void
xics_end_irq(
u_int irq
)
{
int cpu = smp_processor_id();
ops->cppr_info(cpu, 0); /* actually the value overwritten by ack */
iosync();
ops->xirr_info_set(cpu, ((0xff<<24) | (virt_irq_to_real(irq-XICS_IRQ_OFFSET))));
iosync();
}
static void icp_hv_eoi(struct irq_data *d)
{
unsigned int hw_irq = (unsigned int)irqd_to_hwirq(d);
iosync();
icp_hv_set_xirr((xics_pop_cppr() << 24) | hw_irq);
}
static void xics_eoi_lpar(unsigned int virq)
{
unsigned int irq = (unsigned int)irq_map[virq].hwirq;
iosync();
lpar_xirr_info_set((pop_cppr() << 24) | irq);
}
void xics_setup_cpu(void)
{
int cpu = smp_processor_id();
ops->cppr_info(cpu, 0xff);
iosync();
}
void
xics_mask_and_ack_irq(u_int irq)
{
int cpu = smp_processor_id();
if( irq < XICS_IRQ_OFFSET ) {
i8259_pic.ack(irq);
iosync();
ops->xirr_info_set(cpu, ((0xff<<24) | xics_irq_8259_cascade_real));
iosync();
}
else {
ops->cppr_info(cpu, 0xff);
iosync();
}
}
static void xics_eoi_direct(unsigned int virq)
{
unsigned int irq = (unsigned int)irq_map[virq].hwirq;
iosync();
direct_xirr_info_set((0xff << 24) | irq);
}
u64 hipz_h_eoi(int irq)
{
unsigned long xirr;
iosync();
xirr = (0xffULL << 24) | irq;
return plpar_hcall_norets(H_EOI, xirr);
}
void holly_restart(char *cmd)
{
__be32 __iomem *ocn_bar1 = NULL;
unsigned long bar;
struct device_node *bridge = NULL;
const void *prop;
int size;
phys_addr_t addr = 0xc0000000;
local_irq_disable();
bridge = of_find_node_by_type(NULL, "tsi-bridge");
if (bridge) {
prop = of_get_property(bridge, "reg", &size);
addr = of_translate_address(bridge, prop);
}
addr += (TSI108_PB_OFFSET + 0x414);
ocn_bar1 = ioremap(addr, 0x4);
/* Turn on the BOOT bit so the addresses are correctly
* routed to the HLP interface */
bar = ioread32be(ocn_bar1);
bar |= 2;
iowrite32be(bar, ocn_bar1);
iosync();
/* Set SRR0 to the reset vector and turn on MSR_IP */
mtspr(SPRN_SRR0, 0xfff00100);
mtspr(SPRN_SRR1, MSR_IP);
/* Do an rfi to jump back to firmware. Somewhat evil,
* but it works
*/
__asm__ __volatile__("rfi" : : : "memory");
/* Spin until reset happens. Shouldn't really get here */
for (;;) ;
}
static void icp_hv_set_cpu_priority(unsigned char cppr)
{
xics_set_base_cppr(cppr);
icp_hv_set_cppr(cppr);
iosync();
}
void ehca_process_eq(struct ehca_shca *shca, int is_irq)
{
struct ehca_eq *eq = &shca->eq;
struct ehca_eqe_cache_entry *eqe_cache = eq->eqe_cache;
u64 eqe_value, ret;
unsigned long flags;
int eqe_cnt, i;
int eq_empty = 0;
spin_lock_irqsave(&eq->irq_spinlock, flags);
if (is_irq) {
const int max_query_cnt = 100;
int query_cnt = 0;
int int_state = 1;
do {
int_state = hipz_h_query_int_state(
shca->ipz_hca_handle, eq->ist);
query_cnt++;
iosync();
} while (int_state && query_cnt < max_query_cnt);
if (unlikely((query_cnt == max_query_cnt)))
ehca_dbg(&shca->ib_device, "int_state=%x query_cnt=%x",
int_state, query_cnt);
}
/* read out all eqes */
eqe_cnt = 0;
do {
u32 token;
eqe_cache[eqe_cnt].eqe = ehca_poll_eq(shca, eq);
if (!eqe_cache[eqe_cnt].eqe)
break;
eqe_value = eqe_cache[eqe_cnt].eqe->entry;
if (EHCA_BMASK_GET(EQE_COMPLETION_EVENT, eqe_value)) {
token = EHCA_BMASK_GET(EQE_CQ_TOKEN, eqe_value);
read_lock(&ehca_cq_idr_lock);
eqe_cache[eqe_cnt].cq = idr_find(&ehca_cq_idr, token);
if (eqe_cache[eqe_cnt].cq)
atomic_inc(&eqe_cache[eqe_cnt].cq->nr_events);
read_unlock(&ehca_cq_idr_lock);
if (!eqe_cache[eqe_cnt].cq) {
ehca_err(&shca->ib_device,
"Invalid eqe for non-existing cq "
"token=%x", token);
continue;
}
} else
eqe_cache[eqe_cnt].cq = NULL;
eqe_cnt++;
} while (eqe_cnt < EHCA_EQE_CACHE_SIZE);
if (!eqe_cnt) {
if (is_irq)
ehca_dbg(&shca->ib_device,
"No eqe found for irq event");
goto unlock_irq_spinlock;
} else if (!is_irq) {
ret = hipz_h_eoi(eq->ist);
if (ret != H_SUCCESS)
ehca_err(&shca->ib_device,
"bad return code EOI -rc = %lld\n", ret);
ehca_dbg(&shca->ib_device, "deadman found %x eqe", eqe_cnt);
}
if (unlikely(eqe_cnt == EHCA_EQE_CACHE_SIZE))
ehca_dbg(&shca->ib_device, "too many eqes for one irq event");
/* enable irq for new packets */
for (i = 0; i < eqe_cnt; i++) {
if (eq->eqe_cache[i].cq)
reset_eq_pending(eq->eqe_cache[i].cq);
}
/* check eq */
spin_lock(&eq->spinlock);
eq_empty = (!ipz_eqit_eq_peek_valid(&shca->eq.ipz_queue));
spin_unlock(&eq->spinlock);
/* call completion handler for cached eqes */
for (i = 0; i < eqe_cnt; i++)
if (eq->eqe_cache[i].cq) {
if (ehca_scaling_code)
queue_comp_task(eq->eqe_cache[i].cq);
else {
struct ehca_cq *cq = eq->eqe_cache[i].cq;
comp_event_callback(cq);
if (atomic_dec_and_test(&cq->nr_events))
wake_up(&cq->wait_completion);
}
} else {
ehca_dbg(&shca->ib_device, "Got non completion event");
parse_identifier(shca, eq->eqe_cache[i].eqe->entry);
}
/* poll eq if not empty */
if (eq_empty)
goto unlock_irq_spinlock;
do {
struct ehca_eqe *eqe;
eqe = ehca_poll_eq(shca, &shca->eq);
if (!eqe)
break;
process_eqe(shca, eqe);
} while (1);
unlock_irq_spinlock:
spin_unlock_irqrestore(&eq->irq_spinlock, flags);
}
void
xics_init_IRQ( void )
{
int i;
unsigned long intr_size = 0;
struct device_node *np;
uint *ireg, ilen, indx=0;
ibm_get_xive = rtas_token("ibm,get-xive");
ibm_set_xive = rtas_token("ibm,set-xive");
ibm_int_off = rtas_token("ibm,int-off");
np = find_type_devices("PowerPC-External-Interrupt-Presentation");
if (!np) {
printk(KERN_WARNING "Can't find Interrupt Presentation\n");
udbg_printf("Can't find Interrupt Presentation\n");
while (1);
}
nextnode:
ireg = (uint *)get_property(np, "ibm,interrupt-server-ranges", 0);
if (ireg) {
/*
* set node starting index for this node
*/
indx = *ireg;
}
ireg = (uint *)get_property(np, "reg", &ilen);
if (!ireg) {
printk(KERN_WARNING "Can't find Interrupt Reg Property\n");
udbg_printf("Can't find Interrupt Reg Property\n");
while (1);
}
while (ilen) {
inodes[indx].addr = (unsigned long long)*ireg++ << 32;
ilen -= sizeof(uint);
inodes[indx].addr |= *ireg++;
ilen -= sizeof(uint);
inodes[indx].size = (unsigned long long)*ireg++ << 32;
ilen -= sizeof(uint);
inodes[indx].size |= *ireg++;
ilen -= sizeof(uint);
indx++;
if (indx >= NR_CPUS) break;
}
np = np->next;
if ((indx < NR_CPUS) && np) goto nextnode;
/* Find the server numbers for the boot cpu. */
for (np = find_type_devices("cpu"); np; np = np->next) {
ireg = (uint *)get_property(np, "reg", &ilen);
if (ireg && ireg[0] == hard_smp_processor_id()) {
ireg = (uint *)get_property(np, "ibm,ppc-interrupt-gserver#s", &ilen);
i = ilen / sizeof(int);
if (ireg && i > 0) {
default_server = ireg[0];
default_distrib_server = ireg[i-1]; /* take last element */
}
break;
}
}
intr_base = inodes[0].addr;
intr_size = (ulong)inodes[0].size;
np = find_type_devices("interrupt-controller");
if (!np) {
printk(KERN_WARNING "xics: no ISA Interrupt Controller\n");
xics_irq_8259_cascade = -1;
} else {
ireg = (uint *) get_property(np, "interrupts", 0);
if (!ireg) {
printk(KERN_WARNING "Can't find ISA Interrupts Property\n");
udbg_printf("Can't find ISA Interrupts Property\n");
while (1);
}
xics_irq_8259_cascade_real = *ireg;
xics_irq_8259_cascade = virt_irq_create_mapping(xics_irq_8259_cascade_real);
}
if (naca->platform == PLATFORM_PSERIES) {
#ifdef CONFIG_SMP
for (i = 0; i < naca->processorCount; ++i) {
xics_info.per_cpu[i] =
__ioremap((ulong)inodes[get_hard_smp_processor_id(i)].addr,
(ulong)inodes[get_hard_smp_processor_id(i)].size, _PAGE_NO_CACHE);
}
#else
xics_info.per_cpu[0] = __ioremap((ulong)intr_base, intr_size, _PAGE_NO_CACHE);
#endif /* CONFIG_SMP */
#ifdef CONFIG_PPC_PSERIES
/* actually iSeries does not use any of xics...but it has link dependencies
* for now, except this new one...
*/
} else if (naca->platform == PLATFORM_PSERIES_LPAR) {
ops = &pSeriesLP_ops;
#endif
}
xics_8259_pic.enable = i8259_pic.enable;
xics_8259_pic.disable = i8259_pic.disable;
for (i = 0; i < 16; ++i)
irq_desc[i].handler = &xics_8259_pic;
for (; i < NR_IRQS; ++i)
irq_desc[i].handler = &xics_pic;
ops->cppr_info(0, 0xff);
iosync();
if (xics_irq_8259_cascade != -1) {
if (request_irq(xics_irq_8259_cascade + XICS_IRQ_OFFSET, no_action,
0, "8259 cascade", 0))
printk(KERN_ERR "xics_init_IRQ: couldn't get 8259 cascade\n");
i8259_init();
}
#ifdef CONFIG_SMP
real_irq_to_virt_map[XICS_IPI] = virt_irq_to_real_map[XICS_IPI] = XICS_IPI;
request_irq(XICS_IPI + XICS_IRQ_OFFSET, xics_ipi_action, 0, "IPI", 0);
irq_desc[XICS_IPI+XICS_IRQ_OFFSET].status |= IRQ_PER_CPU;
#endif
}
