DMA_BUF_BEGIN_CPU_AC - Online Linux Manual PageSection : 9
Updated : June 2018
Source : Kernel Hackers Manual 2​.6​.
Note : Device drivers infrastructure

---

NAMEdma_buf_begin_cpu_access − Must be called before accessing a dma_buf from the cpu in the kernel context​. Calls begin_cpu_access to allow exporter−specific preparations​. Coherency is only guaranteed in the specified range for the specified access direction​.

---

SYNOPSISint dma_buf_begin_cpu_access(struct dma_buf * dmabuf, size_t start, size_t len, enum dma_data_direction direction);

---

ARGUMENTSdmabuf [in] buffer to prepare cpu access for​. start [in] start of range for cpu access​. len [in] length of range for cpu access​. direction [in] length of range for cpu access​.

---

DESCRIPTIONCan return negative error values, returns 0 on success​.

---

COPYRIGHT
0

---

Johanes Gumabo

---

Data Size   :   4,585 byte
man-dma_buf_begin_cpu_access.9Build   :   2024-12-29, 07:25   :  
Visitor Screen   :   x
Visitor Counter ( page / site )   :   2 / 260,699
Visitor ID   :     :  
Visitor IP   :   18.118.205.123   :  
Visitor Provider   :   AMAZON-02   :  
Provider Position ( lat x lon )   :   39.962500 x -83.006100   :   x
Provider Accuracy Radius ( km )   :   1000   :  
Provider City   :   Columbus   :  
Provider Province   :   Ohio ,   :   ,
Provider Country   :   United States   :  
Provider Continent   :   North America   :  
Visitor Recorder   :   Version   :  
Visitor Recorder   :   Library   :  
Online Linux Manual Page   :   Version   :   Online Linux Manual Page - Fedora.40 - march=x86-64 - mtune=generic - 24.12.29
Online Linux Manual Page   :   Library   :   lib_c - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Online Linux Manual Page   :   Library   :   lib_m - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Data Base   :   Version   :   Online Linux Manual Page Database - 24.04.13 - march=x86-64 - mtune=generic - fedora-38
Data Base   :   Library   :   lib_c - 23.02.07 - march=x86-64 - mtune=generic - fedora.36

---

Very long time ago, I have the best tutor, Wenzel Svojanovsky . If someone knows the email address of Wenzel Svojanovsky , please send an email to johanes_gumabo@yahoo.co.id .

---

If error, please print screen and send to johanes_gumabo@yahoo.co.id
Under development. Support me via PayPal.

---