On Thu, May 28, 2015 at 8:23 AM, Marcel Holtmann <marcel@xxxxxxxxxxxx> wrote: > Hi Champion, > >> We want to share some information between wifi driver and bt driver, what rules do you recommend for the following situation ? >> 1. at system startup, bluetooth driver want to read some information (eg antenna settings) that generated by wifi , shall we use files or /proc/ information? >> 2. when user is using Bluetooth, bt driver may notify wifi driver to perform better, shall we use socket to communication? > > this is the Bluetooth subsystem communicating with the WiFi subsystem (cfg80211) and vice versa, then this is happening inside the kernel. I do not see any need to even try to go via userspace at all. So neither /proc and no sockets for this. I agree. But can we give more specific advice on how to do this inside the kernel? i.e. should they create a new driver under drivers/misc which exposes a shared API via EXPORT_SYMBOL? The other option for Realtek to consider is to do this in hardware/firmware. I already saw that the btcoexist driver knows exactly when the wifi and BT start and finish scanning, so there is clearly already an information-passing mechanism between the two interfaces. I wonder if an updated firmware could extend that to include the new information that you wish to additionally transfer. Daniel -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
