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cc981af204
freebsd-nq/sys/kern
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John Baldwin cc981af204 Add new bus methods for mapping resources. 
Add a pair of bus methods that can be used to "map" resources for direct
CPU access using bus_space(9).  bus_map_resource() creates a mapping and
bus_unmap_resource() releases a previously created mapping.  Mappings are
described by 'struct resource_map' object.  Pointers to these objects can
be passed as the first argument to the bus_space wrapper API used for bus
resources.

Drivers that wish to map all of a resource using default settings
(for example, using uncacheable memory attributes) do not need to change.
However, drivers that wish to use non-default settings can now do so
without jumping through hoops.

First, an RF_UNMAPPED flag is added to request that a resource is not
implicitly mapped with the default settings when it is activated.  This
permits other activation steps (such as enabling I/O or memory decoding
in a device's PCI command register) to be taken without creating a
mapping.  Right now the AGP drivers don't set RF_ACTIVE to avoid using
up a large amount of KVA to map the AGP aperture on 32-bit platforms.
Once RF_UNMAPPED is supported on all platforms that support AGP this
can be changed to using RF_UNMAPPED with RF_ACTIVE instead.

Second, bus_map_resource accepts an optional structure that defines
additional settings for a given mapping.

For example, a driver can now request to map only a subset of a resource
instead of the entire range.  The AGP driver could also use this to only
map the first page of the aperture (IIRC, it calls pmap_mapdev() directly
to map the first page currently).  I will also eventually change the
PCI-PCI bridge driver to request mappings of the subset of the I/O window
resource on its parent side to create mappings for child devices rather
than passing child resources directly up to nexus to be mapped.  This
also permits bridges that do address translation to request suitable
mappings from a resource on the "upper" side of the bus when mapping
resources on the "lower" side of the bus.

Another attribute that can be specified is an alternate memory attribute
for memory-mapped resources.  This can be used to request a
Write-Combining mapping of a PCI BAR in an MI fashion.  (Currently the
drivers that do this call pmap_change_attr() directly for x86 only.)

Note that this commit only adds the MI framework.  Each platform needs
to add support for handling RF_UNMAPPED and thew new
bus_map/unmap_resource methods.  Generally speaking, any drivers that
are calling rman_set_bustag() and rman_set_bushandle() need to be
updated.

Discussed on:	arch
Reviewed by:	cem
Differential Revision:	https://reviews.freebsd.org/D5237
2016-05-20 17:57:47 +00:00
..
bus_if.m Add new bus methods for mapping resources. 2016-05-20 17:57:47 +00:00
capabilities.conf Add futimens and utimensat system calls. 2015-01-23 21:07:08 +00:00
clock_if.m
cpufreq_if.m
device_if.m Import the 'iflib' API library for network drivers. From the author: 2016-05-18 04:35:58 +00:00
genassym.sh genassym.sh: call nm(1) with NMFLAGS. 2015-08-14 22:57:13 +00:00
imgact_aout.c Implement vsyscall hack. Prior to 2.13 glibc uses vsyscall 2016-01-09 20:18:53 +00:00
imgact_binmisc.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
imgact_elf32.c
imgact_elf64.c
imgact_elf.c sys: use our roundup2/rounddown2() macros when param.h is available. 2016-04-21 19:57:40 +00:00
imgact_gzip.c Implement lockless resource limits. 2015-06-10 10:48:12 +00:00
imgact_shell.c Allow multiple image activators to run on the same execution by changing 2014-09-04 21:31:25 +00:00
inflate.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
init_main.c sys: use our roundup2/rounddown2() macros when param.h is available. 2016-04-21 19:57:40 +00:00
init_sysent.c Regen. 2016-03-21 21:38:35 +00:00
kern_acct.c
kern_alq.c Use SI_SUB_LAST instead of SI_SUB_SMP as the "catch-all" subsystem. 2016-03-11 23:18:06 +00:00
kern_clock.c Do not acquire the thread lock in hardclock_cnt() unless needed. 2016-05-18 03:55:54 +00:00
kern_clocksource.c Add an EARLY_AP_STARTUP option to start APs earlier during boot. 2016-05-14 18:22:52 +00:00
kern_condvar.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
kern_conf.c Provide yet another KPI for cdev creation, make_dev_s(9). 2016-01-07 20:08:02 +00:00
kern_cons.c CALLOUT_MPSAFE has lost its meaning since r141428, i.e., for more than ten 2015-05-22 17:05:21 +00:00
kern_context.c
kern_cpu.c Add an EARLY_AP_STARTUP option to start APs earlier during boot. 2016-05-14 18:22:52 +00:00
kern_cpuset.c Add more fine-grained kernel options for NUMA support. 2016-04-09 13:58:04 +00:00
kern_ctf.c Don't specify a resid parameter if we're just going to ignore it. Instead, 2015-02-20 20:49:00 +00:00
kern_descrip.c fd: assert dropped filedesc lock in fdcloseexec 2016-05-08 03:26:12 +00:00
kern_dtrace.c
kern_dump.c kernel: use our nitems() macro when it is available through param.h. 2016-04-19 23:48:27 +00:00
kern_environment.c Create wrappers for uint64_t and int64_t for the tunables. While not 2016-04-15 03:09:55 +00:00
kern_et.c Trivial change / forced-commit to document prior change that slipped in 2015-03-16 19:29:19 +00:00
kern_event.c Provide high precision conversion from ns,us,ms -> sbintime in kevent 2016-03-12 23:02:53 +00:00
kern_exec.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
kern_exit.c Add implementation of robust mutexes, hopefully close enough to the 2016-05-17 09:56:22 +00:00
kern_fail.c fail(9): Only gather/print stacks if STACK is enabled 2016-03-17 01:05:53 +00:00
kern_ffclock.c kernel: use our nitems() macro when it is available through param.h. 2016-04-19 23:48:27 +00:00
kern_fork.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
kern_gzio.c Move zlib.c from net to libkern. 2015-04-22 14:38:58 +00:00
kern_hhook.c Check that hhk_helper pointer isn't NULL before access. 2015-11-25 07:14:58 +00:00
kern_idle.c
kern_intr.c The part of r285680 which removed release semantic for two stores to 2015-07-21 14:39:34 +00:00
kern_jail.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
kern_khelp.c
kern_kthread.c kern: for pointers replace 0 with NULL. 2016-04-15 16:10:11 +00:00
kern_ktr.c Fix the logic in the ddb command 'show ktr /a'. Prior to r118269 it would 2016-01-31 17:32:20 +00:00
kern_ktrace.c kernel: use our nitems() macro when it is available through param.h. 2016-04-19 23:48:27 +00:00
kern_linker.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
kern_lock.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
kern_lockf.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
kern_lockstat.c Consistently use a reader/writer flag for lockstat probes in rwlock(9) and 2015-07-19 22:24:33 +00:00
kern_loginclass.c Speed up rctl operation with large rulesets, by holding the lock 2015-11-15 12:10:51 +00:00
kern_malloc.c Move IPv6 malloc tag definitions into the IPv6 code. 2016-05-20 04:45:08 +00:00
kern_mbuf.c Import the 'iflib' API library for network drivers. From the author: 2016-05-18 04:35:58 +00:00
kern_mib.c Fix build after r295934. 2016-02-23 23:37:10 +00:00
kern_module.c Provide better debug message on kernel module name clash. 2015-10-10 09:21:55 +00:00
kern_mtxpool.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
kern_mutex.c Remove the MUTEX_DEBUG kernel option. 2016-05-18 03:34:02 +00:00
kern_ntptime.c Use the monotonic (uptime) counter rather than time-of-day to measure elapsed 2015-07-12 18:38:17 +00:00
kern_numa.c Add an initial NUMA affinity/policy configuration for threads and processes. 2015-07-11 15:21:37 +00:00
kern_osd.c osd(9): Change array pointer to array pointer type from void* 2016-04-26 19:57:35 +00:00
kern_physio.c Add four new RCTL resources - readbps, readiops, writebps and writeiops, 2016-04-07 04:23:25 +00:00
kern_pmc.c
kern_poll.c When a kernel has DEVICE_POLLING turned on but no drivers have 2015-04-14 14:22:34 +00:00
kern_priv.c
kern_proc.c Use a loop instead of a goto in sysctl_kern_proc_kstack(). 2016-04-17 23:22:32 +00:00
kern_procctl.c If process becomes reaper (procctl(PROC_REAP_ACQUIRE)) while already 2015-08-20 22:44:26 +00:00
kern_prot.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
kern_racct.c Get rid of rctl_lock; use racct_lock where appropriate. The fast paths 2016-04-21 16:22:52 +00:00
kern_rangelock.c
kern_rctl.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
kern_resource.c Implement process-shared locks support for libthr.so.3, without 2016-02-28 17:52:33 +00:00
kern_rmlock.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
kern_rwlock.c Don't modify curthread->td_locks unless INVARIANTS is enabled. 2015-08-02 00:03:08 +00:00
kern_sdt.c
kern_sema.c
kern_sendfile.c The sendfile(2) allows to send extra data from userspace before the file 2016-03-29 19:57:11 +00:00
kern_sharedpage.c Split kerne timekeep ABI structure vdso_sv_tk out of the struct 2015-11-23 07:09:35 +00:00
kern_shutdown.c Add 4Kn kernel dump support 2016-04-15 17:45:12 +00:00
kern_sig.c Add ptrace(2) reporting for LWP events. 2015-12-29 23:25:26 +00:00
kern_switch.c Revert for r277213: 2015-01-22 11:12:42 +00:00
kern_sx.c Don't modify curthread->td_locks unless INVARIANTS is enabled. 2015-08-02 00:03:08 +00:00
kern_synch.c sys: extend use of the howmany() macro when available. 2016-04-26 15:38:17 +00:00
kern_syscalls.c Implement lockless resource limits. 2015-06-10 10:48:12 +00:00
kern_sysctl.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
kern_tc.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
kern_thr.c Add implementation of robust mutexes, hopefully close enough to the 2016-05-17 09:56:22 +00:00
kern_thread.c Add implementation of robust mutexes, hopefully close enough to the 2016-05-17 09:56:22 +00:00
kern_time.c sys: extend use of the howmany() macro when available. 2016-04-26 15:38:17 +00:00
kern_timeout.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
kern_umtx.c Add implementation of robust mutexes, hopefully close enough to the 2016-05-17 09:56:22 +00:00
kern_uuid.c
kern_xxx.c
ksched.c Use P1B_PRIO_MAX to designate max posix priority for the RR/FIFO 2015-08-30 18:02:57 +00:00
link_elf_obj.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
link_elf.c kern: for pointers replace 0 with NULL. 2016-04-15 16:10:11 +00:00
linker_if.m sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
Make.tags.inc Bring the tags and links entries for amd64 up to date. 2015-10-27 22:59:24 +00:00
Makefile
makesyscalls.sh Do not include system call wrappers in libc for old FreeBSD system calls. 2016-03-12 22:53:46 +00:00
md4c.c
md5c.c
msi_if.m Introduce MSI and MSI-X support to intrng. This adds a new msi device 2016-05-16 09:11:40 +00:00
p1003_1b.c In preparation for switching linuxulator to the use the native 1:1 2015-05-24 14:44:06 +00:00
pic_if.m Remove FDT specific parts from INTRNG. Change its interface to make it 2016-04-04 09:15:25 +00:00
posix4_mib.c posix4_mib: Don't overrun facility_initialized array 2016-04-27 00:10:32 +00:00
sched_4bsd.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
sched_ule.c The struct thread td_estcpu member is only used by the 4BSD scheduler. 2016-04-17 11:04:27 +00:00
serdev_if.m
stack_protector.c Use nitems() macro instead of __arraycount() 2015-06-16 20:19:00 +00:00
subr_acl_nfs4.c Expose an interface to determine if an ACE is inherited. 2015-09-04 00:14:20 +00:00
subr_acl_posix1e.c
subr_autoconf.c
subr_blist.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
subr_bufring.c
subr_bus_dma.c Fix a bug introduced in r291716: 2016-01-11 20:38:39 +00:00
subr_bus.c Add new bus methods for mapping resources. 2016-05-20 17:57:47 +00:00
subr_busdma_bufalloc.c Fix printf format to allow for bus_size_t not being u_long on all platforms. 2015-10-20 03:25:17 +00:00
subr_capability.c capsicum: plug spurious memset in __cap_rights_init 2015-12-01 02:48:42 +00:00
subr_clock.c For architectures where time_t is wide enough, in particular, 64bit 2014-12-12 09:37:18 +00:00
subr_counter.c Free the temporary buffer in sysctl_handle_counter_u64_array(). 2016-03-15 00:21:32 +00:00
subr_devmap.c Add support for RISC-V. 2016-04-26 12:29:47 +00:00
subr_devstat.c Add support for managing Shingled Magnetic Recording (SMR) drives. 2016-05-19 14:08:36 +00:00
subr_disk.c
subr_dummy_vdso_tc.c Update the vdso timehands only via tc_windup(). 2015-01-20 03:54:30 +00:00
subr_eventhandler.c
subr_fattime.c Where appropriate, use the modern terms for the one true time base 2014-12-21 05:07:11 +00:00
subr_firmware.c Create a dedicated function for ensuring that cdir and rdir are populated. 2015-07-11 16:22:48 +00:00
subr_hash.c kern: Factor out function to convert hash flags to malloc(9) flags 2016-05-04 03:07:52 +00:00
subr_hints.c Add a new device control utility for new-bus devices called devctl. This 2015-02-06 16:09:01 +00:00
subr_intr.c Return the struct intr_pic pointer from intr_pic_register. This will be 2016-05-18 15:05:44 +00:00
subr_kdb.c Fix multiple incorrect SYSCTL arguments in the kernel: 2014-10-21 07:31:21 +00:00
subr_kobj.c
subr_lock.c Add _NEW flag to mtx(9), sx(9), rmlock(9) and rwlock(9). 2014-12-13 21:00:10 +00:00
subr_log.c
subr_mbpool.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
subr_mchain.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
subr_module.c preload_search_info: make sure mod is set 2015-08-21 15:57:57 +00:00
subr_msgbuf.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
subr_param.c Ensure that maxproc does not exceed pid_max, at the time of boot. 2015-09-21 15:02:59 +00:00
subr_pcpu.c
subr_pctrie.c sys: extend use of the howmany() macro when available. 2016-04-26 15:38:17 +00:00
subr_power.c
subr_prf.c Add vlog(9). 2015-11-19 05:50:22 +00:00
subr_prof.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
subr_rman.c Add new bus methods for mapping resources. 2016-05-20 17:57:47 +00:00
subr_rtc.c rtc: fix inverted resolution check 2016-05-04 13:48:59 +00:00
subr_sbuf.c Fail the sbuf if vsnprintf(3) fails. 2015-10-02 09:23:14 +00:00
subr_scanf.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
subr_sfbuf.c Move KASSERT into locked region. 2014-08-11 15:06:07 +00:00
subr_sglist.c Fix a couple of panics when detaching from a cxgbe/cxl interface that was 2015-01-26 16:26:28 +00:00
subr_sleepqueue.c Micro-optimize sleepq_broadcast(). 2016-05-18 03:50:21 +00:00
subr_smp.c topo_set_pu_id: turn a check into an assertion 2016-04-08 11:59:11 +00:00
subr_stack.c Add support for a configurable output channel to witness(4). 2015-11-19 05:56:59 +00:00
subr_syscall.c Support an arbitrary number of arguments to DTrace syscall probes. 2015-12-17 00:00:27 +00:00
subr_taskqueue.c Adjust the creation of tq_name so it can be freed correctly 2016-05-19 17:14:24 +00:00
subr_terminal.c vt(4): Adjust the cursor position after changing the window size 2014-11-01 17:05:15 +00:00
subr_trap.c Add four new RCTL resources - readbps, readiops, writebps and writeiops, 2016-04-07 04:23:25 +00:00
subr_turnstile.c Finish r173600. There is no need to test a condition if both cases 2016-02-10 21:16:37 +00:00
subr_uio.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
subr_unit.c Add explicit cast to fix mips and powerpc build after r299090 2016-05-05 15:21:33 +00:00
subr_vmem.c subr_vmem: Fix double-free in error case of vmem_create 2016-05-11 23:16:11 +00:00
subr_witness.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
sys_capability.c Introduce kern_cap_rights_limit(). 2015-08-11 08:43:50 +00:00
sys_generic.c Cap IOSIZE_MAX to INT_MAX for 32-bit processes. 2016-04-01 18:29:38 +00:00
sys_pipe.c sys: extend use of the howmany() macro when available. 2016-04-26 15:38:17 +00:00
sys_procdesc.c The si_status field of the siginfo_t, provided by the waitid(2) and 2015-07-18 09:02:50 +00:00
sys_process.c Add ptrace(2) reporting for LWP events. 2015-12-29 23:25:26 +00:00
sys_socket.c Expose soaio_enqueue(). 2016-04-29 20:12:45 +00:00
syscalls.c Regen. 2016-03-21 21:38:35 +00:00
syscalls.master Fully handle size_t lengths in AIO requests. 2016-03-21 21:37:33 +00:00
systrace_args.c Regen. 2016-03-21 21:38:35 +00:00
sysv_ipc.c
sysv_msg.c osd(9): Change array pointer to array pointer type from void* 2016-04-26 19:57:35 +00:00
sysv_sem.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
sysv_shm.c osd(9): Change array pointer to array pointer type from void* 2016-04-26 19:57:35 +00:00
tty_compat.c
tty_info.c
tty_inq.c
tty_outq.c
tty_pts.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
tty_tty.c tty: replace several curthread->td_proc with stored curproc 2015-07-06 18:53:56 +00:00
tty_ttydisc.c Don't clear the software flow control flag before draining for last 2016-01-26 14:46:39 +00:00
tty.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
uipc_accf.c
uipc_debug.c Refactor the AIO subsystem to permit file-type-specific handling and 2016-03-01 18:12:14 +00:00
uipc_domain.c Introduce a new protocol hook pru_aio_queue. 2016-04-29 20:11:09 +00:00
uipc_mbuf2.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
uipc_mbuf.c kern: for pointers replace 0 with NULL. 2016-04-15 16:10:11 +00:00
uipc_mbufhash.c Reduce header pollution. 2015-03-17 14:16:50 +00:00
uipc_mqueue.c Use the new PR_METHOD_REMOVE to clean up jail handling in POSIX 2016-04-25 04:36:54 +00:00
uipc_sem.c Clean up some style(9) violations. 2016-04-14 17:07:26 +00:00
uipc_shm.c sys: extend use of the howmany() macro when available. 2016-04-26 15:38:17 +00:00
uipc_sockbuf.c kern: for pointers replace 0 with NULL. 2016-04-15 16:10:11 +00:00
uipc_socket.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
uipc_syscalls.c The SA-16:19 wouldn't have happened if the sockargs() had properly typed 2016-05-18 22:05:50 +00:00
uipc_usrreq.c kernel: use our nitems() macro when it is available through param.h. 2016-04-19 23:48:27 +00:00
vfs_acl.c Replace struct filedesc argument in getvnode with struct thread 2015-06-16 13:09:18 +00:00
vfs_aio.c Tidy up the unmapped I/O code in qphysio. 2016-03-31 17:27:30 +00:00
vfs_bio.c sys/kern: spelling fixes. 2016-04-29 21:54:28 +00:00
vfs_cache.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
vfs_cluster.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
vfs_default.c Simplify AIO initialization now that it is standard. 2016-03-09 19:05:11 +00:00
vfs_export.c kern: for pointers replace 0 with NULL. 2016-04-15 16:10:11 +00:00
vfs_extattr.c Replace struct filedesc argument in getvnode with struct thread 2015-06-16 13:09:18 +00:00
vfs_hash.c Add vfs_hash_ref(9) function, which finds a vnode by the hash value 2016-05-11 06:32:22 +00:00
vfs_init.c sysctl: switch sysctllock to a sleepable rmlock, take 2 2015-09-15 23:06:56 +00:00
vfs_lookup.c sys/kern: spelling fixes in comments. 2016-04-29 22:15:33 +00:00
vfs_mount.c dounmount: do not call mountcheckdirs() for mounts with MNT_IGNORE 2016-05-16 07:23:24 +00:00
vfs_mountroot.c Stop hiding errors that result in failure to mount /dev. Otherwise, 2016-05-12 07:38:10 +00:00
vfs_subr.c vfs_read_dirent: increment ncookies after adding a cookie 2016-05-16 07:31:11 +00:00
vfs_syscalls.c Simplify AIO initialization now that it is standard. 2016-03-09 19:05:11 +00:00
vfs_vnops.c Ensure that ftruncate(2) is performed synchronously when file is 2016-05-18 12:03:57 +00:00
vnode_if.src Add EVFILT_VNODE open, read and close notifications. 2016-05-03 15:17:43 +00:00