drivers: i3c: add controller handoff support (653589c5) · Commits · Wenxi XU / zephyr

drivers/i3c/CMakeLists.txt

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		@@ -11,6 +11,14 @@ zephyr_library_sources(
		i3c_common.c
		)

		if(CONFIG_I3C_NUM_OF_DESC_MEM_SLABS GREATER 0)
		zephyr_library_sources(i3c_mem_slab.c)
		endif()

		if(CONFIG_I3C_I2C_NUM_OF_DESC_MEM_SLABS GREATER 0)
		zephyr_library_sources(i3c_i2c_mem_slab.c)
		endif()

		zephyr_library_sources_ifdef(
		CONFIG_USERSPACE
		i3c_handlers.c

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		@@ -117,6 +117,22 @@ config I3C_INIT_RSTACT
		This determines whether the bus initialization routine
		sends a reset action command to I3C targets.

		config I3C_NUM_OF_DESC_MEM_SLABS
		int "Number of I3C Device Descriptors Mem Slabs"
		default 3
		help
		This is the number of memory slabs allocated from when
		there is a device encounted through ENTDAA or DEFTGTS that
		is not within known I3C devices.

		config I3C_I2C_NUM_OF_DESC_MEM_SLABS
		int "Number of I2C Device Descriptors Mem Slabs"
		default 3
		help
		This is the number of memory slabs allocated from when
		there is a device encounted through DEFTGTS that is not
		within known I2C devices.

		config I3C_RTIO
		bool "I3C RTIO API"
		select EXPERIMENTAL

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		/*
		* Copyright (c) 2024 Meta Platforms
		*
		* SPDX-License-Identifier: Apache-2.0
		*/

		#include <string.h>
		#include <stdlib.h>

		#include <zephyr/drivers/i3c.h>

		#include <zephyr/logging/log.h>
		LOG_MODULE_DECLARE(i3c, CONFIG_I3C_LOG_LEVEL);

		K_MEM_SLAB_DEFINE(i3c_i2c_device_desc_pool, sizeof(struct i3c_i2c_device_desc),
		CONFIG_I3C_I2C_NUM_OF_DESC_MEM_SLABS, 4);

		struct i3c_i2c_device_desc *i3c_i2c_device_desc_alloc(void)
		{
		struct i3c_i2c_device_desc *desc;

		if (k_mem_slab_alloc(&i3c_i2c_device_desc_pool, (void **)&desc, K_NO_WAIT) == 0) {
		memset(desc, 0, sizeof(struct i3c_i2c_device_desc));
		LOG_INF("I2C Device Desc allocated - %d free",
		k_mem_slab_num_free_get(&i3c_i2c_device_desc_pool));
		} else {
		LOG_WRN("No memory left for I2C descriptors");
		}

		return desc;
		}

		void i3c_i2c_device_desc_free(struct i3c_i2c_device_desc *desc)
		{
		k_mem_slab_free(&i3c_i2c_device_desc_pool, (void *)desc);
		LOG_DBG("I2C Device Desc freed");
		}

		bool i3c_i2c_device_desc_in_pool(struct i3c_i2c_device_desc *desc)
		{
		const char p = (const char )desc;
		ptrdiff_t offset = p - i3c_i2c_device_desc_pool.buffer;

		return (offset >= 0) &&
		(offset < (i3c_i2c_device_desc_pool.info.block_size *
		i3c_i2c_device_desc_pool.info.num_blocks)) &&
		((offset % i3c_i2c_device_desc_pool.info.block_size) == 0);
		}