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-rw-r--r--drivers/net/ethernet/qlogic/qed/qed_iwarp.c36
-rw-r--r--drivers/net/ethernet/qlogic/qed/qed_iwarp.h6
2 files changed, 41 insertions, 1 deletions
diff --git a/drivers/net/ethernet/qlogic/qed/qed_iwarp.c b/drivers/net/ethernet/qlogic/qed/qed_iwarp.c
index 8b17369af9ef..299494225f44 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_iwarp.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_iwarp.c
@@ -1742,6 +1742,7 @@ enum qed_iwarp_mpa_pkt_type {
QED_IWARP_MPA_PKT_UNALIGNED
};
+#define QED_IWARP_INVALID_FPDU_LENGTH 0xffff
#define QED_IWARP_MPA_FPDU_LENGTH_SIZE (2)
#define QED_IWARP_MPA_CRC32_DIGEST_SIZE (4)
@@ -1774,6 +1775,15 @@ qed_iwarp_mpa_classify(struct qed_hwfn *p_hwfn,
goto out;
}
+ /* special case of one byte remaining...
+ * lower byte will be read next packet
+ */
+ if (tcp_payload_len == 1) {
+ fpdu->fpdu_length = *mpa_data << BITS_PER_BYTE;
+ pkt_type = QED_IWARP_MPA_PKT_PARTIAL;
+ goto out;
+ }
+
mpa_len = ntohs(*((u16 *)(mpa_data)));
fpdu->fpdu_length = QED_IWARP_FPDU_LEN_WITH_PAD(mpa_len);
@@ -1802,7 +1812,9 @@ qed_iwarp_init_fpdu(struct qed_iwarp_ll2_buff *buf,
fpdu->mpa_frag = buf->data_phys_addr + pkt_data->first_mpa_offset;
fpdu->mpa_frag_virt = (u8 *)(buf->data) + pkt_data->first_mpa_offset;
- if (tcp_payload_size < fpdu->fpdu_length)
+ if (tcp_payload_size == 1)
+ fpdu->incomplete_bytes = QED_IWARP_INVALID_FPDU_LENGTH;
+ else if (tcp_payload_size < fpdu->fpdu_length)
fpdu->incomplete_bytes = fpdu->fpdu_length - tcp_payload_size;
else
fpdu->incomplete_bytes = 0; /* complete fpdu */
@@ -1810,6 +1822,27 @@ qed_iwarp_init_fpdu(struct qed_iwarp_ll2_buff *buf,
fpdu->mpa_frag_len = fpdu->fpdu_length - fpdu->incomplete_bytes;
}
+static void
+qed_iwarp_update_fpdu_length(struct qed_hwfn *p_hwfn,
+ struct qed_iwarp_fpdu *fpdu, u8 *mpa_data)
+{
+ u16 mpa_len;
+
+ /* Update incomplete packets if needed */
+ if (fpdu->incomplete_bytes == QED_IWARP_INVALID_FPDU_LENGTH) {
+ /* Missing lower byte is now available */
+ mpa_len = fpdu->fpdu_length | *mpa_data;
+ fpdu->fpdu_length = QED_IWARP_FPDU_LEN_WITH_PAD(mpa_len);
+ fpdu->mpa_frag_len = fpdu->fpdu_length;
+ /* one byte of hdr */
+ fpdu->incomplete_bytes = fpdu->fpdu_length - 1;
+ DP_VERBOSE(p_hwfn,
+ QED_MSG_RDMA,
+ "MPA_ALIGN: Partial header mpa_len=%x fpdu_length=%x incomplete_bytes=%x\n",
+ mpa_len, fpdu->fpdu_length, fpdu->incomplete_bytes);
+ }
+}
+
static int
qed_iwarp_send_fpdu(struct qed_hwfn *p_hwfn,
struct qed_iwarp_fpdu *fpdu,
@@ -1960,6 +1993,7 @@ qed_iwarp_process_mpa_pkt(struct qed_hwfn *p_hwfn,
curr_pkt->first_mpa_offset += fpdu->fpdu_length;
break;
case QED_IWARP_MPA_PKT_UNALIGNED:
+ qed_iwarp_update_fpdu_length(p_hwfn, fpdu, mpa_data);
rc = qed_iwarp_send_fpdu(p_hwfn, fpdu, curr_pkt, buf,
mpa_buf->tcp_payload_len,
pkt_type);
diff --git a/drivers/net/ethernet/qlogic/qed/qed_iwarp.h b/drivers/net/ethernet/qlogic/qed/qed_iwarp.h
index 58db51af26bd..c58793a47774 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_iwarp.h
+++ b/drivers/net/ethernet/qlogic/qed/qed_iwarp.h
@@ -69,6 +69,12 @@ struct qed_iwarp_ll2_mpa_buf {
u8 placement_offset;
};
+/* In some cases a fpdu will arrive with only one byte of the header, in this
+ * case the fpdu_length will be partial (contain only higher byte and
+ * incomplete bytes will contain the invalid value
+ */
+#define QED_IWARP_INVALID_INCOMPLETE_BYTES 0xffff
+
struct qed_iwarp_fpdu {
struct qed_iwarp_ll2_buff *mpa_buf;
void *mpa_frag_virt;