src/sys/compat/linuxkpi, branch releng/12.2

MFC r364964: LinuxKPI: Implement ksize() function.

2020-09-06T17:40:35Z

In Linux, ksize() gets the actual amount of memory allocated for a given object. This commit adds malloc_usable_size() to FreeBSD KPI which does the same. It also maps LinuxKPI ksize() to newly created function. ksize() function is used by drm-kmod. Reviewed by: hselasky, kib Differential Revision: https://reviews.freebsd.org/D26215

MFC r363564-r363567, r363575, r363835-r363837, r363842-r363843, r364232

2020-08-24T13:19:16Z

r363564: linuxkpi: Include linux/sizes.h in dma-mapping.h Linux does the same, this avoids ifdef or extra includes in ported drivers. Reviewed by: emaste, hselasky Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D25701 r363565: linuxkpi: Include hardirq.h in preempt.h and lockdep.h in hardirq.h Linux does the same, this avoids ifdef or extra includes in ported drivers. Reviewed by: emaste, hselasky Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D25702 r363566: linuxkpi: Add taint* defines This isn't used for us but allow us to port drivers more easily. Reviewed by: hselasky Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D25703 r363567: Revert r363564 linux/sizes.h doesn't exists in base ... sorry. r363575: Fix r363565 lockdep.h needs sys/lock.h for LOCK_CLASS r363835: linuxkpi: Add linux/sizes.h This file contain some defines for common sizes. Sponsored-by: The FreeBSD Foundation Reviewed by: hselasky, emaste Differential Revision: https://reviews.freebsd.org/D25941 r363836: linuxkpi: Add kref_put_lock Same as kref_put but in addition to calling the rel function it will acquire the lock first. Sponsored by: The FreeBSD Foundation Reviewed by: hselasky, emaste Differential Revision: https://reviews.freebsd.org/D25942 r363837: linuxkpi: Add nested variant of mutex_lock_interruptible We don't do anything with the _nesteds variant so just call mutex_lock_interruptible Sponsoredby: The FreeBSD Foundation Reviewed by: hselasky Differential Revision: https://reviews.freebsd.org/D25944 r363842: linuxkpi: Add clear_bit_unlock This calls clear_bit and adds a memory barrier. Sponsored by: The FreeBSD Foundation Reviewed by: hselasky Differential Revision: https://reviews.freebsd.org/D25943 r363843: linuxkpi: Add time_after32 and time_before32 This compare two 32 bits times Sponsored by: The FreeBSD Foundation Reviewed by: kib, hselasky Differential Revision: https://reviews.freebsd.org/D25700 r364232: linuxkpi: Add a few wait_bit functions The linux function does a lot more than that as multiple waitqueue could be fetch from a static table based on the hash of the argument but since in DRM it's only used in one place just add a single variable. We will probably need to change that in the futur but it's ok with DRM even with current linux. Reviewed by: hselasky Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D26054

MFC r361450, r361452, r361550-r361551

2020-08-24T13:14:38Z

r361450: linuxkpi: Add refcount.h Implement some refcount functions needed by drm. Just use the atomic_t struct and functions from linuxkpi for simplicity. Sponsored-by: The FreeBSD Foundation Reviewed by: hselsasky Differential Revision: https://reviews.freebsd.org/D24985 r361452: linuxkpi: Fix mod_timer and del_timer_sync mod_timer is supposed to return 1 if the modified timer was pending, which is exactly what callout_reset does so return the value after checking that it's a correct one in case the api change. del_timer_sync returns int so add a function and handle that. Reviewed by: hselasky Differential Revision: https://reviews.freebsd.org/D24983 r361550: linuxkpi: Add rcu_swap_protected This macros swap an rcu pointer with a normal pointer. The condition only seems to be used for debug/warning under linux, ignore for now. Sponsored-by: The FreeBSD Foundation Reviewed by: hselasky Differential Revision: https://reviews.freebsd.org/D24954 r361551: linuxkpi: Add kstrtou16 This function convert a char * to a u16. Simply use strtoul and cast to compare for ERANGE Sponsored-by: The FreeBSD Foundation Reviewed by: hselasky Differential Revision: https://reviews.freebsd.org/D24996

MFC r361247, r361343, r361418-r361419, r361422, r361449

2020-08-24T12:59:55Z

r361247: linuxkpi: Add irq_work.h Since handlers are call in a thread context we can simply use a workqueue to emulate those functions. The DRM code was patched to do that already, having it in linuxkpi allows us to not patch the upstream code. Sponsored-by: The FreeBSD Foundation Reviewed by: hselasky Differential Revision: https://reviews.freebsd.org/D24859 r361343: linuxkpi: Add rcu_work functions The rcu_work function helps to queue some work after waiting for a grace period. This is needed by DRM drivers. Sponsored-by: The FreeBSD Foundation Reviewed by: hselasky Differential Revision: https://reviews.freebsd.org/D24942 r361418: libkern: Add arc4random_uniform This variant get a random number up to the limit passed as the argument. This is simply a copy of the libc version. Sponsored-by: The FreeBSD Foundation Reviewed by: cem, hselasky (previous version) Differential Revision: https://reviews.freebsd.org/D24962 r361419: linuxkpi: Add prandom_u32_max This is just a wrapper around arc4random_uniform Needed by DRM v5.3 Sponsored-by: The FreeBSD Foundation Reviewed by: cem, hselasky Differential Revision: https://reviews.freebsd.org/D24961 r361422: bbr: Use arc4random_uniform from libkern. This unbreak LINT build Reported by: jenkins, melifaro r361449: linuxkpi: Add __same_type and __must_be_array macros The same_type macro simply wraps around builtin_types_compatible_p which exist for both GCC and CLANG, which returns 1 if both types are the same. The __must_be_array macros returns 1 if the argument is an array. This is needed for DRM v5.3 Sponsored-by: The FreeBSD Foundation Reviewed by: hselasky Differential Revision: https://reviews.freebsd.org/D24953

MFC r361007, r361138-r361140, r361245-r361246

2020-08-24T10:46:09Z

r361007: linuxkpi: Add EBADRQC to errno.h This is used in the amdgpu driver from Linux 5.2 Sponsored-by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D24807 r361138: linuxkpi: Add atomic_dec_and_mutex_lock This function decrement the counter and if the result is 0 it acquires the mutex and returns 1, if not it simply returns 0. Needed by DRM from Linux v5.3 Sponsored-by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D24847 r361139: linuxkpi: Add __mutex_init Same as mutex_init, the lock_class_key argument seems to be only used for debug in Linux, simply ignore it for now. Needed by DRM in Linux v5.3 Sponsored-by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D24848 r361140: linuxkpi: Add offsetofend macro This calculate the offset of the end of the member in the given struct. Needed by DRM in Linux v5.3 Sponsored-by: The FreeBSD Foudation Differential Revision: https://reviews.freebsd.org/D24849 r361245: linuxkpi: Add __init_waitqueue_head The only difference with init_waitqueue_head is that the name and the lock class key are provided but we don't use those so use init_waitqueue_head directly. Sponsored-by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D24861 r361246: linuxkpi: add pci_dev_present pci_dev_present shows if a set of pci ids are present in the system. It just wraps pci_find_device. Needed by DRMv5.2 Submitted by: Austing Shafer (ashafer@badland.io) Differential Revision: https://reviews.freebsd.org/D24796

MFC r360787, r360851, r360870-r360872

2020-08-24T10:42:04Z

r360787: linuxkpi: Add pci_iomap and pci_iounmap Those function are use to map/unmap io region of a pci device. Different resource can be mapped depending on the bar so use a tailq to store them all. Sponsored-by: The FreeBSD Foundation Reviewed by: emaste, hselasky Differential Revision: https://reviews.freebsd.org/D24696 r360851: linuxkpi: Add bitmap_copy and bitmap_andnot bitmap_copy simply copy the bitmaps, no idea why it exists. bitmap_andnot is similar to bitmap_and but uses !src2. Sponsored-by: The FreeBSD Foundation Reviewed by: hselasky Differential Revision: https://reviews.freebsd.org/D24782 r360870: linuxkpi: Add bitmap_alloc and bitmap_free This is a simple call to kmallock_array/kfree, therefore include linux/slab.h as this is where the kmalloc_array/kfree definition is. Sponsored-by: The FreeBSD Foundation Reviewed by: hselsasky Differential Revision: https://reviews.freebsd.org/D24794 r360871: linuxkpi: Really add bitmap_alloc and bitmap_zalloc This was missing in r360870 Sponsored-by: The FreeBSD Foundation r360872: qnlx: Do not redifines types. r360870 added linux/slab.h into liunx/bitmap.h and this include linux/types.h The qlnx driver is redefining some of those types so remove them and add an explicit linux/types.h include. Pointy hat: manu Reported by: Austin Shafer

MFC r358176-r358177

2020-08-24T10:28:15Z

r358176: linuxkpi: Add list_is_first function This function just test if the element is the first of the list. Reviewed by: hselasky Differential Revision: https://reviews.freebsd.org/D23766 r358177: linuxkpi: Add str_has_prefix This function test if the string str begins with the string pointed at by prefix. Reviewed by: hselasky Differential Revision: https://reviews.freebsd.org/D23767

MFC r364109:

2020-08-19T13:32:55Z

Need to clone the task struct fields related to RCU aswell in the LinuxKPI after r359727. This fixes a minor regression issue. Else the priority tracking won't work properly when both sleepable and non-sleepable RCU is in use on the same thread. Bump the __FreeBSD_version to force recompilation of external kernel modules. PR: 242272 Sponsored by: Mellanox Technologies

MFC r364028:

2020-08-19T12:25:34Z

Implement radix_tree_store() in the LinuxKPI for use with the coming extensible arrays implementation. While at it add some more comments explaining the current radix_tree_insert() function and make sure to clean the root node when the radix tree reaches the maximum height. This can happen if the index passed is too big when the tree is empty. The radix_tree_store() function is basically a copy of the radix_tree_insert() function with some added functionality. The radix_tree_store() function is local to FreeBSD and does not yet exist in Linux. Reviewed by: kib Sponsored by: Mellanox Technologies

MFC r363078:

2020-08-03T09:18:59Z

Implement the bitmap_subset() function in the LinuxKPI. This function checks if the bitmap pointed to by the first argument is a subset of the bitmap pointed to by the second argument. The function returns one on success and zero on failure. Sponsored by: Mellanox Technologies