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From cc230f5618174506889f98ac6b79e72ac9d9d9e4 Mon Sep 17 00:00:00 2001
From: Calvin Johnson <calvin.johnson@nxp.com>
Date: Wed, 15 Nov 2017 13:45:27 +0530
Subject: [PATCH] staging: fsl_ppfe/eth: add function to update tmu credits
__hif_lib_update_credit function is used to update the tmu credits.
If tx_qos is set, tmu credit is updated based on the number of packets
transmitted by tmu.
Signed-off-by: Calvin Johnson <calvin.johnson@nxp.com>
Signed-off-by: Anjaneyulu Jagarlmudi <anji.jagarlmudi@nxp.com>
---
drivers/staging/fsl_ppfe/pfe_hif_lib.c | 33 +++++++++++++++++++++++++++++++++
drivers/staging/fsl_ppfe/pfe_hif_lib.h | 1 +
2 files changed, 34 insertions(+)
--- a/drivers/staging/fsl_ppfe/pfe_hif_lib.c
+++ b/drivers/staging/fsl_ppfe/pfe_hif_lib.c
@@ -565,6 +565,39 @@ static void hif_lib_tmu_credit_init(stru
}
}
+/* __hif_lib_update_credit
+ *
+ * @param[in] client hif client context
+ * @param[in] queue queue number in match with TMU
+ */
+void __hif_lib_update_credit(struct hif_client_s *client, unsigned int queue)
+{
+ unsigned int tmu_tx_packets, tmp;
+
+ if (tx_qos) {
+ tmu_tx_packets = be32_to_cpu(pe_dmem_read(TMU0_ID +
+ client->id, TMU_DM_TX_TRANS, 4));
+
+ /* tx_packets counter overflowed */
+ if (tmu_tx_packets >
+ pfe->tmu_credit.tx_packets[client->id][queue]) {
+ tmp = UINT_MAX - tmu_tx_packets +
+ pfe->tmu_credit.tx_packets[client->id][queue];
+
+ pfe->tmu_credit.tx_credit[client->id][queue] =
+ pfe->tmu_credit.tx_credit_max[client->id][queue] - tmp;
+ } else {
+ /* TMU tx <= pfe_eth tx, normal case or both OF since
+ * last time
+ */
+ pfe->tmu_credit.tx_credit[client->id][queue] =
+ pfe->tmu_credit.tx_credit_max[client->id][queue] -
+ (pfe->tmu_credit.tx_packets[client->id][queue] -
+ tmu_tx_packets);
+ }
+ }
+}
+
int pfe_hif_lib_init(struct pfe *pfe)
{
int rc;
--- a/drivers/staging/fsl_ppfe/pfe_hif_lib.h
+++ b/drivers/staging/fsl_ppfe/pfe_hif_lib.h
@@ -185,6 +185,7 @@ void *hif_lib_tx_get_next_complete(struc
void *hif_lib_receive_pkt(struct hif_client_s *client, int qno, int *len, int
*ofst, unsigned int *rx_ctrl,
unsigned int *desc_ctrl, void **priv_data);
+void __hif_lib_update_credit(struct hif_client_s *client, unsigned int queue);
void hif_lib_set_rx_cpu_affinity(struct hif_client_s *client, int cpu_id);
void hif_lib_set_tx_queue_nocpy(struct hif_client_s *client, int qno, int
enable);
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