1 .. SPDX-License-Identifier: BSD-3-Clause
2 Copyright(c) 2019 Marvell International Ltd.
4 Marvell OCTEON TX2 Platform Guide
5 =================================
7 This document gives an overview of **Marvell OCTEON TX2** RVU H/W block,
8 packet flow and procedure to build DPDK on OCTEON TX2 platform.
10 More information about OCTEON TX2 SoC can be found at `Marvell Official Website
11 <https://www.marvell.com/embedded-processors/infrastructure-processors/>`_.
13 Supported OCTEON TX2 SoCs
14 -------------------------
20 OCTEON TX2 Resource Virtualization Unit architecture
21 ----------------------------------------------------
23 The :numref:`figure_octeontx2_resource_virtualization` diagram depicts the
24 RVU architecture and a resource provisioning example.
26 .. _figure_octeontx2_resource_virtualization:
28 .. figure:: img/octeontx2_resource_virtualization.*
30 OCTEON TX2 Resource virtualization architecture and provisioning example
33 Resource Virtualization Unit (RVU) on Marvell's OCTEON TX2 SoC maps HW
34 resources belonging to the network, crypto and other functional blocks onto
35 PCI-compatible physical and virtual functions.
37 Each functional block has multiple local functions (LFs) for
38 provisioning to different PCIe devices. RVU supports multiple PCIe SRIOV
39 physical functions (PFs) and virtual functions (VFs).
41 The :numref:`table_octeontx2_rvu_dpdk_mapping` shows the various local
42 functions (LFs) provided by the RVU and its functional mapping to
45 .. _table_octeontx2_rvu_dpdk_mapping:
47 .. table:: RVU managed functional blocks and its mapping to DPDK subsystem
49 +---+-----+--------------------------------------------------------------+
50 | # | LF | DPDK subsystem mapping |
51 +===+=====+==============================================================+
52 | 1 | NIX | rte_ethdev, rte_tm, rte_event_eth_[rt]x_adapter, rte_security|
53 +---+-----+--------------------------------------------------------------+
54 | 2 | NPA | rte_mempool |
55 +---+-----+--------------------------------------------------------------+
56 | 3 | NPC | rte_flow |
57 +---+-----+--------------------------------------------------------------+
58 | 4 | CPT | rte_cryptodev, rte_event_crypto_adapter |
59 +---+-----+--------------------------------------------------------------+
60 | 5 | SSO | rte_eventdev |
61 +---+-----+--------------------------------------------------------------+
62 | 6 | TIM | rte_event_timer_adapter |
63 +---+-----+--------------------------------------------------------------+
64 | 7 | LBK | rte_ethdev |
65 +---+-----+--------------------------------------------------------------+
66 | 8 | DPI | rte_rawdev |
67 +---+-----+--------------------------------------------------------------+
68 | 9 | SDP | rte_ethdev |
69 +---+-----+--------------------------------------------------------------+
70 | 10| REE | rte_regexdev |
71 +---+-----+--------------------------------------------------------------+
73 PF0 is called the administrative / admin function (AF) and has exclusive
74 privileges to provision RVU functional block's LFs to each of the PF/VF.
76 PF/VFs communicates with AF via a shared memory region (mailbox).Upon receiving
77 requests from PF/VF, AF does resource provisioning and other HW configuration.
79 AF is always attached to host, but PF/VFs may be used by host kernel itself,
80 or attached to VMs or to userspace applications like DPDK, etc. So, AF has to
81 handle provisioning/configuration requests sent by any device from any domain.
83 The AF driver does not receive or process any data.
84 It is only a configuration driver used in control path.
86 The :numref:`figure_octeontx2_resource_virtualization` diagram also shows a
87 resource provisioning example where,
89 1. PFx and PFx-VF0 bound to Linux netdev driver.
90 2. PFx-VF1 ethdev driver bound to the first DPDK application.
91 3. PFy ethdev driver, PFy-VF0 ethdev driver, PFz eventdev driver, PFm-VF0 cryptodev driver bound to the second DPDK application.
96 Loopback HW Unit (LBK) receives packets from NIX-RX and sends packets back to NIX-TX.
97 The loopback block has N channels and contains data buffering that is shared across
98 all channels. The LBK HW Unit is abstracted using ethdev subsystem, Where PF0's
99 VFs are exposed as ethdev device and odd-even pairs of VFs are tied together,
100 that is, packets sent on odd VF end up received on even VF and vice versa.
101 This would enable HW accelerated means of communication between two domains
102 where even VF bound to the first domain and odd VF bound to the second domain.
104 Typical application usage models are,
106 #. Communication between the Linux kernel and DPDK application.
107 #. Exception path to Linux kernel from DPDK application as SW ``KNI`` replacement.
108 #. Communication between two different DPDK applications.
113 System DPI Packet Interface unit(SDP) provides PCIe endpoint support for remote host
114 to DMA packets into and out of OCTEON TX2 SoC. SDP interface comes in to live only when
115 OCTEON TX2 SoC is connected in PCIe endpoint mode. It can be used to send/receive
116 packets to/from remote host machine using input/output queue pairs exposed to it.
117 SDP interface receives input packets from remote host from NIX-RX and sends packets
118 to remote host using NIX-TX. Remote host machine need to use corresponding driver
119 (kernel/user mode) to communicate with SDP interface on OCTEON TX2 SoC. SDP supports
120 single PCIe SRIOV physical function(PF) and multiple virtual functions(VF's). Users
121 can bind PF or VF to use SDP interface and it will be enumerated as ethdev ports.
123 The primary use case for SDP is to enable the smart NIC use case. Typical usage models are,
125 #. Communication channel between remote host and OCTEON TX2 SoC over PCIe.
126 #. Transfer packets received from network interface to remote host over PCIe and
129 OCTEON TX2 packet flow
130 ----------------------
132 The :numref:`figure_octeontx2_packet_flow_hw_accelerators` diagram depicts
133 the packet flow on OCTEON TX2 SoC in conjunction with use of various HW accelerators.
135 .. _figure_octeontx2_packet_flow_hw_accelerators:
137 .. figure:: img/octeontx2_packet_flow_hw_accelerators.*
139 OCTEON TX2 packet flow in conjunction with use of HW accelerators
144 This section lists dataplane H/W block(s) available in OCTEON TX2 SoC.
147 See :doc:`../nics/octeontx2` for NIX Ethdev driver information.
149 #. **Mempool Driver**
150 See :doc:`../mempool/octeontx2` for NPA mempool driver information.
152 #. **Event Device Driver**
153 See :doc:`../eventdevs/octeontx2` for SSO event device driver information.
155 #. **DMA Rawdev Driver**
156 See :doc:`../rawdevs/octeontx2_dma` for DMA driver information.
158 #. **Crypto Device Driver**
159 See :doc:`../cryptodevs/octeontx2` for CPT crypto device driver information.
161 #. **Regex Device Driver**
162 See :doc:`../regexdevs/octeontx2` for REE regex device driver information.
164 Procedure to Setup Platform
165 ---------------------------
167 There are three main prerequisites for setting up DPDK on OCTEON TX2
170 1. **OCTEON TX2 Linux kernel driver**
172 The dependent kernel drivers can be obtained from the
173 `kernel.org <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/ethernet/marvell/octeontx2>`_.
175 Alternatively, the Marvell SDK also provides the required kernel drivers.
177 Linux kernel should be configured with the following features enabled:
179 .. code-block:: console
181 # 64K pages enabled for better performance
182 CONFIG_ARM64_64K_PAGES=y
183 CONFIG_ARM64_VA_BITS_48=y
184 # huge pages support enabled
186 CONFIG_HUGETLB_PAGE=y
187 # VFIO enabled with TYPE1 IOMMU at minimum
188 CONFIG_VFIO_IOMMU_TYPE1=y
191 CONFIG_VFIO_NOIOMMU=y
193 CONFIG_VFIO_PCI_MMAP=y
196 # ARMv8.1 LSE atomics
197 CONFIG_ARM64_LSE_ATOMICS=y
199 CONFIG_OCTEONTX2_MBOX=y
200 CONFIG_OCTEONTX2_AF=y
201 # Enable if netdev PF driver required
202 CONFIG_OCTEONTX2_PF=y
203 # Enable if netdev VF driver required
204 CONFIG_OCTEONTX2_VF=y
205 CONFIG_CRYPTO_DEV_OCTEONTX2_CPT=y
206 # Enable if OCTEONTX2 DMA PF driver required
207 CONFIG_OCTEONTX2_DPI_PF=n
209 2. **ARM64 Linux Tool Chain**
211 For example, the *aarch64* Linaro Toolchain, which can be obtained from
212 `here <https://releases.linaro.org/components/toolchain/binaries/7.4-2019.02/aarch64-linux-gnu/>`_.
214 Alternatively, the Marvell SDK also provides GNU GCC toolchain, which is
215 optimized for OCTEON TX2 CPU.
217 3. **Rootfile system**
219 Any *aarch64* supporting filesystem may be used. For example,
220 Ubuntu 15.10 (Wily) or 16.04 LTS (Xenial) userland which can be obtained
221 from `<http://cdimage.ubuntu.com/ubuntu-base/releases/16.04/release/ubuntu-base-16.04.1-base-arm64.tar.gz>`_.
223 Alternatively, the Marvell SDK provides the buildroot based root filesystem.
224 The SDK includes all the above prerequisites necessary to bring up the OCTEON TX2 board.
226 - Follow the DPDK :doc:`../linux_gsg/index` to setup the basic DPDK environment.
232 .. _table_octeontx2_common_debug_options:
234 .. table:: OCTEON TX2 common debug options
236 +---+------------+-------------------------------------------------------+
237 | # | Component | EAL log command |
238 +===+============+=======================================================+
239 | 1 | Common | --log-level='pmd\.octeontx2\.base,8' |
240 +---+------------+-------------------------------------------------------+
241 | 2 | Mailbox | --log-level='pmd\.octeontx2\.mbox,8' |
242 +---+------------+-------------------------------------------------------+
247 The **OCTEON TX2 Linux kernel driver** provides support to dump RVU blocks
248 context or stats using debugfs.
250 Enable ``debugfs`` by:
252 1. Compile kernel with debugfs enabled, i.e ``CONFIG_DEBUGFS=y``.
253 2. Boot OCTEON TX2 with debugfs supported kernel.
254 3. Verify ``debugfs`` mounted by default "mount | grep -i debugfs" or mount it manually by using.
256 .. code-block:: console
258 # mount -t debugfs none /sys/kernel/debug
260 Currently ``debugfs`` supports the following RVU blocks NIX, NPA, NPC, NDC,
263 The file structure under ``/sys/kernel/debug`` is as follows
265 .. code-block:: console
281 | |-- cpt_engines_info
282 | |-- cpt_engines_sts
289 | |-- ndc_rx_hits_miss
291 | |-- ndc_tx_hits_miss
295 | '-- tx_stall_hwissue
304 | '-- rx_miss_act_stats
310 |-- sso_hwgrp_aq_thresh
311 |-- sso_hwgrp_iaq_walk
313 |-- sso_hwgrp_free_list_walk
314 |-- sso_hwgrp_ient_walk
315 '-- sso_hwgrp_taq_walk
317 RVU block LF allocation:
319 .. code-block:: console
321 cat /sys/kernel/debug/octeontx2/rsrc_alloc
323 pcifunc NPA NIX SSO GROUP SSOWS TIM CPT
330 .. code-block:: console
332 cat /sys/kernel/debug/octeontx2/cgx/cgx2/lmac0/stats
334 =======Link Status======
335 Link is UP 40000 Mbps
336 =======RX_STATS======
338 Octets of received packets: 0
339 Received PAUSE packets: 0
340 Received PAUSE and control packets: 0
341 Filtered DMAC0 (NIX-bound) packets: 0
342 Filtered DMAC0 (NIX-bound) octets: 0
343 Packets dropped due to RX FIFO full: 0
344 Octets dropped due to RX FIFO full: 0
346 Filtered DMAC1 (NCSI-bound) packets: 0
347 Filtered DMAC1 (NCSI-bound) octets: 0
348 NCSI-bound packets dropped: 0
349 NCSI-bound octets dropped: 0
350 =======TX_STATS======
351 Packets dropped due to excessive collisions: 0
352 Packets dropped due to excessive deferral: 0
353 Multiple collisions before successful transmission: 0
354 Single collisions before successful transmission: 0
355 Total octets sent on the interface: 0
356 Total frames sent on the interface: 0
357 Packets sent with an octet count < 64: 0
358 Packets sent with an octet count == 64: 0
359 Packets sent with an octet count of 65127: 0
360 Packets sent with an octet count of 128-255: 0
361 Packets sent with an octet count of 256-511: 0
362 Packets sent with an octet count of 512-1023: 0
363 Packets sent with an octet count of 1024-1518: 0
364 Packets sent with an octet count of > 1518: 0
365 Packets sent to a broadcast DMAC: 0
366 Packets sent to the multicast DMAC: 0
367 Transmit underflow and were truncated: 0
368 Control/PAUSE packets sent: 0
372 .. code-block:: console
374 cat /sys/kernel/debug/octeontx2/cpt/cpt_pc
376 CPT instruction requests 0
377 CPT instruction latency 0
378 CPT NCB read requests 0
379 CPT NCB read latency 0
380 CPT read requests caused by UC fills 0
381 CPT active cycles pc 1395642
382 CPT clock count pc 5579867595493
386 .. code-block:: console
388 Usage: echo <nixlf> [cq number/all] > /sys/kernel/debug/octeontx2/nix/cq_ctx
389 cat /sys/kernel/debug/octeontx2/nix/cq_ctx
390 echo 0 0 > /sys/kernel/debug/octeontx2/nix/cq_ctx
391 cat /sys/kernel/debug/octeontx2/nix/cq_ctx
393 =====cq_ctx for nixlf:0 and qidx:0 is=====
404 W2: update_time 31043
421 .. code-block:: console
423 Usage: echo <npalf> [pool number/all] > /sys/kernel/debug/octeontx2/npa/pool_ctx
424 cat /sys/kernel/debug/octeontx2/npa/pool_ctx
425 echo 0 0 > /sys/kernel/debug/octeontx2/npa/pool_ctx
426 cat /sys/kernel/debug/octeontx2/npa/pool_ctx
428 ======POOL : 0=======
429 W0: Stack base 1375bff00
436 W2: stack_max_pages 24315
437 W2: stack_pages 24314
447 W4: update_time 62993
449 W6: ptr_start 1593adf00
450 W7: ptr_end 180000000
456 W8: thresh_qint_idx 0
461 .. code-block:: console
463 cat /sys/kernel/debug/octeontx2/npc/mcam_info
466 RX keywidth : 224bits
467 TX keywidth : 224bits
479 .. code-block:: console
481 Usage: echo [<hws>/all] > /sys/kernel/debug/octeontx2/sso/hws/sso_hws_info
482 echo 0 > /sys/kernel/debug/octeontx2/sso/hws/sso_hws_info
484 ==================================================
485 SSOW HWS[0] Arbitration State 0x0
486 SSOW HWS[0] Guest Machine Control 0x0
487 SSOW HWS[0] SET[0] Group Mask[0] 0xffffffffffffffff
488 SSOW HWS[0] SET[0] Group Mask[1] 0xffffffffffffffff
489 SSOW HWS[0] SET[0] Group Mask[2] 0xffffffffffffffff
490 SSOW HWS[0] SET[0] Group Mask[3] 0xffffffffffffffff
491 SSOW HWS[0] SET[1] Group Mask[0] 0xffffffffffffffff
492 SSOW HWS[0] SET[1] Group Mask[1] 0xffffffffffffffff
493 SSOW HWS[0] SET[1] Group Mask[2] 0xffffffffffffffff
494 SSOW HWS[0] SET[1] Group Mask[3] 0xffffffffffffffff
495 ==================================================
500 DPDK may be compiled either natively on OCTEON TX2 platform or cross-compiled on
501 an x86 based platform.
506 .. code-block:: console
514 Refer to :doc:`../linux_gsg/cross_build_dpdk_for_arm64` for generic arm64 details.
516 .. code-block:: console
518 meson build --cross-file config/arm/arm64_octeontx2_linux_gcc
523 By default, meson cross compilation uses ``aarch64-linux-gnu-gcc`` toolchain,
524 if Marvell toolchain is available then it can be used by overriding the
525 c, cpp, ar, strip ``binaries`` attributes to respective Marvell
526 toolchain binaries in ``config/arm/arm64_octeontx2_linux_gcc`` file.