb->dev_mondo_pa, use_bootmem);
- alloc_one_mondo(&tb->resum_mondo_pa, use_bootmem);
- alloc_one_kbuf(&tb->resum_kernel_buf_pa, use_bootmem);
- alloc_one_mondo(&tb->nonresum_mondo_pa, use_bootmem);
- alloc_one_kbuf(&tb->nonresum_kernel_buf_pa, use_bootmem);
+ alloc_one_mondo(&tb->cpu_mondo_pa, tb->cpu_mondo_qmask, use_bootmem);
+ alloc_one_mondo(&tb->dev_mondo_pa, tb->dev_mondo_qmask, use_bootmem);
+ alloc_one_mondo(&tb->resum_mondo_pa, tb->resum_qmask, use_bootmem);
+ alloc_one_kbuf(&tb->resum_kernel_buf_pa, tb->resum_qmask, use_bootmem);
+ alloc_one_mondo(&tb->nonresum_mondo_pa, tb->nonresum_qmask, use_bootmem);
+ alloc_one_kbuf(&tb->nonresum_kernel_buf_pa, tb->nonresum_qmask, use_bootmem);
init_cpu_send_mondo_info(tb, use_bootmem);
}
git.samba.org / sfrench / cifs-2.6.git / blobdiff