* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+#include <rte_mempool.h>
+
#include "efx.h"
#include "sfc.h"
#include "sfc_log.h"
+#include "sfc_ev.h"
#include "sfc_rx.h"
+#include "sfc_tweak.h"
+
+/*
+ * Maximum number of Rx queue flush attempt in the case of failure or
+ * flush timeout
+ */
+#define SFC_RX_QFLUSH_ATTEMPTS (3)
+
+/*
+ * Time to wait between event queue polling attempts when waiting for Rx
+ * queue flush done or failed events.
+ */
+#define SFC_RX_QFLUSH_POLL_WAIT_MS (1)
+
+/*
+ * Maximum number of event queue polling attempts when waiting for Rx queue
+ * flush done or failed events. It defines Rx queue flush attempt timeout
+ * together with SFC_RX_QFLUSH_POLL_WAIT_MS.
+ */
+#define SFC_RX_QFLUSH_POLL_ATTEMPTS (2000)
+
+void
+sfc_rx_qflush_done(struct sfc_rxq *rxq)
+{
+ rxq->state |= SFC_RXQ_FLUSHED;
+ rxq->state &= ~SFC_RXQ_FLUSHING;
+}
+
+void
+sfc_rx_qflush_failed(struct sfc_rxq *rxq)
+{
+ rxq->state |= SFC_RXQ_FLUSH_FAILED;
+ rxq->state &= ~SFC_RXQ_FLUSHING;
+}
+
+static void
+sfc_rx_qrefill(struct sfc_rxq *rxq)
+{
+ unsigned int free_space;
+ unsigned int bulks;
+ void *objs[SFC_RX_REFILL_BULK];
+ efsys_dma_addr_t addr[RTE_DIM(objs)];
+ unsigned int added = rxq->added;
+ unsigned int id;
+ unsigned int i;
+ struct sfc_rx_sw_desc *rxd;
+ struct rte_mbuf *m;
+ uint8_t port_id = rxq->port_id;
+
+ free_space = EFX_RXQ_LIMIT(rxq->ptr_mask + 1) -
+ (added - rxq->completed);
+ bulks = free_space / RTE_DIM(objs);
+
+ id = added & rxq->ptr_mask;
+ while (bulks-- > 0) {
+ if (rte_mempool_get_bulk(rxq->refill_mb_pool, objs,
+ RTE_DIM(objs)) < 0) {
+ /*
+ * It is hardly a safe way to increment counter
+ * from different contexts, but all PMDs do it.
+ */
+ rxq->evq->sa->eth_dev->data->rx_mbuf_alloc_failed +=
+ RTE_DIM(objs);
+ break;
+ }
+
+ for (i = 0; i < RTE_DIM(objs);
+ ++i, id = (id + 1) & rxq->ptr_mask) {
+ m = objs[i];
+
+ rxd = &rxq->sw_desc[id];
+ rxd->mbuf = m;
+
+ rte_mbuf_refcnt_set(m, 1);
+ m->data_off = RTE_PKTMBUF_HEADROOM;
+ m->next = NULL;
+ m->nb_segs = 1;
+ m->port = port_id;
+
+ addr[i] = rte_pktmbuf_mtophys(m);
+ }
+
+ efx_rx_qpost(rxq->common, addr, rxq->buf_size,
+ RTE_DIM(objs), rxq->completed, added);
+ added += RTE_DIM(objs);
+ }
+
+ /* Push doorbell if something is posted */
+ if (rxq->added != added) {
+ rxq->added = added;
+ efx_rx_qpush(rxq->common, added, &rxq->pushed);
+ }
+}
+
+static void
+sfc_rx_qpurge(struct sfc_rxq *rxq)
+{
+ unsigned int i;
+ struct sfc_rx_sw_desc *rxd;
+
+ for (i = rxq->completed; i != rxq->added; ++i) {
+ rxd = &rxq->sw_desc[i & rxq->ptr_mask];
+ rte_mempool_put(rxq->refill_mb_pool, rxd->mbuf);
+ rxd->mbuf = NULL;
+ }
+}
+
+static void
+sfc_rx_qflush(struct sfc_adapter *sa, unsigned int sw_index)
+{
+ struct sfc_rxq *rxq;
+ unsigned int retry_count;
+ unsigned int wait_count;
+
+ rxq = sa->rxq_info[sw_index].rxq;
+ SFC_ASSERT(rxq->state & SFC_RXQ_STARTED);
+
+ /*
+ * Retry Rx queue flushing in the case of flush failed or
+ * timeout. In the worst case it can delay for 6 seconds.
+ */
+ for (retry_count = 0;
+ ((rxq->state & SFC_RXQ_FLUSHED) == 0) &&
+ (retry_count < SFC_RX_QFLUSH_ATTEMPTS);
+ ++retry_count) {
+ if (efx_rx_qflush(rxq->common) != 0) {
+ rxq->state |= SFC_RXQ_FLUSH_FAILED;
+ break;
+ }
+ rxq->state &= ~SFC_RXQ_FLUSH_FAILED;
+ rxq->state |= SFC_RXQ_FLUSHING;
+
+ /*
+ * Wait for Rx queue flush done or failed event at least
+ * SFC_RX_QFLUSH_POLL_WAIT_MS milliseconds and not more
+ * than 2 seconds (SFC_RX_QFLUSH_POLL_WAIT_MS multiplied
+ * by SFC_RX_QFLUSH_POLL_ATTEMPTS).
+ */
+ wait_count = 0;
+ do {
+ rte_delay_ms(SFC_RX_QFLUSH_POLL_WAIT_MS);
+ sfc_ev_qpoll(rxq->evq);
+ } while ((rxq->state & SFC_RXQ_FLUSHING) &&
+ (wait_count++ < SFC_RX_QFLUSH_POLL_ATTEMPTS));
+
+ if (rxq->state & SFC_RXQ_FLUSHING)
+ sfc_err(sa, "RxQ %u flush timed out", sw_index);
+
+ if (rxq->state & SFC_RXQ_FLUSH_FAILED)
+ sfc_err(sa, "RxQ %u flush failed", sw_index);
+
+ if (rxq->state & SFC_RXQ_FLUSHED)
+ sfc_info(sa, "RxQ %u flushed", sw_index);
+ }
+
+ sfc_rx_qpurge(rxq);
+}
+
+int
+sfc_rx_qstart(struct sfc_adapter *sa, unsigned int sw_index)
+{
+ struct sfc_rxq_info *rxq_info;
+ struct sfc_rxq *rxq;
+ struct sfc_evq *evq;
+ int rc;
+
+ sfc_log_init(sa, "sw_index=%u", sw_index);
+
+ SFC_ASSERT(sw_index < sa->rxq_count);
+
+ rxq_info = &sa->rxq_info[sw_index];
+ rxq = rxq_info->rxq;
+ SFC_ASSERT(rxq->state == SFC_RXQ_INITIALIZED);
+
+ evq = rxq->evq;
+
+ rc = sfc_ev_qstart(sa, evq->evq_index);
+ if (rc != 0)
+ goto fail_ev_qstart;
+
+ rc = efx_rx_qcreate(sa->nic, rxq->hw_index, 0, rxq_info->type,
+ &rxq->mem, rxq_info->entries,
+ 0 /* not used on EF10 */, evq->common,
+ &rxq->common);
+ if (rc != 0)
+ goto fail_rx_qcreate;
+
+ efx_rx_qenable(rxq->common);
+
+ rxq->pending = rxq->completed = rxq->added = rxq->pushed = 0;
+
+ rxq->state |= SFC_RXQ_STARTED;
+
+ sfc_rx_qrefill(rxq);
+
+ if (sw_index == 0) {
+ rc = efx_mac_filter_default_rxq_set(sa->nic, rxq->common,
+ B_FALSE);
+ if (rc != 0)
+ goto fail_mac_filter_default_rxq_set;
+ }
+
+ /* It seems to be used by DPDK for debug purposes only ('rte_ether') */
+ sa->eth_dev->data->rx_queue_state[sw_index] =
+ RTE_ETH_QUEUE_STATE_STARTED;
+
+ return 0;
+
+fail_mac_filter_default_rxq_set:
+ sfc_rx_qflush(sa, sw_index);
+
+fail_rx_qcreate:
+ sfc_ev_qstop(sa, evq->evq_index);
+
+fail_ev_qstart:
+ return rc;
+}
+
+void
+sfc_rx_qstop(struct sfc_adapter *sa, unsigned int sw_index)
+{
+ struct sfc_rxq_info *rxq_info;
+ struct sfc_rxq *rxq;
+
+ sfc_log_init(sa, "sw_index=%u", sw_index);
+
+ SFC_ASSERT(sw_index < sa->rxq_count);
+
+ rxq_info = &sa->rxq_info[sw_index];
+ rxq = rxq_info->rxq;
+ SFC_ASSERT(rxq->state & SFC_RXQ_STARTED);
+
+ /* It seems to be used by DPDK for debug purposes only ('rte_ether') */
+ sa->eth_dev->data->rx_queue_state[sw_index] =
+ RTE_ETH_QUEUE_STATE_STOPPED;
+
+ if (sw_index == 0)
+ efx_mac_filter_default_rxq_clear(sa->nic);
+
+ sfc_rx_qflush(sa, sw_index);
+
+ rxq->state = SFC_RXQ_INITIALIZED;
+
+ efx_rx_qdestroy(rxq->common);
+
+ sfc_ev_qstop(sa, rxq->evq->evq_index);
+}
+
+static int
+sfc_rx_qcheck_conf(struct sfc_adapter *sa,
+ const struct rte_eth_rxconf *rx_conf)
+{
+ int rc = 0;
+
+ if (rx_conf->rx_thresh.pthresh != 0 ||
+ rx_conf->rx_thresh.hthresh != 0 ||
+ rx_conf->rx_thresh.wthresh != 0) {
+ sfc_err(sa,
+ "RxQ prefetch/host/writeback thresholds are not supported");
+ rc = EINVAL;
+ }
+
+ if (rx_conf->rx_free_thresh != 0) {
+ sfc_err(sa, "RxQ free threshold is not supported");
+ rc = EINVAL;
+ }
+
+ if (rx_conf->rx_drop_en == 0) {
+ sfc_err(sa, "RxQ drop disable is not supported");
+ rc = EINVAL;
+ }
+
+ if (rx_conf->rx_deferred_start != 0) {
+ sfc_err(sa, "RxQ deferred start is not supported");
+ rc = EINVAL;
+ }
+
+ return rc;
+}
+
+static unsigned int
+sfc_rx_mbuf_data_alignment(struct rte_mempool *mb_pool)
+{
+ uint32_t data_off;
+ uint32_t order;
+
+ /* The mbuf object itself is always cache line aligned */
+ order = rte_bsf32(RTE_CACHE_LINE_SIZE);
+
+ /* Data offset from mbuf object start */
+ data_off = sizeof(struct rte_mbuf) + rte_pktmbuf_priv_size(mb_pool) +
+ RTE_PKTMBUF_HEADROOM;
+
+ order = MIN(order, rte_bsf32(data_off));
+
+ return 1u << (order - 1);
+}
+
+static uint16_t
+sfc_rx_mb_pool_buf_size(struct sfc_adapter *sa, struct rte_mempool *mb_pool)
+{
+ const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
+ const uint32_t nic_align_start = MAX(1, encp->enc_rx_buf_align_start);
+ const uint32_t nic_align_end = MAX(1, encp->enc_rx_buf_align_end);
+ uint16_t buf_size;
+ unsigned int buf_aligned;
+ unsigned int start_alignment;
+ unsigned int end_padding_alignment;
+
+ /* Below it is assumed that both alignments are power of 2 */
+ SFC_ASSERT(rte_is_power_of_2(nic_align_start));
+ SFC_ASSERT(rte_is_power_of_2(nic_align_end));
+
+ /*
+ * mbuf is always cache line aligned, double-check
+ * that it meets rx buffer start alignment requirements.
+ */
+
+ /* Start from mbuf pool data room size */
+ buf_size = rte_pktmbuf_data_room_size(mb_pool);
+
+ /* Remove headroom */
+ if (buf_size <= RTE_PKTMBUF_HEADROOM) {
+ sfc_err(sa,
+ "RxQ mbuf pool %s object data room size %u is smaller than headroom %u",
+ mb_pool->name, buf_size, RTE_PKTMBUF_HEADROOM);
+ return 0;
+ }
+ buf_size -= RTE_PKTMBUF_HEADROOM;
+
+ /* Calculate guaranteed data start alignment */
+ buf_aligned = sfc_rx_mbuf_data_alignment(mb_pool);
+
+ /* Reserve space for start alignment */
+ if (buf_aligned < nic_align_start) {
+ start_alignment = nic_align_start - buf_aligned;
+ if (buf_size <= start_alignment) {
+ sfc_err(sa,
+ "RxQ mbuf pool %s object data room size %u is insufficient for headroom %u and buffer start alignment %u required by NIC",
+ mb_pool->name,
+ rte_pktmbuf_data_room_size(mb_pool),
+ RTE_PKTMBUF_HEADROOM, start_alignment);
+ return 0;
+ }
+ buf_aligned = nic_align_start;
+ buf_size -= start_alignment;
+ } else {
+ start_alignment = 0;
+ }
+
+ /* Make sure that end padding does not write beyond the buffer */
+ if (buf_aligned < nic_align_end) {
+ /*
+ * Estimate space which can be lost. If guarnteed buffer
+ * size is odd, lost space is (nic_align_end - 1). More
+ * accurate formula is below.
+ */
+ end_padding_alignment = nic_align_end -
+ MIN(buf_aligned, 1u << (rte_bsf32(buf_size) - 1));
+ if (buf_size <= end_padding_alignment) {
+ sfc_err(sa,
+ "RxQ mbuf pool %s object data room size %u is insufficient for headroom %u, buffer start alignment %u and end padding alignment %u required by NIC",
+ mb_pool->name,
+ rte_pktmbuf_data_room_size(mb_pool),
+ RTE_PKTMBUF_HEADROOM, start_alignment,
+ end_padding_alignment);
+ return 0;
+ }
+ buf_size -= end_padding_alignment;
+ } else {
+ /*
+ * Start is aligned the same or better than end,
+ * just align length.
+ */
+ buf_size = P2ALIGN(buf_size, nic_align_end);
+ }
+
+ return buf_size;
+}
+
+int
+sfc_rx_qinit(struct sfc_adapter *sa, unsigned int sw_index,
+ uint16_t nb_rx_desc, unsigned int socket_id,
+ const struct rte_eth_rxconf *rx_conf,
+ struct rte_mempool *mb_pool)
+{
+ const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
+ int rc;
+ uint16_t buf_size;
+ struct sfc_rxq_info *rxq_info;
+ unsigned int evq_index;
+ struct sfc_evq *evq;
+ struct sfc_rxq *rxq;
+
+ rc = sfc_rx_qcheck_conf(sa, rx_conf);
+ if (rc != 0)
+ goto fail_bad_conf;
+
+ buf_size = sfc_rx_mb_pool_buf_size(sa, mb_pool);
+ if (buf_size == 0) {
+ sfc_err(sa, "RxQ %u mbuf pool object size is too small",
+ sw_index);
+ rc = EINVAL;
+ goto fail_bad_conf;
+ }
+
+ if ((buf_size < sa->port.pdu + encp->enc_rx_prefix_size) &&
+ !sa->eth_dev->data->dev_conf.rxmode.enable_scatter) {
+ sfc_err(sa, "Rx scatter is disabled and RxQ %u mbuf pool "
+ "object size is too small", sw_index);
+ sfc_err(sa, "RxQ %u calculated Rx buffer size is %u vs "
+ "PDU size %u plus Rx prefix %u bytes",
+ sw_index, buf_size, (unsigned int)sa->port.pdu,
+ encp->enc_rx_prefix_size);
+ rc = EINVAL;
+ goto fail_bad_conf;
+ }
+
+ SFC_ASSERT(sw_index < sa->rxq_count);
+ rxq_info = &sa->rxq_info[sw_index];
+
+ SFC_ASSERT(nb_rx_desc <= rxq_info->max_entries);
+ rxq_info->entries = nb_rx_desc;
+ rxq_info->type = EFX_RXQ_TYPE_DEFAULT;
+
+ evq_index = sfc_evq_index_by_rxq_sw_index(sa, sw_index);
+
+ rc = sfc_ev_qinit(sa, evq_index, rxq_info->entries, socket_id);
+ if (rc != 0)
+ goto fail_ev_qinit;
+
+ evq = sa->evq_info[evq_index].evq;
+
+ rc = ENOMEM;
+ rxq = rte_zmalloc_socket("sfc-rxq", sizeof(*rxq), RTE_CACHE_LINE_SIZE,
+ socket_id);
+ if (rxq == NULL)
+ goto fail_rxq_alloc;
+
+ rc = sfc_dma_alloc(sa, "rxq", sw_index, EFX_RXQ_SIZE(rxq_info->entries),
+ socket_id, &rxq->mem);
+ if (rc != 0)
+ goto fail_dma_alloc;
+
+ rc = ENOMEM;
+ rxq->sw_desc = rte_calloc_socket("sfc-rxq-sw_desc", rxq_info->entries,
+ sizeof(*rxq->sw_desc),
+ RTE_CACHE_LINE_SIZE, socket_id);
+ if (rxq->sw_desc == NULL)
+ goto fail_desc_alloc;
+
+ evq->rxq = rxq;
+ rxq->evq = evq;
+ rxq->ptr_mask = rxq_info->entries - 1;
+ rxq->refill_mb_pool = mb_pool;
+ rxq->buf_size = buf_size;
+ rxq->hw_index = sw_index;
+ rxq->port_id = sa->eth_dev->data->port_id;
+
+ rxq->state = SFC_RXQ_INITIALIZED;
+
+ rxq_info->rxq = rxq;
+
+ return 0;
+
+fail_desc_alloc:
+ sfc_dma_free(sa, &rxq->mem);
+
+fail_dma_alloc:
+ rte_free(rxq);
+
+fail_rxq_alloc:
+ sfc_ev_qfini(sa, evq_index);
+
+fail_ev_qinit:
+ rxq_info->entries = 0;
+
+fail_bad_conf:
+ sfc_log_init(sa, "failed %d", rc);
+ return rc;
+}
+
+void
+sfc_rx_qfini(struct sfc_adapter *sa, unsigned int sw_index)
+{
+ struct sfc_rxq_info *rxq_info;
+ struct sfc_rxq *rxq;
+
+ SFC_ASSERT(sw_index < sa->rxq_count);
+
+ rxq_info = &sa->rxq_info[sw_index];
+
+ rxq = rxq_info->rxq;
+ SFC_ASSERT(rxq->state == SFC_RXQ_INITIALIZED);
+
+ rxq_info->rxq = NULL;
+ rxq_info->entries = 0;
+
+ rte_free(rxq->sw_desc);
+ sfc_dma_free(sa, &rxq->mem);
+ rte_free(rxq);
+}
+
+int
+sfc_rx_start(struct sfc_adapter *sa)
+{
+ unsigned int sw_index;
+ int rc;
+
+ sfc_log_init(sa, "rxq_count=%u", sa->rxq_count);
+
+ rc = efx_rx_init(sa->nic);
+ if (rc != 0)
+ goto fail_rx_init;
+
+ for (sw_index = 0; sw_index < sa->rxq_count; ++sw_index) {
+ rc = sfc_rx_qstart(sa, sw_index);
+ if (rc != 0)
+ goto fail_rx_qstart;
+ }
+
+ return 0;
+
+fail_rx_qstart:
+ while (sw_index-- > 0)
+ sfc_rx_qstop(sa, sw_index);
+
+ efx_rx_fini(sa->nic);
+
+fail_rx_init:
+ sfc_log_init(sa, "failed %d", rc);
+ return rc;
+}
+
+void
+sfc_rx_stop(struct sfc_adapter *sa)
+{
+ unsigned int sw_index;
+
+ sfc_log_init(sa, "rxq_count=%u", sa->rxq_count);
+
+ sw_index = sa->rxq_count;
+ while (sw_index-- > 0) {
+ if (sa->rxq_info[sw_index].rxq != NULL)
+ sfc_rx_qstop(sa, sw_index);
+ }
+
+ efx_rx_fini(sa->nic);
+}
static int
sfc_rx_qinit_info(struct sfc_adapter *sa, unsigned int sw_index)
void
sfc_rx_fini(struct sfc_adapter *sa)
{
+ unsigned int sw_index;
+
+ sw_index = sa->rxq_count;
+ while (sw_index-- > 0) {
+ if (sa->rxq_info[sw_index].rxq != NULL)
+ sfc_rx_qfini(sa, sw_index);
+ }
+
rte_free(sa->rxq_info);
sa->rxq_info = NULL;
sa->rxq_count = 0;
git.droids-corp.org / dpdk.git / blobdiff