1 files changed, 469 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
new file mode 100644
index 000000000..804133df1
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
@@ -0,0 +1,469 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2014-2019 Intel Corporation
+ */
+
+#ifndef _INTEL_GUC_H_
+#define _INTEL_GUC_H_
+
+#include <linux/delay.h>
+#include <linux/iosys-map.h>
+#include <linux/xarray.h>
+
+#include "intel_guc_ct.h"
+#include "intel_guc_fw.h"
+#include "intel_guc_fwif.h"
+#include "intel_guc_log.h"
+#include "intel_guc_reg.h"
+#include "intel_guc_slpc_types.h"
+#include "intel_uc_fw.h"
+#include "intel_uncore.h"
+#include "i915_utils.h"
+#include "i915_vma.h"
+
+struct __guc_ads_blob;
+struct intel_guc_state_capture;
+
+/**
+ * struct intel_guc - Top level structure of GuC.
+ *
+ * It handles firmware loading and manages client pool. intel_guc owns an
+ * i915_sched_engine for submission.
+ */
+struct intel_guc {
+	/** @fw: the GuC firmware */
+	struct intel_uc_fw fw;
+	/** @log: sub-structure containing GuC log related data and objects */
+	struct intel_guc_log log;
+	/** @ct: the command transport communication channel */
+	struct intel_guc_ct ct;
+	/** @slpc: sub-structure containing SLPC related data and objects */
+	struct intel_guc_slpc slpc;
+	/** @capture: the error-state-capture module's data and objects */
+	struct intel_guc_state_capture *capture;
+
+	/** @sched_engine: Global engine used to submit requests to GuC */
+	struct i915_sched_engine *sched_engine;
+	/**
+	 * @stalled_request: if GuC can't process a request for any reason, we
+	 * save it until GuC restarts processing. No other request can be
+	 * submitted until the stalled request is processed.
+	 */
+	struct i915_request *stalled_request;
+	/**
+	 * @submission_stall_reason: reason why submission is stalled
+	 */
+	enum {
+		STALL_NONE,
+		STALL_REGISTER_CONTEXT,
+		STALL_MOVE_LRC_TAIL,
+		STALL_ADD_REQUEST,
+	} submission_stall_reason;
+
+	/* intel_guc_recv interrupt related state */
+	/** @irq_lock: protects GuC irq state */
+	spinlock_t irq_lock;
+	/**
+	 * @msg_enabled_mask: mask of events that are processed when receiving
+	 * an INTEL_GUC_ACTION_DEFAULT G2H message.
+	 */
+	unsigned int msg_enabled_mask;
+
+	/**
+	 * @outstanding_submission_g2h: number of outstanding GuC to Host
+	 * responses related to GuC submission, used to determine if the GT is
+	 * idle
+	 */
+	atomic_t outstanding_submission_g2h;
+
+	/** @interrupts: pointers to GuC interrupt-managing functions. */
+	struct {
+		void (*reset)(struct intel_guc *guc);
+		void (*enable)(struct intel_guc *guc);
+		void (*disable)(struct intel_guc *guc);
+	} interrupts;
+
+	/**
+	 * @submission_state: sub-structure for submission state protected by
+	 * single lock
+	 */
+	struct {
+		/**
+		 * @lock: protects everything in submission_state,
+		 * ce->guc_id.id, and ce->guc_id.ref when transitioning in and
+		 * out of zero
+		 */
+		spinlock_t lock;
+		/**
+		 * @guc_ids: used to allocate new guc_ids, single-lrc
+		 */
+		struct ida guc_ids;
+		/**
+		 * @num_guc_ids: Number of guc_ids, selftest feature to be able
+		 * to reduce this number while testing.
+		 */
+		int num_guc_ids;
+		/**
+		 * @guc_ids_bitmap: used to allocate new guc_ids, multi-lrc
+		 */
+		unsigned long *guc_ids_bitmap;
+		/**
+		 * @guc_id_list: list of intel_context with valid guc_ids but no
+		 * refs
+		 */
+		struct list_head guc_id_list;
+		/**
+		 * @destroyed_contexts: list of contexts waiting to be destroyed
+		 * (deregistered with the GuC)
+		 */
+		struct list_head destroyed_contexts;
+		/**
+		 * @destroyed_worker: worker to deregister contexts, need as we
+		 * need to take a GT PM reference and can't from destroy
+		 * function as it might be in an atomic context (no sleeping)
+		 */
+		struct work_struct destroyed_worker;
+		/**
+		 * @reset_fail_worker: worker to trigger a GT reset after an
+		 * engine reset fails
+		 */
+		struct work_struct reset_fail_worker;
+		/**
+		 * @reset_fail_mask: mask of engines that failed to reset
+		 */
+		intel_engine_mask_t reset_fail_mask;
+	} submission_state;
+
+	/**
+	 * @submission_supported: tracks whether we support GuC submission on
+	 * the current platform
+	 */
+	bool submission_supported;
+	/** @submission_selected: tracks whether the user enabled GuC submission */
+	bool submission_selected;
+	/** @submission_initialized: tracks whether GuC submission has been initialised */
+	bool submission_initialized;
+	/**
+	 * @rc_supported: tracks whether we support GuC rc on the current platform
+	 */
+	bool rc_supported;
+	/** @rc_selected: tracks whether the user enabled GuC rc */
+	bool rc_selected;
+
+	/** @ads_vma: object allocated to hold the GuC ADS */
+	struct i915_vma *ads_vma;
+	/** @ads_map: contents of the GuC ADS */
+	struct iosys_map ads_map;
+	/** @ads_regset_size: size of the save/restore regsets in the ADS */
+	u32 ads_regset_size;
+	/**
+	 * @ads_regset_count: number of save/restore registers in the ADS for
+	 * each engine
+	 */
+	u32 ads_regset_count[I915_NUM_ENGINES];
+	/** @ads_regset: save/restore regsets in the ADS */
+	struct guc_mmio_reg *ads_regset;
+	/** @ads_golden_ctxt_size: size of the golden contexts in the ADS */
+	u32 ads_golden_ctxt_size;
+	/** @ads_capture_size: size of register lists in the ADS used for error capture */
+	u32 ads_capture_size;
+	/** @ads_engine_usage_size: size of engine usage in the ADS */
+	u32 ads_engine_usage_size;
+
+	/** @lrc_desc_pool_v69: object allocated to hold the GuC LRC descriptor pool */
+	struct i915_vma *lrc_desc_pool_v69;
+	/** @lrc_desc_pool_vaddr_v69: contents of the GuC LRC descriptor pool */
+	void *lrc_desc_pool_vaddr_v69;
+
+	/**
+	 * @context_lookup: used to resolve intel_context from guc_id, if a
+	 * context is present in this structure it is registered with the GuC
+	 */
+	struct xarray context_lookup;
+
+	/** @params: Control params for fw initialization */
+	u32 params[GUC_CTL_MAX_DWORDS];
+
+	/** @send_regs: GuC's FW specific registers used for sending MMIO H2G */
+	struct {
+		u32 base;
+		unsigned int count;
+		enum forcewake_domains fw_domains;
+	} send_regs;
+
+	/** @notify_reg: register used to send interrupts to the GuC FW */
+	i915_reg_t notify_reg;
+
+	/**
+	 * @mmio_msg: notification bitmask that the GuC writes in one of its
+	 * registers when the CT channel is disabled, to be processed when the
+	 * channel is back up.
+	 */
+	u32 mmio_msg;
+
+	/** @send_mutex: used to serialize the intel_guc_send actions */
+	struct mutex send_mutex;
+
+	/**
+	 * @timestamp: GT timestamp object that stores a copy of the timestamp
+	 * and adjusts it for overflow using a worker.
+	 */
+	struct {
+		/**
+		 * @lock: Lock protecting the below fields and the engine stats.
+		 */
+		spinlock_t lock;
+
+		/**
+		 * @gt_stamp: 64 bit extended value of the GT timestamp.
+		 */
+		u64 gt_stamp;
+
+		/**
+		 * @ping_delay: Period for polling the GT timestamp for
+		 * overflow.
+		 */
+		unsigned long ping_delay;
+
+		/**
+		 * @work: Periodic work to adjust GT timestamp, engine and
+		 * context usage for overflows.
+		 */
+		struct delayed_work work;
+
+		/**
+		 * @shift: Right shift value for the gpm timestamp
+		 */
+		u32 shift;
+
+		/**
+		 * @last_stat_jiffies: jiffies at last actual stats collection time
+		 * We use this timestamp to ensure we don't oversample the
+		 * stats because runtime power management events can trigger
+		 * stats collection at much higher rates than required.
+		 */
+		unsigned long last_stat_jiffies;
+	} timestamp;
+
+#ifdef CONFIG_DRM_I915_SELFTEST
+	/**
+	 * @number_guc_id_stolen: The number of guc_ids that have been stolen
+	 */
+	int number_guc_id_stolen;
+#endif
+};
+
+static inline struct intel_guc *log_to_guc(struct intel_guc_log *log)
+{
+	return container_of(log, struct intel_guc, log);
+}
+
+static
+inline int intel_guc_send(struct intel_guc *guc, const u32 *action, u32 len)
+{
+	return intel_guc_ct_send(&guc->ct, action, len, NULL, 0, 0);
+}
+
+static
+inline int intel_guc_send_nb(struct intel_guc *guc, const u32 *action, u32 len,
+			     u32 g2h_len_dw)
+{
+	return intel_guc_ct_send(&guc->ct, action, len, NULL, 0,
+				 MAKE_SEND_FLAGS(g2h_len_dw));
+}
+
+static inline int
+intel_guc_send_and_receive(struct intel_guc *guc, const u32 *action, u32 len,
+			   u32 *response_buf, u32 response_buf_size)
+{
+	return intel_guc_ct_send(&guc->ct, action, len,
+				 response_buf, response_buf_size, 0);
+}
+
+static inline int intel_guc_send_busy_loop(struct intel_guc *guc,
+					   const u32 *action,
+					   u32 len,
+					   u32 g2h_len_dw,
+					   bool loop)
+{
+	int err;
+	unsigned int sleep_period_ms = 1;
+	bool not_atomic = !in_atomic() && !irqs_disabled();
+
+	/*
+	 * FIXME: Have caller pass in if we are in an atomic context to avoid
+	 * using in_atomic(). It is likely safe here as we check for irqs
+	 * disabled which basically all the spin locks in the i915 do but
+	 * regardless this should be cleaned up.
+	 */
+
+	/* No sleeping with spin locks, just busy loop */
+	might_sleep_if(loop && not_atomic);
+
+retry:
+	err = intel_guc_send_nb(guc, action, len, g2h_len_dw);
+	if (unlikely(err == -EBUSY && loop)) {
+		if (likely(not_atomic)) {
+			if (msleep_interruptible(sleep_period_ms))
+				return -EINTR;
+			sleep_period_ms = sleep_period_ms << 1;
+		} else {
+			cpu_relax();
+		}
+		goto retry;
+	}
+
+	return err;
+}
+
+static inline void intel_guc_to_host_event_handler(struct intel_guc *guc)
+{
+	intel_guc_ct_event_handler(&guc->ct);
+}
+
+/* GuC addresses above GUC_GGTT_TOP also don't map through the GTT */
+#define GUC_GGTT_TOP	0xFEE00000
+
+/**
+ * intel_guc_ggtt_offset() - Get and validate the GGTT offset of @vma
+ * @guc: intel_guc structure.
+ * @vma: i915 graphics virtual memory area.
+ *
+ * GuC does not allow any gfx GGTT address that falls into range
+ * [0, ggtt.pin_bias), which is reserved for Boot ROM, SRAM and WOPCM.
+ * Currently, in order to exclude [0, ggtt.pin_bias) address space from
+ * GGTT, all gfx objects used by GuC are allocated with intel_guc_allocate_vma()
+ * and pinned with PIN_OFFSET_BIAS along with the value of ggtt.pin_bias.
+ *
+ * Return: GGTT offset of the @vma.
+ */
+static inline u32 intel_guc_ggtt_offset(struct intel_guc *guc,
+					struct i915_vma *vma)
+{
+	u32 offset = i915_ggtt_offset(vma);
+
+	GEM_BUG_ON(offset < i915_ggtt_pin_bias(vma));
+	GEM_BUG_ON(range_overflows_t(u64, offset, vma->size, GUC_GGTT_TOP));
+
+	return offset;
+}
+
+void intel_guc_init_early(struct intel_guc *guc);
+void intel_guc_init_late(struct intel_guc *guc);
+void intel_guc_init_send_regs(struct intel_guc *guc);
+void intel_guc_write_params(struct intel_guc *guc);
+int intel_guc_init(struct intel_guc *guc);
+void intel_guc_fini(struct intel_guc *guc);
+void intel_guc_notify(struct intel_guc *guc);
+int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32 len,
+			u32 *response_buf, u32 response_buf_size);
+int intel_guc_to_host_process_recv_msg(struct intel_guc *guc,
+				       const u32 *payload, u32 len);
+int intel_guc_auth_huc(struct intel_guc *guc, u32 rsa_offset);
+int intel_guc_suspend(struct intel_guc *guc);
+int intel_guc_resume(struct intel_guc *guc);
+struct i915_vma *intel_guc_allocate_vma(struct intel_guc *guc, u32 size);
+int intel_guc_allocate_and_map_vma(struct intel_guc *guc, u32 size,
+				   struct i915_vma **out_vma, void **out_vaddr);
+int intel_guc_self_cfg32(struct intel_guc *guc, u16 key, u32 value);
+int intel_guc_self_cfg64(struct intel_guc *guc, u16 key, u64 value);
+
+static inline bool intel_guc_is_supported(struct intel_guc *guc)
+{
+	return intel_uc_fw_is_supported(&guc->fw);
+}
+
+static inline bool intel_guc_is_wanted(struct intel_guc *guc)
+{
+	return intel_uc_fw_is_enabled(&guc->fw);
+}
+
+static inline bool intel_guc_is_used(struct intel_guc *guc)
+{
+	GEM_BUG_ON(__intel_uc_fw_status(&guc->fw) == INTEL_UC_FIRMWARE_SELECTED);
+	return intel_uc_fw_is_available(&guc->fw);
+}
+
+static inline bool intel_guc_is_fw_running(struct intel_guc *guc)
+{
+	return intel_uc_fw_is_running(&guc->fw);
+}
+
+static inline bool intel_guc_is_ready(struct intel_guc *guc)
+{
+	return intel_guc_is_fw_running(guc) && intel_guc_ct_enabled(&guc->ct);
+}
+
+static inline void intel_guc_reset_interrupts(struct intel_guc *guc)
+{
+	guc->interrupts.reset(guc);
+}
+
+static inline void intel_guc_enable_interrupts(struct intel_guc *guc)
+{
+	guc->interrupts.enable(guc);
+}
+
+static inline void intel_guc_disable_interrupts(struct intel_guc *guc)
+{
+	guc->interrupts.disable(guc);
+}
+
+static inline int intel_guc_sanitize(struct intel_guc *guc)
+{
+	intel_uc_fw_sanitize(&guc->fw);
+	intel_guc_disable_interrupts(guc);
+	intel_guc_ct_sanitize(&guc->ct);
+	guc->mmio_msg = 0;
+
+	return 0;
+}
+
+static inline void intel_guc_enable_msg(struct intel_guc *guc, u32 mask)
+{
+	spin_lock_irq(&guc->irq_lock);
+	guc->msg_enabled_mask |= mask;
+	spin_unlock_irq(&guc->irq_lock);
+}
+
+static inline void intel_guc_disable_msg(struct intel_guc *guc, u32 mask)
+{
+	spin_lock_irq(&guc->irq_lock);
+	guc->msg_enabled_mask &= ~mask;
+	spin_unlock_irq(&guc->irq_lock);
+}
+
+int intel_guc_wait_for_idle(struct intel_guc *guc, long timeout);
+
+int intel_guc_deregister_done_process_msg(struct intel_guc *guc,
+					  const u32 *msg, u32 len);
+int intel_guc_sched_done_process_msg(struct intel_guc *guc,
+				     const u32 *msg, u32 len);
+int intel_guc_context_reset_process_msg(struct intel_guc *guc,
+					const u32 *msg, u32 len);
+int intel_guc_engine_failure_process_msg(struct intel_guc *guc,
+					 const u32 *msg, u32 len);
+int intel_guc_error_capture_process_msg(struct intel_guc *guc,
+					const u32 *msg, u32 len);
+
+struct intel_engine_cs *
+intel_guc_lookup_engine(struct intel_guc *guc, u8 guc_class, u8 instance);
+
+void intel_guc_find_hung_context(struct intel_engine_cs *engine);
+
+int intel_guc_global_policies_update(struct intel_guc *guc);
+
+void intel_guc_context_ban(struct intel_context *ce, struct i915_request *rq);
+
+void intel_guc_submission_reset_prepare(struct intel_guc *guc);
+void intel_guc_submission_reset(struct intel_guc *guc, intel_engine_mask_t stalled);
+void intel_guc_submission_reset_finish(struct intel_guc *guc);
+void intel_guc_submission_cancel_requests(struct intel_guc *guc);
+
+void intel_guc_load_status(struct intel_guc *guc, struct drm_printer *p);
+
+void intel_guc_write_barrier(struct intel_guc *guc);
+
+void intel_guc_dump_time_info(struct intel_guc *guc, struct drm_printer *p);
+
+#endif