[dpdk-dev] [PATCH v10 04/10] baseband/acc100: add queue configuration

Maxime Coquelin maxime.coquelin at redhat.com
Thu Oct 1 17:38:33 CEST 2020



On 10/1/20 5:14 AM, Nicolas Chautru wrote:
> Adding function to create and configure queues for
> the device. Still no capability.
> 
> Signed-off-by: Nicolas Chautru <nicolas.chautru at intel.com>
> Reviewed-by: Rosen Xu <rosen.xu at intel.com>
> Acked-by: Liu Tianjiao <Tianjiao.liu at intel.com>
> ---
>  drivers/baseband/acc100/rte_acc100_pmd.c | 438 ++++++++++++++++++++++++++++++-
>  drivers/baseband/acc100/rte_acc100_pmd.h |  45 ++++
>  2 files changed, 482 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/baseband/acc100/rte_acc100_pmd.c b/drivers/baseband/acc100/rte_acc100_pmd.c
> index 98a17b3..709a7af 100644
> --- a/drivers/baseband/acc100/rte_acc100_pmd.c
> +++ b/drivers/baseband/acc100/rte_acc100_pmd.c
> @@ -26,6 +26,22 @@
>  RTE_LOG_REGISTER(acc100_logtype, pmd.bb.acc100, NOTICE);
>  #endif
>  
> +/* Write to MMIO register address */
> +static inline void
> +mmio_write(void *addr, uint32_t value)
> +{
> +	*((volatile uint32_t *)(addr)) = rte_cpu_to_le_32(value);
> +}
> +
> +/* Write a register of a ACC100 device */
> +static inline void
> +acc100_reg_write(struct acc100_device *d, uint32_t offset, uint32_t payload)
> +{
> +	void *reg_addr = RTE_PTR_ADD(d->mmio_base, offset);
> +	mmio_write(reg_addr, payload);
> +	usleep(ACC100_LONG_WAIT);

Is it really needed to sleep after the MMIO write access?

> +}
> +
>  /* Read a register of a ACC100 device */
>  static inline uint32_t
>  acc100_reg_read(struct acc100_device *d, uint32_t offset)
> @@ -36,6 +52,22 @@
>  	return rte_le_to_cpu_32(ret);
>  }
>  
> +/* Basic Implementation of Log2 for exact 2^N */
> +static inline uint32_t
> +log2_basic(uint32_t value)
> +{
> +	return (value == 0) ? 0 : rte_bsf32(value);
> +}
> +
> +/* Calculate memory alignment offset assuming alignment is 2^N */
> +static inline uint32_t
> +calc_mem_alignment_offset(void *unaligned_virt_mem, uint32_t alignment)
> +{
> +	rte_iova_t unaligned_phy_mem = rte_malloc_virt2iova(unaligned_virt_mem);
> +	return (uint32_t)(alignment -
> +			(unaligned_phy_mem & (alignment-1)));
> +}
> +
>  /* Calculate the offset of the enqueue register */
>  static inline uint32_t
>  queue_offset(bool pf_device, uint8_t vf_id, uint8_t qgrp_id, uint16_t aq_id)
> @@ -208,10 +240,411 @@
>  			acc100_conf->q_dl_5g.aq_depth_log2);
>  }
>  
> +static void
> +free_base_addresses(void **base_addrs, int size)
> +{
> +	int i;
> +	for (i = 0; i < size; i++)
> +		rte_free(base_addrs[i]);
> +}
> +
> +static inline uint32_t
> +get_desc_len(void)
> +{
> +	return sizeof(union acc100_dma_desc);
> +}
> +
> +/* Allocate the 2 * 64MB block for the sw rings */
> +static int
> +alloc_2x64mb_sw_rings_mem(struct rte_bbdev *dev, struct acc100_device *d,
> +		int socket)
> +{
> +	uint32_t sw_ring_size = ACC100_SIZE_64MBYTE;
> +	d->sw_rings_base = rte_zmalloc_socket(dev->device->driver->name,
> +			2 * sw_ring_size, RTE_CACHE_LINE_SIZE, socket);
> +	if (d->sw_rings_base == NULL) {
> +		rte_bbdev_log(ERR, "Failed to allocate memory for %s:%u",
> +				dev->device->driver->name,
> +				dev->data->dev_id);
> +		return -ENOMEM;
> +	}
> +	memset(d->sw_rings_base, 0, ACC100_SIZE_64MBYTE);

Having used zmalloc, the memset looks overkill. Also, it does not clear
all the allocated are, don't know if this is expected.

> +	uint32_t next_64mb_align_offset = calc_mem_alignment_offset(
> +			d->sw_rings_base, ACC100_SIZE_64MBYTE);
> +	d->sw_rings = RTE_PTR_ADD(d->sw_rings_base, next_64mb_align_offset);
> +	d->sw_rings_phys = rte_malloc_virt2iova(d->sw_rings_base) +
> +			next_64mb_align_offset;

sw_rings_phys should be renamed to sw_rings_iova, as it could be a VA if
IOVA_AS_VA more is used.

> +	d->sw_ring_size = ACC100_MAX_QUEUE_DEPTH * get_desc_len();
> +	d->sw_ring_max_depth = d->sw_ring_size / get_desc_len();

d->sw_ring_max_depth = ACC100_MAX_QUEUE_DEPTH;

> +
> +	return 0;
> +}
> +
> +/* Attempt to allocate minimised memory space for sw rings */
> +static void
> +alloc_sw_rings_min_mem(struct rte_bbdev *dev, struct acc100_device *d,
> +		uint16_t num_queues, int socket)
> +{
> +	rte_iova_t sw_rings_base_phy, next_64mb_align_addr_phy;

Same comment regarding phys vs. iova in this function.

> +	uint32_t next_64mb_align_offset;
> +	rte_iova_t sw_ring_phys_end_addr;
> +	void *base_addrs[ACC100_SW_RING_MEM_ALLOC_ATTEMPTS];
> +	void *sw_rings_base;
> +	int i = 0;
> +	uint32_t q_sw_ring_size = ACC100_MAX_QUEUE_DEPTH * get_desc_len();
> +	uint32_t dev_sw_ring_size = q_sw_ring_size * num_queues;
> +
> +	/* Find an aligned block of memory to store sw rings */
> +	while (i < ACC100_SW_RING_MEM_ALLOC_ATTEMPTS) {
> +		/*
> +		 * sw_ring allocated memory is guaranteed to be aligned to
> +		 * q_sw_ring_size at the condition that the requested size is
> +		 * less than the page size
> +		 */
> +		sw_rings_base = rte_zmalloc_socket(
> +				dev->device->driver->name,
> +				dev_sw_ring_size, q_sw_ring_size, socket);
> +
> +		if (sw_rings_base == NULL) {
> +			rte_bbdev_log(ERR,
> +					"Failed to allocate memory for %s:%u",
> +					dev->device->driver->name,
> +					dev->data->dev_id);
> +			break;
> +		}
> +
> +		sw_rings_base_phy = rte_malloc_virt2iova(sw_rings_base);
> +		next_64mb_align_offset = calc_mem_alignment_offset(
> +				sw_rings_base, ACC100_SIZE_64MBYTE);
> +		next_64mb_align_addr_phy = sw_rings_base_phy +
> +				next_64mb_align_offset;
> +		sw_ring_phys_end_addr = sw_rings_base_phy + dev_sw_ring_size;
> +
> +		/* Check if the end of the sw ring memory block is before the
> +		 * start of next 64MB aligned mem address
> +		 */
> +		if (sw_ring_phys_end_addr < next_64mb_align_addr_phy) {
> +			d->sw_rings_phys = sw_rings_base_phy;
> +			d->sw_rings = sw_rings_base;
> +			d->sw_rings_base = sw_rings_base;
> +			d->sw_ring_size = q_sw_ring_size;
> +			d->sw_ring_max_depth = ACC100_MAX_QUEUE_DEPTH;
> +			break;
> +		}
> +		/* Store the address of the unaligned mem block */
> +		base_addrs[i] = sw_rings_base;
> +		i++;
> +	}
> +
> +	/* Free all unaligned blocks of mem allocated in the loop */
> +	free_base_addresses(base_addrs, i);
> +}
> +
> +
> +/* Allocate 64MB memory used for all software rings */
> +static int
> +acc100_setup_queues(struct rte_bbdev *dev, uint16_t num_queues, int socket_id)
> +{
> +	uint32_t phys_low, phys_high, payload;
> +	struct acc100_device *d = dev->data->dev_private;
> +	const struct acc100_registry_addr *reg_addr;
> +
> +	if (d->pf_device && !d->acc100_conf.pf_mode_en) {
> +		rte_bbdev_log(NOTICE,
> +				"%s has PF mode disabled. This PF can't be used.",
> +				dev->data->name);
> +		return -ENODEV;
> +	}
> +
> +	alloc_sw_rings_min_mem(dev, d, num_queues, socket_id);
> +
> +	/* If minimal memory space approach failed, then allocate
> +	 * the 2 * 64MB block for the sw rings
> +	 */
> +	if (d->sw_rings == NULL)
> +		alloc_2x64mb_sw_rings_mem(dev, d, socket_id);
> +
> +	if (d->sw_rings == NULL) {
> +		rte_bbdev_log(NOTICE,
> +				"Failure allocating sw_rings memory");
> +		return -ENODEV;
> +	}
> +
> +	/* Configure ACC100 with the base address for DMA descriptor rings
> +	 * Same descriptor rings used for UL and DL DMA Engines
> +	 * Note : Assuming only VF0 bundle is used for PF mode
> +	 */
> +	phys_high = (uint32_t)(d->sw_rings_phys >> 32);
> +	phys_low  = (uint32_t)(d->sw_rings_phys & ~(ACC100_SIZE_64MBYTE-1));
> +
> +	/* Choose correct registry addresses for the device type */
> +	if (d->pf_device)
> +		reg_addr = &pf_reg_addr;
> +	else
> +		reg_addr = &vf_reg_addr;
> +
> +	/* Read the populated cfg from ACC100 registers */
> +	fetch_acc100_config(dev);
> +
> +	/* Release AXI from PF */
> +	if (d->pf_device)
> +		acc100_reg_write(d, HWPfDmaAxiControl, 1);
> +
> +	acc100_reg_write(d, reg_addr->dma_ring_ul5g_hi, phys_high);
> +	acc100_reg_write(d, reg_addr->dma_ring_ul5g_lo, phys_low);
> +	acc100_reg_write(d, reg_addr->dma_ring_dl5g_hi, phys_high);
> +	acc100_reg_write(d, reg_addr->dma_ring_dl5g_lo, phys_low);
> +	acc100_reg_write(d, reg_addr->dma_ring_ul4g_hi, phys_high);
> +	acc100_reg_write(d, reg_addr->dma_ring_ul4g_lo, phys_low);
> +	acc100_reg_write(d, reg_addr->dma_ring_dl4g_hi, phys_high);
> +	acc100_reg_write(d, reg_addr->dma_ring_dl4g_lo, phys_low);
> +
> +	/*
> +	 * Configure Ring Size to the max queue ring size
> +	 * (used for wrapping purpose)
> +	 */
> +	payload = log2_basic(d->sw_ring_size / 64);
> +	acc100_reg_write(d, reg_addr->ring_size, payload);
> +
> +	/* Configure tail pointer for use when SDONE enabled */
> +	d->tail_ptrs = rte_zmalloc_socket(
> +			dev->device->driver->name,
> +			ACC100_NUM_QGRPS * ACC100_NUM_AQS * sizeof(uint32_t),
> +			RTE_CACHE_LINE_SIZE, socket_id);
> +	if (d->tail_ptrs == NULL) {
> +		rte_bbdev_log(ERR, "Failed to allocate tail ptr for %s:%u",
> +				dev->device->driver->name,
> +				dev->data->dev_id);
> +		rte_free(d->sw_rings);
> +		return -ENOMEM;
> +	}
> +	d->tail_ptr_phys = rte_malloc_virt2iova(d->tail_ptrs);
> +
> +	phys_high = (uint32_t)(d->tail_ptr_phys >> 32);
> +	phys_low  = (uint32_t)(d->tail_ptr_phys);
> +	acc100_reg_write(d, reg_addr->tail_ptrs_ul5g_hi, phys_high);
> +	acc100_reg_write(d, reg_addr->tail_ptrs_ul5g_lo, phys_low);
> +	acc100_reg_write(d, reg_addr->tail_ptrs_dl5g_hi, phys_high);
> +	acc100_reg_write(d, reg_addr->tail_ptrs_dl5g_lo, phys_low);
> +	acc100_reg_write(d, reg_addr->tail_ptrs_ul4g_hi, phys_high);
> +	acc100_reg_write(d, reg_addr->tail_ptrs_ul4g_lo, phys_low);
> +	acc100_reg_write(d, reg_addr->tail_ptrs_dl4g_hi, phys_high);
> +	acc100_reg_write(d, reg_addr->tail_ptrs_dl4g_lo, phys_low);
> +
> +	d->harq_layout = rte_zmalloc_socket("HARQ Layout",
> +			ACC100_HARQ_LAYOUT * sizeof(*d->harq_layout),
> +			RTE_CACHE_LINE_SIZE, dev->data->socket_id);
> +	if (d->harq_layout == NULL) {
> +		rte_bbdev_log(ERR, "Failed to allocate harq_layout for %s:%u",
> +				dev->device->driver->name,
> +				dev->data->dev_id);
> +		rte_free(d->sw_rings);
> +		return -ENOMEM;
> +	}
> +
> +	/* Mark as configured properly */
> +	d->configured = true;
> +
> +	rte_bbdev_log_debug(
> +			"ACC100 (%s) configured  sw_rings = %p, sw_rings_phys = %#"
> +			PRIx64, dev->data->name, d->sw_rings, d->sw_rings_phys);
> +
> +	return 0;
> +}
> +
>  /* Free 64MB memory used for software rings */

Seems to be 2x64MB are allocated.

>  static int
> -acc100_dev_close(struct rte_bbdev *dev  __rte_unused)
> +acc100_dev_close(struct rte_bbdev *dev)
>  {
> +	struct acc100_device *d = dev->data->dev_private;
> +	if (d->sw_rings_base != NULL) {
> +		rte_free(d->tail_ptrs);
> +		rte_free(d->sw_rings_base);
> +		d->sw_rings_base = NULL;
> +	}
> +	usleep(ACC100_LONG_WAIT);

This sleep looks weird, it would need a comment if it is really needed.

> +	return 0;
> +}
> +
> +
> +/**
> + * Report a ACC100 queue index which is free
> + * Return 0 to 16k for a valid queue_idx or -1 when no queue is available
> + * Note : Only supporting VF0 Bundle for PF mode
> + */
> +static int
> +acc100_find_free_queue_idx(struct rte_bbdev *dev,
> +		const struct rte_bbdev_queue_conf *conf)
> +{
> +	struct acc100_device *d = dev->data->dev_private;
> +	int op_2_acc[5] = {0, UL_4G, DL_4G, UL_5G, DL_5G};
> +	int acc = op_2_acc[conf->op_type];
> +	struct rte_q_topology_t *qtop = NULL;

New line.

> +	qtopFromAcc(&qtop, acc, &(d->acc100_conf));
> +	if (qtop == NULL)
> +		return -1;
> +	/* Identify matching QGroup Index which are sorted in priority order */
> +	uint16_t group_idx = qtop->first_qgroup_index;
> +	group_idx += conf->priority;
> +	if (group_idx >= ACC100_NUM_QGRPS ||
> +			conf->priority >= qtop->num_qgroups) {
> +		rte_bbdev_log(INFO, "Invalid Priority on %s, priority %u",
> +				dev->data->name, conf->priority);
> +		return -1;
> +	}
> +	/* Find a free AQ_idx  */
> +	uint16_t aq_idx;
> +	for (aq_idx = 0; aq_idx < qtop->num_aqs_per_groups; aq_idx++) {
> +		if (((d->q_assigned_bit_map[group_idx] >> aq_idx) & 0x1) == 0) {
> +			/* Mark the Queue as assigned */
> +			d->q_assigned_bit_map[group_idx] |= (1 << aq_idx);
> +			/* Report the AQ Index */
> +			return (group_idx << ACC100_GRP_ID_SHIFT) + aq_idx;
> +		}
> +	}
> +	rte_bbdev_log(INFO, "Failed to find free queue on %s, priority %u",
> +			dev->data->name, conf->priority);
> +	return -1;
> +}
> +
> +/* Setup ACC100 queue */
> +static int
> +acc100_queue_setup(struct rte_bbdev *dev, uint16_t queue_id,
> +		const struct rte_bbdev_queue_conf *conf)
> +{
> +	struct acc100_device *d = dev->data->dev_private;
> +	struct acc100_queue *q;
> +	int16_t q_idx;
> +
> +	/* Allocate the queue data structure. */
> +	q = rte_zmalloc_socket(dev->device->driver->name, sizeof(*q),
> +			RTE_CACHE_LINE_SIZE, conf->socket);
> +	if (q == NULL) {
> +		rte_bbdev_log(ERR, "Failed to allocate queue memory");
> +		return -ENOMEM;
> +	}
> +
> +	q->d = d;
> +	q->ring_addr = RTE_PTR_ADD(d->sw_rings, (d->sw_ring_size * queue_id));

You might want to ensure d is not NULL before dereferencing it.

> +	q->ring_addr_phys = d->sw_rings_phys + (d->sw_ring_size * queue_id);
> +
> +	/* Prepare the Ring with default descriptor format */
> +	union acc100_dma_desc *desc = NULL;
> +	unsigned int desc_idx, b_idx;
> +	int fcw_len = (conf->op_type == RTE_BBDEV_OP_LDPC_ENC ?
> +		ACC100_FCW_LE_BLEN : (conf->op_type == RTE_BBDEV_OP_TURBO_DEC ?
> +		ACC100_FCW_TD_BLEN : ACC100_FCW_LD_BLEN));
> +
> +	for (desc_idx = 0; desc_idx < d->sw_ring_max_depth; desc_idx++) {
> +		desc = q->ring_addr + desc_idx;
> +		desc->req.word0 = ACC100_DMA_DESC_TYPE;
> +		desc->req.word1 = 0; /**< Timestamp */
> +		desc->req.word2 = 0;
> +		desc->req.word3 = 0;
> +		uint64_t fcw_offset = (desc_idx << 8) + ACC100_DESC_FCW_OFFSET;
> +		desc->req.data_ptrs[0].address = q->ring_addr_phys + fcw_offset;
> +		desc->req.data_ptrs[0].blen = fcw_len;
> +		desc->req.data_ptrs[0].blkid = ACC100_DMA_BLKID_FCW;
> +		desc->req.data_ptrs[0].last = 0;
> +		desc->req.data_ptrs[0].dma_ext = 0;
> +		for (b_idx = 1; b_idx < ACC100_DMA_MAX_NUM_POINTERS - 1;
> +				b_idx++) {
> +			desc->req.data_ptrs[b_idx].blkid = ACC100_DMA_BLKID_IN;
> +			desc->req.data_ptrs[b_idx].last = 1;
> +			desc->req.data_ptrs[b_idx].dma_ext = 0;
> +			b_idx++;
> +			desc->req.data_ptrs[b_idx].blkid =
> +					ACC100_DMA_BLKID_OUT_ENC;
> +			desc->req.data_ptrs[b_idx].last = 1;
> +			desc->req.data_ptrs[b_idx].dma_ext = 0;
> +		}
> +		/* Preset some fields of LDPC FCW */
> +		desc->req.fcw_ld.FCWversion = ACC100_FCW_VER;
> +		desc->req.fcw_ld.gain_i = 1;
> +		desc->req.fcw_ld.gain_h = 1;
> +	}
> +
> +	q->lb_in = rte_zmalloc_socket(dev->device->driver->name,
> +			RTE_CACHE_LINE_SIZE,
> +			RTE_CACHE_LINE_SIZE, conf->socket);
> +	if (q->lb_in == NULL) {
> +		rte_bbdev_log(ERR, "Failed to allocate lb_in memory");
> +		rte_free(q);
> +		return -ENOMEM;
> +	}
> +	q->lb_in_addr_phys = rte_malloc_virt2iova(q->lb_in);
> +	q->lb_out = rte_zmalloc_socket(dev->device->driver->name,
> +			RTE_CACHE_LINE_SIZE,
> +			RTE_CACHE_LINE_SIZE, conf->socket);
> +	if (q->lb_out == NULL) {
> +		rte_bbdev_log(ERR, "Failed to allocate lb_out memory");
> +		rte_free(q->lb_in);
> +		rte_free(q);
> +		return -ENOMEM;
> +	}
> +	q->lb_out_addr_phys = rte_malloc_virt2iova(q->lb_out);
> +
> +	/*
> +	 * Software queue ring wraps synchronously with the HW when it reaches
> +	 * the boundary of the maximum allocated queue size, no matter what the
> +	 * sw queue size is. This wrapping is guarded by setting the wrap_mask
> +	 * to represent the maximum queue size as allocated at the time when
> +	 * the device has been setup (in configure()).
> +	 *
> +	 * The queue depth is set to the queue size value (conf->queue_size).
> +	 * This limits the occupancy of the queue at any point of time, so that
> +	 * the queue does not get swamped with enqueue requests.
> +	 */
> +	q->sw_ring_depth = conf->queue_size;
> +	q->sw_ring_wrap_mask = d->sw_ring_max_depth - 1;
> +
> +	q->op_type = conf->op_type;
> +
> +	q_idx = acc100_find_free_queue_idx(dev, conf);
> +	if (q_idx == -1) {
> +		rte_free(q->lb_in);
> +		rte_free(q->lb_out);
> +		rte_free(q);
> +		return -1;
> +	}
> +
> +	q->qgrp_id = (q_idx >> ACC100_GRP_ID_SHIFT) & 0xF;
> +	q->vf_id = (q_idx >> ACC100_VF_ID_SHIFT)  & 0x3F;
> +	q->aq_id = q_idx & 0xF;
> +	q->aq_depth = (conf->op_type ==  RTE_BBDEV_OP_TURBO_DEC) ?
> +			(1 << d->acc100_conf.q_ul_4g.aq_depth_log2) :
> +			(1 << d->acc100_conf.q_dl_4g.aq_depth_log2);
> +
> +	q->mmio_reg_enqueue = RTE_PTR_ADD(d->mmio_base,
> +			queue_offset(d->pf_device,
> +					q->vf_id, q->qgrp_id, q->aq_id));
> +
> +	rte_bbdev_log_debug(
> +			"Setup dev%u q%u: qgrp_id=%u, vf_id=%u, aq_id=%u, aq_depth=%u, mmio_reg_enqueue=%p",
> +			dev->data->dev_id, queue_id, q->qgrp_id, q->vf_id,
> +			q->aq_id, q->aq_depth, q->mmio_reg_enqueue);
> +
> +	dev->data->queues[queue_id].queue_private = q;
> +	return 0;
> +}
> +
> +/* Release ACC100 queue */
> +static int
> +acc100_queue_release(struct rte_bbdev *dev, uint16_t q_id)
> +{
> +	struct acc100_device *d = dev->data->dev_private;
> +	struct acc100_queue *q = dev->data->queues[q_id].queue_private;
> +
> +	if (q != NULL) {
> +		/* Mark the Queue as un-assigned */
> +		d->q_assigned_bit_map[q->qgrp_id] &= (0xFFFFFFFF -
> +				(1 << q->aq_id));
> +		rte_free(q->lb_in);
> +		rte_free(q->lb_out);
> +		rte_free(q);
> +		dev->data->queues[q_id].queue_private = NULL;
> +	}
> +
>  	return 0;
>  }
>  
> @@ -262,8 +695,11 @@
>  }
>  
>  static const struct rte_bbdev_ops acc100_bbdev_ops = {
> +	.setup_queues = acc100_setup_queues,
>  	.close = acc100_dev_close,
>  	.info_get = acc100_dev_info_get,
> +	.queue_setup = acc100_queue_setup,
> +	.queue_release = acc100_queue_release,
>  };
>  
>  /* ACC100 PCI PF address map */
> diff --git a/drivers/baseband/acc100/rte_acc100_pmd.h b/drivers/baseband/acc100/rte_acc100_pmd.h
> index de015ca..2508385 100644
> --- a/drivers/baseband/acc100/rte_acc100_pmd.h
> +++ b/drivers/baseband/acc100/rte_acc100_pmd.h
> @@ -522,11 +522,56 @@ struct acc100_registry_addr {
>  	.ddr_range = HWVfDmaDdrBaseRangeRoVf,
>  };
>  
> +/* Structure associated with each queue. */
> +struct __rte_cache_aligned acc100_queue {
> +	union acc100_dma_desc *ring_addr;  /* Virtual address of sw ring */
> +	rte_iova_t ring_addr_phys;  /* Physical address of software ring */
> +	uint32_t sw_ring_head;  /* software ring head */
> +	uint32_t sw_ring_tail;  /* software ring tail */
> +	/* software ring size (descriptors, not bytes) */
> +	uint32_t sw_ring_depth;
> +	/* mask used to wrap enqueued descriptors on the sw ring */
> +	uint32_t sw_ring_wrap_mask;
> +	/* MMIO register used to enqueue descriptors */
> +	void *mmio_reg_enqueue;
> +	uint8_t vf_id;  /* VF ID (max = 63) */
> +	uint8_t qgrp_id;  /* Queue Group ID */
> +	uint16_t aq_id;  /* Atomic Queue ID */
> +	uint16_t aq_depth;  /* Depth of atomic queue */
> +	uint32_t aq_enqueued;  /* Count how many "batches" have been enqueued */
> +	uint32_t aq_dequeued;  /* Count how many "batches" have been dequeued */
> +	uint32_t irq_enable;  /* Enable ops dequeue interrupts if set to 1 */
> +	struct rte_mempool *fcw_mempool;  /* FCW mempool */
> +	enum rte_bbdev_op_type op_type;  /* Type of this Queue: TE or TD */
> +	/* Internal Buffers for loopback input */
> +	uint8_t *lb_in;
> +	uint8_t *lb_out;
> +	rte_iova_t lb_in_addr_phys;
> +	rte_iova_t lb_out_addr_phys;
> +	struct acc100_device *d;
> +};
> +
>  /* Private data structure for each ACC100 device */
>  struct acc100_device {
>  	void *mmio_base;  /**< Base address of MMIO registers (BAR0) */
> +	void *sw_rings_base;  /* Base addr of un-aligned memory for sw rings */
> +	void *sw_rings;  /* 64MBs of 64MB aligned memory for sw rings */
> +	rte_iova_t sw_rings_phys;  /* Physical address of sw_rings */
> +	/* Virtual address of the info memory routed to the this function under
> +	 * operation, whether it is PF or VF.
> +	 */
> +	union acc100_harq_layout_data *harq_layout;
> +	uint32_t sw_ring_size;
>  	uint32_t ddr_size; /* Size in kB */
> +	uint32_t *tail_ptrs; /* Base address of response tail pointer buffer */
> +	rte_iova_t tail_ptr_phys; /* Physical address of tail pointers */
> +	/* Max number of entries available for each queue in device, depending
> +	 * on how many queues are enabled with configure()
> +	 */
> +	uint32_t sw_ring_max_depth;
>  	struct acc100_conf acc100_conf; /* ACC100 Initial configuration */
> +	/* Bitmap capturing which Queues have already been assigned */
> +	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 */
>  };
> 



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