Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 376 insertions, 0 deletions

diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_mailbox.c b/drivers/net/ethernet/cavium/liquidio/octeon_mailbox.c
new file mode 100644
index 000000000..021d99cd1
--- /dev/null
+++ b/drivers/net/ethernet/cavium/liquidio/octeon_mailbox.c
@@ -0,0 +1,376 @@
+/**********************************************************************
+ * Author: Cavium, Inc.
+ *
+ * Contact: support@cavium.com
+ *          Please include "LiquidIO" in the subject.
+ *
+ * Copyright (c) 2003-2016 Cavium, Inc.
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, Version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This file is distributed in the hope that it will be useful, but
+ * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
+ * NONINFRINGEMENT.  See the GNU General Public License for more details.
+ ***********************************************************************/
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include "liquidio_common.h"
+#include "octeon_droq.h"
+#include "octeon_iq.h"
+#include "response_manager.h"
+#include "octeon_device.h"
+#include "octeon_main.h"
+#include "octeon_mailbox.h"
+#include "cn23xx_pf_device.h"
+
+/**
+ * octeon_mbox_read:
+ * @oct: Pointer mailbox
+ *
+ * Reads the 8-bytes of data from the mbox register
+ * Writes back the acknowldgement inidcating completion of read
+ */
+int octeon_mbox_read(struct octeon_mbox *mbox)
+{
+	union octeon_mbox_message msg;
+	int ret = 0;
+
+	spin_lock(&mbox->lock);
+
+	msg.u64 = readq(mbox->mbox_read_reg);
+
+	if ((msg.u64 == OCTEON_PFVFACK) || (msg.u64 == OCTEON_PFVFSIG)) {
+		spin_unlock(&mbox->lock);
+		return 0;
+	}
+
+	if (mbox->state & OCTEON_MBOX_STATE_REQUEST_RECEIVING) {
+		mbox->mbox_req.data[mbox->mbox_req.recv_len - 1] = msg.u64;
+		mbox->mbox_req.recv_len++;
+	} else {
+		if (mbox->state & OCTEON_MBOX_STATE_RESPONSE_RECEIVING) {
+			mbox->mbox_resp.data[mbox->mbox_resp.recv_len - 1] =
+				msg.u64;
+			mbox->mbox_resp.recv_len++;
+		} else {
+			if ((mbox->state & OCTEON_MBOX_STATE_IDLE) &&
+			    (msg.s.type == OCTEON_MBOX_REQUEST)) {
+				mbox->state &= ~OCTEON_MBOX_STATE_IDLE;
+				mbox->state |=
+				    OCTEON_MBOX_STATE_REQUEST_RECEIVING;
+				mbox->mbox_req.msg.u64 = msg.u64;
+				mbox->mbox_req.q_no = mbox->q_no;
+				mbox->mbox_req.recv_len = 1;
+			} else {
+				if ((mbox->state &
+				     OCTEON_MBOX_STATE_RESPONSE_PENDING) &&
+				    (msg.s.type == OCTEON_MBOX_RESPONSE)) {
+					mbox->state &=
+					    ~OCTEON_MBOX_STATE_RESPONSE_PENDING;
+					mbox->state |=
+					    OCTEON_MBOX_STATE_RESPONSE_RECEIVING
+					    ;
+					mbox->mbox_resp.msg.u64 = msg.u64;
+					mbox->mbox_resp.q_no = mbox->q_no;
+					mbox->mbox_resp.recv_len = 1;
+				} else {
+					writeq(OCTEON_PFVFERR,
+					       mbox->mbox_read_reg);
+					mbox->state |= OCTEON_MBOX_STATE_ERROR;
+					spin_unlock(&mbox->lock);
+					return 1;
+				}
+			}
+		}
+	}
+
+	if (mbox->state & OCTEON_MBOX_STATE_REQUEST_RECEIVING) {
+		if (mbox->mbox_req.recv_len < mbox->mbox_req.msg.s.len) {
+			ret = 0;
+		} else {
+			mbox->state &= ~OCTEON_MBOX_STATE_REQUEST_RECEIVING;
+			mbox->state |= OCTEON_MBOX_STATE_REQUEST_RECEIVED;
+			ret = 1;
+		}
+	} else {
+		if (mbox->state & OCTEON_MBOX_STATE_RESPONSE_RECEIVING) {
+			if (mbox->mbox_resp.recv_len <
+			    mbox->mbox_resp.msg.s.len) {
+				ret = 0;
+			} else {
+				mbox->state &=
+				    ~OCTEON_MBOX_STATE_RESPONSE_RECEIVING;
+				mbox->state |=
+				    OCTEON_MBOX_STATE_RESPONSE_RECEIVED;
+				ret = 1;
+			}
+		} else {
+			WARN_ON(1);
+		}
+	}
+
+	writeq(OCTEON_PFVFACK, mbox->mbox_read_reg);
+
+	spin_unlock(&mbox->lock);
+
+	return ret;
+}
+
+/**
+ * octeon_mbox_write:
+ * @oct: Pointer Octeon Device
+ * @mbox_cmd: Cmd to send to mailbox.
+ *
+ * Populates the queue specific mbox structure
+ * with cmd information.
+ * Write the cmd to mbox register
+ */
+int octeon_mbox_write(struct octeon_device *oct,
+		      struct octeon_mbox_cmd *mbox_cmd)
+{
+	struct octeon_mbox *mbox = oct->mbox[mbox_cmd->q_no];
+	u32 count, i, ret = OCTEON_MBOX_STATUS_SUCCESS;
+	long timeout = LIO_MBOX_WRITE_WAIT_TIME;
+	unsigned long flags;
+
+	spin_lock_irqsave(&mbox->lock, flags);
+
+	if ((mbox_cmd->msg.s.type == OCTEON_MBOX_RESPONSE) &&
+	    !(mbox->state & OCTEON_MBOX_STATE_REQUEST_RECEIVED)) {
+		spin_unlock_irqrestore(&mbox->lock, flags);
+		return OCTEON_MBOX_STATUS_FAILED;
+	}
+
+	if ((mbox_cmd->msg.s.type == OCTEON_MBOX_REQUEST) &&
+	    !(mbox->state & OCTEON_MBOX_STATE_IDLE)) {
+		spin_unlock_irqrestore(&mbox->lock, flags);
+		return OCTEON_MBOX_STATUS_BUSY;
+	}
+
+	if (mbox_cmd->msg.s.type == OCTEON_MBOX_REQUEST) {
+		memcpy(&mbox->mbox_resp, mbox_cmd,
+		       sizeof(struct octeon_mbox_cmd));
+		mbox->state = OCTEON_MBOX_STATE_RESPONSE_PENDING;
+	}
+
+	spin_unlock_irqrestore(&mbox->lock, flags);
+
+	count = 0;
+
+	while (readq(mbox->mbox_write_reg) != OCTEON_PFVFSIG) {
+		schedule_timeout_uninterruptible(timeout);
+		if (count++ == LIO_MBOX_WRITE_WAIT_CNT) {
+			ret = OCTEON_MBOX_STATUS_FAILED;
+			break;
+		}
+	}
+
+	if (ret == OCTEON_MBOX_STATUS_SUCCESS) {
+		writeq(mbox_cmd->msg.u64, mbox->mbox_write_reg);
+		for (i = 0; i < (u32)(mbox_cmd->msg.s.len - 1); i++) {
+			count = 0;
+			while (readq(mbox->mbox_write_reg) !=
+			       OCTEON_PFVFACK) {
+				schedule_timeout_uninterruptible(timeout);
+				if (count++ == LIO_MBOX_WRITE_WAIT_CNT) {
+					ret = OCTEON_MBOX_STATUS_FAILED;
+					break;
+				}
+			}
+			if (ret == OCTEON_MBOX_STATUS_SUCCESS)
+				writeq(mbox_cmd->data[i], mbox->mbox_write_reg);
+			else
+				break;
+		}
+	}
+
+	spin_lock_irqsave(&mbox->lock, flags);
+	if (mbox_cmd->msg.s.type == OCTEON_MBOX_RESPONSE) {
+		mbox->state = OCTEON_MBOX_STATE_IDLE;
+		writeq(OCTEON_PFVFSIG, mbox->mbox_read_reg);
+	} else {
+		if ((!mbox_cmd->msg.s.resp_needed) ||
+		    (ret == OCTEON_MBOX_STATUS_FAILED)) {
+			mbox->state &= ~OCTEON_MBOX_STATE_RESPONSE_PENDING;
+			if (!(mbox->state &
+			      (OCTEON_MBOX_STATE_REQUEST_RECEIVING |
+			       OCTEON_MBOX_STATE_REQUEST_RECEIVED)))
+				mbox->state = OCTEON_MBOX_STATE_IDLE;
+		}
+	}
+	spin_unlock_irqrestore(&mbox->lock, flags);
+
+	return ret;
+}
+
+static void get_vf_stats(struct octeon_device *oct,
+			 struct oct_vf_stats *stats)
+{
+	int i;
+
+	for (i = 0; i < oct->num_iqs; i++) {
+		if (!oct->instr_queue[i])
+			continue;
+		stats->tx_packets += oct->instr_queue[i]->stats.tx_done;
+		stats->tx_bytes += oct->instr_queue[i]->stats.tx_tot_bytes;
+	}
+
+	for (i = 0; i < oct->num_oqs; i++) {
+		if (!oct->droq[i])
+			continue;
+		stats->rx_packets += oct->droq[i]->stats.rx_pkts_received;
+		stats->rx_bytes += oct->droq[i]->stats.rx_bytes_received;
+	}
+}
+
+/**
+ * octeon_mbox_process_cmd:
+ * @mbox: Pointer mailbox
+ * @mbox_cmd: Pointer to command received
+ *
+ * Process the cmd received in mbox
+ */
+static int octeon_mbox_process_cmd(struct octeon_mbox *mbox,
+				   struct octeon_mbox_cmd *mbox_cmd)
+{
+	struct octeon_device *oct = mbox->oct_dev;
+
+	switch (mbox_cmd->msg.s.cmd) {
+	case OCTEON_VF_ACTIVE:
+		dev_dbg(&oct->pci_dev->dev, "got vfactive sending data back\n");
+		mbox_cmd->msg.s.type = OCTEON_MBOX_RESPONSE;
+		mbox_cmd->msg.s.resp_needed = 1;
+		mbox_cmd->msg.s.len = 2;
+		mbox_cmd->data[0] = 0; /* VF version is in mbox_cmd->data[0] */
+		((struct lio_version *)&mbox_cmd->data[0])->major =
+			LIQUIDIO_BASE_MAJOR_VERSION;
+		((struct lio_version *)&mbox_cmd->data[0])->minor =
+			LIQUIDIO_BASE_MINOR_VERSION;
+		((struct lio_version *)&mbox_cmd->data[0])->micro =
+			LIQUIDIO_BASE_MICRO_VERSION;
+		memcpy(mbox_cmd->msg.s.params, (uint8_t *)&oct->pfvf_hsword, 6);
+		/* Sending core cofig info to the corresponding active VF.*/
+		octeon_mbox_write(oct, mbox_cmd);
+		break;
+
+	case OCTEON_VF_FLR_REQUEST:
+		dev_info(&oct->pci_dev->dev,
+			 "got a request for FLR from VF that owns DPI ring %u\n",
+			 mbox->q_no);
+		pcie_capability_set_word(
+			oct->sriov_info.dpiring_to_vfpcidev_lut[mbox->q_no],
+			PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR);
+		break;
+
+	case OCTEON_PF_CHANGED_VF_MACADDR:
+		if (OCTEON_CN23XX_VF(oct))
+			octeon_pf_changed_vf_macaddr(oct,
+						     mbox_cmd->msg.s.params);
+		break;
+
+	case OCTEON_GET_VF_STATS:
+		dev_dbg(&oct->pci_dev->dev, "Got VF stats request. Sending data back\n");
+		mbox_cmd->msg.s.type = OCTEON_MBOX_RESPONSE;
+		mbox_cmd->msg.s.resp_needed = 1;
+		mbox_cmd->msg.s.len = 1 +
+			sizeof(struct oct_vf_stats) / sizeof(u64);
+		get_vf_stats(oct, (struct oct_vf_stats *)mbox_cmd->data);
+		octeon_mbox_write(oct, mbox_cmd);
+		break;
+	default:
+		break;
+	}
+	return 0;
+}
+
+/**
+ *octeon_mbox_process_message:
+ *
+ * Process the received mbox message.
+ */
+int octeon_mbox_process_message(struct octeon_mbox *mbox)
+{
+	struct octeon_mbox_cmd mbox_cmd;
+	unsigned long flags;
+
+	spin_lock_irqsave(&mbox->lock, flags);
+
+	if (mbox->state & OCTEON_MBOX_STATE_ERROR) {
+		if (mbox->state & (OCTEON_MBOX_STATE_RESPONSE_PENDING |
+				   OCTEON_MBOX_STATE_RESPONSE_RECEIVING)) {
+			memcpy(&mbox_cmd, &mbox->mbox_resp,
+			       sizeof(struct octeon_mbox_cmd));
+			mbox->state = OCTEON_MBOX_STATE_IDLE;
+			writeq(OCTEON_PFVFSIG, mbox->mbox_read_reg);
+			spin_unlock_irqrestore(&mbox->lock, flags);
+			mbox_cmd.recv_status = 1;
+			if (mbox_cmd.fn)
+				mbox_cmd.fn(mbox->oct_dev, &mbox_cmd,
+					    mbox_cmd.fn_arg);
+			return 0;
+		}
+
+		mbox->state = OCTEON_MBOX_STATE_IDLE;
+		writeq(OCTEON_PFVFSIG, mbox->mbox_read_reg);
+		spin_unlock_irqrestore(&mbox->lock, flags);
+		return 0;
+	}
+
+	if (mbox->state & OCTEON_MBOX_STATE_RESPONSE_RECEIVED) {
+		memcpy(&mbox_cmd, &mbox->mbox_resp,
+		       sizeof(struct octeon_mbox_cmd));
+		mbox->state = OCTEON_MBOX_STATE_IDLE;
+		writeq(OCTEON_PFVFSIG, mbox->mbox_read_reg);
+		spin_unlock_irqrestore(&mbox->lock, flags);
+		mbox_cmd.recv_status = 0;
+		if (mbox_cmd.fn)
+			mbox_cmd.fn(mbox->oct_dev, &mbox_cmd, mbox_cmd.fn_arg);
+		return 0;
+	}
+
+	if (mbox->state & OCTEON_MBOX_STATE_REQUEST_RECEIVED) {
+		memcpy(&mbox_cmd, &mbox->mbox_req,
+		       sizeof(struct octeon_mbox_cmd));
+		if (!mbox_cmd.msg.s.resp_needed) {
+			mbox->state &= ~OCTEON_MBOX_STATE_REQUEST_RECEIVED;
+			if (!(mbox->state &
+			      OCTEON_MBOX_STATE_RESPONSE_PENDING))
+				mbox->state = OCTEON_MBOX_STATE_IDLE;
+			writeq(OCTEON_PFVFSIG, mbox->mbox_read_reg);
+		}
+
+		spin_unlock_irqrestore(&mbox->lock, flags);
+		octeon_mbox_process_cmd(mbox, &mbox_cmd);
+		return 0;
+	}
+
+	spin_unlock_irqrestore(&mbox->lock, flags);
+	WARN_ON(1);
+
+	return 0;
+}
+
+int octeon_mbox_cancel(struct octeon_device *oct, int q_no)
+{
+	struct octeon_mbox *mbox = oct->mbox[q_no];
+	struct octeon_mbox_cmd *mbox_cmd;
+	unsigned long flags = 0;
+
+	spin_lock_irqsave(&mbox->lock, flags);
+	mbox_cmd = &mbox->mbox_resp;
+
+	if (!(mbox->state & OCTEON_MBOX_STATE_RESPONSE_PENDING)) {
+		spin_unlock_irqrestore(&mbox->lock, flags);
+		return 1;
+	}
+
+	mbox->state = OCTEON_MBOX_STATE_IDLE;
+	memset(mbox_cmd, 0, sizeof(*mbox_cmd));
+	writeq(OCTEON_PFVFSIG, mbox->mbox_read_reg);
+	spin_unlock_irqrestore(&mbox->lock, flags);
+
+	return 0;
+}