DPDK patches and discussions
 help / color / mirror / Atom feed
From: Chas Williams <3chas3@gmail.com>
To: dev@dpdk.org
Cc: harish.patil@qlogic.com, Chas Williams <3chas3@gmail.com>
Subject: [dpdk-dev] [PATCH v3 08/10] net/bnx2x: check return codes during VF mailbox operation
Date: Tue, 11 Oct 2016 19:04:59 -0400	[thread overview]
Message-ID: <1476227101-19268-8-git-send-email-3chas3@gmail.com> (raw)
In-Reply-To: <1476227101-19268-1-git-send-email-3chas3@gmail.com>

Refactor bnx2x_do_req4pf() to be easier to read and return errors when
the transaction fails -- Previously, it could succeed when the control
channel was down.

Fixes: 540a211084a7 ("bnx2x: driver core")

Signed-off-by: Chas Williams <3chas3@gmail.com>
---
 drivers/net/bnx2x/bnx2x_vfpf.c | 110 +++++++++++++++++++++++------------------
 1 file changed, 61 insertions(+), 49 deletions(-)

diff --git a/drivers/net/bnx2x/bnx2x_vfpf.c b/drivers/net/bnx2x/bnx2x_vfpf.c
index 340422d..0a8a6ed 100644
--- a/drivers/net/bnx2x/bnx2x_vfpf.c
+++ b/drivers/net/bnx2x/bnx2x_vfpf.c
@@ -118,39 +118,36 @@ bnx2x_do_req4pf(struct bnx2x_softc *sc, phys_addr_t phys_addr)
 	uint8_t *status = &sc->vf2pf_mbox->resp.common_reply.status;
 	uint8_t i;
 
-	if (!*status) {
-		bnx2x_check_bull(sc);
-		if (sc->old_bulletin.valid_bitmap & (1 << CHANNEL_DOWN)) {
-			PMD_DRV_LOG(ERR, "channel is down. Aborting message sending");
-			*status = BNX2X_VF_STATUS_SUCCESS;
-			return 0;
-		}
+	if (*status) {
+		PMD_DRV_LOG(ERR, "status should be zero before message"
+				 " to pf was sent");
+		return -EINVAL;
+	}
 
-		REG_WR(sc, BNX2X_VF_CMD_ADDR_LO, U64_LO(phys_addr));
-		REG_WR(sc, BNX2X_VF_CMD_ADDR_HI, U64_HI(phys_addr));
+	bnx2x_check_bull(sc);
+	if (sc->old_bulletin.valid_bitmap & (1 << CHANNEL_DOWN)) {
+		PMD_DRV_LOG(ERR, "channel is down. Aborting message sending");
+		return -EINVAL;
+	}
 
-		/* memory barrier to ensure that FW can read phys_addr */
-		wmb();
+	REG_WR(sc, BNX2X_VF_CMD_ADDR_LO, U64_LO(phys_addr));
+	REG_WR(sc, BNX2X_VF_CMD_ADDR_HI, U64_HI(phys_addr));
 
-		REG_WR8(sc, BNX2X_VF_CMD_TRIGGER, 1);
+	/* memory barrier to ensure that FW can read phys_addr */
+	wmb();
 
-		/* Do several attempts until PF completes
-		 * "." is used to show progress
-		 */
-		for (i = 0; i < BNX2X_VF_CHANNEL_TRIES; i++) {
-			DELAY_MS(BNX2X_VF_CHANNEL_DELAY);
-			if (*status)
-				break;
-		}
+	REG_WR8(sc, BNX2X_VF_CMD_TRIGGER, 1);
 
-		if (!*status) {
-			PMD_DRV_LOG(ERR, "Response from PF timed out");
-			return -EAGAIN;
-		}
-	} else {
-		PMD_DRV_LOG(ERR, "status should be zero before message"
-				"to pf was sent");
-		return -EINVAL;
+	/* Do several attempts until PF completes */
+	for (i = 0; i < BNX2X_VF_CHANNEL_TRIES; i++) {
+		DELAY_MS(BNX2X_VF_CHANNEL_DELAY);
+		if (*status)
+			break;
+	}
+
+	if (!*status) {
+		PMD_DRV_LOG(ERR, "Response from PF timed out");
+		return -EAGAIN;
 	}
 
 	PMD_DRV_LOG(DEBUG, "Response from PF was received");
@@ -338,6 +335,7 @@ bnx2x_vf_close(struct bnx2x_softc *sc)
 	struct vf_release_tlv *query;
 	struct vf_common_reply_tlv *reply = &sc->vf2pf_mbox->resp.common_reply;
 	int vf_id = bnx2x_read_vf_id(sc);
+	int rc;
 
 	if (vf_id >= 0) {
 		query = &sc->vf2pf_mbox->query[0].release;
@@ -349,8 +347,8 @@ bnx2x_vf_close(struct bnx2x_softc *sc)
 			      BNX2X_VF_TLV_LIST_END,
 			      sizeof(struct channel_list_end_tlv));
 
-		bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
-		if (reply->status != BNX2X_VF_STATUS_SUCCESS)
+		rc = bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
+		if (rc || reply->status != BNX2X_VF_STATUS_SUCCESS)
 			PMD_DRV_LOG(ERR, "Failed to release VF");
 
 		bnx2x_vf_finalize(sc, &query->first_tlv);
@@ -363,7 +361,7 @@ bnx2x_vf_init(struct bnx2x_softc *sc)
 {
 	struct vf_init_tlv *query;
 	struct vf_common_reply_tlv *reply = &sc->vf2pf_mbox->resp.common_reply;
-	int i, rc = 0;
+	int i, rc;
 
 	query = &sc->vf2pf_mbox->query[0].init;
 	bnx2x_vf_prep(sc, &query->first_tlv, BNX2X_VF_TLV_INIT,
@@ -381,7 +379,9 @@ bnx2x_vf_init(struct bnx2x_softc *sc)
 		      BNX2X_VF_TLV_LIST_END,
 		      sizeof(struct channel_list_end_tlv));
 
-	bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
+	rc = bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
+	if (rc)
+		goto out;
 	if (reply->status != BNX2X_VF_STATUS_SUCCESS) {
 		PMD_DRV_LOG(ERR, "Failed to init VF");
 		rc = -EINVAL;
@@ -400,7 +400,7 @@ bnx2x_vf_unload(struct bnx2x_softc *sc)
 	struct vf_close_tlv *query;
 	struct vf_common_reply_tlv *reply = &sc->vf2pf_mbox->resp.common_reply;
 	struct vf_q_op_tlv *query_op;
-	int i, vf_id;
+	int i, vf_id, rc;
 
 	vf_id = bnx2x_read_vf_id(sc);
 	if (vf_id > 0) {
@@ -417,8 +417,8 @@ bnx2x_vf_unload(struct bnx2x_softc *sc)
 				      BNX2X_VF_TLV_LIST_END,
 				      sizeof(struct channel_list_end_tlv));
 
-			bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
-			if (reply->status != BNX2X_VF_STATUS_SUCCESS)
+			rc = bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
+			if (rc || reply->status != BNX2X_VF_STATUS_SUCCESS)
 				PMD_DRV_LOG(ERR,
 					    "Bad reply for vf_q %d teardown", i);
 
@@ -437,8 +437,8 @@ bnx2x_vf_unload(struct bnx2x_softc *sc)
 			      BNX2X_VF_TLV_LIST_END,
 			      sizeof(struct channel_list_end_tlv));
 
-		bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
-		if (reply->status != BNX2X_VF_STATUS_SUCCESS)
+		rc = bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
+		if (rc || reply->status != BNX2X_VF_STATUS_SUCCESS)
 			PMD_DRV_LOG(ERR,
 				    "Bad reply from PF for close message");
 
@@ -507,7 +507,7 @@ bnx2x_vf_setup_queue(struct bnx2x_softc *sc, struct bnx2x_fastpath *fp, int lead
 	struct vf_setup_q_tlv *query;
 	struct vf_common_reply_tlv *reply = &sc->vf2pf_mbox->resp.common_reply;
 	uint16_t flags = bnx2x_vf_q_flags(leading);
-	int rc = 0;
+	int rc;
 
 	query = &sc->vf2pf_mbox->query[0].setup_q;
 	bnx2x_vf_prep(sc, &query->first_tlv, BNX2X_VF_TLV_SETUP_Q,
@@ -523,13 +523,15 @@ bnx2x_vf_setup_queue(struct bnx2x_softc *sc, struct bnx2x_fastpath *fp, int lead
 		      BNX2X_VF_TLV_LIST_END,
 		      sizeof(struct channel_list_end_tlv));
 
-	bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
+	rc = bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
+	if (rc)
+		goto out;
 	if (reply->status != BNX2X_VF_STATUS_SUCCESS) {
 		PMD_DRV_LOG(ERR, "Failed to setup VF queue[%d]",
 				 fp->index);
 		rc = -EINVAL;
 	}
-
+out:
 	bnx2x_vf_finalize(sc, &query->first_tlv);
 
 	return rc;
@@ -540,7 +542,7 @@ bnx2x_vf_set_mac(struct bnx2x_softc *sc, int set)
 {
 	struct vf_set_q_filters_tlv *query;
 	struct vf_common_reply_tlv *reply;
-	int rc = 0;
+	int rc;
 
 	query = &sc->vf2pf_mbox->query[0].set_q_filters;
 	bnx2x_vf_prep(sc, &query->first_tlv, BNX2X_VF_TLV_SET_Q_FILTERS,
@@ -561,7 +563,9 @@ bnx2x_vf_set_mac(struct bnx2x_softc *sc, int set)
 		      BNX2X_VF_TLV_LIST_END,
 		      sizeof(struct channel_list_end_tlv));
 
-	bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
+	rc = bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
+	if (rc)
+		goto out;
 	reply = &sc->vf2pf_mbox->resp.common_reply;
 
 	while (BNX2X_VF_STATUS_FAILURE == reply->status &&
@@ -572,7 +576,9 @@ bnx2x_vf_set_mac(struct bnx2x_softc *sc, int set)
 		rte_memcpy(query->filters[0].mac, sc->pf2vf_bulletin->mac,
 				ETH_ALEN);
 
-		bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
+		rc = bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
+		if (rc)
+			goto out;
 	}
 
 	if (BNX2X_VF_STATUS_SUCCESS != reply->status) {
@@ -580,7 +586,7 @@ bnx2x_vf_set_mac(struct bnx2x_softc *sc, int set)
 				reply->status);
 		rc = -EINVAL;
 	}
-
+out:
 	bnx2x_vf_finalize(sc, &query->first_tlv);
 
 	return rc;
@@ -592,7 +598,7 @@ bnx2x_vf_config_rss(struct bnx2x_softc *sc,
 {
 	struct vf_rss_tlv *query;
 	struct vf_common_reply_tlv *reply = &sc->vf2pf_mbox->resp.common_reply;
-	int rc = 0;
+	int rc;
 
 	query = &sc->vf2pf_mbox->query[0].update_rss;
 
@@ -613,12 +619,15 @@ bnx2x_vf_config_rss(struct bnx2x_softc *sc,
 	query->rss_result_mask = params->rss_result_mask;
 	query->rss_flags = params->rss_flags;
 
-	bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
+	rc = bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
+	if (rc)
+		goto out;
+
 	if (reply->status != BNX2X_VF_STATUS_SUCCESS) {
 		PMD_DRV_LOG(ERR, "Failed to configure RSS");
 		rc = -EINVAL;
 	}
-
+out:
 	bnx2x_vf_finalize(sc, &query->first_tlv);
 
 	return rc;
@@ -629,7 +638,7 @@ bnx2x_vf_set_rx_mode(struct bnx2x_softc *sc)
 {
 	struct vf_set_q_filters_tlv *query;
 	struct vf_common_reply_tlv *reply = &sc->vf2pf_mbox->resp.common_reply;
-	int rc = 0;
+	int rc;
 
 	query = &sc->vf2pf_mbox->query[0].set_q_filters;
 	bnx2x_vf_prep(sc, &query->first_tlv, BNX2X_VF_TLV_SET_Q_FILTERS,
@@ -667,7 +676,10 @@ bnx2x_vf_set_rx_mode(struct bnx2x_softc *sc)
 		      BNX2X_VF_TLV_LIST_END,
 		      sizeof(struct channel_list_end_tlv));
 
-	bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
+	rc = bnx2x_do_req4pf(sc, sc->vf2pf_mbox_mapping.paddr);
+	if (rc)
+		goto out;
+
 	if (reply->status != BNX2X_VF_STATUS_SUCCESS) {
 		PMD_DRV_LOG(ERR, "Failed to set RX mode");
 		rc = -EINVAL;
-- 
2.7.4

  parent reply	other threads:[~2016-10-11 23:05 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-11 23:04 [dpdk-dev] [PATCH v3 01/10] net/bnx2x: set cache line based on build configuration Chas Williams
2016-10-11 23:04 ` [dpdk-dev] [PATCH v3 02/10] net/bnx2x: remove unused preprocessor symbols and code Chas Williams
2016-10-11 23:04 ` [dpdk-dev] [PATCH v3 03/10] net/bnx2x: remove delay during device startup Chas Williams
2016-10-11 23:04 ` [dpdk-dev] [PATCH v3 04/10] net/bnx2x: remove unused RX queue code Chas Williams
2016-10-11 23:04 ` [dpdk-dev] [PATCH v3 05/10] net/bnx2x: restrict RX mask flags sent to the PF Chas Williams
2016-10-11 23:04 ` [dpdk-dev] [PATCH v3 06/10] net/bnx2x: replace macro with static function Chas Williams
2016-10-11 23:04 ` [dpdk-dev] [PATCH v3 07/10] net/bnx2x: serialize access to pf2vf mailbox Chas Williams
2016-10-11 23:04 ` Chas Williams [this message]
2016-10-11 23:05 ` [dpdk-dev] [PATCH v3 09/10] net/bnx2x: don't return structs Chas Williams
2016-10-11 23:05 ` [dpdk-dev] [PATCH v3 10/10] net/bnx2x: merge debug register operations into headers Chas Williams
2016-10-13  9:45 ` [dpdk-dev] [PATCH v3 01/10] net/bnx2x: set cache line based on build configuration Bruce Richardson

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1476227101-19268-8-git-send-email-3chas3@gmail.com \
    --to=3chas3@gmail.com \
    --cc=dev@dpdk.org \
    --cc=harish.patil@qlogic.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).