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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/drivers/soc/qcom/rpmh-internal.h
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@@ -8,6 +8,7 @@
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 #define __RPM_INTERNAL_H__
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 #include <linux/bitmap.h>
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+#include <linux/wait.h>
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 #include <soc/qcom/tcs.h>
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 #define TCS_TYPE_NR			4
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@@ -22,16 +23,23 @@
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  * struct tcs_group: group of Trigger Command Sets (TCS) to send state requests
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  * to the controller
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  *
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- * @drv:       the controller
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- * @type:      type of the TCS in this group - active, sleep, wake
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- * @mask:      mask of the TCSes relative to all the TCSes in the RSC
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- * @offset:    start of the TCS group relative to the TCSes in the RSC
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- * @num_tcs:   number of TCSes in this type
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- * @ncpt:      number of commands in each TCS
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- * @lock:      lock for synchronizing this TCS writes
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- * @req:       requests that are sent from the TCS
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- * @cmd_cache: flattened cache of cmds in sleep/wake TCS
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- * @slots:     indicates which of @cmd_addr are occupied
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+ * @drv:       The controller.
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+ * @type:      Type of the TCS in this group - active, sleep, wake.
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+ * @mask:      Mask of the TCSes relative to all the TCSes in the RSC.
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+ * @offset:    Start of the TCS group relative to the TCSes in the RSC.
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+ * @num_tcs:   Number of TCSes in this type.
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+ * @ncpt:      Number of commands in each TCS.
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+ * @req:       Requests that are sent from the TCS; only used for ACTIVE_ONLY
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+ *             transfers (could be on a wake/sleep TCS if we are borrowing for
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+ *             an ACTIVE_ONLY transfer).
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+ *             Start: grab drv->lock, set req, set tcs_in_use, drop drv->lock,
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+ *                    trigger
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+ *             End: get irq, access req,
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+ *                  grab drv->lock, clear tcs_in_use, drop drv->lock
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+ * @slots:     Indicates which of @cmd_addr are occupied; only used for
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+ *             SLEEP / WAKE TCSs.  Things are tightly packed in the
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+ *             case that (ncpt < MAX_CMDS_PER_TCS).  That is if ncpt = 2 and
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+ *             MAX_CMDS_PER_TCS = 16 then bit[2] = the first bit in 2nd TCS.
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  */
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 struct tcs_group {
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 	struct rsc_drv *drv;
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@@ -40,9 +48,7 @@
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 	u32 offset;
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 	int num_tcs;
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 	int ncpt;
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-	spinlock_t lock;
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 	const struct tcs_request *req[MAX_TCS_PER_TYPE];
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-	u32 *cmd_cache;
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 	DECLARE_BITMAP(slots, MAX_TCS_SLOTS);
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 };
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@@ -84,31 +90,47 @@
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  * struct rsc_drv: the Direct Resource Voter (DRV) of the
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  * Resource State Coordinator controller (RSC)
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  *
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- * @name:       controller identifier
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- * @tcs_base:   start address of the TCS registers in this controller
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- * @id:         instance id in the controller (Direct Resource Voter)
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- * @num_tcs:    number of TCSes in this DRV
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- * @tcs:        TCS groups
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- * @tcs_in_use: s/w state of the TCS
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- * @lock:       synchronize state of the controller
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- * @client:     handle to the DRV's client.
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+ * @name:               Controller identifier.
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+ * @tcs_base:           Start address of the TCS registers in this controller.
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+ * @id:                 Instance id in the controller (Direct Resource Voter).
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+ * @num_tcs:            Number of TCSes in this DRV.
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+ * @rsc_pm:             CPU PM notifier for controller.
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+ *                      Used when solver mode is not present.
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+ * @cpus_in_pm:         Number of CPUs not in idle power collapse.
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+ *                      Used when solver mode is not present.
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+ * @tcs:                TCS groups.
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+ * @tcs_in_use:         S/W state of the TCS; only set for ACTIVE_ONLY
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+ *                      transfers, but might show a sleep/wake TCS in use if
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+ *                      it was borrowed for an active_only transfer.  You
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+ *                      must hold the lock in this struct (AKA drv->lock) in
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+ *                      order to update this.
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+ * @lock:               Synchronize state of the controller.  If RPMH's cache
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+ *                      lock will also be held, the order is: drv->lock then
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+ *                      cache_lock.
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+ * @tcs_wait:           Wait queue used to wait for @tcs_in_use to free up a
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+ *                      slot
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+ * @client:             Handle to the DRV's client.
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  */
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 struct rsc_drv {
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 	const char *name;
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 	void __iomem *tcs_base;
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 	int id;
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 	int num_tcs;
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+	struct notifier_block rsc_pm;
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+	atomic_t cpus_in_pm;
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 	struct tcs_group tcs[TCS_TYPE_NR];
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 	DECLARE_BITMAP(tcs_in_use, MAX_TCS_NR);
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 	spinlock_t lock;
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+	wait_queue_head_t tcs_wait;
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 	struct rpmh_ctrlr client;
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 };
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 int rpmh_rsc_send_data(struct rsc_drv *drv, const struct tcs_request *msg);
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 int rpmh_rsc_write_ctrl_data(struct rsc_drv *drv,
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 			     const struct tcs_request *msg);
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-int rpmh_rsc_invalidate(struct rsc_drv *drv);
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+void rpmh_rsc_invalidate(struct rsc_drv *drv);
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 void rpmh_tx_done(const struct tcs_request *msg, int r);
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+int rpmh_flush(struct rpmh_ctrlr *ctrlr);
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 #endif /* __RPM_INTERNAL_H__ */