Imported Upstream version 16.04

Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

1 files changed, 450 insertions, 0 deletions

diff --git a/drivers/net/nfp/nfp_net_pmd.h b/drivers/net/nfp/nfp_net_pmd.h
new file mode 100644
index 00000000..232ce5ca
--- /dev/null
+++ b/drivers/net/nfp/nfp_net_pmd.h
@@ -0,0 +1,450 @@
+/*
+ * Copyright (c) 2014, 2015 Netronome Systems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *  this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *  notice, this list of conditions and the following disclaimer in the
+ *  documentation and/or other materials provided with the distribution
+ *
+ * 3. Neither the name of the copyright holder nor the names of its
+ *  contributors may be used to endorse or promote products derived from this
+ *  software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * vim:shiftwidth=8:noexpandtab
+ *
+ * @file dpdk/pmd/nfp_net_pmd.h
+ *
+ * Netronome NFP_NET PDM driver
+ */
+
+#ifndef _NFP_NET_PMD_H_
+#define _NFP_NET_PMD_H_
+
+#define NFP_NET_PMD_VERSION "0.1"
+#define PCI_VENDOR_ID_NETRONOME         0x19ee
+#define PCI_DEVICE_ID_NFP6000_PF_NIC    0x6000
+#define PCI_DEVICE_ID_NFP6000_VF_NIC    0x6003
+
+/* Forward declaration */
+struct nfp_net_adapter;
+
+/*
+ * The maximum number of descriptors is limited by design as
+ * DPDK uses uint16_t variables for these values
+ */
+#define NFP_NET_MAX_TX_DESC (32 * 1024)
+#define NFP_NET_MIN_TX_DESC 64
+
+#define NFP_NET_MAX_RX_DESC (32 * 1024)
+#define NFP_NET_MIN_RX_DESC 64
+
+/* Bar allocation */
+#define NFP_NET_CRTL_BAR        0
+#define NFP_NET_TX_BAR          2
+#define NFP_NET_RX_BAR          2
+
+/* Macros for accessing the Queue Controller Peripheral 'CSRs' */
+#define NFP_QCP_QUEUE_OFF(_x)                 ((_x) * 0x800)
+#define NFP_QCP_QUEUE_ADD_RPTR                  0x0000
+#define NFP_QCP_QUEUE_ADD_WPTR                  0x0004
+#define NFP_QCP_QUEUE_STS_LO                    0x0008
+#define NFP_QCP_QUEUE_STS_LO_READPTR_mask     (0x3ffff)
+#define NFP_QCP_QUEUE_STS_HI                    0x000c
+#define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask    (0x3ffff)
+
+/* Interrupt definitions */
+#define NFP_NET_IRQ_LSC_IDX             0
+
+/* Default values for RX/TX configuration */
+#define DEFAULT_RX_FREE_THRESH  32
+#define DEFAULT_RX_PTHRESH      8
+#define DEFAULT_RX_HTHRESH      8
+#define DEFAULT_RX_WTHRESH      0
+
+#define DEFAULT_TX_RS_THRESH	32
+#define DEFAULT_TX_FREE_THRESH  32
+#define DEFAULT_TX_PTHRESH      32
+#define DEFAULT_TX_HTHRESH      0
+#define DEFAULT_TX_WTHRESH      0
+#define DEFAULT_TX_RSBIT_THRESH 32
+
+/* Alignment for dma zones */
+#define NFP_MEMZONE_ALIGN	128
+
+/*
+ * This is used by the reconfig protocol. It sets the maximum time waiting in
+ * milliseconds before a reconfig timeout happens.
+ */
+#define NFP_NET_POLL_TIMEOUT    5000
+
+#define NFP_QCP_QUEUE_ADDR_SZ   (0x800)
+
+#define NFP_NET_LINK_DOWN_CHECK_TIMEOUT 4000 /* ms */
+#define NFP_NET_LINK_UP_CHECK_TIMEOUT   1000 /* ms */
+
+/* Version number helper defines */
+#define NFD_CFG_CLASS_VER_msk       0xff
+#define NFD_CFG_CLASS_VER_shf       24
+#define NFD_CFG_CLASS_VER(x)        (((x) & 0xff) << 24)
+#define NFD_CFG_CLASS_VER_of(x)     (((x) >> 24) & 0xff)
+#define NFD_CFG_CLASS_TYPE_msk      0xff
+#define NFD_CFG_CLASS_TYPE_shf      16
+#define NFD_CFG_CLASS_TYPE(x)       (((x) & 0xff) << 16)
+#define NFD_CFG_CLASS_TYPE_of(x)    (((x) >> 16) & 0xff)
+#define NFD_CFG_MAJOR_VERSION_msk   0xff
+#define NFD_CFG_MAJOR_VERSION_shf   8
+#define NFD_CFG_MAJOR_VERSION(x)    (((x) & 0xff) << 8)
+#define NFD_CFG_MAJOR_VERSION_of(x) (((x) >> 8) & 0xff)
+#define NFD_CFG_MINOR_VERSION_msk   0xff
+#define NFD_CFG_MINOR_VERSION_shf   0
+#define NFD_CFG_MINOR_VERSION(x)    (((x) & 0xff) << 0)
+#define NFD_CFG_MINOR_VERSION_of(x) (((x) >> 0) & 0xff)
+
+#include <linux/types.h>
+
+static inline uint8_t nn_readb(volatile const void *addr)
+{
+	return *((volatile const uint8_t *)(addr));
+}
+
+static inline void nn_writeb(uint8_t val, volatile void *addr)
+{
+	*((volatile uint8_t *)(addr)) = val;
+}
+
+static inline uint32_t nn_readl(volatile const void *addr)
+{
+	return *((volatile const uint32_t *)(addr));
+}
+
+static inline void nn_writel(uint32_t val, volatile void *addr)
+{
+	*((volatile uint32_t *)(addr)) = val;
+}
+
+static inline uint64_t nn_readq(volatile void *addr)
+{
+	const volatile uint32_t *p = addr;
+	uint32_t low, high;
+
+	high = nn_readl((volatile const void *)(p + 1));
+	low = nn_readl((volatile const void *)p);
+
+	return low + ((uint64_t)high << 32);
+}
+
+static inline void nn_writeq(uint64_t val, volatile void *addr)
+{
+	nn_writel(val >> 32, (volatile char *)addr + 4);
+	nn_writel(val, addr);
+}
+
+/* TX descriptor format */
+#define PCIE_DESC_TX_EOP                (1 << 7)
+#define PCIE_DESC_TX_OFFSET_MASK        (0x7f)
+
+/* Flags in the host TX descriptor */
+#define PCIE_DESC_TX_CSUM               (1 << 7)
+#define PCIE_DESC_TX_IP4_CSUM           (1 << 6)
+#define PCIE_DESC_TX_TCP_CSUM           (1 << 5)
+#define PCIE_DESC_TX_UDP_CSUM           (1 << 4)
+#define PCIE_DESC_TX_VLAN               (1 << 3)
+#define PCIE_DESC_TX_LSO                (1 << 2)
+#define PCIE_DESC_TX_ENCAP_NONE         (0)
+#define PCIE_DESC_TX_ENCAP_VXLAN        (1 << 1)
+#define PCIE_DESC_TX_ENCAP_GRE          (1 << 0)
+
+struct nfp_net_tx_desc {
+	union {
+		struct {
+			uint8_t dma_addr_hi;   /* High bits of host buf address */
+			__le16 dma_len;     /* Length to DMA for this desc */
+			uint8_t offset_eop;    /* Offset in buf where pkt starts +
+					     * highest bit is eop flag.
+					     */
+			__le32 dma_addr_lo; /* Low 32bit of host buf addr */
+
+			__le16 lso;         /* MSS to be used for LSO */
+			uint8_t l4_offset;     /* LSO, where the L4 data starts */
+			uint8_t flags;         /* TX Flags, see @PCIE_DESC_TX_* */
+
+			__le16 vlan;        /* VLAN tag to add if indicated */
+			__le16 data_len;    /* Length of frame + meta data */
+		} __attribute__((__packed__));
+		__le32 vals[4];
+	};
+};
+
+struct nfp_net_txq {
+	struct nfp_net_hw *hw; /* Backpointer to nfp_net structure */
+
+	/*
+	 * Queue information: @qidx is the queue index from Linux's
+	 * perspective.  @tx_qcidx is the index of the Queue
+	 * Controller Peripheral queue relative to the TX queue BAR.
+	 * @cnt is the size of the queue in number of
+	 * descriptors. @qcp_q is a pointer to the base of the queue
+	 * structure on the NFP
+	 */
+	uint8_t *qcp_q;
+
+	/*
+	 * Read and Write pointers.  @wr_p and @rd_p are host side pointer,
+	 * they are free running and have little relation to the QCP pointers *
+	 * @qcp_rd_p is a local copy queue controller peripheral read pointer
+	 */
+
+	uint32_t wr_p;
+	uint32_t rd_p;
+	uint32_t qcp_rd_p;
+
+	uint32_t tx_count;
+
+	uint32_t tx_free_thresh;
+	uint32_t tail;
+
+	/*
+	 * For each descriptor keep a reference to the mbuff and
+	 * DMA address used until completion is signalled.
+	 */
+	struct {
+		struct rte_mbuf *mbuf;
+	} *txbufs;
+
+	/*
+	 * Information about the host side queue location. @txds is
+	 * the virtual address for the queue, @dma is the DMA address
+	 * of the queue and @size is the size in bytes for the queue
+	 * (needed for free)
+	 */
+	struct nfp_net_tx_desc *txds;
+
+	/*
+	 * At this point 56 bytes have been used for all the fields in the
+	 * TX critical path. We have room for 8 bytes and still all placed
+	 * in a cache line. We are not using the threshold values below nor
+	 * the txq_flags but if we need to, we can add the most used in the
+	 * remaining bytes.
+	 */
+	uint32_t tx_rs_thresh; /* not used by now. Future? */
+	uint32_t tx_pthresh;   /* not used by now. Future? */
+	uint32_t tx_hthresh;   /* not used by now. Future? */
+	uint32_t tx_wthresh;   /* not used by now. Future? */
+	uint32_t txq_flags;    /* not used by now. Future? */
+	uint8_t  port_id;
+	int qidx;
+	int tx_qcidx;
+	__le64 dma;
+} __attribute__ ((__aligned__(64)));
+
+/* RX and freelist descriptor format */
+#define PCIE_DESC_RX_DD                 (1 << 7)
+#define PCIE_DESC_RX_META_LEN_MASK      (0x7f)
+
+/* Flags in the RX descriptor */
+#define PCIE_DESC_RX_RSS                (1 << 15)
+#define PCIE_DESC_RX_I_IP4_CSUM         (1 << 14)
+#define PCIE_DESC_RX_I_IP4_CSUM_OK      (1 << 13)
+#define PCIE_DESC_RX_I_TCP_CSUM         (1 << 12)
+#define PCIE_DESC_RX_I_TCP_CSUM_OK      (1 << 11)
+#define PCIE_DESC_RX_I_UDP_CSUM         (1 << 10)
+#define PCIE_DESC_RX_I_UDP_CSUM_OK      (1 <<  9)
+#define PCIE_DESC_RX_INGRESS_PORT       (1 <<  8)
+#define PCIE_DESC_RX_EOP                (1 <<  7)
+#define PCIE_DESC_RX_IP4_CSUM           (1 <<  6)
+#define PCIE_DESC_RX_IP4_CSUM_OK        (1 <<  5)
+#define PCIE_DESC_RX_TCP_CSUM           (1 <<  4)
+#define PCIE_DESC_RX_TCP_CSUM_OK        (1 <<  3)
+#define PCIE_DESC_RX_UDP_CSUM           (1 <<  2)
+#define PCIE_DESC_RX_UDP_CSUM_OK        (1 <<  1)
+#define PCIE_DESC_RX_VLAN               (1 <<  0)
+
+struct nfp_net_rx_desc {
+	union {
+		/* Freelist descriptor */
+		struct {
+			uint8_t dma_addr_hi;
+			__le16 spare;
+			uint8_t dd;
+
+			__le32 dma_addr_lo;
+		} __attribute__((__packed__)) fld;
+
+		/* RX descriptor */
+		struct {
+			__le16 data_len;
+			uint8_t reserved;
+			uint8_t meta_len_dd;
+
+			__le16 flags;
+			__le16 vlan;
+		} __attribute__((__packed__)) rxd;
+
+		__le32 vals[2];
+	};
+};
+
+struct nfp_net_rx_buff {
+	struct rte_mbuf *mbuf;
+};
+
+struct nfp_net_rxq {
+	struct nfp_net_hw *hw;	/* Backpointer to nfp_net structure */
+
+	 /*
+	  * @qcp_fl and @qcp_rx are pointers to the base addresses of the
+	  * freelist and RX queue controller peripheral queue structures on the
+	  * NFP
+	  */
+	uint8_t *qcp_fl;
+	uint8_t *qcp_rx;
+
+	/*
+	 * Read and Write pointers.  @wr_p and @rd_p are host side
+	 * pointer, they are free running and have little relation to
+	 * the QCP pointers. @wr_p is where the driver adds new
+	 * freelist descriptors and @rd_p is where the driver start
+	 * reading descriptors for newly arrive packets from.
+	 */
+	uint32_t wr_p;
+	uint32_t rd_p;
+
+	/*
+	 * For each buffer placed on the freelist, record the
+	 * associated SKB
+	 */
+	struct nfp_net_rx_buff *rxbufs;
+
+	/*
+	 * Information about the host side queue location.  @rxds is
+	 * the virtual address for the queue
+	 */
+	struct nfp_net_rx_desc *rxds;
+
+	/*
+	 * The mempool is created by the user specifying a mbuf size.
+	 * We save here the reference of the mempool needed in the RX
+	 * path and the mbuf size for checking received packets can be
+	 * safely copied to the mbuf using the NFP_NET_RX_OFFSET
+	 */
+	struct rte_mempool *mem_pool;
+	uint16_t mbuf_size;
+
+	/*
+	 * Next two fields are used for giving more free descriptors
+	 * to the NFP
+	 */
+	uint16_t rx_free_thresh;
+	uint16_t nb_rx_hold;
+
+	 /* the size of the queue in number of descriptors */
+	uint16_t rx_count;
+
+	/*
+	 * Fields above this point fit in a single cache line and are all used
+	 * in the RX critical path. Fields below this point are just used
+	 * during queue configuration or not used at all (yet)
+	 */
+
+	/* referencing dev->data->port_id */
+	uint16_t port_id;
+
+	uint8_t  crc_len; /* Not used by now */
+	uint8_t  drop_en; /* Not used by now */
+
+	/* DMA address of the queue */
+	__le64 dma;
+
+	/*
+	 * Queue information: @qidx is the queue index from Linux's
+	 * perspective.  @fl_qcidx is the index of the Queue
+	 * Controller peripheral queue relative to the RX queue BAR
+	 * used for the freelist and @rx_qcidx is the Queue Controller
+	 * Peripheral index for the RX queue.
+	 */
+	int qidx;
+	int fl_qcidx;
+	int rx_qcidx;
+} __attribute__ ((__aligned__(64)));
+
+struct nfp_net_hw {
+	/* Info from the firmware */
+	uint32_t ver;
+	uint32_t cap;
+	uint32_t max_mtu;
+	uint32_t mtu;
+	uint32_t rx_offset;
+
+	/* Current values for control */
+	uint32_t ctrl;
+
+	uint8_t *ctrl_bar;
+	uint8_t *tx_bar;
+	uint8_t *rx_bar;
+
+	int stride_rx;
+	int stride_tx;
+
+	uint8_t *qcp_cfg;
+
+	uint32_t max_tx_queues;
+	uint32_t max_rx_queues;
+	uint16_t flbufsz;
+	uint16_t device_id;
+	uint16_t vendor_id;
+	uint16_t subsystem_device_id;
+	uint16_t subsystem_vendor_id;
+#if defined(DSTQ_SELECTION)
+#if DSTQ_SELECTION
+	uint16_t device_function;
+#endif
+#endif
+
+	uint8_t mac_addr[ETHER_ADDR_LEN];
+
+	/* Records starting point for counters */
+	struct rte_eth_stats eth_stats_base;
+
+#ifdef NFP_NET_LIBNFP
+	struct nfp_cpp *cpp;
+	struct nfp_cpp_area *ctrl_area;
+	struct nfp_cpp_area *tx_area;
+	struct nfp_cpp_area *rx_area;
+	struct nfp_cpp_area *msix_area;
+#endif
+};
+
+struct nfp_net_adapter {
+	struct nfp_net_hw hw;
+};
+
+#define NFP_NET_DEV_PRIVATE_TO_HW(adapter)\
+	(&((struct nfp_net_adapter *)adapter)->hw)
+
+#endif /* _NFP_NET_PMD_H_ */
+/*
+ * Local variables:
+ * c-file-style: "Linux"
+ * indent-tabs-mode: t
+ * End:
+ */