sq->head++;
sq->head &= (sq->sqe_cnt - 1);
}
+
+int cn10k_free_all_ipolicers(struct otx2_nic *pfvf)
+{
+ struct nix_bandprof_free_req *req;
+ int rc;
+
+ if (is_dev_otx2(pfvf->pdev))
+ return 0;
+
+ mutex_lock(&pfvf->mbox.lock);
+
+ req = otx2_mbox_alloc_msg_nix_bandprof_free(&pfvf->mbox);
+ if (!req) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ /* Free all bandwidth profiles allocated */
+ req->free_all = true;
+
+ rc = otx2_sync_mbox_msg(&pfvf->mbox);
+out:
+ mutex_unlock(&pfvf->mbox.lock);
+ return rc;
+}
+
+int cn10k_alloc_leaf_profile(struct otx2_nic *pfvf, u16 *leaf)
+{
+ struct nix_bandprof_alloc_req *req;
+ struct nix_bandprof_alloc_rsp *rsp;
+ int rc;
+
+ req = otx2_mbox_alloc_msg_nix_bandprof_alloc(&pfvf->mbox);
+ if (!req)
+ return -ENOMEM;
+
+ req->prof_count[BAND_PROF_LEAF_LAYER] = 1;
+
+ rc = otx2_sync_mbox_msg(&pfvf->mbox);
+ if (rc)
+ goto out;
+
+ rsp = (struct nix_bandprof_alloc_rsp *)
+ otx2_mbox_get_rsp(&pfvf->mbox.mbox, 0, &req->hdr);
+ if (!rsp->prof_count[BAND_PROF_LEAF_LAYER]) {
+ rc = -EIO;
+ goto out;
+ }
+
+ *leaf = rsp->prof_idx[BAND_PROF_LEAF_LAYER][0];
+out:
+ if (rc) {
+ dev_warn(pfvf->dev,
+ "Failed to allocate ingress bandwidth policer\n");
+ }
+
+ return rc;
+}
+
+int cn10k_alloc_matchall_ipolicer(struct otx2_nic *pfvf)
+{
+ struct otx2_hw *hw = &pfvf->hw;
+ int ret;
+
+ mutex_lock(&pfvf->mbox.lock);
+
+ ret = cn10k_alloc_leaf_profile(pfvf, &hw->matchall_ipolicer);
+
+ mutex_unlock(&pfvf->mbox.lock);
+
+ return ret;
+}
+
+#define POLICER_TIMESTAMP 1 /* 1 second */
+#define MAX_RATE_EXP 22 /* Valid rate exponent range: 0 - 22 */
+
+static void cn10k_get_ingress_burst_cfg(u32 burst, u32 *burst_exp,
+ u32 *burst_mantissa)
+{
+ int tmp;
+
+ /* Burst is calculated as
+ * (1+[BURST_MANTISSA]/256)*2^[BURST_EXPONENT]
+ * This is the upper limit on number tokens (bytes) that
+ * can be accumulated in the bucket.
+ */
+ *burst_exp = ilog2(burst);
+ if (burst < 256) {
+ /* No float: can't express mantissa in this case */
+ *burst_mantissa = 0;
+ return;
+ }
+
+ if (*burst_exp > MAX_RATE_EXP)
+ *burst_exp = MAX_RATE_EXP;
+
+ /* Calculate mantissa
+ * Find remaining bytes 'burst - 2^burst_exp'
+ * mantissa = (remaining bytes) / 2^ (burst_exp - 8)
+ */
+ tmp = burst - rounddown_pow_of_two(burst);
+ *burst_mantissa = tmp / (1UL << (*burst_exp - 8));
+}
+
+static void cn10k_get_ingress_rate_cfg(u64 rate, u32 *rate_exp,
+ u32 *rate_mantissa, u32 *rdiv)
+{
+ u32 div = 0;
+ u32 exp = 0;
+ u64 tmp;
+
+ /* Figure out mantissa, exponent and divider from given max pkt rate
+ *
+ * To achieve desired rate HW adds
+ * (1+[RATE_MANTISSA]/256)*2^[RATE_EXPONENT] tokens (bytes) at every
+ * policer timeunit * 2^rdiv ie 2 * 2^rdiv usecs, to the token bucket.
+ * Here policer timeunit is 2 usecs and rate is in bits per sec.
+ * Since floating point cannot be used below algorithm uses 1000000
+ * scale factor to support rates upto 100Gbps.
+ */
+ tmp = rate * 32 * 2;
+ if (tmp < 256000000) {
+ while (tmp < 256000000) {
+ tmp = tmp * 2;
+ div++;
+ }
+ } else {
+ for (exp = 0; tmp >= 512000000 && exp <= MAX_RATE_EXP; exp++)
+ tmp = tmp / 2;
+
+ if (exp > MAX_RATE_EXP)
+ exp = MAX_RATE_EXP;
+ }
+
+ *rate_mantissa = (tmp - 256000000) / 1000000;
+ *rate_exp = exp;
+ *rdiv = div;
+}
+
+int cn10k_map_unmap_rq_policer(struct otx2_nic *pfvf, int rq_idx,
+ u16 policer, bool map)
+{
+ struct nix_cn10k_aq_enq_req *aq;
+
+ aq = otx2_mbox_alloc_msg_nix_cn10k_aq_enq(&pfvf->mbox);
+ if (!aq)
+ return -ENOMEM;
+
+ /* Enable policing and set the bandwidth profile (policer) index */
+ if (map)
+ aq->rq.policer_ena = 1;
+ else
+ aq->rq.policer_ena = 0;
+ aq->rq_mask.policer_ena = 1;
+
+ aq->rq.band_prof_id = policer;
+ aq->rq_mask.band_prof_id = GENMASK(9, 0);
+
+ /* Fill AQ info */
+ aq->qidx = rq_idx;
+ aq->ctype = NIX_AQ_CTYPE_RQ;
+ aq->op = NIX_AQ_INSTOP_WRITE;
+
+ return otx2_sync_mbox_msg(&pfvf->mbox);
+}
+
+int cn10k_free_leaf_profile(struct otx2_nic *pfvf, u16 leaf)
+{
+ struct nix_bandprof_free_req *req;
+
+ req = otx2_mbox_alloc_msg_nix_bandprof_free(&pfvf->mbox);
+ if (!req)
+ return -ENOMEM;
+
+ req->prof_count[BAND_PROF_LEAF_LAYER] = 1;
+ req->prof_idx[BAND_PROF_LEAF_LAYER][0] = leaf;
+
+ return otx2_sync_mbox_msg(&pfvf->mbox);
+}
+
+int cn10k_free_matchall_ipolicer(struct otx2_nic *pfvf)
+{
+ struct otx2_hw *hw = &pfvf->hw;
+ int qidx, rc;
+
+ mutex_lock(&pfvf->mbox.lock);
+
+ /* Remove RQ's policer mapping */
+ for (qidx = 0; qidx < hw->rx_queues; qidx++)
+ cn10k_map_unmap_rq_policer(pfvf, qidx,
+ hw->matchall_ipolicer, false);
+
+ rc = cn10k_free_leaf_profile(pfvf, hw->matchall_ipolicer);
+
+ mutex_unlock(&pfvf->mbox.lock);
+ return rc;
+}
+
+int cn10k_set_ipolicer_rate(struct otx2_nic *pfvf, u16 profile,
+ u32 burst, u64 rate, bool pps)
+{
+ struct nix_cn10k_aq_enq_req *aq;
+ u32 burst_exp, burst_mantissa;
+ u32 rate_exp, rate_mantissa;
+ u32 rdiv;
+
+ /* Get exponent and mantissa values for the desired rate */
+ cn10k_get_ingress_burst_cfg(burst, &burst_exp, &burst_mantissa);
+ cn10k_get_ingress_rate_cfg(rate, &rate_exp, &rate_mantissa, &rdiv);
+
+ /* Init bandwidth profile */
+ aq = otx2_mbox_alloc_msg_nix_cn10k_aq_enq(&pfvf->mbox);
+ if (!aq)
+ return -ENOMEM;
+
+ /* Set initial color mode to blind */
+ aq->prof.icolor = 0x03;
+ aq->prof_mask.icolor = 0x03;
+
+ /* Set rate and burst values */
+ aq->prof.cir_exponent = rate_exp;
+ aq->prof_mask.cir_exponent = 0x1F;
+
+ aq->prof.cir_mantissa = rate_mantissa;
+ aq->prof_mask.cir_mantissa = 0xFF;
+
+ aq->prof.cbs_exponent = burst_exp;
+ aq->prof_mask.cbs_exponent = 0x1F;
+
+ aq->prof.cbs_mantissa = burst_mantissa;
+ aq->prof_mask.cbs_mantissa = 0xFF;
+
+ aq->prof.rdiv = rdiv;
+ aq->prof_mask.rdiv = 0xF;
+
+ if (pps) {
+ /* The amount of decremented tokens is calculated according to
+ * the following equation:
+ * max([ LMODE ? 0 : (packet_length - LXPTR)] +
+ * ([ADJUST_MANTISSA]/256 - 1) * 2^[ADJUST_EXPONENT],
+ * 1/256)
+ * if LMODE is 1 then rate limiting will be based on
+ * PPS otherwise bps.
+ * The aim of the ADJUST value is to specify a token cost per
+ * packet in contrary to the packet length that specifies a
+ * cost per byte. To rate limit based on PPS adjust mantissa
+ * is set as 384 and exponent as 1 so that number of tokens
+ * decremented becomes 1 i.e, 1 token per packeet.
+ */
+ aq->prof.adjust_exponent = 1;
+ aq->prof_mask.adjust_exponent = 0x1F;
+
+ aq->prof.adjust_mantissa = 384;
+ aq->prof_mask.adjust_mantissa = 0x1FF;
+
+ aq->prof.lmode = 0x1;
+ aq->prof_mask.lmode = 0x1;
+ }
+
+ /* Two rate three color marker
+ * With PEIR/EIR set to zero, color will be either green or red
+ */
+ aq->prof.meter_algo = 2;
+ aq->prof_mask.meter_algo = 0x3;
+
+ aq->prof.rc_action = NIX_RX_BAND_PROF_ACTIONRESULT_DROP;
+ aq->prof_mask.rc_action = 0x3;
+
+ aq->prof.yc_action = NIX_RX_BAND_PROF_ACTIONRESULT_PASS;
+ aq->prof_mask.yc_action = 0x3;
+
+ aq->prof.gc_action = NIX_RX_BAND_PROF_ACTIONRESULT_PASS;
+ aq->prof_mask.gc_action = 0x3;
+
+ /* Setting exponent value as 24 and mantissa as 0 configures
+ * the bucket with zero values making bucket unused. Peak
+ * information rate and Excess information rate buckets are
+ * unused here.
+ */
+ aq->prof.peir_exponent = 24;
+ aq->prof_mask.peir_exponent = 0x1F;
+
+ aq->prof.peir_mantissa = 0;
+ aq->prof_mask.peir_mantissa = 0xFF;
+
+ aq->prof.pebs_exponent = 24;
+ aq->prof_mask.pebs_exponent = 0x1F;
+
+ aq->prof.pebs_mantissa = 0;
+ aq->prof_mask.pebs_mantissa = 0xFF;
+
+ /* Fill AQ info */
+ aq->qidx = profile;
+ aq->ctype = NIX_AQ_CTYPE_BANDPROF;
+ aq->op = NIX_AQ_INSTOP_WRITE;
+
+ return otx2_sync_mbox_msg(&pfvf->mbox);
+}
+
+int cn10k_set_matchall_ipolicer_rate(struct otx2_nic *pfvf,
+ u32 burst, u64 rate)
+{
+ struct otx2_hw *hw = &pfvf->hw;
+ int qidx, rc;
+
+ mutex_lock(&pfvf->mbox.lock);
+
+ rc = cn10k_set_ipolicer_rate(pfvf, hw->matchall_ipolicer, burst,
+ rate, false);
+ if (rc)
+ goto out;
+
+ for (qidx = 0; qidx < hw->rx_queues; qidx++) {
+ rc = cn10k_map_unmap_rq_policer(pfvf, qidx,
+ hw->matchall_ipolicer, true);
+ if (rc)
+ break;
+ }
+
+out:
+ mutex_unlock(&pfvf->mbox.lock);
+ return rc;
+}
projects / linux-2.6-microblaze.git / blobdiff