34 Commits

Author SHA1 Message Date
jhibbits
2dbcd6c69b powerpc/powernv: Make opal_i2c driver work with attached i2c drivers
* FreeBSD stores addresses in 8 bit format, but the OPAL API requires the 7-bit
  address, and encodes the direction elsewhere.  Behave like other i2c drivers,
  and shift accordingly.
* The OPAL API can already handle multiple requests in flight.  Change the async
  token to be private to the thread, so as not to stomp across i2c accesses,
  remove the limitation error message, and use the correct message index to
  transfer all messages in the list.
* Micro-optimize the async handler to not continuously call pmap_kextract() when
  spin-waiting for the operation to complete.

This has been tested by hexdumping an EEPROM attached via the icee(4) driver.
2018-07-09 20:33:48 +00:00
jhibbits
a95da9e8d3 Let ofw_iicbus work its magic on OPAL i2c buses.
ofw_iicbus already has attachments on iichb.  Rather than adding an explicit
attachment onto opal_i2c, simply change the exposed name of the OPAL i2c bus
to 'iichb'.
2018-07-07 01:58:40 +00:00
jhibbits
07228c83c8 Support multiple OPAL consoles, and don't crash if uart is not stdout
Summary: If the chosen console is not the OPAL uart, but OPAL uart devices
exist, the console device doesn't attach properly, and faults in the interrupt
handler, with a NULL pointer dereference.  To fix this, and as a byproduct, also
support multiple OPAL consoles, refactor to have the console getc callback use
the appropriate softc instead of the global console_sc, which may be NULL in the
case of a different device being the console.

Reviewed by:	nwhitehorn
Differential Revision: https://reviews.freebsd.org/D16071
2018-06-29 19:35:25 +00:00
leitao
3c94b6db0e powerpc64/powernv: Avoid type promotion
There is a type promotion that transform count = -1 into a unsigned int causing
the default TCE SEG SIZE not being returned on a Boston POWER9 machine.

This machine does not have the 'ibm,supported-tce-sizes' entries, thus, count
is set to -1, and the function continue to execute instead of returning.

Reviewed by: jhibbits, wma
Approved by: jhibbits (mentor)
Differential Revision: https://reviews.freebsd.org/D15763
2018-06-12 19:50:33 +00:00
jhibbits
595b3a9fc7 Remove a debug printf from opal_pci driver 2018-05-31 04:11:40 +00:00
jhibbits
6dcf88b73b Make opal_pci driver work with POWER9
Summary:
Coupled with r334365, this makes PCI work on POWER9.  There is still more to
do to fully exploit the hardware capabilities, but this is sufficient to
enable USB and ethernet controllers on a POWER9 Talos II system.

Reviewed by:	nwhitehorn, leitao
Differential Revision: https://reviews.freebsd.org/D15566
2018-05-30 03:00:57 +00:00
jhibbits
018b267a7c Cache the phandle of the PCI node in opal_pci_attach
Simple cleanup, no functional change.  This is related to the fixups needed
for POWER9 support.
2018-05-30 02:47:23 +00:00
jhibbits
b12054557d Make ALT_BREAK_TO_DEBUGGER work with OPAL console
Match other consoles by using the higher level cngetc() in the interrupt
handler, so that kdb_alt_break() can check for console break.
2018-05-28 01:59:48 +00:00
jhibbits
7068814771 Fix a typo missed in r334232 2018-05-26 04:24:25 +00:00
jhibbits
96a9723c2a Correct a typo for opal temperature sensor type constant 2018-05-26 02:45:41 +00:00
jhibbits
0712c8c20c Add an IPMI attachment for PowerNV systems
IPMI access on PowerNV systems is done through the OPAL firmware.  This adds a
simple attachment for communicating with the FSP/BMC on these machines.  This
has been tested on a Talos POWER9 workstation, only in the bootup phase, noting
the successful attachment messages:

...
ipmi0: IPMI device rev. 0, firmware rev. 2.00, version 2.0, device support mask 0
ipmi0: Number of channels 2
...

The ipmi device has not been added to GENERIC64, but may be after further
testing.  It may also eventually be added to the ipmi module at that point.
2018-05-22 03:57:32 +00:00
jhibbits
ae82fd52ad Basic OPAL sensor support for POWER9 platforms
Summary:
PowerNV architectures (in the test case POWER9) export sensors via the device
tree, which are accessed via OPAL calls.  This adds sysctl nodes for each
device in a generic fashion.  New sysctl nodes are:

dev.opal_sensor.N.sensor
dev.opal_sensor.N.sensor_min
dev.opal_sensor.N.sensor_max
dev.opal_sensor.N.type
dev.opal_sensor.N.label

These are rooted at a parent attachment under opal, called opalsens.  This does
not add support for the "sensor groups" defined in the device tree.

Reviewed by:	breno.leitao_gmail.com
Differential Revision: https://reviews.freebsd.org/D15362
2018-05-22 02:42:53 +00:00
jhibbits
4a4c273c7a Add support for the XIVE XICS emulation mode for POWER9 systems
Summary:
POWER9 systems use a new interrupt controller, XIVE, managed through OPAL
firmware calls.  The OPAL firmware includes support for emulating the previous
generation XICS presentation layer in addition to a new "XIVE Exploitation"
mode.  As a stopgap until we have XIVE exploitation mode, enable XICS emulation
mode so that we at least have an interrupt controller.

Since the CPPR is local to the current CPU, it cannot be updated for APs when
initializing on the BSP.  This adds a new function, directly called by the
powernv platform code, to initialize the CPPR on AP bringup.

Reviewed by:	nwhitehorn
Differential Revision: https://reviews.freebsd.org/D15492
2018-05-20 03:23:17 +00:00
jhibbits
d02acb9927 powerpc64: Add OPAL definitions
Summary:
Add additional OPAL PCI definitions and expand the code to use them in order to
ease the OPAL interface process for new comers.

These definitions came directly from the OPAL code and they are the same for
both PHB3 (POWER8) and PHB4 (POWER9).

Submitted by:	Breno Leitao
Differential Revision: https://reviews.freebsd.org/D15432
2018-05-19 04:01:15 +00:00
wma
a61b260648 Reverting r330925 for now 2018-03-15 06:19:45 +00:00
wma
9d6defb064 PowerNV: Fix I2C to compile if FDT is disabled
Submitted by:          Wojciech Macek <wma@semihalf.com>
Obtained from:         Semihalf
Sponsored by:          IBM, QCM Technologies
2018-03-14 09:20:03 +00:00
nwhitehorn
af59ead0bb Fix use of unitialized variables. 2018-03-06 15:52:43 +00:00
wma
8dc5d5fb2d PowerNV: Initial support for OPAL I2C transfers
Add I2C OPAL driver and a set of dummy-ones to allow
all I2C things on Power8 to attach.

TODO: better async token management

Submitted by:          Wojciech Macek <wma@semihalf.com>
Obtained from:         Semihalf
Sponsored by:          IBM, QCM Technologies
2018-03-01 14:11:07 +00:00
wma
7908daef61 PowerNV: Put processor to power-save state in idle thread
When processor enters power-save state it releases resources shared with other
cpu threads which makes other cores working much faster.

This patch also implements saving and restoring registers that might get
corrupted in power-save state.

Submitted by:          Patryk Duda <pdk@semihalf.com>
Obtained from:         Semihalf
Reviewed by:           jhibbits, nwhitehorn, wma
Sponsored by:          IBM, QCM Technologies
Differential revision: https://reviews.freebsd.org/D14330
2018-02-21 14:28:40 +00:00
wma
916a28b415 PowerNV: add missing RTC_WRITE support
Add function which can store RTC values to OPAL.

Submitted by:          Wojciech Macek <wma@semihalf.org>
Obtained from:         Semihalf
Sponsored by:          IBM, QCM Technologies
2018-02-21 08:13:17 +00:00
wma
9f95158c50 PowerNV: move LPCR and LPID altering to cpudep_ap_early_bootstrap
It turns out that under some circumstances we can get DSI or DSE before we set
LPCR and LPID so we should set it as early as possible.

Authored by:           Patryk Duda <pdk@semihalf.com>
Submitted by:          Wojciech Macek <wma@semihalf.com>
Obtained from:         Semihalf
Sponsored by:          IBM, QCM Technologies
2018-01-29 09:27:02 +00:00
wma
bb9cfb4be4 PPC64: use hwref instead of cpuid
On CHRP and PowerNV, use the interrupt server number in the cpuref and pcpu
hwref field instead of the device-tree phandle and make the CPU IDs reported
to the scheduler dense and with the BSP at 0.

Submitted by:          Wojciech Macek <wma@semihalf.com>
Obtained from:         Semihalf
Sponsored by:          IBM, QCM Technologies
Differential revision: https://reviews.freebsd.org/D14011
2018-01-29 09:15:38 +00:00
wma
b6831d3506 PPC64: cleanup APs startup routines
Cleaning up AP startup routines. This is a mix of changes
required to make PowerNV running and to modify the code
to be more robust. Previously, some races were seen if more
than 90CPUs were online.

Authored by:           Patryk Duda <pdk@semihalf.com>
Submitted by:          Wojciech Macek <wma@semihalf.com>
Obtained from:         Semihalf
Sponsored by:          IBM, QCM Technologies
Differential revision: https://reviews.freebsd.org/D14026
2018-01-29 08:10:03 +00:00
wma
46822a0e45 PowerNV: send MSI_EOI always after MSI unmask
MSI/MSI-x interrupts are edge-triggered. If an interrupt
arrives when IRQ line is masked, it will be lost and will
never recover. Perform MSI_EOI always after unmask to give
a chance for PHB/XICS to send an interrupt again if MSI/MSI-x
pending bit is set in MSI/MSI-x BAR space.

Submitted by:          Wojciech Macek <wma@semihalf.org>
Obtained from:         Semihalf
Sponsored by:          IBM, QCM Technologies
2018-01-23 08:07:00 +00:00
wma
842790678f PowerNV: workaround console on OPAL 5.4
FreeBSD prints text char-by-char, which is not what OPAL
is designed to. Poll events more frequently to avoid buffer
overflow and loosing data.

Created by:            Wojciech Macek <wma@semihalf.com>
Obtained from:         Semihalf
Sponsored by:          QCM Technologies
2018-01-17 08:01:51 +00:00
wma
4b5982d8ab PowerNV: make PowerNV PCIe working on a real hardware
Fixes:
- map all devices to PE0
- use 1:1 TCE mapping
- provide the same TCE mapping for all PEs (not only PE0)
- add TCE reset and alignment (required by OPAL)

Created by:            Wojciech Macek <wma@semihalf.com>
Obtained from:         Semihalf
Sponsored by:          QCM Technologies
2018-01-17 07:39:11 +00:00
wma
b76b1a3176 PowerNV: XICS support for PowerNV/OPAL
Make XICS to be OPAL-aware.

Created by:            Nathan Whitehorn <nwhitehorn@freebsd.org>
Submitted by:          Wojciech Macek <wma@semihalf.com>
Sponsored by:          FreeBSD Foundation
2018-01-16 06:24:19 +00:00
wma
6c1a57398d PowerNV: update OPAL driver
Update OPAL driver with:
- better console support
- proper AP configuration
- enhanced IRQ/OFW mapping
- RTC support

Created by:            Nathan Whitehorn <nwhitehorn@freebsd.org>
Submitted by:          Wojciech Macek <wma@semihalf.com>
Sponsored by:          FreeBSD Foundation
2018-01-12 12:14:52 +00:00
wma
7c03aec9b6 PowerNV: initial support for PCIe host controller
Provide initial support for PCIe host controller as
well as for IOMMU mapping. This commit allows proper
bus enumeration, but does not guarantee DMA operations
are working.

Created by:            Nathan Whitehorn <nwhitehorn@freebsd.org>
Submitted by:          Wojciech Macek <wma@semihalf.com>
Sponsored by:          FreeBSD Foundation
2018-01-12 07:55:49 +00:00
wma
0f2da3f309 PowerNV: add buffer for OPAL console
Avoid the lock in vtophys() by providing a static direct-mapped
spinlock- protected output buffer to use when the console driver
cannot acquire locks for some reason. This allows the idle thread
to use printf() (e.g. the SMP startup messages) without crashing
the kernel.

Created by:            Nathan Whitehorn <nwhitehorn@freebsd.org>
Submitted by:          Wojciech Macek <wma@freebsd.org>
Sponsored by:          FreeBSD Foundation
2018-01-11 09:42:24 +00:00
wma
d13ea8aef4 PowerNV: set LPCR[LPES] correctly
Make sure to set LPCR[LPES] so that external interrupts set SRR0 and SRR1
instead of HSRR0 and HSRR1. Without this, external interrupt handlers would
get the wrong MSR value when executing, causing eventual madness.

Created by:            Nathan Whitehorn <nwhitehorn@freebsd.org>
Submitted by:          Wojciech Macek <wma@freebsd.org>
Sponsored by:          FreeBSD Foundation
2018-01-11 09:39:38 +00:00
wma
2c77116bf2 PowerNV: correctly start secondary CPUs
Fix AP startup, which was broken.

Created by:            Nathan Whitehorn <nwhitehorn@freebsd.org>
Submitted by:          Wojciech Macek <wma@freebsd.org>
Sponsored by:          FreeBSD Foundation
2018-01-11 09:34:33 +00:00
wma
999af6c5ea PowerNV: add reset, poweroff, OPAL console
Add basic power control (reset, power off) and bind
ttyuX to opal console so that init will start login there.

Created by:            Nathan Whitehorn <nw@freebsd.org>
Submitted by:          Wojciech Macek <wma@freebsd.org>
Sponsored by:          FreeBSD Foundation
2018-01-11 09:26:28 +00:00
wma
887505b72d PowerNV: initial support for OPAL
OPAL is a dedicated firmware acting as a hypervisor.
Add generic functions to provide all access.

Created by:            Nathan Whitehorn <nw@freebsd.org>
Submitted by:          Wojciech Macek <wma@freebsd.org>
2018-01-11 07:40:06 +00:00