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baseband/fpga_5gnr_fec: support interrupt

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Adding support for interrupt capability in the PMD
and the related operations.

Signed-off-by: Nicolas Chautru <nicolas.chautru@intel.com>
Acked-by: Dave Burley <dave.burley@accelercomm.com>
Acked-by: Niall Power <niall.power@intel.com>
Acked-by: Akhil Goyal <akhil.goyal@nxp.com>
This commit is contained in:
Nicolas Chautru 2020-04-18 15:46:47 -07:00 committed by Akhil Goyal
parent 4d9199e3e9
commit b7b1ba6450
1 changed files with 139 additions and 0 deletions
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139
drivers/baseband/fpga_5gnr_fec/rte_fpga_5gnr_fec.c
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@ -325,6 +325,7 @@ fpga_dev_info_get(struct rte_bbdev *dev,
RTE_BBDEV_LDPC_INTERNAL_HARQ_MEMORY_IN_ENABLE |
RTE_BBDEV_LDPC_INTERNAL_HARQ_MEMORY_OUT_ENABLE |
RTE_BBDEV_LDPC_INTERNAL_HARQ_MEMORY_LOOPBACK |
RTE_BBDEV_LDPC_DEC_INTERRUPTS |
RTE_BBDEV_LDPC_INTERNAL_HARQ_MEMORY_FILLERS,
.llr_size = 6,
.llr_decimals = 2,
@ -636,14 +637,152 @@ fpga_queue_stop(struct rte_bbdev *dev, uint16_t queue_id)
return 0;
}
static inline uint16_t
get_queue_id(struct rte_bbdev_data *data, uint8_t q_idx)
{
uint16_t queue_id;
for (queue_id = 0; queue_id < data->num_queues; ++queue_id) {
struct fpga_queue *q = data->queues[queue_id].queue_private;
if (q != NULL && q->q_idx == q_idx)
return queue_id;
}
return -1;
}
/* Interrupt handler triggered by FPGA dev for handling specific interrupt */
static void
fpga_dev_interrupt_handler(void *cb_arg)
{
struct rte_bbdev *dev = cb_arg;
struct fpga_5gnr_fec_device *fpga_dev = dev->data->dev_private;
struct fpga_queue *q;
uint64_t ring_head;
uint64_t q_idx;
uint16_t queue_id;
uint8_t i;
/* Scan queue assigned to this device */
for (i = 0; i < FPGA_TOTAL_NUM_QUEUES; ++i) {
q_idx = 1ULL << i;
if (fpga_dev->q_bound_bit_map & q_idx) {
queue_id = get_queue_id(dev->data, i);
if (queue_id == (uint16_t) -1)
continue;
/* Check if completion head was changed */
q = dev->data->queues[queue_id].queue_private;
ring_head = *q->ring_head_addr;
if (q->shadow_completion_head != ring_head &&
q->irq_enable == 1) {
q->shadow_completion_head = ring_head;
rte_bbdev_pmd_callback_process(
dev,
RTE_BBDEV_EVENT_DEQUEUE,
&queue_id);
}
}
}
}
static int
fpga_queue_intr_enable(struct rte_bbdev *dev, uint16_t queue_id)
{
struct fpga_queue *q = dev->data->queues[queue_id].queue_private;
if (!rte_intr_cap_multiple(dev->intr_handle))
return -ENOTSUP;
q->irq_enable = 1;
return 0;
}
static int
fpga_queue_intr_disable(struct rte_bbdev *dev, uint16_t queue_id)
{
struct fpga_queue *q = dev->data->queues[queue_id].queue_private;
q->irq_enable = 0;
return 0;
}
static int
fpga_intr_enable(struct rte_bbdev *dev)
{
int ret;
uint8_t i;
if (!rte_intr_cap_multiple(dev->intr_handle)) {
rte_bbdev_log(ERR, "Multiple intr vector is not supported by FPGA (%s)",
dev->data->name);
return -ENOTSUP;
}
/* Create event file descriptors for each of 64 queue. Event fds will be
* mapped to FPGA IRQs in rte_intr_enable(). This is a 1:1 mapping where
* the IRQ number is a direct translation to the queue number.
*
* 63 (FPGA_NUM_INTR_VEC) event fds are created as rte_intr_enable()
* mapped the first IRQ to already created interrupt event file
* descriptor (intr_handle->fd).
*/
if (rte_intr_efd_enable(dev->intr_handle, FPGA_NUM_INTR_VEC)) {
rte_bbdev_log(ERR, "Failed to create fds for %u queues",
dev->data->num_queues);
return -1;
}
/* TODO Each event file descriptor is overwritten by interrupt event
* file descriptor. That descriptor is added to epoll observed list.
* It ensures that callback function assigned to that descriptor will
* invoked when any FPGA queue issues interrupt.
*/
for (i = 0; i < FPGA_NUM_INTR_VEC; ++i)
dev->intr_handle->efds[i] = dev->intr_handle->fd;
if (!dev->intr_handle->intr_vec) {
dev->intr_handle->intr_vec = rte_zmalloc("intr_vec",
dev->data->num_queues * sizeof(int), 0);
if (!dev->intr_handle->intr_vec) {
rte_bbdev_log(ERR, "Failed to allocate %u vectors",
dev->data->num_queues);
return -ENOMEM;
}
}
ret = rte_intr_enable(dev->intr_handle);
if (ret < 0) {
rte_bbdev_log(ERR,
"Couldn't enable interrupts for device: %s",
dev->data->name);
return ret;
}
ret = rte_intr_callback_register(dev->intr_handle,
fpga_dev_interrupt_handler, dev);
if (ret < 0) {
rte_bbdev_log(ERR,
"Couldn't register interrupt callback for device: %s",
dev->data->name);
return ret;
}
return 0;
}
static const struct rte_bbdev_ops fpga_ops = {
.setup_queues = fpga_setup_queues,
.intr_enable = fpga_intr_enable,
.close = fpga_dev_close,
.info_get = fpga_dev_info_get,
.queue_setup = fpga_queue_setup,
.queue_stop = fpga_queue_stop,
.queue_start = fpga_queue_start,
.queue_release = fpga_queue_release,
.queue_intr_enable = fpga_queue_intr_enable,
.queue_intr_disable = fpga_queue_intr_disable
};
static inline void