diff options
Diffstat (limited to 'hw/npu2-common.c')
| -rw-r--r-- | hw/npu2-common.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/hw/npu2-common.c b/hw/npu2-common.c index 3d0b636..b0d55f5 100644 --- a/hw/npu2-common.c +++ b/hw/npu2-common.c @@ -22,6 +22,12 @@ #include <bitutils.h> #include <nvram.h> #include <i2c.h> +#include <interrupts.h> +#include <xive.h> + +#define NPU2_IRQ_BASE_SHIFT 13 +#define NPU2_N_DL_IRQS 23 +#define NPU2_N_DL_IRQS_ALIGN 64 /* * We use the indirect method because it uses the same addresses as @@ -97,6 +103,99 @@ void npu2_write_mask_4b(struct npu2 *p, uint64_t reg, uint32_t val, uint32_t mas (uint64_t)new_val << 32); } +static uint64_t npu2_ipi_attributes(struct irq_source *is __unused, uint32_t isn __unused) +{ + struct npu2 *p = is->data; + uint32_t idx = isn - p->base_lsi; + + if (idx == 18) + /* TCE Interrupt - used to detect a frozen PE */ + return IRQ_ATTR_TARGET_OPAL | IRQ_ATTR_TARGET_RARE | IRQ_ATTR_TYPE_MSI; + else + return IRQ_ATTR_TARGET_LINUX; +} + +static char *npu2_ipi_name(struct irq_source *is, uint32_t isn) +{ + struct npu2 *p = is->data; + uint32_t idx = isn - p->base_lsi; + const char *name; + + switch (idx) { + case 0: name = "NDL 0 Stall Event (brick 0)"; break; + case 1: name = "NDL 0 No-Stall Event (brick 0)"; break; + case 2: name = "NDL 1 Stall Event (brick 1)"; break; + case 3: name = "NDL 1 No-Stall Event (brick 1)"; break; + case 4: name = "NDL 2 Stall Event (brick 2)"; break; + case 5: name = "NDL 2 No-Stall Event (brick 2)"; break; + case 6: name = "NDL 5 Stall Event (brick 3)"; break; + case 7: name = "NDL 5 No-Stall Event (brick 3)"; break; + case 8: name = "NDL 4 Stall Event (brick 4)"; break; + case 9: name = "NDL 4 No-Stall Event (brick 4)"; break; + case 10: name = "NDL 3 Stall Event (brick 5)"; break; + case 11: name = "NDL 3 No-Stall Event (brick 5)"; break; + case 12: name = "NTL 0 Event"; break; + case 13: name = "NTL 1 Event"; break; + case 14: name = "NTL 2 Event"; break; + case 15: name = "NTL 3 Event"; break; + case 16: name = "NTL 4 Event"; break; + case 17: name = "NTL 5 Event"; break; + case 18: name = "TCE Event"; break; + case 19: name = "ATS Event"; break; + case 20: name = "CQ Event"; break; + case 21: name = "MISC Event"; break; + case 22: name = "NMMU Local Xstop"; break; + default: name = "Unknown"; + } + return strdup(name); +} + +static void npu2_err_interrupt(struct irq_source *is, uint32_t isn) +{ + struct npu2 *p = is->data; + uint32_t idx = isn - p->base_lsi; + + if (idx != 18) { + prerror("OPAL received unknown NPU2 interrupt %d\n", idx); + return; + } + + opal_update_pending_evt(OPAL_EVENT_PCI_ERROR, + OPAL_EVENT_PCI_ERROR); +} + +static const struct irq_source_ops npu2_ipi_ops = { + .interrupt = npu2_err_interrupt, + .attributes = npu2_ipi_attributes, + .name = npu2_ipi_name, +}; + +static void setup_irqs(struct npu2 *p) +{ + uint64_t reg, val; + void *tp; + + p->base_lsi = xive_alloc_ipi_irqs(p->chip_id, NPU2_N_DL_IRQS, NPU2_N_DL_IRQS_ALIGN); + if (p->base_lsi == XIVE_IRQ_ERROR) { + prlog(PR_ERR, "NPU: Failed to allocate interrupt sources, IRQs for NDL No-stall events will not be available.\n"); + return; + } + xive_register_ipi_source(p->base_lsi, NPU2_N_DL_IRQS, p, &npu2_ipi_ops); + + /* Set IPI configuration */ + reg = NPU2_REG_OFFSET(NPU2_STACK_MISC, NPU2_BLOCK_MISC, NPU2_MISC_CFG); + val = npu2_read(p, reg); + val = SETFIELD(NPU2_MISC_CFG_IPI_PS, val, NPU2_MISC_CFG_IPI_PS_64K); + val = SETFIELD(NPU2_MISC_CFG_IPI_OS, val, NPU2_MISC_CFG_IPI_OS_AIX); + npu2_write(p, reg, val); + + /* Set IRQ base */ + reg = NPU2_REG_OFFSET(NPU2_STACK_MISC, NPU2_BLOCK_MISC, NPU2_MISC_IRQ_BASE); + tp = xive_get_trigger_port(p->base_lsi); + val = ((uint64_t)tp) << NPU2_IRQ_BASE_SHIFT; + npu2_write(p, reg, val); +} + static bool _i2c_presence_detect(struct npu2_dev *dev) { uint8_t state, data; @@ -277,6 +376,9 @@ static void setup_devices(struct npu2 *npu) } if (nvlink_detected) + setup_irqs(npu); + + if (nvlink_detected) npu2_nvlink_init_npu(npu); else if (ocapi_detected) npu2_opencapi_init_npu(npu); |