--- /dev/null
+/*
+ * This contains the functions to handle the descriptors for DesignWare databook
+ * 4.xx.
+ *
+ * Copyright (C) 2015 STMicroelectronics Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * Author: Alexandre Torgue <alexandre.torgue@st.com>
+ */
+
+#include <linux/stmmac.h>
+#include "common.h"
+#include "dwmac4_descs.h"
+
+static int dwmac4_wrback_get_tx_status(void *data, struct stmmac_extra_stats *x,
+ struct dma_desc *p,
+ void __iomem *ioaddr)
+{
+ struct net_device_stats *stats = (struct net_device_stats *)data;
+ unsigned int tdes3;
+ int ret = tx_done;
+
+ tdes3 = p->des3;
+
+ /* Get tx owner first */
+ if (unlikely(tdes3 & TDES3_OWN))
+ return tx_dma_own;
+
+ /* Verify tx error by looking at the last segment. */
+ if (likely(!(tdes3 & TDES3_LAST_DESCRIPTOR)))
+ return tx_not_ls;
+
+ if (unlikely(tdes3 & TDES3_ERROR_SUMMARY)) {
+ if (unlikely(tdes3 & TDES3_JABBER_TIMEOUT))
+ x->tx_jabber++;
+ if (unlikely(tdes3 & TDES3_PACKET_FLUSHED))
+ x->tx_frame_flushed++;
+ if (unlikely(tdes3 & TDES3_LOSS_CARRIER)) {
+ x->tx_losscarrier++;
+ stats->tx_carrier_errors++;
+ }
+ if (unlikely(tdes3 & TDES3_NO_CARRIER)) {
+ x->tx_carrier++;
+ stats->tx_carrier_errors++;
+ }
+ if (unlikely((tdes3 & TDES3_LATE_COLLISION) ||
+ (tdes3 & TDES3_EXCESSIVE_COLLISION)))
+ stats->collisions +=
+ (tdes3 & TDES3_COLLISION_COUNT_MASK)
+ >> TDES3_COLLISION_COUNT_SHIFT;
+
+ if (unlikely(tdes3 & TDES3_EXCESSIVE_DEFERRAL))
+ x->tx_deferred++;
+
+ if (unlikely(tdes3 & TDES3_UNDERFLOW_ERROR))
+ x->tx_underflow++;
+
+ if (unlikely(tdes3 & TDES3_IP_HDR_ERROR))
+ x->tx_ip_header_error++;
+
+ if (unlikely(tdes3 & TDES3_PAYLOAD_ERROR))
+ x->tx_payload_error++;
+
+ ret = tx_err;
+ }
+
+ if (unlikely(tdes3 & TDES3_DEFERRED))
+ x->tx_deferred++;
+
+ return ret;
+}
+
+static int dwmac4_wrback_get_rx_status(void *data, struct stmmac_extra_stats *x,
+ struct dma_desc *p)
+{
+ struct net_device_stats *stats = (struct net_device_stats *)data;
+ unsigned int rdes1 = p->des1;
+ unsigned int rdes2 = p->des2;
+ unsigned int rdes3 = p->des3;
+ int message_type;
+ int ret = good_frame;
+
+ if (unlikely(rdes3 & RDES3_OWN))
+ return dma_own;
+
+ /* Verify rx error by looking at the last segment. */
+ if (likely(!(rdes3 & RDES3_LAST_DESCRIPTOR)))
+ return discard_frame;
+
+ if (unlikely(rdes3 & RDES3_ERROR_SUMMARY)) {
+ if (unlikely(rdes3 & RDES3_GIANT_PACKET))
+ stats->rx_length_errors++;
+ if (unlikely(rdes3 & RDES3_OVERFLOW_ERROR))
+ x->rx_gmac_overflow++;
+
+ if (unlikely(rdes3 & RDES3_RECEIVE_WATCHDOG))
+ x->rx_watchdog++;
+
+ if (unlikely(rdes3 & RDES3_RECEIVE_ERROR))
+ x->rx_mii++;
+
+ if (unlikely(rdes3 & RDES3_CRC_ERROR)) {
+ x->rx_crc++;
+ stats->rx_crc_errors++;
+ }
+
+ if (unlikely(rdes3 & RDES3_DRIBBLE_ERROR))
+ x->dribbling_bit++;
+
+ ret = discard_frame;
+ }
+
+ message_type = (rdes1 & ERDES4_MSG_TYPE_MASK) >> 8;
+
+ if (rdes1 & RDES1_IP_HDR_ERROR)
+ x->ip_hdr_err++;
+ if (rdes1 & RDES1_IP_CSUM_BYPASSED)
+ x->ip_csum_bypassed++;
+ if (rdes1 & RDES1_IPV4_HEADER)
+ x->ipv4_pkt_rcvd++;
+ if (rdes1 & RDES1_IPV6_HEADER)
+ x->ipv6_pkt_rcvd++;
+ if (message_type == RDES_EXT_SYNC)
+ x->rx_msg_type_sync++;
+ else if (message_type == RDES_EXT_FOLLOW_UP)
+ x->rx_msg_type_follow_up++;
+ else if (message_type == RDES_EXT_DELAY_REQ)
+ x->rx_msg_type_delay_req++;
+ else if (message_type == RDES_EXT_DELAY_RESP)
+ x->rx_msg_type_delay_resp++;
+ else if (message_type == RDES_EXT_PDELAY_REQ)
+ x->rx_msg_type_pdelay_req++;
+ else if (message_type == RDES_EXT_PDELAY_RESP)
+ x->rx_msg_type_pdelay_resp++;
+ else if (message_type == RDES_EXT_PDELAY_FOLLOW_UP)
+ x->rx_msg_type_pdelay_follow_up++;
+ else
+ x->rx_msg_type_ext_no_ptp++;
+
+ if (rdes1 & RDES1_PTP_PACKET_TYPE)
+ x->ptp_frame_type++;
+ if (rdes1 & RDES1_PTP_VER)
+ x->ptp_ver++;
+ if (rdes1 & RDES1_TIMESTAMP_DROPPED)
+ x->timestamp_dropped++;
+
+ if (unlikely(rdes2 & RDES2_SA_FILTER_FAIL)) {
+ x->sa_rx_filter_fail++;
+ ret = discard_frame;
+ }
+ if (unlikely(rdes2 & RDES2_DA_FILTER_FAIL)) {
+ x->da_rx_filter_fail++;
+ ret = discard_frame;
+ }
+
+ if (rdes2 & RDES2_L3_FILTER_MATCH)
+ x->l3_filter_match++;
+ if (rdes2 & RDES2_L4_FILTER_MATCH)
+ x->l4_filter_match++;
+ if ((rdes2 & RDES2_L3_L4_FILT_NB_MATCH_MASK)
+ >> RDES2_L3_L4_FILT_NB_MATCH_SHIFT)
+ x->l3_l4_filter_no_match++;
+
+ return ret;
+}
+
+static int dwmac4_rd_get_tx_len(struct dma_desc *p)
+{
+ return (p->des2 & TDES2_BUFFER1_SIZE_MASK);
+}
+
+static int dwmac4_get_tx_owner(struct dma_desc *p)
+{
+ return (p->des3 & TDES3_OWN) >> TDES3_OWN_SHIFT;
+}
+
+static void dwmac4_set_tx_owner(struct dma_desc *p)
+{
+ p->des3 |= TDES3_OWN;
+}
+
+static void dwmac4_set_rx_owner(struct dma_desc *p)
+{
+ p->des3 |= RDES3_OWN;
+}
+
+static int dwmac4_get_tx_ls(struct dma_desc *p)
+{
+ return (p->des3 & TDES3_LAST_DESCRIPTOR) >> TDES3_LAST_DESCRIPTOR_SHIFT;
+}
+
+static int dwmac4_wrback_get_rx_frame_len(struct dma_desc *p, int rx_coe)
+{
+ return (p->des3 & RDES3_PACKET_SIZE_MASK);
+}
+
+static void dwmac4_rd_enable_tx_timestamp(struct dma_desc *p)
+{
+ p->des2 |= TDES2_TIMESTAMP_ENABLE;
+}
+
+static int dwmac4_wrback_get_tx_timestamp_status(struct dma_desc *p)
+{
+ return (p->des3 & TDES3_TIMESTAMP_STATUS)
+ >> TDES3_TIMESTAMP_STATUS_SHIFT;
+}
+
+/* NOTE: For RX CTX bit has to be checked before
+ * HAVE a specific function for TX and another one for RX
+ */
+static u64 dwmac4_wrback_get_timestamp(void *desc, u32 ats)
+{
+ struct dma_desc *p = (struct dma_desc *)desc;
+ u64 ns;
+
+ ns = p->des0;
+ /* convert high/sec time stamp value to nanosecond */
+ ns += p->des1 * 1000000000ULL;
+
+ return ns;
+}
+
+static int dwmac4_context_get_rx_timestamp_status(void *desc, u32 ats)
+{
+ struct dma_desc *p = (struct dma_desc *)desc;
+
+ return (p->des1 & RDES1_TIMESTAMP_AVAILABLE)
+ >> RDES1_TIMESTAMP_AVAILABLE_SHIFT;
+}
+
+static void dwmac4_rd_init_rx_desc(struct dma_desc *p, int disable_rx_ic,
+ int mode, int end)
+{
+ p->des3 = RDES3_OWN | RDES3_BUFFER1_VALID_ADDR;
+
+ if (!disable_rx_ic)
+ p->des3 |= RDES3_INT_ON_COMPLETION_EN;
+}
+
+static void dwmac4_rd_init_tx_desc(struct dma_desc *p, int mode, int end)
+{
+ p->des0 = 0;
+ p->des1 = 0;
+ p->des2 = 0;
+ p->des3 = 0;
+}
+
+static void dwmac4_rd_prepare_tx_desc(struct dma_desc *p, int is_fs, int len,
+ bool csum_flag, int mode, bool tx_own,
+ bool ls)
+{
+ unsigned int tdes3 = p->des3;
+
+ if (unlikely(len > BUF_SIZE_16KiB)) {
+ p->des2 |= (((len - BUF_SIZE_16KiB) <<
+ TDES2_BUFFER2_SIZE_MASK_SHIFT)
+ & TDES2_BUFFER2_SIZE_MASK)
+ | (BUF_SIZE_16KiB & TDES2_BUFFER1_SIZE_MASK);
+ } else {
+ p->des2 |= (len & TDES2_BUFFER1_SIZE_MASK);
+ }
+
+ if (is_fs)
+ tdes3 |= TDES3_FIRST_DESCRIPTOR;
+ else
+ tdes3 &= ~TDES3_FIRST_DESCRIPTOR;
+
+ if (likely(csum_flag))
+ tdes3 |= (TX_CIC_FULL << TDES3_CHECKSUM_INSERTION_SHIFT);
+ else
+ tdes3 &= ~(TX_CIC_FULL << TDES3_CHECKSUM_INSERTION_SHIFT);
+
+ if (ls)
+ tdes3 |= TDES3_LAST_DESCRIPTOR;
+ else
+ tdes3 &= ~TDES3_LAST_DESCRIPTOR;
+
+ /* Finally set the OWN bit. Later the DMA will start! */
+ if (tx_own)
+ tdes3 |= TDES3_OWN;
+
+ if (is_fs & tx_own)
+ /* When the own bit, for the first frame, has to be set, all
+ * descriptors for the same frame has to be set before, to
+ * avoid race condition.
+ */
+ wmb();
+
+ p->des3 = tdes3;
+}
+
+static void dwmac4_rd_prepare_tso_tx_desc(struct dma_desc *p, int is_fs,
+ int len1, int len2, bool tx_own,
+ bool ls, unsigned int tcphdrlen,
+ unsigned int tcppayloadlen)
+{
+ unsigned int tdes3 = p->des3;
+
+ if (len1)
+ p->des2 |= (len1 & TDES2_BUFFER1_SIZE_MASK);
+
+ if (len2)
+ p->des2 |= (len2 << TDES2_BUFFER2_SIZE_MASK_SHIFT)
+ & TDES2_BUFFER2_SIZE_MASK;
+
+ if (is_fs) {
+ tdes3 |= TDES3_FIRST_DESCRIPTOR |
+ TDES3_TCP_SEGMENTATION_ENABLE |
+ ((tcphdrlen << TDES3_HDR_LEN_SHIFT) &
+ TDES3_SLOT_NUMBER_MASK) |
+ ((tcppayloadlen & TDES3_TCP_PKT_PAYLOAD_MASK));
+ } else {
+ tdes3 &= ~TDES3_FIRST_DESCRIPTOR;
+ }
+
+ if (ls)
+ tdes3 |= TDES3_LAST_DESCRIPTOR;
+ else
+ tdes3 &= ~TDES3_LAST_DESCRIPTOR;
+
+ /* Finally set the OWN bit. Later the DMA will start! */
+ if (tx_own)
+ tdes3 |= TDES3_OWN;
+
+ if (is_fs & tx_own)
+ /* When the own bit, for the first frame, has to be set, all
+ * descriptors for the same frame has to be set before, to
+ * avoid race condition.
+ */
+ wmb();
+
+ p->des3 = tdes3;
+}
+
+static void dwmac4_release_tx_desc(struct dma_desc *p, int mode)
+{
+ p->des2 = 0;
+ p->des3 = 0;
+}
+
+static void dwmac4_rd_set_tx_ic(struct dma_desc *p)
+{
+ p->des2 |= TDES2_INTERRUPT_ON_COMPLETION;
+}
+
+static void dwmac4_display_ring(void *head, unsigned int size, bool rx)
+{
+ struct dma_desc *p = (struct dma_desc *)head;
+ int i;
+
+ pr_info("%s descriptor ring:\n", rx ? "RX" : "TX");
+
+ for (i = 0; i < size; i++) {
+ if (p->des0)
+ pr_info("%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n",
+ i, (unsigned int)virt_to_phys(p),
+ p->des0, p->des1, p->des2, p->des3);
+ p++;
+ }
+}
+
+static void dwmac4_set_mss_ctxt(struct dma_desc *p, unsigned int mss)
+{
+ p->des0 = 0;
+ p->des1 = 0;
+ p->des2 = mss;
+ p->des3 = TDES3_CONTEXT_TYPE | TDES3_CTXT_TCMSSV;
+}
+
+const struct stmmac_desc_ops dwmac4_desc_ops = {
+ .tx_status = dwmac4_wrback_get_tx_status,
+ .rx_status = dwmac4_wrback_get_rx_status,
+ .get_tx_len = dwmac4_rd_get_tx_len,
+ .get_tx_owner = dwmac4_get_tx_owner,
+ .set_tx_owner = dwmac4_set_tx_owner,
+ .set_rx_owner = dwmac4_set_rx_owner,
+ .get_tx_ls = dwmac4_get_tx_ls,
+ .get_rx_frame_len = dwmac4_wrback_get_rx_frame_len,
+ .enable_tx_timestamp = dwmac4_rd_enable_tx_timestamp,
+ .get_tx_timestamp_status = dwmac4_wrback_get_tx_timestamp_status,
+ .get_timestamp = dwmac4_wrback_get_timestamp,
+ .get_rx_timestamp_status = dwmac4_context_get_rx_timestamp_status,
+ .set_tx_ic = dwmac4_rd_set_tx_ic,
+ .prepare_tx_desc = dwmac4_rd_prepare_tx_desc,
+ .prepare_tso_tx_desc = dwmac4_rd_prepare_tso_tx_desc,
+ .release_tx_desc = dwmac4_release_tx_desc,
+ .init_rx_desc = dwmac4_rd_init_rx_desc,
+ .init_tx_desc = dwmac4_rd_init_tx_desc,
+ .display_ring = dwmac4_display_ring,
+ .set_mss = dwmac4_set_mss_ctxt,
+};
+
+const struct stmmac_mode_ops dwmac4_ring_mode_ops = { };
--- /dev/null
+/*
+ * Header File to describe the DMA descriptors and related definitions specific
+ * for DesignWare databook 4.xx.
+ *
+ * Copyright (C) 2015 STMicroelectronics Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * Author: Alexandre Torgue <alexandre.torgue@st.com>
+ */
+
+#ifndef __DWMAC4_DESCS_H__
+#define __DWMAC4_DESCS_H__
+
+#include <linux/bitops.h>
+
+/* Normal transmit descriptor defines (without split feature) */
+
+/* TDES2 (read format) */
+#define TDES2_BUFFER1_SIZE_MASK GENMASK(13, 0)
+#define TDES2_VLAN_TAG_MASK GENMASK(15, 14)
+#define TDES2_BUFFER2_SIZE_MASK GENMASK(29, 16)
+#define TDES2_BUFFER2_SIZE_MASK_SHIFT 16
+#define TDES2_TIMESTAMP_ENABLE BIT(30)
+#define TDES2_INTERRUPT_ON_COMPLETION BIT(31)
+
+/* TDES3 (read format) */
+#define TDES3_PACKET_SIZE_MASK GENMASK(14, 0)
+#define TDES3_CHECKSUM_INSERTION_MASK GENMASK(17, 16)
+#define TDES3_CHECKSUM_INSERTION_SHIFT 16
+#define TDES3_TCP_PKT_PAYLOAD_MASK GENMASK(17, 0)
+#define TDES3_TCP_SEGMENTATION_ENABLE BIT(18)
+#define TDES3_HDR_LEN_SHIFT 19
+#define TDES3_SLOT_NUMBER_MASK GENMASK(22, 19)
+#define TDES3_SA_INSERT_CTRL_MASK GENMASK(25, 23)
+#define TDES3_CRC_PAD_CTRL_MASK GENMASK(27, 26)
+
+/* TDES3 (write back format) */
+#define TDES3_IP_HDR_ERROR BIT(0)
+#define TDES3_DEFERRED BIT(1)
+#define TDES3_UNDERFLOW_ERROR BIT(2)
+#define TDES3_EXCESSIVE_DEFERRAL BIT(3)
+#define TDES3_COLLISION_COUNT_MASK GENMASK(7, 4)
+#define TDES3_COLLISION_COUNT_SHIFT 4
+#define TDES3_EXCESSIVE_COLLISION BIT(8)
+#define TDES3_LATE_COLLISION BIT(9)
+#define TDES3_NO_CARRIER BIT(10)
+#define TDES3_LOSS_CARRIER BIT(11)
+#define TDES3_PAYLOAD_ERROR BIT(12)
+#define TDES3_PACKET_FLUSHED BIT(13)
+#define TDES3_JABBER_TIMEOUT BIT(14)
+#define TDES3_ERROR_SUMMARY BIT(15)
+#define TDES3_TIMESTAMP_STATUS BIT(17)
+#define TDES3_TIMESTAMP_STATUS_SHIFT 17
+
+/* TDES3 context */
+#define TDES3_CTXT_TCMSSV BIT(26)
+
+/* TDES3 Common */
+#define TDES3_LAST_DESCRIPTOR BIT(28)
+#define TDES3_LAST_DESCRIPTOR_SHIFT 28
+#define TDES3_FIRST_DESCRIPTOR BIT(29)
+#define TDES3_CONTEXT_TYPE BIT(30)
+
+/* TDS3 use for both format (read and write back) */
+#define TDES3_OWN BIT(31)
+#define TDES3_OWN_SHIFT 31
+
+/* Normal receive descriptor defines (without split feature) */
+
+/* RDES0 (write back format) */
+#define RDES0_VLAN_TAG_MASK GENMASK(15, 0)
+
+/* RDES1 (write back format) */
+#define RDES1_IP_PAYLOAD_TYPE_MASK GENMASK(2, 0)
+#define RDES1_IP_HDR_ERROR BIT(3)
+#define RDES1_IPV4_HEADER BIT(4)
+#define RDES1_IPV6_HEADER BIT(5)
+#define RDES1_IP_CSUM_BYPASSED BIT(6)
+#define RDES1_IP_CSUM_ERROR BIT(7)
+#define RDES1_PTP_MSG_TYPE_MASK GENMASK(11, 8)
+#define RDES1_PTP_PACKET_TYPE BIT(12)
+#define RDES1_PTP_VER BIT(13)
+#define RDES1_TIMESTAMP_AVAILABLE BIT(14)
+#define RDES1_TIMESTAMP_AVAILABLE_SHIFT 14
+#define RDES1_TIMESTAMP_DROPPED BIT(15)
+#define RDES1_IP_TYPE1_CSUM_MASK GENMASK(31, 16)
+
+/* RDES2 (write back format) */
+#define RDES2_L3_L4_HEADER_SIZE_MASK GENMASK(9, 0)
+#define RDES2_VLAN_FILTER_STATUS BIT(15)
+#define RDES2_SA_FILTER_FAIL BIT(16)
+#define RDES2_DA_FILTER_FAIL BIT(17)
+#define RDES2_HASH_FILTER_STATUS BIT(18)
+#define RDES2_MAC_ADDR_MATCH_MASK GENMASK(26, 19)
+#define RDES2_HASH_VALUE_MATCH_MASK GENMASK(26, 19)
+#define RDES2_L3_FILTER_MATCH BIT(27)
+#define RDES2_L4_FILTER_MATCH BIT(28)
+#define RDES2_L3_L4_FILT_NB_MATCH_MASK GENMASK(27, 26)
+#define RDES2_L3_L4_FILT_NB_MATCH_SHIFT 26
+
+/* RDES3 (write back format) */
+#define RDES3_PACKET_SIZE_MASK GENMASK(14, 0)
+#define RDES3_ERROR_SUMMARY BIT(15)
+#define RDES3_PACKET_LEN_TYPE_MASK GENMASK(18, 16)
+#define RDES3_DRIBBLE_ERROR BIT(19)
+#define RDES3_RECEIVE_ERROR BIT(20)
+#define RDES3_OVERFLOW_ERROR BIT(21)
+#define RDES3_RECEIVE_WATCHDOG BIT(22)
+#define RDES3_GIANT_PACKET BIT(23)
+#define RDES3_CRC_ERROR BIT(24)
+#define RDES3_RDES0_VALID BIT(25)
+#define RDES3_RDES1_VALID BIT(26)
+#define RDES3_RDES2_VALID BIT(27)
+#define RDES3_LAST_DESCRIPTOR BIT(28)
+#define RDES3_FIRST_DESCRIPTOR BIT(29)
+#define RDES3_CONTEXT_DESCRIPTOR BIT(30)
+
+/* RDES3 (read format) */
+#define RDES3_BUFFER1_VALID_ADDR BIT(24)
+#define RDES3_BUFFER2_VALID_ADDR BIT(25)
+#define RDES3_INT_ON_COMPLETION_EN BIT(30)
+
+/* TDS3 use for both format (read and write back) */
+#define RDES3_OWN BIT(31)
+
+#endif /* __DWMAC4_DESCS_H__ */
projects / platform / kernel / linux-rpi3.git / commitdiff