diff options
| -rw-r--r-- | drivers/gpu/drm/imagination/pvr_device.c | 113 | ||||
| -rw-r--r-- | drivers/gpu/drm/imagination/pvr_device.h | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/imagination/pvr_fw.c | 3 |
3 files changed, 117 insertions, 2 deletions
diff --git a/drivers/gpu/drm/imagination/pvr_device.c b/drivers/gpu/drm/imagination/pvr_device.c index b6ce936f07c8..a47dd1dd8243 100644 --- a/drivers/gpu/drm/imagination/pvr_device.c +++ b/drivers/gpu/drm/imagination/pvr_device.c @@ -146,9 +146,61 @@ static void pvr_device_process_active_queues(struct pvr_device *pvr_dev) mutex_unlock(&pvr_dev->queues.lock); } +static bool pvr_device_safety_irq_pending(struct pvr_device *pvr_dev) +{ + u32 events; + + WARN_ON_ONCE(!pvr_dev->has_safety_events); + + events = pvr_cr_read32(pvr_dev, ROGUE_CR_EVENT_STATUS); + + return (events & ROGUE_CR_EVENT_STATUS_SAFETY_EN) != 0; +} + +static void pvr_device_safety_irq_clear(struct pvr_device *pvr_dev) +{ + WARN_ON_ONCE(!pvr_dev->has_safety_events); + + pvr_cr_write32(pvr_dev, ROGUE_CR_EVENT_CLEAR, + ROGUE_CR_EVENT_CLEAR_SAFETY_EN); +} + +static void pvr_device_handle_safety_events(struct pvr_device *pvr_dev) +{ + struct drm_device *drm_dev = from_pvr_device(pvr_dev); + u32 events; + + WARN_ON_ONCE(!pvr_dev->has_safety_events); + + events = pvr_cr_read32(pvr_dev, ROGUE_CR_SAFETY_EVENT_STATUS__ROGUEXE); + + /* Handle only these events on the host and leave the rest to the FW. */ + events &= ROGUE_CR_SAFETY_EVENT_STATUS__ROGUEXE__FAULT_FW_EN | + ROGUE_CR_SAFETY_EVENT_STATUS__ROGUEXE__WATCHDOG_TIMEOUT_EN; + + pvr_cr_write32(pvr_dev, ROGUE_CR_SAFETY_EVENT_CLEAR__ROGUEXE, events); + + if (events & ROGUE_CR_SAFETY_EVENT_STATUS__ROGUEXE__FAULT_FW_EN) { + u32 fault_fw = pvr_cr_read32(pvr_dev, ROGUE_CR_FAULT_FW_STATUS); + + pvr_cr_write32(pvr_dev, ROGUE_CR_FAULT_FW_CLEAR, fault_fw); + + drm_info(drm_dev, "Safety event: FW fault (mask=0x%08x)\n", fault_fw); + } + + if (events & ROGUE_CR_SAFETY_EVENT_STATUS__ROGUEXE__WATCHDOG_TIMEOUT_EN) { + /* + * The watchdog timer is disabled by the driver so this event + * should never be fired. + */ + drm_info(drm_dev, "Safety event: Watchdog timeout\n"); + } +} + static irqreturn_t pvr_device_irq_thread_handler(int irq, void *data) { struct pvr_device *pvr_dev = data; + struct drm_device *drm_dev = from_pvr_device(pvr_dev); irqreturn_t ret = IRQ_NONE; /* We are in the threaded handler, we can keep dequeuing events until we @@ -164,24 +216,76 @@ static irqreturn_t pvr_device_irq_thread_handler(int irq, void *data) pvr_device_process_active_queues(pvr_dev); } - pm_runtime_mark_last_busy(from_pvr_device(pvr_dev)->dev); + pm_runtime_mark_last_busy(drm_dev->dev); ret = IRQ_HANDLED; } + if (pvr_dev->has_safety_events) { + int err; + + /* + * Ensure the GPU is powered on since some safety events (such + * as ECC faults) can happen outside of job submissions, which + * are otherwise the only time a power reference is held. + */ + err = pvr_power_get(pvr_dev); + if (err) { + drm_err_ratelimited(drm_dev, + "%s: could not take power reference (%d)\n", + __func__, err); + return ret; + } + + while (pvr_device_safety_irq_pending(pvr_dev)) { + pvr_device_safety_irq_clear(pvr_dev); + pvr_device_handle_safety_events(pvr_dev); + + ret = IRQ_HANDLED; + } + + pvr_power_put(pvr_dev); + } + return ret; } static irqreturn_t pvr_device_irq_handler(int irq, void *data) { struct pvr_device *pvr_dev = data; + bool safety_irq_pending = false; + + if (pvr_dev->has_safety_events) + safety_irq_pending = pvr_device_safety_irq_pending(pvr_dev); - if (!pvr_fw_irq_pending(pvr_dev)) + if (!pvr_fw_irq_pending(pvr_dev) && !safety_irq_pending) return IRQ_NONE; /* Spurious IRQ - ignore. */ return IRQ_WAKE_THREAD; } +static void pvr_device_safety_irq_init(struct pvr_device *pvr_dev) +{ + u32 num_ecc_rams = 0; + + /* + * Safety events are an optional feature of the RogueXE platform. They + * are only enabled if at least one of ECC memory or the watchdog timer + * are present in HW. While safety events can be generated by other + * systems, that will never happen if the above mentioned hardware is + * not present. + */ + if (!PVR_HAS_FEATURE(pvr_dev, roguexe)) { + pvr_dev->has_safety_events = false; + return; + } + + PVR_FEATURE_VALUE(pvr_dev, ecc_rams, &num_ecc_rams); + + pvr_dev->has_safety_events = + num_ecc_rams > 0 || PVR_HAS_FEATURE(pvr_dev, watchdog_timer); +} + /** * pvr_device_irq_init() - Initialise IRQ required by a PowerVR device * @pvr_dev: Target PowerVR device. @@ -199,6 +303,8 @@ pvr_device_irq_init(struct pvr_device *pvr_dev) init_waitqueue_head(&pvr_dev->kccb.rtn_q); + pvr_device_safety_irq_init(pvr_dev); + pvr_dev->irq = platform_get_irq(plat_dev, 0); if (pvr_dev->irq < 0) return pvr_dev->irq; @@ -207,6 +313,9 @@ pvr_device_irq_init(struct pvr_device *pvr_dev) pvr_fw_irq_clear(pvr_dev); pvr_fw_irq_enable(pvr_dev); + if (pvr_dev->has_safety_events) + pvr_device_safety_irq_clear(pvr_dev); + /* * The ONESHOT flag ensures IRQs are masked while the thread handler is * running. diff --git a/drivers/gpu/drm/imagination/pvr_device.h b/drivers/gpu/drm/imagination/pvr_device.h index 2dd8a8885fe0..6c01d96657de 100644 --- a/drivers/gpu/drm/imagination/pvr_device.h +++ b/drivers/gpu/drm/imagination/pvr_device.h @@ -308,6 +308,9 @@ struct pvr_device { * struct pvr_file. */ spinlock_t ctx_list_lock; + + /** @has_safety_events: Whether this device can raise safety events. */ + bool has_safety_events; }; /** diff --git a/drivers/gpu/drm/imagination/pvr_fw.c b/drivers/gpu/drm/imagination/pvr_fw.c index 012596402a33..17c29b5081f4 100644 --- a/drivers/gpu/drm/imagination/pvr_fw.c +++ b/drivers/gpu/drm/imagination/pvr_fw.c @@ -437,6 +437,9 @@ fw_runtime_cfg_init(void *cpu_ptr, void *priv) runtime_cfg->active_pm_latency_persistant = true; WARN_ON(PVR_FEATURE_VALUE(pvr_dev, num_clusters, &runtime_cfg->default_dusts_num_init) != 0); + + /* Keep watchdog timer disabled. */ + runtime_cfg->wdg_period_us = 0; } static void |