linux/drivers/fsi, branch v5.0

fsi: Add On-Chip Controller (OCC) driver

2018-12-03T00:25:28Z

The OCC is a device embedded on a POWER processor that collects and aggregates sensor data from the processor and system. The OCC can provide the raw sensor data as well as perform thermal and power management on the system. This driver provides an atomic communications channel between a service processor (e.g. a BMC) and the OCC. The driver is dependent on the FSI SBEFIFO driver to get hardware access through the SBE to the OCC SRAM. Commands are issued to the SBE to send or fetch data to the SRAM. Signed-off-by: Eddie James Signed-off-by: Andrew Jeffery Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Joel Stanley Signed-off-by: Guenter Roeck

fsi: fsi-scom.c: Remove duplicate header

2018-11-25T23:13:04Z

Remove linux/cdev.h which is included more than once Signed-off-by: Brajeswar Ghosh Signed-off-by: Benjamin Herrenschmidt

fsi: master-ast-cf: select GENERIC_ALLOCATOR

2018-11-25T23:11:43Z

In randconfig builds without CONFIG_GENERIC_ALLOCATOR, this driver fails to link: ERROR: "gen_pool_alloc_algo" [drivers/fsi/fsi-master-ast-cf.ko] undefined! ERROR: "gen_pool_fixed_alloc" [drivers/fsi/fsi-master-ast-cf.ko] undefined! ERROR: "of_gen_pool_get" [drivers/fsi/fsi-master-ast-cf.ko] undefined! ERROR: "gen_pool_free" [drivers/fsi/fsi-master-ast-cf.ko] undefined! Select the dependency as all other users do. Fixes: 6a794a27daca ("fsi: master-ast-cf: Add new FSI master using Aspeed ColdFire") Signed-off-by: Arnd Bergmann Signed-off-by: Benjamin Herrenschmidt

iov_iter: Separate type from direction and use accessor functions

2018-10-23T23:41:07Z

In the iov_iter struct, separate the iterator type from the iterator direction and use accessor functions to access them in most places. Convert a bunch of places to use switch-statements to access them rather then chains of bitwise-AND statements. This makes it easier to add further iterator types. Also, this can be more efficient as to implement a switch of small contiguous integers, the compiler can use ~50% fewer compare instructions than it has to use bitwise-and instructions. Further, cease passing the iterator type into the iterator setup function. The iterator function can set that itself. Only the direction is required. Signed-off-by: David Howells

fsi: sbefifo: Bump max command length

2018-08-08T05:44:47Z

Otherwise cronus putmem fails istep and BML fails to upload skiboot To do that, we still use our one-page command buffer for small commands for speed, and for anything bigger, with a limit of 1MB plus a page, we vmalloc a temporary buffer. The limit was chosen because Cronus will break up any data transfer into 1M chunks (the extra page is for the command header). Signed-off-by: Benjamin Herrenschmidt Reviewed-by: Andrew Jeffery

fsi: scom: Fix NULL dereference

2018-08-06T02:27:04Z

The chardev conversion forgot to copy the fsi_dev, silly mistake, compounded by a testing mistake on my side, this specific driver wasn't being tested properly. Fixes: d8f4587655f9 "fsi: scom: Convert to use the new chardev" Signed-off-by: Benjamin Herrenschmidt

fsi: Prevent multiple concurrent rescans

2018-07-26T23:58:12Z

The bus scanning process isn't terribly good at parallel attempts at rescanning the same bus. Let's have a per-master mutex protecting the scanning process. Signed-off-by: Benjamin Herrenschmidt

fsi: Add cfam char devices

2018-07-26T23:58:05Z

This aims to deprecate the "raw" sysfs file used for directly accessing the CFAM and instead use a char device like the other sub drivers. Since it reworks the slave creation code and adds a cfam device type, we also use the opportunity to convert the attributes to attribute groups and add a couple more. Signed-off-by: Benjamin Herrenschmidt

fsi: scom: Convert to use the new chardev

2018-07-26T23:57:55Z

This converts FSI scom to use the new fsi-core controlled chardev allocator and use a real cdev instead of a miscdev. Signed-off-by: Benjamin Herrenschmidt

fsi: sbefifo: Convert to use the new chardev

2018-07-26T23:57:31Z

This converts FSI sbefifo to use the new fsi-core controlled chardev allocator and use a real cdev instead of a miscdev. One side effect is to fix the object lifetime by removing the use of devm_kzalloc() for something that contains kobjects, and using proper reference counting. Signed-off-by: Benjamin Herrenschmidt