msm: sps: add SPS driver snapshot (eebad663) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/platform/msm/Kconfig

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		@@ -21,4 +21,35 @@ config QPNP_REVID
		numbers in the kernel log along with the PMIC option status. The PMIC
		type is mapped to a QTI chip part number and logged as well.

		config SPS
		bool "SPS support"
		select GENERIC_ALLOCATOR
		help
		The SPS (Smart Peripheral Switch) is a DMA engine.
		It can move data in the following modes:
		1. Peripheral-to-Peripheral.
		2. Peripheral-to-Memory.
		3. Memory-to-Memory.

		config SPS_SUPPORT_BAMDMA
		bool "SPS support BAM DMA"
		depends on SPS
		default n
		help
		The BAM-DMA is used for Memory-to-Memory transfers.
		The main use cases is RPC between processors.
		The BAM-DMA hardware has 2 registers sets:
		1. A BAM HW like all the peripherals.
		2. A DMA channel configuration (i.e. channel priority).

		config SPS_SUPPORT_NDP_BAM
		bool "SPS support NDP BAM"
		depends on SPS
		default n
		help
		No-Data-Path BAM is used to improve BAM performance.
		NDP BAMs enables peripherals with fast fabric connectivity
		to do the actual data transfer themselves, instead of the
		BAM.

		endmenu

drivers/platform/msm/Makefile

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		@@ -6,3 +6,4 @@

		obj-$(CONFIG_MSM_EXT_DISPLAY) += msm_ext_display.o
		obj-$(CONFIG_QPNP_REVID) += qpnp-revid.o
		obj-$(CONFIG_SPS) += sps/

drivers/platform/msm/sps/Makefile

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		# SPDX-License-Identifier: GPL-2.0
		# Makefile for SPS BAM driver
		#
		obj-y += bam.o sps_bam.o sps.o sps_dma.o sps_map.o sps_mem.o sps_rm.o

drivers/platform/msm/sps/bam.c

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File added.

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drivers/platform/msm/sps/bam.h

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		/* SPDX-License-Identifier: GPL-2.0 */
		/*
		* Copyright (c) 2011-2018, The Linux Foundation. All rights reserved.
		*/
		/* Bus-Access-Manager (BAM) Hardware manager functions API. */

		#ifndef _BAM_H_
		#define _BAM_H_

		#include <linux/types.h> /* u32 */
		#include <linux/io.h> /* ioread32() */
		#include <linux/bitops.h> /* find_first_bit() */
		#include "spsi.h"

		/* Pipe mode */
		enum bam_pipe_mode {
		BAM_PIPE_MODE_BAM2BAM = 0, /* BAM to BAM */
		BAM_PIPE_MODE_SYSTEM = 1, /* BAM to/from System Memory */
		};

		/* Pipe direction */
		enum bam_pipe_dir {
		/* The Pipe Reads data from data-fifo or system-memory */
		BAM_PIPE_CONSUMER = 0,
		/* The Pipe Writes data to data-fifo or system-memory */
		BAM_PIPE_PRODUCER = 1,
		};

		/* Stream mode Type */
		enum bam_stream_mode {
		BAM_STREAM_MODE_DISABLE = 0,
		BAM_STREAM_MODE_ENABLE = 1,
		};

		/* NWD written Type */
		enum bam_write_nwd {
		BAM_WRITE_NWD_DISABLE = 0,
		BAM_WRITE_NWD_ENABLE = 1,
		};


		/* Enable Type */
		enum bam_enable {
		BAM_DISABLE = 0,
		BAM_ENABLE = 1,
		};

		/* Pipe timer mode */
		enum bam_pipe_timer_mode {
		BAM_PIPE_TIMER_ONESHOT = 0,
		BAM_PIPE_TIMER_PERIODIC = 1,
		};

		struct transfer_descriptor {
		u32 addr; /* Buffer physical address */
		u32 size:16; /* Buffer size in bytes */
		u32 flags:16; /* Flag bitmask (see SPS_IOVEC_FLAG_ #defines) */
		} __packed;

		/* BAM pipe initialization parameters */
		struct bam_pipe_parameters {
		u16 event_threshold;
		u32 pipe_irq_mask;
		enum bam_pipe_dir dir;
		enum bam_pipe_mode mode;
		enum bam_write_nwd write_nwd;
		phys_addr_t desc_base; /* Physical address of descriptor FIFO */
		u32 desc_size; /* Size (bytes) of descriptor FIFO */
		u32 lock_group; /* The lock group this pipe belongs to */
		enum bam_stream_mode stream_mode;
		u32 ee; /* BAM execution environment index */

		/* The following are only valid if mode is BAM2BAM */
		u32 peer_phys_addr;
		u32 peer_pipe;
		phys_addr_t data_base; /* Physical address of data FIFO */
		u32 data_size; /* Size (bytes) of data FIFO */
		};

		/**
		* Initialize a BAM device
		*
		* This function initializes a BAM device.
		*
		* @base - BAM virtual base address.
		*
		* @ee - BAM execution environment index
		*
		* @summing_threshold - summing threshold (global for all pipes)
		*
		* @irq_mask - error interrupts mask
		*
		* @version - return BAM hardware version
		*
		* @num_pipes - return number of pipes
		*
		* @options - BAM configuration options
		*
		* @return 0 on success, negative value on error
		*
		*/
		int bam_init(void *base,
		u32 ee,
		u16 summing_threshold,
		u32 irq_mask, u32 *version,
		u32 *num_pipes, u32 options);

		/**
		* Initialize BAM device security execution environment
		*
		* @base - BAM virtual base address.
		*
		* @ee - BAM execution environment index
		*
		* @vmid - virtual master identifier
		*
		* @pipe_mask - bit mask of pipes to assign to EE
		*
		* @return 0 on success, negative value on error
		*
		*/
		int bam_security_init(void *base, u32 ee, u32 vmid, u32 pipe_mask);

		/**
		* Check a BAM device
		*
		* This function verifies that a BAM device is enabled and gathers
		* the hardware configuration.
		*
		* @base - BAM virtual base address.
		*
		* @version - return BAM hardware version
		*
		* @ee - BAM execution environment index
		*
		* @num_pipes - return number of pipes
		*
		* @return 0 on success, negative value on error
		*
		*/
		int bam_check(void base, u32 version, u32 ee, u32 *num_pipes);

		/**
		* Disable a BAM device
		*
		* This function disables a BAM device.
		*
		* @base - BAM virtual base address.
		*
		* @ee - BAM execution environment index
		*
		*/
		void bam_exit(void *base, u32 ee);

		/**
		* This function prints BAM register content
		* including TEST_BUS and PIPE register content.
		*
		* @base - BAM virtual base address.
		*
		* @ee - BAM execution environment index
		*/
		void bam_output_register_content(void *base, u32 ee);


		/**
		* Get BAM IRQ source and clear global IRQ status
		*
		* This function gets BAM IRQ source.
		* Clear global IRQ status if it is non-zero.
		*
		* @base - BAM virtual base address.
		*
		* @ee - BAM execution environment index
		*
		* @mask - active pipes mask.
		*
		* @case - callback case.
		*
		* @return IRQ status
		*
		*/
		u32 bam_check_irq_source(void *base, u32 ee, u32 mask,
		enum sps_callback_case *cb_case);


		/**
		* Initialize a BAM pipe
		*
		* This function initializes a BAM pipe.
		*
		* @base - BAM virtual base address.
		*
		* @pipe - pipe index
		*
		* @param - bam pipe parameters.
		*
		* @ee - BAM execution environment index
		*
		* @return 0 on success, negative value on error
		*
		*/
		int bam_pipe_init(void base, u32 pipe, struct bam_pipe_parameters param,
		u32 ee);

		/**
		* Reset the BAM pipe
		*
		* This function resets the BAM pipe.
		*
		* @base - BAM virtual base address.
		*
		* @pipe - pipe index
		*
		* @ee - BAM execution environment index
		*
		*/
		void bam_pipe_exit(void *base, u32 pipe, u32 ee);

		/**
		* Enable a BAM pipe
		*
		* This function enables a BAM pipe.
		*
		* @base - BAM virtual base address.
		*
		* @pipe - pipe index
		*
		*/
		void bam_pipe_enable(void *base, u32 pipe);

		/**
		* Disable a BAM pipe
		*
		* This function disables a BAM pipe.
		*
		* @base - BAM virtual base address.
		*
		* @pipe - pipe index
		*
		*/
		void bam_pipe_disable(void *base, u32 pipe);

		/**
		* Get a BAM pipe enable state
		*
		* This function determines if a BAM pipe is enabled.
		*
		* @base - BAM virtual base address.
		*
		* @pipe - pipe index
		*
		* @return true if enabled, false if disabled
		*
		*/
		int bam_pipe_is_enabled(void *base, u32 pipe);

		/**
		* Configure interrupt for a BAM pipe
		*
		* This function configures the interrupt for a BAM pipe.
		*
		* @base - BAM virtual base address.
		*
		* @pipe - pipe index
		*
		* @irq_en - enable or disable interrupt
		*
		* @src_mask - interrupt source mask, set regardless of whether
		* interrupt is disabled
		*
		* @ee - BAM execution environment index
		*
		*/
		void bam_pipe_set_irq(void *base, u32 pipe, enum bam_enable irq_en,
		u32 src_mask, u32 ee);

		/**
		* Configure a BAM pipe for satellite MTI use
		*
		* This function configures a BAM pipe for satellite MTI use.
		*
		* @base - BAM virtual base address.
		*
		* @pipe - pipe index
		*
		* @irq_gen_addr - physical address written to generate MTI
		*
		* @ee - BAM execution environment index
		*
		*/
		void bam_pipe_satellite_mti(void *base, u32 pipe, u32 irq_gen_addr, u32 ee);

		/**
		* Configure MTI for a BAM pipe
		*
		* This function configures the interrupt for a BAM pipe.
		*
		* @base - BAM virtual base address.
		*
		* @pipe - pipe index
		*
		* @irq_en - enable or disable interrupt
		*
		* @src_mask - interrupt source mask, set regardless of whether
		* interrupt is disabled
		*
		* @irq_gen_addr - physical address written to generate MTI
		*
		*/
		void bam_pipe_set_mti(void *base, u32 pipe, enum bam_enable irq_en,
		u32 src_mask, u32 irq_gen_addr);

		/**
		* Get and Clear BAM pipe IRQ status
		*
		* This function gets and clears BAM pipe IRQ status.
		*
		* @base - BAM virtual base address.
		*
		* @pipe - pipe index
		*
		* @return IRQ status
		*
		*/
		u32 bam_pipe_get_and_clear_irq_status(void *base, u32 pipe);

		/**
		* Set write offset for a BAM pipe
		*
		* This function sets the write offset for a BAM pipe. This is
		* the offset that is maintained by software in system mode.
		*
		* @base - BAM virtual base address.
		*
		* @pipe - pipe index
		*
		* @next_write - descriptor FIFO write offset
		*
		*/
		void bam_pipe_set_desc_write_offset(void *base, u32 pipe, u32 next_write);

		/**
		* Get write offset for a BAM pipe
		*
		* This function gets the write offset for a BAM pipe. This is
		* the offset that is maintained by the pipe's peer pipe or by software.
		*
		* @base - BAM virtual base address.
		*
		* @pipe - pipe index
		*
		* @return descriptor FIFO write offset
		*
		*/
		u32 bam_pipe_get_desc_write_offset(void *base, u32 pipe);

		/**
		* Get read offset for a BAM pipe
		*
		* This function gets the read offset for a BAM pipe. This is
		* the offset that is maintained by the pipe in system mode.
		*
		* @base - BAM virtual base address.
		*
		* @pipe - pipe index
		*
		* @return descriptor FIFO read offset
		*
		*/
		u32 bam_pipe_get_desc_read_offset(void *base, u32 pipe);

		/**
		* Configure inactivity timer count for a BAM pipe
		*
		* This function configures the inactivity timer count for a BAM pipe.
		*
		* @base - BAM virtual base address.
		*
		* @pipe - pipe index
		*
		* @mode - timer operating mode
		*
		* @timeout_count - timeout count
		*
		*/
		void bam_pipe_timer_config(void *base, u32 pipe,
		enum bam_pipe_timer_mode mode,
		u32 timeout_count);

		/**
		* Reset inactivity timer for a BAM pipe
		*
		* This function resets the inactivity timer count for a BAM pipe.
		*
		* @base - BAM virtual base address.
		*
		* @pipe - pipe index
		*
		*/
		void bam_pipe_timer_reset(void *base, u32 pipe);

		/**
		* Get inactivity timer count for a BAM pipe
		*
		* This function gets the inactivity timer count for a BAM pipe.
		*
		* @base - BAM virtual base address.
		*
		* @pipe - pipe index
		*
		* @return inactivity timer count
		*
		*/
		u32 bam_pipe_timer_get_count(void *base, u32 pipe);

		/*
		* bam_pipe_check_zlt - Check if the last desc is ZLT.
		* @base: BAM virtual address
		* @pipe: pipe index
		*
		* This function checks if the last desc in the desc FIFO is a ZLT desc.
		*
		* @return true if the last desc in the desc FIFO is a ZLT desc. Otherwise
		* return false.
		*/
		bool bam_pipe_check_zlt(void *base, u32 pipe);

		/*
		* bam_pipe_check_pipe_empty - Check if desc FIFO is empty.
		* @base: BAM virtual address
		* @pipe: pipe index
		*
		* This function checks if the desc FIFO of this pipe is empty.
		*
		* @return true if desc FIFO is empty. Otherwise return false.
		*/
		bool bam_pipe_check_pipe_empty(void *base, u32 pipe);
		#endif /* _BAM_H_ */