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Diffstat (limited to 'drivers/gpu/drm/msm/adreno/a5xx_gpu.h')
-rw-r--r--drivers/gpu/drm/msm/adreno/a5xx_gpu.h174
1 files changed, 174 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.h b/drivers/gpu/drm/msm/adreno/a5xx_gpu.h
new file mode 100644
index 000000000..c7187bcc5
--- /dev/null
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.h
@@ -0,0 +1,174 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (c) 2016-2017 The Linux Foundation. All rights reserved.
+ */
+#ifndef __A5XX_GPU_H__
+#define __A5XX_GPU_H__
+
+#include "adreno_gpu.h"
+
+/* Bringing over the hack from the previous targets */
+#undef ROP_COPY
+#undef ROP_XOR
+
+#include "a5xx.xml.h"
+
+struct a5xx_gpu {
+ struct adreno_gpu base;
+
+ struct drm_gem_object *pm4_bo;
+ uint64_t pm4_iova;
+
+ struct drm_gem_object *pfp_bo;
+ uint64_t pfp_iova;
+
+ struct drm_gem_object *gpmu_bo;
+ uint64_t gpmu_iova;
+ uint32_t gpmu_dwords;
+
+ uint32_t lm_leakage;
+
+ struct msm_ringbuffer *cur_ring;
+ struct msm_ringbuffer *next_ring;
+
+ struct drm_gem_object *preempt_bo[MSM_GPU_MAX_RINGS];
+ struct drm_gem_object *preempt_counters_bo[MSM_GPU_MAX_RINGS];
+ struct a5xx_preempt_record *preempt[MSM_GPU_MAX_RINGS];
+ uint64_t preempt_iova[MSM_GPU_MAX_RINGS];
+
+ atomic_t preempt_state;
+ struct timer_list preempt_timer;
+
+ struct drm_gem_object *shadow_bo;
+ uint64_t shadow_iova;
+ uint32_t *shadow;
+
+ /* True if the microcode supports the WHERE_AM_I opcode */
+ bool has_whereami;
+};
+
+#define to_a5xx_gpu(x) container_of(x, struct a5xx_gpu, base)
+
+#ifdef CONFIG_DEBUG_FS
+void a5xx_debugfs_init(struct msm_gpu *gpu, struct drm_minor *minor);
+#endif
+
+/*
+ * In order to do lockless preemption we use a simple state machine to progress
+ * through the process.
+ *
+ * PREEMPT_NONE - no preemption in progress. Next state START.
+ * PREEMPT_START - The trigger is evaulating if preemption is possible. Next
+ * states: TRIGGERED, NONE
+ * PREEMPT_ABORT - An intermediate state before moving back to NONE. Next
+ * state: NONE.
+ * PREEMPT_TRIGGERED: A preemption has been executed on the hardware. Next
+ * states: FAULTED, PENDING
+ * PREEMPT_FAULTED: A preemption timed out (never completed). This will trigger
+ * recovery. Next state: N/A
+ * PREEMPT_PENDING: Preemption complete interrupt fired - the callback is
+ * checking the success of the operation. Next state: FAULTED, NONE.
+ */
+
+enum preempt_state {
+ PREEMPT_NONE = 0,
+ PREEMPT_START,
+ PREEMPT_ABORT,
+ PREEMPT_TRIGGERED,
+ PREEMPT_FAULTED,
+ PREEMPT_PENDING,
+};
+
+/*
+ * struct a5xx_preempt_record is a shared buffer between the microcode and the
+ * CPU to store the state for preemption. The record itself is much larger
+ * (64k) but most of that is used by the CP for storage.
+ *
+ * There is a preemption record assigned per ringbuffer. When the CPU triggers a
+ * preemption, it fills out the record with the useful information (wptr, ring
+ * base, etc) and the microcode uses that information to set up the CP following
+ * the preemption. When a ring is switched out, the CP will save the ringbuffer
+ * state back to the record. In this way, once the records are properly set up
+ * the CPU can quickly switch back and forth between ringbuffers by only
+ * updating a few registers (often only the wptr).
+ *
+ * These are the CPU aware registers in the record:
+ * @magic: Must always be 0x27C4BAFC
+ * @info: Type of the record - written 0 by the CPU, updated by the CP
+ * @data: Data field from SET_RENDER_MODE or a checkpoint. Written and used by
+ * the CP
+ * @cntl: Value of RB_CNTL written by CPU, save/restored by CP
+ * @rptr: Value of RB_RPTR written by CPU, save/restored by CP
+ * @wptr: Value of RB_WPTR written by CPU, save/restored by CP
+ * @rptr_addr: Value of RB_RPTR_ADDR written by CPU, save/restored by CP
+ * @rbase: Value of RB_BASE written by CPU, save/restored by CP
+ * @counter: GPU address of the storage area for the performance counters
+ */
+struct a5xx_preempt_record {
+ uint32_t magic;
+ uint32_t info;
+ uint32_t data;
+ uint32_t cntl;
+ uint32_t rptr;
+ uint32_t wptr;
+ uint64_t rptr_addr;
+ uint64_t rbase;
+ uint64_t counter;
+};
+
+/* Magic identifier for the preemption record */
+#define A5XX_PREEMPT_RECORD_MAGIC 0x27C4BAFCUL
+
+/*
+ * Even though the structure above is only a few bytes, we need a full 64k to
+ * store the entire preemption record from the CP
+ */
+#define A5XX_PREEMPT_RECORD_SIZE (64 * 1024)
+
+/*
+ * The preemption counter block is a storage area for the value of the
+ * preemption counters that are saved immediately before context switch. We
+ * append it on to the end of the allocation for the preemption record.
+ */
+#define A5XX_PREEMPT_COUNTER_SIZE (16 * 4)
+
+
+int a5xx_power_init(struct msm_gpu *gpu);
+void a5xx_gpmu_ucode_init(struct msm_gpu *gpu);
+
+static inline int spin_usecs(struct msm_gpu *gpu, uint32_t usecs,
+ uint32_t reg, uint32_t mask, uint32_t value)
+{
+ while (usecs--) {
+ udelay(1);
+ if ((gpu_read(gpu, reg) & mask) == value)
+ return 0;
+ cpu_relax();
+ }
+
+ return -ETIMEDOUT;
+}
+
+#define shadowptr(a5xx_gpu, ring) ((a5xx_gpu)->shadow_iova + \
+ ((ring)->id * sizeof(uint32_t)))
+
+bool a5xx_idle(struct msm_gpu *gpu, struct msm_ringbuffer *ring);
+void a5xx_set_hwcg(struct msm_gpu *gpu, bool state);
+
+void a5xx_preempt_init(struct msm_gpu *gpu);
+void a5xx_preempt_hw_init(struct msm_gpu *gpu);
+void a5xx_preempt_trigger(struct msm_gpu *gpu);
+void a5xx_preempt_irq(struct msm_gpu *gpu);
+void a5xx_preempt_fini(struct msm_gpu *gpu);
+
+void a5xx_flush(struct msm_gpu *gpu, struct msm_ringbuffer *ring, bool sync);
+
+/* Return true if we are in a preempt state */
+static inline bool a5xx_in_preempt(struct a5xx_gpu *a5xx_gpu)
+{
+ int preempt_state = atomic_read(&a5xx_gpu->preempt_state);
+
+ return !(preempt_state == PREEMPT_NONE ||
+ preempt_state == PREEMPT_ABORT);
+}
+
+#endif /* __A5XX_GPU_H__ */