Merge "msm: mhi_dev: Redesign MHI driver async path" (d88fc1fc) · Commits · e / devices / android_kernel_fairphone_FP3

drivers/platform/msm/mhi_dev/mhi.c

+515 −236

File changed.

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drivers/platform/msm/mhi_dev/mhi.h

+23 −9

Original line number	Original line	Diff line number	Diff line
	/* Copyright (c) 2015-2019, The Linux Foundation. All rights reserved.		/* Copyright (c) 2015-2020, The Linux Foundation. All rights reserved.
	*		*
	* This program is free software; you can redistribute it and/or modify		* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 and		* it under the terms of the GNU General Public License version 2 and
	@@ -277,10 +277,11 @@ struct mhi_config {
	#define TRB_MAX_DATA_SIZE 8192		#define TRB_MAX_DATA_SIZE 8192
	#define MHI_CTRL_STATE 100		#define MHI_CTRL_STATE 100

	/maximum trasnfer completion events buffer/		/* maximum transfer completion events buffer */
	#define MAX_TR_EVENTS 50		#define NUM_TR_EVENTS_DEFAULT 128
	/maximum event requests /
	#define MHI_MAX_EVT_REQ 50		/* Set flush threshold to 80% of event buf size */
			#define MHI_CMPL_EVT_FLUSH_THRSHLD(n) ((n * 8) / 10)

	/* Possible ring element types */		/* Possible ring element types */
	union mhi_dev_ring_element_type {		union mhi_dev_ring_element_type {
	@@ -418,6 +419,11 @@ struct ring_cache_req {

	struct event_req {		struct event_req {
	union mhi_dev_ring_element_type *tr_events;		union mhi_dev_ring_element_type *tr_events;
			/*
			* Start index of the completion event buffer segment
			* to be flushed to host
			*/
			u32 start;
	u32 num_events;		u32 num_events;
	dma_addr_t dma;		dma_addr_t dma;
	u32 dma_len;		u32 dma_len;
	@@ -443,14 +449,23 @@ struct mhi_dev_channel {
	struct mutex ch_lock;		struct mutex ch_lock;
	/* client which the current inbound/outbound message is for */		/* client which the current inbound/outbound message is for */
	struct mhi_dev_client *active_client;		struct mhi_dev_client *active_client;
			/* Pointer to completion event buffer */
			union mhi_dev_ring_element_type *tr_events;
			/* Indices for completion event buffer */
			uint32_t evt_buf_rp;
			uint32_t evt_buf_wp;
			uint32_t evt_buf_size;
	/*		/*
	* Pointer to event request structs used to temporarily store		* Pointer to a block of event request structs used to temporarily store
	* completion events and meta data before sending them to host		* completion events and meta data before sending them to host
	*/		*/
	struct event_req *ereqs;		struct event_req *ereqs;
	/* Pointer to completion event buffers */		/* Linked list head for event request structs */
	union mhi_dev_ring_element_type *tr_events;
	struct list_head event_req_buffers;		struct list_head event_req_buffers;
			uint32_t evt_req_size;
			/* Linked list head for event request structs to be flushed */
			struct list_head flush_event_req_buffers;
			/* Pointer to the currently used event request struct */
	struct event_req *curr_ereq;		struct event_req *curr_ereq;

	/* current TRE being processed */		/* current TRE being processed */
	@@ -533,7 +548,6 @@ struct mhi_dev {
	u32 ifc_id;		u32 ifc_id;
	struct ep_pcie_hw *phandle;		struct ep_pcie_hw *phandle;
	struct work_struct pcie_event;		struct work_struct pcie_event;
	struct ep_pcie_msi_config msi_cfg;

	atomic_t write_active;		atomic_t write_active;
	atomic_t is_suspended;		atomic_t is_suspended;