Re: [PATCH v3 1/4] baseband/acc100: introduce PMD for ACC101

[Maxime Coquelin <maxime.coquelin@redhat.com>]

Hi Nicolas,

On 5/16/22 22:48, Nicolas Chautru wrote:
> Support for ACC101 as a derivative of ACC100.
> Reusing existing code when possible.
> 
> Signed-off-by: Nicolas Chautru <nicolas.chautru@intel.com>
> ---
>   doc/guides/bbdevs/acc101.rst             | 237 +++++++++++++++++++++++++++++++
>   doc/guides/bbdevs/features/acc101.ini    |  13 ++
>   doc/guides/bbdevs/index.rst              |   1 +
>   doc/guides/rel_notes/release_22_07.rst   |   4 +
>   drivers/baseband/acc100/rte_acc100_pmd.c | 194 ++++++++++++++++++++++++-
>   drivers/baseband/acc100/rte_acc100_pmd.h |   6 +
>   drivers/baseband/acc100/rte_acc101_pmd.h |  65 +++++++++
>   7 files changed, 515 insertions(+), 5 deletions(-)
>   create mode 100644 doc/guides/bbdevs/acc101.rst
>   create mode 100644 doc/guides/bbdevs/features/acc101.ini
>   create mode 100644 drivers/baseband/acc100/rte_acc101_pmd.h
> 

It seems most of Tom's comments on v2 have not been addressed.

Overall, ACC100 & ACC101 are very similar, I think it does not make 
sense in to have two drivers being declared and two documentation files.

> diff --git a/doc/guides/bbdevs/acc101.rst b/doc/guides/bbdevs/acc101.rst
> new file mode 100644
> index 0000000..46c310b
> --- /dev/null
> +++ b/doc/guides/bbdevs/acc101.rst
> @@ -0,0 +1,237 @@
> +..  SPDX-License-Identifier: BSD-3-Clause
> +    Copyright(c) 2020 Intel Corporation
> +
> +Intel(R) ACC101 5G/4G FEC Poll Mode Driver
> +==========================================
> +
> +The BBDEV ACC101 5G/4G FEC poll mode driver (PMD) supports an
> +implementation of a VRAN FEC wireless acceleration function.
> +This device is also known as Mount Cirrus.
> +This is a follow-up to Mount Bryce (ACC100) and includes fixes, improved
> +feature set for error scenarios and performance capacity increase.
> +
> +Features
> +--------
> +
> +ACC101 5G/4G FEC PMD supports the following features:
> +
> +- LDPC Encode in the DL (5GNR)
> +- LDPC Decode in the UL (5GNR)
> +- Turbo Encode in the DL (4G)
> +- Turbo Decode in the UL (4G)
> +- 16 VFs per PF (physical device)
> +- Maximum of 128 queues per VF
> +- PCIe Gen-3 x16 Interface
> +- MSI
> +- SR-IOV
> +
> +ACC101 5G/4G FEC PMD supports the following BBDEV capabilities:
> +
> +* For the LDPC encode operation:
> +   - ``RTE_BBDEV_LDPC_CRC_24B_ATTACH`` :  set to attach CRC24B to CB(s)
> +   - ``RTE_BBDEV_LDPC_RATE_MATCH`` :  if set then do not do Rate Match bypass
> +   - ``RTE_BBDEV_LDPC_INTERLEAVER_BYPASS`` : if set then bypass interleaver
> +
> +* For the LDPC decode operation:
> +   - ``RTE_BBDEV_LDPC_CRC_TYPE_24B_CHECK`` :  check CRC24B from CB(s)
> +   - ``RTE_BBDEV_LDPC_ITERATION_STOP_ENABLE`` :  disable early termination
> +   - ``RTE_BBDEV_LDPC_CRC_TYPE_24B_DROP`` :  drops CRC24B bits appended while decoding
> +   - ``RTE_BBDEV_LDPC_HQ_COMBINE_IN_ENABLE`` :  provides an input for HARQ combining
> +   - ``RTE_BBDEV_LDPC_HQ_COMBINE_OUT_ENABLE`` :  provides an input for HARQ combining
> +   - ``RTE_BBDEV_LDPC_INTERNAL_HARQ_MEMORY_IN_ENABLE`` :  HARQ memory input is internal
> +   - ``RTE_BBDEV_LDPC_INTERNAL_HARQ_MEMORY_OUT_ENABLE`` :  HARQ memory output is internal
> +   - ``RTE_BBDEV_LDPC_INTERNAL_HARQ_MEMORY_LOOPBACK`` :  loopback data to/from HARQ memory
> +   - ``RTE_BBDEV_LDPC_INTERNAL_HARQ_MEMORY_FILLERS`` :  HARQ memory includes the fillers bits
> +   - ``RTE_BBDEV_LDPC_DEC_SCATTER_GATHER`` :  supports scatter-gather for input/output data
> +   - ``RTE_BBDEV_LDPC_HARQ_6BIT_COMPRESSION`` :  supports compression of the HARQ input/output
> +   - ``RTE_BBDEV_LDPC_LLR_COMPRESSION`` :  supports LLR input compression
> +
> +* For the turbo encode operation:
> +   - ``RTE_BBDEV_TURBO_CRC_24B_ATTACH`` :  set to attach CRC24B to CB(s)
> +   - ``RTE_BBDEV_TURBO_RATE_MATCH`` :  if set then do not do Rate Match bypass
> +   - ``RTE_BBDEV_TURBO_ENC_INTERRUPTS`` :  set for encoder dequeue interrupts
> +   - ``RTE_BBDEV_TURBO_RV_INDEX_BYPASS`` :  set to bypass RV index
> +   - ``RTE_BBDEV_TURBO_ENC_SCATTER_GATHER`` :  supports scatter-gather for input/output data
> +
> +* For the turbo decode operation:
> +   - ``RTE_BBDEV_TURBO_CRC_TYPE_24B`` :  check CRC24B from CB(s)
> +   - ``RTE_BBDEV_TURBO_SUBBLOCK_DEINTERLEAVE`` :  perform subblock de-interleave
> +   - ``RTE_BBDEV_TURBO_DEC_INTERRUPTS`` :  set for decoder dequeue interrupts
> +   - ``RTE_BBDEV_TURBO_NEG_LLR_1_BIT_IN`` :  set if negative LLR encoder i/p is supported
> +   - ``RTE_BBDEV_TURBO_POS_LLR_1_BIT_IN`` :  set if positive LLR encoder i/p is supported
> +   - ``RTE_BBDEV_TURBO_DEC_TB_CRC_24B_KEEP`` :  keep CRC24B bits appended while decoding
> +   - ``RTE_BBDEV_TURBO_DEC_CRC_24B_DROP`` : option to drop the code block CRC after decoding
> +   - ``RTE_BBDEV_TURBO_EARLY_TERMINATION`` :  set early termination feature
> +   - ``RTE_BBDEV_TURBO_DEC_SCATTER_GATHER`` :  supports scatter-gather for input/output data
> +   - ``RTE_BBDEV_TURBO_HALF_ITERATION_EVEN`` :  set half iteration granularity
> +
> +Installation
> +------------
> +
> +Section 3 of the DPDK manual provides instructions on installing and compiling DPDK.
> +
> +DPDK requires hugepages to be configured as detailed in section 2 of the DPDK manual.
> +The bbdev test application has been tested with a configuration 40 x 1GB hugepages. The
> +hugepage configuration of a server may be examined using:
> +
> +.. code-block:: console
> +
> +   grep Huge* /proc/meminfo
> +
> +
> +Initialization
> +--------------
> +
> +When the device first powers up, its PCI Physical Functions (PF) can be listed through this command:
> +
> +.. code-block:: console
> +
> +  sudo lspci -vd8086:57c4
> +
> +The physical and virtual functions are compatible with Linux UIO drivers:
> +``vfio`` and ``igb_uio``. However, in order to work the ACC101 5G/4G
> +FEC device first needs to be bound to one of these linux drivers through DPDK.
> +
> +
> +Bind PF UIO driver(s)
> +~~~~~~~~~~~~~~~~~~~~~
> +
> +Install the DPDK igb_uio driver, bind it with the PF PCI device ID and use
> +``lspci`` to confirm the PF device is under use by ``igb_uio`` DPDK UIO driver.
> +
> +The igb_uio driver may be bound to the PF PCI device using one of two methods:
> +
> +
> +1. PCI functions (physical or virtual, depending on the use case) can be bound to
> +the UIO driver by repeating this command for every function.
> +
> +.. code-block:: console
> +
> +  cd <dpdk-top-level-directory>
> +  insmod ./build/kmod/igb_uio.ko
> +  echo "8086 57c4" > /sys/bus/pci/drivers/igb_uio/new_id
> +  lspci -vd8086:57c4
> +
> +
> +2. Another way to bind PF with DPDK UIO driver is by using the ``dpdk-devbind.py`` tool
> +
> +.. code-block:: console
> +
> +  cd <dpdk-top-level-directory>
> +  ./usertools/dpdk-devbind.py -b igb_uio 0000:06:00.0
> +
> +where the PCI device ID (example: 0000:06:00.0) is obtained using lspci -vd8086:57c4
> +
> +
> +In a similar way the ACC101 5G/4G FEC PF may be bound with vfio-pci as any PCIe device.
> +
> +
> +Enable Virtual Functions
> +~~~~~~~~~~~~~~~~~~~~~~~~
> +
> +Now, it should be visible in the printouts that PCI PF is under igb_uio control
> +"``Kernel driver in use: igb_uio``"
> +
> +To show the number of available VFs on the device, read ``sriov_totalvfs`` file..
> +
> +.. code-block:: console
> +
> +  cat /sys/bus/pci/devices/0000\:<b>\:<d>.<f>/sriov_totalvfs
> +
> +  where 0000\:<b>\:<d>.<f> is the PCI device ID
> +
> +
> +To enable VFs via igb_uio, echo the number of virtual functions intended to
> +enable to ``max_vfs`` file..
> +
> +.. code-block:: console
> +
> +  echo <num-of-vfs> > /sys/bus/pci/devices/0000\:<b>\:<d>.<f>/max_vfs
> +
> +
> +Afterwards, all VFs must be bound to appropriate UIO drivers as required, same
> +way it was done with the physical function previously.
> +
> +Enabling SR-IOV via vfio driver is pretty much the same, except that the file
> +name is different:
> +
> +.. code-block:: console
> +
> +  echo <num-of-vfs> > /sys/bus/pci/devices/0000\:<b>\:<d>.<f>/sriov_numvfs
> +
> +
> +Configure the VFs through PF
> +~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> +
> +The PCI virtual functions must be configured before working or getting assigned
> +to VMs/Containers. The configuration involves allocating the number of hardware
> +queues, priorities, load balance, bandwidth and other settings necessary for the
> +device to perform FEC functions.
> +
> +This configuration needs to be executed at least once after reboot or PCI FLR and can
> +be achieved by using the function ``acc101_configure()``, which sets up the
> +parameters defined in ``acc100_conf`` structure.
> +
> +Test Application
> +----------------
> +
> +BBDEV provides a test application, ``test-bbdev.py`` and range of test data for testing
> +the functionality of ACC101 5G/4G FEC encode and decode, depending on the device's
> +capabilities. The test application is located under app->test-bbdev folder and has the
> +following options:
> +
> +.. code-block:: console
> +
> +  "-p", "--testapp-path": specifies path to the bbdev test app.
> +  "-e", "--eal-params"	: EAL arguments which are passed to the test app.
> +  "-t", "--timeout"	: Timeout in seconds (default=300).
> +  "-c", "--test-cases"	: Defines test cases to run. Run all if not specified.
> +  "-v", "--test-vector"	: Test vector path (default=dpdk_path+/app/test-bbdev/test_vectors/bbdev_null.data).
> +  "-n", "--num-ops"	: Number of operations to process on device (default=32).
> +  "-b", "--burst-size"	: Operations enqueue/dequeue burst size (default=32).
> +  "-s", "--snr"		: SNR in dB used when generating LLRs for bler tests.
> +  "-s", "--iter_max"	: Number of iterations for LDPC decoder.
> +  "-l", "--num-lcores"	: Number of lcores to run (default=16).
> +  "-i", "--init-device" : Initialise PF device with default values.
> +
> +
> +To execute the test application tool using simple decode or encode data,
> +type one of the following:
> +
> +.. code-block:: console
> +
> +  ./test-bbdev.py -c validation -n 64 -b 1 -v ./ldpc_dec_default.data
> +  ./test-bbdev.py -c validation -n 64 -b 1 -v ./ldpc_enc_default.data
> +
> +
> +The test application ``test-bbdev.py``, supports the ability to configure the PF device with
> +a default set of values, if the "-i" or "- -init-device" option is included. The default values
> +are defined in test_bbdev_perf.c.
> +
> +
> +Test Vectors
> +~~~~~~~~~~~~
> +
> +In addition to the simple LDPC decoder and LDPC encoder tests, bbdev also provides
> +a range of additional tests under the test_vectors folder, which may be useful. The results
> +of these tests will depend on the ACC101 5G/4G FEC capabilities which may cause some
> +testcases to be skipped, but no failure should be reported.
> +
> +
> +Alternate Baseband Device configuration tool
> +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> +
> +On top of the embedded configuration feature supported in test-bbdev using "- -init-device"
> +option mentioned above, there is also a tool available to perform that device configuration
> +using a companion application.
> +The ``pf_bb_config`` application notably enables then to run bbdev-test from the VF
> +and not only limited to the PF as captured above.
> +
> +See for more details: https://github.com/intel/pf-bb-config
> +
> +Specifically for the BBDEV ACC101 PMD, the command below can be used:
> +
> +.. code-block:: console
> +
> +  ./pf_bb_config ACC101 -c acc101/acc101_config_4vf_4g5g.cfg
> +  ./test-bbdev.py -e="-c 0xff0 -a${VF_PCI_ADDR}" -c validation -l 1 -v ./ldpc_dec_default.data
> \ No newline at end of file
> diff --git a/doc/guides/bbdevs/features/acc101.ini b/doc/guides/bbdevs/features/acc101.ini
> new file mode 100644
> index 0000000..0e2c21a
> --- /dev/null
> +++ b/doc/guides/bbdevs/features/acc101.ini
> @@ -0,0 +1,13 @@
> +;
> +; Supported features of the 'acc101' bbdev driver.
> +;
> +; Refer to default.ini for the full list of available PMD features.
> +;
> +[Features]
> +Turbo Decoder (4G)     = Y
> +Turbo Encoder (4G)     = Y
> +LDPC Decoder (5G)      = Y
> +LDPC Encoder (5G)      = Y
> +LLR/HARQ Compression   = Y
> +External DDR Access    = Y
> +HW Accelerated         = Y
> diff --git a/doc/guides/bbdevs/index.rst b/doc/guides/bbdevs/index.rst
> index cedd706..e76883c 100644
> --- a/doc/guides/bbdevs/index.rst
> +++ b/doc/guides/bbdevs/index.rst
> @@ -14,4 +14,5 @@ Baseband Device Drivers
>       fpga_lte_fec
>       fpga_5gnr_fec
>       acc100
> +    acc101
>       la12xx
> diff --git a/doc/guides/rel_notes/release_22_07.rst b/doc/guides/rel_notes/release_22_07.rst
> index 42a5f2d..ef9906b 100644
> --- a/doc/guides/rel_notes/release_22_07.rst
> +++ b/doc/guides/rel_notes/release_22_07.rst
> @@ -55,6 +55,10 @@ New Features
>        Also, make sure to start the actual text at the margin.
>        =======================================================
>   
> +* **Added Intel ACC101 baseband PMD.**
> +
> +  * Added a new baseband PMD for Intel ACC101 device (Mount Cirrus).
> +  * See the :doc:`../bbdevs/acc101` for more details.
>   
>   Removed Items
>   -------------
> diff --git a/drivers/baseband/acc100/rte_acc100_pmd.c b/drivers/baseband/acc100/rte_acc100_pmd.c
> index de7e4bc..fca27ef 100644
> --- a/drivers/baseband/acc100/rte_acc100_pmd.c
> +++ b/drivers/baseband/acc100/rte_acc100_pmd.c
> @@ -22,6 +22,7 @@
>   #include <rte_bbdev.h>
>   #include <rte_bbdev_pmd.h>
>   #include "rte_acc100_pmd.h"
> +#include "rte_acc101_pmd.h"
>   
>   #ifdef RTE_LIBRTE_BBDEV_DEBUG
>   RTE_LOG_REGISTER_DEFAULT(acc100_logtype, DEBUG);
> @@ -1286,6 +1287,12 @@
>   			RTE_BBDEV_TURBO_HALF_ITERATION_EVEN);
>   }
>   
> +static inline bool
> +is_acc100(struct acc100_queue *q)
> +{
> +	return (q->d->device_variant == ACC100_VARIANT);
> +}

You should rely on the PCI ID to differentiate IMHO

> +
>   /* Fill in a frame control word for LDPC decoding. */
>   static inline void
>   acc100_fcw_ld_fill(const struct rte_bbdev_dec_op *op, struct acc100_fcw_ld *fcw,
> @@ -1412,6 +1419,139 @@
>   	}
>   }
>   
> +/* Convert offset to harq index for harq_layout structure */
> +static inline uint32_t hq_index(uint32_t offset)
> +{
> +	return (offset >> ACC100_HARQ_OFFSET_SHIFT) & ACC100_HARQ_OFFSET_MASK;
> +}
> +
> +/* Fill in a frame control word for LDPC decoding for ACC101 */
> +static inline void
> +acc101_fcw_ld_fill(struct rte_bbdev_dec_op *op, struct acc100_fcw_ld *fcw,
> +		union acc100_harq_layout_data *harq_layout)
> +{

This function is quite similar to the acc100 one, it should be possible 
to do it in a single function to avoid duplication and rely on the
device ID when something specific is to be done.

> +	uint16_t harq_out_length, harq_in_length, ncb_p, k0_p, parity_offset;
> +	uint32_t harq_index;
> +	uint32_t l;
> +
> +	fcw->qm = op->ldpc_dec.q_m;
> +	fcw->nfiller = op->ldpc_dec.n_filler;
> +	fcw->BG = (op->ldpc_dec.basegraph - 1);
> +	fcw->Zc = op->ldpc_dec.z_c;
> +	fcw->ncb = op->ldpc_dec.n_cb;
> +	fcw->k0 = get_k0(fcw->ncb, fcw->Zc, op->ldpc_dec.basegraph,
> +			op->ldpc_dec.rv_index);
> +	if (op->ldpc_dec.code_block_mode == RTE_BBDEV_CODE_BLOCK)
> +		fcw->rm_e = op->ldpc_dec.cb_params.e;
> +	else
> +		fcw->rm_e = (op->ldpc_dec.tb_params.r <
> +				op->ldpc_dec.tb_params.cab) ?
> +						op->ldpc_dec.tb_params.ea :
> +						op->ldpc_dec.tb_params.eb;
> +
> +	if (unlikely(check_bit(op->ldpc_dec.op_flags,
> +			RTE_BBDEV_LDPC_HQ_COMBINE_IN_ENABLE) &&
> +			(op->ldpc_dec.harq_combined_input.length == 0))) {
> +		rte_bbdev_log(WARNING, "Null HARQ input size provided");
> +		/* Disable HARQ input in that case to carry forward */
> +		op->ldpc_dec.op_flags ^= RTE_BBDEV_LDPC_HQ_COMBINE_IN_ENABLE;
> +	}
> +
> +	fcw->hcin_en = check_bit(op->ldpc_dec.op_flags,
> +			RTE_BBDEV_LDPC_HQ_COMBINE_IN_ENABLE);
> +	fcw->hcout_en = check_bit(op->ldpc_dec.op_flags,
> +			RTE_BBDEV_LDPC_HQ_COMBINE_OUT_ENABLE);
> +	fcw->crc_select = check_bit(op->ldpc_dec.op_flags,
> +			RTE_BBDEV_LDPC_CRC_TYPE_24B_CHECK);
> +	fcw->bypass_dec = check_bit(op->ldpc_dec.op_flags,
> +			RTE_BBDEV_LDPC_DECODE_BYPASS);
> +	fcw->bypass_intlv = check_bit(op->ldpc_dec.op_flags,
> +			RTE_BBDEV_LDPC_DEINTERLEAVER_BYPASS);
> +	if (op->ldpc_dec.q_m == 1) {
> +		fcw->bypass_intlv = 1;
> +		fcw->qm = 2;
> +	}
> +	fcw->hcin_decomp_mode = check_bit(op->ldpc_dec.op_flags,
> +			RTE_BBDEV_LDPC_HARQ_6BIT_COMPRESSION);
> +	fcw->hcout_comp_mode = check_bit(op->ldpc_dec.op_flags,
> +			RTE_BBDEV_LDPC_HARQ_6BIT_COMPRESSION);
> +	fcw->llr_pack_mode = check_bit(op->ldpc_dec.op_flags,
> +			RTE_BBDEV_LDPC_LLR_COMPRESSION);
> +	harq_index = hq_index(op->ldpc_dec.harq_combined_output.offset);
> +	if (fcw->hcin_en > 0) {
> +		harq_in_length = op->ldpc_dec.harq_combined_input.length;
> +		if (fcw->hcin_decomp_mode > 0)
> +			harq_in_length = harq_in_length * 8 / 6;
> +		harq_in_length = RTE_MIN(harq_in_length, op->ldpc_dec.n_cb
> +				- op->ldpc_dec.n_filler);
> +		/* Alignment on next 64B - Already enforced from HC output */
> +		harq_in_length = RTE_ALIGN_FLOOR(harq_in_length, 64);
> +		fcw->hcin_size0 = harq_in_length;
> +		fcw->hcin_offset = 0;
> +		fcw->hcin_size1 = 0;
> +	} else {
> +		fcw->hcin_size0 = 0;
> +		fcw->hcin_offset = 0;
> +		fcw->hcin_size1 = 0;
> +	}
> +
> +	fcw->itmax = op->ldpc_dec.iter_max;
> +	fcw->itstop = check_bit(op->ldpc_dec.op_flags,
> +			RTE_BBDEV_LDPC_ITERATION_STOP_ENABLE);
> +	fcw->synd_precoder = fcw->itstop;
> +	/*
> +	 * These are all implicitly set
> +	 * fcw->synd_post = 0;
> +	 * fcw->so_en = 0;
> +	 * fcw->so_bypass_rm = 0;
> +	 * fcw->so_bypass_intlv = 0;
> +	 * fcw->dec_convllr = 0;
> +	 * fcw->hcout_convllr = 0;
> +	 * fcw->hcout_size1 = 0;
> +	 * fcw->so_it = 0;
> +	 * fcw->hcout_offset = 0;
> +	 * fcw->negstop_th = 0;
> +	 * fcw->negstop_it = 0;
> +	 * fcw->negstop_en = 0;
> +	 * fcw->gain_i = 1;
> +	 * fcw->gain_h = 1;
> +	 */
> +	if (fcw->hcout_en > 0) {
> +		parity_offset = (op->ldpc_dec.basegraph == 1 ? 20 : 8)
> +			* op->ldpc_dec.z_c - op->ldpc_dec.n_filler;
> +		k0_p = (fcw->k0 > parity_offset) ?
> +				fcw->k0 - op->ldpc_dec.n_filler : fcw->k0;
> +		ncb_p = fcw->ncb - op->ldpc_dec.n_filler;
> +		l = RTE_MIN(k0_p + fcw->rm_e, INT16_MAX);
> +		harq_out_length = (uint16_t) fcw->hcin_size0;
> +		harq_out_length = RTE_MAX(harq_out_length, l);
> +		/* Cannot exceed the pruned Ncb circular buffer */
> +		harq_out_length = RTE_MIN(harq_out_length, ncb_p);
> +		/* Alignment on next 64B */
> +		harq_out_length = RTE_ALIGN_CEIL(harq_out_length, 64);
> +		fcw->hcout_size0 = harq_out_length;
> +		fcw->hcout_size1 = 0;
> +		fcw->hcout_offset = 0;
> +		harq_layout[harq_index].offset = fcw->hcout_offset;
> +		harq_layout[harq_index].size0 = fcw->hcout_size0;
> +	} else {
> +		fcw->hcout_size0 = 0;
> +		fcw->hcout_size1 = 0;
> +		fcw->hcout_offset = 0;
> +	}
> +}
> +
> +static inline void
> +acc10x_fcw_ld_fill(struct rte_bbdev_dec_op *op, struct acc100_fcw_ld *fcw,
> +		union acc100_harq_layout_data *harq_layout, struct acc100_queue *q)
> +{
> +	if (is_acc100(q))
> +		return acc100_fcw_ld_fill(op, fcw, harq_layout);
> +	else
> +		return acc101_fcw_ld_fill(op, fcw, harq_layout);
> +}
> +
> +
>   /**
>    * Fills descriptor with data pointers of one block type.
>    *
> @@ -2960,7 +3100,7 @@
>   		struct acc100_fcw_ld *fcw;
>   		uint32_t seg_total_left;
>   		fcw = &desc->req.fcw_ld;
> -		acc100_fcw_ld_fill(op, fcw, harq_layout);
> +		acc10x_fcw_ld_fill(op, fcw, harq_layout, q);
>   
>   		/* Special handling when overusing mbuf */
>   		if (fcw->rm_e < ACC100_MAX_E_MBUF)
> @@ -3027,7 +3167,7 @@
>   	desc = q->ring_addr + desc_idx;
>   	uint64_t fcw_offset = (desc_idx << 8) + ACC100_DESC_FCW_OFFSET;
>   	union acc100_harq_layout_data *harq_layout = q->d->harq_layout;
> -	acc100_fcw_ld_fill(op, &desc->req.fcw_ld, harq_layout);
> +	acc10x_fcw_ld_fill(op, &desc->req.fcw_ld, harq_layout, q);
>   
>   	input = op->ldpc_dec.input.data;
>   	h_output_head = h_output = op->ldpc_dec.hard_output.data;
> @@ -4139,9 +4279,17 @@
>   	dev->dequeue_ldpc_enc_ops = acc100_dequeue_ldpc_enc;
>   	dev->dequeue_ldpc_dec_ops = acc100_dequeue_ldpc_dec;
>   
> -	((struct acc100_device *) dev->data->dev_private)->pf_device =
> -			!strcmp(drv->driver.name,
> -					RTE_STR(ACC100PF_DRIVER_NAME));
> +	if ((!strcmp(drv->driver.name, RTE_STR(ACC100PF_DRIVER_NAME))) ||
> +			(!strcmp(drv->driver.name, RTE_STR(ACC100VF_DRIVER_NAME)))) {
> +		((struct acc100_device *) dev->data->dev_private)->pf_device =
> +				!strcmp(drv->driver.name, RTE_STR(ACC100PF_DRIVER_NAME));
> +		((struct acc100_device *) dev->data->dev_private)->device_variant = ACC100_VARIANT;
> +	} else {
> +		((struct acc100_device *) dev->data->dev_private)->pf_device =
> +				!strcmp(drv->driver.name, RTE_STR(ACC101PF_DRIVER_NAME));
> +		((struct acc100_device *) dev->data->dev_private)->device_variant = ACC101_VARIANT;

Better to rely on the PCI device ID than introducing a new field.

> +	}
> +
>   	((struct acc100_device *) dev->data->dev_private)->mmio_base =
>   			pci_dev->mem_resource[0].addr;
>   
> @@ -4251,6 +4399,42 @@ static int acc100_pci_remove(struct rte_pci_device *pci_dev)
>   RTE_PMD_REGISTER_PCI(ACC100VF_DRIVER_NAME, acc100_pci_vf_driver);
>   RTE_PMD_REGISTER_PCI_TABLE(ACC100VF_DRIVER_NAME, pci_id_acc100_vf_map);
>   
> +/* ACC101 PCI PF address map */
> +static struct rte_pci_id pci_id_acc101_pf_map[] = {
> +	{
> +		RTE_PCI_DEVICE(RTE_ACC101_VENDOR_ID, RTE_ACC101_PF_DEVICE_ID)
> +	},
> +	{.device_id = 0},
> +};
> +
> +/* ACC101 PCI VF address map */
> +static struct rte_pci_id pci_id_acc101_vf_map[] = {
> +	{
> +		RTE_PCI_DEVICE(RTE_ACC101_VENDOR_ID, RTE_ACC101_VF_DEVICE_ID)
> +	},
> +	{.device_id = 0},
> +};
> +
> +
> +static struct rte_pci_driver acc101_pci_pf_driver = {
> +		.probe = acc100_pci_probe,
> +		.remove = acc100_pci_remove,
> +		.id_table = pci_id_acc101_pf_map,
> +		.drv_flags = RTE_PCI_DRV_NEED_MAPPING
> +};
> +
> +static struct rte_pci_driver acc101_pci_vf_driver = {
> +		.probe = acc100_pci_probe,
> +		.remove = acc100_pci_remove,
> +		.id_table = pci_id_acc101_vf_map,
> +		.drv_flags = RTE_PCI_DRV_NEED_MAPPING
> +};
> +
> +RTE_PMD_REGISTER_PCI(ACC101PF_DRIVER_NAME, acc101_pci_pf_driver);
> +RTE_PMD_REGISTER_PCI_TABLE(ACC101PF_DRIVER_NAME, pci_id_acc101_pf_map);
> +RTE_PMD_REGISTER_PCI(ACC101VF_DRIVER_NAME, acc101_pci_vf_driver);
> +RTE_PMD_REGISTER_PCI_TABLE(ACC101VF_DRIVER_NAME, pci_id_acc101_vf_map);
> +
>   /*
>    * Workaround implementation to fix the power on status of some 5GUL engines
>    * This requires DMA permission if ported outside DPDK
> diff --git a/drivers/baseband/acc100/rte_acc100_pmd.h b/drivers/baseband/acc100/rte_acc100_pmd.h
> index cbcece2..6438031 100644
> --- a/drivers/baseband/acc100/rte_acc100_pmd.h
> +++ b/drivers/baseband/acc100/rte_acc100_pmd.h
> @@ -22,6 +22,9 @@
>   #define rte_bbdev_log_debug(fmt, ...)
>   #endif
>   
> +#define ACC100_VARIANT 0
> +#define ACC101_VARIANT 1
> +
>   /* ACC100 PF and VF driver names */
>   #define ACC100PF_DRIVER_NAME           intel_acc100_pf
>   #define ACC100VF_DRIVER_NAME           intel_acc100_vf
> @@ -67,6 +70,8 @@
>   #define ACC100_HARQ_LAYOUT             (64*1024*1024)
>   /* Assume offset for HARQ in memory */
>   #define ACC100_HARQ_OFFSET             (32*1024)
> +#define ACC100_HARQ_OFFSET_SHIFT       15
> +#define ACC100_HARQ_OFFSET_MASK        0x7ffffff
>   /* Mask used to calculate an index in an Info Ring array (not a byte offset) */
>   #define ACC100_INFO_RING_MASK          (ACC100_INFO_RING_NUM_ENTRIES-1)
>   /* Number of Virtual Functions ACC100 supports */
> @@ -590,6 +595,7 @@ struct acc100_device {
>   	uint16_t q_assigned_bit_map[ACC100_NUM_QGRPS];
>   	bool pf_device; /**< True if this is a PF ACC100 device */
>   	bool configured; /**< True if this ACC100 device is configured */
> +	uint16_t device_variant;  /**< Device variant */
>   };
>   
>   /**
> diff --git a/drivers/baseband/acc100/rte_acc101_pmd.h b/drivers/baseband/acc100/rte_acc101_pmd.h
> new file mode 100644
> index 0000000..1c57f63
> --- /dev/null
> +++ b/drivers/baseband/acc100/rte_acc101_pmd.h
> @@ -0,0 +1,65 @@
> +/* SPDX-License-Identifier: BSD-3-Clause
> + * Copyright(c) 2022 Intel Corporation
> + */
> +
> +/* ACC101 PF and VF driver names */
> +#define ACC101PF_DRIVER_NAME           intel_acc101_pf
> +#define ACC101VF_DRIVER_NAME           intel_acc101_vf
> +
> +/* ACC101 PCI vendor & device IDs */
> +#define RTE_ACC101_VENDOR_ID           (0x8086)
> +#define RTE_ACC101_PF_DEVICE_ID        (0x57c4)
> +#define RTE_ACC101_VF_DEVICE_ID        (0x57c5)
> +
> +/* Define as 1 to use only a single FEC engine */
> +#ifndef RTE_ACC101_SINGLE_FEC
> +#define RTE_ACC101_SINGLE_FEC 0
> +#endif

It should be configurable via a dedicated devarg or via the struct 
rte_acc100_conf struct, we shouldn't have to recompile to change the
device configuration.

> +
> +/* Values used in writing to the registers */
> +#define ACC101_REG_IRQ_EN_ALL          0x1FF83FF  /* Enable all interrupts */

This define is never used AFAICS, is that expected?

./drivers/baseband/acc100/rte_acc100_pmd.h:63:#define 
ACC100_REG_IRQ_EN_ALL          0x1FF83FF  /* Enable all interrupts */
./drivers/baseband/acc100/rte_acc101_pmd.h:20:#define 
ACC101_REG_IRQ_EN_ALL          0x1FF83FF  /* Enable all interrupts */
./drivers/baseband/acc100/rte_acc100_pmd.c:590:	acc100_reg_write(d, 
reg_addr->info_ring_en, ACC100_REG_IRQ_EN_ALL);

> +
> +/* Number of Virtual Functions ACC101 supports */
> +#define ACC101_NUM_VFS                  16
> +#define ACC101_NUM_QGRPS                8
> +#define ACC101_NUM_AQS                  16
> +/* All ACC101 Registers alignment are 32bits = 4B */
> +#define ACC101_BYTES_IN_WORD                 4
> +
> +#define ACC101_GRP_ID_SHIFT    10 /* Queue Index Hierarchy */
> +#define ACC101_VF_ID_SHIFT     4  /* Queue Index Hierarchy */
> +#define ACC101_VF_OFFSET_QOS   16 /* offset in Memory specific to QoS Mon */
> +#define ACC101_TMPL_PRI_0      0x03020100
> +#define ACC101_TMPL_PRI_1      0x07060504
> +#define ACC101_TMPL_PRI_2      0x0b0a0908
> +#define ACC101_TMPL_PRI_3      0x0f0e0d0c
> +#define ACC101_WORDS_IN_ARAM_SIZE (128 * 1024 / 4)
> +
> +#define ACC101_NUM_TMPL       32
> +/* Mapping of signals for the available engines */
> +#define ACC101_SIG_UL_5G      0
> +#define ACC101_SIG_UL_5G_LAST 8
> +#define ACC101_SIG_DL_5G      13
> +#define ACC101_SIG_DL_5G_LAST 15
> +#define ACC101_SIG_UL_4G      16
> +#define ACC101_SIG_UL_4G_LAST 19
> +#define ACC101_SIG_DL_4G      27
> +#define ACC101_SIG_DL_4G_LAST 31
> +#define ACC101_NUM_ACCS       5
> +#define ACC101_PF_VAL         2
> +
> +/* ACC101 Configuration */
> +#define ACC101_CFG_DMA_ERROR    0x3D7
> +#define ACC101_CFG_AXI_CACHE    0x11
> +#define ACC101_CFG_QMGR_HI_P    0x0F0F
> +#define ACC101_CFG_PCI_AXI      0xC003
> +#define ACC101_CFG_PCI_BRIDGE   0x40006033
> +#define ACC101_ENGINE_OFFSET    0x1000
> +#define ACC101_LONG_WAIT        1000
> +#define ACC101_GPEX_AXIMAP_NUM  17
> +#define ACC101_CLOCK_GATING_EN  0x30000
> +#define ACC101_DMA_INBOUND      0x104
> +/* DDR Size per VF - 512MB by default
> + * Can be increased up to 4 GB with single PF/VF
> + */
> +#define ACC101_HARQ_DDR         (512 * 1)