[dpdk-dev] [PATCH v2 04/27] common/octeontx2: add mailbox base support infra

[jerinj at marvell.com]

From: Jerin Jacob <jerinj at marvell.com>

This patch adds mailbox init and fini support.
Each RVU device has a dedicated 64KB mailbox region
shared with its peer for communication. RVU AF has
a separate mailbox region shared with each of RVU PFs
and an RVU PF has a separate region shared with
each of it's VF.

Signed-off-by: Jerin Jacob <jerinj at marvell.com>
Signed-off-by: Vamsi Attunuru <vattunuru at marvell.com>
Signed-off-by: Nithin Dabilpuram <ndabilpuram at marvell.com>
---
 drivers/common/octeontx2/otx2_mbox.c | 133 +++++++++++++++++++++++++++
 drivers/common/octeontx2/otx2_mbox.h |   5 +
 2 files changed, 138 insertions(+)

diff --git a/drivers/common/octeontx2/otx2_mbox.c b/drivers/common/octeontx2/otx2_mbox.c
index c9cdbdbbc..cb03f6503 100644
--- a/drivers/common/octeontx2/otx2_mbox.c
+++ b/drivers/common/octeontx2/otx2_mbox.c
@@ -2,4 +2,137 @@
  * Copyright(C) 2019 Marvell International Ltd.
  */
 
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <rte_atomic.h>
+#include <rte_cycles.h>
+
 #include "otx2_mbox.h"
+
+#define RVU_AF_AFPF_MBOX0	(0x02000)
+#define RVU_AF_AFPF_MBOX1	(0x02008)
+
+#define RVU_PF_PFAF_MBOX0	(0xC00)
+#define RVU_PF_PFAF_MBOX1	(0xC08)
+
+#define RVU_PF_VFX_PFVF_MBOX0	(0x0000)
+#define RVU_PF_VFX_PFVF_MBOX1	(0x0008)
+
+#define	RVU_VF_VFPF_MBOX0	(0x0000)
+#define	RVU_VF_VFPF_MBOX1	(0x0008)
+
+void
+otx2_mbox_fini(struct otx2_mbox *mbox)
+{
+	mbox->reg_base = 0;
+	mbox->hwbase = 0;
+	free(mbox->dev);
+	mbox->dev = NULL;
+}
+
+void
+otx2_mbox_reset(struct otx2_mbox *mbox, int devid)
+{
+	struct otx2_mbox_dev *mdev = &mbox->dev[devid];
+	struct mbox_hdr *tx_hdr =
+		(struct mbox_hdr *)((uintptr_t)mdev->mbase + mbox->tx_start);
+	struct mbox_hdr *rx_hdr =
+		(struct mbox_hdr *)((uintptr_t)mdev->mbase + mbox->rx_start);
+
+	rte_spinlock_lock(&mdev->mbox_lock);
+	mdev->msg_size = 0;
+	mdev->rsp_size = 0;
+	tx_hdr->msg_size = 0;
+	tx_hdr->num_msgs = 0;
+	rx_hdr->msg_size = 0;
+	rx_hdr->num_msgs = 0;
+	rte_spinlock_unlock(&mdev->mbox_lock);
+}
+
+int
+otx2_mbox_init(struct otx2_mbox *mbox, uintptr_t hwbase,
+	       uintptr_t reg_base, int direction, int ndevs)
+{
+	struct otx2_mbox_dev *mdev;
+	int devid;
+
+	mbox->reg_base = reg_base;
+	mbox->hwbase = hwbase;
+
+	switch (direction) {
+	case MBOX_DIR_AFPF:
+	case MBOX_DIR_PFVF:
+		mbox->tx_start = MBOX_DOWN_TX_START;
+		mbox->rx_start = MBOX_DOWN_RX_START;
+		mbox->tx_size  = MBOX_DOWN_TX_SIZE;
+		mbox->rx_size  = MBOX_DOWN_RX_SIZE;
+		break;
+	case MBOX_DIR_PFAF:
+	case MBOX_DIR_VFPF:
+		mbox->tx_start = MBOX_DOWN_RX_START;
+		mbox->rx_start = MBOX_DOWN_TX_START;
+		mbox->tx_size  = MBOX_DOWN_RX_SIZE;
+		mbox->rx_size  = MBOX_DOWN_TX_SIZE;
+		break;
+	case MBOX_DIR_AFPF_UP:
+	case MBOX_DIR_PFVF_UP:
+		mbox->tx_start = MBOX_UP_TX_START;
+		mbox->rx_start = MBOX_UP_RX_START;
+		mbox->tx_size  = MBOX_UP_TX_SIZE;
+		mbox->rx_size  = MBOX_UP_RX_SIZE;
+		break;
+	case MBOX_DIR_PFAF_UP:
+	case MBOX_DIR_VFPF_UP:
+		mbox->tx_start = MBOX_UP_RX_START;
+		mbox->rx_start = MBOX_UP_TX_START;
+		mbox->tx_size  = MBOX_UP_RX_SIZE;
+		mbox->rx_size  = MBOX_UP_TX_SIZE;
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	switch (direction) {
+	case MBOX_DIR_AFPF:
+	case MBOX_DIR_AFPF_UP:
+		mbox->trigger = RVU_AF_AFPF_MBOX0;
+		mbox->tr_shift = 4;
+		break;
+	case MBOX_DIR_PFAF:
+	case MBOX_DIR_PFAF_UP:
+		mbox->trigger = RVU_PF_PFAF_MBOX1;
+		mbox->tr_shift = 0;
+		break;
+	case MBOX_DIR_PFVF:
+	case MBOX_DIR_PFVF_UP:
+		mbox->trigger = RVU_PF_VFX_PFVF_MBOX0;
+		mbox->tr_shift = 12;
+		break;
+	case MBOX_DIR_VFPF:
+	case MBOX_DIR_VFPF_UP:
+		mbox->trigger = RVU_VF_VFPF_MBOX1;
+		mbox->tr_shift = 0;
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	mbox->dev = malloc(ndevs * sizeof(struct otx2_mbox_dev));
+	if (!mbox->dev) {
+		otx2_mbox_fini(mbox);
+		return -ENOMEM;
+	}
+	mbox->ndevs = ndevs;
+	for (devid = 0; devid < ndevs; devid++) {
+		mdev = &mbox->dev[devid];
+		mdev->mbase = (void *)(mbox->hwbase + (devid * MBOX_SIZE));
+		rte_spinlock_init(&mdev->mbox_lock);
+		/* Init header to reset value */
+		otx2_mbox_reset(mbox, devid);
+	}
+
+	return 0;
+}
diff --git a/drivers/common/octeontx2/otx2_mbox.h b/drivers/common/octeontx2/otx2_mbox.h
index e2d79c070..ac7de788f 100644
--- a/drivers/common/octeontx2/otx2_mbox.h
+++ b/drivers/common/octeontx2/otx2_mbox.h
@@ -1333,4 +1333,9 @@ struct tim_enable_rsp {
 	uint32_t __otx2_io currentbucket;
 };
 
+void otx2_mbox_reset(struct otx2_mbox *mbox, int devid);
+int otx2_mbox_init(struct otx2_mbox *mbox, uintptr_t hwbase,
+		   uintptr_t reg_base, int direction, int ndevs);
+void otx2_mbox_fini(struct otx2_mbox *mbox);
+
 #endif /* __OTX2_MBOX_H__ */
-- 
2.21.0