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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-11 17:48:14 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-11 17:48:14 -0800 |
commit | 140cd7fb04a4a2bc09a30980bc8104cc89e09330 (patch) | |
tree | 776d57c7508f946d592de4334d4d3cb50fd36220 /Documentation/devicetree/bindings/soc/fsl/qman.txt | |
parent | 27afc5dbda52ee3dbcd0bda7375c917c6936b470 (diff) | |
parent | 56548fc0e86cb9156af7a7e1f15ba78f251dafaf (diff) |
Merge tag 'powerpc-3.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux
Pull powerpc updates from Michael Ellerman:
"Some nice cleanups like removing bootmem, and removal of
__get_cpu_var().
There is one patch to mm/gup.c. This is the generic GUP
implementation, but is only used by us and arm(64). We have an ack
from Steve Capper, and although we didn't get an ack from Andrew he
told us to take the patch through the powerpc tree.
There's one cxl patch. This is in drivers/misc, but Greg said he was
happy for us to manage fixes for it.
There is an infrastructure patch to support an IPMI driver for OPAL.
There is also an RTC driver for OPAL. We weren't able to get any
response from the RTC maintainer, Alessandro Zummo, so in the end we
just merged the driver.
The usual batch of Freescale updates from Scott"
* tag 'powerpc-3.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: (101 commits)
powerpc/powernv: Return to cpu offline loop when finished in KVM guest
powerpc/book3s: Fix partial invalidation of TLBs in MCE code.
powerpc/mm: don't do tlbie for updatepp request with NO HPTE fault
powerpc/xmon: Cleanup the breakpoint flags
powerpc/xmon: Enable HW instruction breakpoint on POWER8
powerpc/mm/thp: Use tlbiel if possible
powerpc/mm/thp: Remove code duplication
powerpc/mm/hugetlb: Sanity check gigantic hugepage count
powerpc/oprofile: Disable pagefaults during user stack read
powerpc/mm: Check for matching hpte without taking hpte lock
powerpc: Drop useless warning in eeh_init()
powerpc/powernv: Cleanup unused MCE definitions/declarations.
powerpc/eeh: Dump PHB diag-data early
powerpc/eeh: Recover EEH error on ownership change for BCM5719
powerpc/eeh: Set EEH_PE_RESET on PE reset
powerpc/eeh: Refactor eeh_reset_pe()
powerpc: Remove more traces of bootmem
powerpc/pseries: Initialise nvram_pstore_info's buf_lock
cxl: Name interrupts in /proc/interrupt
cxl: Return error to PSL if IRQ demultiplexing fails & print clearer warning
...
Diffstat (limited to 'Documentation/devicetree/bindings/soc/fsl/qman.txt')
-rw-r--r-- | Documentation/devicetree/bindings/soc/fsl/qman.txt | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/soc/fsl/qman.txt b/Documentation/devicetree/bindings/soc/fsl/qman.txt new file mode 100644 index 000000000000..063e3a0b9d04 --- /dev/null +++ b/Documentation/devicetree/bindings/soc/fsl/qman.txt @@ -0,0 +1,165 @@ +QorIQ DPAA Queue Manager Device Tree Binding + +Copyright (C) 2008 - 2014 Freescale Semiconductor Inc. + +CONTENTS + + - QMan Node + - QMan Private Memory Nodes + - Example + +QMan Node + +The Queue Manager is part of the Data-Path Acceleration Architecture (DPAA). QMan +supports queuing and QoS scheduling of frames to CPUs, network interfaces and +DPAA logic modules, maintains packet ordering within flows. Besides providing +flow-level queuing, is also responsible for congestion management functions such +as RED/WRED, congestion notifications and tail discards. This binding covers the +CCSR space programming model + +PROPERTIES + +- compatible + Usage: Required + Value type: <stringlist> + Definition: Must include "fsl,qman" + May include "fsl,<SoC>-qman" + +- reg + Usage: Required + Value type: <prop-encoded-array> + Definition: Registers region within the CCSR address space + +The QMan revision information is located in the QMAN_IP_REV_1/2 registers which +are located at offsets 0xbf8 and 0xbfc + +- interrupts + Usage: Required + Value type: <prop-encoded-array> + Definition: Standard property. The error interrupt + +- fsl,liodn + Usage: See pamu.txt + Value type: <prop-encoded-array> + Definition: PAMU property used for static LIODN assignment + +- fsl,iommu-parent + Usage: See pamu.txt + Value type: <phandle> + Definition: PAMU property used for dynamic LIODN assignment + + For additional details about the PAMU/LIODN binding(s) see pamu.txt + +- clocks + Usage: See clock-bindings.txt and qoriq-clock.txt + Value type: <prop-encoded-array> + Definition: Reference input clock. Its frequency is half of the + platform clock + +Devices connected to a QMan instance via Direct Connect Portals (DCP) must link +to the respective QMan instance + +- fsl,qman + Usage: Required + Value type: <prop-encoded-array> + Description: List of phandle and DCP index pairs, to the QMan instance + to which this device is connected via the DCP + +QMan Private Memory Nodes + +QMan requires two contiguous range of physical memory used for the backing store +for QMan Frame Queue Descriptor (FQD) and Packed Frame Descriptor Record (PFDR). +This memory is reserved/allocated as a nodes under the /reserved-memory node + +The QMan FQD memory node must be named "qman-fqd" + +PROPERTIES + +- compatible + Usage: required + Value type: <stringlist> + Definition: Must inclide "fsl,qman-fqd" + +The QMan PFDR memory node must be named "qman-pfdr" + +PROPERTIES + +- compatible + Usage: required + Value type: <stringlist> + Definition: Must inclide "fsl,qman-pfdr" + +The following constraints are relevant to the FQD and PFDR private memory: + - The size must be 2^(size + 1), with size = 11..29. That is 4 KiB to + 1 GiB + - The alignment must be a muliptle of the memory size + +The size of the FQD and PFDP must be chosen by observing the hardware features +configured via the Reset Configuration Word (RCW) and that are relevant to a +specific board (e.g. number of MAC(s) pinned-out, number of offline/host command +FMan ports, etc.). The size configured in the DT must reflect the hardware +capabilities and not the specific needs of an application + +For additional details about reserved memory regions see reserved-memory.txt + +EXAMPLE + +The example below shows a QMan FQD and a PFDR dynamic allocation memory nodes + + reserved-memory { + #address-cells = <2>; + #size-cells = <2>; + ranges; + + qman_fqd: qman-fqd { + compatible = "fsl,qman-fqd"; + alloc-ranges = <0 0 0xf 0xffffffff>; + size = <0 0x400000>; + alignment = <0 0x400000>; + }; + qman_pfdr: qman-pfdr { + compatible = "fsl,qman-pfdr"; + alloc-ranges = <0 0 0xf 0xffffffff>; + size = <0 0x2000000>; + alignment = <0 0x2000000>; + }; + }; + +The example below shows a (P4080) QMan CCSR-space node + + clockgen: global-utilities@e1000 { + ... + sysclk: sysclk { + ... + }; + ... + platform_pll: platform-pll@c00 { + #clock-cells = <1>; + reg = <0xc00 0x4>; + compatible = "fsl,qoriq-platform-pll-1.0"; + clocks = <&sysclk>; + clock-output-names = "platform-pll", "platform-pll-div2"; + }; + ... + }; + + crypto@300000 { + ... + fsl,qman = <&qman, 2>; + ... + }; + + qman: qman@318000 { + compatible = "fsl,qman"; + reg = <0x318000 0x1000>; + interrupts = <16 2 1 3> + fsl,liodn = <0x16>; + memory-region = <&qman_fqd &qman_pfdr>; + clocks = <&platform_pll 1>; + }; + + fman@400000 { + ... + fsl,qman = <&qman, 0>; + ... + }; |