diff options
| -rw-r--r-- | drivers/gpu/drm/msm/Makefile | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/adreno/a6xx_catalog.c | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 7 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/adreno/a6xx_gpu.h | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/adreno/a6xx_preempt.c | 77 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/adreno/a6xx_preempt.h | 82 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/adreno/a8xx_gpu.c | 37 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/adreno/a8xx_preempt.c | 259 |
8 files changed, 389 insertions, 80 deletions
diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile index 8b94c5f1cb68..ba45e99be05b 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -25,6 +25,7 @@ adreno-y := \ adreno/a6xx_hfi.o \ adreno/a6xx_preempt.o \ adreno/a8xx_gpu.o \ + adreno/a8xx_preempt.o \ adreno-$(CONFIG_DEBUG_FS) += adreno/a5xx_debugfs.o \ diff --git a/drivers/gpu/drm/msm/adreno/a6xx_catalog.c b/drivers/gpu/drm/msm/adreno/a6xx_catalog.c index 53548f6e891b..21f5a685196b 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_catalog.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_catalog.c @@ -2120,6 +2120,7 @@ static const struct adreno_info a8xx_gpus[] = { .inactive_period = DRM_MSM_INACTIVE_PERIOD, .quirks = ADRENO_QUIRK_HAS_CACHED_COHERENT | ADRENO_QUIRK_HAS_HW_APRIV | + ADRENO_QUIRK_PREEMPTION | ADRENO_QUIRK_IFPC, .funcs = &a8xx_gpu_funcs, .a6xx = &(const struct a6xx_info) { diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c index fb52557e22d8..ae592022bebc 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c @@ -410,7 +410,7 @@ static void a6xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit) a6xx_flush(gpu, ring); } -static void a6xx_emit_set_pseudo_reg(struct msm_ringbuffer *ring, +void a6xx_emit_set_pseudo_reg(struct msm_ringbuffer *ring, struct a6xx_gpu *a6xx_gpu, struct msm_gpu_submitqueue *queue) { u64 preempt_postamble; @@ -620,7 +620,10 @@ static void a7xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit) a6xx_flush(gpu, ring); /* Check to see if we need to start preemption */ - a6xx_preempt_trigger(gpu); + if (adreno_is_a8xx(adreno_gpu)) + a8xx_preempt_trigger(gpu); + else + a6xx_preempt_trigger(gpu); } static void a6xx_set_hwcg(struct msm_gpu *gpu, bool state) diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.h b/drivers/gpu/drm/msm/adreno/a6xx_gpu.h index a4434a6a56dd..eb431e5e00b1 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.h +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.h @@ -278,6 +278,8 @@ void a6xx_preempt_hw_init(struct msm_gpu *gpu); void a6xx_preempt_trigger(struct msm_gpu *gpu); void a6xx_preempt_irq(struct msm_gpu *gpu); void a6xx_preempt_fini(struct msm_gpu *gpu); +void a6xx_emit_set_pseudo_reg(struct msm_ringbuffer *ring, + struct a6xx_gpu *a6xx_gpu, struct msm_gpu_submitqueue *queue); int a6xx_preempt_submitqueue_setup(struct msm_gpu *gpu, struct msm_gpu_submitqueue *queue); void a6xx_preempt_submitqueue_close(struct msm_gpu *gpu, @@ -327,6 +329,9 @@ void a8xx_gpu_get_slice_info(struct msm_gpu *gpu); int a8xx_hw_init(struct msm_gpu *gpu); irqreturn_t a8xx_irq(struct msm_gpu *gpu); void a8xx_llc_activate(struct a6xx_gpu *a6xx_gpu); +void a8xx_preempt_hw_init(struct msm_gpu *gpu); +void a8xx_preempt_trigger(struct msm_gpu *gpu); +void a8xx_preempt_irq(struct msm_gpu *gpu); bool a8xx_progress(struct msm_gpu *gpu, struct msm_ringbuffer *ring); void a8xx_recover(struct msm_gpu *gpu); #endif /* __A6XX_GPU_H__ */ diff --git a/drivers/gpu/drm/msm/adreno/a6xx_preempt.c b/drivers/gpu/drm/msm/adreno/a6xx_preempt.c index 747a22afad9f..df4cbf42e9a4 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_preempt.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_preempt.c @@ -6,85 +6,10 @@ #include "msm_gem.h" #include "a6xx_gpu.h" #include "a6xx_gmu.xml.h" +#include "a6xx_preempt.h" #include "msm_mmu.h" #include "msm_gpu_trace.h" -/* - * Try to transition the preemption state from old to new. Return - * true on success or false if the original state wasn't 'old' - */ -static inline bool try_preempt_state(struct a6xx_gpu *a6xx_gpu, - enum a6xx_preempt_state old, enum a6xx_preempt_state new) -{ - enum a6xx_preempt_state cur = atomic_cmpxchg(&a6xx_gpu->preempt_state, - old, new); - - return (cur == old); -} - -/* - * Force the preemption state to the specified state. This is used in cases - * where the current state is known and won't change - */ -static inline void set_preempt_state(struct a6xx_gpu *gpu, - enum a6xx_preempt_state new) -{ - /* - * preempt_state may be read by other cores trying to trigger a - * preemption or in the interrupt handler so barriers are needed - * before... - */ - smp_mb__before_atomic(); - atomic_set(&gpu->preempt_state, new); - /* ... and after*/ - smp_mb__after_atomic(); -} - -/* Write the most recent wptr for the given ring into the hardware */ -static inline void update_wptr(struct a6xx_gpu *a6xx_gpu, struct msm_ringbuffer *ring) -{ - unsigned long flags; - uint32_t wptr; - - spin_lock_irqsave(&ring->preempt_lock, flags); - - if (ring->restore_wptr) { - wptr = get_wptr(ring); - - a6xx_fenced_write(a6xx_gpu, REG_A6XX_CP_RB_WPTR, wptr, BIT(0), false); - - ring->restore_wptr = false; - } - - spin_unlock_irqrestore(&ring->preempt_lock, flags); -} - -/* Return the highest priority ringbuffer with something in it */ -static struct msm_ringbuffer *get_next_ring(struct msm_gpu *gpu) -{ - struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); - struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu); - - unsigned long flags; - int i; - - for (i = 0; i < gpu->nr_rings; i++) { - bool empty; - struct msm_ringbuffer *ring = gpu->rb[i]; - - spin_lock_irqsave(&ring->preempt_lock, flags); - empty = (get_wptr(ring) == gpu->funcs->get_rptr(gpu, ring)); - if (!empty && ring == a6xx_gpu->cur_ring) - empty = ring->memptrs->fence == a6xx_gpu->last_seqno[i]; - spin_unlock_irqrestore(&ring->preempt_lock, flags); - - if (!empty) - return ring; - } - - return NULL; -} - static void a6xx_preempt_timer(struct timer_list *t) { struct a6xx_gpu *a6xx_gpu = timer_container_of(a6xx_gpu, t, diff --git a/drivers/gpu/drm/msm/adreno/a6xx_preempt.h b/drivers/gpu/drm/msm/adreno/a6xx_preempt.h new file mode 100644 index 000000000000..df36c945b836 --- /dev/null +++ b/drivers/gpu/drm/msm/adreno/a6xx_preempt.h @@ -0,0 +1,82 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2018, The Linux Foundation. All rights reserved. */ +/* Copyright (c) 2023 Collabora, Ltd. */ +/* Copyright (c) 2024 Valve Corporation */ +/* Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. */ + +/* + * Try to transition the preemption state from old to new. Return + * true on success or false if the original state wasn't 'old' + */ +static inline bool try_preempt_state(struct a6xx_gpu *a6xx_gpu, + enum a6xx_preempt_state old, enum a6xx_preempt_state new) +{ + enum a6xx_preempt_state cur = atomic_cmpxchg(&a6xx_gpu->preempt_state, + old, new); + + return (cur == old); +} + +/* + * Force the preemption state to the specified state. This is used in cases + * where the current state is known and won't change + */ +static inline void set_preempt_state(struct a6xx_gpu *gpu, + enum a6xx_preempt_state new) +{ + /* + * preempt_state may be read by other cores trying to trigger a + * preemption or in the interrupt handler so barriers are needed + * before... + */ + smp_mb__before_atomic(); + atomic_set(&gpu->preempt_state, new); + /* ... and after */ + smp_mb__after_atomic(); +} + +/* Write the most recent wptr for the given ring into the hardware */ +static inline void update_wptr(struct a6xx_gpu *a6xx_gpu, struct msm_ringbuffer *ring) +{ + unsigned long flags; + uint32_t wptr; + + spin_lock_irqsave(&ring->preempt_lock, flags); + + if (ring->restore_wptr) { + wptr = get_wptr(ring); + + a6xx_fenced_write(a6xx_gpu, REG_A6XX_CP_RB_WPTR, wptr, BIT(0), false); + + ring->restore_wptr = false; + } + + spin_unlock_irqrestore(&ring->preempt_lock, flags); +} + +/* Return the highest priority ringbuffer with something in it */ +static inline struct msm_ringbuffer *get_next_ring(struct msm_gpu *gpu) +{ + struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); + struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu); + + unsigned long flags; + int i; + + for (i = 0; i < gpu->nr_rings; i++) { + bool empty; + struct msm_ringbuffer *ring = gpu->rb[i]; + + spin_lock_irqsave(&ring->preempt_lock, flags); + empty = (get_wptr(ring) == gpu->funcs->get_rptr(gpu, ring)); + if (!empty && ring == a6xx_gpu->cur_ring) + empty = ring->memptrs->fence == a6xx_gpu->last_seqno[i]; + spin_unlock_irqrestore(&ring->preempt_lock, flags); + + if (!empty) + return ring; + } + + return NULL; +} + diff --git a/drivers/gpu/drm/msm/adreno/a8xx_gpu.c b/drivers/gpu/drm/msm/adreno/a8xx_gpu.c index d6782bdde067..ccfccc45133f 100644 --- a/drivers/gpu/drm/msm/adreno/a8xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a8xx_gpu.c @@ -473,6 +473,34 @@ done: a8xx_aperture_clear(gpu); } +static int a8xx_preempt_start(struct msm_gpu *gpu) +{ + struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); + struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu); + struct msm_ringbuffer *ring = gpu->rb[0]; + + if (gpu->nr_rings <= 1) + return 0; + + /* Turn CP protection off */ + OUT_PKT7(ring, CP_SET_PROTECTED_MODE, 1); + OUT_RING(ring, 0); + + a6xx_emit_set_pseudo_reg(ring, a6xx_gpu, NULL); + + /* Yield the floor on command completion */ + OUT_PKT7(ring, CP_CONTEXT_SWITCH_YIELD, 4); + OUT_RING(ring, 0x00); + OUT_RING(ring, 0x00); + OUT_RING(ring, 0x00); + /* Generate interrupt on preemption completion */ + OUT_RING(ring, 0x00); + + a6xx_flush(gpu, ring); + + return a8xx_idle(gpu, ring) ? 0 : -EINVAL; +} + static int a8xx_cp_init(struct msm_gpu *gpu) { struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); @@ -748,6 +776,8 @@ static int hw_init(struct msm_gpu *gpu) gpu_write64(gpu, REG_A6XX_CP_RB_RPTR_ADDR, shadowptr(a6xx_gpu, gpu->rb[0])); gpu_write64(gpu, REG_A8XX_CP_RB_RPTR_ADDR_BV, rbmemptr(gpu->rb[0], bv_rptr)); + a8xx_preempt_hw_init(gpu); + for (i = 0; i < gpu->nr_rings; i++) a6xx_gpu->shadow[i] = 0; @@ -810,6 +840,9 @@ static int hw_init(struct msm_gpu *gpu) /* Enable hardware clockgating */ a8xx_set_hwcg(gpu, true); out: + /* Last step - yield the ringbuffer */ + a8xx_preempt_start(gpu); + /* * Tell the GMU that we are done touching the GPU and it can start power * management @@ -1219,11 +1252,11 @@ irqreturn_t a8xx_irq(struct msm_gpu *gpu) if (status & A6XX_RBBM_INT_0_MASK_CP_CACHE_FLUSH_TS) { msm_gpu_retire(gpu); - a6xx_preempt_trigger(gpu); + a8xx_preempt_trigger(gpu); } if (status & A6XX_RBBM_INT_0_MASK_CP_SW) - a6xx_preempt_irq(gpu); + a8xx_preempt_irq(gpu); return IRQ_HANDLED; } diff --git a/drivers/gpu/drm/msm/adreno/a8xx_preempt.c b/drivers/gpu/drm/msm/adreno/a8xx_preempt.c new file mode 100644 index 000000000000..3d8c33ba722e --- /dev/null +++ b/drivers/gpu/drm/msm/adreno/a8xx_preempt.c @@ -0,0 +1,259 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. */ + +#include "msm_gem.h" +#include "a6xx_gpu.h" +#include "a6xx_gmu.xml.h" +#include "a6xx_preempt.h" +#include "msm_mmu.h" +#include "msm_gpu_trace.h" + +static void preempt_prepare_postamble(struct a6xx_gpu *a6xx_gpu) +{ + u32 *postamble = a6xx_gpu->preempt_postamble_ptr; + u32 count = 0; + + postamble[count++] = PKT7(CP_REG_RMW, 3); + postamble[count++] = REG_A8XX_RBBM_PERFCTR_SRAM_INIT_CMD; + postamble[count++] = 0; + postamble[count++] = 1; + + postamble[count++] = PKT7(CP_WAIT_REG_MEM, 6); + postamble[count++] = CP_WAIT_REG_MEM_0_FUNCTION(WRITE_EQ); + postamble[count++] = CP_WAIT_REG_MEM_POLL_ADDR_LO( + REG_A8XX_RBBM_PERFCTR_SRAM_INIT_STATUS); + postamble[count++] = CP_WAIT_REG_MEM_POLL_ADDR_HI(0); + postamble[count++] = CP_WAIT_REG_MEM_3_REF(0x1); + postamble[count++] = CP_WAIT_REG_MEM_4_MASK(0x1); + postamble[count++] = CP_WAIT_REG_MEM_5_DELAY_LOOP_CYCLES(0); + + a6xx_gpu->preempt_postamble_len = count; + + a6xx_gpu->postamble_enabled = true; +} + +static void preempt_disable_postamble(struct a6xx_gpu *a6xx_gpu) +{ + u32 *postamble = a6xx_gpu->preempt_postamble_ptr; + + /* + * Disable the postamble by replacing the first packet header with a NOP + * that covers the whole buffer. + */ + *postamble = PKT7(CP_NOP, (a6xx_gpu->preempt_postamble_len - 1)); + + a6xx_gpu->postamble_enabled = false; +} + +/* + * Set preemption keepalive vote. Please note that this vote is different from the one used in + * a8xx_irq() + */ +static void a8xx_preempt_keepalive_vote(struct msm_gpu *gpu, bool on) +{ + struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); + struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu); + + gmu_write(&a6xx_gpu->gmu, REG_A8XX_GMU_PWR_COL_PREEMPT_KEEPALIVE, on); +} + +void a8xx_preempt_irq(struct msm_gpu *gpu) +{ + uint32_t status; + struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); + struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu); + struct drm_device *dev = gpu->dev; + + if (!try_preempt_state(a6xx_gpu, PREEMPT_TRIGGERED, PREEMPT_PENDING)) + return; + + /* Delete the preemption watchdog timer */ + timer_delete(&a6xx_gpu->preempt_timer); + + /* + * The hardware should be setting the stop bit of CP_CONTEXT_SWITCH_CNTL + * to zero before firing the interrupt, but there is a non zero chance + * of a hardware condition or a software race that could set it again + * before we have a chance to finish. If that happens, log and go for + * recovery + */ + status = gpu_read(gpu, REG_A8XX_CP_CONTEXT_SWITCH_CNTL); + if (unlikely(status & A8XX_CP_CONTEXT_SWITCH_CNTL_STOP)) { + DRM_DEV_ERROR(&gpu->pdev->dev, + "!!!!!!!!!!!!!!!! preemption faulted !!!!!!!!!!!!!! irq\n"); + set_preempt_state(a6xx_gpu, PREEMPT_FAULTED); + dev_err(dev->dev, "%s: Preemption failed to complete\n", + gpu->name); + kthread_queue_work(gpu->worker, &gpu->recover_work); + return; + } + + a6xx_gpu->cur_ring = a6xx_gpu->next_ring; + a6xx_gpu->next_ring = NULL; + + set_preempt_state(a6xx_gpu, PREEMPT_FINISH); + + update_wptr(a6xx_gpu, a6xx_gpu->cur_ring); + + set_preempt_state(a6xx_gpu, PREEMPT_NONE); + + a8xx_preempt_keepalive_vote(gpu, false); + + trace_msm_gpu_preemption_irq(a6xx_gpu->cur_ring->id); + + /* + * Retrigger preemption to avoid a deadlock that might occur when preemption + * is skipped due to it being already in flight when requested. + */ + a8xx_preempt_trigger(gpu); +} + +void a8xx_preempt_hw_init(struct msm_gpu *gpu) +{ + struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); + struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu); + int i; + + /* No preemption if we only have one ring */ + if (gpu->nr_rings == 1) + return; + + for (i = 0; i < gpu->nr_rings; i++) { + struct a6xx_preempt_record *record_ptr = a6xx_gpu->preempt[i]; + + record_ptr->wptr = 0; + record_ptr->rptr = 0; + record_ptr->rptr_addr = shadowptr(a6xx_gpu, gpu->rb[i]); + record_ptr->info = 0; + record_ptr->data = 0; + record_ptr->rbase = gpu->rb[i]->iova; + } + + /* Write a 0 to signal that we aren't switching pagetables */ + gpu_write64(gpu, REG_A8XX_CP_CONTEXT_SWITCH_SMMU_INFO, 0); + + /* Enable the GMEM save/restore feature for preemption */ + gpu_write(gpu, REG_A6XX_RB_CONTEXT_SWITCH_GMEM_SAVE_RESTORE_ENABLE, 0x1); + + /* Reset the preemption state */ + set_preempt_state(a6xx_gpu, PREEMPT_NONE); + + spin_lock_init(&a6xx_gpu->eval_lock); + + /* Always come up on rb 0 */ + a6xx_gpu->cur_ring = gpu->rb[0]; +} + +void a8xx_preempt_trigger(struct msm_gpu *gpu) +{ + struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); + struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu); + unsigned long flags; + struct msm_ringbuffer *ring; + unsigned int cntl; + bool sysprof; + + if (gpu->nr_rings == 1) + return; + + /* + * Lock to make sure another thread attempting preemption doesn't skip it + * while we are still evaluating the next ring. This makes sure the other + * thread does start preemption if we abort it and avoids a soft lock. + */ + spin_lock_irqsave(&a6xx_gpu->eval_lock, flags); + + /* + * Try to start preemption by moving from NONE to START. If + * unsuccessful, a preemption is already in flight + */ + if (!try_preempt_state(a6xx_gpu, PREEMPT_NONE, PREEMPT_START)) { + spin_unlock_irqrestore(&a6xx_gpu->eval_lock, flags); + return; + } + + cntl = A8XX_CP_CONTEXT_SWITCH_CNTL_LEVEL(a6xx_gpu->preempt_level); + + if (a6xx_gpu->skip_save_restore) + cntl |= A8XX_CP_CONTEXT_SWITCH_CNTL_SKIP_SAVE_RESTORE; + + if (a6xx_gpu->uses_gmem) + cntl |= A8XX_CP_CONTEXT_SWITCH_CNTL_USES_GMEM; + + cntl |= A8XX_CP_CONTEXT_SWITCH_CNTL_STOP; + + /* Get the next ring to preempt to */ + ring = get_next_ring(gpu); + + /* + * If no ring is populated or the highest priority ring is the current + * one do nothing except to update the wptr to the latest and greatest + */ + if (!ring || (a6xx_gpu->cur_ring == ring)) { + set_preempt_state(a6xx_gpu, PREEMPT_FINISH); + update_wptr(a6xx_gpu, a6xx_gpu->cur_ring); + set_preempt_state(a6xx_gpu, PREEMPT_NONE); + spin_unlock_irqrestore(&a6xx_gpu->eval_lock, flags); + return; + } + + spin_unlock_irqrestore(&a6xx_gpu->eval_lock, flags); + + spin_lock_irqsave(&ring->preempt_lock, flags); + + struct a7xx_cp_smmu_info *smmu_info_ptr = + a6xx_gpu->preempt_smmu[ring->id]; + struct a6xx_preempt_record *record_ptr = a6xx_gpu->preempt[ring->id]; + u64 ttbr0 = ring->memptrs->ttbr0; + u32 context_idr = ring->memptrs->context_idr; + + smmu_info_ptr->ttbr0 = ttbr0; + smmu_info_ptr->context_idr = context_idr; + record_ptr->wptr = get_wptr(ring); + + /* + * The GPU will write the wptr we set above when we preempt. Reset + * restore_wptr to make sure that we don't write WPTR to the same + * thing twice. It's still possible subsequent submissions will update + * wptr again, in which case they will set the flag to true. This has + * to be protected by the lock for setting the flag and updating wptr + * to be atomic. + */ + ring->restore_wptr = false; + + trace_msm_gpu_preemption_trigger(a6xx_gpu->cur_ring->id, ring->id); + + spin_unlock_irqrestore(&ring->preempt_lock, flags); + + /* Set the keepalive bit to keep the GPU ON until preemption is complete */ + a8xx_preempt_keepalive_vote(gpu, true); + + a6xx_fenced_write(a6xx_gpu, + REG_A8XX_CP_CONTEXT_SWITCH_SMMU_INFO, a6xx_gpu->preempt_smmu_iova[ring->id], + BIT(1), true); + + a6xx_fenced_write(a6xx_gpu, + REG_A8XX_CP_CONTEXT_SWITCH_PRIV_NON_SECURE_RESTORE_ADDR, + a6xx_gpu->preempt_iova[ring->id], BIT(1), true); + + a6xx_gpu->next_ring = ring; + + /* Start a timer to catch a stuck preemption */ + mod_timer(&a6xx_gpu->preempt_timer, jiffies + msecs_to_jiffies(10000)); + + /* Enable or disable postamble as needed */ + sysprof = refcount_read(&a6xx_gpu->base.base.sysprof_active) > 1; + + if (!sysprof && !a6xx_gpu->postamble_enabled) + preempt_prepare_postamble(a6xx_gpu); + + if (sysprof && a6xx_gpu->postamble_enabled) + preempt_disable_postamble(a6xx_gpu); + + /* Set the preemption state to triggered */ + set_preempt_state(a6xx_gpu, PREEMPT_TRIGGERED); + + /* Trigger the preemption */ + a6xx_fenced_write(a6xx_gpu, REG_A8XX_CP_CONTEXT_SWITCH_CNTL, cntl, BIT(1), false); +} + |