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EDGEML-8777 - [Linux NPU Driver]: support firmware log buffer
[Why] Log buffer support is required to enhance debugging support on NPU stack [How] 1. allocate log buffer and share with firmware via 'start event trace' message Config start_event_trace request param, send via mgmt channel. Handle the send buffer resp. 2. receive notifications about log buffer fullness, via interrupt from firmware. Handle channel interrupt process further buffer data and prepare new buffer. Signed-off-by: Vinit1085 <[email protected]>
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Original file line number | Diff line number | Diff line change |
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// SPDX-License-Identifier: GPL-2.0 | ||
/* | ||
* Copyright (C) 2025, Advanced Micro Devices, Inc. | ||
*/ | ||
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#include <linux/kthread.h> | ||
#include <linux/kernel.h> | ||
#include <linux/dma-mapping.h> | ||
#include <drm/drm_cache.h> | ||
#include "aie2_msg_priv.h" | ||
#include "aie2_pci.h" | ||
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struct event_trace_req_buf { | ||
struct amdxdna_dev_hdl *ndev; | ||
struct start_event_trace_req trace_req; | ||
u8 *buf; | ||
}; | ||
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int aie2_start_event_trace_send(struct amdxdna_dev_hdl *ndev) | ||
{ | ||
struct amdxdna_dev *xdna = ndev->xdna; | ||
struct event_trace_req_buf *trace_req_buf; | ||
int ret; | ||
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trace_req_buf = ndev->event_trace_req; | ||
printk(KERN_ERR "vs- aie2_start_event_trace_send\n"); | ||
drm_WARN_ON(&xdna->ddev, !mutex_is_locked(&xdna->dev_lock)); | ||
/* Send only two log buffers first , 1. for logging 2. ping-pong*/ | ||
drm_clflush_virt_range(trace_req_buf->buf, trace_req_buf->trace_req.dram_buffer_size); /* device can access */ | ||
ret = aie2_start_event_trace_msg(ndev, trace_req_buf->trace_req.dram_buffer_address, | ||
trace_req_buf->trace_req.dram_buffer_size, &trace_req_buf->trace_req); | ||
return ret; | ||
} | ||
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void aie2_event_trace_free(struct amdxdna_dev_hdl *ndev) | ||
{ | ||
struct amdxdna_dev *xdna = ndev->xdna; | ||
struct event_trace_req_buf *req_buf; | ||
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req_buf = ndev->event_trace_req; | ||
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printk(KERN_ERR "vs- aie2_event_trace_free\n"); | ||
dma_free_noncoherent(xdna->ddev.dev, req_buf->trace_req.dram_buffer_size, req_buf->buf, | ||
(dma_addr_t)req_buf->trace_req.dram_buffer_address, DMA_BIDIRECTIONAL); | ||
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kfree(req_buf); | ||
} | ||
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int aie2_event_trace_alloc(struct amdxdna_dev_hdl *ndev) | ||
{ | ||
int ret; | ||
struct amdxdna_dev *xdna = ndev->xdna; | ||
struct event_trace_req_buf *req_buf; | ||
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printk(KERN_ERR "vs- aie2_event_trace_alloc\n"); | ||
req_buf = kzalloc(sizeof(struct event_trace_req_buf), GFP_KERNEL); | ||
if (!req_buf) | ||
return -ENOMEM; | ||
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req_buf->buf = dma_alloc_noncoherent(xdna->ddev.dev, TRACE_EVENT_BUFFER_SIZE, | ||
(dma_addr_t*)&req_buf->trace_req.dram_buffer_address, DMA_BIDIRECTIONAL, GFP_KERNEL); | ||
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if (!req_buf->buf) { | ||
ret = -ENOMEM; | ||
goto free_event_trace_req_buf; | ||
} | ||
req_buf->trace_req.dram_buffer_size = TRACE_EVENT_BUFFER_SIZE; | ||
ndev->event_trace_req = req_buf; | ||
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XDNA_INFO(xdna, "vs- trace event buf size %d, dram_buffer_address 0x%llx", | ||
req_buf->trace_req.dram_buffer_size, req_buf->trace_req.dram_buffer_address); | ||
return 0; | ||
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free_event_trace_req_buf: | ||
kfree(req_buf); | ||
return ret; | ||
} |
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