net/cnxk: enable PTP processing in vector Rx
authorPavan Nikhilesh <pbhagavatula@marvell.com>
Tue, 29 Jun 2021 07:44:19 +0000 (13:14 +0530)
committerJerin Jacob <jerinj@marvell.com>
Wed, 30 Jun 2021 02:55:34 +0000 (04:55 +0200)
Enable PTP offload in vector Rx burst function, use vector path
for processing mbufs and finally switch to scalar when extracting
timestamp.

Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
Acked-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
drivers/net/cnxk/cn10k_ethdev.c
drivers/net/cnxk/cn10k_rx.c
drivers/net/cnxk/cn10k_rx.h
drivers/net/cnxk/cn10k_rx_vec.c
drivers/net/cnxk/cn9k_ethdev.c
drivers/net/cnxk/cn9k_rx.c
drivers/net/cnxk/cn9k_rx.h
drivers/net/cnxk/cn9k_rx_vec.c
drivers/net/cnxk/cnxk_ethdev.h

index b079edb..7caec6c 100644 (file)
@@ -301,7 +301,6 @@ nix_ptp_enable_vf(struct rte_eth_dev *eth_dev)
        if (nix_recalc_mtu(eth_dev))
                plt_err("Failed to set MTU size for ptp");
 
-       dev->scalar_ena = true;
        dev->rx_offload_flags |= NIX_RX_OFFLOAD_TSTAMP_F;
 
        /* Setting up the function pointers as per new offload flags */
index 3a9fd71..69e767a 100644 (file)
@@ -75,10 +75,7 @@ cn10k_eth_set_rx_function(struct rte_eth_dev *eth_dev)
                dev->rx_pkt_burst_no_offload =
                        nix_eth_rx_burst_mseg[0][0][0][0][0][0];
 
-       /* For PTP enabled, scalar rx function should be chosen as most of the
-        * PTP apps are implemented to rx burst 1 pkt.
-        */
-       if (dev->scalar_ena || dev->rx_offloads & DEV_RX_OFFLOAD_TIMESTAMP) {
+       if (dev->scalar_ena) {
                if (dev->rx_offloads & DEV_RX_OFFLOAD_SCATTER)
                        return pick_rx_func(eth_dev, nix_eth_rx_burst_mseg);
                return pick_rx_func(eth_dev, nix_eth_rx_burst);
index 5926ff7..d9572b1 100644 (file)
@@ -109,7 +109,7 @@ nix_update_match_id(const uint16_t match_id, uint64_t ol_flags,
 
 static __rte_always_inline void
 nix_cqe_xtract_mseg(const union nix_rx_parse_u *rx, struct rte_mbuf *mbuf,
-                   uint64_t rearm)
+                   uint64_t rearm, const uint16_t flags)
 {
        const rte_iova_t *iova_list;
        struct rte_mbuf *head;
@@ -125,8 +125,10 @@ nix_cqe_xtract_mseg(const union nix_rx_parse_u *rx, struct rte_mbuf *mbuf,
                return;
        }
 
-       mbuf->pkt_len = rx->pkt_lenm1 + 1;
-       mbuf->data_len = sg & 0xFFFF;
+       mbuf->pkt_len = (rx->pkt_lenm1 + 1) - (flags & NIX_RX_OFFLOAD_TSTAMP_F ?
+                                              CNXK_NIX_TIMESYNC_RX_OFFSET : 0);
+       mbuf->data_len = (sg & 0xFFFF) - (flags & NIX_RX_OFFLOAD_TSTAMP_F ?
+                                         CNXK_NIX_TIMESYNC_RX_OFFSET : 0);
        mbuf->nb_segs = nb_segs;
        sg = sg >> 16;
 
@@ -207,7 +209,7 @@ cn10k_nix_cqe_to_mbuf(const struct nix_cqe_hdr_s *cq, const uint32_t tag,
        *(uint64_t *)(&mbuf->rearm_data) = val;
 
        if (flag & NIX_RX_MULTI_SEG_F)
-               nix_cqe_xtract_mseg(rx, mbuf, val);
+               nix_cqe_xtract_mseg(rx, mbuf, val, flag);
        else
                mbuf->next = NULL;
 }
@@ -272,8 +274,9 @@ cn10k_nix_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts,
                                      flags);
                cnxk_nix_mbuf_to_tstamp(mbuf, rxq->tstamp,
                                        (flags & NIX_RX_OFFLOAD_TSTAMP_F),
-                                       (uint64_t *)((uint8_t *)mbuf + data_off)
-                                       );
+                                       (flags & NIX_RX_MULTI_SEG_F),
+                                       (uint64_t *)((uint8_t *)mbuf
+                                                               + data_off));
                rx_pkts[packets++] = mbuf;
                roc_prefetch_store_keep(mbuf);
                head++;
@@ -469,6 +472,99 @@ cn10k_nix_recv_pkts_vector(void *rx_queue, struct rte_mbuf **rx_pkts,
                                mbuf3);
                }
 
+               if (flags & NIX_RX_OFFLOAD_TSTAMP_F) {
+                       const uint16x8_t len_off = {
+                               0,                           /* ptype   0:15 */
+                               0,                           /* ptype  16:32 */
+                               CNXK_NIX_TIMESYNC_RX_OFFSET, /* pktlen  0:15*/
+                               0,                           /* pktlen 16:32 */
+                               CNXK_NIX_TIMESYNC_RX_OFFSET, /* datalen 0:15 */
+                               0,
+                               0,
+                               0};
+                       const uint32x4_t ptype = {RTE_PTYPE_L2_ETHER_TIMESYNC,
+                                                 RTE_PTYPE_L2_ETHER_TIMESYNC,
+                                                 RTE_PTYPE_L2_ETHER_TIMESYNC,
+                                                 RTE_PTYPE_L2_ETHER_TIMESYNC};
+                       const uint64_t ts_olf = PKT_RX_IEEE1588_PTP |
+                                               PKT_RX_IEEE1588_TMST |
+                                               rxq->tstamp->rx_tstamp_dynflag;
+                       const uint32x4_t and_mask = {0x1, 0x2, 0x4, 0x8};
+                       uint64x2_t ts01, ts23, mask;
+                       uint64_t ts[4];
+                       uint8_t res;
+
+                       /* Subtract timesync length from total pkt length. */
+                       f0 = vsubq_u16(f0, len_off);
+                       f1 = vsubq_u16(f1, len_off);
+                       f2 = vsubq_u16(f2, len_off);
+                       f3 = vsubq_u16(f3, len_off);
+
+                       /* Get the address of actual timestamp. */
+                       ts01 = vaddq_u64(mbuf01, data_off);
+                       ts23 = vaddq_u64(mbuf23, data_off);
+                       /* Load timestamp from address. */
+                       ts01 = vsetq_lane_u64(*(uint64_t *)vgetq_lane_u64(ts01,
+                                                                         0),
+                                             ts01, 0);
+                       ts01 = vsetq_lane_u64(*(uint64_t *)vgetq_lane_u64(ts01,
+                                                                         1),
+                                             ts01, 1);
+                       ts23 = vsetq_lane_u64(*(uint64_t *)vgetq_lane_u64(ts23,
+                                                                         0),
+                                             ts23, 0);
+                       ts23 = vsetq_lane_u64(*(uint64_t *)vgetq_lane_u64(ts23,
+                                                                         1),
+                                             ts23, 1);
+                       /* Convert from be to cpu byteorder. */
+                       ts01 = vrev64q_u8(ts01);
+                       ts23 = vrev64q_u8(ts23);
+                       /* Store timestamp into scalar for later use. */
+                       ts[0] = vgetq_lane_u64(ts01, 0);
+                       ts[1] = vgetq_lane_u64(ts01, 1);
+                       ts[2] = vgetq_lane_u64(ts23, 0);
+                       ts[3] = vgetq_lane_u64(ts23, 1);
+
+                       /* Store timestamp into dynfield. */
+                       *cnxk_nix_timestamp_dynfield(mbuf0, rxq->tstamp) =
+                               ts[0];
+                       *cnxk_nix_timestamp_dynfield(mbuf1, rxq->tstamp) =
+                               ts[1];
+                       *cnxk_nix_timestamp_dynfield(mbuf2, rxq->tstamp) =
+                               ts[2];
+                       *cnxk_nix_timestamp_dynfield(mbuf3, rxq->tstamp) =
+                               ts[3];
+
+                       /* Generate ptype mask to filter L2 ether timesync */
+                       mask = vdupq_n_u32(vgetq_lane_u32(f0, 0));
+                       mask = vsetq_lane_u32(vgetq_lane_u32(f1, 0), mask, 1);
+                       mask = vsetq_lane_u32(vgetq_lane_u32(f2, 0), mask, 2);
+                       mask = vsetq_lane_u32(vgetq_lane_u32(f3, 0), mask, 3);
+
+                       /* Match against L2 ether timesync. */
+                       mask = vceqq_u32(mask, ptype);
+                       /* Convert from vector from scalar mask */
+                       res = vaddvq_u32(vandq_u32(mask, and_mask));
+                       res &= 0xF;
+
+                       if (res) {
+                               /* Fill in the ol_flags for any packets that
+                                * matched.
+                                */
+                               ol_flags0 |= ((res & 0x1) ? ts_olf : 0);
+                               ol_flags1 |= ((res & 0x2) ? ts_olf : 0);
+                               ol_flags2 |= ((res & 0x4) ? ts_olf : 0);
+                               ol_flags3 |= ((res & 0x8) ? ts_olf : 0);
+
+                               /* Update Rxq timestamp with the latest
+                                * timestamp.
+                                */
+                               rxq->tstamp->rx_ready = 1;
+                               rxq->tstamp->rx_tstamp =
+                                       ts[31 - __builtin_clz(res)];
+                       }
+               }
+
                /* Form rearm_data with ol_flags */
                rearm0 = vsetq_lane_u64(ol_flags0, rearm0, 1);
                rearm1 = vsetq_lane_u64(ol_flags1, rearm1, 1);
@@ -496,17 +592,17 @@ cn10k_nix_recv_pkts_vector(void *rx_queue, struct rte_mbuf **rx_pkts,
                         * individual mbufs in scalar mode.
                         */
                        nix_cqe_xtract_mseg((union nix_rx_parse_u *)
-                                           (cq0 + CQE_SZ(0) + 8), mbuf0,
-                                           mbuf_initializer);
+                                               (cq0 + CQE_SZ(0) + 8), mbuf0,
+                                           mbuf_initializer, flags);
                        nix_cqe_xtract_mseg((union nix_rx_parse_u *)
-                                           (cq0 + CQE_SZ(1) + 8), mbuf1,
-                                           mbuf_initializer);
+                                               (cq0 + CQE_SZ(1) + 8), mbuf1,
+                                           mbuf_initializer, flags);
                        nix_cqe_xtract_mseg((union nix_rx_parse_u *)
-                                           (cq0 + CQE_SZ(2) + 8), mbuf2,
-                                           mbuf_initializer);
+                                               (cq0 + CQE_SZ(2) + 8), mbuf2,
+                                           mbuf_initializer, flags);
                        nix_cqe_xtract_mseg((union nix_rx_parse_u *)
-                                           (cq0 + CQE_SZ(3) + 8), mbuf3,
-                                           mbuf_initializer);
+                                               (cq0 + CQE_SZ(3) + 8), mbuf3,
+                                           mbuf_initializer, flags);
                } else {
                        /* Update that no more segments */
                        mbuf0->next = NULL;
index 65ffa97..93528a4 100644 (file)
@@ -11,9 +11,6 @@
                                               struct rte_mbuf **rx_pkts,      \
                                               uint16_t pkts)                  \
        {                                                                      \
-               /* TSTMP is not supported by vector */                         \
-               if ((flags) & NIX_RX_OFFLOAD_TSTAMP_F)                         \
-                       return 0;                                              \
                return cn10k_nix_recv_pkts_vector(rx_queue, rx_pkts, pkts,     \
                                                  (flags));                    \
        }
index 994fdb7..115e678 100644 (file)
@@ -309,7 +309,6 @@ nix_ptp_enable_vf(struct rte_eth_dev *eth_dev)
        if (nix_recalc_mtu(eth_dev))
                plt_err("Failed to set MTU size for ptp");
 
-       dev->scalar_ena = true;
        dev->rx_offload_flags |= NIX_RX_OFFLOAD_TSTAMP_F;
 
        /* Setting up the function pointers as per new offload flags */
index d293d4e..7d9f1bd 100644 (file)
@@ -75,10 +75,7 @@ cn9k_eth_set_rx_function(struct rte_eth_dev *eth_dev)
                dev->rx_pkt_burst_no_offload =
                        nix_eth_rx_burst_mseg[0][0][0][0][0][0];
 
-       /* For PTP enabled, scalar rx function should be chosen as most of the
-        * PTP apps are implemented to rx burst 1 pkt.
-        */
-       if (dev->scalar_ena || dev->rx_offloads & DEV_RX_OFFLOAD_TIMESTAMP) {
+       if (dev->scalar_ena) {
                if (dev->rx_offloads & DEV_RX_OFFLOAD_SCATTER)
                        return pick_rx_func(eth_dev, nix_eth_rx_burst_mseg);
                return pick_rx_func(eth_dev, nix_eth_rx_burst);
index 5ae9e81..beb52f3 100644 (file)
@@ -110,7 +110,7 @@ nix_update_match_id(const uint16_t match_id, uint64_t ol_flags,
 
 static __rte_always_inline void
 nix_cqe_xtract_mseg(const union nix_rx_parse_u *rx, struct rte_mbuf *mbuf,
-                   uint64_t rearm)
+                   uint64_t rearm, const uint16_t flags)
 {
        const rte_iova_t *iova_list;
        struct rte_mbuf *head;
@@ -126,8 +126,10 @@ nix_cqe_xtract_mseg(const union nix_rx_parse_u *rx, struct rte_mbuf *mbuf,
                return;
        }
 
-       mbuf->pkt_len = rx->pkt_lenm1 + 1;
-       mbuf->data_len = sg & 0xFFFF;
+       mbuf->pkt_len = (rx->pkt_lenm1 + 1) - (flags & NIX_RX_OFFLOAD_TSTAMP_F ?
+                                              CNXK_NIX_TIMESYNC_RX_OFFSET : 0);
+       mbuf->data_len = (sg & 0xFFFF) - (flags & NIX_RX_OFFLOAD_TSTAMP_F ?
+                                         CNXK_NIX_TIMESYNC_RX_OFFSET : 0);
        mbuf->nb_segs = nb_segs;
        sg = sg >> 16;
 
@@ -210,7 +212,7 @@ cn9k_nix_cqe_to_mbuf(const struct nix_cqe_hdr_s *cq, const uint32_t tag,
        *(uint64_t *)(&mbuf->rearm_data) = val;
 
        if (flag & NIX_RX_MULTI_SEG_F)
-               nix_cqe_xtract_mseg(rx, mbuf, val);
+               nix_cqe_xtract_mseg(rx, mbuf, val, flag);
        else
                mbuf->next = NULL;
 }
@@ -275,8 +277,9 @@ cn9k_nix_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts,
                                     flags);
                cnxk_nix_mbuf_to_tstamp(mbuf, rxq->tstamp,
                                        (flags & NIX_RX_OFFLOAD_TSTAMP_F),
-                                       (uint64_t *)((uint8_t *)mbuf + data_off)
-                                       );
+                                       (flags & NIX_RX_MULTI_SEG_F),
+                                       (uint64_t *)((uint8_t *)mbuf
+                                                               + data_off));
                rx_pkts[packets++] = mbuf;
                roc_prefetch_store_keep(mbuf);
                head++;
@@ -472,6 +475,99 @@ cn9k_nix_recv_pkts_vector(void *rx_queue, struct rte_mbuf **rx_pkts,
                                mbuf3);
                }
 
+               if (flags & NIX_RX_OFFLOAD_TSTAMP_F) {
+                       const uint16x8_t len_off = {
+                               0,                           /* ptype   0:15 */
+                               0,                           /* ptype  16:32 */
+                               CNXK_NIX_TIMESYNC_RX_OFFSET, /* pktlen  0:15*/
+                               0,                           /* pktlen 16:32 */
+                               CNXK_NIX_TIMESYNC_RX_OFFSET, /* datalen 0:15 */
+                               0,
+                               0,
+                               0};
+                       const uint32x4_t ptype = {RTE_PTYPE_L2_ETHER_TIMESYNC,
+                                                 RTE_PTYPE_L2_ETHER_TIMESYNC,
+                                                 RTE_PTYPE_L2_ETHER_TIMESYNC,
+                                                 RTE_PTYPE_L2_ETHER_TIMESYNC};
+                       const uint64_t ts_olf = PKT_RX_IEEE1588_PTP |
+                                               PKT_RX_IEEE1588_TMST |
+                                               rxq->tstamp->rx_tstamp_dynflag;
+                       const uint32x4_t and_mask = {0x1, 0x2, 0x4, 0x8};
+                       uint64x2_t ts01, ts23, mask;
+                       uint64_t ts[4];
+                       uint8_t res;
+
+                       /* Subtract timesync length from total pkt length. */
+                       f0 = vsubq_u16(f0, len_off);
+                       f1 = vsubq_u16(f1, len_off);
+                       f2 = vsubq_u16(f2, len_off);
+                       f3 = vsubq_u16(f3, len_off);
+
+                       /* Get the address of actual timestamp. */
+                       ts01 = vaddq_u64(mbuf01, data_off);
+                       ts23 = vaddq_u64(mbuf23, data_off);
+                       /* Load timestamp from address. */
+                       ts01 = vsetq_lane_u64(*(uint64_t *)vgetq_lane_u64(ts01,
+                                                                         0),
+                                             ts01, 0);
+                       ts01 = vsetq_lane_u64(*(uint64_t *)vgetq_lane_u64(ts01,
+                                                                         1),
+                                             ts01, 1);
+                       ts23 = vsetq_lane_u64(*(uint64_t *)vgetq_lane_u64(ts23,
+                                                                         0),
+                                             ts23, 0);
+                       ts23 = vsetq_lane_u64(*(uint64_t *)vgetq_lane_u64(ts23,
+                                                                         1),
+                                             ts23, 1);
+                       /* Convert from be to cpu byteorder. */
+                       ts01 = vrev64q_u8(ts01);
+                       ts23 = vrev64q_u8(ts23);
+                       /* Store timestamp into scalar for later use. */
+                       ts[0] = vgetq_lane_u64(ts01, 0);
+                       ts[1] = vgetq_lane_u64(ts01, 1);
+                       ts[2] = vgetq_lane_u64(ts23, 0);
+                       ts[3] = vgetq_lane_u64(ts23, 1);
+
+                       /* Store timestamp into dynfield. */
+                       *cnxk_nix_timestamp_dynfield(mbuf0, rxq->tstamp) =
+                               ts[0];
+                       *cnxk_nix_timestamp_dynfield(mbuf1, rxq->tstamp) =
+                               ts[1];
+                       *cnxk_nix_timestamp_dynfield(mbuf2, rxq->tstamp) =
+                               ts[2];
+                       *cnxk_nix_timestamp_dynfield(mbuf3, rxq->tstamp) =
+                               ts[3];
+
+                       /* Generate ptype mask to filter L2 ether timesync */
+                       mask = vdupq_n_u32(vgetq_lane_u32(f0, 0));
+                       mask = vsetq_lane_u32(vgetq_lane_u32(f1, 0), mask, 1);
+                       mask = vsetq_lane_u32(vgetq_lane_u32(f2, 0), mask, 2);
+                       mask = vsetq_lane_u32(vgetq_lane_u32(f3, 0), mask, 3);
+
+                       /* Match against L2 ether timesync. */
+                       mask = vceqq_u32(mask, ptype);
+                       /* Convert from vector from scalar mask */
+                       res = vaddvq_u32(vandq_u32(mask, and_mask));
+                       res &= 0xF;
+
+                       if (res) {
+                               /* Fill in the ol_flags for any packets that
+                                * matched.
+                                */
+                               ol_flags0 |= ((res & 0x1) ? ts_olf : 0);
+                               ol_flags1 |= ((res & 0x2) ? ts_olf : 0);
+                               ol_flags2 |= ((res & 0x4) ? ts_olf : 0);
+                               ol_flags3 |= ((res & 0x8) ? ts_olf : 0);
+
+                               /* Update Rxq timestamp with the latest
+                                * timestamp.
+                                */
+                               rxq->tstamp->rx_ready = 1;
+                               rxq->tstamp->rx_tstamp =
+                                       ts[31 - __builtin_clz(res)];
+                       }
+               }
+
                /* Form rearm_data with ol_flags */
                rearm0 = vsetq_lane_u64(ol_flags0, rearm0, 1);
                rearm1 = vsetq_lane_u64(ol_flags1, rearm1, 1);
@@ -499,17 +595,17 @@ cn9k_nix_recv_pkts_vector(void *rx_queue, struct rte_mbuf **rx_pkts,
                         * individual mbufs in scalar mode.
                         */
                        nix_cqe_xtract_mseg((union nix_rx_parse_u *)
-                                           (cq0 + CQE_SZ(0) + 8), mbuf0,
-                                           mbuf_initializer);
+                                               (cq0 + CQE_SZ(0) + 8), mbuf0,
+                                           mbuf_initializer, flags);
                        nix_cqe_xtract_mseg((union nix_rx_parse_u *)
-                                           (cq0 + CQE_SZ(1) + 8), mbuf1,
-                                           mbuf_initializer);
+                                               (cq0 + CQE_SZ(1) + 8), mbuf1,
+                                           mbuf_initializer, flags);
                        nix_cqe_xtract_mseg((union nix_rx_parse_u *)
-                                           (cq0 + CQE_SZ(2) + 8), mbuf2,
-                                           mbuf_initializer);
+                                               (cq0 + CQE_SZ(2) + 8), mbuf2,
+                                           mbuf_initializer, flags);
                        nix_cqe_xtract_mseg((union nix_rx_parse_u *)
-                                           (cq0 + CQE_SZ(3) + 8), mbuf3,
-                                           mbuf_initializer);
+                                               (cq0 + CQE_SZ(3) + 8), mbuf3,
+                                           mbuf_initializer, flags);
                } else {
                        /* Update that no more segments */
                        mbuf0->next = NULL;
index e61c222..ef5f771 100644 (file)
@@ -9,9 +9,6 @@
        uint16_t __rte_noinline __rte_hot cn9k_nix_recv_pkts_vec_##name(       \
                void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts)      \
        {                                                                      \
-               /* TSTMP is not supported by vector */                         \
-               if ((flags) & NIX_RX_OFFLOAD_TSTAMP_F)                         \
-                       return 0;                                              \
                return cn9k_nix_recv_pkts_vector(rx_queue, rx_pkts, pkts,      \
                                                 (flags));                     \
        }
index 67b1f42..4eead03 100644 (file)
@@ -136,13 +136,12 @@ struct cnxk_eth_qconf {
 };
 
 struct cnxk_timesync_info {
+       uint8_t rx_ready;
+       uint64_t rx_tstamp;
        uint64_t rx_tstamp_dynflag;
+       int tstamp_dynfield_offset;
        rte_iova_t tx_tstamp_iova;
        uint64_t *tx_tstamp;
-       uint64_t rx_tstamp;
-       int tstamp_dynfield_offset;
-       uint8_t tx_ready;
-       uint8_t rx_ready;
 } __plt_cache_aligned;
 
 struct cnxk_eth_dev {
@@ -465,13 +464,15 @@ cnxk_nix_timestamp_dynfield(struct rte_mbuf *mbuf,
 
 static __rte_always_inline void
 cnxk_nix_mbuf_to_tstamp(struct rte_mbuf *mbuf,
-                       struct cnxk_timesync_info *tstamp, bool ts_enable,
+                       struct cnxk_timesync_info *tstamp,
+                       const uint8_t ts_enable, const uint8_t mseg_enable,
                        uint64_t *tstamp_ptr)
 {
-       if (ts_enable &&
-           (mbuf->data_off ==
-            RTE_PKTMBUF_HEADROOM + CNXK_NIX_TIMESYNC_RX_OFFSET)) {
-               mbuf->pkt_len -= CNXK_NIX_TIMESYNC_RX_OFFSET;
+       if (ts_enable) {
+               if (!mseg_enable) {
+                       mbuf->pkt_len -= CNXK_NIX_TIMESYNC_RX_OFFSET;
+                       mbuf->data_len -= CNXK_NIX_TIMESYNC_RX_OFFSET;
+               }
 
                /* Reading the rx timestamp inserted by CGX, viz at
                 * starting of the packet data.