drivers: ipm: added IPM over IVSHMEM driver
This driver is built on top of the IVSHMEM doorbell notification mechanism providing an unified way to generate inter VM interrupts. Signed-off-by: Felipe Neves <felipe.neves@linaro.org>
This commit is contained in:
Felipe Neves
Fabio Baltieri
parent
bb8b515ffa
commit
7ca59d7bfe
6 changed files with 181 additions and 0 deletions
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@ -346,6 +346,7 @@
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/drivers/ipm/ipm_stm32_ipcc.c @arnopo
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/drivers/ipm/ipm_stm32_hsem.c @cameled
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/drivers/ipm/ipm_esp32.c @uLipe
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/drivers/ipm/ipm_ivshmem.c @uLipe
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/drivers/kscan/ @VenkatKotakonda @franciscomunoz @sjvasanth1
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/drivers/kscan/*xec* @franciscomunoz @sjvasanth1
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/drivers/kscan/*ft5336* @MaureenHelm
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@ -15,3 +15,4 @@ zephyr_library_sources_ifdef(CONFIG_IPM_STM32_HSEM ipm_stm32_hsem.c)
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zephyr_library_sources_ifdef(CONFIG_IPM_CAVS_HOST ipm_cavs_host.c)
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zephyr_library_sources_ifdef(CONFIG_ESP32_SOFT_IPM ipm_esp32.c)
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zephyr_library_sources_ifdef(CONFIG_USERSPACE ipm_handlers.c)
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zephyr_library_sources_ifdef(CONFIG_IPM_IVSHMEM ipm_ivshmem.c)
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@ -38,10 +38,21 @@ config ESP32_SOFT_IPM
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help
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Interprocessor driver for ESP32 when using AMP.
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config IPM_IVSHMEM
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bool "IPM driver based on IVSHMEM-Doorbell"
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default y
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depends on DT_HAS_LINARO_IVSHMEM_IPM_ENABLED
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depends on IVSHMEM
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depends on IVSHMEM_DOORBELL
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help
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Interprocessor driver using IVSHMEM Doorbell mechanism.
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source "drivers/ipm/Kconfig.nrfx"
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source "drivers/ipm/Kconfig.imx"
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source "drivers/ipm/Kconfig.stm32"
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source "drivers/ipm/Kconfig.intel_adsp"
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source "drivers/ipm/Kconfig.ivshmem"
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module = IPM
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module-str = ipm
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18
drivers/ipm/Kconfig.ivshmem
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18
drivers/ipm/Kconfig.ivshmem
Normal file
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@ -0,0 +1,18 @@
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# SPDX-License-Identifier: Apache-2.0
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# Copyright (c) 2023, Linaro
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if IPM_IVSHMEM
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config IPM_IVSHMEM_EVENT_LOOP_STACK_SIZE
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int "Stack size in bytes of IVSHMEM IPM Event loop task"
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default 8192
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help
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Adjust the stack size, in bytes of the ivshmem event loop task.
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config IPM_IVSHMEM_EVENT_LOOP_PRIO
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int "Priority of IVSHMEM IPM Event loop task"
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default 2
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help
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Adjust the priority of the ivshmem event loop task.
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endif
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135
drivers/ipm/ipm_ivshmem.c
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135
drivers/ipm/ipm_ivshmem.c
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@ -0,0 +1,135 @@
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/*
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* Copyright (c) 2023 Linaro.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define DT_DRV_COMPAT linaro_ivshmem_ipm
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#include <stdint.h>
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#include <string.h>
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#include <zephyr/device.h>
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#include <zephyr/drivers/ipm.h>
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#include <zephyr/drivers/virtualization/ivshmem.h>
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(ipm_ivshmem, CONFIG_IPM_LOG_LEVEL);
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K_THREAD_STACK_DEFINE(ivshmem_ev_loop_stack, CONFIG_IPM_IVSHMEM_EVENT_LOOP_STACK_SIZE);
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static struct k_thread ivshmem_ev_loop_thread;
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struct ivshmem_ipm_data {
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ipm_callback_t cb;
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void *user_data;
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};
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struct ivshmem_ipm_config {
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const struct device *ivshmem_dev;
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};
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static void ivshmem_ipm_event_loop_thread(void *arg, void *p2, void *p3)
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{
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ARG_UNUSED(p2);
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ARG_UNUSED(p3);
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unsigned int poll_signaled;
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int ivshmem_vector_rx;
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struct k_poll_signal sig;
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struct k_poll_event events[] = {
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K_POLL_EVENT_INITIALIZER(K_POLL_TYPE_SIGNAL,
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K_POLL_MODE_NOTIFY_ONLY,
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&sig),
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};
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const struct device *dev = (const struct device *)arg;
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struct ivshmem_ipm_data *dev_data = (struct ivshmem_ipm_data *)dev->data;
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struct ivshmem_ipm_config *dev_cfg = (struct ivshmem_ipm_config *)dev->config;
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k_poll_signal_init(&sig);
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int ret = ivshmem_register_handler(dev_cfg->ivshmem_dev, &sig, 0);
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if (ret < 0) {
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LOG_ERR("registering handlers must be supported: %d\n", ret);
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k_panic();
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}
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while (1) {
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LOG_DBG("%s: waiting interrupt from client...\n", __func__);
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ret = k_poll(events, ARRAY_SIZE(events), K_FOREVER);
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k_poll_signal_check(&sig, &poll_signaled, &ivshmem_vector_rx);
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/* get ready for next signal */
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k_poll_signal_reset(&sig);
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if (dev_data->cb)
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dev_data->cb(dev, dev_data->user_data, 0, NULL);
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}
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}
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static int ivshmem_ipm_send(const struct device *dev, int wait, uint32_t id,
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const void *data, int size)
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{
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ARG_UNUSED(wait);
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ARG_UNUSED(data);
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ARG_UNUSED(size);
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struct ivshmem_ipm_config *dev_cfg = (struct ivshmem_ipm_config *)dev->config;
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LOG_DBG("sending notification to the peer id 0x%x\n", id);
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return ivshmem_int_peer(dev_cfg->ivshmem_dev, id, 0);
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}
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static void ivshmem_ipm_register_callback(const struct device *dev,
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ipm_callback_t cb,
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void *user_data)
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{
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struct ivshmem_ipm_data *dev_data = (struct ivshmem_ipm_data *)dev->data;
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dev_data->cb = cb;
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dev_data->user_data = user_data;
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}
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static int ivshmem_ipm_set_enabled(const struct device *dev, int enable)
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{
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/* some subsystems needs this minimal function just return success here*/
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ARG_UNUSED(dev);
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ARG_UNUSED(enable);
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return 0;
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}
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static int ivshmem_ipm_init(const struct device *dev)
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{
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k_thread_create(&ivshmem_ev_loop_thread,
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ivshmem_ev_loop_stack,
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CONFIG_IPM_IVSHMEM_EVENT_LOOP_STACK_SIZE,
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(k_thread_entry_t)ivshmem_ipm_event_loop_thread,
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(void *)dev, NULL, NULL,
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CONFIG_IPM_IVSHMEM_EVENT_LOOP_PRIO,
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0, K_NO_WAIT);
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return 0;
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}
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static const struct ipm_driver_api ivshmem_ipm_driver_api = {
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.send = ivshmem_ipm_send,
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.register_callback = ivshmem_ipm_register_callback,
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.set_enabled = ivshmem_ipm_set_enabled
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};
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#define IPM_IVSHMEM_INIT(inst) \
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static const struct ivshmem_ipm_config ivshmem_ipm_cfg_##inst = { \
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.ivshmem_dev = \
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DEVICE_DT_GET(DT_INST_PHANDLE(inst, ivshmem))\
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}; \
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static struct ivshmem_ipm_data ivshmem_ipm_data_##inst = { \
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.cb = NULL, \
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.user_data = NULL, \
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}; \
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DEVICE_DT_INST_DEFINE(inst, \
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ivshmem_ipm_init, \
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NULL, \
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&ivshmem_ipm_data_##inst, &ivshmem_ipm_cfg_##inst, \
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POST_KERNEL, CONFIG_APPLICATION_INIT_PRIORITY, \
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&ivshmem_ipm_driver_api); \
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DT_INST_FOREACH_STATUS_OKAY(IPM_IVSHMEM_INIT);
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15
dts/bindings/ipm/linaro,ivshmem-ipm.yaml
Normal file
15
dts/bindings/ipm/linaro,ivshmem-ipm.yaml
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@ -0,0 +1,15 @@
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# Copyright (c) 2023 Linaro
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# SPDX-License-Identifier: Apache-2.0
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description: Inter processor message based on IVSHMEM
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compatible: "linaro,ivshmem-ipm"
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include: base.yaml
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properties:
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ivshmem:
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type: phandle
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required: true
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description: ivshmem device node
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