drivers/accel/amdxdna/amdxdna_mailbox_helper.c

Source file repositories/reference/linux-study-clean/drivers/accel/amdxdna/amdxdna_mailbox_helper.c

File Facts

System
Linux kernel
Corpus path
drivers/accel/amdxdna/amdxdna_mailbox_helper.c
Extension
.c
Size
1384 bytes
Lines
62
Domain
Driver Families
Bucket
drivers/accel
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2024, Advanced Micro Devices, Inc.
 */

#include <drm/amdxdna_accel.h>
#include <drm/drm_device.h>
#include <drm/drm_print.h>
#include <drm/drm_gem.h>
#include <drm/drm_gem_shmem_helper.h>
#include <drm/gpu_scheduler.h>
#include <linux/completion.h>

#include "amdxdna_gem.h"
#include "amdxdna_mailbox.h"
#include "amdxdna_mailbox_helper.h"
#include "amdxdna_pci_drv.h"

int xdna_msg_cb(void *handle, void __iomem *data, size_t size)
{
	struct xdna_notify *cb_arg = handle;
	int ret;

	if (unlikely(!data))
		goto out;

	if (unlikely(cb_arg->size != size)) {
		cb_arg->error = -EINVAL;
		goto out;
	}

	memcpy_fromio(cb_arg->data, data, cb_arg->size);
	print_hex_dump_debug("resp data: ", DUMP_PREFIX_OFFSET,
			     16, 4, cb_arg->data, cb_arg->size, true);
out:
	ret = cb_arg->error;
	complete(&cb_arg->comp);
	return ret;
}

int xdna_send_msg_wait(struct amdxdna_dev *xdna, struct mailbox_channel *chann,
		       struct xdna_mailbox_msg *msg)
{
	struct xdna_notify *hdl = msg->handle;
	int ret;

	ret = xdna_mailbox_send_msg(chann, msg, TX_TIMEOUT);
	if (ret) {
		XDNA_ERR(xdna, "Send message failed, ret %d", ret);
		return ret;
	}

	ret = wait_for_completion_timeout(&hdl->comp,
					  msecs_to_jiffies(RX_TIMEOUT));
	if (!ret) {
		XDNA_ERR(xdna, "Wait for completion timeout");
		return -ETIME;
	}

	return hdl->error;
}

Annotation

Implementation Notes