diff options
Diffstat (limited to 'kernel/rpmsg/ethosu_rpmsg_capabilities.c')
| -rw-r--r-- | kernel/rpmsg/ethosu_rpmsg_capabilities.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/kernel/rpmsg/ethosu_rpmsg_capabilities.c b/kernel/rpmsg/ethosu_rpmsg_capabilities.c new file mode 100644 index 0000000..73ce2dc --- /dev/null +++ b/kernel/rpmsg/ethosu_rpmsg_capabilities.c @@ -0,0 +1,164 @@ +/* + * SPDX-FileCopyrightText: Copyright 2022-2024 Arm Limited and/or its affiliates <open-source-office@arm.com> + * SPDX-License-Identifier: GPL-2.0-only + * + * This program is free software and is provided to you under the terms of the + * GNU General Public License version 2 as published by the Free Software + * Foundation, and any use by you of this program is subject to the terms + * of such GNU licence. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, you can access it online at + * http://www.gnu.org/licenses/gpl-2.0.html. + * + */ + +/**************************************************************************** + * Includes + ****************************************************************************/ + +#include <rpmsg/ethosu_rpmsg_capabilities.h> + +#include <common/ethosu_device.h> +#include <rpmsg/ethosu_rpmsg.h> + +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/errno.h> + +/**************************************************************************** + * Defines + ****************************************************************************/ + +#define CAPABILITIES_RESP_TIMEOUT_MS 2000 + +/**************************************************************************** + * Functions + ****************************************************************************/ + +static inline int ethosu_capabilities_send(struct ethosu_capabilities *cap, + struct ethosu_mailbox *mailbox) +{ + return ethosu_mailbox_capabilities_request(mailbox, + &cap->msg); +} + +static void ethosu_capabilities_fail(struct ethosu_mailbox_msg *msg) +{ + struct ethosu_capabilities *cap = + container_of(msg, typeof(*cap), msg); + + if (completion_done(&cap->done)) + return; + + cap->errno = -EFAULT; + complete(&cap->done); +} + +void ethosu_capability_rsp(struct ethosu_mailbox *mailbox, + int msg_id, + struct ethosu_core_msg_capabilities_rsp *rsp) +{ + struct device *dev = mailbox->dev; + struct ethosu_mailbox_msg *msg; + struct ethosu_capabilities *cap; + + msg = ethosu_mailbox_find(mailbox, msg_id, + ETHOSU_CORE_MSG_CAPABILITIES_REQ); + if (IS_ERR(msg)) { + dev_warn(dev, + "Id for capabilities msg not found. Id=0x%0x: %ld\n", + msg_id, PTR_ERR(msg)); + + return; + } + + cap = container_of(msg, typeof(*cap), msg); + + if (completion_done(&cap->done)) + return; + + cap->uapi->hw_id.version_status = rsp->version_status; + cap->uapi->hw_id.version_minor = rsp->version_minor; + cap->uapi->hw_id.version_major = rsp->version_major; + cap->uapi->hw_id.product_major = rsp->product_major; + cap->uapi->hw_id.arch_patch_rev = rsp->arch_patch_rev; + cap->uapi->hw_id.arch_minor_rev = rsp->arch_minor_rev; + cap->uapi->hw_id.arch_major_rev = rsp->arch_major_rev; + cap->uapi->driver_patch_rev = rsp->driver_patch_rev; + cap->uapi->driver_minor_rev = rsp->driver_minor_rev; + cap->uapi->driver_major_rev = rsp->driver_major_rev; + cap->uapi->hw_cfg.macs_per_cc = rsp->macs_per_cc; + cap->uapi->hw_cfg.cmd_stream_version = rsp->cmd_stream_version; + cap->uapi->hw_cfg.custom_dma = rsp->custom_dma; + + cap->errno = 0; + complete(&cap->done); +} + +int ethosu_capabilities_request(struct device *dev, + struct ethosu_mailbox *mailbox, + struct ethosu_uapi_device_capabilities *uapi) +{ + struct ethosu_capabilities *cap; + int ret; + int timeout; + + cap = devm_kzalloc(dev, sizeof(struct ethosu_capabilities), + GFP_KERNEL); + if (!cap) + return -ENOMEM; + + cap->dev = dev; + cap->uapi = uapi; + init_completion(&cap->done); + cap->msg.fail = ethosu_capabilities_fail; + + ret = ethosu_mailbox_register(mailbox, &cap->msg); + if (ret < 0) + goto kfree; + + dev_dbg(dev, "Capabilities create. Id=%d, handle=0x%p\n", + cap->msg.id, cap); + + ret = ethosu_capabilities_send(cap, mailbox); + if (0 != ret) + goto deregister; + + /* Unlock the mutex before going to block on the condition */ + device_unlock(dev); + + /* wait for response to arrive back */ + timeout = wait_for_completion_timeout(&cap->done, + msecs_to_jiffies( + CAPABILITIES_RESP_TIMEOUT_MS)); + + /* take back the mutex before resuming to do anything */ + device_lock(dev); + + if (0 == timeout) { + dev_warn(dev, "Capabilities response timeout"); + ret = -ETIME; + goto deregister; + } + + if (cap->errno) { + ret = cap->errno; + goto deregister; + } + +deregister: + ethosu_mailbox_deregister(mailbox, &cap->msg); + +kfree: + dev_dbg(dev, "Capabilities destroy. Id=%d, handle=0x%p\n", + cap->msg.id, cap); + devm_kfree(dev, cap); + + return ret; +} |