rocker: introduce rocker switch driver
authorJiri Pirko <jiri@resnulli.us>
Fri, 28 Nov 2014 13:34:26 +0000 (14:34 +0100)
committerDavid S. Miller <davem@davemloft.net>
Wed, 3 Dec 2014 04:01:24 +0000 (20:01 -0800)
This patch introduces the first driver to benefit from the switchdev
infrastructure and to implement newly introduced switch ndos. This is a
driver for emulated switch chip implemented in qemu:
https://github.com/sfeldma/qemu-rocker/

This patch is a result of joint work with Scott Feldman.

Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Reviewed-by: Thomas Graf <tgraf@suug.ch>
Reviewed-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
MAINTAINERS
drivers/net/ethernet/Kconfig
drivers/net/ethernet/Makefile
drivers/net/ethernet/rocker/Kconfig [new file with mode: 0644]
drivers/net/ethernet/rocker/Makefile [new file with mode: 0644]
drivers/net/ethernet/rocker/rocker.c [new file with mode: 0644]
drivers/net/ethernet/rocker/rocker.h [new file with mode: 0644]

index 3aba0ac2d5a3b0d97eaca26f90d00e091f46c8e8..c95153559ed2073ebbb96f895dd15dd02c729dfb 100644 (file)
@@ -7865,6 +7865,13 @@ F:       drivers/hid/hid-roccat*
 F:     include/linux/hid-roccat*
 F:     Documentation/ABI/*/sysfs-driver-hid-roccat*
 
+ROCKER DRIVER
+M:     Jiri Pirko <jiri@resnulli.us>
+M:     Scott Feldman <sfeldma@gmail.com>
+L:     netdev@vger.kernel.org
+S:     Supported
+F:     drivers/net/ethernet/rocker/
+
 ROCKETPORT DRIVER
 P:     Comtrol Corp.
 W:     http://www.comtrol.com
index 1ed1fbba5d58140912258d80bf8279bb9a2686a1..df76050d0a9d26dc5a5b106a0ac44a18d84441b9 100644 (file)
@@ -155,6 +155,7 @@ source "drivers/net/ethernet/qualcomm/Kconfig"
 source "drivers/net/ethernet/realtek/Kconfig"
 source "drivers/net/ethernet/renesas/Kconfig"
 source "drivers/net/ethernet/rdc/Kconfig"
+source "drivers/net/ethernet/rocker/Kconfig"
 
 config S6GMAC
        tristate "S6105 GMAC ethernet support"
index 6e0b629e9859a85b13d82ce3b0d9fb6a7eece3e3..bf56f8b36e90cbb2fcef22627fadff0041fef897 100644 (file)
@@ -65,6 +65,7 @@ obj-$(CONFIG_NET_VENDOR_QUALCOMM) += qualcomm/
 obj-$(CONFIG_NET_VENDOR_REALTEK) += realtek/
 obj-$(CONFIG_SH_ETH) += renesas/
 obj-$(CONFIG_NET_VENDOR_RDC) += rdc/
+obj-$(CONFIG_NET_VENDOR_ROCKER) += rocker/
 obj-$(CONFIG_S6GMAC) += s6gmac.o
 obj-$(CONFIG_NET_VENDOR_SAMSUNG) += samsung/
 obj-$(CONFIG_NET_VENDOR_SEEQ) += seeq/
diff --git a/drivers/net/ethernet/rocker/Kconfig b/drivers/net/ethernet/rocker/Kconfig
new file mode 100644 (file)
index 0000000..11a850e
--- /dev/null
@@ -0,0 +1,27 @@
+#
+# Rocker device configuration
+#
+
+config NET_VENDOR_ROCKER
+       bool "Rocker devices"
+       default y
+       ---help---
+         If you have a network device belonging to this class, say Y.
+
+         Note that the answer to this question doesn't directly affect the
+         kernel: saying N will just cause the configurator to skip all
+         the questions about Rocker devices. If you say Y, you will be asked for
+         your specific card in the following questions.
+
+if NET_VENDOR_ROCKER
+
+config ROCKER
+       tristate "Rocker switch driver (EXPERIMENTAL)"
+       depends on PCI && NET_SWITCHDEV
+       ---help---
+         This driver supports Rocker switch device.
+
+         To compile this driver as a module, choose M here: the
+         module will be called rocker.
+
+endif # NET_VENDOR_ROCKER
diff --git a/drivers/net/ethernet/rocker/Makefile b/drivers/net/ethernet/rocker/Makefile
new file mode 100644 (file)
index 0000000..f85fb12
--- /dev/null
@@ -0,0 +1,5 @@
+#
+# Makefile for the Rocker network device drivers.
+#
+
+obj-$(CONFIG_ROCKER) += rocker.o
diff --git a/drivers/net/ethernet/rocker/rocker.c b/drivers/net/ethernet/rocker/rocker.c
new file mode 100644 (file)
index 0000000..a53011c
--- /dev/null
@@ -0,0 +1,2060 @@
+/*
+ * drivers/net/ethernet/rocker/rocker.c - Rocker switch device driver
+ * Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
+ * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/spinlock.h>
+#include <linux/crc32.h>
+#include <linux/sort.h>
+#include <linux/random.h>
+#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
+#include <linux/skbuff.h>
+#include <linux/socket.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <net/switchdev.h>
+#include <net/rtnetlink.h>
+#include <asm-generic/io-64-nonatomic-lo-hi.h>
+#include <generated/utsrelease.h>
+
+#include "rocker.h"
+
+static const char rocker_driver_name[] = "rocker";
+
+static const struct pci_device_id rocker_pci_id_table[] = {
+       {PCI_VDEVICE(REDHAT, PCI_DEVICE_ID_REDHAT_ROCKER), 0},
+       {0, }
+};
+
+struct rocker_desc_info {
+       char *data; /* mapped */
+       size_t data_size;
+       size_t tlv_size;
+       struct rocker_desc *desc;
+       DEFINE_DMA_UNMAP_ADDR(mapaddr);
+};
+
+struct rocker_dma_ring_info {
+       size_t size;
+       u32 head;
+       u32 tail;
+       struct rocker_desc *desc; /* mapped */
+       dma_addr_t mapaddr;
+       struct rocker_desc_info *desc_info;
+       unsigned int type;
+};
+
+struct rocker;
+
+struct rocker_port {
+       struct net_device *dev;
+       struct rocker *rocker;
+       unsigned int port_number;
+       u32 lport;
+       struct napi_struct napi_tx;
+       struct napi_struct napi_rx;
+       struct rocker_dma_ring_info tx_ring;
+       struct rocker_dma_ring_info rx_ring;
+};
+
+struct rocker {
+       struct pci_dev *pdev;
+       u8 __iomem *hw_addr;
+       struct msix_entry *msix_entries;
+       unsigned int port_count;
+       struct rocker_port **ports;
+       struct {
+               u64 id;
+       } hw;
+       spinlock_t cmd_ring_lock;
+       struct rocker_dma_ring_info cmd_ring;
+       struct rocker_dma_ring_info event_ring;
+};
+
+struct rocker_wait {
+       wait_queue_head_t wait;
+       bool done;
+       bool nowait;
+};
+
+static void rocker_wait_reset(struct rocker_wait *wait)
+{
+       wait->done = false;
+       wait->nowait = false;
+}
+
+static void rocker_wait_init(struct rocker_wait *wait)
+{
+       init_waitqueue_head(&wait->wait);
+       rocker_wait_reset(wait);
+}
+
+static struct rocker_wait *rocker_wait_create(gfp_t gfp)
+{
+       struct rocker_wait *wait;
+
+       wait = kmalloc(sizeof(*wait), gfp);
+       if (!wait)
+               return NULL;
+       rocker_wait_init(wait);
+       return wait;
+}
+
+static void rocker_wait_destroy(struct rocker_wait *work)
+{
+       kfree(work);
+}
+
+static bool rocker_wait_event_timeout(struct rocker_wait *wait,
+                                     unsigned long timeout)
+{
+       wait_event_timeout(wait->wait, wait->done, HZ / 10);
+       if (!wait->done)
+               return false;
+       return true;
+}
+
+static void rocker_wait_wake_up(struct rocker_wait *wait)
+{
+       wait->done = true;
+       wake_up(&wait->wait);
+}
+
+static u32 rocker_msix_vector(struct rocker *rocker, unsigned int vector)
+{
+       return rocker->msix_entries[vector].vector;
+}
+
+static u32 rocker_msix_tx_vector(struct rocker_port *rocker_port)
+{
+       return rocker_msix_vector(rocker_port->rocker,
+                                 ROCKER_MSIX_VEC_TX(rocker_port->port_number));
+}
+
+static u32 rocker_msix_rx_vector(struct rocker_port *rocker_port)
+{
+       return rocker_msix_vector(rocker_port->rocker,
+                                 ROCKER_MSIX_VEC_RX(rocker_port->port_number));
+}
+
+#define rocker_write32(rocker, reg, val)       \
+       writel((val), (rocker)->hw_addr + (ROCKER_ ## reg))
+#define rocker_read32(rocker, reg)     \
+       readl((rocker)->hw_addr + (ROCKER_ ## reg))
+#define rocker_write64(rocker, reg, val)       \
+       writeq((val), (rocker)->hw_addr + (ROCKER_ ## reg))
+#define rocker_read64(rocker, reg)     \
+       readq((rocker)->hw_addr + (ROCKER_ ## reg))
+
+/*****************************
+ * HW basic testing functions
+ *****************************/
+
+static int rocker_reg_test(struct rocker *rocker)
+{
+       struct pci_dev *pdev = rocker->pdev;
+       u64 test_reg;
+       u64 rnd;
+
+       rnd = prandom_u32();
+       rnd >>= 1;
+       rocker_write32(rocker, TEST_REG, rnd);
+       test_reg = rocker_read32(rocker, TEST_REG);
+       if (test_reg != rnd * 2) {
+               dev_err(&pdev->dev, "unexpected 32bit register value %08llx, expected %08llx\n",
+                       test_reg, rnd * 2);
+               return -EIO;
+       }
+
+       rnd = prandom_u32();
+       rnd <<= 31;
+       rnd |= prandom_u32();
+       rocker_write64(rocker, TEST_REG64, rnd);
+       test_reg = rocker_read64(rocker, TEST_REG64);
+       if (test_reg != rnd * 2) {
+               dev_err(&pdev->dev, "unexpected 64bit register value %16llx, expected %16llx\n",
+                       test_reg, rnd * 2);
+               return -EIO;
+       }
+
+       return 0;
+}
+
+static int rocker_dma_test_one(struct rocker *rocker, struct rocker_wait *wait,
+                              u32 test_type, dma_addr_t dma_handle,
+                              unsigned char *buf, unsigned char *expect,
+                              size_t size)
+{
+       struct pci_dev *pdev = rocker->pdev;
+       int i;
+
+       rocker_wait_reset(wait);
+       rocker_write32(rocker, TEST_DMA_CTRL, test_type);
+
+       if (!rocker_wait_event_timeout(wait, HZ / 10)) {
+               dev_err(&pdev->dev, "no interrupt received within a timeout\n");
+               return -EIO;
+       }
+
+       for (i = 0; i < size; i++) {
+               if (buf[i] != expect[i]) {
+                       dev_err(&pdev->dev, "unexpected memory content %02x at byte %x\n, %02x expected",
+                               buf[i], i, expect[i]);
+                       return -EIO;
+               }
+       }
+       return 0;
+}
+
+#define ROCKER_TEST_DMA_BUF_SIZE (PAGE_SIZE * 4)
+#define ROCKER_TEST_DMA_FILL_PATTERN 0x96
+
+static int rocker_dma_test_offset(struct rocker *rocker,
+                                 struct rocker_wait *wait, int offset)
+{
+       struct pci_dev *pdev = rocker->pdev;
+       unsigned char *alloc;
+       unsigned char *buf;
+       unsigned char *expect;
+       dma_addr_t dma_handle;
+       int i;
+       int err;
+
+       alloc = kzalloc(ROCKER_TEST_DMA_BUF_SIZE * 2 + offset,
+                       GFP_KERNEL | GFP_DMA);
+       if (!alloc)
+               return -ENOMEM;
+       buf = alloc + offset;
+       expect = buf + ROCKER_TEST_DMA_BUF_SIZE;
+
+       dma_handle = pci_map_single(pdev, buf, ROCKER_TEST_DMA_BUF_SIZE,
+                                   PCI_DMA_BIDIRECTIONAL);
+       if (pci_dma_mapping_error(pdev, dma_handle)) {
+               err = -EIO;
+               goto free_alloc;
+       }
+
+       rocker_write64(rocker, TEST_DMA_ADDR, dma_handle);
+       rocker_write32(rocker, TEST_DMA_SIZE, ROCKER_TEST_DMA_BUF_SIZE);
+
+       memset(expect, ROCKER_TEST_DMA_FILL_PATTERN, ROCKER_TEST_DMA_BUF_SIZE);
+       err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_FILL,
+                                 dma_handle, buf, expect,
+                                 ROCKER_TEST_DMA_BUF_SIZE);
+       if (err)
+               goto unmap;
+
+       memset(expect, 0, ROCKER_TEST_DMA_BUF_SIZE);
+       err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_CLEAR,
+                                 dma_handle, buf, expect,
+                                 ROCKER_TEST_DMA_BUF_SIZE);
+       if (err)
+               goto unmap;
+
+       prandom_bytes(buf, ROCKER_TEST_DMA_BUF_SIZE);
+       for (i = 0; i < ROCKER_TEST_DMA_BUF_SIZE; i++)
+               expect[i] = ~buf[i];
+       err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_INVERT,
+                                 dma_handle, buf, expect,
+                                 ROCKER_TEST_DMA_BUF_SIZE);
+       if (err)
+               goto unmap;
+
+unmap:
+       pci_unmap_single(pdev, dma_handle, ROCKER_TEST_DMA_BUF_SIZE,
+                        PCI_DMA_BIDIRECTIONAL);
+free_alloc:
+       kfree(alloc);
+
+       return err;
+}
+
+static int rocker_dma_test(struct rocker *rocker, struct rocker_wait *wait)
+{
+       int i;
+       int err;
+
+       for (i = 0; i < 8; i++) {
+               err = rocker_dma_test_offset(rocker, wait, i);
+               if (err)
+                       return err;
+       }
+       return 0;
+}
+
+static irqreturn_t rocker_test_irq_handler(int irq, void *dev_id)
+{
+       struct rocker_wait *wait = dev_id;
+
+       rocker_wait_wake_up(wait);
+
+       return IRQ_HANDLED;
+}
+
+static int rocker_basic_hw_test(struct rocker *rocker)
+{
+       struct pci_dev *pdev = rocker->pdev;
+       struct rocker_wait wait;
+       int err;
+
+       err = rocker_reg_test(rocker);
+       if (err) {
+               dev_err(&pdev->dev, "reg test failed\n");
+               return err;
+       }
+
+       err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST),
+                         rocker_test_irq_handler, 0,
+                         rocker_driver_name, &wait);
+       if (err) {
+               dev_err(&pdev->dev, "cannot assign test irq\n");
+               return err;
+       }
+
+       rocker_wait_init(&wait);
+       rocker_write32(rocker, TEST_IRQ, ROCKER_MSIX_VEC_TEST);
+
+       if (!rocker_wait_event_timeout(&wait, HZ / 10)) {
+               dev_err(&pdev->dev, "no interrupt received within a timeout\n");
+               err = -EIO;
+               goto free_irq;
+       }
+
+       err = rocker_dma_test(rocker, &wait);
+       if (err)
+               dev_err(&pdev->dev, "dma test failed\n");
+
+free_irq:
+       free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST), &wait);
+       return err;
+}
+
+/******
+ * TLV
+ ******/
+
+#define ROCKER_TLV_ALIGNTO 8U
+#define ROCKER_TLV_ALIGN(len) \
+       (((len) + ROCKER_TLV_ALIGNTO - 1) & ~(ROCKER_TLV_ALIGNTO - 1))
+#define ROCKER_TLV_HDRLEN ROCKER_TLV_ALIGN(sizeof(struct rocker_tlv))
+
+/*  <------- ROCKER_TLV_HDRLEN -------> <--- ROCKER_TLV_ALIGN(payload) --->
+ * +-----------------------------+- - -+- - - - - - - - - - - - - - -+- - -+
+ * |             Header          | Pad |           Payload           | Pad |
+ * |      (struct rocker_tlv)    | ing |                             | ing |
+ * +-----------------------------+- - -+- - - - - - - - - - - - - - -+- - -+
+ *  <--------------------------- tlv->len -------------------------->
+ */
+
+static struct rocker_tlv *rocker_tlv_next(const struct rocker_tlv *tlv,
+                                         int *remaining)
+{
+       int totlen = ROCKER_TLV_ALIGN(tlv->len);
+
+       *remaining -= totlen;
+       return (struct rocker_tlv *) ((char *) tlv + totlen);
+}
+
+static int rocker_tlv_ok(const struct rocker_tlv *tlv, int remaining)
+{
+       return remaining >= (int) ROCKER_TLV_HDRLEN &&
+              tlv->len >= ROCKER_TLV_HDRLEN &&
+              tlv->len <= remaining;
+}
+
+#define rocker_tlv_for_each(pos, head, len, rem)       \
+       for (pos = head, rem = len;                     \
+            rocker_tlv_ok(pos, rem);                   \
+            pos = rocker_tlv_next(pos, &(rem)))
+
+#define rocker_tlv_for_each_nested(pos, tlv, rem)      \
+       rocker_tlv_for_each(pos, rocker_tlv_data(tlv),  \
+                           rocker_tlv_len(tlv), rem)
+
+static int rocker_tlv_attr_size(int payload)
+{
+       return ROCKER_TLV_HDRLEN + payload;
+}
+
+static int rocker_tlv_total_size(int payload)
+{
+       return ROCKER_TLV_ALIGN(rocker_tlv_attr_size(payload));
+}
+
+static int rocker_tlv_padlen(int payload)
+{
+       return rocker_tlv_total_size(payload) - rocker_tlv_attr_size(payload);
+}
+
+static int rocker_tlv_type(const struct rocker_tlv *tlv)
+{
+       return tlv->type;
+}
+
+static void *rocker_tlv_data(const struct rocker_tlv *tlv)
+{
+       return (char *) tlv + ROCKER_TLV_HDRLEN;
+}
+
+static int rocker_tlv_len(const struct rocker_tlv *tlv)
+{
+       return tlv->len - ROCKER_TLV_HDRLEN;
+}
+
+static u8 rocker_tlv_get_u8(const struct rocker_tlv *tlv)
+{
+       return *(u8 *) rocker_tlv_data(tlv);
+}
+
+static u16 rocker_tlv_get_u16(const struct rocker_tlv *tlv)
+{
+       return *(u16 *) rocker_tlv_data(tlv);
+}
+
+static u32 rocker_tlv_get_u32(const struct rocker_tlv *tlv)
+{
+       return *(u32 *) rocker_tlv_data(tlv);
+}
+
+static u64 rocker_tlv_get_u64(const struct rocker_tlv *tlv)
+{
+       return *(u64 *) rocker_tlv_data(tlv);
+}
+
+static void rocker_tlv_parse(struct rocker_tlv **tb, int maxtype,
+                            const char *buf, int buf_len)
+{
+       const struct rocker_tlv *tlv;
+       const struct rocker_tlv *head = (const struct rocker_tlv *) buf;
+       int rem;
+
+       memset(tb, 0, sizeof(struct rocker_tlv *) * (maxtype + 1));
+
+       rocker_tlv_for_each(tlv, head, buf_len, rem) {
+               u32 type = rocker_tlv_type(tlv);
+
+               if (type > 0 && type <= maxtype)
+                       tb[type] = (struct rocker_tlv *) tlv;
+       }
+}
+
+static void rocker_tlv_parse_nested(struct rocker_tlv **tb, int maxtype,
+                                   const struct rocker_tlv *tlv)
+{
+       rocker_tlv_parse(tb, maxtype, rocker_tlv_data(tlv),
+                        rocker_tlv_len(tlv));
+}
+
+static void rocker_tlv_parse_desc(struct rocker_tlv **tb, int maxtype,
+                                 struct rocker_desc_info *desc_info)
+{
+       rocker_tlv_parse(tb, maxtype, desc_info->data,
+                        desc_info->desc->tlv_size);
+}
+
+static struct rocker_tlv *rocker_tlv_start(struct rocker_desc_info *desc_info)
+{
+       return (struct rocker_tlv *) ((char *) desc_info->data +
+                                              desc_info->tlv_size);
+}
+
+static int rocker_tlv_put(struct rocker_desc_info *desc_info,
+                         int attrtype, int attrlen, const void *data)
+{
+       int tail_room = desc_info->data_size - desc_info->tlv_size;
+       int total_size = rocker_tlv_total_size(attrlen);
+       struct rocker_tlv *tlv;
+
+       if (unlikely(tail_room < total_size))
+               return -EMSGSIZE;
+
+       tlv = rocker_tlv_start(desc_info);
+       desc_info->tlv_size += total_size;
+       tlv->type = attrtype;
+       tlv->len = rocker_tlv_attr_size(attrlen);
+       memcpy(rocker_tlv_data(tlv), data, attrlen);
+       memset((char *) tlv + tlv->len, 0, rocker_tlv_padlen(attrlen));
+       return 0;
+}
+
+static int rocker_tlv_put_u8(struct rocker_desc_info *desc_info,
+                            int attrtype, u8 value)
+{
+       return rocker_tlv_put(desc_info, attrtype, sizeof(u8), &value);
+}
+
+static int rocker_tlv_put_u16(struct rocker_desc_info *desc_info,
+                             int attrtype, u16 value)
+{
+       return rocker_tlv_put(desc_info, attrtype, sizeof(u16), &value);
+}
+
+static int rocker_tlv_put_u32(struct rocker_desc_info *desc_info,
+                             int attrtype, u32 value)
+{
+       return rocker_tlv_put(desc_info, attrtype, sizeof(u32), &value);
+}
+
+static int rocker_tlv_put_u64(struct rocker_desc_info *desc_info,
+                             int attrtype, u64 value)
+{
+       return rocker_tlv_put(desc_info, attrtype, sizeof(u64), &value);
+}
+
+static struct rocker_tlv *
+rocker_tlv_nest_start(struct rocker_desc_info *desc_info, int attrtype)
+{
+       struct rocker_tlv *start = rocker_tlv_start(desc_info);
+
+       if (rocker_tlv_put(desc_info, attrtype, 0, NULL) < 0)
+               return NULL;
+
+       return start;
+}
+
+static void rocker_tlv_nest_end(struct rocker_desc_info *desc_info,
+                               struct rocker_tlv *start)
+{
+       start->len = (char *) rocker_tlv_start(desc_info) - (char *) start;
+}
+
+static void rocker_tlv_nest_cancel(struct rocker_desc_info *desc_info,
+                                  struct rocker_tlv *start)
+{
+       desc_info->tlv_size = (char *) start - desc_info->data;
+}
+
+/******************************************
+ * DMA rings and descriptors manipulations
+ ******************************************/
+
+static u32 __pos_inc(u32 pos, size_t limit)
+{
+       return ++pos == limit ? 0 : pos;
+}
+
+static int rocker_desc_err(struct rocker_desc_info *desc_info)
+{
+       return -(desc_info->desc->comp_err & ~ROCKER_DMA_DESC_COMP_ERR_GEN);
+}
+
+static void rocker_desc_gen_clear(struct rocker_desc_info *desc_info)
+{
+       desc_info->desc->comp_err &= ~ROCKER_DMA_DESC_COMP_ERR_GEN;
+}
+
+static bool rocker_desc_gen(struct rocker_desc_info *desc_info)
+{
+       u32 comp_err = desc_info->desc->comp_err;
+
+       return comp_err & ROCKER_DMA_DESC_COMP_ERR_GEN ? true : false;
+}
+
+static void *rocker_desc_cookie_ptr_get(struct rocker_desc_info *desc_info)
+{
+       return (void *) desc_info->desc->cookie;
+}
+
+static void rocker_desc_cookie_ptr_set(struct rocker_desc_info *desc_info,
+                                      void *ptr)
+{
+       desc_info->desc->cookie = (long) ptr;
+}
+
+static struct rocker_desc_info *
+rocker_desc_head_get(struct rocker_dma_ring_info *info)
+{
+       static struct rocker_desc_info *desc_info;
+       u32 head = __pos_inc(info->head, info->size);
+
+       desc_info = &info->desc_info[info->head];
+       if (head == info->tail)
+               return NULL; /* ring full */
+       desc_info->tlv_size = 0;
+       return desc_info;
+}
+
+static void rocker_desc_commit(struct rocker_desc_info *desc_info)
+{
+       desc_info->desc->buf_size = desc_info->data_size;
+       desc_info->desc->tlv_size = desc_info->tlv_size;
+}
+
+static void rocker_desc_head_set(struct rocker *rocker,
+                                struct rocker_dma_ring_info *info,
+                                struct rocker_desc_info *desc_info)
+{
+       u32 head = __pos_inc(info->head, info->size);
+
+       BUG_ON(head == info->tail);
+       rocker_desc_commit(desc_info);
+       info->head = head;
+       rocker_write32(rocker, DMA_DESC_HEAD(info->type), head);
+}
+
+static struct rocker_desc_info *
+rocker_desc_tail_get(struct rocker_dma_ring_info *info)
+{
+       static struct rocker_desc_info *desc_info;
+
+       if (info->tail == info->head)
+               return NULL; /* nothing to be done between head and tail */
+       desc_info = &info->desc_info[info->tail];
+       if (!rocker_desc_gen(desc_info))
+               return NULL; /* gen bit not set, desc is not ready yet */
+       info->tail = __pos_inc(info->tail, info->size);
+       desc_info->tlv_size = desc_info->desc->tlv_size;
+       return desc_info;
+}
+
+static void rocker_dma_ring_credits_set(struct rocker *rocker,
+                                       struct rocker_dma_ring_info *info,
+                                       u32 credits)
+{
+       if (credits)
+               rocker_write32(rocker, DMA_DESC_CREDITS(info->type), credits);
+}
+
+static unsigned long rocker_dma_ring_size_fix(size_t size)
+{
+       return max(ROCKER_DMA_SIZE_MIN,
+                  min(roundup_pow_of_two(size), ROCKER_DMA_SIZE_MAX));
+}
+
+static int rocker_dma_ring_create(struct rocker *rocker,
+                                 unsigned int type,
+                                 size_t size,
+                                 struct rocker_dma_ring_info *info)
+{
+       int i;
+
+       BUG_ON(size != rocker_dma_ring_size_fix(size));
+       info->size = size;
+       info->type = type;
+       info->head = 0;
+       info->tail = 0;
+       info->desc_info = kcalloc(info->size, sizeof(*info->desc_info),
+                                 GFP_KERNEL);
+       if (!info->desc_info)
+               return -ENOMEM;
+
+       info->desc = pci_alloc_consistent(rocker->pdev,
+                                         info->size * sizeof(*info->desc),
+                                         &info->mapaddr);
+       if (!info->desc) {
+               kfree(info->desc_info);
+               return -ENOMEM;
+       }
+
+       for (i = 0; i < info->size; i++)
+               info->desc_info[i].desc = &info->desc[i];
+
+       rocker_write32(rocker, DMA_DESC_CTRL(info->type),
+                      ROCKER_DMA_DESC_CTRL_RESET);
+       rocker_write64(rocker, DMA_DESC_ADDR(info->type), info->mapaddr);
+       rocker_write32(rocker, DMA_DESC_SIZE(info->type), info->size);
+
+       return 0;
+}
+
+static void rocker_dma_ring_destroy(struct rocker *rocker,
+                                   struct rocker_dma_ring_info *info)
+{
+       rocker_write64(rocker, DMA_DESC_ADDR(info->type), 0);
+
+       pci_free_consistent(rocker->pdev,
+                           info->size * sizeof(struct rocker_desc),
+                           info->desc, info->mapaddr);
+       kfree(info->desc_info);
+}
+
+static void rocker_dma_ring_pass_to_producer(struct rocker *rocker,
+                                            struct rocker_dma_ring_info *info)
+{
+       int i;
+
+       BUG_ON(info->head || info->tail);
+
+       /* When ring is consumer, we need to advance head for each desc.
+        * That tells hw that the desc is ready to be used by it.
+        */
+       for (i = 0; i < info->size - 1; i++)
+               rocker_desc_head_set(rocker, info, &info->desc_info[i]);
+       rocker_desc_commit(&info->desc_info[i]);
+}
+
+static int rocker_dma_ring_bufs_alloc(struct rocker *rocker,
+                                     struct rocker_dma_ring_info *info,
+                                     int direction, size_t buf_size)
+{
+       struct pci_dev *pdev = rocker->pdev;
+       int i;
+       int err;
+
+       for (i = 0; i < info->size; i++) {
+               struct rocker_desc_info *desc_info = &info->desc_info[i];
+               struct rocker_desc *desc = &info->desc[i];
+               dma_addr_t dma_handle;
+               char *buf;
+
+               buf = kzalloc(buf_size, GFP_KERNEL | GFP_DMA);
+               if (!buf) {
+                       err = -ENOMEM;
+                       goto rollback;
+               }
+
+               dma_handle = pci_map_single(pdev, buf, buf_size, direction);
+               if (pci_dma_mapping_error(pdev, dma_handle)) {
+                       kfree(buf);
+                       err = -EIO;
+                       goto rollback;
+               }
+
+               desc_info->data = buf;
+               desc_info->data_size = buf_size;
+               dma_unmap_addr_set(desc_info, mapaddr, dma_handle);
+
+               desc->buf_addr = dma_handle;
+               desc->buf_size = buf_size;
+       }
+       return 0;
+
+rollback:
+       for (i--; i >= 0; i--) {
+               struct rocker_desc_info *desc_info = &info->desc_info[i];
+
+               pci_unmap_single(pdev, dma_unmap_addr(desc_info, mapaddr),
+                                desc_info->data_size, direction);
+               kfree(desc_info->data);
+       }
+       return err;
+}
+
+static void rocker_dma_ring_bufs_free(struct rocker *rocker,
+                                     struct rocker_dma_ring_info *info,
+                                     int direction)
+{
+       struct pci_dev *pdev = rocker->pdev;
+       int i;
+
+       for (i = 0; i < info->size; i++) {
+               struct rocker_desc_info *desc_info = &info->desc_info[i];
+               struct rocker_desc *desc = &info->desc[i];
+
+               desc->buf_addr = 0;
+               desc->buf_size = 0;
+               pci_unmap_single(pdev, dma_unmap_addr(desc_info, mapaddr),
+                                desc_info->data_size, direction);
+               kfree(desc_info->data);
+       }
+}
+
+static int rocker_dma_rings_init(struct rocker *rocker)
+{
+       struct pci_dev *pdev = rocker->pdev;
+       int err;
+
+       err = rocker_dma_ring_create(rocker, ROCKER_DMA_CMD,
+                                    ROCKER_DMA_CMD_DEFAULT_SIZE,
+                                    &rocker->cmd_ring);
+       if (err) {
+               dev_err(&pdev->dev, "failed to create command dma ring\n");
+               return err;
+       }
+
+       spin_lock_init(&rocker->cmd_ring_lock);
+
+       err = rocker_dma_ring_bufs_alloc(rocker, &rocker->cmd_ring,
+                                        PCI_DMA_BIDIRECTIONAL, PAGE_SIZE);
+       if (err) {
+               dev_err(&pdev->dev, "failed to alloc command dma ring buffers\n");
+               goto err_dma_cmd_ring_bufs_alloc;
+       }
+
+       err = rocker_dma_ring_create(rocker, ROCKER_DMA_EVENT,
+                                    ROCKER_DMA_EVENT_DEFAULT_SIZE,
+                                    &rocker->event_ring);
+       if (err) {
+               dev_err(&pdev->dev, "failed to create event dma ring\n");
+               goto err_dma_event_ring_create;
+       }
+
+       err = rocker_dma_ring_bufs_alloc(rocker, &rocker->event_ring,
+                                        PCI_DMA_FROMDEVICE, PAGE_SIZE);
+       if (err) {
+               dev_err(&pdev->dev, "failed to alloc event dma ring buffers\n");
+               goto err_dma_event_ring_bufs_alloc;
+       }
+       rocker_dma_ring_pass_to_producer(rocker, &rocker->event_ring);
+       return 0;
+
+err_dma_event_ring_bufs_alloc:
+       rocker_dma_ring_destroy(rocker, &rocker->event_ring);
+err_dma_event_ring_create:
+       rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
+                                 PCI_DMA_BIDIRECTIONAL);
+err_dma_cmd_ring_bufs_alloc:
+       rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
+       return err;
+}
+
+static void rocker_dma_rings_fini(struct rocker *rocker)
+{
+       rocker_dma_ring_bufs_free(rocker, &rocker->event_ring,
+                                 PCI_DMA_BIDIRECTIONAL);
+       rocker_dma_ring_destroy(rocker, &rocker->event_ring);
+       rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
+                                 PCI_DMA_BIDIRECTIONAL);
+       rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
+}
+
+static int rocker_dma_rx_ring_skb_map(struct rocker *rocker,
+                                     struct rocker_port *rocker_port,
+                                     struct rocker_desc_info *desc_info,
+                                     struct sk_buff *skb, size_t buf_len)
+{
+       struct pci_dev *pdev = rocker->pdev;
+       dma_addr_t dma_handle;
+
+       dma_handle = pci_map_single(pdev, skb->data, buf_len,
+                                   PCI_DMA_FROMDEVICE);
+       if (pci_dma_mapping_error(pdev, dma_handle))
+               return -EIO;
+       if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_RX_FRAG_ADDR, dma_handle))
+               goto tlv_put_failure;
+       if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_RX_FRAG_MAX_LEN, buf_len))
+               goto tlv_put_failure;
+       return 0;
+
+tlv_put_failure:
+       pci_unmap_single(pdev, dma_handle, buf_len, PCI_DMA_FROMDEVICE);
+       desc_info->tlv_size = 0;
+       return -EMSGSIZE;
+}
+
+static size_t rocker_port_rx_buf_len(struct rocker_port *rocker_port)
+{
+       return rocker_port->dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
+}
+
+static int rocker_dma_rx_ring_skb_alloc(struct rocker *rocker,
+                                       struct rocker_port *rocker_port,
+                                       struct rocker_desc_info *desc_info)
+{
+       struct net_device *dev = rocker_port->dev;
+       struct sk_buff *skb;
+       size_t buf_len = rocker_port_rx_buf_len(rocker_port);
+       int err;
+
+       /* Ensure that hw will see tlv_size zero in case of an error.
+        * That tells hw to use another descriptor.
+        */
+       rocker_desc_cookie_ptr_set(desc_info, NULL);
+       desc_info->tlv_size = 0;
+
+       skb = netdev_alloc_skb_ip_align(dev, buf_len);
+       if (!skb)
+               return -ENOMEM;
+       err = rocker_dma_rx_ring_skb_map(rocker, rocker_port, desc_info,
+                                        skb, buf_len);
+       if (err) {
+               dev_kfree_skb_any(skb);
+               return err;
+       }
+       rocker_desc_cookie_ptr_set(desc_info, skb);
+       return 0;
+}
+
+static void rocker_dma_rx_ring_skb_unmap(struct rocker *rocker,
+                                        struct rocker_tlv **attrs)
+{
+       struct pci_dev *pdev = rocker->pdev;
+       dma_addr_t dma_handle;
+       size_t len;
+
+       if (!attrs[ROCKER_TLV_RX_FRAG_ADDR] ||
+           !attrs[ROCKER_TLV_RX_FRAG_MAX_LEN])
+               return;
+       dma_handle = rocker_tlv_get_u64(attrs[ROCKER_TLV_RX_FRAG_ADDR]);
+       len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_MAX_LEN]);
+       pci_unmap_single(pdev, dma_handle, len, PCI_DMA_FROMDEVICE);
+}
+
+static void rocker_dma_rx_ring_skb_free(struct rocker *rocker,
+                                       struct rocker_desc_info *desc_info)
+{
+       struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
+       struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
+
+       if (!skb)
+               return;
+       rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
+       rocker_dma_rx_ring_skb_unmap(rocker, attrs);
+       dev_kfree_skb_any(skb);
+}
+
+static int rocker_dma_rx_ring_skbs_alloc(struct rocker *rocker,
+                                        struct rocker_port *rocker_port)
+{
+       struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
+       int i;
+       int err;
+
+       for (i = 0; i < rx_ring->size; i++) {
+               err = rocker_dma_rx_ring_skb_alloc(rocker, rocker_port,
+                                                  &rx_ring->desc_info[i]);
+               if (err)
+                       goto rollback;
+       }
+       return 0;
+
+rollback:
+       for (i--; i >= 0; i--)
+               rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
+       return err;
+}
+
+static void rocker_dma_rx_ring_skbs_free(struct rocker *rocker,
+                                        struct rocker_port *rocker_port)
+{
+       struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
+       int i;
+
+       for (i = 0; i < rx_ring->size; i++)
+               rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
+}
+
+static int rocker_port_dma_rings_init(struct rocker_port *rocker_port)
+{
+       struct rocker *rocker = rocker_port->rocker;
+       int err;
+
+       err = rocker_dma_ring_create(rocker,
+                                    ROCKER_DMA_TX(rocker_port->port_number),
+                                    ROCKER_DMA_TX_DEFAULT_SIZE,
+                                    &rocker_port->tx_ring);
+       if (err) {
+               netdev_err(rocker_port->dev, "failed to create tx dma ring\n");
+               return err;
+       }
+
+       err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->tx_ring,
+                                        PCI_DMA_TODEVICE,
+                                        ROCKER_DMA_TX_DESC_SIZE);
+       if (err) {
+               netdev_err(rocker_port->dev, "failed to alloc tx dma ring buffers\n");
+               goto err_dma_tx_ring_bufs_alloc;
+       }
+
+       err = rocker_dma_ring_create(rocker,
+                                    ROCKER_DMA_RX(rocker_port->port_number),
+                                    ROCKER_DMA_RX_DEFAULT_SIZE,
+                                    &rocker_port->rx_ring);
+       if (err) {
+               netdev_err(rocker_port->dev, "failed to create rx dma ring\n");
+               goto err_dma_rx_ring_create;
+       }
+
+       err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->rx_ring,
+                                        PCI_DMA_BIDIRECTIONAL,
+                                        ROCKER_DMA_RX_DESC_SIZE);
+       if (err) {
+               netdev_err(rocker_port->dev, "failed to alloc rx dma ring buffers\n");
+               goto err_dma_rx_ring_bufs_alloc;
+       }
+
+       err = rocker_dma_rx_ring_skbs_alloc(rocker, rocker_port);
+       if (err) {
+               netdev_err(rocker_port->dev, "failed to alloc rx dma ring skbs\n");
+               goto err_dma_rx_ring_skbs_alloc;
+       }
+       rocker_dma_ring_pass_to_producer(rocker, &rocker_port->rx_ring);
+
+       return 0;
+
+err_dma_rx_ring_skbs_alloc:
+       rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
+                                 PCI_DMA_BIDIRECTIONAL);
+err_dma_rx_ring_bufs_alloc:
+       rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
+err_dma_rx_ring_create:
+       rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
+                                 PCI_DMA_TODEVICE);
+err_dma_tx_ring_bufs_alloc:
+       rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
+       return err;
+}
+
+static void rocker_port_dma_rings_fini(struct rocker_port *rocker_port)
+{
+       struct rocker *rocker = rocker_port->rocker;
+
+       rocker_dma_rx_ring_skbs_free(rocker, rocker_port);
+       rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
+                                 PCI_DMA_BIDIRECTIONAL);
+       rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
+       rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
+                                 PCI_DMA_TODEVICE);
+       rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
+}
+
+static void rocker_port_set_enable(struct rocker_port *rocker_port, bool enable)
+{
+       u64 val = rocker_read64(rocker_port->rocker, PORT_PHYS_ENABLE);
+
+       if (enable)
+               val |= 1 << rocker_port->lport;
+       else
+               val &= ~(1 << rocker_port->lport);
+       rocker_write64(rocker_port->rocker, PORT_PHYS_ENABLE, val);
+}
+
+/********************************
+ * Interrupt handler and helpers
+ ********************************/
+
+static irqreturn_t rocker_cmd_irq_handler(int irq, void *dev_id)
+{
+       struct rocker *rocker = dev_id;
+       struct rocker_desc_info *desc_info;
+       struct rocker_wait *wait;
+       u32 credits = 0;
+
+       spin_lock(&rocker->cmd_ring_lock);
+       while ((desc_info = rocker_desc_tail_get(&rocker->cmd_ring))) {
+               wait = rocker_desc_cookie_ptr_get(desc_info);
+               if (wait->nowait) {
+                       rocker_desc_gen_clear(desc_info);
+                       rocker_wait_destroy(wait);
+               } else {
+                       rocker_wait_wake_up(wait);
+               }
+               credits++;
+       }
+       spin_unlock(&rocker->cmd_ring_lock);
+       rocker_dma_ring_credits_set(rocker, &rocker->cmd_ring, credits);
+
+       return IRQ_HANDLED;
+}
+
+static void rocker_port_link_up(struct rocker_port *rocker_port)
+{
+       netif_carrier_on(rocker_port->dev);
+       netdev_info(rocker_port->dev, "Link is up\n");
+}
+
+static void rocker_port_link_down(struct rocker_port *rocker_port)
+{
+       netif_carrier_off(rocker_port->dev);
+       netdev_info(rocker_port->dev, "Link is down\n");
+}
+
+static int rocker_event_link_change(struct rocker *rocker,
+                                   const struct rocker_tlv *info)
+{
+       struct rocker_tlv *attrs[ROCKER_TLV_EVENT_LINK_CHANGED_MAX + 1];
+       unsigned int port_number;
+       bool link_up;
+       struct rocker_port *rocker_port;
+
+       rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_LINK_CHANGED_MAX, info);
+       if (!attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LPORT] ||
+           !attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP])
+               return -EIO;
+       port_number =
+               rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LPORT]) - 1;
+       link_up = rocker_tlv_get_u8(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP]);
+
+       if (port_number >= rocker->port_count)
+               return -EINVAL;
+
+       rocker_port = rocker->ports[port_number];
+       if (netif_carrier_ok(rocker_port->dev) != link_up) {
+               if (link_up)
+                       rocker_port_link_up(rocker_port);
+               else
+                       rocker_port_link_down(rocker_port);
+       }
+
+       return 0;
+}
+
+static int rocker_event_process(struct rocker *rocker,
+                               struct rocker_desc_info *desc_info)
+{
+       struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAX + 1];
+       struct rocker_tlv *info;
+       u16 type;
+
+       rocker_tlv_parse_desc(attrs, ROCKER_TLV_EVENT_MAX, desc_info);
+       if (!attrs[ROCKER_TLV_EVENT_TYPE] ||
+           !attrs[ROCKER_TLV_EVENT_INFO])
+               return -EIO;
+
+       type = rocker_tlv_get_u16(attrs[ROCKER_TLV_EVENT_TYPE]);
+       info = attrs[ROCKER_TLV_EVENT_INFO];
+
+       switch (type) {
+       case ROCKER_TLV_EVENT_TYPE_LINK_CHANGED:
+               return rocker_event_link_change(rocker, info);
+       }
+
+       return -EOPNOTSUPP;
+}
+
+static irqreturn_t rocker_event_irq_handler(int irq, void *dev_id)
+{
+       struct rocker *rocker = dev_id;
+       struct pci_dev *pdev = rocker->pdev;
+       struct rocker_desc_info *desc_info;
+       u32 credits = 0;
+       int err;
+
+       while ((desc_info = rocker_desc_tail_get(&rocker->event_ring))) {
+               err = rocker_desc_err(desc_info);
+               if (err) {
+                       dev_err(&pdev->dev, "event desc received with err %d\n",
+                               err);
+               } else {
+                       err = rocker_event_process(rocker, desc_info);
+                       if (err)
+                               dev_err(&pdev->dev, "event processing failed with err %d\n",
+                                       err);
+               }
+               rocker_desc_gen_clear(desc_info);
+               rocker_desc_head_set(rocker, &rocker->event_ring, desc_info);
+               credits++;
+       }
+       rocker_dma_ring_credits_set(rocker, &rocker->event_ring, credits);
+
+       return IRQ_HANDLED;
+}
+
+static irqreturn_t rocker_tx_irq_handler(int irq, void *dev_id)
+{
+       struct rocker_port *rocker_port = dev_id;
+
+       napi_schedule(&rocker_port->napi_tx);
+       return IRQ_HANDLED;
+}
+
+static irqreturn_t rocker_rx_irq_handler(int irq, void *dev_id)
+{
+       struct rocker_port *rocker_port = dev_id;
+
+       napi_schedule(&rocker_port->napi_rx);
+       return IRQ_HANDLED;
+}
+
+/********************
+ * Command interface
+ ********************/
+
+typedef int (*rocker_cmd_cb_t)(struct rocker *rocker,
+                              struct rocker_port *rocker_port,
+                              struct rocker_desc_info *desc_info,
+                              void *priv);
+
+static int rocker_cmd_exec(struct rocker *rocker,
+                          struct rocker_port *rocker_port,
+                          rocker_cmd_cb_t prepare, void *prepare_priv,
+                          rocker_cmd_cb_t process, void *process_priv,
+                          bool nowait)
+{
+       struct rocker_desc_info *desc_info;
+       struct rocker_wait *wait;
+       unsigned long flags;
+       int err;
+
+       wait = rocker_wait_create(nowait ? GFP_ATOMIC : GFP_KERNEL);
+       if (!wait)
+               return -ENOMEM;
+       wait->nowait = nowait;
+
+       spin_lock_irqsave(&rocker->cmd_ring_lock, flags);
+       desc_info = rocker_desc_head_get(&rocker->cmd_ring);
+       if (!desc_info) {
+               spin_unlock_irqrestore(&rocker->cmd_ring_lock, flags);
+               err = -EAGAIN;
+               goto out;
+       }
+       err = prepare(rocker, rocker_port, desc_info, prepare_priv);
+       if (err) {
+               spin_unlock_irqrestore(&rocker->cmd_ring_lock, flags);
+               goto out;
+       }
+       rocker_desc_cookie_ptr_set(desc_info, wait);
+       rocker_desc_head_set(rocker, &rocker->cmd_ring, desc_info);
+       spin_unlock_irqrestore(&rocker->cmd_ring_lock, flags);
+
+       if (nowait)
+               return 0;
+
+       if (!rocker_wait_event_timeout(wait, HZ / 10))
+               return -EIO;
+
+       err = rocker_desc_err(desc_info);
+       if (err)
+               return err;
+
+       if (process)
+               err = process(rocker, rocker_port, desc_info, process_priv);
+
+       rocker_desc_gen_clear(desc_info);
+out:
+       rocker_wait_destroy(wait);
+       return err;
+}
+
+static int
+rocker_cmd_get_port_settings_prep(struct rocker *rocker,
+                                 struct rocker_port *rocker_port,
+                                 struct rocker_desc_info *desc_info,
+                                 void *priv)
+{
+       struct rocker_tlv *cmd_info;
+
+       if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
+                              ROCKER_TLV_CMD_TYPE_GET_PORT_SETTINGS))
+               return -EMSGSIZE;
+       cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
+       if (!cmd_info)
+               return -EMSGSIZE;
+       if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_LPORT,
+                              rocker_port->lport))
+               return -EMSGSIZE;
+       rocker_tlv_nest_end(desc_info, cmd_info);
+       return 0;
+}
+
+static int
+rocker_cmd_get_port_settings_ethtool_proc(struct rocker *rocker,
+                                         struct rocker_port *rocker_port,
+                                         struct rocker_desc_info *desc_info,
+                                         void *priv)
+{
+       struct ethtool_cmd *ecmd = priv;
+       struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
+       struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
+       u32 speed;
+       u8 duplex;
+       u8 autoneg;
+
+       rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
+       if (!attrs[ROCKER_TLV_CMD_INFO])
+               return -EIO;
+
+       rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
+                               attrs[ROCKER_TLV_CMD_INFO]);
+       if (!info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED] ||
+           !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX] ||
+           !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG])
+               return -EIO;
+
+       speed = rocker_tlv_get_u32(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED]);
+       duplex = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX]);
+       autoneg = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG]);
+
+       ecmd->transceiver = XCVR_INTERNAL;
+       ecmd->supported = SUPPORTED_TP;
+       ecmd->phy_address = 0xff;
+       ecmd->port = PORT_TP;
+       ethtool_cmd_speed_set(ecmd, speed);
+       ecmd->duplex = duplex ? DUPLEX_FULL : DUPLEX_HALF;
+       ecmd->autoneg = autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
+
+       return 0;
+}
+
+static int
+rocker_cmd_get_port_settings_macaddr_proc(struct rocker *rocker,
+                                         struct rocker_port *rocker_port,
+                                         struct rocker_desc_info *desc_info,
+                                         void *priv)
+{
+       unsigned char *macaddr = priv;
+       struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
+       struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
+       struct rocker_tlv *attr;
+
+       rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
+       if (!attrs[ROCKER_TLV_CMD_INFO])
+               return -EIO;
+
+       rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
+                               attrs[ROCKER_TLV_CMD_INFO]);
+       attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR];
+       if (!attr)
+               return -EIO;
+
+       if (rocker_tlv_len(attr) != ETH_ALEN)
+               return -EINVAL;
+
+       ether_addr_copy(macaddr, rocker_tlv_data(attr));
+       return 0;
+}
+
+static int
+rocker_cmd_set_port_settings_ethtool_prep(struct rocker *rocker,
+                                         struct rocker_port *rocker_port,
+                                         struct rocker_desc_info *desc_info,
+                                         void *priv)
+{
+       struct ethtool_cmd *ecmd = priv;
+       struct rocker_tlv *cmd_info;
+
+       if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
+                              ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
+               return -EMSGSIZE;
+       cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
+       if (!cmd_info)
+               return -EMSGSIZE;
+       if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_LPORT,
+                              rocker_port->lport))
+               return -EMSGSIZE;
+       if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_SPEED,
+                              ethtool_cmd_speed(ecmd)))
+               return -EMSGSIZE;
+       if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX,
+                             ecmd->duplex))
+               return -EMSGSIZE;
+       if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG,
+                             ecmd->autoneg))
+               return -EMSGSIZE;
+       rocker_tlv_nest_end(desc_info, cmd_info);
+       return 0;
+}
+
+static int
+rocker_cmd_set_port_settings_macaddr_prep(struct rocker *rocker,
+                                         struct rocker_port *rocker_port,
+                                         struct rocker_desc_info *desc_info,
+                                         void *priv)
+{
+       unsigned char *macaddr = priv;
+       struct rocker_tlv *cmd_info;
+
+       if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
+                              ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
+               return -EMSGSIZE;
+       cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
+       if (!cmd_info)
+               return -EMSGSIZE;
+       if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_LPORT,
+                              rocker_port->lport))
+               return -EMSGSIZE;
+       if (rocker_tlv_put(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,
+                          ETH_ALEN, macaddr))
+               return -EMSGSIZE;
+       rocker_tlv_nest_end(desc_info, cmd_info);
+       return 0;
+}
+
+static int rocker_cmd_get_port_settings_ethtool(struct rocker_port *rocker_port,
+                                               struct ethtool_cmd *ecmd)
+{
+       return rocker_cmd_exec(rocker_port->rocker, rocker_port,
+                              rocker_cmd_get_port_settings_prep, NULL,
+                              rocker_cmd_get_port_settings_ethtool_proc,
+                              ecmd, false);
+}
+
+static int rocker_cmd_get_port_settings_macaddr(struct rocker_port *rocker_port,
+                                               unsigned char *macaddr)
+{
+       return rocker_cmd_exec(rocker_port->rocker, rocker_port,
+                              rocker_cmd_get_port_settings_prep, NULL,
+                              rocker_cmd_get_port_settings_macaddr_proc,
+                              macaddr, false);
+}
+
+static int rocker_cmd_set_port_settings_ethtool(struct rocker_port *rocker_port,
+                                               struct ethtool_cmd *ecmd)
+{
+       return rocker_cmd_exec(rocker_port->rocker, rocker_port,
+                              rocker_cmd_set_port_settings_ethtool_prep,
+                              ecmd, NULL, NULL, false);
+}
+
+static int rocker_cmd_set_port_settings_macaddr(struct rocker_port *rocker_port,
+                                               unsigned char *macaddr)
+{
+       return rocker_cmd_exec(rocker_port->rocker, rocker_port,
+                              rocker_cmd_set_port_settings_macaddr_prep,
+                              macaddr, NULL, NULL, false);
+}
+
+/*****************
+ * Net device ops
+ *****************/
+
+static int rocker_port_open(struct net_device *dev)
+{
+       struct rocker_port *rocker_port = netdev_priv(dev);
+       int err;
+
+       err = rocker_port_dma_rings_init(rocker_port);
+       if (err)
+               return err;
+
+       err = request_irq(rocker_msix_tx_vector(rocker_port),
+                         rocker_tx_irq_handler, 0,
+                         rocker_driver_name, rocker_port);
+       if (err) {
+               netdev_err(rocker_port->dev, "cannot assign tx irq\n");
+               goto err_request_tx_irq;
+       }
+
+       err = request_irq(rocker_msix_rx_vector(rocker_port),
+                         rocker_rx_irq_handler, 0,
+                         rocker_driver_name, rocker_port);
+       if (err) {
+               netdev_err(rocker_port->dev, "cannot assign rx irq\n");
+               goto err_request_rx_irq;
+       }
+
+       napi_enable(&rocker_port->napi_tx);
+       napi_enable(&rocker_port->napi_rx);
+       rocker_port_set_enable(rocker_port, true);
+       netif_start_queue(dev);
+       return 0;
+
+err_request_rx_irq:
+       free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
+err_request_tx_irq:
+       rocker_port_dma_rings_fini(rocker_port);
+       return err;
+}
+
+static int rocker_port_stop(struct net_device *dev)
+{
+       struct rocker_port *rocker_port = netdev_priv(dev);
+
+       netif_stop_queue(dev);
+       rocker_port_set_enable(rocker_port, false);
+       napi_disable(&rocker_port->napi_rx);
+       napi_disable(&rocker_port->napi_tx);
+       free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
+       free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
+       rocker_port_dma_rings_fini(rocker_port);
+
+       return 0;
+}
+
+static void rocker_tx_desc_frags_unmap(struct rocker_port *rocker_port,
+                                      struct rocker_desc_info *desc_info)
+{
+       struct rocker *rocker = rocker_port->rocker;
+       struct pci_dev *pdev = rocker->pdev;
+       struct rocker_tlv *attrs[ROCKER_TLV_TX_MAX + 1];
+       struct rocker_tlv *attr;
+       int rem;
+
+       rocker_tlv_parse_desc(attrs, ROCKER_TLV_TX_MAX, desc_info);
+       if (!attrs[ROCKER_TLV_TX_FRAGS])
+               return;
+       rocker_tlv_for_each_nested(attr, attrs[ROCKER_TLV_TX_FRAGS], rem) {
+               struct rocker_tlv *frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_MAX + 1];
+               dma_addr_t dma_handle;
+               size_t len;
+
+               if (rocker_tlv_type(attr) != ROCKER_TLV_TX_FRAG)
+                       continue;
+               rocker_tlv_parse_nested(frag_attrs, ROCKER_TLV_TX_FRAG_ATTR_MAX,
+                                       attr);
+               if (!frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR] ||
+                   !frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN])
+                       continue;
+               dma_handle = rocker_tlv_get_u64(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR]);
+               len = rocker_tlv_get_u16(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN]);
+               pci_unmap_single(pdev, dma_handle, len, DMA_TO_DEVICE);
+       }
+}
+
+static int rocker_tx_desc_frag_map_put(struct rocker_port *rocker_port,
+                                      struct rocker_desc_info *desc_info,
+                                      char *buf, size_t buf_len)
+{
+       struct rocker *rocker = rocker_port->rocker;
+       struct pci_dev *pdev = rocker->pdev;
+       dma_addr_t dma_handle;
+       struct rocker_tlv *frag;
+
+       dma_handle = pci_map_single(pdev, buf, buf_len, DMA_TO_DEVICE);
+       if (unlikely(pci_dma_mapping_error(pdev, dma_handle))) {
+               if (net_ratelimit())
+                       netdev_err(rocker_port->dev, "failed to dma map tx frag\n");
+               return -EIO;
+       }
+       frag = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAG);
+       if (!frag)
+               goto unmap_frag;
+       if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_TX_FRAG_ATTR_ADDR,
+                              dma_handle))
+               goto nest_cancel;
+       if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_TX_FRAG_ATTR_LEN,
+                              buf_len))
+               goto nest_cancel;
+       rocker_tlv_nest_end(desc_info, frag);
+       return 0;
+
+nest_cancel:
+       rocker_tlv_nest_cancel(desc_info, frag);
+unmap_frag:
+       pci_unmap_single(pdev, dma_handle, buf_len, DMA_TO_DEVICE);
+       return -EMSGSIZE;
+}
+
+static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+       struct rocker_port *rocker_port = netdev_priv(dev);
+       struct rocker *rocker = rocker_port->rocker;
+       struct rocker_desc_info *desc_info;
+       struct rocker_tlv *frags;
+       int i;
+       int err;
+
+       desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
+       if (unlikely(!desc_info)) {
+               if (net_ratelimit())
+                       netdev_err(dev, "tx ring full when queue awake\n");
+               return NETDEV_TX_BUSY;
+       }
+
+       rocker_desc_cookie_ptr_set(desc_info, skb);
+
+       frags = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAGS);
+       if (!frags)
+               goto out;
+       err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
+                                         skb->data, skb_headlen(skb));
+       if (err)
+               goto nest_cancel;
+       if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX)
+               goto nest_cancel;
+
+       for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+               const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+
+               err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
+                                                 skb_frag_address(frag),
+                                                 skb_frag_size(frag));
+               if (err)
+                       goto unmap_frags;
+       }
+       rocker_tlv_nest_end(desc_info, frags);
+
+       rocker_desc_gen_clear(desc_info);
+       rocker_desc_head_set(rocker, &rocker_port->tx_ring, desc_info);
+
+       desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
+       if (!desc_info)
+               netif_stop_queue(dev);
+
+       return NETDEV_TX_OK;
+
+unmap_frags:
+       rocker_tx_desc_frags_unmap(rocker_port, desc_info);
+nest_cancel:
+       rocker_tlv_nest_cancel(desc_info, frags);
+out:
+       dev_kfree_skb(skb);
+       return NETDEV_TX_OK;
+}
+
+static int rocker_port_set_mac_address(struct net_device *dev, void *p)
+{
+       struct sockaddr *addr = p;
+       struct rocker_port *rocker_port = netdev_priv(dev);
+       int err;
+
+       if (!is_valid_ether_addr(addr->sa_data))
+               return -EADDRNOTAVAIL;
+
+       err = rocker_cmd_set_port_settings_macaddr(rocker_port, addr->sa_data);
+       if (err)
+               return err;
+       memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
+       return 0;
+}
+
+static int rocker_port_switch_parent_id_get(struct net_device *dev,
+                                           struct netdev_phys_item_id *psid)
+{
+       struct rocker_port *rocker_port = netdev_priv(dev);
+       struct rocker *rocker = rocker_port->rocker;
+
+       psid->id_len = sizeof(rocker->hw.id);
+       memcpy(&psid->id, &rocker->hw.id, psid->id_len);
+       return 0;
+}
+
+static const struct net_device_ops rocker_port_netdev_ops = {
+       .ndo_open                       = rocker_port_open,
+       .ndo_stop                       = rocker_port_stop,
+       .ndo_start_xmit                 = rocker_port_xmit,
+       .ndo_set_mac_address            = rocker_port_set_mac_address,
+       .ndo_switch_parent_id_get       = rocker_port_switch_parent_id_get,
+};
+
+/********************
+ * ethtool interface
+ ********************/
+
+static int rocker_port_get_settings(struct net_device *dev,
+                                   struct ethtool_cmd *ecmd)
+{
+       struct rocker_port *rocker_port = netdev_priv(dev);
+
+       return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
+}
+
+static int rocker_port_set_settings(struct net_device *dev,
+                                   struct ethtool_cmd *ecmd)
+{
+       struct rocker_port *rocker_port = netdev_priv(dev);
+
+       return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd);
+}
+
+static void rocker_port_get_drvinfo(struct net_device *dev,
+                                   struct ethtool_drvinfo *drvinfo)
+{
+       strlcpy(drvinfo->driver, rocker_driver_name, sizeof(drvinfo->driver));
+       strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
+}
+
+static const struct ethtool_ops rocker_port_ethtool_ops = {
+       .get_settings           = rocker_port_get_settings,
+       .set_settings           = rocker_port_set_settings,
+       .get_drvinfo            = rocker_port_get_drvinfo,
+       .get_link               = ethtool_op_get_link,
+};
+
+/*****************
+ * NAPI interface
+ *****************/
+
+static struct rocker_port *rocker_port_napi_tx_get(struct napi_struct *napi)
+{
+       return container_of(napi, struct rocker_port, napi_tx);
+}
+
+static int rocker_port_poll_tx(struct napi_struct *napi, int budget)
+{
+       struct rocker_port *rocker_port = rocker_port_napi_tx_get(napi);
+       struct rocker *rocker = rocker_port->rocker;
+       struct rocker_desc_info *desc_info;
+       u32 credits = 0;
+       int err;
+
+       /* Cleanup tx descriptors */
+       while ((desc_info = rocker_desc_tail_get(&rocker_port->tx_ring))) {
+               err = rocker_desc_err(desc_info);
+               if (err && net_ratelimit())
+                       netdev_err(rocker_port->dev, "tx desc received with err %d\n",
+                                  err);
+               rocker_tx_desc_frags_unmap(rocker_port, desc_info);
+               dev_kfree_skb_any(rocker_desc_cookie_ptr_get(desc_info));
+               credits++;
+       }
+
+       if (credits && netif_queue_stopped(rocker_port->dev))
+               netif_wake_queue(rocker_port->dev);
+
+       napi_complete(napi);
+       rocker_dma_ring_credits_set(rocker, &rocker_port->tx_ring, credits);
+
+       return 0;
+}
+
+static int rocker_port_rx_proc(struct rocker *rocker,
+                              struct rocker_port *rocker_port,
+                              struct rocker_desc_info *desc_info)
+{
+       struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
+       struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
+       size_t rx_len;
+
+       if (!skb)
+               return -ENOENT;
+
+       rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
+       if (!attrs[ROCKER_TLV_RX_FRAG_LEN])
+               return -EINVAL;
+
+       rocker_dma_rx_ring_skb_unmap(rocker, attrs);
+
+       rx_len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_LEN]);
+       skb_put(skb, rx_len);
+       skb->protocol = eth_type_trans(skb, rocker_port->dev);
+       netif_receive_skb(skb);
+
+       return rocker_dma_rx_ring_skb_alloc(rocker, rocker_port, desc_info);
+}
+
+static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi)
+{
+       return container_of(napi, struct rocker_port, napi_rx);
+}
+
+static int rocker_port_poll_rx(struct napi_struct *napi, int budget)
+{
+       struct rocker_port *rocker_port = rocker_port_napi_rx_get(napi);
+       struct rocker *rocker = rocker_port->rocker;
+       struct rocker_desc_info *desc_info;
+       u32 credits = 0;
+       int err;
+
+       /* Process rx descriptors */
+       while (credits < budget &&
+              (desc_info = rocker_desc_tail_get(&rocker_port->rx_ring))) {
+               err = rocker_desc_err(desc_info);
+               if (err) {
+                       if (net_ratelimit())
+                               netdev_err(rocker_port->dev, "rx desc received with err %d\n",
+                                          err);
+               } else {
+                       err = rocker_port_rx_proc(rocker, rocker_port,
+                                                 desc_info);
+                       if (err && net_ratelimit())
+                               netdev_err(rocker_port->dev, "rx processing failed with err %d\n",
+                                          err);
+               }
+               rocker_desc_gen_clear(desc_info);
+               rocker_desc_head_set(rocker, &rocker_port->rx_ring, desc_info);
+               credits++;
+       }
+
+       if (credits < budget)
+               napi_complete(napi);
+
+       rocker_dma_ring_credits_set(rocker, &rocker_port->rx_ring, credits);
+
+       return credits;
+}
+
+/*****************
+ * PCI driver ops
+ *****************/
+
+static void rocker_carrier_init(struct rocker_port *rocker_port)
+{
+       struct rocker *rocker = rocker_port->rocker;
+       u64 link_status = rocker_read64(rocker, PORT_PHYS_LINK_STATUS);
+       bool link_up;
+
+       link_up = link_status & (1 << rocker_port->lport);
+       if (link_up)
+               netif_carrier_on(rocker_port->dev);
+       else
+               netif_carrier_off(rocker_port->dev);
+}
+
+static void rocker_remove_ports(struct rocker *rocker)
+{
+       int i;
+
+       for (i = 0; i < rocker->port_count; i++)
+               unregister_netdev(rocker->ports[i]->dev);
+       kfree(rocker->ports);
+}
+
+static void rocker_port_dev_addr_init(struct rocker *rocker,
+                                     struct rocker_port *rocker_port)
+{
+       struct pci_dev *pdev = rocker->pdev;
+       int err;
+
+       err = rocker_cmd_get_port_settings_macaddr(rocker_port,
+                                                  rocker_port->dev->dev_addr);
+       if (err) {
+               dev_warn(&pdev->dev, "failed to get mac address, using random\n");
+               eth_hw_addr_random(rocker_port->dev);
+       }
+}
+
+static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
+{
+       struct pci_dev *pdev = rocker->pdev;
+       struct rocker_port *rocker_port;
+       struct net_device *dev;
+       int err;
+
+       dev = alloc_etherdev(sizeof(struct rocker_port));
+       if (!dev)
+               return -ENOMEM;
+       rocker_port = netdev_priv(dev);
+       rocker_port->dev = dev;
+       rocker_port->rocker = rocker;
+       rocker_port->port_number = port_number;
+       rocker_port->lport = port_number + 1;
+
+       rocker_port_dev_addr_init(rocker, rocker_port);
+       dev->netdev_ops = &rocker_port_netdev_ops;
+       dev->ethtool_ops = &rocker_port_ethtool_ops;
+       netif_napi_add(dev, &rocker_port->napi_tx, rocker_port_poll_tx,
+                      NAPI_POLL_WEIGHT);
+       netif_napi_add(dev, &rocker_port->napi_rx, rocker_port_poll_rx,
+                      NAPI_POLL_WEIGHT);
+       rocker_carrier_init(rocker_port);
+
+       dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
+
+       err = register_netdev(dev);
+       if (err) {
+               dev_err(&pdev->dev, "register_netdev failed\n");
+               goto err_register_netdev;
+       }
+       rocker->ports[port_number] = rocker_port;
+
+       return 0;
+
+err_register_netdev:
+       free_netdev(dev);
+       return err;
+}
+
+static int rocker_probe_ports(struct rocker *rocker)
+{
+       int i;
+       size_t alloc_size;
+       int err;
+
+       alloc_size = sizeof(struct rocker_port *) * rocker->port_count;
+       rocker->ports = kmalloc(alloc_size, GFP_KERNEL);
+       for (i = 0; i < rocker->port_count; i++) {
+               err = rocker_probe_port(rocker, i);
+               if (err)
+                       goto remove_ports;
+       }
+       return 0;
+
+remove_ports:
+       rocker_remove_ports(rocker);
+       return err;
+}
+
+static int rocker_msix_init(struct rocker *rocker)
+{
+       struct pci_dev *pdev = rocker->pdev;
+       int msix_entries;
+       int i;
+       int err;
+
+       msix_entries = pci_msix_vec_count(pdev);
+       if (msix_entries < 0)
+               return msix_entries;
+
+       if (msix_entries != ROCKER_MSIX_VEC_COUNT(rocker->port_count))
+               return -EINVAL;
+
+       rocker->msix_entries = kmalloc_array(msix_entries,
+                                            sizeof(struct msix_entry),
+                                            GFP_KERNEL);
+       if (!rocker->msix_entries)
+               return -ENOMEM;
+
+       for (i = 0; i < msix_entries; i++)
+               rocker->msix_entries[i].entry = i;
+
+       err = pci_enable_msix_exact(pdev, rocker->msix_entries, msix_entries);
+       if (err < 0)
+               goto err_enable_msix;
+
+       return 0;
+
+err_enable_msix:
+       kfree(rocker->msix_entries);
+       return err;
+}
+
+static void rocker_msix_fini(struct rocker *rocker)
+{
+       pci_disable_msix(rocker->pdev);
+       kfree(rocker->msix_entries);
+}
+
+static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+       struct rocker *rocker;
+       int err;
+
+       rocker = kzalloc(sizeof(*rocker), GFP_KERNEL);
+       if (!rocker)
+               return -ENOMEM;
+
+       err = pci_enable_device(pdev);
+       if (err) {
+               dev_err(&pdev->dev, "pci_enable_device failed\n");
+               goto err_pci_enable_device;
+       }
+
+       err = pci_request_regions(pdev, rocker_driver_name);
+       if (err) {
+               dev_err(&pdev->dev, "pci_request_regions failed\n");
+               goto err_pci_request_regions;
+       }
+
+       err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
+       if (!err) {
+               err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
+               if (err) {
+                       dev_err(&pdev->dev, "pci_set_consistent_dma_mask failed\n");
+                       goto err_pci_set_dma_mask;
+               }
+       } else {
+               err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+               if (err) {
+                       dev_err(&pdev->dev, "pci_set_dma_mask failed\n");
+                       goto err_pci_set_dma_mask;
+               }
+       }
+
+       if (pci_resource_len(pdev, 0) < ROCKER_PCI_BAR0_SIZE) {
+               dev_err(&pdev->dev, "invalid PCI region size\n");
+               goto err_pci_resource_len_check;
+       }
+
+       rocker->hw_addr = ioremap(pci_resource_start(pdev, 0),
+                                 pci_resource_len(pdev, 0));
+       if (!rocker->hw_addr) {
+               dev_err(&pdev->dev, "ioremap failed\n");
+               err = -EIO;
+               goto err_ioremap;
+       }
+       pci_set_master(pdev);
+
+       rocker->pdev = pdev;
+       pci_set_drvdata(pdev, rocker);
+
+       rocker->port_count = rocker_read32(rocker, PORT_PHYS_COUNT);
+
+       err = rocker_msix_init(rocker);
+       if (err) {
+               dev_err(&pdev->dev, "MSI-X init failed\n");
+               goto err_msix_init;
+       }
+
+       err = rocker_basic_hw_test(rocker);
+       if (err) {
+               dev_err(&pdev->dev, "basic hw test failed\n");
+               goto err_basic_hw_test;
+       }
+
+       rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
+
+       err = rocker_dma_rings_init(rocker);
+       if (err)
+               goto err_dma_rings_init;
+
+       err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD),
+                         rocker_cmd_irq_handler, 0,
+                         rocker_driver_name, rocker);
+       if (err) {
+               dev_err(&pdev->dev, "cannot assign cmd irq\n");
+               goto err_request_cmd_irq;
+       }
+
+       err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT),
+                         rocker_event_irq_handler, 0,
+                         rocker_driver_name, rocker);
+       if (err) {
+               dev_err(&pdev->dev, "cannot assign event irq\n");
+               goto err_request_event_irq;
+       }
+
+       rocker->hw.id = rocker_read64(rocker, SWITCH_ID);
+
+       err = rocker_probe_ports(rocker);
+       if (err) {
+               dev_err(&pdev->dev, "failed to probe ports\n");
+               goto err_probe_ports;
+       }
+
+       dev_info(&pdev->dev, "Rocker switch with id %016llx\n", rocker->hw.id);
+
+       return 0;
+
+err_probe_ports:
+       free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
+err_request_event_irq:
+       free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
+err_request_cmd_irq:
+       rocker_dma_rings_fini(rocker);
+err_dma_rings_init:
+err_basic_hw_test:
+       rocker_msix_fini(rocker);
+err_msix_init:
+       iounmap(rocker->hw_addr);
+err_ioremap:
+err_pci_resource_len_check:
+err_pci_set_dma_mask:
+       pci_release_regions(pdev);
+err_pci_request_regions:
+       pci_disable_device(pdev);
+err_pci_enable_device:
+       kfree(rocker);
+       return err;
+}
+
+static void rocker_remove(struct pci_dev *pdev)
+{
+       struct rocker *rocker = pci_get_drvdata(pdev);
+
+       rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
+       rocker_remove_ports(rocker);
+       free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
+       free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
+       rocker_dma_rings_fini(rocker);
+       rocker_msix_fini(rocker);
+       iounmap(rocker->hw_addr);
+       pci_release_regions(rocker->pdev);
+       pci_disable_device(rocker->pdev);
+       kfree(rocker);
+}
+
+static struct pci_driver rocker_pci_driver = {
+       .name           = rocker_driver_name,
+       .id_table       = rocker_pci_id_table,
+       .probe          = rocker_probe,
+       .remove         = rocker_remove,
+};
+
+/***********************
+ * Module init and exit
+ ***********************/
+
+static int __init rocker_module_init(void)
+{
+       return pci_register_driver(&rocker_pci_driver);
+}
+
+static void __exit rocker_module_exit(void)
+{
+       pci_unregister_driver(&rocker_pci_driver);
+}
+
+module_init(rocker_module_init);
+module_exit(rocker_module_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
+MODULE_AUTHOR("Scott Feldman <sfeldma@gmail.com>");
+MODULE_DESCRIPTION("Rocker switch device driver");
+MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);
diff --git a/drivers/net/ethernet/rocker/rocker.h b/drivers/net/ethernet/rocker/rocker.h
new file mode 100644 (file)
index 0000000..5251cf8
--- /dev/null
@@ -0,0 +1,427 @@
+/*
+ * drivers/net/ethernet/rocker/rocker.h - Rocker switch device driver
+ * Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
+ * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef _ROCKER_H
+#define _ROCKER_H
+
+#include <linux/types.h>
+
+#define PCI_VENDOR_ID_REDHAT           0x1b36
+#define PCI_DEVICE_ID_REDHAT_ROCKER    0x0006
+
+#define ROCKER_PCI_BAR0_SIZE           0x2000
+
+/* MSI-X vectors */
+enum {
+       ROCKER_MSIX_VEC_CMD,
+       ROCKER_MSIX_VEC_EVENT,
+       ROCKER_MSIX_VEC_TEST,
+       ROCKER_MSIX_VEC_RESERVED0,
+       __ROCKER_MSIX_VEC_TX,
+       __ROCKER_MSIX_VEC_RX,
+#define ROCKER_MSIX_VEC_TX(port) \
+       (__ROCKER_MSIX_VEC_TX + ((port) * 2))
+#define ROCKER_MSIX_VEC_RX(port) \
+       (__ROCKER_MSIX_VEC_RX + ((port) * 2))
+#define ROCKER_MSIX_VEC_COUNT(portcnt) \
+       (ROCKER_MSIX_VEC_RX((portcnt - 1)) + 1)
+};
+
+/* Rocker bogus registers */
+#define ROCKER_BOGUS_REG0              0x0000
+#define ROCKER_BOGUS_REG1              0x0004
+#define ROCKER_BOGUS_REG2              0x0008
+#define ROCKER_BOGUS_REG3              0x000c
+
+/* Rocker test registers */
+#define ROCKER_TEST_REG                        0x0010
+#define ROCKER_TEST_REG64              0x0018  /* 8-byte */
+#define ROCKER_TEST_IRQ                        0x0020
+#define ROCKER_TEST_DMA_ADDR           0x0028  /* 8-byte */
+#define ROCKER_TEST_DMA_SIZE           0x0030
+#define ROCKER_TEST_DMA_CTRL           0x0034
+
+/* Rocker test register ctrl */
+#define ROCKER_TEST_DMA_CTRL_CLEAR     (1 << 0)
+#define ROCKER_TEST_DMA_CTRL_FILL      (1 << 1)
+#define ROCKER_TEST_DMA_CTRL_INVERT    (1 << 2)
+
+/* Rocker DMA ring register offsets */
+#define ROCKER_DMA_DESC_ADDR(x)                (0x1000 + (x) * 32)  /* 8-byte */
+#define ROCKER_DMA_DESC_SIZE(x)                (0x1008 + (x) * 32)
+#define ROCKER_DMA_DESC_HEAD(x)                (0x100c + (x) * 32)
+#define ROCKER_DMA_DESC_TAIL(x)                (0x1010 + (x) * 32)
+#define ROCKER_DMA_DESC_CTRL(x)                (0x1014 + (x) * 32)
+#define ROCKER_DMA_DESC_CREDITS(x)     (0x1018 + (x) * 32)
+#define ROCKER_DMA_DESC_RES1(x)                (0x101c + (x) * 32)
+
+/* Rocker dma ctrl register bits */
+#define ROCKER_DMA_DESC_CTRL_RESET     (1 << 0)
+
+/* Rocker DMA ring types */
+enum rocker_dma_type {
+       ROCKER_DMA_CMD,
+       ROCKER_DMA_EVENT,
+       __ROCKER_DMA_TX,
+       __ROCKER_DMA_RX,
+#define ROCKER_DMA_TX(port) (__ROCKER_DMA_TX + (port) * 2)
+#define ROCKER_DMA_RX(port) (__ROCKER_DMA_RX + (port) * 2)
+};
+
+/* Rocker DMA ring size limits and default sizes */
+#define ROCKER_DMA_SIZE_MIN            2ul
+#define ROCKER_DMA_SIZE_MAX            65536ul
+#define ROCKER_DMA_CMD_DEFAULT_SIZE    32ul
+#define ROCKER_DMA_EVENT_DEFAULT_SIZE  32ul
+#define ROCKER_DMA_TX_DEFAULT_SIZE     64ul
+#define ROCKER_DMA_TX_DESC_SIZE                256
+#define ROCKER_DMA_RX_DEFAULT_SIZE     64ul
+#define ROCKER_DMA_RX_DESC_SIZE                256
+
+/* Rocker DMA descriptor struct */
+struct rocker_desc {
+       u64 buf_addr;
+       u64 cookie;
+       u16 buf_size;
+       u16 tlv_size;
+       u16 resv[5];
+       u16 comp_err;
+};
+
+#define ROCKER_DMA_DESC_COMP_ERR_GEN   (1 << 15)
+
+/* Rocker DMA TLV struct */
+struct rocker_tlv {
+       u32 type;
+       u16 len;
+};
+
+/* TLVs */
+enum {
+       ROCKER_TLV_CMD_UNSPEC,
+       ROCKER_TLV_CMD_TYPE,    /* u16 */
+       ROCKER_TLV_CMD_INFO,    /* nest */
+
+       __ROCKER_TLV_CMD_MAX,
+       ROCKER_TLV_CMD_MAX = __ROCKER_TLV_CMD_MAX - 1,
+};
+
+enum {
+       ROCKER_TLV_CMD_TYPE_UNSPEC,
+       ROCKER_TLV_CMD_TYPE_GET_PORT_SETTINGS,
+       ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS,
+       ROCKER_TLV_CMD_TYPE_OF_DPA_FLOW_ADD,
+       ROCKER_TLV_CMD_TYPE_OF_DPA_FLOW_MOD,
+       ROCKER_TLV_CMD_TYPE_OF_DPA_FLOW_DEL,
+       ROCKER_TLV_CMD_TYPE_OF_DPA_FLOW_GET_STATS,
+       ROCKER_TLV_CMD_TYPE_OF_DPA_GROUP_ADD,
+       ROCKER_TLV_CMD_TYPE_OF_DPA_GROUP_MOD,
+       ROCKER_TLV_CMD_TYPE_OF_DPA_GROUP_DEL,
+       ROCKER_TLV_CMD_TYPE_OF_DPA_GROUP_GET_STATS,
+
+       __ROCKER_TLV_CMD_TYPE_MAX,
+       ROCKER_TLV_CMD_TYPE_MAX = __ROCKER_TLV_CMD_TYPE_MAX - 1,
+};
+
+enum {
+       ROCKER_TLV_CMD_PORT_SETTINGS_UNSPEC,
+       ROCKER_TLV_CMD_PORT_SETTINGS_LPORT,             /* u32 */
+       ROCKER_TLV_CMD_PORT_SETTINGS_SPEED,             /* u32 */
+       ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX,            /* u8 */
+       ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG,           /* u8 */
+       ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,           /* binary */
+       ROCKER_TLV_CMD_PORT_SETTINGS_MODE,              /* u8 */
+
+       __ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
+       ROCKER_TLV_CMD_PORT_SETTINGS_MAX =
+                       __ROCKER_TLV_CMD_PORT_SETTINGS_MAX - 1,
+};
+
+enum rocker_port_mode {
+       ROCKER_PORT_MODE_OF_DPA,
+};
+
+enum {
+       ROCKER_TLV_EVENT_UNSPEC,
+       ROCKER_TLV_EVENT_TYPE,  /* u16 */
+       ROCKER_TLV_EVENT_INFO,  /* nest */
+
+       __ROCKER_TLV_EVENT_MAX,
+       ROCKER_TLV_EVENT_MAX = __ROCKER_TLV_EVENT_MAX - 1,
+};
+
+enum {
+       ROCKER_TLV_EVENT_TYPE_UNSPEC,
+       ROCKER_TLV_EVENT_TYPE_LINK_CHANGED,
+       ROCKER_TLV_EVENT_TYPE_MAC_VLAN_SEEN,
+
+       __ROCKER_TLV_EVENT_TYPE_MAX,
+       ROCKER_TLV_EVENT_TYPE_MAX = __ROCKER_TLV_EVENT_TYPE_MAX - 1,
+};
+
+enum {
+       ROCKER_TLV_EVENT_LINK_CHANGED_UNSPEC,
+       ROCKER_TLV_EVENT_LINK_CHANGED_LPORT,    /* u32 */
+       ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP,   /* u8 */
+
+       __ROCKER_TLV_EVENT_LINK_CHANGED_MAX,
+       ROCKER_TLV_EVENT_LINK_CHANGED_MAX =
+                       __ROCKER_TLV_EVENT_LINK_CHANGED_MAX - 1,
+};
+
+enum {
+       ROCKER_TLV_EVENT_MAC_VLAN_UNSPEC,
+       ROCKER_TLV_EVENT_MAC_VLAN_LPORT,        /* u32 */
+       ROCKER_TLV_EVENT_MAC_VLAN_MAC,          /* binary */
+       ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID,      /* __be16 */
+
+       __ROCKER_TLV_EVENT_MAC_VLAN_MAX,
+       ROCKER_TLV_EVENT_MAC_VLAN_MAX = __ROCKER_TLV_EVENT_MAC_VLAN_MAX - 1,
+};
+
+enum {
+       ROCKER_TLV_RX_UNSPEC,
+       ROCKER_TLV_RX_FLAGS,            /* u16, see ROCKER_RX_FLAGS_ */
+       ROCKER_TLV_RX_CSUM,             /* u16 */
+       ROCKER_TLV_RX_FRAG_ADDR,        /* u64 */
+       ROCKER_TLV_RX_FRAG_MAX_LEN,     /* u16 */
+       ROCKER_TLV_RX_FRAG_LEN,         /* u16 */
+
+       __ROCKER_TLV_RX_MAX,
+       ROCKER_TLV_RX_MAX = __ROCKER_TLV_RX_MAX - 1,
+};
+
+#define ROCKER_RX_FLAGS_IPV4                   (1 << 0)
+#define ROCKER_RX_FLAGS_IPV6                   (1 << 1)
+#define ROCKER_RX_FLAGS_CSUM_CALC              (1 << 2)
+#define ROCKER_RX_FLAGS_IPV4_CSUM_GOOD         (1 << 3)
+#define ROCKER_RX_FLAGS_IP_FRAG                        (1 << 4)
+#define ROCKER_RX_FLAGS_TCP                    (1 << 5)
+#define ROCKER_RX_FLAGS_UDP                    (1 << 6)
+#define ROCKER_RX_FLAGS_TCP_UDP_CSUM_GOOD      (1 << 7)
+
+enum {
+       ROCKER_TLV_TX_UNSPEC,
+       ROCKER_TLV_TX_OFFLOAD,          /* u8, see ROCKER_TX_OFFLOAD_ */
+       ROCKER_TLV_TX_L3_CSUM_OFF,      /* u16 */
+       ROCKER_TLV_TX_TSO_MSS,          /* u16 */
+       ROCKER_TLV_TX_TSO_HDR_LEN,      /* u16 */
+       ROCKER_TLV_TX_FRAGS,            /* array */
+
+       __ROCKER_TLV_TX_MAX,
+       ROCKER_TLV_TX_MAX = __ROCKER_TLV_TX_MAX - 1,
+};
+
+#define ROCKER_TX_OFFLOAD_NONE         0
+#define ROCKER_TX_OFFLOAD_IP_CSUM      1
+#define ROCKER_TX_OFFLOAD_TCP_UDP_CSUM 2
+#define ROCKER_TX_OFFLOAD_L3_CSUM      3
+#define ROCKER_TX_OFFLOAD_TSO          4
+
+#define ROCKER_TX_FRAGS_MAX            16
+
+enum {
+       ROCKER_TLV_TX_FRAG_UNSPEC,
+       ROCKER_TLV_TX_FRAG,             /* nest */
+
+       __ROCKER_TLV_TX_FRAG_MAX,
+       ROCKER_TLV_TX_FRAG_MAX = __ROCKER_TLV_TX_FRAG_MAX - 1,
+};
+
+enum {
+       ROCKER_TLV_TX_FRAG_ATTR_UNSPEC,
+       ROCKER_TLV_TX_FRAG_ATTR_ADDR,   /* u64 */
+       ROCKER_TLV_TX_FRAG_ATTR_LEN,    /* u16 */
+
+       __ROCKER_TLV_TX_FRAG_ATTR_MAX,
+       ROCKER_TLV_TX_FRAG_ATTR_MAX = __ROCKER_TLV_TX_FRAG_ATTR_MAX - 1,
+};
+
+/* cmd info nested for OF-DPA msgs */
+enum {
+       ROCKER_TLV_OF_DPA_UNSPEC,
+       ROCKER_TLV_OF_DPA_TABLE_ID,             /* u16 */
+       ROCKER_TLV_OF_DPA_PRIORITY,             /* u32 */
+       ROCKER_TLV_OF_DPA_HARDTIME,             /* u32 */
+       ROCKER_TLV_OF_DPA_IDLETIME,             /* u32 */
+       ROCKER_TLV_OF_DPA_COOKIE,               /* u64 */
+       ROCKER_TLV_OF_DPA_IN_LPORT,             /* u32 */
+       ROCKER_TLV_OF_DPA_IN_LPORT_MASK,        /* u32 */
+       ROCKER_TLV_OF_DPA_OUT_LPORT,            /* u32 */
+       ROCKER_TLV_OF_DPA_GOTO_TABLE_ID,        /* u16 */
+       ROCKER_TLV_OF_DPA_GROUP_ID,             /* u32 */
+       ROCKER_TLV_OF_DPA_GROUP_ID_LOWER,       /* u32 */
+       ROCKER_TLV_OF_DPA_GROUP_COUNT,          /* u16 */
+       ROCKER_TLV_OF_DPA_GROUP_IDS,            /* u32 array */
+       ROCKER_TLV_OF_DPA_VLAN_ID,              /* __be16 */
+       ROCKER_TLV_OF_DPA_VLAN_ID_MASK,         /* __be16 */
+       ROCKER_TLV_OF_DPA_VLAN_PCP,             /* __be16 */
+       ROCKER_TLV_OF_DPA_VLAN_PCP_MASK,        /* __be16 */
+       ROCKER_TLV_OF_DPA_VLAN_PCP_ACTION,      /* u8 */
+       ROCKER_TLV_OF_DPA_NEW_VLAN_ID,          /* __be16 */
+       ROCKER_TLV_OF_DPA_NEW_VLAN_PCP,         /* u8 */
+       ROCKER_TLV_OF_DPA_TUNNEL_ID,            /* u32 */
+       ROCKER_TLV_OF_DPA_TUN_LOG_LPORT,        /* u32 */
+       ROCKER_TLV_OF_DPA_ETHERTYPE,            /* __be16 */
+       ROCKER_TLV_OF_DPA_DST_MAC,              /* binary */
+       ROCKER_TLV_OF_DPA_DST_MAC_MASK,         /* binary */
+       ROCKER_TLV_OF_DPA_SRC_MAC,              /* binary */
+       ROCKER_TLV_OF_DPA_SRC_MAC_MASK,         /* binary */
+       ROCKER_TLV_OF_DPA_IP_PROTO,             /* u8 */
+       ROCKER_TLV_OF_DPA_IP_PROTO_MASK,        /* u8 */
+       ROCKER_TLV_OF_DPA_IP_DSCP,              /* u8 */
+       ROCKER_TLV_OF_DPA_IP_DSCP_MASK,         /* u8 */
+       ROCKER_TLV_OF_DPA_IP_DSCP_ACTION,       /* u8 */
+       ROCKER_TLV_OF_DPA_NEW_IP_DSCP,          /* u8 */
+       ROCKER_TLV_OF_DPA_IP_ECN,               /* u8 */
+       ROCKER_TLV_OF_DPA_IP_ECN_MASK,          /* u8 */
+       ROCKER_TLV_OF_DPA_DST_IP,               /* __be32 */
+       ROCKER_TLV_OF_DPA_DST_IP_MASK,          /* __be32 */
+       ROCKER_TLV_OF_DPA_SRC_IP,               /* __be32 */
+       ROCKER_TLV_OF_DPA_SRC_IP_MASK,          /* __be32 */
+       ROCKER_TLV_OF_DPA_DST_IPV6,             /* binary */
+       ROCKER_TLV_OF_DPA_DST_IPV6_MASK,        /* binary */
+       ROCKER_TLV_OF_DPA_SRC_IPV6,             /* binary */
+       ROCKER_TLV_OF_DPA_SRC_IPV6_MASK,        /* binary */
+       ROCKER_TLV_OF_DPA_SRC_ARP_IP,           /* __be32 */
+       ROCKER_TLV_OF_DPA_SRC_ARP_IP_MASK,      /* __be32 */
+       ROCKER_TLV_OF_DPA_L4_DST_PORT,          /* __be16 */
+       ROCKER_TLV_OF_DPA_L4_DST_PORT_MASK,     /* __be16 */
+       ROCKER_TLV_OF_DPA_L4_SRC_PORT,          /* __be16 */
+       ROCKER_TLV_OF_DPA_L4_SRC_PORT_MASK,     /* __be16 */
+       ROCKER_TLV_OF_DPA_ICMP_TYPE,            /* u8 */
+       ROCKER_TLV_OF_DPA_ICMP_TYPE_MASK,       /* u8 */
+       ROCKER_TLV_OF_DPA_ICMP_CODE,            /* u8 */
+       ROCKER_TLV_OF_DPA_ICMP_CODE_MASK,       /* u8 */
+       ROCKER_TLV_OF_DPA_IPV6_LABEL,           /* __be32 */
+       ROCKER_TLV_OF_DPA_IPV6_LABEL_MASK,      /* __be32 */
+       ROCKER_TLV_OF_DPA_QUEUE_ID_ACTION,      /* u8 */
+       ROCKER_TLV_OF_DPA_NEW_QUEUE_ID,         /* u8 */
+       ROCKER_TLV_OF_DPA_CLEAR_ACTIONS,        /* u32 */
+       ROCKER_TLV_OF_DPA_POP_VLAN,             /* u8 */
+       ROCKER_TLV_OF_DPA_TTL_CHECK,            /* u8 */
+       ROCKER_TLV_OF_DPA_COPY_CPU_ACTION,      /* u8 */
+
+       __ROCKER_TLV_OF_DPA_MAX,
+       ROCKER_TLV_OF_DPA_MAX = __ROCKER_TLV_OF_DPA_MAX - 1,
+};
+
+/* OF-DPA table IDs */
+
+enum rocker_of_dpa_table_id {
+       ROCKER_OF_DPA_TABLE_ID_INGRESS_PORT = 0,
+       ROCKER_OF_DPA_TABLE_ID_VLAN = 10,
+       ROCKER_OF_DPA_TABLE_ID_TERMINATION_MAC = 20,
+       ROCKER_OF_DPA_TABLE_ID_UNICAST_ROUTING = 30,
+       ROCKER_OF_DPA_TABLE_ID_MULTICAST_ROUTING = 40,
+       ROCKER_OF_DPA_TABLE_ID_BRIDGING = 50,
+       ROCKER_OF_DPA_TABLE_ID_ACL_POLICY = 60,
+};
+
+/* OF-DPA flow stats */
+enum {
+       ROCKER_TLV_OF_DPA_FLOW_STAT_UNSPEC,
+       ROCKER_TLV_OF_DPA_FLOW_STAT_DURATION,   /* u32 */
+       ROCKER_TLV_OF_DPA_FLOW_STAT_RX_PKTS,    /* u64 */
+       ROCKER_TLV_OF_DPA_FLOW_STAT_TX_PKTS,    /* u64 */
+
+       __ROCKER_TLV_OF_DPA_FLOW_STAT_MAX,
+       ROCKER_TLV_OF_DPA_FLOW_STAT_MAX = __ROCKER_TLV_OF_DPA_FLOW_STAT_MAX - 1,
+};
+
+/* OF-DPA group types */
+enum rocker_of_dpa_group_type {
+       ROCKER_OF_DPA_GROUP_TYPE_L2_INTERFACE = 0,
+       ROCKER_OF_DPA_GROUP_TYPE_L2_REWRITE,
+       ROCKER_OF_DPA_GROUP_TYPE_L3_UCAST,
+       ROCKER_OF_DPA_GROUP_TYPE_L2_MCAST,
+       ROCKER_OF_DPA_GROUP_TYPE_L2_FLOOD,
+       ROCKER_OF_DPA_GROUP_TYPE_L3_INTERFACE,
+       ROCKER_OF_DPA_GROUP_TYPE_L3_MCAST,
+       ROCKER_OF_DPA_GROUP_TYPE_L3_ECMP,
+       ROCKER_OF_DPA_GROUP_TYPE_L2_OVERLAY,
+};
+
+/* OF-DPA group L2 overlay types */
+enum rocker_of_dpa_overlay_type {
+       ROCKER_OF_DPA_OVERLAY_TYPE_FLOOD_UCAST = 0,
+       ROCKER_OF_DPA_OVERLAY_TYPE_FLOOD_MCAST,
+       ROCKER_OF_DPA_OVERLAY_TYPE_MCAST_UCAST,
+       ROCKER_OF_DPA_OVERLAY_TYPE_MCAST_MCAST,
+};
+
+/* OF-DPA group ID encoding */
+#define ROCKER_GROUP_TYPE_SHIFT 28
+#define ROCKER_GROUP_TYPE_MASK 0xf0000000
+#define ROCKER_GROUP_VLAN_SHIFT 16
+#define ROCKER_GROUP_VLAN_MASK 0x0fff0000
+#define ROCKER_GROUP_PORT_SHIFT 0
+#define ROCKER_GROUP_PORT_MASK 0x0000ffff
+#define ROCKER_GROUP_TUNNEL_ID_SHIFT 12
+#define ROCKER_GROUP_TUNNEL_ID_MASK 0x0ffff000
+#define ROCKER_GROUP_SUBTYPE_SHIFT 10
+#define ROCKER_GROUP_SUBTYPE_MASK 0x00000c00
+#define ROCKER_GROUP_INDEX_SHIFT 0
+#define ROCKER_GROUP_INDEX_MASK 0x0000ffff
+#define ROCKER_GROUP_INDEX_LONG_SHIFT 0
+#define ROCKER_GROUP_INDEX_LONG_MASK 0x0fffffff
+
+#define ROCKER_GROUP_TYPE_GET(group_id) \
+       (((group_id) & ROCKER_GROUP_TYPE_MASK) >> ROCKER_GROUP_TYPE_SHIFT)
+#define ROCKER_GROUP_TYPE_SET(type) \
+       (((type) << ROCKER_GROUP_TYPE_SHIFT) & ROCKER_GROUP_TYPE_MASK)
+#define ROCKER_GROUP_VLAN_GET(group_id) \
+       (((group_id) & ROCKER_GROUP_VLAN_ID_MASK) >> ROCKER_GROUP_VLAN_ID_SHIFT)
+#define ROCKER_GROUP_VLAN_SET(vlan_id) \
+       (((vlan_id) << ROCKER_GROUP_VLAN_SHIFT) & ROCKER_GROUP_VLAN_MASK)
+#define ROCKER_GROUP_PORT_GET(group_id) \
+       (((group_id) & ROCKER_GROUP_PORT_MASK) >> ROCKER_GROUP_PORT_SHIFT)
+#define ROCKER_GROUP_PORT_SET(port) \
+       (((port) << ROCKER_GROUP_PORT_SHIFT) & ROCKER_GROUP_PORT_MASK)
+#define ROCKER_GROUP_INDEX_GET(group_id) \
+       (((group_id) & ROCKER_GROUP_INDEX_MASK) >> ROCKER_GROUP_INDEX_SHIFT)
+#define ROCKER_GROUP_INDEX_SET(index) \
+       (((index) << ROCKER_GROUP_INDEX_SHIFT) & ROCKER_GROUP_INDEX_MASK)
+#define ROCKER_GROUP_INDEX_LONG_GET(group_id) \
+       (((group_id) & ROCKER_GROUP_INDEX_LONG_MASK) >> \
+        ROCKER_GROUP_INDEX_LONG_SHIFT)
+#define ROCKER_GROUP_INDEX_LONG_SET(index) \
+       (((index) << ROCKER_GROUP_INDEX_LONG_SHIFT) & \
+        ROCKER_GROUP_INDEX_LONG_MASK)
+
+#define ROCKER_GROUP_NONE 0
+#define ROCKER_GROUP_L2_INTERFACE(vlan_id, port) \
+       (ROCKER_GROUP_TYPE_SET(ROCKER_OF_DPA_GROUP_TYPE_L2_INTERFACE) |\
+        ROCKER_GROUP_VLAN_SET(ntohs(vlan_id)) | ROCKER_GROUP_PORT_SET(port))
+#define ROCKER_GROUP_L2_REWRITE(index) \
+       (ROCKER_GROUP_TYPE_SET(ROCKER_OF_DPA_GROUP_TYPE_L2_REWRITE) |\
+        ROCKER_GROUP_INDEX_LONG_SET(index))
+#define ROCKER_GROUP_L2_MCAST(vlan_id, index) \
+       (ROCKER_GROUP_TYPE_SET(ROCKER_OF_DPA_GROUP_TYPE_L2_MCAST) |\
+        ROCKER_GROUP_VLAN_SET(ntohs(vlan_id)) | ROCKER_GROUP_INDEX_SET(index))
+#define ROCKER_GROUP_L2_FLOOD(vlan_id, index) \
+       (ROCKER_GROUP_TYPE_SET(ROCKER_OF_DPA_GROUP_TYPE_L2_FLOOD) |\
+       ROCKER_GROUP_VLAN_SET(ntohs(vlan_id)) | ROCKER_GROUP_INDEX_SET(index))
+#define ROCKER_GROUP_L3_UNICAST(index) \
+       (ROCKER_GROUP_TYPE_SET(ROCKER_OF_DPA_GROUP_TYPE_L3_UCAST) |\
+        ROCKER_GROUP_INDEX_LONG_SET(index))
+
+/* Rocker general purpose registers */
+#define ROCKER_CONTROL                 0x0300
+#define ROCKER_PORT_PHYS_COUNT         0x0304
+#define ROCKER_PORT_PHYS_LINK_STATUS   0x0310 /* 8-byte */
+#define ROCKER_PORT_PHYS_ENABLE                0x0318 /* 8-byte */
+#define ROCKER_SWITCH_ID               0x0320 /* 8-byte */
+
+/* Rocker control bits */
+#define ROCKER_CONTROL_RESET           (1 << 0)
+
+#endif