diff --git a/target/linux/generic/backport-5.15/776-v6.1-01-net-dsa-qca8k-fix-inband-mgmt-for-big-endian-systems.patch b/target/linux/generic/backport-5.15/776-v6.1-01-net-dsa-qca8k-fix-inband-mgmt-for-big-endian-systems.patch new file mode 100644 index 00000000000..e706874a6a9 --- /dev/null +++ b/target/linux/generic/backport-5.15/776-v6.1-01-net-dsa-qca8k-fix-inband-mgmt-for-big-endian-systems.patch @@ -0,0 +1,163 @@ +From a2550d3ce53c68f54042bc5e468c4d07491ffe0e Mon Sep 17 00:00:00 2001 +From: Christian Marangi +Date: Wed, 12 Oct 2022 19:18:36 +0200 +Subject: [PATCH 1/2] net: dsa: qca8k: fix inband mgmt for big-endian systems + +The header and the data of the skb for the inband mgmt requires +to be in little-endian. This is problematic for big-endian system +as the mgmt header is written in the cpu byte order. + +Fix this by converting each value for the mgmt header and data to +little-endian, and convert to cpu byte order the mgmt header and +data sent by the switch. + +Fixes: 5950c7c0a68c ("net: dsa: qca8k: add support for mgmt read/write in Ethernet packet") +Tested-by: Pawel Dembicki +Tested-by: Lech Perczak +Signed-off-by: Christian Marangi +Reviewed-by: Lech Perczak +Signed-off-by: David S. Miller +--- + drivers/net/dsa/qca/qca8k-8xxx.c | 63 ++++++++++++++++++++++++-------- + include/linux/dsa/tag_qca.h | 6 +-- + 2 files changed, 50 insertions(+), 19 deletions(-) + +diff --git a/drivers/net/dsa/qca/qca8k-8xxx.c b/drivers/net/dsa/qca/qca8k-8xxx.c +index 5669c92c93f7..644338ca0510 100644 +--- a/drivers/net/dsa/qca/qca8k-8xxx.c ++++ b/drivers/net/dsa/qca/qca8k-8xxx.c +@@ -137,27 +137,42 @@ static void qca8k_rw_reg_ack_handler(struct dsa_switch *ds, struct sk_buff *skb) + struct qca8k_mgmt_eth_data *mgmt_eth_data; + struct qca8k_priv *priv = ds->priv; + struct qca_mgmt_ethhdr *mgmt_ethhdr; ++ u32 command; + u8 len, cmd; ++ int i; + + mgmt_ethhdr = (struct qca_mgmt_ethhdr *)skb_mac_header(skb); + mgmt_eth_data = &priv->mgmt_eth_data; + +- cmd = FIELD_GET(QCA_HDR_MGMT_CMD, mgmt_ethhdr->command); +- len = FIELD_GET(QCA_HDR_MGMT_LENGTH, mgmt_ethhdr->command); ++ command = get_unaligned_le32(&mgmt_ethhdr->command); ++ cmd = FIELD_GET(QCA_HDR_MGMT_CMD, command); ++ len = FIELD_GET(QCA_HDR_MGMT_LENGTH, command); + + /* Make sure the seq match the requested packet */ +- if (mgmt_ethhdr->seq == mgmt_eth_data->seq) ++ if (get_unaligned_le32(&mgmt_ethhdr->seq) == mgmt_eth_data->seq) + mgmt_eth_data->ack = true; + + if (cmd == MDIO_READ) { +- mgmt_eth_data->data[0] = mgmt_ethhdr->mdio_data; ++ u32 *val = mgmt_eth_data->data; ++ ++ *val = get_unaligned_le32(&mgmt_ethhdr->mdio_data); + + /* Get the rest of the 12 byte of data. + * The read/write function will extract the requested data. + */ +- if (len > QCA_HDR_MGMT_DATA1_LEN) +- memcpy(mgmt_eth_data->data + 1, skb->data, +- QCA_HDR_MGMT_DATA2_LEN); ++ if (len > QCA_HDR_MGMT_DATA1_LEN) { ++ __le32 *data2 = (__le32 *)skb->data; ++ int data_len = min_t(int, QCA_HDR_MGMT_DATA2_LEN, ++ len - QCA_HDR_MGMT_DATA1_LEN); ++ ++ val++; ++ ++ for (i = sizeof(u32); i <= data_len; i += sizeof(u32)) { ++ *val = get_unaligned_le32(data2); ++ val++; ++ data2++; ++ } ++ } + } + + complete(&mgmt_eth_data->rw_done); +@@ -169,8 +184,10 @@ static struct sk_buff *qca8k_alloc_mdio_header(enum mdio_cmd cmd, u32 reg, u32 * + struct qca_mgmt_ethhdr *mgmt_ethhdr; + unsigned int real_len; + struct sk_buff *skb; +- u32 *data2; ++ __le32 *data2; ++ u32 command; + u16 hdr; ++ int i; + + skb = dev_alloc_skb(QCA_HDR_MGMT_PKT_LEN); + if (!skb) +@@ -199,20 +216,32 @@ static struct sk_buff *qca8k_alloc_mdio_header(enum mdio_cmd cmd, u32 reg, u32 * + hdr |= FIELD_PREP(QCA_HDR_XMIT_DP_BIT, BIT(0)); + hdr |= FIELD_PREP(QCA_HDR_XMIT_CONTROL, QCA_HDR_XMIT_TYPE_RW_REG); + +- mgmt_ethhdr->command = FIELD_PREP(QCA_HDR_MGMT_ADDR, reg); +- mgmt_ethhdr->command |= FIELD_PREP(QCA_HDR_MGMT_LENGTH, real_len); +- mgmt_ethhdr->command |= FIELD_PREP(QCA_HDR_MGMT_CMD, cmd); +- mgmt_ethhdr->command |= FIELD_PREP(QCA_HDR_MGMT_CHECK_CODE, ++ command = FIELD_PREP(QCA_HDR_MGMT_ADDR, reg); ++ command |= FIELD_PREP(QCA_HDR_MGMT_LENGTH, real_len); ++ command |= FIELD_PREP(QCA_HDR_MGMT_CMD, cmd); ++ command |= FIELD_PREP(QCA_HDR_MGMT_CHECK_CODE, + QCA_HDR_MGMT_CHECK_CODE_VAL); + ++ put_unaligned_le32(command, &mgmt_ethhdr->command); ++ + if (cmd == MDIO_WRITE) +- mgmt_ethhdr->mdio_data = *val; ++ put_unaligned_le32(*val, &mgmt_ethhdr->mdio_data); + + mgmt_ethhdr->hdr = htons(hdr); + + data2 = skb_put_zero(skb, QCA_HDR_MGMT_DATA2_LEN + QCA_HDR_MGMT_PADDING_LEN); +- if (cmd == MDIO_WRITE && len > QCA_HDR_MGMT_DATA1_LEN) +- memcpy(data2, val + 1, len - QCA_HDR_MGMT_DATA1_LEN); ++ if (cmd == MDIO_WRITE && len > QCA_HDR_MGMT_DATA1_LEN) { ++ int data_len = min_t(int, QCA_HDR_MGMT_DATA2_LEN, ++ len - QCA_HDR_MGMT_DATA1_LEN); ++ ++ val++; ++ ++ for (i = sizeof(u32); i <= data_len; i += sizeof(u32)) { ++ put_unaligned_le32(*val, data2); ++ data2++; ++ val++; ++ } ++ } + + return skb; + } +@@ -220,9 +249,11 @@ static struct sk_buff *qca8k_alloc_mdio_header(enum mdio_cmd cmd, u32 reg, u32 * + static void qca8k_mdio_header_fill_seq_num(struct sk_buff *skb, u32 seq_num) + { + struct qca_mgmt_ethhdr *mgmt_ethhdr; ++ u32 seq; + ++ seq = FIELD_PREP(QCA_HDR_MGMT_SEQ_NUM, seq_num); + mgmt_ethhdr = (struct qca_mgmt_ethhdr *)skb->data; +- mgmt_ethhdr->seq = FIELD_PREP(QCA_HDR_MGMT_SEQ_NUM, seq_num); ++ put_unaligned_le32(seq, &mgmt_ethhdr->seq); + } + + static int qca8k_read_eth(struct qca8k_priv *priv, u32 reg, u32 *val, int len) +diff --git a/include/linux/dsa/tag_qca.h b/include/linux/dsa/tag_qca.h +index 50be7cbd93a5..0e176da1e43f 100644 +--- a/include/linux/dsa/tag_qca.h ++++ b/include/linux/dsa/tag_qca.h +@@ -61,9 +61,9 @@ struct sk_buff; + + /* Special struct emulating a Ethernet header */ + struct qca_mgmt_ethhdr { +- u32 command; /* command bit 31:0 */ +- u32 seq; /* seq 63:32 */ +- u32 mdio_data; /* first 4byte mdio */ ++ __le32 command; /* command bit 31:0 */ ++ __le32 seq; /* seq 63:32 */ ++ __le32 mdio_data; /* first 4byte mdio */ + __be16 hdr; /* qca hdr */ + } __packed; + +-- +2.37.2 + diff --git a/target/linux/generic/backport-5.15/776-v6.1-02-net-dsa-qca8k-fix-ethtool-autocast-mib-for-big-endia.patch b/target/linux/generic/backport-5.15/776-v6.1-02-net-dsa-qca8k-fix-ethtool-autocast-mib-for-big-endia.patch new file mode 100644 index 00000000000..93c0bb85b5b --- /dev/null +++ b/target/linux/generic/backport-5.15/776-v6.1-02-net-dsa-qca8k-fix-ethtool-autocast-mib-for-big-endia.patch @@ -0,0 +1,88 @@ +From 0d4636f7d72df3179b20a2d32b647881917a5e2a Mon Sep 17 00:00:00 2001 +From: Christian Marangi +Date: Wed, 12 Oct 2022 19:18:37 +0200 +Subject: [PATCH 2/2] net: dsa: qca8k: fix ethtool autocast mib for big-endian + systems + +The switch sends autocast mib in little-endian. This is problematic for +big-endian system as the values needs to be converted. + +Fix this by converting each mib value to cpu byte order. + +Fixes: 5c957c7ca78c ("net: dsa: qca8k: add support for mib autocast in Ethernet packet") +Tested-by: Pawel Dembicki +Tested-by: Lech Perczak +Signed-off-by: Christian Marangi +Signed-off-by: David S. Miller +--- + drivers/net/dsa/qca/qca8k-8xxx.c | 20 ++++++++------------ + include/linux/dsa/tag_qca.h | 2 +- + 2 files changed, 9 insertions(+), 13 deletions(-) + +diff --git a/drivers/net/dsa/qca/qca8k-8xxx.c b/drivers/net/dsa/qca/qca8k-8xxx.c +index 644338ca0510..c5c3b4e92f28 100644 +--- a/drivers/net/dsa/qca/qca8k-8xxx.c ++++ b/drivers/net/dsa/qca/qca8k-8xxx.c +@@ -1518,9 +1518,9 @@ static void qca8k_mib_autocast_handler(struct dsa_switch *ds, struct sk_buff *sk + struct qca8k_priv *priv = ds->priv; + const struct qca8k_mib_desc *mib; + struct mib_ethhdr *mib_ethhdr; +- int i, mib_len, offset = 0; +- u64 *data; ++ __le32 *data2; + u8 port; ++ int i; + + mib_ethhdr = (struct mib_ethhdr *)skb_mac_header(skb); + mib_eth_data = &priv->mib_eth_data; +@@ -1532,28 +1532,24 @@ static void qca8k_mib_autocast_handler(struct dsa_switch *ds, struct sk_buff *sk + if (port != mib_eth_data->req_port) + goto exit; + +- data = mib_eth_data->data; ++ data2 = (__le32 *)skb->data; + + for (i = 0; i < priv->info->mib_count; i++) { + mib = &ar8327_mib[i]; + + /* First 3 mib are present in the skb head */ + if (i < 3) { +- data[i] = mib_ethhdr->data[i]; ++ mib_eth_data->data[i] = get_unaligned_le32(mib_ethhdr->data + i); + continue; + } + +- mib_len = sizeof(uint32_t); +- + /* Some mib are 64 bit wide */ + if (mib->size == 2) +- mib_len = sizeof(uint64_t); +- +- /* Copy the mib value from packet to the */ +- memcpy(data + i, skb->data + offset, mib_len); ++ mib_eth_data->data[i] = get_unaligned_le64((__le64 *)data2); ++ else ++ mib_eth_data->data[i] = get_unaligned_le32(data2); + +- /* Set the offset for the next mib */ +- offset += mib_len; ++ data2 += mib->size; + } + + exit: +diff --git a/include/linux/dsa/tag_qca.h b/include/linux/dsa/tag_qca.h +index 0e176da1e43f..b1b5720d89a5 100644 +--- a/include/linux/dsa/tag_qca.h ++++ b/include/linux/dsa/tag_qca.h +@@ -73,7 +73,7 @@ enum mdio_cmd { + }; + + struct mib_ethhdr { +- u32 data[3]; /* first 3 mib counter */ ++ __le32 data[3]; /* first 3 mib counter */ + __be16 hdr; /* qca hdr */ + } __packed; + +-- +2.37.2 +