Neterion: New driver: Hardware init & configuration

This patch takes care of Initialization and configuration steps of
Neterion Inc's X3100 Series 10GbE PCIe I/O Virtualized Server Adapter.
- Device Initialization.
- Verification and setting of device config parameters.
- Allocation of Tx FIFO and Rx Ring descriptors (DTR).
- APIs to get various type of hw stats
- APIs to configure RTS (Receive Traffic Steering)

- Changes in this submission -
        - Include vmalloc header without which a compilation error occured
          on sparc64, ppc64 and IA64 plaforms.
	- Fixed compilation warning in register_poll, write32_upper,
          write32_lower and the special write64 functions on ppc64.
        - General cleanup - removed redundant includes and defines.

- Changes in previous submissions -
        - Add readq/writeq implementation for the driver for 32 bit systems -
          reported by Dave Miller.
- Incorporated following comments from Ben Hutchings
        - Start a comment with "/**" to make it a kernel-doc comment.
        - Use prefix, "__vxge" in front of hw functions to make them globally
          unique.
        - Fixed unnecessary clearing members of *channel just before freeing
        - Use backslashes only for macro definitions and not in multi-line
          statements.
        - Used pci_find_capability instead of redefining it.
        - Used device and revision ids that are already in pdev - no need to
          read them again.
        - Used pci_save_state() and pci_restore_state() around resets.
        - Used udelay and mdelay directly instead of wrapper.
        - In __vxge_hw_device_register_poll() reset i to 0 after the
          microsecond delay loop to commence the millisecond delay loop.
        - Corrected spelling "sapper" - should be "swapper"
        - Remove too much vertical whitespace.
        - Replaced magic numbers with appropriate macros
- Incorporated following comments from Andi Kleen [andi@firstfloor.org]
        - Reduced the arguments in functions or refactored them into smaller
        functions.
        - Allocate page sized memories used in slow path with vmalloc.
        - Use asserts where necessary.
        - Use macros instead of magic numbers.
        - Use the pci layer code instead of defining own functions
        - Remove driver wrappers such as xge_hw_device_private_set().
        - Fixed sparse warnings.
Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com>
Signed-off-by: Rastapur Santosh <santosh.rastapur@neterion.com>
Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/vxge/vxge-config.h

+/******************************************************************************
+ * This software may be used and distributed according to the terms of
+ * the GNU General Public License (GPL), incorporated herein by reference.
+ * Drivers based on or derived from this code fall under the GPL and must
+ * retain the authorship, copyright and license notice.  This file is not
+ * a complete program and may only be used when the entire operating
+ * system is licensed under the GPL.
+ * See the file COPYING in this distribution for more information.
+ *
+ * vxge-config.h: Driver for Neterion Inc's X3100 Series 10GbE PCIe I/O
+ *                Virtualized Server Adapter.
+ * Copyright(c) 2002-2009 Neterion Inc.
+ ******************************************************************************/
+#ifndef VXGE_CONFIG_H
+#define VXGE_CONFIG_H
+#include <linux/list.h>
+
+#ifndef VXGE_CACHE_LINE_SIZE
+#define VXGE_CACHE_LINE_SIZE 128
+#endif
+
+#define vxge_os_vaprintf(level, mask, fmt, ...) { \
+	char buff[255]; \
+		snprintf(buff, 255, fmt, __VA_ARGS__); \
+		printk(buff); \
+		printk("\n"); \
+}
+
+#ifndef VXGE_ALIGN
+#define VXGE_ALIGN(adrs, size) \
+	(((size) - (((u64)adrs) & ((size)-1))) & ((size)-1))
+#endif
+
+#define VXGE_HW_MIN_MTU				68
+#define VXGE_HW_MAX_MTU				9600
+#define VXGE_HW_DEFAULT_MTU			1500
+
+#ifdef VXGE_DEBUG_ASSERT
+
+/**
+ * vxge_assert
+ * @test: C-condition to check
+ * @fmt: printf like format string
+ *
+ * This function implements traditional assert. By default assertions
+ * are enabled. It can be disabled by undefining VXGE_DEBUG_ASSERT macro in
+ * compilation
+ * time.
+ */
+#define vxge_assert(test) { \
+	if (!(test)) \
+		vxge_os_bug("bad cond: "#test" at %s:%d\n", \
+				__FILE__, __LINE__); }
+#else
+#define vxge_assert(test)
+#endif /* end of VXGE_DEBUG_ASSERT */
+
+/**
+ * enum enum vxge_debug_level
+ * @VXGE_NONE: debug disabled
+ * @VXGE_ERR: all errors going to be logged out
+ * @VXGE_TRACE: all errors plus all kind of verbose tracing print outs
+ *                 going to be logged out. Very noisy.
+ *
+ * This enumeration going to be used to switch between different
+ * debug levels during runtime if DEBUG macro defined during
+ * compilation. If DEBUG macro not defined than code will be
+ * compiled out.
+ */
+enum vxge_debug_level {
+	VXGE_NONE   = 0,
+	VXGE_TRACE  = 1,
+	VXGE_ERR    = 2
+};
+
+#define NULL_VPID					0xFFFFFFFF
+#ifdef CONFIG_VXGE_DEBUG_TRACE_ALL
+#define VXGE_DEBUG_MODULE_MASK  0xffffffff
+#define VXGE_DEBUG_TRACE_MASK   0xffffffff
+#define VXGE_DEBUG_ERR_MASK     0xffffffff
+#define VXGE_DEBUG_MASK         0x000001ff
+#else
+#define VXGE_DEBUG_MODULE_MASK  0x20000000
+#define VXGE_DEBUG_TRACE_MASK   0x20000000
+#define VXGE_DEBUG_ERR_MASK     0x20000000
+#define VXGE_DEBUG_MASK         0x00000001
+#endif
+
+/*
+ * @VXGE_COMPONENT_LL: do debug for vxge link layer module
+ * @VXGE_COMPONENT_ALL: activate debug for all modules with no exceptions
+ *
+ * This enumeration going to be used to distinguish modules
+ * or libraries during compilation and runtime.  Makefile must declare
+ * VXGE_DEBUG_MODULE_MASK macro and set it to proper value.
+ */
+#define	VXGE_COMPONENT_LL				0x20000000
+#define	VXGE_COMPONENT_ALL				0xffffffff
+
+#define VXGE_HW_BASE_INF	100
+#define VXGE_HW_BASE_ERR	200
+#define VXGE_HW_BASE_BADCFG	300
+
+enum vxge_hw_status {
+	VXGE_HW_OK				  = 0,
+	VXGE_HW_FAIL				  = 1,
+	VXGE_HW_PENDING				  = 2,
+	VXGE_HW_COMPLETIONS_REMAIN		  = 3,
+
+	VXGE_HW_INF_NO_MORE_COMPLETED_DESCRIPTORS = VXGE_HW_BASE_INF + 1,
+	VXGE_HW_INF_OUT_OF_DESCRIPTORS		  = VXGE_HW_BASE_INF + 2,
+
+	VXGE_HW_ERR_INVALID_HANDLE		  = VXGE_HW_BASE_ERR + 1,
+	VXGE_HW_ERR_OUT_OF_MEMORY		  = VXGE_HW_BASE_ERR + 2,
+	VXGE_HW_ERR_VPATH_NOT_AVAILABLE	  	  = VXGE_HW_BASE_ERR + 3,
+	VXGE_HW_ERR_VPATH_NOT_OPEN		  = VXGE_HW_BASE_ERR + 4,
+	VXGE_HW_ERR_WRONG_IRQ			  = VXGE_HW_BASE_ERR + 5,
+	VXGE_HW_ERR_SWAPPER_CTRL		  = VXGE_HW_BASE_ERR + 6,
+	VXGE_HW_ERR_INVALID_MTU_SIZE		  = VXGE_HW_BASE_ERR + 7,
+	VXGE_HW_ERR_INVALID_INDEX		  = VXGE_HW_BASE_ERR + 8,
+	VXGE_HW_ERR_INVALID_TYPE		  = VXGE_HW_BASE_ERR + 9,
+	VXGE_HW_ERR_INVALID_OFFSET		  = VXGE_HW_BASE_ERR + 10,
+	VXGE_HW_ERR_INVALID_DEVICE		  = VXGE_HW_BASE_ERR + 11,
+	VXGE_HW_ERR_VERSION_CONFLICT		  = VXGE_HW_BASE_ERR + 12,
+	VXGE_HW_ERR_INVALID_PCI_INFO		  = VXGE_HW_BASE_ERR + 13,
+	VXGE_HW_ERR_INVALID_TCODE 		  = VXGE_HW_BASE_ERR + 14,
+	VXGE_HW_ERR_INVALID_BLOCK_SIZE		  = VXGE_HW_BASE_ERR + 15,
+	VXGE_HW_ERR_INVALID_STATE		  = VXGE_HW_BASE_ERR + 16,
+	VXGE_HW_ERR_PRIVILAGED_OPEARATION	  = VXGE_HW_BASE_ERR + 17,
+	VXGE_HW_ERR_INVALID_PORT 		  = VXGE_HW_BASE_ERR + 18,
+	VXGE_HW_ERR_FIFO		 	  = VXGE_HW_BASE_ERR + 19,
+	VXGE_HW_ERR_VPATH			  = VXGE_HW_BASE_ERR + 20,
+	VXGE_HW_ERR_CRITICAL			  = VXGE_HW_BASE_ERR + 21,
+	VXGE_HW_ERR_SLOT_FREEZE 		  = VXGE_HW_BASE_ERR + 22,
+
+	VXGE_HW_BADCFG_RING_INDICATE_MAX_PKTS	  = VXGE_HW_BASE_BADCFG + 1,
+	VXGE_HW_BADCFG_FIFO_BLOCKS		  = VXGE_HW_BASE_BADCFG + 2,
+	VXGE_HW_BADCFG_VPATH_MTU		  = VXGE_HW_BASE_BADCFG + 3,
+	VXGE_HW_BADCFG_VPATH_RPA_STRIP_VLAN_TAG	  = VXGE_HW_BASE_BADCFG + 4,
+	VXGE_HW_BADCFG_VPATH_MIN_BANDWIDTH	  = VXGE_HW_BASE_BADCFG + 5,
+	VXGE_HW_BADCFG_INTR_MODE		  = VXGE_HW_BASE_BADCFG + 6,
+	VXGE_HW_BADCFG_RTS_MAC_EN		  = VXGE_HW_BASE_BADCFG + 7,
+
+	VXGE_HW_EOF_TRACE_BUF			  = -1
+};
+
+/**
+ * enum enum vxge_hw_device_link_state - Link state enumeration.
+ * @VXGE_HW_LINK_NONE: Invalid link state.
+ * @VXGE_HW_LINK_DOWN: Link is down.
+ * @VXGE_HW_LINK_UP: Link is up.
+ *
+ */
+enum vxge_hw_device_link_state {
+	VXGE_HW_LINK_NONE,
+	VXGE_HW_LINK_DOWN,
+	VXGE_HW_LINK_UP
+};
+
+/**
+ * struct vxge_hw_device_date - Date Format
+ * @day: Day
+ * @month: Month
+ * @year: Year
+ * @date: Date in string format
+ *
+ * Structure for returning date
+ */
+
+#define VXGE_HW_FW_STRLEN	32
+struct vxge_hw_device_date {
+	u32     day;
+	u32     month;
+	u32     year;
+	char    date[VXGE_HW_FW_STRLEN];
+};
+
+struct vxge_hw_device_version {
+	u32     major;
+	u32     minor;
+	u32     build;
+	char    version[VXGE_HW_FW_STRLEN];
+};
+
+u64
+__vxge_hw_vpath_pci_func_mode_get(
+	u32 vp_id,
+	struct vxge_hw_vpath_reg __iomem *vpath_reg);
+
+/**
+ * struct vxge_hw_fifo_config - Configuration of fifo.
+ * @enable: Is this fifo to be commissioned
+ * @fifo_blocks: Numbers of TxDL (that is, lists of Tx descriptors)
+ * 		blocks per queue.
+ * @max_frags: Max number of Tx buffers per TxDL (that is, per single
+ *             transmit operation).
+ *             No more than 256 transmit buffers can be specified.
+ * @memblock_size: Fifo descriptors are allocated in blocks of @mem_block_size
+ *             bytes. Setting @memblock_size to page size ensures
+ *             by-page allocation of descriptors. 128K bytes is the
+ *             maximum supported block size.
+ * @alignment_size: per Tx fragment DMA-able memory used to align transmit data
+ *             (e.g., to align on a cache line).
+ * @intr: Boolean. Use 1 to generate interrupt for each completed TxDL.
+ *             Use 0 otherwise.
+ * @no_snoop_bits: If non-zero, specifies no-snoop PCI operation,
+ *             which generally improves latency of the host bridge operation
+ *             (see PCI specification). For valid values please refer
+ *             to struct vxge_hw_fifo_config{} in the driver sources.
+ * Configuration of all Titan fifos.
+ * Note: Valid (min, max) range for each attribute is specified in the body of
+ * the struct vxge_hw_fifo_config{} structure.
+ */
+struct vxge_hw_fifo_config {
+	u32				enable;
+#define VXGE_HW_FIFO_ENABLE				1
+#define VXGE_HW_FIFO_DISABLE				0
+
+	u32				fifo_blocks;
+#define VXGE_HW_MIN_FIFO_BLOCKS				2
+#define VXGE_HW_MAX_FIFO_BLOCKS				128
+
+	u32				max_frags;
+#define VXGE_HW_MIN_FIFO_FRAGS				1
+#define VXGE_HW_MAX_FIFO_FRAGS				256
+
+	u32				memblock_size;
+#define VXGE_HW_MIN_FIFO_MEMBLOCK_SIZE			VXGE_HW_BLOCK_SIZE
+#define VXGE_HW_MAX_FIFO_MEMBLOCK_SIZE			131072
+#define VXGE_HW_DEF_FIFO_MEMBLOCK_SIZE			8096
+
+	u32		                alignment_size;
+#define VXGE_HW_MIN_FIFO_ALIGNMENT_SIZE		0
+#define VXGE_HW_MAX_FIFO_ALIGNMENT_SIZE		65536
+#define VXGE_HW_DEF_FIFO_ALIGNMENT_SIZE		VXGE_CACHE_LINE_SIZE
+
+	u32		                intr;
+#define VXGE_HW_FIFO_QUEUE_INTR_ENABLE			1
+#define VXGE_HW_FIFO_QUEUE_INTR_DISABLE			0
+#define VXGE_HW_FIFO_QUEUE_INTR_DEFAULT			0
+
+	u32				no_snoop_bits;
+#define VXGE_HW_FIFO_NO_SNOOP_DISABLED			0
+#define VXGE_HW_FIFO_NO_SNOOP_TXD			1
+#define VXGE_HW_FIFO_NO_SNOOP_FRM			2
+#define VXGE_HW_FIFO_NO_SNOOP_ALL			3
+#define VXGE_HW_FIFO_NO_SNOOP_DEFAULT			0
+
+};
+/**
+ * struct vxge_hw_ring_config - Ring configurations.
+ * @enable: Is this ring to be commissioned
+ * @ring_blocks: Numbers of RxD blocks in the ring
+ * @buffer_mode: Receive buffer mode (1, 2, 3, or 5); for details please refer
+ *             to Titan User Guide.
+ * @scatter_mode: Titan supports two receive scatter modes: A and B.
+ *             For details please refer to Titan User Guide.
+ * @rx_timer_val: The number of 32ns periods that would be counted between two
+ *             timer interrupts.
+ * @greedy_return: If Set it forces the device to return absolutely all RxD
+ *             that are consumed and still on board when a timer interrupt
+ *             triggers. If Clear, then if the device has already returned
+ *             RxD before current timer interrupt trigerred and after the
+ *             previous timer interrupt triggered, then the device is not
+ *             forced to returned the rest of the consumed RxD that it has
+ *             on board which account for a byte count less than the one
+ *             programmed into PRC_CFG6.RXD_CRXDT field
+ * @rx_timer_ci: TBD
+ * @backoff_interval_us: Time (in microseconds), after which Titan
+ *             tries to download RxDs posted by the host.
+ *             Note that the "backoff" does not happen if host posts receive
+ *             descriptors in the timely fashion.
+ * Ring configuration.
+ */
+struct vxge_hw_ring_config {
+	u32				enable;
+#define VXGE_HW_RING_ENABLE					1
+#define VXGE_HW_RING_DISABLE					0
+#define VXGE_HW_RING_DEFAULT					1
+
+	u32				ring_blocks;
+#define VXGE_HW_MIN_RING_BLOCKS				1
+#define VXGE_HW_MAX_RING_BLOCKS				128
+#define VXGE_HW_DEF_RING_BLOCKS				2
+
+	u32				buffer_mode;
+#define VXGE_HW_RING_RXD_BUFFER_MODE_1				1
+#define VXGE_HW_RING_RXD_BUFFER_MODE_3				3
+#define VXGE_HW_RING_RXD_BUFFER_MODE_5				5
+#define VXGE_HW_RING_RXD_BUFFER_MODE_DEFAULT			1
+
+	u32				scatter_mode;
+#define VXGE_HW_RING_SCATTER_MODE_A				0
+#define VXGE_HW_RING_SCATTER_MODE_B				1
+#define VXGE_HW_RING_SCATTER_MODE_C				2
+#define VXGE_HW_RING_SCATTER_MODE_USE_FLASH_DEFAULT		0xffffffff
+
+	u64				rxds_limit;
+#define VXGE_HW_DEF_RING_RXDS_LIMIT				44
+};
+
+/**
+ * struct vxge_hw_vp_config - Configuration of virtual path
+ * @vp_id: Virtual Path Id
+ * @min_bandwidth: Minimum Guaranteed bandwidth
+ * @ring: See struct vxge_hw_ring_config{}.
+ * @fifo: See struct vxge_hw_fifo_config{}.
+ * @tti: Configuration of interrupt associated with Transmit.
+ *             see struct vxge_hw_tim_intr_config();
+ * @rti: Configuration of interrupt associated with Receive.
+ *              see struct vxge_hw_tim_intr_config();
+ * @mtu: mtu size used on this port.
+ * @rpa_strip_vlan_tag: Strip VLAN Tag enable/disable. Instructs the device to
+ *             remove the VLAN tag from all received tagged frames that are not
+ *             replicated at the internal L2 switch.
+ *             0 - Do not strip the VLAN tag.
+ *             1 - Strip the VLAN tag. Regardless of this setting, VLAN tags are
+ *                 always placed into the RxDMA descriptor.
+ *
+ * This structure is used by the driver to pass the configuration parameters to
+ * configure Virtual Path.
+ */
+struct vxge_hw_vp_config {
+	u32				vp_id;
+
+#define	VXGE_HW_VPATH_PRIORITY_MIN			0
+#define	VXGE_HW_VPATH_PRIORITY_MAX			16
+#define	VXGE_HW_VPATH_PRIORITY_DEFAULT			0
+
+	u32				min_bandwidth;
+#define	VXGE_HW_VPATH_BANDWIDTH_MIN			0
+#define	VXGE_HW_VPATH_BANDWIDTH_MAX			100
+#define	VXGE_HW_VPATH_BANDWIDTH_DEFAULT			0
+
+	struct vxge_hw_ring_config		ring;
+	struct vxge_hw_fifo_config		fifo;
+	struct vxge_hw_tim_intr_config	tti;
+	struct vxge_hw_tim_intr_config	rti;
+
+	u32				mtu;
+#define VXGE_HW_VPATH_MIN_INITIAL_MTU			VXGE_HW_MIN_MTU
+#define VXGE_HW_VPATH_MAX_INITIAL_MTU			VXGE_HW_MAX_MTU
+#define VXGE_HW_VPATH_USE_FLASH_DEFAULT_INITIAL_MTU	0xffffffff
+
+	u32				rpa_strip_vlan_tag;
+#define VXGE_HW_VPATH_RPA_STRIP_VLAN_TAG_ENABLE			1
+#define VXGE_HW_VPATH_RPA_STRIP_VLAN_TAG_DISABLE		0
+#define VXGE_HW_VPATH_RPA_STRIP_VLAN_TAG_USE_FLASH_DEFAULT	0xffffffff
+
+};
+/**
+ * struct vxge_hw_device_config - Device configuration.
+ * @dma_blockpool_initial: Initial size of DMA Pool
+ * @dma_blockpool_max: Maximum blocks in DMA pool
+ * @intr_mode: Line, or MSI-X interrupt.
+ *
+ * @rth_en: Enable Receive Traffic Hashing(RTH) using IT(Indirection Table).
+ * @rth_it_type: RTH IT table programming type
+ * @rts_mac_en: Enable Receive Traffic Steering using MAC destination address
+ * @vp_config: Configuration for virtual paths
+ * @device_poll_millis: Specify the interval (in mulliseconds)
+ * 			to wait for register reads
+ *
+ * Titan configuration.
+ * Contains per-device configuration parameters, including:
+ * - stats sampling interval, etc.
+ *
+ * In addition, struct vxge_hw_device_config{} includes "subordinate"
+ * configurations, including:
+ * - fifos and rings;
+ * - MAC (done at firmware level).
+ *
+ * See Titan User Guide for more details.
+ * Note: Valid (min, max) range for each attribute is specified in the body of
+ * the struct vxge_hw_device_config{} structure. Please refer to the
+ * corresponding include file.
+ * See also: struct vxge_hw_tim_intr_config{}.
+ */
+struct vxge_hw_device_config {
+	u32				dma_blockpool_initial;
+	u32				dma_blockpool_max;
+#define VXGE_HW_MIN_DMA_BLOCK_POOL_SIZE			0
+#define VXGE_HW_INITIAL_DMA_BLOCK_POOL_SIZE		0
+#define VXGE_HW_INCR_DMA_BLOCK_POOL_SIZE		4
+#define VXGE_HW_MAX_DMA_BLOCK_POOL_SIZE			4096
+
+#define        VXGE_HW_MAX_PAYLOAD_SIZE_512		2
+
+	u32				intr_mode;
+#define VXGE_HW_INTR_MODE_IRQLINE			0
+#define VXGE_HW_INTR_MODE_MSIX				1
+#define VXGE_HW_INTR_MODE_MSIX_ONE_SHOT			2
+
+#define VXGE_HW_INTR_MODE_DEF				0
+
+	u32				rth_en;
+#define VXGE_HW_RTH_DISABLE				0
+#define VXGE_HW_RTH_ENABLE				1
+#define VXGE_HW_RTH_DEFAULT				0
+
+	u32				rth_it_type;
+#define VXGE_HW_RTH_IT_TYPE_SOLO_IT			0
+#define VXGE_HW_RTH_IT_TYPE_MULTI_IT			1
+#define VXGE_HW_RTH_IT_TYPE_DEFAULT			0
+
+	u32				rts_mac_en;
+#define VXGE_HW_RTS_MAC_DISABLE			0
+#define VXGE_HW_RTS_MAC_ENABLE			1
+#define VXGE_HW_RTS_MAC_DEFAULT			0
+
+	struct vxge_hw_vp_config	vp_config[VXGE_HW_MAX_VIRTUAL_PATHS];
+
+	u32				device_poll_millis;
+#define VXGE_HW_MIN_DEVICE_POLL_MILLIS			1
+#define VXGE_HW_MAX_DEVICE_POLL_MILLIS			100000
+#define VXGE_HW_DEF_DEVICE_POLL_MILLIS			1000
+
+};
+
+/**
+ * function vxge_uld_link_up_f - Link-Up callback provided by driver.
+ * @devh: HW device handle.
+ * Link-up notification callback provided by the driver.
+ * This is one of the per-driver callbacks, see struct vxge_hw_uld_cbs{}.
+ *
+ * See also: struct vxge_hw_uld_cbs{}, vxge_uld_link_down_f{},
+ * vxge_hw_driver_initialize().
+ */
+
+/**
+ * function vxge_uld_link_down_f - Link-Down callback provided by
+ * driver.
+ * @devh: HW device handle.
+ *
+ * Link-Down notification callback provided by the driver.
+ * This is one of the per-driver callbacks, see struct vxge_hw_uld_cbs{}.
+ *
+ * See also: struct vxge_hw_uld_cbs{}, vxge_uld_link_up_f{},
+ * vxge_hw_driver_initialize().
+ */
+
+/**
+ * function vxge_uld_crit_err_f - Critical Error notification callback.
+ * @devh: HW device handle.
+ * (typically - at HW device iinitialization time).
+ * @type: Enumerated hw error, e.g.: double ECC.
+ * @serr_data: Titan status.
+ * @ext_data: Extended data. The contents depends on the @type.
+ *
+ * Link-Down notification callback provided by the driver.
+ * This is one of the per-driver callbacks, see struct vxge_hw_uld_cbs{}.
+ *
+ * See also: struct vxge_hw_uld_cbs{}, enum vxge_hw_event{},
+ * vxge_hw_driver_initialize().
+ */
+
+/**
+ * struct vxge_hw_uld_cbs - driver "slow-path" callbacks.
+ * @link_up: See vxge_uld_link_up_f{}.
+ * @link_down: See vxge_uld_link_down_f{}.
+ * @crit_err: See vxge_uld_crit_err_f{}.
+ *
+ * Driver slow-path (per-driver) callbacks.
+ * Implemented by driver and provided to HW via
+ * vxge_hw_driver_initialize().
+ * Note that these callbacks are not mandatory: HW will not invoke
+ * a callback if NULL is specified.
+ *
+ * See also: vxge_hw_driver_initialize().
+ */
+struct vxge_hw_uld_cbs {
+
+	void (*link_up)(struct __vxge_hw_device *devh);
+	void (*link_down)(struct __vxge_hw_device *devh);
+	void (*crit_err)(struct __vxge_hw_device *devh,
+			enum vxge_hw_event type, u64 ext_data);
+};
+
+/*
+ * struct __vxge_hw_blockpool_entry - Block private data structure
+ * @item: List header used to link.
+ * @length: Length of the block
+ * @memblock: Virtual address block
+ * @dma_addr: DMA Address of the block.
+ * @dma_handle: DMA handle of the block.
+ * @acc_handle: DMA acc handle
+ *
+ * Block is allocated with a header to put the blocks into list.
+ *
+ */
+struct __vxge_hw_blockpool_entry {
+	struct list_head	item;
+	u32			length;
+	void			*memblock;
+	dma_addr_t		dma_addr;
+	struct pci_dev 		*dma_handle;
+	struct pci_dev 		*acc_handle;
+};
+
+/*
+ * struct __vxge_hw_blockpool - Block Pool
+ * @hldev: HW device
+ * @block_size: size of each block.
+ * @Pool_size: Number of blocks in the pool
+ * @pool_max: Maximum number of blocks above which to free additional blocks
+ * @req_out: Number of block requests with OS out standing
+ * @free_block_list: List of free blocks
+ *
+ * Block pool contains the DMA blocks preallocated.
+ *
+ */
+struct __vxge_hw_blockpool {
+	struct __vxge_hw_device *hldev;
+	u32				block_size;
+	u32				pool_size;
+	u32				pool_max;
+	u32				req_out;
+	struct list_head		free_block_list;
+	struct list_head		free_entry_list;
+};
+
+/*
+ * enum enum __vxge_hw_channel_type - Enumerated channel types.
+ * @VXGE_HW_CHANNEL_TYPE_UNKNOWN: Unknown channel.
+ * @VXGE_HW_CHANNEL_TYPE_FIFO: fifo.
+ * @VXGE_HW_CHANNEL_TYPE_RING: ring.
+ * @VXGE_HW_CHANNEL_TYPE_MAX: Maximum number of HW-supported
+ * (and recognized) channel types. Currently: 2.
+ *
+ * Enumerated channel types. Currently there are only two link-layer
+ * channels - Titan fifo and Titan ring. In the future the list will grow.
+ */
+enum __vxge_hw_channel_type {
+	VXGE_HW_CHANNEL_TYPE_UNKNOWN			= 0,
+	VXGE_HW_CHANNEL_TYPE_FIFO			= 1,
+	VXGE_HW_CHANNEL_TYPE_RING			= 2,
+	VXGE_HW_CHANNEL_TYPE_MAX			= 3
+};
+
+/*
+ * struct __vxge_hw_channel
+ * @item: List item; used to maintain a list of open channels.
+ * @type: Channel type. See enum vxge_hw_channel_type{}.
+ * @devh: Device handle. HW device object that contains _this_ channel.
+ * @vph: Virtual path handle. Virtual Path Object that contains _this_ channel.
+ * @length: Channel length. Currently allocated number of descriptors.
+ *          The channel length "grows" when more descriptors get allocated.
+ *          See _hw_mempool_grow.
+ * @reserve_arr: Reserve array. Contains descriptors that can be reserved
+ *               by driver for the subsequent send or receive operation.
+ *               See vxge_hw_fifo_txdl_reserve(),
+ *               vxge_hw_ring_rxd_reserve().
+ * @reserve_ptr: Current pointer in the resrve array
+ * @reserve_top: Reserve top gives the maximum number of dtrs available in
+ *          reserve array.
+ * @work_arr: Work array. Contains descriptors posted to the channel.
+ *            Note that at any point in time @work_arr contains 3 types of
+ *            descriptors:
+ *            1) posted but not yet consumed by Titan device;
+ *            2) consumed but not yet completed;
+ *            3) completed but not yet freed
+ *            (via vxge_hw_fifo_txdl_free() or vxge_hw_ring_rxd_free())
+ * @post_index: Post index. At any point in time points on the
+ *              position in the channel, which'll contain next to-be-posted
+ *              descriptor.
+ * @compl_index: Completion index. At any point in time points on the
+ *               position in the channel, which will contain next
+ *               to-be-completed descriptor.
+ * @free_arr: Free array. Contains completed descriptors that were freed
+ *            (i.e., handed over back to HW) by driver.
+ *            See vxge_hw_fifo_txdl_free(), vxge_hw_ring_rxd_free().
+ * @free_ptr: current pointer in free array
+ * @per_dtr_space: Per-descriptor space (in bytes) that channel user can utilize
+ *                 to store per-operation control information.
+ * @stats: Pointer to common statistics
+ * @userdata: Per-channel opaque (void*) user-defined context, which may be
+ *            driver object, ULP connection, etc.
+ *            Once channel is open, @userdata is passed back to user via
+ *            vxge_hw_channel_callback_f.
+ *
+ * HW channel object.
+ *
+ * See also: enum vxge_hw_channel_type{}, enum vxge_hw_channel_flag
+ */
+struct __vxge_hw_channel {
+	struct list_head		item;
+	enum __vxge_hw_channel_type	type;
+	struct __vxge_hw_device 	*devh;
+	struct __vxge_hw_vpath_handle 	*vph;
+	u32			length;
+	u32			vp_id;
+	void		**reserve_arr;
+	u32			reserve_ptr;
+	u32			reserve_top;
+	void		**work_arr;
+	u32			post_index ____cacheline_aligned;
+	u32			compl_index ____cacheline_aligned;
+	void		**free_arr;
+	u32			free_ptr;
+	void		**orig_arr;
+	u32			per_dtr_space;
+	void		*userdata;
+	struct vxge_hw_common_reg	__iomem *common_reg;
+	u32			first_vp_id;
+	struct vxge_hw_vpath_stats_sw_common_info *stats;
+
+} ____cacheline_aligned;
+
+/*
+ * struct __vxge_hw_virtualpath - Virtual Path
+ *
+ * @vp_id: Virtual path id
+ * @vp_open: This flag specifies if vxge_hw_vp_open is called from LL Driver
+ * @hldev: Hal device
+ * @vp_config: Virtual Path Config
+ * @vp_reg: VPATH Register map address in BAR0
+ * @vpmgmt_reg: VPATH_MGMT register map address
+ * @max_mtu: Max mtu that can be supported
+ * @vsport_number: vsport attached to this vpath
+ * @max_kdfc_db: Maximum kernel mode doorbells
+ * @max_nofl_db: Maximum non offload doorbells
+ * @tx_intr_num: Interrupt Number associated with the TX
+
+ * @ringh: Ring Queue
+ * @fifoh: FIFO Queue
+ * @vpath_handles: Virtual Path handles list
+ * @stats_block: Memory for DMAing stats
+ * @stats: Vpath statistics
+ *
+ * Virtual path structure to encapsulate the data related to a virtual path.
+ * Virtual paths are allocated by the HW upon getting configuration from the
+ * driver and inserted into the list of virtual paths.
+ */
+struct __vxge_hw_virtualpath {
+	u32				vp_id;
+
+	u32				vp_open;
+#define VXGE_HW_VP_NOT_OPEN	0
+#define	VXGE_HW_VP_OPEN		1
+
+	struct __vxge_hw_device		*hldev;
+	struct vxge_hw_vp_config	*vp_config;
+	struct vxge_hw_vpath_reg	__iomem *vp_reg;
+	struct vxge_hw_vpmgmt_reg	__iomem *vpmgmt_reg;
+	struct __vxge_hw_non_offload_db_wrapper	__iomem *nofl_db;
+
+	u32				max_mtu;
+	u32				vsport_number;
+	u32				max_kdfc_db;
+	u32				max_nofl_db;
+
+	struct __vxge_hw_ring *____cacheline_aligned ringh;
+	struct __vxge_hw_fifo *____cacheline_aligned fifoh;
+	struct list_head		vpath_handles;
+	struct __vxge_hw_blockpool_entry		*stats_block;
+	struct vxge_hw_vpath_stats_hw_info	*hw_stats;
+	struct vxge_hw_vpath_stats_hw_info	*hw_stats_sav;
+	struct vxge_hw_vpath_stats_sw_info	*sw_stats;
+};
+
+/*
+ * struct __vxge_hw_vpath_handle - List item to store callback information
+ * @item: List head to keep the item in linked list
+ * @vpath: Virtual path to which this item belongs
+ *
+ * This structure is used to store the callback information.
+ */
+struct __vxge_hw_vpath_handle{
+	struct list_head	item;
+	struct __vxge_hw_virtualpath	*vpath;
+};
+
+/*
+ * struct __vxge_hw_device
+ *
+ * HW device object.
+ */
+/**
+ * struct __vxge_hw_device  - Hal device object
+ * @magic: Magic Number
+ * @device_id: PCI Device Id of the adapter
+ * @major_revision: PCI Device major revision
+ * @minor_revision: PCI Device minor revision
+ * @bar0: BAR0 virtual address.
+ * @bar1: BAR1 virtual address.
+ * @bar2: BAR2 virtual address.
+ * @pdev: Physical device handle
+ * @config: Confguration passed by the LL driver at initialization
+ * @link_state: Link state
+ *
+ * HW device object. Represents Titan adapter
+ */
+struct __vxge_hw_device {
+	u32				magic;
+#define VXGE_HW_DEVICE_MAGIC		0x12345678
+#define VXGE_HW_DEVICE_DEAD		0xDEADDEAD
+	u16				device_id;
+	u8				major_revision;
+	u8				minor_revision;
+	void __iomem			*bar0;
+	void __iomem			*bar1;
+	void __iomem			*bar2;
+	struct pci_dev			*pdev;
+	struct net_device		*ndev;
+	struct vxge_hw_device_config	config;
+	enum vxge_hw_device_link_state	link_state;
+
+	struct vxge_hw_uld_cbs		uld_callbacks;
+
+	u32				host_type;
+	u32				func_id;
+	u32				access_rights;
+#define VXGE_HW_DEVICE_ACCESS_RIGHT_VPATH      0x1
+#define VXGE_HW_DEVICE_ACCESS_RIGHT_SRPCIM     0x2
+#define VXGE_HW_DEVICE_ACCESS_RIGHT_MRPCIM     0x4
+	struct vxge_hw_legacy_reg	__iomem *legacy_reg;
+	struct vxge_hw_toc_reg		__iomem *toc_reg;
+	struct vxge_hw_common_reg	__iomem *common_reg;
+	struct vxge_hw_mrpcim_reg	__iomem *mrpcim_reg;
+	struct vxge_hw_srpcim_reg	__iomem *srpcim_reg \
+					[VXGE_HW_TITAN_SRPCIM_REG_SPACES];
+	struct vxge_hw_vpmgmt_reg	__iomem *vpmgmt_reg \
+					[VXGE_HW_TITAN_VPMGMT_REG_SPACES];
+	struct vxge_hw_vpath_reg	__iomem *vpath_reg \
+					[VXGE_HW_TITAN_VPATH_REG_SPACES];
+	u8				__iomem *kdfc;
+	u8				__iomem *usdc;
+	struct __vxge_hw_virtualpath	virtual_paths \
+					[VXGE_HW_MAX_VIRTUAL_PATHS];
+	u64				vpath_assignments;
+	u64				vpaths_deployed;
+	u32				first_vp_id;
+	u64				tim_int_mask0[4];
+	u32				tim_int_mask1[4];
+
+	struct __vxge_hw_blockpool	block_pool;
+	struct vxge_hw_device_stats	stats;
+	u32				debug_module_mask;
+	u32				debug_level;
+	u32				level_err;
+	u32				level_trace;
+};
+
+#define VXGE_HW_INFO_LEN	64
+/**
+ * struct vxge_hw_device_hw_info - Device information
+ * @host_type: Host Type
+ * @func_id: Function Id
+ * @vpath_mask: vpath bit mask
+ * @fw_version: Firmware version
+ * @fw_date: Firmware Date
+ * @flash_version: Firmware version
+ * @flash_date: Firmware Date
+ * @mac_addrs: Mac addresses for each vpath
+ * @mac_addr_masks: Mac address masks for each vpath
+ *
+ * Returns the vpath mask that has the bits set for each vpath allocated
+ * for the driver and the first mac address for each vpath
+ */
+struct vxge_hw_device_hw_info {
+	u32		host_type;
+#define VXGE_HW_NO_MR_NO_SR_NORMAL_FUNCTION			0
+#define VXGE_HW_MR_NO_SR_VH0_BASE_FUNCTION			1
+#define VXGE_HW_NO_MR_SR_VH0_FUNCTION0				2
+#define VXGE_HW_NO_MR_SR_VH0_VIRTUAL_FUNCTION			3
+#define VXGE_HW_MR_SR_VH0_INVALID_CONFIG			4
+#define VXGE_HW_SR_VH_FUNCTION0					5
+#define VXGE_HW_SR_VH_VIRTUAL_FUNCTION				6
+#define VXGE_HW_VH_NORMAL_FUNCTION				7
+	u64		function_mode;
+#define VXGE_HW_FUNCTION_MODE_MULTI_FUNCTION			0
+#define VXGE_HW_FUNCTION_MODE_SINGLE_FUNCTION			1
+#define VXGE_HW_FUNCTION_MODE_SRIOV				2
+#define VXGE_HW_FUNCTION_MODE_MRIOV				3
+	u32		func_id;
+	u64		vpath_mask;
+	struct vxge_hw_device_version fw_version;
+	struct vxge_hw_device_date    fw_date;
+	struct vxge_hw_device_version flash_version;
+	struct vxge_hw_device_date    flash_date;
+	u8		serial_number[VXGE_HW_INFO_LEN];
+	u8		part_number[VXGE_HW_INFO_LEN];
+	u8		product_desc[VXGE_HW_INFO_LEN];
+	u8 (mac_addrs)[VXGE_HW_MAX_VIRTUAL_PATHS][ETH_ALEN];
+	u8 (mac_addr_masks)[VXGE_HW_MAX_VIRTUAL_PATHS][ETH_ALEN];
+};
+
+/**
+ * struct vxge_hw_device_attr - Device memory spaces.
+ * @bar0: BAR0 virtual address.
+ * @bar1: BAR1 virtual address.
+ * @bar2: BAR2 virtual address.
+ * @pdev: PCI device object.
+ *
+ * Device memory spaces. Includes configuration, BAR0, BAR1, etc. per device
+ * mapped memories. Also, includes a pointer to OS-specific PCI device object.
+ */
+struct vxge_hw_device_attr {
+	void __iomem		*bar0;
+	void __iomem		*bar1;
+	void __iomem		*bar2;
+	struct pci_dev 		*pdev;
+	struct vxge_hw_uld_cbs	uld_callbacks;
+};
+
+#define VXGE_HW_DEVICE_LINK_STATE_SET(hldev, ls)	(hldev->link_state = ls)
+
+#define VXGE_HW_DEVICE_TIM_INT_MASK_SET(m0, m1, i) {	\
+	if (i < 16) {				\
+		m0[0] |= vxge_vBIT(0x8, (i*4), 4);	\
+		m0[1] |= vxge_vBIT(0x4, (i*4), 4);	\
+	}			       		\
+	else {					\
+		m1[0] = 0x80000000;		\
+		m1[1] = 0x40000000;		\
+	}					\
+}
+
+#define VXGE_HW_DEVICE_TIM_INT_MASK_RESET(m0, m1, i) {	\
+	if (i < 16) {					\
+		m0[0] &= ~vxge_vBIT(0x8, (i*4), 4);		\
+		m0[1] &= ~vxge_vBIT(0x4, (i*4), 4);		\
+	}						\
+	else {						\
+		m1[0] = 0;				\
+		m1[1] = 0;				\
+	}						\
+}
+
+#define VXGE_HW_DEVICE_STATS_PIO_READ(loc, offset) {		\
+	status = vxge_hw_mrpcim_stats_access(hldev, \
+				VXGE_HW_STATS_OP_READ, \
+				loc, \
+				offset, \
+				&val64);			\
+								\
+	if (status != VXGE_HW_OK)				\
+		return status;						\
+}
+
+#define VXGE_HW_VPATH_STATS_PIO_READ(offset) {				\
+	status = __vxge_hw_vpath_stats_access(vpath, \
+			VXGE_HW_STATS_OP_READ, \
+			offset, \
+			&val64);					\
+	if (status != VXGE_HW_OK)					\
+		return status;						\
+}
+
+/*
+ * struct __vxge_hw_ring - Ring channel.
+ * @channel: Channel "base" of this ring, the common part of all HW
+ *           channels.
+ * @mempool: Memory pool, the pool from which descriptors get allocated.
+ *           (See vxge_hw_mm.h).
+ * @config: Ring configuration, part of device configuration
+ *          (see struct vxge_hw_device_config{}).
+ * @ring_length: Length of the ring
+ * @buffer_mode: 1, 3, or 5. The value specifies a receive buffer mode,
+ *          as per Titan User Guide.
+ * @rxd_size: RxD sizes for 1-, 3- or 5- buffer modes. As per Titan spec,
+ *            1-buffer mode descriptor is 32 byte long, etc.
+ * @rxd_priv_size: Per RxD size reserved (by HW) for driver to keep
+ *                 per-descriptor data (e.g., DMA handle for Solaris)
+ * @per_rxd_space: Per rxd space requested by driver
+ * @rxds_per_block: Number of descriptors per hardware-defined RxD
+ *                  block. Depends on the (1-, 3-, 5-) buffer mode.
+ * @rxdblock_priv_size: Reserved at the end of each RxD block. HW internal
+ *                      usage. Not to confuse with @rxd_priv_size.
+ * @cmpl_cnt: Completion counter. Is reset to zero upon entering the ISR.
+ * @callback: Channel completion callback. HW invokes the callback when there
+ *            are new completions on that channel. In many implementations
+ *            the @callback executes in the hw interrupt context.
+ * @rxd_init: Channel's descriptor-initialize callback.
+ *            See vxge_hw_ring_rxd_init_f{}.
+ *            If not NULL, HW invokes the callback when opening
+ *            the ring.
+ * @rxd_term: Channel's descriptor-terminate callback. If not NULL,
+ *          HW invokes the callback when closing the corresponding channel.
+ *          See also vxge_hw_channel_rxd_term_f{}.
+ * @stats: Statistics for ring
+ * Ring channel.
+ *
+ * Note: The structure is cache line aligned to better utilize
+ *       CPU cache performance.
+ */
+struct __vxge_hw_ring {
+	struct __vxge_hw_channel		channel;
+	struct vxge_hw_mempool			*mempool;
+	struct vxge_hw_vpath_reg		__iomem	*vp_reg;
+	struct vxge_hw_common_reg		__iomem	*common_reg;
+	u32					ring_length;
+	u32					buffer_mode;
+	u32					rxd_size;
+	u32					rxd_priv_size;
+	u32					per_rxd_space;
+	u32					rxds_per_block;
+	u32					rxdblock_priv_size;
+	u32					cmpl_cnt;
+	u32					vp_id;
+	u32					doorbell_cnt;
+	u32					total_db_cnt;
+	u64					rxds_limit;
+
+	enum vxge_hw_status (*callback)(
+			struct __vxge_hw_ring *ringh,
+			void *rxdh,
+			u8 t_code,
+			void *userdata);
+
+	enum vxge_hw_status (*rxd_init)(
+			void *rxdh,
+			void *userdata);
+
+	void (*rxd_term)(
+			void *rxdh,
+			enum vxge_hw_rxd_state state,
+			void *userdata);
+
+	struct vxge_hw_vpath_stats_sw_ring_info *stats	____cacheline_aligned;
+	struct vxge_hw_ring_config		*config;
+} ____cacheline_aligned;
+
+/**
+ * enum enum vxge_hw_txdl_state - Descriptor (TXDL) state.
+ * @VXGE_HW_TXDL_STATE_NONE: Invalid state.
+ * @VXGE_HW_TXDL_STATE_AVAIL: Descriptor is available for reservation.
+ * @VXGE_HW_TXDL_STATE_POSTED: Descriptor is posted for processing by the
+ * device.
+ * @VXGE_HW_TXDL_STATE_FREED: Descriptor is free and can be reused for
+ * filling-in and posting later.
+ *
+ * Titan/HW descriptor states.
+ *
+ */
+enum vxge_hw_txdl_state {
+	VXGE_HW_TXDL_STATE_NONE	= 0,
+	VXGE_HW_TXDL_STATE_AVAIL	= 1,
+	VXGE_HW_TXDL_STATE_POSTED	= 2,
+	VXGE_HW_TXDL_STATE_FREED	= 3
+};
+/*
+ * struct __vxge_hw_fifo - Fifo.
+ * @channel: Channel "base" of this fifo, the common part of all HW
+ *             channels.
+ * @mempool: Memory pool, from which descriptors get allocated.
+ * @config: Fifo configuration, part of device configuration
+ *             (see struct vxge_hw_device_config{}).
+ * @interrupt_type: Interrupt type to be used
+ * @no_snoop_bits: See struct vxge_hw_fifo_config{}.
+ * @txdl_per_memblock: Number of TxDLs (TxD lists) per memblock.
+ *             on TxDL please refer to Titan UG.
+ * @txdl_size: Configured TxDL size (i.e., number of TxDs in a list), plus
+ *             per-TxDL HW private space (struct __vxge_hw_fifo_txdl_priv).
+ * @priv_size: Per-Tx descriptor space reserved for driver
+ *             usage.
+ * @per_txdl_space: Per txdl private space for the driver
+ * @callback: Fifo completion callback. HW invokes the callback when there
+ *             are new completions on that fifo. In many implementations
+ *             the @callback executes in the hw interrupt context.
+ * @txdl_term: Fifo's descriptor-terminate callback. If not NULL,
+ *             HW invokes the callback when closing the corresponding fifo.
+ *             See also vxge_hw_fifo_txdl_term_f{}.
+ * @stats: Statistics of this fifo
+ *
+ * Fifo channel.
+ * Note: The structure is cache line aligned.
+ */
+struct __vxge_hw_fifo {
+	struct __vxge_hw_channel		channel;
+	struct vxge_hw_mempool			*mempool;
+	struct vxge_hw_fifo_config		*config;
+	struct vxge_hw_vpath_reg		__iomem *vp_reg;
+	struct __vxge_hw_non_offload_db_wrapper	__iomem *nofl_db;
+	u64					interrupt_type;
+	u32					no_snoop_bits;
+	u32					txdl_per_memblock;
+	u32					txdl_size;
+	u32					priv_size;
+	u32					per_txdl_space;
+	u32					vp_id;
+	u32					tx_intr_num;
+
+	enum vxge_hw_status (*callback)(
+			struct __vxge_hw_fifo *fifo_handle,
+			void *txdlh,
+			enum vxge_hw_fifo_tcode t_code,
+			void *userdata,
+			void **skb_ptr);
+
+	void (*txdl_term)(
+			void *txdlh,
+			enum vxge_hw_txdl_state state,
+			void *userdata);
+
+	struct vxge_hw_vpath_stats_sw_fifo_info *stats ____cacheline_aligned;
+} ____cacheline_aligned;
+
+/*
+ * struct __vxge_hw_fifo_txdl_priv - Transmit descriptor HW-private data.
+ * @dma_addr: DMA (mapped) address of _this_ descriptor.
+ * @dma_handle: DMA handle used to map the descriptor onto device.
+ * @dma_offset: Descriptor's offset in the memory block. HW allocates
+ *	 descriptors in memory blocks (see struct vxge_hw_fifo_config{})
+ *             Each memblock is a contiguous block of DMA-able memory.
+ * @frags: Total number of fragments (that is, contiguous data buffers)
+ * carried by this TxDL.
+ * @align_vaddr_start: Aligned virtual address start
+ * @align_vaddr: Virtual address of the per-TxDL area in memory used for
+ *             alignement. Used to place one or more mis-aligned fragments
+ * @align_dma_addr: DMA address translated from the @align_vaddr.
+ * @align_dma_handle: DMA handle that corresponds to @align_dma_addr.
+ * @align_dma_acch: DMA access handle corresponds to @align_dma_addr.
+ * @align_dma_offset: The current offset into the @align_vaddr area.
+ * Grows while filling the descriptor, gets reset.
+ * @align_used_frags: Number of fragments used.
+ * @alloc_frags: Total number of fragments allocated.
+ * @unused: TODO
+ * @next_txdl_priv: (TODO).
+ * @first_txdp: (TODO).
+ * @linked_txdl_priv: Pointer to any linked TxDL for creating contiguous
+ *             TxDL list.
+ * @txdlh: Corresponding txdlh to this TxDL.
+ * @memblock: Pointer to the TxDL memory block or memory page.
+ *             on the next send operation.
+ * @dma_object: DMA address and handle of the memory block that contains
+ *             the descriptor. This member is used only in the "checked"
+ *             version of the HW (to enforce certain assertions);
+ *             otherwise it gets compiled out.
+ * @allocated: True if the descriptor is reserved, 0 otherwise. Internal usage.
+ *
+ * Per-transmit decsriptor HW-private data. HW uses the space to keep DMA
+ * information associated with the descriptor. Note that driver can ask HW
+ * to allocate additional per-descriptor space for its own (driver-specific)
+ * purposes.
+ *
+ * See also: struct vxge_hw_ring_rxd_priv{}.
+ */
+struct __vxge_hw_fifo_txdl_priv {
+	dma_addr_t		dma_addr;
+	struct pci_dev	*dma_handle;
+	ptrdiff_t		dma_offset;
+	u32				frags;
+	u8				*align_vaddr_start;
+	u8				*align_vaddr;
+	dma_addr_t		align_dma_addr;
+	struct pci_dev 	*align_dma_handle;
+	struct pci_dev	*align_dma_acch;
+	ptrdiff_t		align_dma_offset;
+	u32				align_used_frags;
+	u32				alloc_frags;
+	u32				unused;
+	struct __vxge_hw_fifo_txdl_priv	*next_txdl_priv;
+	struct vxge_hw_fifo_txd		*first_txdp;
+	void			*memblock;
+};
+
+/*
+ * struct __vxge_hw_non_offload_db_wrapper - Non-offload Doorbell Wrapper
+ * @control_0: Bits 0 to 7 - Doorbell type.
+ *             Bits 8 to 31 - Reserved.
+ *             Bits 32 to 39 - The highest TxD in this TxDL.
+ *             Bits 40 to 47 - Reserved.
+	*	       Bits 48 to 55 - Reserved.
+ *             Bits 56 to 63 - No snoop flags.
+ * @txdl_ptr:  The starting location of the TxDL in host memory.
+ *
+ * Created by the host and written to the adapter via PIO to a Kernel Doorbell
+ * FIFO. All non-offload doorbell wrapper fields must be written by the host as
+ * part of a doorbell write. Consumed by the adapter but is not written by the
+ * adapter.
+ */
+struct __vxge_hw_non_offload_db_wrapper {
+	u64		control_0;
+#define	VXGE_HW_NODBW_GET_TYPE(ctrl0)			vxge_bVALn(ctrl0, 0, 8)
+#define VXGE_HW_NODBW_TYPE(val) vxge_vBIT(val, 0, 8)
+#define	VXGE_HW_NODBW_TYPE_NODBW				0
+
+#define	VXGE_HW_NODBW_GET_LAST_TXD_NUMBER(ctrl0)	vxge_bVALn(ctrl0, 32, 8)
+#define VXGE_HW_NODBW_LAST_TXD_NUMBER(val) vxge_vBIT(val, 32, 8)
+
+#define	VXGE_HW_NODBW_GET_NO_SNOOP(ctrl0)		vxge_bVALn(ctrl0, 56, 8)
+#define VXGE_HW_NODBW_LIST_NO_SNOOP(val) vxge_vBIT(val, 56, 8)
+#define	VXGE_HW_NODBW_LIST_NO_SNOOP_TXD_READ_TXD0_WRITE		0x2
+#define	VXGE_HW_NODBW_LIST_NO_SNOOP_TX_FRAME_DATA_READ		0x1
+
+	u64		txdl_ptr;
+};
+
+/*
+ * TX Descriptor
+ */
+
+/**
+ * struct vxge_hw_fifo_txd - Transmit Descriptor
+ * @control_0: Bits 0 to 6 - Reserved.
+ *             Bit 7 - List Ownership. This field should be initialized
+ *             to '1' by the driver before the transmit list pointer is
+ *             written to the adapter. This field will be set to '0' by the
+ *             adapter once it has completed transmitting the frame or frames in
+ *             the list. Note - This field is only valid in TxD0. Additionally,
+ *             for multi-list sequences, the driver should not release any
+ *             buffers until the ownership of the last list in the multi-list
+ *             sequence has been returned to the host.
+ *             Bits 8 to 11 - Reserved
+ *             Bits 12 to 15 - Transfer_Code. This field is only valid in
+ *             TxD0. It is used to describe the status of the transmit data
+ *             buffer transfer. This field is always overwritten by the
+ *             adapter, so this field may be initialized to any value.
+ *             Bits 16 to 17 - Host steering. This field allows the host to
+ *             override the selection of the physical transmit port.
+ *             Attention:
+ *             Normal sounds as if learned from the switch rather than from
+ *             the aggregation algorythms.
+ *             00: Normal. Use Destination/MAC Address
+ *             lookup to determine the transmit port.
+ *             01: Send on physical Port1.
+ *             10: Send on physical Port0.
+	*	       11: Send on both ports.
+ *             Bits 18 to 21 - Reserved
+ *             Bits 22 to 23 - Gather_Code. This field is set by the host and
+ *             is used to describe how individual buffers comprise a frame.
+ *             10: First descriptor of a frame.
+ *             00: Middle of a multi-descriptor frame.
+ *             01: Last descriptor of a frame.
+ *             11: First and last descriptor of a frame (the entire frame
+ *             resides in a single buffer).
+ *             For multi-descriptor frames, the only valid gather code sequence
+ *             is {10, [00], 01}. In other words, the descriptors must be placed
+ *             in the list in the correct order.
+ *             Bits 24 to 27 - Reserved
+ *             Bits 28 to 29 - LSO_Frm_Encap. LSO Frame Encapsulation
+ *             definition. Only valid in TxD0. This field allows the host to
+ *             indicate the Ethernet encapsulation of an outbound LSO packet.
+ *             00 - classic mode (best guess)
+ *             01 - LLC
+ *             10 - SNAP
+ *             11 - DIX
+ *             If "classic mode" is selected, the adapter will attempt to
+ *             decode the frame's Ethernet encapsulation by examining the L/T
+ *             field as follows:
+ *             <= 0x05DC LLC/SNAP encoding; must examine DSAP/SSAP to determine
+ *             if packet is IPv4 or IPv6.
+ *             0x8870 Jumbo-SNAP encoding.
+ *             0x0800 IPv4 DIX encoding
+ *             0x86DD IPv6 DIX encoding
+ *             others illegal encapsulation
+ *             Bits 30 - LSO_ Flag. Large Send Offload (LSO) flag.
+ *             Set to 1 to perform segmentation offload for TCP/UDP.
+ *             This field is valid only in TxD0.
+ *             Bits 31 to 33 - Reserved.
+ *             Bits 34 to 47 - LSO_MSS. TCP/UDP LSO Maximum Segment Size
+ *             This field is meaningful only when LSO_Control is non-zero.
+ *             When LSO_Control is set to TCP_LSO, the single (possibly large)
+ *             TCP segment described by this TxDL will be sent as a series of
+ *             TCP segments each of which contains no more than LSO_MSS
+ *             payload bytes.
+ *             When LSO_Control is set to UDP_LSO, the single (possibly large)
+ *             UDP datagram described by this TxDL will be sent as a series of
+ *             UDP datagrams each of which contains no more than LSO_MSS
+ *             payload bytes.
+ *             All outgoing frames from this TxDL will have LSO_MSS bytes of UDP
+ *             or TCP payload, with the exception of the last, which will have
+ *             <= LSO_MSS bytes of payload.
+ *             Bits 48 to 63 - Buffer_Size. Number of valid bytes in the
+ *             buffer to be read by the adapter. This field is written by the
+ *             host. A value of 0 is illegal.
+ *	       Bits 32 to 63 - This value is written by the adapter upon
+ *	       completion of a UDP or TCP LSO operation and indicates the number
+ *             of UDP or TCP payload bytes that were transmitted. 0x0000 will be
+ *             returned for any non-LSO operation.
+ * @control_1: Bits 0 to 4 - Reserved.
+ *             Bit 5 - Tx_CKO_IPv4 Set to a '1' to enable IPv4 header checksum
+ *             offload. This field is only valid in the first TxD of a frame.
+ *             Bit 6 - Tx_CKO_TCP Set to a '1' to enable TCP checksum offload.
+ *             This field is only valid in the first TxD of a frame (the TxD's
+ *             gather code must be 10 or 11). The driver should only set this
+ *             bit if it can guarantee that TCP is present.
+ *             Bit 7 - Tx_CKO_UDP Set to a '1' to enable UDP checksum offload.
+ *             This field is only valid in the first TxD of a frame (the TxD's
+ *             gather code must be 10 or 11). The driver should only set this
+ *             bit if it can guarantee that UDP is present.
+ *             Bits 8 to 14 - Reserved.
+ *             Bit 15 - Tx_VLAN_Enable VLAN tag insertion flag. Set to a '1' to
+ *             instruct the adapter to insert the VLAN tag specified by the
+ *             Tx_VLAN_Tag field. This field is only valid in the first TxD of
+ *             a frame.
+ *             Bits 16 to 31 - Tx_VLAN_Tag. Variable portion of the VLAN tag
+ *             to be inserted into the frame by the adapter (the first two bytes
+ *             of a VLAN tag are always 0x8100). This field is only valid if the
+ *             Tx_VLAN_Enable field is set to '1'.
+ *             Bits 32 to 33 - Reserved.
+ *             Bits 34 to 39 - Tx_Int_Number. Indicates which Tx interrupt
+ *             number the frame associated with. This field is written by the
+ *             host. It is only valid in the first TxD of a frame.
+ *             Bits 40 to 42 - Reserved.
+ *             Bit 43 - Set to 1 to exclude the frame from bandwidth metering
+ *             functions. This field is valid only in the first TxD
+ *             of a frame.
+ *             Bits 44 to 45 - Reserved.
+ *             Bit 46 - Tx_Int_Per_List Set to a '1' to instruct the adapter to
+ *             generate an interrupt as soon as all of the frames in the list
+ *             have been transmitted. In order to have per-frame interrupts,
+ *             the driver should place a maximum of one frame per list. This
+ *             field is only valid in the first TxD of a frame.
+ *             Bit 47 - Tx_Int_Utilization Set to a '1' to instruct the adapter
+ *             to count the frame toward the utilization interrupt specified in
+ *             the Tx_Int_Number field. This field is only valid in the first
+ *             TxD of a frame.
+ *             Bits 48 to 63 - Reserved.
+ * @buffer_pointer: Buffer start address.
+ * @host_control: Host_Control.Opaque 64bit data stored by driver inside the
+ *            Titan descriptor prior to posting the latter on the fifo
+ *            via vxge_hw_fifo_txdl_post().The %host_control is returned as is
+ *            to the driver with each completed descriptor.
+ *
+ * Transmit descriptor (TxD).Fifo descriptor contains configured number
+ * (list) of TxDs. * For more details please refer to Titan User Guide,
+ * Section 5.4.2 "Transmit Descriptor (TxD) Format".
+ */
+struct vxge_hw_fifo_txd {
+	u64 control_0;
+#define VXGE_HW_FIFO_TXD_LIST_OWN_ADAPTER		vxge_mBIT(7)
+
+#define VXGE_HW_FIFO_TXD_T_CODE_GET(ctrl0)		vxge_bVALn(ctrl0, 12, 4)
+#define VXGE_HW_FIFO_TXD_T_CODE(val) 			vxge_vBIT(val, 12, 4)
+#define VXGE_HW_FIFO_TXD_T_CODE_UNUSED		VXGE_HW_FIFO_T_CODE_UNUSED
+
+
+#define VXGE_HW_FIFO_TXD_GATHER_CODE(val) 		vxge_vBIT(val, 22, 2)
+#define VXGE_HW_FIFO_TXD_GATHER_CODE_FIRST	VXGE_HW_FIFO_GATHER_CODE_FIRST
+#define VXGE_HW_FIFO_TXD_GATHER_CODE_LAST	VXGE_HW_FIFO_GATHER_CODE_LAST
+
+
+#define VXGE_HW_FIFO_TXD_LSO_EN				vxge_mBIT(30)
+
+#define VXGE_HW_FIFO_TXD_LSO_MSS(val) 			vxge_vBIT(val, 34, 14)
+
+#define VXGE_HW_FIFO_TXD_BUFFER_SIZE(val) 		vxge_vBIT(val, 48, 16)
+
+	u64 control_1;
+#define VXGE_HW_FIFO_TXD_TX_CKO_IPV4_EN			vxge_mBIT(5)
+#define VXGE_HW_FIFO_TXD_TX_CKO_TCP_EN			vxge_mBIT(6)
+#define VXGE_HW_FIFO_TXD_TX_CKO_UDP_EN			vxge_mBIT(7)
+#define VXGE_HW_FIFO_TXD_VLAN_ENABLE			vxge_mBIT(15)
+
+#define VXGE_HW_FIFO_TXD_VLAN_TAG(val) 			vxge_vBIT(val, 16, 16)
+
+#define VXGE_HW_FIFO_TXD_INT_NUMBER(val) 		vxge_vBIT(val, 34, 6)
+
+#define VXGE_HW_FIFO_TXD_INT_TYPE_PER_LIST		vxge_mBIT(46)
+#define VXGE_HW_FIFO_TXD_INT_TYPE_UTILZ			vxge_mBIT(47)
+
+	u64 buffer_pointer;
+
+	u64 host_control;
+};
+
+/**
+ * struct vxge_hw_ring_rxd_1 - One buffer mode RxD for ring
+ * @host_control: This field is exclusively for host use and is "readonly"
+ *             from the adapter's perspective.
+ * @control_0:Bits 0 to 6 - RTH_Bucket get
+ *	      Bit 7 - Own Descriptor ownership bit. This bit is set to 1
+ *            by the host, and is set to 0 by the adapter.
+ *	      0 - Host owns RxD and buffer.
+ *	      1 - The adapter owns RxD and buffer.
+ *	      Bit 8 - Fast_Path_Eligible When set, indicates that the
+ *            received frame meets all of the criteria for fast path processing.
+ *            The required criteria are as follows:
+ *            !SYN &
+ *            (Transfer_Code == "Transfer OK") &
+ *            (!Is_IP_Fragment) &
+ *            ((Is_IPv4 & computed_L3_checksum == 0xFFFF) |
+ *            (Is_IPv6)) &
+ *            ((Is_TCP & computed_L4_checksum == 0xFFFF) |
+ *            (Is_UDP & (computed_L4_checksum == 0xFFFF |
+ *            computed _L4_checksum == 0x0000)))
+ *            (same meaning for all RxD buffer modes)
+ *	      Bit 9 - L3 Checksum Correct
+ *	      Bit 10 - L4 Checksum Correct
+ *	      Bit 11 - Reserved
+ *	      Bit 12 to 15 - This field is written by the adapter. It is
+ *            used to report the status of the frame transfer to the host.
+ *	      0x0 - Transfer OK
+ *	      0x4 - RDA Failure During Transfer
+ *	      0x5 - Unparseable Packet, such as unknown IPv6 header.
+ *	      0x6 - Frame integrity error (FCS or ECC).
+ *	      0x7 - Buffer Size Error. The provided buffer(s) were not
+ *                  appropriately sized and data loss occurred.
+ *	      0x8 - Internal ECC Error. RxD corrupted.
+ *	      0x9 - IPv4 Checksum error
+ *	      0xA - TCP/UDP Checksum error
+ *	      0xF - Unknown Error or Multiple Error. Indicates an
+ *               unknown problem or that more than one of transfer codes is set.
+ *	      Bit 16 - SYN The adapter sets this field to indicate that
+ *                the incoming frame contained a TCP segment with its SYN bit
+ *	          set and its ACK bit NOT set. (same meaning for all RxD buffer
+ *                modes)
+ *	      Bit 17 - Is ICMP
+ *	      Bit 18 - RTH_SPDM_HIT Set to 1 if there was a match in the
+ *                Socket Pair Direct Match Table and the frame was steered based
+ *                on SPDM.
+ *	      Bit 19 - RTH_IT_HIT Set to 1 if there was a match in the
+ *            Indirection Table and the frame was steered based on hash
+ *            indirection.
+ *	      Bit 20 to 23 - RTH_HASH_TYPE Indicates the function (hash
+ *	          type) that was used to calculate the hash.
+ *	      Bit 19 - IS_VLAN Set to '1' if the frame was/is VLAN
+ *	          tagged.
+ *	      Bit 25 to 26 - ETHER_ENCAP Reflects the Ethernet encapsulation
+ *                of the received frame.
+ *	      0x0 - Ethernet DIX
+ *	      0x1 - LLC
+ *	      0x2 - SNAP (includes Jumbo-SNAP)
+ *	      0x3 - IPX
+ *	      Bit 27 - IS_IPV4 Set to '1' if the frame contains an IPv4	packet.
+ *	      Bit 28 - IS_IPV6 Set to '1' if the frame contains an IPv6 packet.
+ *	      Bit 29 - IS_IP_FRAG Set to '1' if the frame contains a fragmented
+ *            IP packet.
+ *	      Bit 30 - IS_TCP Set to '1' if the frame contains a TCP segment.
+ *	      Bit 31 - IS_UDP Set to '1' if the frame contains a UDP message.
+ *	      Bit 32 to 47 - L3_Checksum[0:15] The IPv4 checksum value 	that
+ *            arrived with the frame. If the resulting computed IPv4 header
+ *            checksum for the frame did not produce the expected 0xFFFF value,
+ *            then the transfer code would be set to 0x9.
+ *	      Bit 48 to 63 - L4_Checksum[0:15] The TCP/UDP checksum value that
+ *            arrived with the frame. If the resulting computed TCP/UDP checksum
+ *            for the frame did not produce the expected 0xFFFF value, then the
+ *            transfer code would be set to 0xA.
+ * @control_1:Bits 0 to 1 - Reserved
+ *            Bits 2 to 15 - Buffer0_Size.This field is set by the host and
+ *            eventually overwritten by the adapter. The host writes the
+ *            available buffer size in bytes when it passes the descriptor to
+ *            the adapter. When a frame is delivered the host, the adapter
+ *            populates this field with the number of bytes written into the
+ *            buffer. The largest supported buffer is 16, 383 bytes.
+ *	      Bit 16 to 47 - RTH Hash Value 32-bit RTH hash value. Only valid if
+ *	      RTH_HASH_TYPE (Control_0, bits 20:23) is nonzero.
+ *	      Bit 48 to 63 - VLAN_Tag[0:15] The contents of the variable portion
+ *            of the VLAN tag, if one was detected by the adapter. This field is
+ *            populated even if VLAN-tag stripping is enabled.
+ * @buffer0_ptr: Pointer to buffer. This field is populated by the driver.
+ *
+ * One buffer mode RxD for ring structure
+ */
+struct vxge_hw_ring_rxd_1 {
+	u64 host_control;
+	u64 control_0;
+#define VXGE_HW_RING_RXD_RTH_BUCKET_GET(ctrl0)		vxge_bVALn(ctrl0, 0, 7)
+
+#define VXGE_HW_RING_RXD_LIST_OWN_ADAPTER		vxge_mBIT(7)
+
+#define VXGE_HW_RING_RXD_FAST_PATH_ELIGIBLE_GET(ctrl0)	vxge_bVALn(ctrl0, 8, 1)
+
+#define VXGE_HW_RING_RXD_L3_CKSUM_CORRECT_GET(ctrl0)	vxge_bVALn(ctrl0, 9, 1)
+
+#define VXGE_HW_RING_RXD_L4_CKSUM_CORRECT_GET(ctrl0)	vxge_bVALn(ctrl0, 10, 1)
+
+#define VXGE_HW_RING_RXD_T_CODE_GET(ctrl0)		vxge_bVALn(ctrl0, 12, 4)
+#define VXGE_HW_RING_RXD_T_CODE(val) 			vxge_vBIT(val, 12, 4)
+
+#define VXGE_HW_RING_RXD_T_CODE_UNUSED		VXGE_HW_RING_T_CODE_UNUSED
+
+#define VXGE_HW_RING_RXD_SYN_GET(ctrl0)		vxge_bVALn(ctrl0, 16, 1)
+
+#define VXGE_HW_RING_RXD_IS_ICMP_GET(ctrl0)		vxge_bVALn(ctrl0, 17, 1)
+
+#define VXGE_HW_RING_RXD_RTH_SPDM_HIT_GET(ctrl0)	vxge_bVALn(ctrl0, 18, 1)
+
+#define VXGE_HW_RING_RXD_RTH_IT_HIT_GET(ctrl0)		vxge_bVALn(ctrl0, 19, 1)
+
+#define VXGE_HW_RING_RXD_RTH_HASH_TYPE_GET(ctrl0)	vxge_bVALn(ctrl0, 20, 4)
+
+#define VXGE_HW_RING_RXD_IS_VLAN_GET(ctrl0)		vxge_bVALn(ctrl0, 24, 1)
+
+#define VXGE_HW_RING_RXD_ETHER_ENCAP_GET(ctrl0)		vxge_bVALn(ctrl0, 25, 2)
+
+#define VXGE_HW_RING_RXD_FRAME_PROTO_GET(ctrl0)		vxge_bVALn(ctrl0, 27, 5)
+
+#define VXGE_HW_RING_RXD_L3_CKSUM_GET(ctrl0)	vxge_bVALn(ctrl0, 32, 16)
+
+#define VXGE_HW_RING_RXD_L4_CKSUM_GET(ctrl0)	vxge_bVALn(ctrl0, 48, 16)
+
+	u64 control_1;
+
+#define VXGE_HW_RING_RXD_1_BUFFER0_SIZE_GET(ctrl1)	vxge_bVALn(ctrl1, 2, 14)
+#define VXGE_HW_RING_RXD_1_BUFFER0_SIZE(val) vxge_vBIT(val, 2, 14)
+#define VXGE_HW_RING_RXD_1_BUFFER0_SIZE_MASK		vxge_vBIT(0x3FFF, 2, 14)
+
+#define VXGE_HW_RING_RXD_1_RTH_HASH_VAL_GET(ctrl1)    vxge_bVALn(ctrl1, 16, 32)
+
+#define VXGE_HW_RING_RXD_VLAN_TAG_GET(ctrl1)	vxge_bVALn(ctrl1, 48, 16)
+
+	u64 buffer0_ptr;
+};
+
+enum vxge_hw_rth_algoritms {
+	RTH_ALG_JENKINS = 0,
+	RTH_ALG_MS_RSS	= 1,
+	RTH_ALG_CRC32C	= 2
+};
+
+/**
+ * struct vxge_hw_rth_hash_types - RTH hash types.
+ * @hash_type_tcpipv4_en: Enables RTH field type HashTypeTcpIPv4
+ * @hash_type_ipv4_en: Enables RTH field type HashTypeIPv4
+ * @hash_type_tcpipv6_en: Enables RTH field type HashTypeTcpIPv6
+ * @hash_type_ipv6_en: Enables RTH field type HashTypeIPv6
+ * @hash_type_tcpipv6ex_en: Enables RTH field type HashTypeTcpIPv6Ex
+ * @hash_type_ipv6ex_en: Enables RTH field type HashTypeIPv6Ex
+ *
+ * Used to pass RTH hash types to rts_rts_set.
+ *
+ * See also: vxge_hw_vpath_rts_rth_set(), vxge_hw_vpath_rts_rth_get().
+ */
+struct vxge_hw_rth_hash_types {
+	u8 hash_type_tcpipv4_en;
+	u8 hash_type_ipv4_en;
+	u8 hash_type_tcpipv6_en;
+	u8 hash_type_ipv6_en;
+	u8 hash_type_tcpipv6ex_en;
+	u8 hash_type_ipv6ex_en;
+};
+
+u32
+vxge_hw_device_debug_mask_get(struct __vxge_hw_device *devh);
+
+void vxge_hw_device_debug_set(
+	struct __vxge_hw_device *devh,
+	enum vxge_debug_level level,
+	u32 mask);
+
+u32
+vxge_hw_device_error_level_get(struct __vxge_hw_device *devh);
+
+u32
+vxge_hw_device_trace_level_get(struct __vxge_hw_device *devh);
+
+u32
+vxge_hw_device_debug_mask_get(struct __vxge_hw_device *devh);
+
+/**
+ * vxge_hw_ring_rxd_size_get	- Get the size of ring descriptor.
+ * @buf_mode: Buffer mode (1, 3 or 5)
+ *
+ * This function returns the size of RxD for given buffer mode
+ */
+static inline u32 vxge_hw_ring_rxd_size_get(u32 buf_mode)
+{
+	return sizeof(struct vxge_hw_ring_rxd_1);
+}
+
+/**
+ * vxge_hw_ring_rxds_per_block_get - Get the number of rxds per block.
+ * @buf_mode: Buffer mode (1 buffer mode only)
+ *
+ * This function returns the number of RxD for RxD block for given buffer mode
+ */
+static inline u32 vxge_hw_ring_rxds_per_block_get(u32 buf_mode)
+{
+	return (u32)((VXGE_HW_BLOCK_SIZE-16) /
+		sizeof(struct vxge_hw_ring_rxd_1));
+}
+
+/**
+ * vxge_hw_ring_rxd_1b_set - Prepare 1-buffer-mode descriptor.
+ * @rxdh: Descriptor handle.
+ * @dma_pointer: DMA address of	a single receive buffer	this descriptor
+ * should carry. Note that by the time vxge_hw_ring_rxd_1b_set is called,
+ * the receive buffer should be already mapped to the device
+ * @size: Size of the receive @dma_pointer buffer.
+ *
+ * Prepare 1-buffer-mode Rx	descriptor for posting
+ * (via	vxge_hw_ring_rxd_post()).
+ *
+ * This	inline helper-function does not	return any parameters and always
+ * succeeds.
+ *
+ */
+static inline
+void vxge_hw_ring_rxd_1b_set(
+	void *rxdh,
+	dma_addr_t dma_pointer,
+	u32 size)
+{
+	struct vxge_hw_ring_rxd_1 *rxdp = (struct vxge_hw_ring_rxd_1 *)rxdh;
+	rxdp->buffer0_ptr = dma_pointer;
+	rxdp->control_1	&= ~VXGE_HW_RING_RXD_1_BUFFER0_SIZE_MASK;
+	rxdp->control_1	|= VXGE_HW_RING_RXD_1_BUFFER0_SIZE(size);
+}
+
+/**
+ * vxge_hw_ring_rxd_1b_get - Get data from the completed 1-buf
+ * descriptor.
+ * @vpath_handle: Virtual Path handle.
+ * @rxdh: Descriptor handle.
+ * @dma_pointer: DMA address of	a single receive buffer	this descriptor
+ * carries. Returned by HW.
+ * @pkt_length:	Length (in bytes) of the data in the buffer pointed by
+ *
+ * Retrieve protocol data from the completed 1-buffer-mode Rx descriptor.
+ * This	inline helper-function uses completed descriptor to populate receive
+ * buffer pointer and other "out" parameters. The function always succeeds.
+ *
+ */
+static inline
+void vxge_hw_ring_rxd_1b_get(
+	struct __vxge_hw_ring *ring_handle,
+	void *rxdh,
+	u32 *pkt_length)
+{
+	struct vxge_hw_ring_rxd_1 *rxdp = (struct vxge_hw_ring_rxd_1 *)rxdh;
+
+	*pkt_length =
+		(u32)VXGE_HW_RING_RXD_1_BUFFER0_SIZE_GET(rxdp->control_1);
+}
+
+/**
+ * vxge_hw_ring_rxd_1b_info_get - Get extended information associated with
+ * a completed receive descriptor for 1b mode.
+ * @vpath_handle: Virtual Path handle.
+ * @rxdh: Descriptor handle.
+ * @rxd_info: Descriptor information
+ *
+ * Retrieve extended information associated with a completed receive descriptor.
+ *
+ */
+static inline
+void vxge_hw_ring_rxd_1b_info_get(
+	struct __vxge_hw_ring *ring_handle,
+	void *rxdh,
+	struct vxge_hw_ring_rxd_info *rxd_info)
+{
+
+	struct vxge_hw_ring_rxd_1 *rxdp = (struct vxge_hw_ring_rxd_1 *)rxdh;
+	rxd_info->syn_flag =
+		(u32)VXGE_HW_RING_RXD_SYN_GET(rxdp->control_0);
+	rxd_info->is_icmp =
+		(u32)VXGE_HW_RING_RXD_IS_ICMP_GET(rxdp->control_0);
+	rxd_info->fast_path_eligible =
+		(u32)VXGE_HW_RING_RXD_FAST_PATH_ELIGIBLE_GET(rxdp->control_0);
+	rxd_info->l3_cksum_valid =
+		(u32)VXGE_HW_RING_RXD_L3_CKSUM_CORRECT_GET(rxdp->control_0);
+	rxd_info->l3_cksum =
+		(u32)VXGE_HW_RING_RXD_L3_CKSUM_GET(rxdp->control_0);
+	rxd_info->l4_cksum_valid =
+		(u32)VXGE_HW_RING_RXD_L4_CKSUM_CORRECT_GET(rxdp->control_0);
+	rxd_info->l4_cksum =
+		(u32)VXGE_HW_RING_RXD_L4_CKSUM_GET(rxdp->control_0);;
+	rxd_info->frame =
+		(u32)VXGE_HW_RING_RXD_ETHER_ENCAP_GET(rxdp->control_0);
+	rxd_info->proto =
+		(u32)VXGE_HW_RING_RXD_FRAME_PROTO_GET(rxdp->control_0);
+	rxd_info->is_vlan =
+		(u32)VXGE_HW_RING_RXD_IS_VLAN_GET(rxdp->control_0);
+	rxd_info->vlan =
+		(u32)VXGE_HW_RING_RXD_VLAN_TAG_GET(rxdp->control_1);
+	rxd_info->rth_bucket =
+		(u32)VXGE_HW_RING_RXD_RTH_BUCKET_GET(rxdp->control_0);
+	rxd_info->rth_it_hit =
+		(u32)VXGE_HW_RING_RXD_RTH_IT_HIT_GET(rxdp->control_0);
+	rxd_info->rth_spdm_hit =
+		(u32)VXGE_HW_RING_RXD_RTH_SPDM_HIT_GET(rxdp->control_0);
+	rxd_info->rth_hash_type =
+		(u32)VXGE_HW_RING_RXD_RTH_HASH_TYPE_GET(rxdp->control_0);
+	rxd_info->rth_value =
+		(u32)VXGE_HW_RING_RXD_1_RTH_HASH_VAL_GET(rxdp->control_1);
+}
+
+/**
+ * vxge_hw_ring_rxd_private_get - Get driver private per-descriptor data
+ *                      of 1b mode 3b mode ring.
+ * @rxdh: Descriptor handle.
+ *
+ * Returns: private driver	info associated	with the descriptor.
+ * driver requests	per-descriptor space via vxge_hw_ring_attr.
+ *
+ */
+static inline void *vxge_hw_ring_rxd_private_get(void *rxdh)
+{
+	struct vxge_hw_ring_rxd_1 *rxdp = (struct vxge_hw_ring_rxd_1 *)rxdh;
+	return (void *)(size_t)rxdp->host_control;
+}
+
+/**
+ * vxge_hw_fifo_txdl_cksum_set_bits - Offload checksum.
+ * @txdlh: Descriptor handle.
+ * @cksum_bits: Specifies which checksums are to be offloaded: IPv4,
+ *              and/or TCP and/or UDP.
+ *
+ * Ask Titan to calculate IPv4 & transport checksums for _this_ transmit
+ * descriptor.
+ * This API is part of the preparation of the transmit descriptor for posting
+ * (via vxge_hw_fifo_txdl_post()). The related "preparation" APIs include
+ * vxge_hw_fifo_txdl_mss_set(), vxge_hw_fifo_txdl_buffer_set_aligned(),
+ * and vxge_hw_fifo_txdl_buffer_set().
+ * All these APIs fill in the fields of the fifo descriptor,
+ * in accordance with the Titan specification.
+ *
+ */
+static inline void vxge_hw_fifo_txdl_cksum_set_bits(void *txdlh, u64 cksum_bits)
+{
+	struct vxge_hw_fifo_txd *txdp = (struct vxge_hw_fifo_txd *)txdlh;
+	txdp->control_1 |= cksum_bits;
+}
+
+/**
+ * vxge_hw_fifo_txdl_mss_set - Set MSS.
+ * @txdlh: Descriptor handle.
+ * @mss: MSS size for _this_ TCP connection. Passed by TCP stack down to the
+ *       driver, which in turn inserts the MSS into the @txdlh.
+ *
+ * This API is part of the preparation of the transmit descriptor for posting
+ * (via vxge_hw_fifo_txdl_post()). The related "preparation" APIs include
+ * vxge_hw_fifo_txdl_buffer_set(), vxge_hw_fifo_txdl_buffer_set_aligned(),
+ * and vxge_hw_fifo_txdl_cksum_set_bits().
+ * All these APIs fill in the fields of the fifo descriptor,
+ * in accordance with the Titan specification.
+ *
+ */
+static inline void vxge_hw_fifo_txdl_mss_set(void *txdlh, int mss)
+{
+	struct vxge_hw_fifo_txd *txdp = (struct vxge_hw_fifo_txd *)txdlh;
+
+	txdp->control_0 |= VXGE_HW_FIFO_TXD_LSO_EN;
+	txdp->control_0 |= VXGE_HW_FIFO_TXD_LSO_MSS(mss);
+}
+
+/**
+ * vxge_hw_fifo_txdl_vlan_set - Set VLAN tag.
+ * @txdlh: Descriptor handle.
+ * @vlan_tag: 16bit VLAN tag.
+ *
+ * Insert VLAN tag into specified transmit descriptor.
+ * The actual insertion of the tag into outgoing frame is done by the hardware.
+ */
+static inline void vxge_hw_fifo_txdl_vlan_set(void *txdlh, u16 vlan_tag)
+{
+	struct vxge_hw_fifo_txd *txdp = (struct vxge_hw_fifo_txd *)txdlh;
+
+	txdp->control_1 |= VXGE_HW_FIFO_TXD_VLAN_ENABLE;
+	txdp->control_1 |= VXGE_HW_FIFO_TXD_VLAN_TAG(vlan_tag);
+}
+
+/**
+ * vxge_hw_fifo_txdl_private_get - Retrieve per-descriptor private data.
+ * @txdlh: Descriptor handle.
+ *
+ * Retrieve per-descriptor private data.
+ * Note that driver requests per-descriptor space via
+ * struct vxge_hw_fifo_attr passed to
+ * vxge_hw_vpath_open().
+ *
+ * Returns: private driver data associated with the descriptor.
+ */
+static inline void *vxge_hw_fifo_txdl_private_get(void *txdlh)
+{
+	struct vxge_hw_fifo_txd *txdp  = (struct vxge_hw_fifo_txd *)txdlh;
+
+	return (void *)(size_t)txdp->host_control;
+}
+
+/**
+ * struct vxge_hw_ring_attr - Ring open "template".
+ * @callback: Ring completion callback. HW invokes the callback when there
+ *            are new completions on that ring. In many implementations
+ *            the @callback executes in the hw interrupt context.
+ * @rxd_init: Ring's descriptor-initialize callback.
+ *            See vxge_hw_ring_rxd_init_f{}.
+ *            If not NULL, HW invokes the callback when opening
+ *            the ring.
+ * @rxd_term: Ring's descriptor-terminate callback. If not NULL,
+ *          HW invokes the callback when closing the corresponding ring.
+ *          See also vxge_hw_ring_rxd_term_f{}.
+ * @userdata: User-defined "context" of _that_ ring. Passed back to the
+ *            user as one of the @callback, @rxd_init, and @rxd_term arguments.
+ * @per_rxd_space: If specified (i.e., greater than zero): extra space
+ *              reserved by HW per each receive descriptor.
+ *              Can be used to store
+ *              and retrieve on completion, information specific
+ *              to the driver.
+ *
+ * Ring open "template". User fills the structure with ring
+ * attributes and passes it to vxge_hw_vpath_open().
+ */
+struct vxge_hw_ring_attr {
+	enum vxge_hw_status (*callback)(
+			struct __vxge_hw_ring *ringh,
+			void *rxdh,
+			u8 t_code,
+			void *userdata);
+
+	enum vxge_hw_status (*rxd_init)(
+			void *rxdh,
+			void *userdata);
+
+	void (*rxd_term)(
+			void *rxdh,
+			enum vxge_hw_rxd_state state,
+			void *userdata);
+
+	void		*userdata;
+	u32		per_rxd_space;
+};
+
+/**
+ * function vxge_hw_fifo_callback_f - FIFO callback.
+ * @vpath_handle: Virtual path whose Fifo "containing" 1 or more completed
+ *             descriptors.
+ * @txdlh: First completed descriptor.
+ * @txdl_priv: Pointer to per txdl space allocated
+ * @t_code: Transfer code, as per Titan User Guide.
+ *          Returned by HW.
+ * @host_control: Opaque 64bit data stored by driver inside the Titan
+ *            descriptor prior to posting the latter on the fifo
+ *            via vxge_hw_fifo_txdl_post(). The @host_control is returned
+ *            as is to the driver with each completed descriptor.
+ * @userdata: Opaque per-fifo data specified at fifo open
+ *            time, via vxge_hw_vpath_open().
+ *
+ * Fifo completion callback (type declaration). A single per-fifo
+ * callback is specified at fifo open time, via
+ * vxge_hw_vpath_open(). Typically gets called as part of the processing
+ * of the Interrupt Service Routine.
+ *
+ * Fifo callback gets called by HW if, and only if, there is at least
+ * one new completion on a given fifo. Upon processing the first @txdlh driver
+ * is _supposed_ to continue consuming completions using:
+ *    - vxge_hw_fifo_txdl_next_completed()
+ *
+ * Note that failure to process new completions in a timely fashion
+ * leads to VXGE_HW_INF_OUT_OF_DESCRIPTORS condition.
+ *
+ * Non-zero @t_code means failure to process transmit descriptor.
+ *
+ * In the "transmit" case the failure could happen, for instance, when the
+ * link is down, in which case Titan completes the descriptor because it
+ * is not able to send the data out.
+ *
+ * For details please refer to Titan User Guide.
+ *
+ * See also: vxge_hw_fifo_txdl_next_completed(), vxge_hw_fifo_txdl_term_f{}.
+ */
+/**
+ * function vxge_hw_fifo_txdl_term_f - Terminate descriptor callback.
+ * @txdlh: First completed descriptor.
+ * @txdl_priv: Pointer to per txdl space allocated
+ * @state: One of the enum vxge_hw_txdl_state{} enumerated states.
+ * @userdata: Per-fifo user data (a.k.a. context) specified at
+ * fifo open time, via vxge_hw_vpath_open().
+ *
+ * Terminate descriptor callback. Unless NULL is specified in the
+ * struct vxge_hw_fifo_attr{} structure passed to vxge_hw_vpath_open()),
+ * HW invokes the callback as part of closing fifo, prior to
+ * de-allocating the ring and associated data structures
+ * (including descriptors).
+ * driver should utilize the callback to (for instance) unmap
+ * and free DMA data buffers associated with the posted (state =
+ * VXGE_HW_TXDL_STATE_POSTED) descriptors,
+ * as well as other relevant cleanup functions.
+ *
+ * See also: struct vxge_hw_fifo_attr{}
+ */
+/**
+ * struct vxge_hw_fifo_attr - Fifo open "template".
+ * @callback: Fifo completion callback. HW invokes the callback when there
+ *            are new completions on that fifo. In many implementations
+ *            the @callback executes in the hw interrupt context.
+ * @txdl_term: Fifo's descriptor-terminate callback. If not NULL,
+ *          HW invokes the callback when closing the corresponding fifo.
+ *          See also vxge_hw_fifo_txdl_term_f{}.
+ * @userdata: User-defined "context" of _that_ fifo. Passed back to the
+ *            user as one of the @callback, and @txdl_term arguments.
+ * @per_txdl_space: If specified (i.e., greater than zero): extra space
+ *              reserved by HW per each transmit descriptor. Can be used to
+ *              store, and retrieve on completion, information specific
+ *              to the driver.
+ *
+ * Fifo open "template". User fills the structure with fifo
+ * attributes and passes it to vxge_hw_vpath_open().
+ */
+struct vxge_hw_fifo_attr {
+
+	enum vxge_hw_status (*callback)(
+			struct __vxge_hw_fifo *fifo_handle,
+			void *txdlh,
+			enum vxge_hw_fifo_tcode t_code,
+			void *userdata,
+			void **skb_ptr);
+
+	void (*txdl_term)(
+			void *txdlh,
+			enum vxge_hw_txdl_state state,
+			void *userdata);
+
+	void		*userdata;
+	u32		per_txdl_space;
+};
+
+/**
+ * struct vxge_hw_vpath_attr - Attributes of virtual path
+ * @vp_id: Identifier of Virtual Path
+ * @ring_attr: Attributes of ring for non-offload receive
+ * @fifo_attr: Attributes of fifo for non-offload transmit
+ *
+ * Attributes of virtual path.  This structure is passed as parameter
+ * to the vxge_hw_vpath_open() routine to set the attributes of ring and fifo.
+ */
+struct vxge_hw_vpath_attr {
+	u32				vp_id;
+	struct vxge_hw_ring_attr	ring_attr;
+	struct vxge_hw_fifo_attr	fifo_attr;
+};
+
+enum vxge_hw_status
+__vxge_hw_blockpool_create(struct __vxge_hw_device *hldev,
+			struct __vxge_hw_blockpool  *blockpool,
+			u32 pool_size,
+			u32 pool_max);
+
+void
+__vxge_hw_blockpool_destroy(struct __vxge_hw_blockpool  *blockpool);
+
+struct __vxge_hw_blockpool_entry *
+__vxge_hw_blockpool_block_allocate(struct __vxge_hw_device *hldev,
+			u32 size);
+
+void
+__vxge_hw_blockpool_block_free(struct __vxge_hw_device *hldev,
+			struct __vxge_hw_blockpool_entry *entry);
+
+void *
+__vxge_hw_blockpool_malloc(struct __vxge_hw_device *hldev,
+			u32 size,
+			struct vxge_hw_mempool_dma *dma_object);
+
+void
+__vxge_hw_blockpool_free(struct __vxge_hw_device *hldev,
+			void *memblock,
+			u32 size,
+			struct vxge_hw_mempool_dma *dma_object);
+
+enum vxge_hw_status
+__vxge_hw_device_fifo_config_check(struct vxge_hw_fifo_config *fifo_config);
+
+enum vxge_hw_status
+__vxge_hw_device_config_check(struct vxge_hw_device_config *new_config);
+
+enum vxge_hw_status
+vxge_hw_mgmt_device_config(struct __vxge_hw_device *devh,
+		struct vxge_hw_device_config	*dev_config, int size);
+
+enum vxge_hw_status __devinit vxge_hw_device_hw_info_get(
+	void __iomem *bar0,
+	struct vxge_hw_device_hw_info *hw_info);
+
+enum vxge_hw_status
+__vxge_hw_vpath_fw_ver_get(
+	u32	vp_id,
+	struct vxge_hw_vpath_reg __iomem *vpath_reg,
+	struct vxge_hw_device_hw_info *hw_info);
+
+enum vxge_hw_status
+__vxge_hw_vpath_card_info_get(
+	u32 vp_id,
+	struct vxge_hw_vpath_reg __iomem *vpath_reg,
+	struct vxge_hw_device_hw_info *hw_info);
+
+enum vxge_hw_status __devinit vxge_hw_device_config_default_get(
+	struct vxge_hw_device_config *device_config);
+
+/**
+ * vxge_hw_device_link_state_get - Get link state.
+ * @devh: HW device handle.
+ *
+ * Get link state.
+ * Returns: link state.
+ */
+static inline
+enum vxge_hw_device_link_state vxge_hw_device_link_state_get(
+	struct __vxge_hw_device *devh)
+{
+	return devh->link_state;
+}
+
+void vxge_hw_device_terminate(struct __vxge_hw_device *devh);
+
+const u8 *
+vxge_hw_device_serial_number_get(struct __vxge_hw_device *devh);
+
+u16 vxge_hw_device_link_width_get(struct __vxge_hw_device *devh);
+
+const u8 *
+vxge_hw_device_product_name_get(struct __vxge_hw_device *devh);
+
+enum vxge_hw_status __devinit vxge_hw_device_initialize(
+	struct __vxge_hw_device **devh,
+	struct vxge_hw_device_attr *attr,
+	struct vxge_hw_device_config *device_config);
+
+enum vxge_hw_status vxge_hw_device_getpause_data(
+	 struct __vxge_hw_device *devh,
+	 u32 port,
+	 u32 *tx,
+	 u32 *rx);
+
+enum vxge_hw_status vxge_hw_device_setpause_data(
+	struct __vxge_hw_device *devh,
+	u32 port,
+	u32 tx,
+	u32 rx);
+
+static inline void *vxge_os_dma_malloc(struct pci_dev *pdev,
+			unsigned long size,
+			struct pci_dev **p_dmah,
+			struct pci_dev **p_dma_acch)
+{
+	gfp_t flags;
+	void *vaddr;
+	unsigned long misaligned = 0;
+	*p_dma_acch = *p_dmah = NULL;
+
+	if (in_interrupt())
+		flags = GFP_ATOMIC | GFP_DMA;
+	else
+		flags = GFP_KERNEL | GFP_DMA;
+
+	size += VXGE_CACHE_LINE_SIZE;
+
+	vaddr = kmalloc((size), flags);
+	if (vaddr == NULL)
+		return vaddr;
+	misaligned = (unsigned long)VXGE_ALIGN(*((u64 *)&vaddr),
+				VXGE_CACHE_LINE_SIZE);
+	*(unsigned long *)p_dma_acch = misaligned;
+	vaddr = (void *)((u8 *)vaddr + misaligned);
+	return vaddr;
+}
+
+extern void vxge_hw_blockpool_block_add(
+			struct __vxge_hw_device *devh,
+			void *block_addr,
+			u32 length,
+			struct pci_dev *dma_h,
+			struct pci_dev *acc_handle);
+
+static inline void vxge_os_dma_malloc_async(struct pci_dev *pdev, void *devh,
+					unsigned long size)
+{
+	gfp_t flags;
+	void *vaddr;
+
+	if (in_interrupt())
+		flags = GFP_ATOMIC | GFP_DMA;
+	else
+		flags = GFP_KERNEL | GFP_DMA;
+
+	vaddr = kmalloc((size), flags);
+
+	vxge_hw_blockpool_block_add(devh, vaddr, size, pdev, pdev);
+}
+
+static inline void vxge_os_dma_free(struct pci_dev *pdev, const void *vaddr,
+			struct pci_dev **p_dma_acch)
+{
+	unsigned long misaligned = *(unsigned long *)p_dma_acch;
+	u8 *tmp = (u8 *)vaddr;
+	tmp -= misaligned;
+	kfree((void *)tmp);
+}
+
+/*
+ * __vxge_hw_mempool_item_priv - will return pointer on per item private space
+ */
+static inline void*
+__vxge_hw_mempool_item_priv(
+	struct vxge_hw_mempool *mempool,
+	u32 memblock_idx,
+	void *item,
+	u32 *memblock_item_idx)
+{
+	ptrdiff_t offset;
+	void *memblock = mempool->memblocks_arr[memblock_idx];
+
+
+	offset = (u32)((u8 *)item - (u8 *)memblock);
+	vxge_assert(offset >= 0 && (u32)offset < mempool->memblock_size);
+
+	(*memblock_item_idx) = (u32) offset / mempool->item_size;
+	vxge_assert((*memblock_item_idx) < mempool->items_per_memblock);
+
+	return (u8 *)mempool->memblocks_priv_arr[memblock_idx] +
+			    (*memblock_item_idx) * mempool->items_priv_size;
+}
+
+enum vxge_hw_status
+__vxge_hw_mempool_grow(
+	struct vxge_hw_mempool *mempool,
+	u32 num_allocate,
+	u32 *num_allocated);
+
+struct vxge_hw_mempool*
+__vxge_hw_mempool_create(
+	struct __vxge_hw_device *devh,
+	u32 memblock_size,
+	u32 item_size,
+	u32 private_size,
+	u32 items_initial,
+	u32 items_max,
+	struct vxge_hw_mempool_cbs *mp_callback,
+	void *userdata);
+
+struct __vxge_hw_channel*
+__vxge_hw_channel_allocate(struct __vxge_hw_vpath_handle *vph,
+			enum __vxge_hw_channel_type type, u32 length,
+			u32 per_dtr_space, void *userdata);
+
+void
+__vxge_hw_channel_free(
+	struct __vxge_hw_channel *channel);
+
+enum vxge_hw_status
+__vxge_hw_channel_initialize(
+	struct __vxge_hw_channel *channel);
+
+enum vxge_hw_status
+__vxge_hw_channel_reset(
+	struct __vxge_hw_channel *channel);
+
+/*
+ * __vxge_hw_fifo_txdl_priv - Return the max fragments allocated
+ * for the fifo.
+ * @fifo: Fifo
+ * @txdp: Poniter to a TxD
+ */
+static inline struct __vxge_hw_fifo_txdl_priv *
+__vxge_hw_fifo_txdl_priv(
+	struct __vxge_hw_fifo *fifo,
+	struct vxge_hw_fifo_txd *txdp)
+{
+	return (struct __vxge_hw_fifo_txdl_priv *)
+			(((char *)((ulong)txdp->host_control)) +
+				fifo->per_txdl_space);
+}
+
+enum vxge_hw_status vxge_hw_vpath_open(
+	struct __vxge_hw_device *devh,
+	struct vxge_hw_vpath_attr *attr,
+	struct __vxge_hw_vpath_handle **vpath_handle);
+
+enum vxge_hw_status
+__vxge_hw_device_vpath_reset_in_prog_check(u64 __iomem *vpath_rst_in_prog);
+
+enum vxge_hw_status vxge_hw_vpath_close(
+	struct __vxge_hw_vpath_handle *vpath_handle);
+
+enum vxge_hw_status
+vxge_hw_vpath_reset(
+	struct __vxge_hw_vpath_handle *vpath_handle);
+
+enum vxge_hw_status
+vxge_hw_vpath_recover_from_reset(
+	struct __vxge_hw_vpath_handle *vpath_handle);
+
+void
+vxge_hw_vpath_enable(struct __vxge_hw_vpath_handle *vp);
+
+enum vxge_hw_status
+vxge_hw_vpath_check_leak(struct __vxge_hw_ring *ringh);
+
+enum vxge_hw_status vxge_hw_vpath_mtu_set(
+	struct __vxge_hw_vpath_handle *vpath_handle,
+	u32 new_mtu);
+
+enum vxge_hw_status vxge_hw_vpath_stats_enable(
+	struct __vxge_hw_vpath_handle *vpath_handle);
+
+enum vxge_hw_status
+__vxge_hw_vpath_stats_access(
+	struct __vxge_hw_virtualpath	*vpath,
+	u32			operation,
+	u32			offset,
+	u64			*stat);
+
+enum vxge_hw_status
+__vxge_hw_vpath_xmac_tx_stats_get(
+	struct __vxge_hw_virtualpath	*vpath,
+	struct vxge_hw_xmac_vpath_tx_stats *vpath_tx_stats);
+
+enum vxge_hw_status
+__vxge_hw_vpath_xmac_rx_stats_get(
+	struct __vxge_hw_virtualpath	*vpath,
+	struct vxge_hw_xmac_vpath_rx_stats *vpath_rx_stats);
+
+enum vxge_hw_status
+__vxge_hw_vpath_stats_get(
+	struct __vxge_hw_virtualpath *vpath,
+	struct vxge_hw_vpath_stats_hw_info *hw_stats);
+
+void
+vxge_hw_vpath_rx_doorbell_init(struct __vxge_hw_vpath_handle *vp);
+
+enum vxge_hw_status
+__vxge_hw_device_vpath_config_check(struct vxge_hw_vp_config *vp_config);
+
+void
+__vxge_hw_device_pci_e_init(struct __vxge_hw_device *hldev);
+
+enum vxge_hw_status
+__vxge_hw_legacy_swapper_set(struct vxge_hw_legacy_reg __iomem *legacy_reg);
+
+enum vxge_hw_status
+__vxge_hw_vpath_swapper_set(struct vxge_hw_vpath_reg __iomem *vpath_reg);
+
+enum vxge_hw_status
+__vxge_hw_kdfc_swapper_set(struct vxge_hw_legacy_reg __iomem *legacy_reg,
+	struct vxge_hw_vpath_reg __iomem *vpath_reg);
+
+enum vxge_hw_status
+__vxge_hw_device_register_poll(
+	void __iomem	*reg,
+	u64 mask, u32 max_millis);
+
+#ifndef readq
+static inline u64 readq(void __iomem *addr)
+{
+	u64 ret = 0;
+	ret = readl(addr + 4);
+	ret <<= 32;
+	ret |= readl(addr);
+
+	return ret;
+}
+#endif
+
+#ifndef writeq
+static inline void writeq(u64 val, void __iomem *addr)
+{
+	writel((u32) (val), addr);
+	writel((u32) (val >> 32), (addr + 4));
+}
+#endif
+
+static inline void __vxge_hw_pio_mem_write32_upper(u32 val, void __iomem *addr)
+{
+	writel(val, addr + 4);
+}
+
+static inline void __vxge_hw_pio_mem_write32_lower(u32 val, void __iomem *addr)
+{
+	writel(val, addr);
+}
+
+static inline enum vxge_hw_status
+__vxge_hw_pio_mem_write64(u64 val64, void __iomem *addr,
+			  u64 mask, u32 max_millis)
+{
+	enum vxge_hw_status status = VXGE_HW_OK;
+
+	__vxge_hw_pio_mem_write32_lower((u32)vxge_bVALn(val64, 32, 32), addr);
+	wmb();
+	__vxge_hw_pio_mem_write32_upper((u32)vxge_bVALn(val64, 0, 32), addr);
+	wmb();
+
+	status = __vxge_hw_device_register_poll(addr, mask, max_millis);
+	return status;
+}
+
+struct vxge_hw_toc_reg __iomem *
+__vxge_hw_device_toc_get(void __iomem *bar0);
+
+enum vxge_hw_status
+__vxge_hw_device_reg_addr_get(struct __vxge_hw_device *hldev);
+
+void
+__vxge_hw_device_id_get(struct __vxge_hw_device *hldev);
+
+void
+__vxge_hw_device_host_info_get(struct __vxge_hw_device *hldev);
+
+enum vxge_hw_status
+vxge_hw_device_flick_link_led(struct __vxge_hw_device *devh, u64 on_off);
+
+enum vxge_hw_status
+__vxge_hw_device_initialize(struct __vxge_hw_device *hldev);
+
+enum vxge_hw_status
+__vxge_hw_vpath_pci_read(
+	struct __vxge_hw_virtualpath	*vpath,
+	u32			phy_func_0,
+	u32			offset,
+	u32			*val);
+
+enum vxge_hw_status
+__vxge_hw_vpath_addr_get(
+	u32 vp_id,
+	struct vxge_hw_vpath_reg __iomem *vpath_reg,
+	u8 (macaddr)[ETH_ALEN],
+	u8 (macaddr_mask)[ETH_ALEN]);
+
+u32
+__vxge_hw_vpath_func_id_get(
+	u32 vp_id, struct vxge_hw_vpmgmt_reg __iomem *vpmgmt_reg);
+
+enum vxge_hw_status
+__vxge_hw_vpath_reset_check(struct __vxge_hw_virtualpath *vpath);
+
+/**
+ * vxge_debug
+ * @level: level of debug verbosity.
+ * @mask: mask for the debug
+ * @buf: Circular buffer for tracing
+ * @fmt: printf like format string
+ *
+ * Provides logging facilities. Can be customized on per-module
+ * basis or/and with debug levels. Input parameters, except
+ * module and level, are the same as posix printf. This function
+ * may be compiled out if DEBUG macro was never defined.
+ * See also: enum vxge_debug_level{}.
+ */
+
+#define vxge_trace_aux(level, mask, fmt, ...) \
+{\
+		vxge_os_vaprintf(level, mask, fmt, __VA_ARGS__);\
+}
+
+#define vxge_debug(module, level, mask, fmt, ...) { \
+if ((level >= VXGE_TRACE && ((module & VXGE_DEBUG_TRACE_MASK) == module)) || \
+	(level >= VXGE_ERR && ((module & VXGE_DEBUG_ERR_MASK) == module))) {\
+	if ((mask & VXGE_DEBUG_MASK) == mask)\
+		vxge_trace_aux(level, mask, fmt, __VA_ARGS__); \
+} \
+}
+
+#if (VXGE_COMPONENT_LL & VXGE_DEBUG_MODULE_MASK)
+#define vxge_debug_ll(level, mask, fmt, ...) \
+{\
+	vxge_debug(VXGE_COMPONENT_LL, level, mask, fmt, __VA_ARGS__);\
+}
+
+#else
+#define vxge_debug_ll(level, mask, fmt, ...)
+#endif
+
+enum vxge_hw_status vxge_hw_vpath_rts_rth_itable_set(
+			struct __vxge_hw_vpath_handle **vpath_handles,
+			u32 vpath_count,
+			u8 *mtable,
+			u8 *itable,
+			u32 itable_size);
+
+enum vxge_hw_status vxge_hw_vpath_rts_rth_set(
+	struct __vxge_hw_vpath_handle *vpath_handle,
+	enum vxge_hw_rth_algoritms algorithm,
+	struct vxge_hw_rth_hash_types *hash_type,
+	u16 bucket_size);
+
+#endif