1What: /sys/class/remoteproc/.../firmware 2Date: October 2016 3Contact: Matt Redfearn <matt.redfearn@mips.com> 4Description: Remote processor firmware 5 6 Reports the name of the firmware currently loaded to the 7 remote processor. 8 9 To change the running firmware, ensure the remote processor is 10 stopped (using /sys/class/remoteproc/.../state) and write a new filename. 11 12What: /sys/class/remoteproc/.../state 13Date: October 2016 14Contact: Matt Redfearn <matt.redfearn@mips.com> 15Description: Remote processor state 16 17 Reports the state of the remote processor, which will be one of: 18 19 - "offline" 20 - "suspended" 21 - "running" 22 - "crashed" 23 - "invalid" 24 25 "offline" means the remote processor is powered off. 26 27 "suspended" means that the remote processor is suspended and 28 must be woken to receive messages. 29 30 "running" is the normal state of an available remote processor 31 32 "crashed" indicates that a problem/crash has been detected on 33 the remote processor. 34 35 "invalid" is returned if the remote processor is in an 36 unknown state. 37 38 Writing this file controls the state of the remote processor. 39 The following states can be written: 40 41 - "start" 42 - "stop" 43 44 Writing "start" will attempt to start the processor running the 45 firmware indicated by, or written to, 46 /sys/class/remoteproc/.../firmware. The remote processor should 47 transition to "running" state. 48 49 Writing "stop" will attempt to halt the remote processor and 50 return it to the "offline" state. 51 52What: /sys/class/remoteproc/.../name 53Date: August 2019 54KernelVersion: 5.4 55Contact: Suman Anna <s-anna@ti.com> 56Description: Remote processor name 57 58 Reports the name of the remote processor. This can be used by 59 userspace in exactly identifying a remote processor and ease 60 up the usage in modifying the 'firmware' or 'state' files. 61 62What: /sys/class/remoteproc/.../coredump 63Date: July 2020 64Contact: Bjorn Andersson <bjorn.andersson@linaro.org>, Ohad Ben-Cohen <ohad@wizery.com> 65Description: Remote processor coredump configuration 66 67 Reports the coredump configuration of the remote processor, 68 which will be one of: 69 70 "disabled" 71 "enabled" 72 "inline" 73 74 "disabled" means no dump will be collected. 75 76 "enabled" means when the remote processor's coredump is 77 collected it will be copied to a separate buffer and that 78 buffer is exposed to userspace. 79 80 "inline" means when the remote processor's coredump is 81 collected userspace will directly read from the remote 82 processor's device memory. Extra buffer will not be used to 83 copy the dump. Also recovery process will not proceed until 84 all data is read by usersapce. 85 86What: /sys/class/remoteproc/.../recovery 87Date: July 2020 88Contact: Bjorn Andersson <bjorn.andersson@linaro.org>, Ohad Ben-Cohen <ohad@wizery.com> 89Description: Remote processor recovery mechanism 90 91 Reports the recovery mechanism of the remote processor, 92 which will be one of: 93 94 "enabled" 95 "disabled" 96 97 "enabled" means, the remote processor will be automatically 98 recovered whenever it crashes. Moreover, if the remote 99 processor crashes while recovery is disabled, it will 100 be automatically recovered too as soon as recovery is enabled. 101 102 "disabled" means, a remote processor will remain in a crashed 103 state if it crashes. This is useful for debugging purposes; 104 without it, debugging a crash is substantially harder. 105