Loading Documentation/connector/connector.txt +44 −0 Original line number Original line Diff line number Diff line Loading @@ -131,3 +131,47 @@ Netlink itself is not reliable protocol, that means that messages can be lost due to memory pressure or process' receiving queue overflowed, be lost due to memory pressure or process' receiving queue overflowed, so caller is warned must be prepared. That is why struct cn_msg [main so caller is warned must be prepared. That is why struct cn_msg [main connector's message header] contains u32 seq and u32 ack fields. connector's message header] contains u32 seq and u32 ack fields. /*****************************************/ Userspace usage. /*****************************************/ 2.6.14 has a new netlink socket implementation, which by default does not allow to send data to netlink groups other than 1. So, if to use netlink socket (for example using connector) with different group number userspace application must subscribe to that group. It can be achieved by following pseudocode: s = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR); l_local.nl_family = AF_NETLINK; l_local.nl_groups = 12345; l_local.nl_pid = 0; if (bind(s, (struct sockaddr *)&l_local, sizeof(struct sockaddr_nl)) == -1) { perror("bind"); close(s); return -1; } { int on = l_local.nl_groups; setsockopt(s, 270, 1, &on, sizeof(on)); } Where 270 above is SOL_NETLINK, and 1 is a NETLINK_ADD_MEMBERSHIP socket option. To drop multicast subscription one should call above socket option with NETLINK_DROP_MEMBERSHIP parameter which is defined as 0. 2.6.14 netlink code only allows to select a group which is less or equal to the maximum group number, which is used at netlink_kernel_create() time. In case of connector it is CN_NETLINK_USERS + 0xf, so if you want to use group number 12345, you must increment CN_NETLINK_USERS to that number. Additional 0xf numbers are allocated to be used by non-in-kernel users. Due to this limitation, group 0xffffffff does not work now, so one can not use add/remove connector's group notifications, but as far as I know, only cn_test.c test module used it. Some work in netlink area is still being done, so things can be changed in 2.6.15 timeframe, if it will happen, documentation will be updated for that kernel. Documentation/dell_rbu.txt +28 −10 Original line number Original line Diff line number Diff line Loading @@ -35,6 +35,7 @@ The driver load creates the following directories under the /sys file system. /sys/class/firmware/dell_rbu/data /sys/class/firmware/dell_rbu/data /sys/devices/platform/dell_rbu/image_type /sys/devices/platform/dell_rbu/image_type /sys/devices/platform/dell_rbu/data /sys/devices/platform/dell_rbu/data /sys/devices/platform/dell_rbu/packet_size The driver supports two types of update mechanism; monolithic and packetized. The driver supports two types of update mechanism; monolithic and packetized. These update mechanism depends upon the BIOS currently running on the system. These update mechanism depends upon the BIOS currently running on the system. Loading @@ -47,8 +48,26 @@ By default the driver uses monolithic memory for the update type. This can be changed to packets during the driver load time by specifying the load changed to packets during the driver load time by specifying the load parameter image_type=packet. This can also be changed later as below parameter image_type=packet. This can also be changed later as below echo packet > /sys/devices/platform/dell_rbu/image_type echo packet > /sys/devices/platform/dell_rbu/image_type Also echoing either mono ,packet or init in to image_type will free up the memory allocated by the driver. In packet update mode the packet size has to be given before any packets can be downloaded. It is done as below echo XXXX > /sys/devices/platform/dell_rbu/packet_size In the packet update mechanism, the user neesd to create a new file having packets of data arranged back to back. It can be done as follows The user creates packets header, gets the chunk of the BIOS image and placs it next to the packetheader; now, the packetheader + BIOS image chunk added to geather should match the specified packet_size. This makes one packet, the user needs to create more such packets out of the entire BIOS image file and then arrange all these packets back to back in to one single file. This file is then copied to /sys/class/firmware/dell_rbu/data. Once this file gets to the driver, the driver extracts packet_size data from the file and spreads it accross the physical memory in contiguous packet_sized space. This method makes sure that all the packets get to the driver in a single operation. In monolithic update the user simply get the BIOS image (.hdr file) and copies to the data file as is without any change to the BIOS image itself. Do the steps below to download the BIOS image. Do the steps below to download the BIOS image. 1) echo 1 > /sys/class/firmware/dell_rbu/loading 1) echo 1 > /sys/class/firmware/dell_rbu/loading Loading @@ -58,7 +77,10 @@ Do the steps below to download the BIOS image. The /sys/class/firmware/dell_rbu/ entries will remain till the following is The /sys/class/firmware/dell_rbu/ entries will remain till the following is done. done. echo -1 > /sys/class/firmware/dell_rbu/loading. echo -1 > /sys/class/firmware/dell_rbu/loading. Until this step is completed the drivr cannot be unloaded. Until this step is completed the driver cannot be unloaded. Also echoing either mono ,packet or init in to image_type will free up the memory allocated by the driver. If an user by accident executes steps 1 and 3 above without executing step 2; If an user by accident executes steps 1 and 3 above without executing step 2; it will make the /sys/class/firmware/dell_rbu/ entries to disappear. it will make the /sys/class/firmware/dell_rbu/ entries to disappear. The entries can be recreated by doing the following The entries can be recreated by doing the following Loading @@ -66,15 +88,11 @@ echo init > /sys/devices/platform/dell_rbu/image_type NOTE: echoing init in image_type does not change it original value. NOTE: echoing init in image_type does not change it original value. Also the driver provides /sys/devices/platform/dell_rbu/data readonly file to Also the driver provides /sys/devices/platform/dell_rbu/data readonly file to read back the image downloaded. This is useful in case of packet update read back the image downloaded. mechanism where the above steps 1,2,3 will repeated for every packet. By reading the /sys/devices/platform/dell_rbu/data file all packet data downloaded can be verified in a single file. The packets are arranged in this file one after the other in a FIFO order. NOTE: NOTE: This driver requires a patch for firmware_class.c which has the addition This driver requires a patch for firmware_class.c which has the modified of request_firmware_nowait_nohotplug function to wortk request_firmware_nowait function. Also after updating the BIOS image an user mdoe application neeeds to execute Also after updating the BIOS image an user mdoe application neeeds to execute code which message the BIOS update request to the BIOS. So on the next reboot code which message the BIOS update request to the BIOS. So on the next reboot the BIOS knows about the new image downloaded and it updates it self. the BIOS knows about the new image downloaded and it updates it self. Loading Makefile +1 −1 Original line number Original line Diff line number Diff line VERSION = 2 VERSION = 2 PATCHLEVEL = 6 PATCHLEVEL = 6 SUBLEVEL = 14 SUBLEVEL = 14 EXTRAVERSION =-rc3 EXTRAVERSION =-rc4 NAME=Affluent Albatross NAME=Affluent Albatross # *DOCUMENTATION* # *DOCUMENTATION* Loading arch/arm/Makefile +1 −1 Original line number Original line Diff line number Diff line Loading @@ -53,7 +53,7 @@ tune-$(CONFIG_CPU_ARM926T) :=-mtune=arm9tdmi tune-$(CONFIG_CPU_SA110) :=-mtune=strongarm110 tune-$(CONFIG_CPU_SA110) :=-mtune=strongarm110 tune-$(CONFIG_CPU_SA1100) :=-mtune=strongarm1100 tune-$(CONFIG_CPU_SA1100) :=-mtune=strongarm1100 tune-$(CONFIG_CPU_XSCALE) :=$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale tune-$(CONFIG_CPU_XSCALE) :=$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale tune-$(CONFIG_CPU_V6) :=-mtune=strongarm tune-$(CONFIG_CPU_V6) :=$(call cc-option,-mtune=arm1136j-s,-mtune=strongarm) # Need -Uarm for gcc < 3.x # Need -Uarm for gcc < 3.x CFLAGS_ABI :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,) CFLAGS_ABI :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,) Loading arch/arm/kernel/armksyms.c +2 −2 Original line number Original line Diff line number Diff line Loading @@ -45,8 +45,8 @@ extern void fp_enter(void); #define EXPORT_SYMBOL_ALIAS(sym,orig) \ #define EXPORT_SYMBOL_ALIAS(sym,orig) \ EXPORT_CRC_ALIAS(sym) \ EXPORT_CRC_ALIAS(sym) \ const struct kernel_symbol __ksymtab_##sym \ static const struct kernel_symbol __ksymtab_##sym \ __attribute__((section("__ksymtab"))) = \ __attribute_used__ __attribute__((section("__ksymtab"))) = \ { (unsigned long)&orig, #sym }; { (unsigned long)&orig, #sym }; /* /* Loading Loading
Documentation/connector/connector.txt +44 −0 Original line number Original line Diff line number Diff line Loading @@ -131,3 +131,47 @@ Netlink itself is not reliable protocol, that means that messages can be lost due to memory pressure or process' receiving queue overflowed, be lost due to memory pressure or process' receiving queue overflowed, so caller is warned must be prepared. That is why struct cn_msg [main so caller is warned must be prepared. That is why struct cn_msg [main connector's message header] contains u32 seq and u32 ack fields. connector's message header] contains u32 seq and u32 ack fields. /*****************************************/ Userspace usage. /*****************************************/ 2.6.14 has a new netlink socket implementation, which by default does not allow to send data to netlink groups other than 1. So, if to use netlink socket (for example using connector) with different group number userspace application must subscribe to that group. It can be achieved by following pseudocode: s = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR); l_local.nl_family = AF_NETLINK; l_local.nl_groups = 12345; l_local.nl_pid = 0; if (bind(s, (struct sockaddr *)&l_local, sizeof(struct sockaddr_nl)) == -1) { perror("bind"); close(s); return -1; } { int on = l_local.nl_groups; setsockopt(s, 270, 1, &on, sizeof(on)); } Where 270 above is SOL_NETLINK, and 1 is a NETLINK_ADD_MEMBERSHIP socket option. To drop multicast subscription one should call above socket option with NETLINK_DROP_MEMBERSHIP parameter which is defined as 0. 2.6.14 netlink code only allows to select a group which is less or equal to the maximum group number, which is used at netlink_kernel_create() time. In case of connector it is CN_NETLINK_USERS + 0xf, so if you want to use group number 12345, you must increment CN_NETLINK_USERS to that number. Additional 0xf numbers are allocated to be used by non-in-kernel users. Due to this limitation, group 0xffffffff does not work now, so one can not use add/remove connector's group notifications, but as far as I know, only cn_test.c test module used it. Some work in netlink area is still being done, so things can be changed in 2.6.15 timeframe, if it will happen, documentation will be updated for that kernel.
Documentation/dell_rbu.txt +28 −10 Original line number Original line Diff line number Diff line Loading @@ -35,6 +35,7 @@ The driver load creates the following directories under the /sys file system. /sys/class/firmware/dell_rbu/data /sys/class/firmware/dell_rbu/data /sys/devices/platform/dell_rbu/image_type /sys/devices/platform/dell_rbu/image_type /sys/devices/platform/dell_rbu/data /sys/devices/platform/dell_rbu/data /sys/devices/platform/dell_rbu/packet_size The driver supports two types of update mechanism; monolithic and packetized. The driver supports two types of update mechanism; monolithic and packetized. These update mechanism depends upon the BIOS currently running on the system. These update mechanism depends upon the BIOS currently running on the system. Loading @@ -47,8 +48,26 @@ By default the driver uses monolithic memory for the update type. This can be changed to packets during the driver load time by specifying the load changed to packets during the driver load time by specifying the load parameter image_type=packet. This can also be changed later as below parameter image_type=packet. This can also be changed later as below echo packet > /sys/devices/platform/dell_rbu/image_type echo packet > /sys/devices/platform/dell_rbu/image_type Also echoing either mono ,packet or init in to image_type will free up the memory allocated by the driver. In packet update mode the packet size has to be given before any packets can be downloaded. It is done as below echo XXXX > /sys/devices/platform/dell_rbu/packet_size In the packet update mechanism, the user neesd to create a new file having packets of data arranged back to back. It can be done as follows The user creates packets header, gets the chunk of the BIOS image and placs it next to the packetheader; now, the packetheader + BIOS image chunk added to geather should match the specified packet_size. This makes one packet, the user needs to create more such packets out of the entire BIOS image file and then arrange all these packets back to back in to one single file. This file is then copied to /sys/class/firmware/dell_rbu/data. Once this file gets to the driver, the driver extracts packet_size data from the file and spreads it accross the physical memory in contiguous packet_sized space. This method makes sure that all the packets get to the driver in a single operation. In monolithic update the user simply get the BIOS image (.hdr file) and copies to the data file as is without any change to the BIOS image itself. Do the steps below to download the BIOS image. Do the steps below to download the BIOS image. 1) echo 1 > /sys/class/firmware/dell_rbu/loading 1) echo 1 > /sys/class/firmware/dell_rbu/loading Loading @@ -58,7 +77,10 @@ Do the steps below to download the BIOS image. The /sys/class/firmware/dell_rbu/ entries will remain till the following is The /sys/class/firmware/dell_rbu/ entries will remain till the following is done. done. echo -1 > /sys/class/firmware/dell_rbu/loading. echo -1 > /sys/class/firmware/dell_rbu/loading. Until this step is completed the drivr cannot be unloaded. Until this step is completed the driver cannot be unloaded. Also echoing either mono ,packet or init in to image_type will free up the memory allocated by the driver. If an user by accident executes steps 1 and 3 above without executing step 2; If an user by accident executes steps 1 and 3 above without executing step 2; it will make the /sys/class/firmware/dell_rbu/ entries to disappear. it will make the /sys/class/firmware/dell_rbu/ entries to disappear. The entries can be recreated by doing the following The entries can be recreated by doing the following Loading @@ -66,15 +88,11 @@ echo init > /sys/devices/platform/dell_rbu/image_type NOTE: echoing init in image_type does not change it original value. NOTE: echoing init in image_type does not change it original value. Also the driver provides /sys/devices/platform/dell_rbu/data readonly file to Also the driver provides /sys/devices/platform/dell_rbu/data readonly file to read back the image downloaded. This is useful in case of packet update read back the image downloaded. mechanism where the above steps 1,2,3 will repeated for every packet. By reading the /sys/devices/platform/dell_rbu/data file all packet data downloaded can be verified in a single file. The packets are arranged in this file one after the other in a FIFO order. NOTE: NOTE: This driver requires a patch for firmware_class.c which has the addition This driver requires a patch for firmware_class.c which has the modified of request_firmware_nowait_nohotplug function to wortk request_firmware_nowait function. Also after updating the BIOS image an user mdoe application neeeds to execute Also after updating the BIOS image an user mdoe application neeeds to execute code which message the BIOS update request to the BIOS. So on the next reboot code which message the BIOS update request to the BIOS. So on the next reboot the BIOS knows about the new image downloaded and it updates it self. the BIOS knows about the new image downloaded and it updates it self. Loading
Makefile +1 −1 Original line number Original line Diff line number Diff line VERSION = 2 VERSION = 2 PATCHLEVEL = 6 PATCHLEVEL = 6 SUBLEVEL = 14 SUBLEVEL = 14 EXTRAVERSION =-rc3 EXTRAVERSION =-rc4 NAME=Affluent Albatross NAME=Affluent Albatross # *DOCUMENTATION* # *DOCUMENTATION* Loading
arch/arm/Makefile +1 −1 Original line number Original line Diff line number Diff line Loading @@ -53,7 +53,7 @@ tune-$(CONFIG_CPU_ARM926T) :=-mtune=arm9tdmi tune-$(CONFIG_CPU_SA110) :=-mtune=strongarm110 tune-$(CONFIG_CPU_SA110) :=-mtune=strongarm110 tune-$(CONFIG_CPU_SA1100) :=-mtune=strongarm1100 tune-$(CONFIG_CPU_SA1100) :=-mtune=strongarm1100 tune-$(CONFIG_CPU_XSCALE) :=$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale tune-$(CONFIG_CPU_XSCALE) :=$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale tune-$(CONFIG_CPU_V6) :=-mtune=strongarm tune-$(CONFIG_CPU_V6) :=$(call cc-option,-mtune=arm1136j-s,-mtune=strongarm) # Need -Uarm for gcc < 3.x # Need -Uarm for gcc < 3.x CFLAGS_ABI :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,) CFLAGS_ABI :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,) Loading
arch/arm/kernel/armksyms.c +2 −2 Original line number Original line Diff line number Diff line Loading @@ -45,8 +45,8 @@ extern void fp_enter(void); #define EXPORT_SYMBOL_ALIAS(sym,orig) \ #define EXPORT_SYMBOL_ALIAS(sym,orig) \ EXPORT_CRC_ALIAS(sym) \ EXPORT_CRC_ALIAS(sym) \ const struct kernel_symbol __ksymtab_##sym \ static const struct kernel_symbol __ksymtab_##sym \ __attribute__((section("__ksymtab"))) = \ __attribute_used__ __attribute__((section("__ksymtab"))) = \ { (unsigned long)&orig, #sym }; { (unsigned long)&orig, #sym }; /* /* Loading
