Hi,
On 27.12.2022 16:34, Oded Gabbay wrote:
> On Thu, Dec 8, 2022 at 1:08 PM Jacek Lawrynowicz
> <jacek.lawrynowicz@xxxxxxxxxxxxxxx> wrote:
>>
>> The IPC driver is used to send and receive messages to/from firmware
>> running on the VPU.
>>
>> The only supported IPC message format is Job Submission Model (JSM)
>> defined in vpu_jsm_api.h header.
>>
>> Co-developed-by: Andrzej Kacprowski <andrzej.kacprowski@xxxxxxxxxxxxxxx>
>> Signed-off-by: Andrzej Kacprowski <andrzej.kacprowski@xxxxxxxxxxxxxxx>
>> Co-developed-by: Krystian Pradzynski <krystian.pradzynski@xxxxxxxxxxxxxxx>
>> Signed-off-by: Krystian Pradzynski <krystian.pradzynski@xxxxxxxxxxxxxxx>
>> Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@xxxxxxxxxxxxxxx>
>> ---
>> drivers/accel/ivpu/Makefile | 2 +
>> drivers/accel/ivpu/ivpu_drv.c | 13 +
>> drivers/accel/ivpu/ivpu_drv.h | 2 +
>> drivers/accel/ivpu/ivpu_hw_mtl.c | 4 +
>> drivers/accel/ivpu/ivpu_ipc.c | 508 +++++++++++++++
>> drivers/accel/ivpu/ivpu_ipc.h | 93 +++
>> drivers/accel/ivpu/ivpu_jsm_msg.c | 170 +++++
>> drivers/accel/ivpu/ivpu_jsm_msg.h | 23 +
>> drivers/accel/ivpu/vpu_jsm_api.h | 999 ++++++++++++++++++++++++++++++
>> 9 files changed, 1814 insertions(+)
>> create mode 100644 drivers/accel/ivpu/ivpu_ipc.c
>> create mode 100644 drivers/accel/ivpu/ivpu_ipc.h
>> create mode 100644 drivers/accel/ivpu/ivpu_jsm_msg.c
>> create mode 100644 drivers/accel/ivpu/ivpu_jsm_msg.h
>> create mode 100644 drivers/accel/ivpu/vpu_jsm_api.h
>>
>> diff --git a/drivers/accel/ivpu/Makefile b/drivers/accel/ivpu/Makefile
>> index 1b4b24ebf5ea..1fe3ad6c2c21 100644
>> --- a/drivers/accel/ivpu/Makefile
>> +++ b/drivers/accel/ivpu/Makefile
>> @@ -5,6 +5,8 @@ intel_vpu-y := \
>> ivpu_drv.o \
>> ivpu_gem.o \
>> ivpu_hw_mtl.o \
>> + ivpu_ipc.o \
>> + ivpu_jsm_msg.o \
>> ivpu_mmu.o \
>> ivpu_mmu_context.o
>>
>> diff --git a/drivers/accel/ivpu/ivpu_drv.c b/drivers/accel/ivpu/ivpu_drv.c
>> index 29e78c5ec7c5..6f289e820cd2 100644
>> --- a/drivers/accel/ivpu/ivpu_drv.c
>> +++ b/drivers/accel/ivpu/ivpu_drv.c
>> @@ -17,6 +17,7 @@
>> #include "ivpu_drv.h"
>> #include "ivpu_gem.h"
>> #include "ivpu_hw.h"
>> +#include "ivpu_ipc.h"
>> #include "ivpu_mmu.h"
>> #include "ivpu_mmu_context.h"
>>
>> @@ -230,6 +231,7 @@ int ivpu_shutdown(struct ivpu_device *vdev)
>> int ret;
>>
>> ivpu_hw_irq_disable(vdev);
>> + ivpu_ipc_disable(vdev);
>> ivpu_mmu_disable(vdev);
>>
>> ret = ivpu_hw_power_down(vdev);
>> @@ -346,6 +348,10 @@ static int ivpu_dev_init(struct ivpu_device *vdev)
>> if (!vdev->mmu)
>> return -ENOMEM;
>>
>> + vdev->ipc = drmm_kzalloc(&vdev->drm, sizeof(*vdev->ipc), GFP_KERNEL);
>> + if (!vdev->ipc)
>> + return -ENOMEM;
>> +
>> vdev->hw->ops = &ivpu_hw_mtl_ops;
>> vdev->platform = IVPU_PLATFORM_INVALID;
>> vdev->context_xa_limit.min = IVPU_GLOBAL_CONTEXT_MMU_SSID + 1;
>> @@ -390,6 +396,12 @@ static int ivpu_dev_init(struct ivpu_device *vdev)
>> goto err_mmu_gctx_fini;
>> }
>>
>> + ret = ivpu_ipc_init(vdev);
>> + if (ret) {
>> + ivpu_err(vdev, "Failed to initialize IPC: %d\n", ret);
>> + goto err_mmu_gctx_fini;
>> + }
>> +
>> return 0;
>>
>> err_mmu_gctx_fini:
>> @@ -404,6 +416,7 @@ static int ivpu_dev_init(struct ivpu_device *vdev)
>> static void ivpu_dev_fini(struct ivpu_device *vdev)
>> {
>> ivpu_shutdown(vdev);
>> + ivpu_ipc_fini(vdev);
>> ivpu_mmu_global_context_fini(vdev);
>>
>> drm_WARN_ON(&vdev->drm, !xa_empty(&vdev->context_xa));
>> diff --git a/drivers/accel/ivpu/ivpu_drv.h b/drivers/accel/ivpu/ivpu_drv.h
>> index 69088a03928a..1b9ac8dd8ae7 100644
>> --- a/drivers/accel/ivpu/ivpu_drv.h
>> +++ b/drivers/accel/ivpu/ivpu_drv.h
>> @@ -74,6 +74,7 @@ struct ivpu_wa_table {
>>
>> struct ivpu_hw_info;
>> struct ivpu_mmu_info;
>> +struct ivpu_ipc_info;
>>
>> struct ivpu_device {
>> struct drm_device drm;
>> @@ -85,6 +86,7 @@ struct ivpu_device {
>> struct ivpu_wa_table wa;
>> struct ivpu_hw_info *hw;
>> struct ivpu_mmu_info *mmu;
>> + struct ivpu_ipc_info *ipc;
>>
>> struct ivpu_mmu_context gctx;
>> struct xarray context_xa;
>> diff --git a/drivers/accel/ivpu/ivpu_hw_mtl.c b/drivers/accel/ivpu/ivpu_hw_mtl.c
>> index 39350203452d..fb2b79daabfc 100644
>> --- a/drivers/accel/ivpu/ivpu_hw_mtl.c
>> +++ b/drivers/accel/ivpu/ivpu_hw_mtl.c
>> @@ -7,6 +7,7 @@
>> #include "ivpu_hw_mtl_reg.h"
>> #include "ivpu_hw_reg_io.h"
>> #include "ivpu_hw.h"
>> +#include "ivpu_ipc.h"
>> #include "ivpu_mmu.h"
>>
>> #define TILE_FUSE_ENABLE_BOTH 0x0
>> @@ -934,6 +935,9 @@ static u32 ivpu_hw_mtl_irqv_handler(struct ivpu_device *vdev, int irq)
>> if (REG_TEST_FLD(MTL_VPU_HOST_SS_ICB_STATUS_0, MMU_IRQ_0_INT, status))
>> ivpu_mmu_irq_evtq_handler(vdev);
>>
>> + if (REG_TEST_FLD(MTL_VPU_HOST_SS_ICB_STATUS_0, HOST_IPC_FIFO_INT, status))
>> + ivpu_ipc_irq_handler(vdev);
>> +
>> if (REG_TEST_FLD(MTL_VPU_HOST_SS_ICB_STATUS_0, MMU_IRQ_1_INT, status))
>> ivpu_dbg(vdev, IRQ, "MMU sync complete\n");
>>
>> diff --git a/drivers/accel/ivpu/ivpu_ipc.c b/drivers/accel/ivpu/ivpu_ipc.c
>> new file mode 100644
>> index 000000000000..4bcf3c827235
>> --- /dev/null
>> +++ b/drivers/accel/ivpu/ivpu_ipc.c
>> @@ -0,0 +1,508 @@
>> +// SPDX-License-Identifier: GPL-2.0-only
>> +/*
>> + * Copyright (C) 2020-2022 Intel Corporation
>> + */
>> +
>> +#include <linux/genalloc.h>
>> +#include <linux/highmem.h>
>> +#include <linux/kthread.h>
>> +#include <linux/wait.h>
>> +
>> +#include "ivpu_drv.h"
>> +#include "ivpu_gem.h"
>> +#include "ivpu_hw.h"
>> +#include "ivpu_hw_reg_io.h"
>> +#include "ivpu_ipc.h"
>> +#include "ivpu_jsm_msg.h"
>> +
>> +#define IPC_MAX_RX_MSG 128
>> +#define IS_KTHREAD() (get_current()->flags & PF_KTHREAD)
>> +
>> +struct ivpu_ipc_tx_buf {
>> + struct ivpu_ipc_hdr ipc;
>> + struct vpu_jsm_msg jsm;
>> +};
>> +
>> +struct ivpu_ipc_rx_msg {
>> + struct list_head link;
>> + struct ivpu_ipc_hdr *ipc_hdr;
>> + struct vpu_jsm_msg *jsm_msg;
>> +};
>> +
>> +static void ivpu_ipc_msg_dump(struct ivpu_device *vdev, char *c,
>> + struct ivpu_ipc_hdr *ipc_hdr, u32 vpu_addr)
>> +{
>> + ivpu_dbg(vdev, IPC,
>> + "%s: vpu:0x%x (data_addr:0x%08x, data_size:0x%x, channel:0x%x, src_node:0x%x, dst_node:0x%x, status:0x%x)",
>> + c, vpu_addr, ipc_hdr->data_addr, ipc_hdr->data_size, ipc_hdr->channel,
>> + ipc_hdr->src_node, ipc_hdr->dst_node, ipc_hdr->status);
>> +}
>> +
>> +static void ivpu_jsm_msg_dump(struct ivpu_device *vdev, char *c,
>> + struct vpu_jsm_msg *jsm_msg, u32 vpu_addr)
>> +{
>> + u32 *payload = (u32 *)&jsm_msg->payload;
>> +
>> + ivpu_dbg(vdev, JSM,
>> + "%s: vpu:0x%08x (type:0x%x, status:0x%x, id: 0x%x, result: 0x%x, payload:0x%x 0x%x 0x%x 0x%x 0x%x)\n",
>> + c, vpu_addr, jsm_msg->type, jsm_msg->status, jsm_msg->request_id, jsm_msg->result,
>> + payload[0], payload[1], payload[2], payload[3], payload[4]);
>> +}
>> +
>> +static void
>> +ivpu_ipc_rx_mark_free(struct ivpu_device *vdev, struct ivpu_ipc_hdr *ipc_hdr,
>> + struct vpu_jsm_msg *jsm_msg)
>> +{
>> + ipc_hdr->status = IVPU_IPC_HDR_FREE;
>> + if (jsm_msg)
>> + jsm_msg->status = VPU_JSM_MSG_FREE;
>> + wmb(); /* Flush WC buffers for message statuses */
>> +}
>> +
>> +static void ivpu_ipc_mem_fini(struct ivpu_device *vdev)
>> +{
>> + struct ivpu_ipc_info *ipc = vdev->ipc;
>> +
>> + ivpu_bo_free_internal(ipc->mem_rx);
>> + ivpu_bo_free_internal(ipc->mem_tx);
>> +}
>> +
>> +static int
>> +ivpu_ipc_tx_prepare(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons,
>> + struct vpu_jsm_msg *req)
>> +{
>> + struct ivpu_ipc_info *ipc = vdev->ipc;
>> + struct ivpu_ipc_tx_buf *tx_buf;
>> + u32 tx_buf_vpu_addr;
>> + u32 jsm_vpu_addr;
>> +
>> + tx_buf_vpu_addr = gen_pool_alloc(ipc->mm_tx, sizeof(*tx_buf));
>> + if (!tx_buf_vpu_addr) {
>> + ivpu_err(vdev, "Failed to reserve IPC buffer, size %ld\n",
>> + sizeof(*tx_buf));
>> + return -ENOMEM;
>> + }
>> +
>> + tx_buf = ivpu_to_cpu_addr(ipc->mem_tx, tx_buf_vpu_addr);
>> + if (drm_WARN_ON(&vdev->drm, !tx_buf)) {
>> + gen_pool_free(ipc->mm_tx, tx_buf_vpu_addr, sizeof(*tx_buf));
>> + return -EIO;
>> + }
>> +
>> + jsm_vpu_addr = tx_buf_vpu_addr + offsetof(struct ivpu_ipc_tx_buf, jsm);
>> +
>> + if (tx_buf->ipc.status != IVPU_IPC_HDR_FREE)
>> + ivpu_warn(vdev, "IPC message vpu:0x%x not released by firmware\n",
>> + tx_buf_vpu_addr);
>> +
>> + if (tx_buf->jsm.status != VPU_JSM_MSG_FREE)
>> + ivpu_warn(vdev, "JSM message vpu:0x%x not released by firmware\n",
>> + jsm_vpu_addr);
>> +
>> + memset(tx_buf, 0, sizeof(*tx_buf));
>> + tx_buf->ipc.data_addr = jsm_vpu_addr;
>> + /* TODO: Set data_size to actual JSM message size, not union of all messages */
>> + tx_buf->ipc.data_size = sizeof(*req);
>> + tx_buf->ipc.channel = cons->channel;
>> + tx_buf->ipc.src_node = 0;
>> + tx_buf->ipc.dst_node = 1;
>> + tx_buf->ipc.status = IVPU_IPC_HDR_ALLOCATED;
>> + tx_buf->jsm.type = req->type;
>> + tx_buf->jsm.status = VPU_JSM_MSG_ALLOCATED;
>> + tx_buf->jsm.payload = req->payload;
>> +
>> + req->request_id = atomic_inc_return(&ipc->request_id);
>> + tx_buf->jsm.request_id = req->request_id;
>> + cons->request_id = req->request_id;
>> + wmb(); /* Flush WC buffers for IPC, JSM msgs */
>> +
>> + cons->tx_vpu_addr = tx_buf_vpu_addr;
>> +
>> + ivpu_jsm_msg_dump(vdev, "TX", &tx_buf->jsm, jsm_vpu_addr);
>> + ivpu_ipc_msg_dump(vdev, "TX", &tx_buf->ipc, tx_buf_vpu_addr);
>> +
>> + return 0;
>> +}
>> +
>> +static void ivpu_ipc_tx_release(struct ivpu_device *vdev, u32 vpu_addr)
>> +{
>> + struct ivpu_ipc_info *ipc = vdev->ipc;
>> +
>> + if (vpu_addr)
>> + gen_pool_free(ipc->mm_tx, vpu_addr, sizeof(struct ivpu_ipc_tx_buf));
>> +}
>> +
>> +static void ivpu_ipc_tx(struct ivpu_device *vdev, u32 vpu_addr)
>> +{
>> + ivpu_hw_reg_ipc_tx_set(vdev, vpu_addr);
>> +}
>> +
>> +void
>> +ivpu_ipc_consumer_add(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, u32 channel)
>> +{
>> + struct ivpu_ipc_info *ipc = vdev->ipc;
>> +
>> + INIT_LIST_HEAD(&cons->link);
>> + cons->channel = channel;
>> + cons->tx_vpu_addr = 0;
>> + cons->request_id = 0;
>> + spin_lock_init(&cons->rx_msg_lock);
>> + INIT_LIST_HEAD(&cons->rx_msg_list);
>> + init_waitqueue_head(&cons->rx_msg_wq);
>> +
>> + spin_lock_irq(&ipc->cons_list_lock);
>> + list_add_tail(&cons->link, &ipc->cons_list);
>> + spin_unlock_irq(&ipc->cons_list_lock);
>> +}
>> +
>> +void ivpu_ipc_consumer_del(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons)
>> +{
>> + struct ivpu_ipc_info *ipc = vdev->ipc;
>> + struct ivpu_ipc_rx_msg *rx_msg, *r;
>> +
>> + spin_lock_irq(&ipc->cons_list_lock);
>> + list_del(&cons->link);
>> + spin_unlock_irq(&ipc->cons_list_lock);
>> +
>> + spin_lock_irq(&cons->rx_msg_lock);
>> + list_for_each_entry_safe(rx_msg, r, &cons->rx_msg_list, link) {
>> + list_del(&rx_msg->link);
>> + ivpu_ipc_rx_mark_free(vdev, rx_msg->ipc_hdr, rx_msg->jsm_msg);
>> + atomic_dec(&ipc->rx_msg_count);
>> + kfree(rx_msg);
>> + }
>> + spin_unlock_irq(&cons->rx_msg_lock);
>> +
>> + ivpu_ipc_tx_release(vdev, cons->tx_vpu_addr);
>> +}
>> +
>> +static int
>> +ivpu_ipc_send(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, struct vpu_jsm_msg *req)
>> +{
>> + struct ivpu_ipc_info *ipc = vdev->ipc;
>> + int ret;
>> +
>> + ret = mutex_lock_interruptible(&ipc->lock);
>> + if (ret)
>> + return ret;
>> +
>> + if (!ipc->on) {
>> + ret = -EAGAIN;
>> + goto unlock;
>> + }
>> +
>> + ret = ivpu_ipc_tx_prepare(vdev, cons, req);
>> + if (ret)
>> + goto unlock;
>> +
>> + ivpu_ipc_tx(vdev, cons->tx_vpu_addr);
>> +
>> +unlock:
>> + mutex_unlock(&ipc->lock);
>> + return ret;
>> +}
>> +
>> +int ivpu_ipc_receive(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons,
>> + struct ivpu_ipc_hdr *ipc_buf,
>> + struct vpu_jsm_msg *ipc_payload, unsigned long timeout_ms)
>> +{
>> + struct ivpu_ipc_info *ipc = vdev->ipc;
>> + struct ivpu_ipc_rx_msg *rx_msg;
>> + int wait_ret, ret = 0;
>> +
>> + wait_ret = wait_event_interruptible_timeout(cons->rx_msg_wq,
>> + (IS_KTHREAD() && kthread_should_stop()) ||
>> + !list_empty(&cons->rx_msg_list),
>> + msecs_to_jiffies(timeout_ms));
>> +
>> + if (IS_KTHREAD() && kthread_should_stop())
>> + return -EINTR;
>> +
>> + if (wait_ret == 0)
>> + return -ETIMEDOUT;
>> +
>> + if (wait_ret < 0)
>> + return -ERESTARTSYS;
>> +
>> + spin_lock_irq(&cons->rx_msg_lock);
>> + rx_msg = list_first_entry_or_null(&cons->rx_msg_list, struct ivpu_ipc_rx_msg, link);
>> + if (!rx_msg) {
>> + spin_unlock_irq(&cons->rx_msg_lock);
>> + return -EAGAIN;
>> + }
>> + list_del(&rx_msg->link);
>> + spin_unlock_irq(&cons->rx_msg_lock);
>> +
>> + if (ipc_buf)
>> + memcpy(ipc_buf, rx_msg->ipc_hdr, sizeof(*ipc_buf));
>> + if (rx_msg->jsm_msg) {
>> + u32 size = min_t(int, rx_msg->ipc_hdr->data_size, sizeof(*ipc_payload));
>> +
>> + if (rx_msg->jsm_msg->result != VPU_JSM_STATUS_SUCCESS) {
>> + ivpu_dbg(vdev, IPC, "IPC resp result error: %d\n", rx_msg->jsm_msg->result);
>> + ret = -EBADMSG;
>> + }
>> +
>> + if (ipc_payload)
>> + memcpy(ipc_payload, rx_msg->jsm_msg, size);
>> + }
>> +
>> + ivpu_ipc_rx_mark_free(vdev, rx_msg->ipc_hdr, rx_msg->jsm_msg);
>> + atomic_dec(&ipc->rx_msg_count);
>> + kfree(rx_msg);
>> +
>> + return ret;
>> +}
>> +
>> +static int
>> +ivpu_ipc_send_receive_internal(struct ivpu_device *vdev, struct vpu_jsm_msg *req,
>> + enum vpu_ipc_msg_type expected_resp_type,
>> + struct vpu_jsm_msg *resp, u32 channel,
>> + unsigned long timeout_ms)
>> +{
>> + struct ivpu_ipc_consumer cons;
>> + int ret;
>> +
>> + ivpu_ipc_consumer_add(vdev, &cons, channel);
>> +
>> + ret = ivpu_ipc_send(vdev, &cons, req);
>> + if (ret) {
>> + ivpu_warn(vdev, "IPC send failed: %d\n", ret);
>> + goto consumer_del;
>> + }
>> +
>> + ret = ivpu_ipc_receive(vdev, &cons, NULL, resp, timeout_ms);
>> + if (ret) {
>> + ivpu_warn(vdev, "IPC receive failed: type 0x%x, ret %d\n", req->type, ret);
>> + goto consumer_del;
>> + }
>> +
>> + if (resp->type != expected_resp_type) {
>> + ivpu_warn(vdev, "Invalid JSM response type: 0x%x\n", resp->type);
>> + ret = -EBADE;
>> + }
>> +
>> +consumer_del:
>> + ivpu_ipc_consumer_del(vdev, &cons);
>> + return ret;
>> +}
>> +
>> +int ivpu_ipc_send_receive(struct ivpu_device *vdev, struct vpu_jsm_msg *req,
>> + enum vpu_ipc_msg_type expected_resp_type,
>> + struct vpu_jsm_msg *resp, u32 channel,
>> + unsigned long timeout_ms)
>> +{
>> + struct vpu_jsm_msg hb_req = { .type = VPU_JSM_MSG_QUERY_ENGINE_HB };
>> + struct vpu_jsm_msg hb_resp;
>> + int ret;
>> +
>> + ret = ivpu_rpm_get(vdev);
>> + if (ret < 0)
>> + return ret;
>> +
>> + ret = ivpu_ipc_send_receive_internal(vdev, req, expected_resp_type, resp,
>> + channel, timeout_ms);
>> + if (ret != -ETIMEDOUT)
>> + goto rpm_put;
>> +
>> + ret = ivpu_ipc_send_receive_internal(vdev, &hb_req, VPU_JSM_MSG_QUERY_ENGINE_HB_DONE,
>> + &hb_resp, VPU_IPC_CHAN_ASYNC_CMD, vdev->timeout.jsm);
>> + if (ret == -ETIMEDOUT)
>> + ivpu_hw_diagnose_failure(vdev);
>> +
>> +rpm_put:
>> + ivpu_rpm_put(vdev);
>> + return ret;
>> +}
>> +
>> +static bool
>> +ivpu_ipc_match_consumer(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons,
>> + struct ivpu_ipc_hdr *ipc_hdr, struct vpu_jsm_msg *jsm_msg)
>> +{
>> + if (cons->channel != ipc_hdr->channel)
>> + return false;
>> +
>> + if (!jsm_msg || jsm_msg->request_id == cons->request_id)
>> + return true;
>> +
>> + return false;
>> +}
>> +
>> +static bool
>> +ivpu_ipc_dispatch(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons,
>> + struct ivpu_ipc_hdr *ipc_hdr, struct vpu_jsm_msg *jsm_msg)
>> +{
>> + struct ivpu_ipc_info *ipc = vdev->ipc;
>> + struct ivpu_ipc_rx_msg *rx_msg;
>> + unsigned long flags;
>> +
>> + lockdep_assert_held(&ipc->cons_list_lock);
>> +
>> + if (!ivpu_ipc_match_consumer(vdev, cons, ipc_hdr, jsm_msg))
>> + return false;
>> +
>> + rx_msg = kzalloc(sizeof(*rx_msg), GFP_ATOMIC);
>> + if (!rx_msg) {
>> + ivpu_ipc_rx_mark_free(vdev, ipc_hdr, jsm_msg);
>> + return true;
> Isn't this supposed to be false ?
ivpu_ipc_dispatch() returns true if the consumer was matched and not really if dispatch was successful.
I will move ivpu_ipc_match_consumer() outside this function and ivpu_ipc_dispatch() then will be void.
The code should be more readable then.
>> + }
>> +
>> + atomic_inc(&ipc->rx_msg_count);
>> +
>> + rx_msg->ipc_hdr = ipc_hdr;
>> + rx_msg->jsm_msg = jsm_msg;
>> +
>> + spin_lock_irqsave(&cons->rx_msg_lock, flags);
>> + list_add_tail(&rx_msg->link, &cons->rx_msg_list);
>> + spin_unlock_irqrestore(&cons->rx_msg_lock, flags);
>> +
>> + wake_up(&cons->rx_msg_wq);
>> + return true;
>> +}
>> +
>> +int ivpu_ipc_irq_handler(struct ivpu_device *vdev)
> No one checks the return value, so please change this to void or check
> the return value
The return value is checked in the next patch in ivpu_wait_for_ready() function.
Regards,
Jacek
