1 files changed, 554 insertions, 0 deletions

diff --git a/drivers/net/ethernet/freescale/enetc/enetc.h b/drivers/net/ethernet/freescale/enetc/enetc.h
new file mode 100644
index 000000000..c6d8cc15c
--- /dev/null
+++ b/drivers/net/ethernet/freescale/enetc/enetc.h
@@ -0,0 +1,554 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
+/* Copyright 2017-2019 NXP */
+
+#include <linux/timer.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/dma-mapping.h>
+#include <linux/skbuff.h>
+#include <linux/ethtool.h>
+#include <linux/if_vlan.h>
+#include <linux/phylink.h>
+#include <linux/dim.h>
+
+#include "enetc_hw.h"
+
+#define ENETC_MAC_MAXFRM_SIZE	9600
+#define ENETC_MAX_MTU		(ENETC_MAC_MAXFRM_SIZE - \
+				(ETH_FCS_LEN + ETH_HLEN + VLAN_HLEN))
+
+#define ENETC_CBD_DATA_MEM_ALIGN 64
+
+struct enetc_tx_swbd {
+	union {
+		struct sk_buff *skb;
+		struct xdp_frame *xdp_frame;
+	};
+	dma_addr_t dma;
+	struct page *page;	/* valid only if is_xdp_tx */
+	u16 page_offset;	/* valid only if is_xdp_tx */
+	u16 len;
+	enum dma_data_direction dir;
+	u8 is_dma_page:1;
+	u8 check_wb:1;
+	u8 do_twostep_tstamp:1;
+	u8 is_eof:1;
+	u8 is_xdp_tx:1;
+	u8 is_xdp_redirect:1;
+	u8 qbv_en:1;
+};
+
+#define ENETC_RX_MAXFRM_SIZE	ENETC_MAC_MAXFRM_SIZE
+#define ENETC_RXB_TRUESIZE	2048 /* PAGE_SIZE >> 1 */
+#define ENETC_RXB_PAD		NET_SKB_PAD /* add extra space if needed */
+#define ENETC_RXB_DMA_SIZE	\
+	(SKB_WITH_OVERHEAD(ENETC_RXB_TRUESIZE) - ENETC_RXB_PAD)
+#define ENETC_RXB_DMA_SIZE_XDP	\
+	(SKB_WITH_OVERHEAD(ENETC_RXB_TRUESIZE) - XDP_PACKET_HEADROOM)
+
+struct enetc_rx_swbd {
+	dma_addr_t dma;
+	struct page *page;
+	u16 page_offset;
+	enum dma_data_direction dir;
+	u16 len;
+};
+
+/* ENETC overhead: optional extension BD + 1 BD gap */
+#define ENETC_TXBDS_NEEDED(val)	((val) + 2)
+/* max # of chained Tx BDs is 15, including head and extension BD */
+#define ENETC_MAX_SKB_FRAGS	13
+#define ENETC_TXBDS_MAX_NEEDED	ENETC_TXBDS_NEEDED(ENETC_MAX_SKB_FRAGS + 1)
+
+struct enetc_ring_stats {
+	unsigned int packets;
+	unsigned int bytes;
+	unsigned int rx_alloc_errs;
+	unsigned int xdp_drops;
+	unsigned int xdp_tx;
+	unsigned int xdp_tx_drops;
+	unsigned int xdp_redirect;
+	unsigned int xdp_redirect_failures;
+	unsigned int xdp_redirect_sg;
+	unsigned int recycles;
+	unsigned int recycle_failures;
+	unsigned int win_drop;
+};
+
+struct enetc_xdp_data {
+	struct xdp_rxq_info rxq;
+	struct bpf_prog *prog;
+	int xdp_tx_in_flight;
+};
+
+#define ENETC_RX_RING_DEFAULT_SIZE	2048
+#define ENETC_TX_RING_DEFAULT_SIZE	2048
+#define ENETC_DEFAULT_TX_WORK		(ENETC_TX_RING_DEFAULT_SIZE / 2)
+
+struct enetc_bdr {
+	struct device *dev; /* for DMA mapping */
+	struct net_device *ndev;
+	void *bd_base; /* points to Rx or Tx BD ring */
+	union {
+		void __iomem *tpir;
+		void __iomem *rcir;
+	};
+	u16 index;
+	u16 prio;
+	int bd_count; /* # of BDs */
+	int next_to_use;
+	int next_to_clean;
+	union {
+		struct enetc_tx_swbd *tx_swbd;
+		struct enetc_rx_swbd *rx_swbd;
+	};
+	union {
+		void __iomem *tcir; /* Tx */
+		int next_to_alloc; /* Rx */
+	};
+	void __iomem *idr; /* Interrupt Detect Register pointer */
+
+	int buffer_offset;
+	struct enetc_xdp_data xdp;
+
+	struct enetc_ring_stats stats;
+
+	dma_addr_t bd_dma_base;
+	u8 tsd_enable; /* Time specific departure */
+	bool ext_en; /* enable h/w descriptor extensions */
+
+	/* DMA buffer for TSO headers */
+	char *tso_headers;
+	dma_addr_t tso_headers_dma;
+} ____cacheline_aligned_in_smp;
+
+static inline void enetc_bdr_idx_inc(struct enetc_bdr *bdr, int *i)
+{
+	if (unlikely(++*i == bdr->bd_count))
+		*i = 0;
+}
+
+static inline int enetc_bd_unused(struct enetc_bdr *bdr)
+{
+	if (bdr->next_to_clean > bdr->next_to_use)
+		return bdr->next_to_clean - bdr->next_to_use - 1;
+
+	return bdr->bd_count + bdr->next_to_clean - bdr->next_to_use - 1;
+}
+
+static inline int enetc_swbd_unused(struct enetc_bdr *bdr)
+{
+	if (bdr->next_to_clean > bdr->next_to_alloc)
+		return bdr->next_to_clean - bdr->next_to_alloc - 1;
+
+	return bdr->bd_count + bdr->next_to_clean - bdr->next_to_alloc - 1;
+}
+
+/* Control BD ring */
+#define ENETC_CBDR_DEFAULT_SIZE	64
+struct enetc_cbdr {
+	void *bd_base; /* points to Rx or Tx BD ring */
+	void __iomem *pir;
+	void __iomem *cir;
+	void __iomem *mr; /* mode register */
+
+	int bd_count; /* # of BDs */
+	int next_to_use;
+	int next_to_clean;
+
+	dma_addr_t bd_dma_base;
+	struct device *dma_dev;
+};
+
+#define ENETC_TXBD(BDR, i) (&(((union enetc_tx_bd *)((BDR).bd_base))[i]))
+
+static inline union enetc_rx_bd *enetc_rxbd(struct enetc_bdr *rx_ring, int i)
+{
+	int hw_idx = i;
+
+#ifdef CONFIG_FSL_ENETC_PTP_CLOCK
+	if (rx_ring->ext_en)
+		hw_idx = 2 * i;
+#endif
+	return &(((union enetc_rx_bd *)rx_ring->bd_base)[hw_idx]);
+}
+
+static inline void enetc_rxbd_next(struct enetc_bdr *rx_ring,
+				   union enetc_rx_bd **old_rxbd, int *old_index)
+{
+	union enetc_rx_bd *new_rxbd = *old_rxbd;
+	int new_index = *old_index;
+
+	new_rxbd++;
+
+#ifdef CONFIG_FSL_ENETC_PTP_CLOCK
+	if (rx_ring->ext_en)
+		new_rxbd++;
+#endif
+
+	if (unlikely(++new_index == rx_ring->bd_count)) {
+		new_rxbd = rx_ring->bd_base;
+		new_index = 0;
+	}
+
+	*old_rxbd = new_rxbd;
+	*old_index = new_index;
+}
+
+static inline union enetc_rx_bd *enetc_rxbd_ext(union enetc_rx_bd *rxbd)
+{
+	return ++rxbd;
+}
+
+struct enetc_msg_swbd {
+	void *vaddr;
+	dma_addr_t dma;
+	int size;
+};
+
+#define ENETC_REV1	0x1
+enum enetc_errata {
+	ENETC_ERR_VLAN_ISOL	= BIT(0),
+	ENETC_ERR_UCMCSWP	= BIT(1),
+};
+
+#define ENETC_SI_F_QBV BIT(0)
+#define ENETC_SI_F_PSFP BIT(1)
+
+/* PCI IEP device data */
+struct enetc_si {
+	struct pci_dev *pdev;
+	struct enetc_hw hw;
+	enum enetc_errata errata;
+
+	struct net_device *ndev; /* back ref. */
+
+	struct enetc_cbdr cbd_ring;
+
+	int num_rx_rings; /* how many rings are available in the SI */
+	int num_tx_rings;
+	int num_fs_entries;
+	int num_rss; /* number of RSS buckets */
+	unsigned short pad;
+	int hw_features;
+};
+
+#define ENETC_SI_ALIGN	32
+
+static inline void *enetc_si_priv(const struct enetc_si *si)
+{
+	return (char *)si + ALIGN(sizeof(struct enetc_si), ENETC_SI_ALIGN);
+}
+
+static inline bool enetc_si_is_pf(struct enetc_si *si)
+{
+	return !!(si->hw.port);
+}
+
+static inline int enetc_pf_to_port(struct pci_dev *pf_pdev)
+{
+	switch (pf_pdev->devfn) {
+	case 0:
+		return 0;
+	case 1:
+		return 1;
+	case 2:
+		return 2;
+	case 6:
+		return 3;
+	default:
+		return -1;
+	}
+}
+
+#define ENETC_MAX_NUM_TXQS	8
+#define ENETC_INT_NAME_MAX	(IFNAMSIZ + 8)
+
+struct enetc_int_vector {
+	void __iomem *rbier;
+	void __iomem *tbier_base;
+	void __iomem *ricr1;
+	unsigned long tx_rings_map;
+	int count_tx_rings;
+	u32 rx_ictt;
+	u16 comp_cnt;
+	bool rx_dim_en, rx_napi_work;
+	struct napi_struct napi ____cacheline_aligned_in_smp;
+	struct dim rx_dim ____cacheline_aligned_in_smp;
+	char name[ENETC_INT_NAME_MAX];
+
+	struct enetc_bdr rx_ring;
+	struct enetc_bdr tx_ring[];
+} ____cacheline_aligned_in_smp;
+
+struct enetc_cls_rule {
+	struct ethtool_rx_flow_spec fs;
+	int used;
+};
+
+#define ENETC_MAX_BDR_INT	2 /* fixed to max # of available cpus */
+struct psfp_cap {
+	u32 max_streamid;
+	u32 max_psfp_filter;
+	u32 max_psfp_gate;
+	u32 max_psfp_gatelist;
+	u32 max_psfp_meter;
+};
+
+#define ENETC_F_TX_TSTAMP_MASK	0xff
+/* TODO: more hardware offloads */
+enum enetc_active_offloads {
+	/* 8 bits reserved for TX timestamp types (hwtstamp_tx_types) */
+	ENETC_F_TX_TSTAMP		= BIT(0),
+	ENETC_F_TX_ONESTEP_SYNC_TSTAMP	= BIT(1),
+
+	ENETC_F_RX_TSTAMP		= BIT(8),
+	ENETC_F_QBV			= BIT(9),
+	ENETC_F_QCI			= BIT(10),
+};
+
+enum enetc_flags_bit {
+	ENETC_TX_ONESTEP_TSTAMP_IN_PROGRESS = 0,
+};
+
+/* interrupt coalescing modes */
+enum enetc_ic_mode {
+	/* one interrupt per frame */
+	ENETC_IC_NONE = 0,
+	/* activated when int coalescing time is set to a non-0 value */
+	ENETC_IC_RX_MANUAL = BIT(0),
+	ENETC_IC_TX_MANUAL = BIT(1),
+	/* use dynamic interrupt moderation */
+	ENETC_IC_RX_ADAPTIVE = BIT(2),
+};
+
+#define ENETC_RXIC_PKTTHR	min_t(u32, 256, ENETC_RX_RING_DEFAULT_SIZE / 2)
+#define ENETC_TXIC_PKTTHR	min_t(u32, 128, ENETC_TX_RING_DEFAULT_SIZE / 2)
+#define ENETC_TXIC_TIMETHR	enetc_usecs_to_cycles(600)
+
+struct enetc_ndev_priv {
+	struct net_device *ndev;
+	struct device *dev; /* dma-mapping device */
+	struct enetc_si *si;
+
+	int bdr_int_num; /* number of Rx/Tx ring interrupts */
+	struct enetc_int_vector *int_vector[ENETC_MAX_BDR_INT];
+	u16 num_rx_rings, num_tx_rings;
+	u16 rx_bd_count, tx_bd_count;
+
+	u16 msg_enable;
+	enum enetc_active_offloads active_offloads;
+
+	u32 speed; /* store speed for compare update pspeed */
+
+	struct enetc_bdr **xdp_tx_ring;
+	struct enetc_bdr *tx_ring[16];
+	struct enetc_bdr *rx_ring[16];
+
+	struct enetc_cls_rule *cls_rules;
+
+	struct psfp_cap psfp_cap;
+
+	struct phylink *phylink;
+	int ic_mode;
+	u32 tx_ictt;
+
+	struct bpf_prog *xdp_prog;
+
+	unsigned long flags;
+
+	struct work_struct	tx_onestep_tstamp;
+	struct sk_buff_head	tx_skbs;
+};
+
+/* Messaging */
+
+/* VF-PF set primary MAC address message format */
+struct enetc_msg_cmd_set_primary_mac {
+	struct enetc_msg_cmd_header header;
+	struct sockaddr mac;
+};
+
+#define ENETC_CBD(R, i)	(&(((struct enetc_cbd *)((R).bd_base))[i]))
+
+#define ENETC_CBDR_TIMEOUT	1000 /* usecs */
+
+/* PTP driver exports */
+extern int enetc_phc_index;
+
+/* SI common */
+int enetc_pci_probe(struct pci_dev *pdev, const char *name, int sizeof_priv);
+void enetc_pci_remove(struct pci_dev *pdev);
+int enetc_alloc_msix(struct enetc_ndev_priv *priv);
+void enetc_free_msix(struct enetc_ndev_priv *priv);
+void enetc_get_si_caps(struct enetc_si *si);
+void enetc_init_si_rings_params(struct enetc_ndev_priv *priv);
+int enetc_alloc_si_resources(struct enetc_ndev_priv *priv);
+void enetc_free_si_resources(struct enetc_ndev_priv *priv);
+int enetc_configure_si(struct enetc_ndev_priv *priv);
+
+int enetc_open(struct net_device *ndev);
+int enetc_close(struct net_device *ndev);
+void enetc_start(struct net_device *ndev);
+void enetc_stop(struct net_device *ndev);
+netdev_tx_t enetc_xmit(struct sk_buff *skb, struct net_device *ndev);
+struct net_device_stats *enetc_get_stats(struct net_device *ndev);
+void enetc_set_features(struct net_device *ndev, netdev_features_t features);
+int enetc_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd);
+int enetc_setup_tc_mqprio(struct net_device *ndev, void *type_data);
+int enetc_setup_bpf(struct net_device *dev, struct netdev_bpf *xdp);
+int enetc_xdp_xmit(struct net_device *ndev, int num_frames,
+		   struct xdp_frame **frames, u32 flags);
+
+/* ethtool */
+void enetc_set_ethtool_ops(struct net_device *ndev);
+
+/* control buffer descriptor ring (CBDR) */
+int enetc_setup_cbdr(struct device *dev, struct enetc_hw *hw, int bd_count,
+		     struct enetc_cbdr *cbdr);
+void enetc_teardown_cbdr(struct enetc_cbdr *cbdr);
+int enetc_set_mac_flt_entry(struct enetc_si *si, int index,
+			    char *mac_addr, int si_map);
+int enetc_clear_mac_flt_entry(struct enetc_si *si, int index);
+int enetc_set_fs_entry(struct enetc_si *si, struct enetc_cmd_rfse *rfse,
+		       int index);
+void enetc_set_rss_key(struct enetc_hw *hw, const u8 *bytes);
+int enetc_get_rss_table(struct enetc_si *si, u32 *table, int count);
+int enetc_set_rss_table(struct enetc_si *si, const u32 *table, int count);
+int enetc_send_cmd(struct enetc_si *si, struct enetc_cbd *cbd);
+
+static inline void *enetc_cbd_alloc_data_mem(struct enetc_si *si,
+					     struct enetc_cbd *cbd,
+					     int size, dma_addr_t *dma,
+					     void **data_align)
+{
+	struct enetc_cbdr *ring = &si->cbd_ring;
+	dma_addr_t dma_align;
+	void *data;
+
+	data = dma_alloc_coherent(ring->dma_dev,
+				  size + ENETC_CBD_DATA_MEM_ALIGN,
+				  dma, GFP_KERNEL);
+	if (!data) {
+		dev_err(ring->dma_dev, "CBD alloc data memory failed!\n");
+		return NULL;
+	}
+
+	dma_align = ALIGN(*dma, ENETC_CBD_DATA_MEM_ALIGN);
+	*data_align = PTR_ALIGN(data, ENETC_CBD_DATA_MEM_ALIGN);
+
+	cbd->addr[0] = cpu_to_le32(lower_32_bits(dma_align));
+	cbd->addr[1] = cpu_to_le32(upper_32_bits(dma_align));
+	cbd->length = cpu_to_le16(size);
+
+	return data;
+}
+
+static inline void enetc_cbd_free_data_mem(struct enetc_si *si, int size,
+					   void *data, dma_addr_t *dma)
+{
+	struct enetc_cbdr *ring = &si->cbd_ring;
+
+	dma_free_coherent(ring->dma_dev, size + ENETC_CBD_DATA_MEM_ALIGN,
+			  data, *dma);
+}
+
+void enetc_reset_ptcmsdur(struct enetc_hw *hw);
+void enetc_set_ptcmsdur(struct enetc_hw *hw, u32 *queue_max_sdu);
+
+#ifdef CONFIG_FSL_ENETC_QOS
+int enetc_qos_query_caps(struct net_device *ndev, void *type_data);
+int enetc_setup_tc_taprio(struct net_device *ndev, void *type_data);
+void enetc_sched_speed_set(struct enetc_ndev_priv *priv, int speed);
+int enetc_setup_tc_cbs(struct net_device *ndev, void *type_data);
+int enetc_setup_tc_txtime(struct net_device *ndev, void *type_data);
+int enetc_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
+			    void *cb_priv);
+int enetc_setup_tc_psfp(struct net_device *ndev, void *type_data);
+int enetc_psfp_init(struct enetc_ndev_priv *priv);
+int enetc_psfp_clean(struct enetc_ndev_priv *priv);
+int enetc_set_psfp(struct net_device *ndev, bool en);
+
+static inline void enetc_get_max_cap(struct enetc_ndev_priv *priv)
+{
+	struct enetc_hw *hw = &priv->si->hw;
+	u32 reg;
+
+	reg = enetc_port_rd(hw, ENETC_PSIDCAPR);
+	priv->psfp_cap.max_streamid = reg & ENETC_PSIDCAPR_MSK;
+	/* Port stream filter capability */
+	reg = enetc_port_rd(hw, ENETC_PSFCAPR);
+	priv->psfp_cap.max_psfp_filter = reg & ENETC_PSFCAPR_MSK;
+	/* Port stream gate capability */
+	reg = enetc_port_rd(hw, ENETC_PSGCAPR);
+	priv->psfp_cap.max_psfp_gate = (reg & ENETC_PSGCAPR_SGIT_MSK);
+	priv->psfp_cap.max_psfp_gatelist = (reg & ENETC_PSGCAPR_GCL_MSK) >> 16;
+	/* Port flow meter capability */
+	reg = enetc_port_rd(hw, ENETC_PFMCAPR);
+	priv->psfp_cap.max_psfp_meter = reg & ENETC_PFMCAPR_MSK;
+}
+
+static inline int enetc_psfp_enable(struct enetc_ndev_priv *priv)
+{
+	struct enetc_hw *hw = &priv->si->hw;
+	int err;
+
+	enetc_get_max_cap(priv);
+
+	err = enetc_psfp_init(priv);
+	if (err)
+		return err;
+
+	enetc_wr(hw, ENETC_PPSFPMR, enetc_rd(hw, ENETC_PPSFPMR) |
+		 ENETC_PPSFPMR_PSFPEN | ENETC_PPSFPMR_VS |
+		 ENETC_PPSFPMR_PVC | ENETC_PPSFPMR_PVZC);
+
+	return 0;
+}
+
+static inline int enetc_psfp_disable(struct enetc_ndev_priv *priv)
+{
+	struct enetc_hw *hw = &priv->si->hw;
+	int err;
+
+	err = enetc_psfp_clean(priv);
+	if (err)
+		return err;
+
+	enetc_wr(hw, ENETC_PPSFPMR, enetc_rd(hw, ENETC_PPSFPMR) &
+		 ~ENETC_PPSFPMR_PSFPEN & ~ENETC_PPSFPMR_VS &
+		 ~ENETC_PPSFPMR_PVC & ~ENETC_PPSFPMR_PVZC);
+
+	memset(&priv->psfp_cap, 0, sizeof(struct psfp_cap));
+
+	return 0;
+}
+
+#else
+#define enetc_qos_query_caps(ndev, type_data) -EOPNOTSUPP
+#define enetc_setup_tc_taprio(ndev, type_data) -EOPNOTSUPP
+#define enetc_sched_speed_set(priv, speed) (void)0
+#define enetc_setup_tc_cbs(ndev, type_data) -EOPNOTSUPP
+#define enetc_setup_tc_txtime(ndev, type_data) -EOPNOTSUPP
+#define enetc_setup_tc_psfp(ndev, type_data) -EOPNOTSUPP
+#define enetc_setup_tc_block_cb NULL
+
+#define enetc_get_max_cap(p)		\
+	memset(&((p)->psfp_cap), 0, sizeof(struct psfp_cap))
+
+static inline int enetc_psfp_enable(struct enetc_ndev_priv *priv)
+{
+	return 0;
+}
+
+static inline int enetc_psfp_disable(struct enetc_ndev_priv *priv)
+{
+	return 0;
+}
+
+static inline int enetc_set_psfp(struct net_device *ndev, bool en)
+{
+	return 0;
+}
+#endif