[dpdk-dev] [PATCH v2 5/7] net/bnxt: fix VF resource allocation

[Ajit Khaparde <ajit.khaparde@broadcom.com>]

If the resource requirement of a VF is more than what is allotted
to it by the FW, a VF can request to reallocate some of the resources.

This is possible only when the NIC is running the Resource Manager aware
CHiMP FW.

If necessary, calculate Tx and Rx ring count using the new RM API.
Otherwise use the Tx and Rx ring count as-is. Update the cp ring count
based on the Tx and Rx ring count.

Fixes: b7778e8a1c00 ("net/bnxt: refactor to properly allocate resources for PF/VF")

Signed-off-by: Jay Ding <jay.ding@broadcom.com>
Signed-off-by: Scott Branden <scott.branden@broadcom.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Randy Schacher <stuart.schacher@broadcom.com>
Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
---
 drivers/net/bnxt/bnxt.h        |  1 +
 drivers/net/bnxt/bnxt_ethdev.c | 25 +++++++++++---
 drivers/net/bnxt/bnxt_hwrm.c   | 75 +++++++++++++++++++++++++++++++++++++++++-
 drivers/net/bnxt/bnxt_hwrm.h   |  2 ++
 drivers/net/bnxt/bnxt_ring.h   |  1 +
 5 files changed, 98 insertions(+), 6 deletions(-)

diff --git a/drivers/net/bnxt/bnxt.h b/drivers/net/bnxt/bnxt.h
index a93fbf533..afaaf8c41 100644
--- a/drivers/net/bnxt/bnxt.h
+++ b/drivers/net/bnxt/bnxt.h
@@ -220,6 +220,7 @@ struct bnxt {
 #define BNXT_FLAG_UPDATE_HASH	(1 << 5)
 #define BNXT_FLAG_PTP_SUPPORTED	(1 << 6)
 #define BNXT_FLAG_MULTI_HOST    (1 << 7)
+#define BNXT_FLAG_NEW_RM	(1 << 30)
 #define BNXT_FLAG_INIT_DONE	(1 << 31)
 #define BNXT_PF(bp)		(!((bp)->flags & BNXT_FLAG_VF))
 #define BNXT_VF(bp)		((bp)->flags & BNXT_FLAG_VF)
diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 0aba9a3fc..62e02aa8a 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -406,9 +406,7 @@ static void bnxt_dev_info_get_op(struct rte_eth_dev *eth_dev,
 	/* PF/VF specifics */
 	if (BNXT_PF(bp))
 		dev_info->max_vfs = bp->pdev->max_vfs;
-	max_rx_rings = RTE_MIN(bp->max_vnics, RTE_MIN(bp->max_l2_ctx,
-						RTE_MIN(bp->max_rsscos_ctx,
-						bp->max_stat_ctx)));
+	max_rx_rings = RTE_MIN(bp->max_vnics, bp->max_stat_ctx);
 	/* For the sake of symmetry, max_rx_queues = max_tx_queues */
 	dev_info->max_rx_queues = max_rx_rings;
 	dev_info->max_tx_queues = max_rx_rings;
@@ -494,6 +492,25 @@ static int bnxt_dev_configure_op(struct rte_eth_dev *eth_dev)
 
 	bp->rx_queues = (void *)eth_dev->data->rx_queues;
 	bp->tx_queues = (void *)eth_dev->data->tx_queues;
+	bp->tx_nr_rings = eth_dev->data->nb_tx_queues;
+	bp->rx_nr_rings = eth_dev->data->nb_rx_queues;
+
+	if (BNXT_VF(bp) && (bp->flags & BNXT_FLAG_NEW_RM)) {
+		int rc;
+
+		rc = bnxt_hwrm_func_reserve_vf_resc(bp);
+		if (rc) {
+			PMD_DRV_LOG(ERR, "HWRM resource alloc fail:%x\n", rc);
+			return -ENOSPC;
+		}
+
+		/* legacy driver needs to get updated values */
+		rc = bnxt_hwrm_func_qcaps(bp);
+		if (rc) {
+			PMD_DRV_LOG(ERR, "hwrm func qcaps fail:%d\n", rc);
+			return -ENOSPC;
+		}
+	}
 
 	/* Inherit new configurations */
 	if (eth_dev->data->nb_rx_queues > bp->max_rx_rings ||
@@ -516,8 +533,6 @@ static int bnxt_dev_configure_op(struct rte_eth_dev *eth_dev)
 		return -ENOSPC;
 	}
 
-	bp->rx_nr_rings = eth_dev->data->nb_rx_queues;
-	bp->tx_nr_rings = eth_dev->data->nb_tx_queues;
 	bp->rx_cp_nr_rings = bp->rx_nr_rings;
 	bp->tx_cp_nr_rings = bp->tx_nr_rings;
 
diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index bf847a828..ba4ef1676 100644
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -27,6 +27,7 @@
 #include <rte_io.h>
 
 #define HWRM_CMD_TIMEOUT		10000
+#define HWRM_SPEC_CODE_1_8_3		0x10803
 #define HWRM_VERSION_1_9_1		0x10901
 
 struct bnxt_plcmodes_cfg {
@@ -483,7 +484,7 @@ static int bnxt_hwrm_ptp_qcfg(struct bnxt *bp)
 	return 0;
 }
 
-int bnxt_hwrm_func_qcaps(struct bnxt *bp)
+static int __bnxt_hwrm_func_qcaps(struct bnxt *bp)
 {
 	int rc = 0;
 	struct hwrm_func_qcaps_input req = {.req_type = 0 };
@@ -573,6 +574,20 @@ int bnxt_hwrm_func_qcaps(struct bnxt *bp)
 	return rc;
 }
 
+int bnxt_hwrm_func_qcaps(struct bnxt *bp)
+{
+	int rc;
+
+	rc = __bnxt_hwrm_func_qcaps(bp);
+	if (!rc && bp->hwrm_spec_code >= HWRM_SPEC_CODE_1_8_3) {
+		rc = bnxt_hwrm_func_resc_qcaps(bp);
+		if (!rc)
+			bp->flags |= BNXT_FLAG_NEW_RM;
+	}
+
+	return rc;
+}
+
 int bnxt_hwrm_func_reset(struct bnxt *bp)
 {
 	int rc = 0;
@@ -642,6 +657,64 @@ int bnxt_hwrm_func_driver_register(struct bnxt *bp)
 	return rc;
 }
 
+int bnxt_hwrm_func_reserve_vf_resc(struct bnxt *bp)
+{
+	int rc;
+	struct hwrm_func_vf_cfg_output *resp = bp->hwrm_cmd_resp_addr;
+	struct hwrm_func_vf_cfg_input req = {0};
+
+	HWRM_PREP(req, FUNC_VF_CFG);
+
+	req.enables = rte_cpu_to_le_32
+			(HWRM_FUNC_VF_CFG_INPUT_ENABLES_NUM_RX_RINGS  |
+			HWRM_FUNC_VF_CFG_INPUT_ENABLES_NUM_TX_RINGS   |
+			HWRM_FUNC_VF_CFG_INPUT_ENABLES_NUM_STAT_CTXS  |
+			HWRM_FUNC_VF_CFG_INPUT_ENABLES_NUM_CMPL_RINGS |
+			HWRM_FUNC_VF_CFG_INPUT_ENABLES_NUM_HW_RING_GRPS);
+
+	req.num_tx_rings = rte_cpu_to_le_16(bp->tx_nr_rings);
+	req.num_rx_rings = rte_cpu_to_le_16(bp->rx_nr_rings *
+					    AGG_RING_MULTIPLIER);
+	req.num_stat_ctxs = rte_cpu_to_le_16(bp->rx_nr_rings + bp->tx_nr_rings);
+	req.num_cmpl_rings = rte_cpu_to_le_16(bp->rx_nr_rings +
+					      bp->tx_nr_rings);
+	req.num_hw_ring_grps = rte_cpu_to_le_16(bp->rx_nr_rings);
+
+	rc = bnxt_hwrm_send_message(bp, &req, sizeof(req));
+
+	HWRM_CHECK_RESULT();
+	HWRM_UNLOCK();
+	return rc;
+}
+
+int bnxt_hwrm_func_resc_qcaps(struct bnxt *bp)
+{
+	int rc;
+	struct hwrm_func_resource_qcaps_output *resp = bp->hwrm_cmd_resp_addr;
+	struct hwrm_func_resource_qcaps_input req = {0};
+
+	HWRM_PREP(req, FUNC_RESOURCE_QCAPS);
+	req.fid = rte_cpu_to_le_16(0xffff);
+
+	rc = bnxt_hwrm_send_message(bp, &req, sizeof(req));
+
+	HWRM_CHECK_RESULT();
+
+	if (BNXT_VF(bp)) {
+		bp->max_rsscos_ctx = rte_le_to_cpu_16(resp->max_rsscos_ctx);
+		bp->max_cp_rings = rte_le_to_cpu_16(resp->max_cmpl_rings);
+		bp->max_tx_rings = rte_le_to_cpu_16(resp->max_tx_rings);
+		bp->max_rx_rings = rte_le_to_cpu_16(resp->max_rx_rings);
+		bp->max_ring_grps = rte_le_to_cpu_32(resp->max_hw_ring_grps);
+		bp->max_l2_ctx = rte_le_to_cpu_16(resp->max_l2_ctxs);
+		bp->max_vnics = rte_le_to_cpu_16(resp->max_vnics);
+		bp->max_stat_ctx = rte_le_to_cpu_16(resp->max_stat_ctx);
+	}
+
+	HWRM_UNLOCK();
+	return rc;
+}
+
 int bnxt_hwrm_ver_get(struct bnxt *bp)
 {
 	int rc = 0;
diff --git a/drivers/net/bnxt/bnxt_hwrm.h b/drivers/net/bnxt/bnxt_hwrm.h
index 4813c7fb6..60a4ab16a 100644
--- a/drivers/net/bnxt/bnxt_hwrm.h
+++ b/drivers/net/bnxt/bnxt_hwrm.h
@@ -111,6 +111,8 @@ int bnxt_alloc_hwrm_resources(struct bnxt *bp);
 int bnxt_get_hwrm_link_config(struct bnxt *bp, struct rte_eth_link *link);
 int bnxt_set_hwrm_link_config(struct bnxt *bp, bool link_up);
 int bnxt_hwrm_func_qcfg(struct bnxt *bp);
+int bnxt_hwrm_func_resc_qcaps(struct bnxt *bp);
+int bnxt_hwrm_func_reserve_vf_resc(struct bnxt *bp);
 int bnxt_hwrm_allocate_pf_only(struct bnxt *bp);
 int bnxt_hwrm_allocate_vfs(struct bnxt *bp, int num_vfs);
 int bnxt_hwrm_func_vf_mac(struct bnxt *bp, uint16_t vf,
diff --git a/drivers/net/bnxt/bnxt_ring.h b/drivers/net/bnxt/bnxt_ring.h
index 6c86259e8..65bf3e2f5 100644
--- a/drivers/net/bnxt/bnxt_ring.h
+++ b/drivers/net/bnxt/bnxt_ring.h
@@ -28,6 +28,7 @@
 
 #define BNXT_TPA_MAX		64
 #define AGG_RING_SIZE_FACTOR	2
+#define AGG_RING_MULTIPLIER	2
 
 /* These assume 4k pages */
 #define MAX_RX_DESC_CNT (8 * 1024)
-- 
2.15.1 (Apple Git-101)