1 files changed, 190 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.h b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
new file mode 100644
index 000000000..e034935b3
--- /dev/null
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
@@ -0,0 +1,190 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2017 The Linux Foundation. All rights reserved. */
+
+#ifndef _A6XX_GMU_H_
+#define _A6XX_GMU_H_
+
+#include <linux/iopoll.h>
+#include <linux/interrupt.h>
+#include "msm_drv.h"
+#include "a6xx_hfi.h"
+
+struct a6xx_gmu_bo {
+	struct drm_gem_object *obj;
+	void *virt;
+	size_t size;
+	u64 iova;
+};
+
+/*
+ * These define the different GMU wake up options - these define how both the
+ * CPU and the GMU bring up the hardware
+ */
+
+/* THe GMU has already been booted and the rentention registers are active */
+#define GMU_WARM_BOOT 0
+
+/* the GMU is coming up for the first time or back from a power collapse */
+#define GMU_COLD_BOOT 1
+
+/*
+ * These define the level of control that the GMU has - the higher the number
+ * the more things that the GMU hardware controls on its own.
+ */
+
+/* The GMU does not do any idle state management */
+#define GMU_IDLE_STATE_ACTIVE 0
+
+/* The GMU manages SPTP power collapse */
+#define GMU_IDLE_STATE_SPTP 2
+
+/* The GMU does automatic IFPC (intra-frame power collapse) */
+#define GMU_IDLE_STATE_IFPC 3
+
+struct a6xx_gmu {
+	struct device *dev;
+
+	/* For serializing communication with the GMU: */
+	struct mutex lock;
+
+	struct msm_gem_address_space *aspace;
+
+	void * __iomem mmio;
+	void * __iomem rscc;
+
+	int hfi_irq;
+	int gmu_irq;
+
+	struct device *gxpd;
+
+	int idle_level;
+
+	struct a6xx_gmu_bo hfi;
+	struct a6xx_gmu_bo debug;
+	struct a6xx_gmu_bo icache;
+	struct a6xx_gmu_bo dcache;
+	struct a6xx_gmu_bo dummy;
+	struct a6xx_gmu_bo log;
+
+	int nr_clocks;
+	struct clk_bulk_data *clocks;
+	struct clk *core_clk;
+	struct clk *hub_clk;
+
+	/* current performance index set externally */
+	int current_perf_index;
+
+	int nr_gpu_freqs;
+	unsigned long gpu_freqs[16];
+	u32 gx_arc_votes[16];
+
+	int nr_gmu_freqs;
+	unsigned long gmu_freqs[4];
+	u32 cx_arc_votes[4];
+
+	unsigned long freq;
+
+	struct a6xx_hfi_queue queues[2];
+
+	bool initialized;
+	bool hung;
+	bool legacy; /* a618 or a630 */
+};
+
+static inline u32 gmu_read(struct a6xx_gmu *gmu, u32 offset)
+{
+	return msm_readl(gmu->mmio + (offset << 2));
+}
+
+static inline void gmu_write(struct a6xx_gmu *gmu, u32 offset, u32 value)
+{
+	msm_writel(value, gmu->mmio + (offset << 2));
+}
+
+static inline void
+gmu_write_bulk(struct a6xx_gmu *gmu, u32 offset, const u32 *data, u32 size)
+{
+	memcpy_toio(gmu->mmio + (offset << 2), data, size);
+	wmb();
+}
+
+static inline void gmu_rmw(struct a6xx_gmu *gmu, u32 reg, u32 mask, u32 or)
+{
+	u32 val = gmu_read(gmu, reg);
+
+	val &= ~mask;
+
+	gmu_write(gmu, reg, val | or);
+}
+
+static inline u64 gmu_read64(struct a6xx_gmu *gmu, u32 lo, u32 hi)
+{
+	u64 val;
+
+	val = (u64) msm_readl(gmu->mmio + (lo << 2));
+	val |= ((u64) msm_readl(gmu->mmio + (hi << 2)) << 32);
+
+	return val;
+}
+
+#define gmu_poll_timeout(gmu, addr, val, cond, interval, timeout) \
+	readl_poll_timeout((gmu)->mmio + ((addr) << 2), val, cond, \
+		interval, timeout)
+
+static inline u32 gmu_read_rscc(struct a6xx_gmu *gmu, u32 offset)
+{
+	return msm_readl(gmu->rscc + (offset << 2));
+}
+
+static inline void gmu_write_rscc(struct a6xx_gmu *gmu, u32 offset, u32 value)
+{
+	msm_writel(value, gmu->rscc + (offset << 2));
+}
+
+#define gmu_poll_timeout_rscc(gmu, addr, val, cond, interval, timeout) \
+	readl_poll_timeout((gmu)->rscc + ((addr) << 2), val, cond, \
+		interval, timeout)
+
+/*
+ * These are the available OOB (out of band requests) to the GMU where "out of
+ * band" means that the CPU talks to the GMU directly and not through HFI.
+ * Normally this works by writing a ITCM/DTCM register and then triggering a
+ * interrupt (the "request" bit) and waiting for an acknowledgment (the "ack"
+ * bit). The state is cleared by writing the "clear' bit to the GMU interrupt.
+ *
+ * These are used to force the GMU/GPU to stay on during a critical sequence or
+ * for hardware workarounds.
+ */
+
+enum a6xx_gmu_oob_state {
+	/*
+	 * Let the GMU know that a boot or slumber operation has started. The value in
+	 * REG_A6XX_GMU_BOOT_SLUMBER_OPTION lets the GMU know which operation we are
+	 * doing
+	 */
+	GMU_OOB_BOOT_SLUMBER = 0,
+	/*
+	 * Let the GMU know to not turn off any GPU registers while the CPU is in a
+	 * critical section
+	 */
+	GMU_OOB_GPU_SET,
+	/*
+	 * Set a new power level for the GPU when the CPU is doing frequency scaling
+	 */
+	GMU_OOB_DCVS_SET,
+	/*
+	 * Used to keep the GPU on for CPU-side reads of performance counters.
+	 */
+	GMU_OOB_PERFCOUNTER_SET,
+};
+
+void a6xx_hfi_init(struct a6xx_gmu *gmu);
+int a6xx_hfi_start(struct a6xx_gmu *gmu, int boot_state);
+void a6xx_hfi_stop(struct a6xx_gmu *gmu);
+int a6xx_hfi_send_prep_slumber(struct a6xx_gmu *gmu);
+int a6xx_hfi_set_freq(struct a6xx_gmu *gmu, int index);
+
+bool a6xx_gmu_gx_is_on(struct a6xx_gmu *gmu);
+bool a6xx_gmu_sptprac_is_on(struct a6xx_gmu *gmu);
+
+#endif