/******************************************************************************
 * 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.c: Driver for Exar Corp's X3100 Series 10GbE PCIe I/O
 *                Virtualized Server Adapter.
 * Copyright(c) 2002-2010 Exar Corp.
 ******************************************************************************/
#include <linux/vmalloc.h>
#include <linux/etherdevice.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <linux/slab.h>

#include "vxge-traffic.h"
#include "vxge-config.h"
#include "vxge-main.h"

#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;                                          \
}

static void
vxge_hw_vpath_set_zero_rx_frm_len(struct vxge_hw_vpath_reg __iomem *vp_reg)
{
        u64 val64;

        val64 = readq(&vp_reg->rxmac_vcfg0);
        val64 &= ~VXGE_HW_RXMAC_VCFG0_RTS_MAX_FRM_LEN(0x3fff);
        writeq(val64, &vp_reg->rxmac_vcfg0);
        val64 = readq(&vp_reg->rxmac_vcfg0);
}

/*
 * vxge_hw_vpath_wait_receive_idle - Wait for Rx to become idle
 */
int vxge_hw_vpath_wait_receive_idle(struct __vxge_hw_device *hldev, u32 vp_id)
{
        struct vxge_hw_vpath_reg __iomem *vp_reg;
        struct __vxge_hw_virtualpath *vpath;
        u64 val64, rxd_count, rxd_spat;
        int count = 0, total_count = 0;

        vpath = &hldev->virtual_paths[vp_id];
        vp_reg = vpath->vp_reg;

        vxge_hw_vpath_set_zero_rx_frm_len(vp_reg);

        /* Check that the ring controller for this vpath has enough free RxDs
         * to send frames to the host.  This is done by reading the
         * PRC_RXD_DOORBELL_VPn register and comparing the read value to the
         * RXD_SPAT value for the vpath.
         */
        val64 = readq(&vp_reg->prc_cfg6);
        rxd_spat = VXGE_HW_PRC_CFG6_GET_RXD_SPAT(val64) + 1;
        /* Use a factor of 2 when comparing rxd_count against rxd_spat for some
         * leg room.
         */
        rxd_spat *= 2;

        do {
                mdelay(1);

                rxd_count = readq(&vp_reg->prc_rxd_doorbell);

                /* Check that the ring controller for this vpath does
                 * not have any frame in its pipeline.
                 */
                val64 = readq(&vp_reg->frm_in_progress_cnt);
                if ((rxd_count <= rxd_spat) || (val64 > 0))
                        count = 0;
                else
                        count++;
                total_count++;
        } while ((count < VXGE_HW_MIN_SUCCESSIVE_IDLE_COUNT) &&
                        (total_count < VXGE_HW_MAX_POLLING_COUNT));

        if (total_count >= VXGE_HW_MAX_POLLING_COUNT)
                printk(KERN_ALERT "%s: Still Receiving traffic. Abort wait\n",
                        __func__);

        return total_count;
}

/* vxge_hw_device_wait_receive_idle - This function waits until all frames
 * stored in the frame buffer for each vpath assigned to the given
 * function (hldev) have been sent to the host.
 */
void vxge_hw_device_wait_receive_idle(struct __vxge_hw_device *hldev)
{
        int i, total_count = 0;

        for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
                if (!(hldev->vpaths_deployed & vxge_mBIT(i)))
                        continue;

                total_count += vxge_hw_vpath_wait_receive_idle(hldev, i);
                if (total_count >= VXGE_HW_MAX_POLLING_COUNT)
                        break;
        }
}

/*
 * __vxge_hw_device_register_poll
 * Will poll certain register for specified amount of time.
 * Will poll until masked bit is not cleared.
 */
static enum vxge_hw_status
__vxge_hw_device_register_poll(void __iomem *reg, u64 mask, u32 max_millis)
{
        u64 val64;
        u32 i = 0;
        enum vxge_hw_status ret = VXGE_HW_FAIL;

        udelay(10);

        do {
                val64 = readq(reg);
                if (!(val64 & mask))
                        return VXGE_HW_OK;
                udelay(100);
        } while (++i <= 9);

        i = 0;
        do {
                val64 = readq(reg);
                if (!(val64 & mask))
                        return VXGE_HW_OK;
                mdelay(1);
        } while (++i <= max_millis);

        return ret;
}

static inline enum vxge_hw_status
__vxge_hw_pio_mem_write64(u64 val64, void __iomem *addr,
                          u64 mask, u32 max_millis)
{
        __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();

        return __vxge_hw_device_register_poll(addr, mask, max_millis);
}

static enum vxge_hw_status
vxge_hw_vpath_fw_api(struct __vxge_hw_virtualpath *vpath, u32 action,
                     u32 fw_memo, u32 offset, u64 *data0, u64 *data1,
                     u64 *steer_ctrl)
{
        struct vxge_hw_vpath_reg __iomem *vp_reg = vpath->vp_reg;
        enum vxge_hw_status status;
        u64 val64;
        u32 retry = 0, max_retry = 3;

        spin_lock(&vpath->lock);
        if (!vpath->vp_open) {
                spin_unlock(&vpath->lock);
                max_retry = 100;
        }

        writeq(*data0, &vp_reg->rts_access_steer_data0);
        writeq(*data1, &vp_reg->rts_access_steer_data1);
        wmb();

        val64 = VXGE_HW_RTS_ACCESS_STEER_CTRL_ACTION(action) |
                VXGE_HW_RTS_ACCESS_STEER_CTRL_DATA_STRUCT_SEL(fw_memo) |
                VXGE_HW_RTS_ACCESS_STEER_CTRL_OFFSET(offset) |
                VXGE_HW_RTS_ACCESS_STEER_CTRL_STROBE |
                *steer_ctrl;

        status = __vxge_hw_pio_mem_write64(val64,
                                           &vp_reg->rts_access_steer_ctrl,
                                           VXGE_HW_RTS_ACCESS_STEER_CTRL_STROBE,
                                           VXGE_HW_DEF_DEVICE_POLL_MILLIS);

        /* The __vxge_hw_device_register_poll can udelay for a significant
         * amount of time, blocking other process from the CPU.  If it delays
         * for ~5secs, a NMI error can occur.  A way around this is to give up
         * the processor via msleep, but this is not allowed is under lock.
         * So, only allow it to sleep for ~4secs if open.  Otherwise, delay for
         * 1sec and sleep for 10ms until the firmware operation has completed
         * or timed-out.
         */
        while ((status != VXGE_HW_OK) && retry++ < max_retry) {
                if (!vpath->vp_open)
                        msleep(20);
                status = __vxge_hw_device_register_poll(
                                        &vp_reg->rts_access_steer_ctrl,
                                        VXGE_HW_RTS_ACCESS_STEER_CTRL_STROBE,
                                        VXGE_HW_DEF_DEVICE_POLL_MILLIS);
        }

        if (status != VXGE_HW_OK)
                goto out;

        val64 = readq(&vp_reg->rts_access_steer_ctrl);
        if (val64 & VXGE_HW_RTS_ACCESS_STEER_CTRL_RMACJ_STATUS) {
                *data0 = readq(&vp_reg->rts_access_steer_data0);
                *data1 = readq(&vp_reg->rts_access_steer_data1);
                *steer_ctrl = val64;
        } else
                status = VXGE_HW_FAIL;

out:
        if (vpath->vp_open)
                spin_unlock(&vpath->lock);
        return status;
}

enum vxge_hw_status
vxge_hw_upgrade_read_version(struct __vxge_hw_device *hldev, u32 *major,
                             u32 *minor, u32 *build)
{
        u64 data0 = 0, data1 = 0, steer_ctrl = 0;
        struct __vxge_hw_virtualpath *vpath;
        enum vxge_hw_status status;

        vpath = &hldev->virtual_paths[hldev->first_vp_id];

        status = vxge_hw_vpath_fw_api(vpath,
                                      VXGE_HW_FW_UPGRADE_ACTION,
                                      VXGE_HW_FW_UPGRADE_MEMO,
                                      VXGE_HW_FW_UPGRADE_OFFSET_READ,
                                      &data0, &data1, &steer_ctrl);
        if (status != VXGE_HW_OK)
                return status;

        *major = VXGE_HW_RTS_ACCESS_STEER_DATA0_GET_FW_VER_MAJOR(data0);
        *minor = VXGE_HW_RTS_ACCESS_STEER_DATA0_GET_FW_VER_MINOR(data0);
        *build = VXGE_HW_RTS_ACCESS_STEER_DATA0_GET_FW_VER_BUILD(data0);

        return status;
}

enum vxge_hw_status vxge_hw_flash_fw(struct __vxge_hw_device *hldev)
{
        u64 data0 = 0, data1 = 0, steer_ctrl = 0;
        struct __vxge_hw_virtualpath *vpath;
        enum vxge_hw_status status;
        u32 ret;

        vpath = &hldev->virtual_paths[hldev->first_vp_id];

        status = vxge_hw_vpath_fw_api(vpath,
                                      VXGE_HW_FW_UPGRADE_ACTION,
                                      VXGE_HW_FW_UPGRADE_MEMO,
                                      VXGE_HW_FW_UPGRADE_OFFSET_COMMIT,
                                      &data0, &data1, &steer_ctrl);
        if (status != VXGE_HW_OK) {
                vxge_debug_init(VXGE_ERR, "%s: FW upgrade failed", __func__);
                goto exit;
        }

        ret = VXGE_HW_RTS_ACCESS_STEER_CTRL_GET_ACTION(steer_ctrl) & 0x7F;
        if (ret != 1) {
                vxge_debug_init(VXGE_ERR, "%s: FW commit failed with error %d",
                                __func__, ret);
                status = VXGE_HW_FAIL;
        }

exit:
        return status;
}

enum vxge_hw_status
vxge_update_fw_image(struct __vxge_hw_device *hldev, const u8 *fwdata, int size)
{
        u64 data0 = 0, data1 = 0, steer_ctrl = 0;
        struct __vxge_hw_virtualpath *vpath;
        enum vxge_hw_status status;
        int ret_code, sec_code;

        vpath = &hldev->virtual_paths[hldev->first_vp_id];

        /* send upgrade start command */
        status = vxge_hw_vpath_fw_api(vpath,
                                      VXGE_HW_FW_UPGRADE_ACTION,
                                      VXGE_HW_FW_UPGRADE_MEMO,
                                      VXGE_HW_FW_UPGRADE_OFFSET_START,
                                      &data0, &data1, &steer_ctrl);
        if (status != VXGE_HW_OK) {
                vxge_debug_init(VXGE_ERR, " %s: Upgrade start cmd failed",
                                __func__);
                return status;
        }

        /* Transfer fw image to adapter 16 bytes at a time */
        for (; size > 0; size -= VXGE_HW_FW_UPGRADE_BLK_SIZE) {
                steer_ctrl = 0;

                /* The next 128bits of fwdata to be loaded onto the adapter */
                data0 = *((u64 *)fwdata);
                data1 = *((u64 *)fwdata + 1);

                status = vxge_hw_vpath_fw_api(vpath,
                                              VXGE_HW_FW_UPGRADE_ACTION,
                                              VXGE_HW_FW_UPGRADE_MEMO,
                                              VXGE_HW_FW_UPGRADE_OFFSET_SEND,
                                              &data0, &data1, &steer_ctrl);
                if (status != VXGE_HW_OK) {
                        vxge_debug_init(VXGE_ERR, "%s: Upgrade send failed",
                                        __func__);
                        goto out;
                }

                ret_code = VXGE_HW_UPGRADE_GET_RET_ERR_CODE(data0);
                switch (ret_code) {
                case VXGE_HW_FW_UPGRADE_OK:
                        /* All OK, send next 16 bytes. */
                        break;
                case VXGE_FW_UPGRADE_BYTES2SKIP:
                        /* skip bytes in the stream */
                        fwdata += (data0 >> 8) & 0xFFFFFFFF;
                        break;
                case VXGE_HW_FW_UPGRADE_DONE:
                        goto out;
                case VXGE_HW_FW_UPGRADE_ERR:
                        sec_code = VXGE_HW_UPGRADE_GET_SEC_ERR_CODE(data0);
                        switch (sec_code) {
                        case VXGE_HW_FW_UPGRADE_ERR_CORRUPT_DATA_1:
                        case VXGE_HW_FW_UPGRADE_ERR_CORRUPT_DATA_7:
                                printk(KERN_ERR
                                       "corrupted data from .ncf file\n");
                                break;
                        case VXGE_HW_FW_UPGRADE_ERR_INV_NCF_FILE_3:
                        case VXGE_HW_FW_UPGRADE_ERR_INV_NCF_FILE_4:
                        case VXGE_HW_FW_UPGRADE_ERR_INV_NCF_FILE_5:
                        case VXGE_HW_FW_UPGRADE_ERR_INV_NCF_FILE_6:
                        case VXGE_HW_FW_UPGRADE_ERR_INV_NCF_FILE_8:
                                printk(KERN_ERR "invalid .ncf file\n");
                                break;
                        case VXGE_HW_FW_UPGRADE_ERR_BUFFER_OVERFLOW:
                                printk(KERN_ERR "buffer overflow\n");
                                break;
                        case VXGE_HW_FW_UPGRADE_ERR_FAILED_TO_FLASH:
                                printk(KERN_ERR "failed to flash the image\n");
                                break;
                        case VXGE_HW_FW_UPGRADE_ERR_GENERIC_ERROR_UNKNOWN:
                                printk(KERN_ERR
                                       "generic error. Unknown error type\n");
                                break;
                        default:
                                printk(KERN_ERR "Unknown error of type %d\n",
                                       sec_code);
                                break;
                        }
                        status = VXGE_HW_FAIL;
                        goto out;
                default:
                        printk(KERN_ERR "Unknown FW error: %d\n", ret_code);
                        status = VXGE_HW_FAIL;
                        goto out;
                }
                /* point to next 16 bytes */
                fwdata += VXGE_HW_FW_UPGRADE_BLK_SIZE;
        }
out:
        return status;
}

enum vxge_hw_status
vxge_hw_vpath_eprom_img_ver_get(struct __vxge_hw_device *hldev,
                                struct eprom_image *img)
{
        u64 data0 = 0, data1 = 0, steer_ctrl = 0;
        struct __vxge_hw_virtualpath *vpath;
        enum vxge_hw_status status;
        int i;

        vpath = &hldev->virtual_paths[hldev->first_vp_id];

        for (i = 0; i < VXGE_HW_MAX_ROM_IMAGES; i++) {
                data0 = VXGE_HW_RTS_ACCESS_STEER_ROM_IMAGE_INDEX(i);
                data1 = steer_ctrl = 0;

                status = vxge_hw_vpath_fw_api(vpath,
                        VXGE_HW_FW_API_GET_EPROM_REV,
                        VXGE_HW_RTS_ACCESS_STEER_CTRL_DATA_STRUCT_SEL_FW_MEMO,
                        0, &data0, &data1, &steer_ctrl);
                if (status != VXGE_HW_OK)
                        break;

                img[i].is_valid = VXGE_HW_GET_EPROM_IMAGE_VALID(data0);
                img[i].index = VXGE_HW_GET_EPROM_IMAGE_INDEX(data0);
                img[i].type = VXGE_HW_GET_EPROM_IMAGE_TYPE(data0);
                img[i].version = VXGE_HW_GET_EPROM_IMAGE_REV(data0);
        }

        return status;
}

/*
 * __vxge_hw_channel_free - Free memory allocated for channel
 * This function deallocates memory from the channel and various arrays
 * in the channel
 */
static void __vxge_hw_channel_free(struct __vxge_hw_channel *channel)
{
        kfree(channel->work_arr);
        kfree(channel->free_arr);
        kfree(channel->reserve_arr);
        kfree(channel->orig_arr);
        kfree(channel);
}

/*
 * __vxge_hw_channel_initialize - Initialize a channel
 * This function initializes a channel by properly setting the
 * various references
 */
static enum vxge_hw_status
__vxge_hw_channel_initialize(struct __vxge_hw_channel *channel)
{
        u32 i;
        struct __vxge_hw_virtualpath *vpath;

        vpath = channel->vph->vpath;

        if ((channel->reserve_arr != NULL) && (channel->orig_arr != NULL)) {
                for (i = 0; i < channel->length; i++)
                        channel->orig_arr[i] = channel->reserve_arr[i];
        }

        switch (channel->type) {
        case VXGE_HW_CHANNEL_TYPE_FIFO:
                vpath->fifoh = (struct __vxge_hw_fifo *)channel;
                channel->stats = &((struct __vxge_hw_fifo *)
                                channel)->stats->common_stats;
                break;
        case VXGE_HW_CHANNEL_TYPE_RING:
                vpath->ringh = (struct __vxge_hw_ring *)channel;
                channel->stats = &((struct __vxge_hw_ring *)
                                channel)->stats->common_stats;
                break;
        default:
                break;
        }

        return VXGE_HW_OK;
}

/*
 * __vxge_hw_channel_reset - Resets a channel
 * This function resets a channel by properly setting the various references
 */
static enum vxge_hw_status
__vxge_hw_channel_reset(struct __vxge_hw_channel *channel)
{
        u32 i;

        for (i = 0; i < channel->length; i++) {
                if (channel->reserve_arr != NULL)
                        channel->reserve_arr[i] = channel->orig_arr[i];
                if (channel->free_arr != NULL)
                        channel->free_arr[i] = NULL;
                if (channel->work_arr != NULL)
                        channel->work_arr[i] = NULL;
        }
        channel->free_ptr = channel->length;
        channel->reserve_ptr = channel->length;
        channel->reserve_top = 0;
        channel->post_index = 0;
        channel->compl_index = 0;

        return VXGE_HW_OK;
}

/*
 * __vxge_hw_device_pci_e_init
 * Initialize certain PCI/PCI-X configuration registers
 * with recommended values. Save config space for future hw resets.
 */
static void __vxge_hw_device_pci_e_init(struct __vxge_hw_device *hldev)
{
        u16 cmd = 0;

        /* Set the PErr Repconse bit and SERR in PCI command register. */
        pci_read_config_word(hldev->pdev, PCI_COMMAND, &cmd);
        cmd |= 0x140;
        pci_write_config_word(hldev->pdev, PCI_COMMAND, cmd);

        pci_save_state(hldev->pdev);
}

/* __vxge_hw_device_vpath_reset_in_prog_check - Check if vpath reset
 * in progress
 * This routine checks the vpath reset in progress register is turned zero
 */
static enum vxge_hw_status
__vxge_hw_device_vpath_reset_in_prog_check(u64 __iomem *vpath_rst_in_prog)
{
        enum vxge_hw_status status;
        status = __vxge_hw_device_register_poll(vpath_rst_in_prog,
                        VXGE_HW_VPATH_RST_IN_PROG_VPATH_RST_IN_PROG(0x1ffff),
                        VXGE_HW_DEF_DEVICE_POLL_MILLIS);
        return status;
}

/*
 * _hw_legacy_swapper_set - Set the swapper bits for the legacy secion.
 * Set the swapper bits appropriately for the lagacy section.
 */
static enum vxge_hw_status
__vxge_hw_legacy_swapper_set(struct vxge_hw_legacy_reg __iomem *legacy_reg)
{
        u64 val64;
        enum vxge_hw_status status = VXGE_HW_OK;

        val64 = readq(&legacy_reg->toc_swapper_fb);

        wmb();

        switch (val64) {
        case VXGE_HW_SWAPPER_INITIAL_VALUE:
                return status;

        case VXGE_HW_SWAPPER_BYTE_SWAPPED_BIT_FLIPPED:
                writeq(VXGE_HW_SWAPPER_READ_BYTE_SWAP_ENABLE,
                        &legacy_reg->pifm_rd_swap_en);
                writeq(VXGE_HW_SWAPPER_READ_BIT_FLAP_ENABLE,
                        &legacy_reg->pifm_rd_flip_en);
                writeq(VXGE_HW_SWAPPER_WRITE_BYTE_SWAP_ENABLE,
                        &legacy_reg->pifm_wr_swap_en);
                writeq(VXGE_HW_SWAPPER_WRITE_BIT_FLAP_ENABLE,
                        &legacy_reg->pifm_wr_flip_en);
                break;

        case VXGE_HW_SWAPPER_BYTE_SWAPPED:
                writeq(VXGE_HW_SWAPPER_READ_BYTE_SWAP_ENABLE,
                        &legacy_reg->pifm_rd_swap_en);
                writeq(VXGE_HW_SWAPPER_WRITE_BYTE_SWAP_ENABLE,
                        &legacy_reg->pifm_wr_swap_en);
                break;

        case VXGE_HW_SWAPPER_BIT_FLIPPED:
                writeq(VXGE_HW_SWAPPER_READ_BIT_FLAP_ENABLE,
                        &legacy_reg->pifm_rd_flip_en);
                writeq(VXGE_HW_SWAPPER_WRITE_BIT_FLAP_ENABLE,
                        &legacy_reg->pifm_wr_flip_en);
                break;
        }

        wmb();

        val64 = readq(&legacy_reg->toc_swapper_fb);

        if (val64 != VXGE_HW_SWAPPER_INITIAL_VALUE)
                status = VXGE_HW_ERR_SWAPPER_CTRL;

        return status;
}

/*
 * __vxge_hw_device_toc_get
 * This routine sets the swapper and reads the toc pointer and returns the
 * memory mapped address of the toc
 */
static struct vxge_hw_toc_reg __iomem *
__vxge_hw_device_toc_get(void __iomem *bar0)
{
        u64 val64;
        struct vxge_hw_toc_reg __iomem *toc = NULL;
        enum vxge_hw_status status;

        struct vxge_hw_legacy_reg __iomem *legacy_reg =
                (struct vxge_hw_legacy_reg __iomem *)bar0;

        status = __vxge_hw_legacy_swapper_set(legacy_reg);
        if (status != VXGE_HW_OK)
                goto exit;

        val64 = readq(&legacy_reg->toc_first_pointer);
        toc = bar0 + val64;
exit:
        return toc;
}

/*
 * __vxge_hw_device_reg_addr_get
 * This routine sets the swapper and reads the toc pointer and initializes the
 * register location pointers in the device object. It waits until the ric is
 * completed initializing registers.
 */
static enum vxge_hw_status
__vxge_hw_device_reg_addr_get(struct __vxge_hw_device *hldev)
{
        u64 val64;
        u32 i;
        enum vxge_hw_status status = VXGE_HW_OK;

        hldev->legacy_reg = hldev->bar0;

        hldev->toc_reg = __vxge_hw_device_toc_get(hldev->bar0);
        if (hldev->toc_reg  == NULL) {
                status = VXGE_HW_FAIL;
                goto exit;
        }

        val64 = readq(&hldev->toc_reg->toc_common_pointer);
        hldev->common_reg = hldev->bar0 + val64;

        val64 = readq(&hldev->toc_reg->toc_mrpcim_pointer);
        hldev->mrpcim_reg = hldev->bar0 + val64;

        for (i = 0; i < VXGE_HW_TITAN_SRPCIM_REG_SPACES; i++) {
                val64 = readq(&hldev->toc_reg->toc_srpcim_pointer[i]);
                hldev->srpcim_reg[i] = hldev->bar0 + val64;
        }

        for (i = 0; i < VXGE_HW_TITAN_VPMGMT_REG_SPACES; i++) {
                val64 = readq(&hldev->toc_reg->toc_vpmgmt_pointer[i]);
                hldev->vpmgmt_reg[i] = hldev->bar0 + val64;
        }

        for (i = 0; i < VXGE_HW_TITAN_VPATH_REG_SPACES; i++) {
                val64 = readq(&hldev->toc_reg->toc_vpath_pointer[i]);
                hldev->vpath_reg[i] = hldev->bar0 + val64;
        }

        val64 = readq(&hldev->toc_reg->toc_kdfc);

        switch (VXGE_HW_TOC_GET_KDFC_INITIAL_BIR(val64)) {
        case 0:
                hldev->kdfc = hldev->bar0 + VXGE_HW_TOC_GET_KDFC_INITIAL_OFFSET(val64) ;
                break;
        default:
                break;
        }

        status = __vxge_hw_device_vpath_reset_in_prog_check(
                        (u64 __iomem *)&hldev->common_reg->vpath_rst_in_prog);
exit:
        return status;
}

/*
 * __vxge_hw_device_access_rights_get: Get Access Rights of the driver
 * This routine returns the Access Rights of the driver
 */
static u32
__vxge_hw_device_access_rights_get(u32 host_type, u32 func_id)
{
        u32 access_rights = VXGE_HW_DEVICE_ACCESS_RIGHT_VPATH;

        switch (host_type) {
        case VXGE_HW_NO_MR_NO_SR_NORMAL_FUNCTION:
                if (func_id == 0) {
                        access_rights |= VXGE_HW_DEVICE_ACCESS_RIGHT_MRPCIM |
                                        VXGE_HW_DEVICE_ACCESS_RIGHT_SRPCIM;
                }
                break;
        case VXGE_HW_MR_NO_SR_VH0_BASE_FUNCTION:
                access_rights |= VXGE_HW_DEVICE_ACCESS_RIGHT_MRPCIM |
                                VXGE_HW_DEVICE_ACCESS_RIGHT_SRPCIM;
                break;
        case VXGE_HW_NO_MR_SR_VH0_FUNCTION0:
                access_rights |= VXGE_HW_DEVICE_ACCESS_RIGHT_MRPCIM |
                                VXGE_HW_DEVICE_ACCESS_RIGHT_SRPCIM;
                break;
        case VXGE_HW_NO_MR_SR_VH0_VIRTUAL_FUNCTION:
        case VXGE_HW_SR_VH_VIRTUAL_FUNCTION:
        case VXGE_HW_MR_SR_VH0_INVALID_CONFIG:
                break;
        case VXGE_HW_SR_VH_FUNCTION0:
        case VXGE_HW_VH_NORMAL_FUNCTION:
                access_rights |= VXGE_HW_DEVICE_ACCESS_RIGHT_SRPCIM;
                break;
        }

        return access_rights;
}
/*
 * __vxge_hw_device_is_privilaged
 * This routine checks if the device function is privilaged or not
 */

enum vxge_hw_status
__vxge_hw_device_is_privilaged(u32 host_type, u32 func_id)
{
        if (__vxge_hw_device_access_rights_get(host_type,
                func_id) &
                VXGE_HW_DEVICE_ACCESS_RIGHT_MRPCIM)
                return VXGE_HW_OK;
        else
                return VXGE_HW_ERR_PRIVILAGED_OPEARATION;
}

/*
 * __vxge_hw_vpath_func_id_get - Get the function id of the vpath.
 * Returns the function number of the vpath.
 */
static u32
__vxge_hw_vpath_func_id_get(struct vxge_hw_vpmgmt_reg __iomem *vpmgmt_reg)
{
        u64 val64;

        val64 = readq(&vpmgmt_reg->vpath_to_func_map_cfg1);

        return
         (u32)VXGE_HW_VPATH_TO_FUNC_MAP_CFG1_GET_VPATH_TO_FUNC_MAP_CFG1(val64);
}

/*
 * __vxge_hw_device_host_info_get
 * This routine returns the host type assignments
 */
static void __vxge_hw_device_host_info_get(struct __vxge_hw_device *hldev)
{
        u64 val64;
        u32 i;

        val64 = readq(&hldev->common_reg->host_type_assignments);

        hldev->host_type =
           (u32)VXGE_HW_HOST_TYPE_ASSIGNMENTS_GET_HOST_TYPE_ASSIGNMENTS(val64);

        hldev->vpath_assignments = readq(&hldev->common_reg->vpath_assignments);

        for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
                if (!(hldev->vpath_assignments & vxge_mBIT(i)))
                        continue;

                hldev->func_id =
                        __vxge_hw_vpath_func_id_get(hldev->vpmgmt_reg[i]);

                hldev->access_rights = __vxge_hw_device_access_rights_get(
                        hldev->host_type, hldev->func_id);

                hldev->virtual_paths[i].vp_open = VXGE_HW_VP_NOT_OPEN;
                hldev->virtual_paths[i].vp_reg = hldev->vpath_reg[i];

                hldev->first_vp_id = i;
                break;
        }
}

/*
 * __vxge_hw_verify_pci_e_info - Validate the pci-e link parameters such as
 * link width and signalling rate.
 */
static enum vxge_hw_status
__vxge_hw_verify_pci_e_info(struct __vxge_hw_device *hldev)
{
        struct pci_dev *dev = hldev->pdev;
        u16 lnk;

        /* Get the negotiated link width and speed from PCI config space */
        pcie_capability_read_word(dev, PCI_EXP_LNKSTA, &lnk);

        if ((lnk & PCI_EXP_LNKSTA_CLS) != 1)
                return VXGE_HW_ERR_INVALID_PCI_INFO;

        switch ((lnk & PCI_EXP_LNKSTA_NLW) >> 4) {
        case PCIE_LNK_WIDTH_RESRV:
        case PCIE_LNK_X1:
        case PCIE_LNK_X2:
        case PCIE_LNK_X4:
        case PCIE_LNK_X8:
                break;
        default:
                return VXGE_HW_ERR_INVALID_PCI_INFO;
        }

        return VXGE_HW_OK;
}

/*
 * __vxge_hw_device_initialize
 * Initialize Titan-V hardware.
 */
static enum vxge_hw_status
__vxge_hw_device_initialize(struct __vxge_hw_device *hldev)
{
        enum vxge_hw_status status = VXGE_HW_OK;

        if (VXGE_HW_OK == __vxge_hw_device_is_privilaged(hldev->host_type,
                                hldev->func_id)) {
                /* Validate the pci-e link width and speed */
                status = __vxge_hw_verify_pci_e_info(hldev);
                if (status != VXGE_HW_OK)
                        goto exit;
        }

exit:
        return status;
}

/*
 * __vxge_hw_vpath_fw_ver_get - Get the fw version
 * Returns FW Version
 */
static enum vxge_hw_status
__vxge_hw_vpath_fw_ver_get(struct __vxge_hw_virtualpath *vpath,
                           struct vxge_hw_device_hw_info *hw_info)
{
        struct vxge_hw_device_version *fw_version = &hw_info->fw_version;
        struct vxge_hw_device_date *fw_date = &hw_info->fw_date;
        struct vxge_hw_device_version *flash_version = &hw_info->flash_version;
        struct vxge_hw_device_date *flash_date = &hw_info->flash_date;
        u64 data0, data1 = 0, steer_ctrl = 0;
        enum vxge_hw_status status;

        status = vxge_hw_vpath_fw_api(vpath,
                        VXGE_HW_RTS_ACCESS_STEER_CTRL_ACTION_READ_ENTRY,
                        VXGE_HW_RTS_ACCESS_STEER_CTRL_DATA_STRUCT_SEL_FW_MEMO,
                        0, &data0, &data1, &steer_ctrl);
        if (status != VXGE_HW_OK)
                goto exit;

        fw_date->day =
            (u32) VXGE_HW_RTS_ACCESS_STEER_DATA0_GET_FW_VER_DAY(data0);
        fw_date->month =
            (u32) VXGE_HW_RTS_ACCESS_STEER_DATA0_GET_FW_VER_MONTH(data0);
        fw_date->year =
            (u32) VXGE_HW_RTS_ACCESS_STEER_DATA0_GET_FW_VER_YEAR(data0);

        snprintf(fw_date->date, VXGE_HW_FW_STRLEN, "%2.2d/%2.2d/%4.4d",
                 fw_date->month, fw_date->day, fw_date->year);

        fw_version->major =
            (u32) VXGE_HW_RTS_ACCESS_STEER_DATA0_GET_FW_VER_MAJOR(data0);
        fw_version->minor =
            (u32) VXGE_HW_RTS_ACCESS_STEER_DATA0_GET_FW_VER_MINOR(data0);
        fw_version->build =
            (u32) VXGE_HW_RTS_ACCESS_STEER_DATA0_GET_FW_VER_BUILD(data0);

        snprintf(fw_version->version, VXGE_HW_FW_STRLEN, "%d.%d.%d",
                 fw_version->major, fw_version->minor, fw_version->build);

        flash_date->day =
            (u32) VXGE_HW_RTS_ACCESS_STEER_DATA1_GET_FLASH_VER_DAY(data1);
        flash_date->month =
            (u32) VXGE_HW_RTS_ACCESS_STEER_DATA1_GET_FLASH_VER_MONTH(data1);
        flash_date->year =
            (u32) VXGE_HW_RTS_ACCESS_STEER_DATA1_GET_FLASH_VER_YEAR(data1);

        snprintf(flash_date->date, VXGE_HW_FW_STRLEN, "%2.2d/%2.2d/%4.4d",
                 flash_date->month, flash_date->day, flash_date->year);

        flash_version->major =
            (u32) VXGE_HW_RTS_ACCESS_STEER_DATA1_GET_FLASH_VER_MAJOR(data1);
        flash_version->minor =
            (u32) VXGE_HW_RTS_ACCESS_STEER_DATA1_GET_FLASH_VER_MINOR(data1);
        flash_version->build =
            (u32) VXGE_HW_RTS_ACCESS_STEER_DATA1_GET_FLASH_VER_BUILD(data1);

        snprintf(flash_version->version, VXGE_HW_FW_STRLEN, "%d.%d.%d",
                 flash_version->major, flash_version->minor,
                 flash_version->build);

exit:
        return status;
}

/*
 * __vxge_hw_vpath_card_info_get - Get the serial numbers,
 * part number and product description.
 */
static enum vxge_hw_status
__vxge_hw_vpath_card_info_get(struct __vxge_hw_virtualpath *vpath,
                              struct vxge_hw_device_hw_info *hw_info)
{
        enum vxge_hw_status status;
        u64 data0, data1 = 0, steer_ctrl = 0;
        u8 *serial_number = hw_info->serial_number;
        u8 *part_number = hw_info->part_number;
        u8 *product_desc = hw_info->product_desc;
        u32 i, j = 0;

        data0 = VXGE_HW_RTS_ACCESS_STEER_DATA0_MEMO_ITEM_SERIAL_NUMBER;

        status = vxge_hw_vpath_fw_api(vpath,
                        VXGE_HW_RTS_ACCESS_STEER_CTRL_ACTION_READ_MEMO_ENTRY,
                        VXGE_HW_RTS_ACCESS_STEER_CTRL_DATA_STRUCT_SEL_FW_MEMO,
                        0, &data0, &data1, &steer_ctrl);
        if (status != VXGE_HW_OK)
                return status;

        ((u64 *)serial_number)[0] = be64_to_cpu(data0);
        ((u64 *)serial_number)[1] = be64_to_cpu(data1);

        data0 = VXGE_HW_RTS_ACCESS_STEER_DATA0_MEMO_ITEM_PART_NUMBER;
        data1 = steer_ctrl = 0;

        status = vxge_hw_vpath_fw_api(vpath,
                        VXGE_HW_RTS_ACCESS_STEER_CTRL_ACTION_READ_MEMO_ENTRY,
                        VXGE_HW_RTS_ACCESS_STEER_CTRL_DATA_STRUCT_SEL_FW_MEMO,
                        0, &data0, &data1, &steer_ctrl);
        if (status != VXGE_HW_OK)
                return status;

        ((u64 *)part_number)[0] = be64_to_cpu(data0);
        ((u64 *)part_number)[1] = be64_to_cpu(data1);

        for (i = VXGE_HW_RTS_ACCESS_STEER_DATA0_MEMO_ITEM_DESC_0;
             i <= VXGE_HW_RTS_ACCESS_STEER_DATA0_MEMO_ITEM_DESC_3; i++) {
                data0 = i;
                data1 = steer_ctrl = 0;

                status = vxge_hw_vpath_fw_api(vpath,
                        VXGE_HW_RTS_ACCESS_STEER_CTRL_ACTION_READ_MEMO_ENTRY,
                        VXGE_HW_RTS_ACCESS_STEER_CTRL_DATA_STRUCT_SEL_FW_MEMO,
                        0, &data0, &data1, &steer_ctrl);
                if (status != VXGE_HW_OK)
                        return status;

                ((u64 *)product_desc)[j++] = be64_to_cpu(data0);
                ((u64 *)product_desc)[j++] = be64_to_cpu(data1);
        }

        return status;
}

/*
 * __vxge_hw_vpath_pci_func_mode_get - Get the pci mode
 * Returns pci function mode
 */
static enum vxge_hw_status
__vxge_hw_vpath_pci_func_mode_get(struct __vxge_hw_virtualpath *vpath,
                                  struct vxge_hw_device_hw_info *hw_info)
{
        u64 data0, data1 = 0, steer_ctrl = 0;
        enum vxge_hw_status status;

        data0 = 0;

        status = vxge_hw_vpath_fw_api(vpath,
                        VXGE_HW_FW_API_GET_FUNC_MODE,
                        VXGE_HW_RTS_ACCESS_STEER_CTRL_DATA_STRUCT_SEL_FW_MEMO,
                        0, &data0, &data1, &steer_ctrl);
        if (status != VXGE_HW_OK)
                return status;

        hw_info->function_mode = VXGE_HW_GET_FUNC_MODE_VAL(data0);
        return status;
}

/*
 * __vxge_hw_vpath_addr_get - Get the hw address entry for this vpath
 *               from MAC address table.
 */
static enum vxge_hw_status
__vxge_hw_vpath_addr_get(struct __vxge_hw_virtualpath *vpath,
                         u8 *macaddr, u8 *macaddr_mask)
{
        u64 action = VXGE_HW_RTS_ACCESS_STEER_CTRL_ACTION_LIST_FIRST_ENTRY,
            data0 = 0, data1 = 0, steer_ctrl = 0;
        enum vxge_hw_status status;
        int i;

        do {
                status = vxge_hw_vpath_fw_api(vpath, action,
                        VXGE_HW_RTS_ACCESS_STEER_CTRL_DATA_STRUCT_SEL_DA,
                        0, &data0, &data1, &steer_ctrl);
                if (status != VXGE_HW_OK)
                        goto exit;

                data0 = VXGE_HW_RTS_ACCESS_STEER_DATA0_GET_DA_MAC_ADDR(data0);
                data1 = VXGE_HW_RTS_ACCESS_STEER_DATA1_GET_DA_MAC_ADDR_MASK(
                                                                        data1);

                for (i = ETH_ALEN; i > 0; i--) {
                        macaddr[i - 1] = (u8) (data0 & 0xFF);
                        data0 >>= 8;

                        macaddr_mask[i - 1] = (u8) (data1 & 0xFF);
                        data1 >>= 8;
                }

                action = VXGE_HW_RTS_ACCESS_STEER_CTRL_ACTION_LIST_NEXT_ENTRY;
                data0 = 0, data1 = 0, steer_ctrl = 0;

        } while (!is_valid_ether_addr(macaddr));
exit:
        return status;
}

/**
 * vxge_hw_device_hw_info_get - Get the hw information
 * Returns the vpath mask that has the bits set for each vpath allocated
 * for the driver, FW version information, and the first mac address for
 * each vpath
 */
enum vxge_hw_status
vxge_hw_device_hw_info_get(void __iomem *bar0,
                           struct vxge_hw_device_hw_info *hw_info)
{
        u32 i;

        u64 val64;
        struct vxge_hw_toc_reg __iomem *toc;
        struct vxge_hw_mrpcim_reg __iomem *mrpcim_reg;
        struct vxge_hw_common_reg __iomem *common_reg;
        struct vxge_hw_vpmgmt_reg __iomem *vpmgmt_reg;
        enum vxge_hw_status status;
        struct __vxge_hw_virtualpath vpath;

        memset(hw_info, 0, sizeof(struct vxge_hw_device_hw_info));

        toc = __vxge_hw_device_toc_get(bar0);
        if (toc == NULL) {
                status = VXGE_HW_ERR_CRITICAL;
                goto exit;
        }

        val64 = readq(&toc->toc_common_pointer);
        common_reg = bar0 + val64;

        status = __vxge_hw_device_vpath_reset_in_prog_check(
                (u64 __iomem *)&common_reg->vpath_rst_in_prog);
        if (status != VXGE_HW_OK)
                goto exit;

        hw_info->vpath_mask = readq(&common_reg->vpath_assignments);

        val64 = readq(&common_reg->host_type_assignments);

        hw_info->host_type =
           (u32)VXGE_HW_HOST_TYPE_ASSIGNMENTS_GET_HOST_TYPE_ASSIGNMENTS(val64);

        for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
                if (!((hw_info->vpath_mask) & vxge_mBIT(i)))
                        continue;

                val64 = readq(&toc->toc_vpmgmt_pointer[i]);

                vpmgmt_reg = bar0 + val64;

                hw_info->func_id = __vxge_hw_vpath_func_id_get(vpmgmt_reg);
                if (__vxge_hw_device_access_rights_get(hw_info->host_type,
                        hw_info->func_id) &
                        VXGE_HW_DEVICE_ACCESS_RIGHT_MRPCIM) {

                        val64 = readq(&toc->toc_mrpcim_pointer);

                        mrpcim_reg = bar0 + val64;

                        writeq(0, &mrpcim_reg->xgmac_gen_fw_memo_mask);
                        wmb();
                }

                val64 = readq(&toc->toc_vpath_pointer[i]);

                spin_lock_init(&vpath.lock);
                vpath.vp_reg = bar0 + val64;
                vpath.vp_open = VXGE_HW_VP_NOT_OPEN;

                status = __vxge_hw_vpath_pci_func_mode_get(&vpath, hw_info);
                if (status != VXGE_HW_OK)
                        goto exit;

                status = __vxge_hw_vpath_fw_ver_get(&vpath, hw_info);
                if (status != VXGE_HW_OK)
                        goto exit;

                status = __vxge_hw_vpath_card_info_get(&vpath, hw_info);
                if (status != VXGE_HW_OK)
                        goto exit;

                break;
        }

        for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
                if (!((hw_info->vpath_mask) & vxge_mBIT(i)))
                        continue;

                val64 = readq(&toc->toc_vpath_pointer[i]);
                vpath.vp_reg = bar0 + val64;
                vpath.vp_open = VXGE_HW_VP_NOT_OPEN;

                status =  __vxge_hw_vpath_addr_get(&vpath,
                                hw_info->mac_addrs[i],
                                hw_info->mac_addr_masks[i]);
                if (status != VXGE_HW_OK)
                        goto exit;
        }
exit:
        return status;
}

/*
 * __vxge_hw_blockpool_destroy - Deallocates the block pool
 */
static void __vxge_hw_blockpool_destroy(struct __vxge_hw_blockpool *blockpool)
{
        struct __vxge_hw_device *hldev;
        struct list_head *p, *n;
        u16 ret;

        if (blockpool == NULL) {
                ret = 1;
                goto exit;
        }

        hldev = blockpool->hldev;

        list_for_each_safe(p, n, &blockpool->free_block_list) {
                pci_unmap_single(hldev->pdev,
                        ((struct __vxge_hw_blockpool_entry *)p)->dma_addr,
                        ((struct __vxge_hw_blockpool_entry *)p)->length,
                        PCI_DMA_BIDIRECTIONAL);

                vxge_os_dma_free(hldev->pdev,
                        ((struct __vxge_hw_blockpool_entry *)p)->memblock,
                        &((struct __vxge_hw_blockpool_entry *)p)->acc_handle);

                list_del(&((struct __vxge_hw_blockpool_entry *)p)->item);
                kfree(p);
                blockpool->pool_size--;
        }

        list_for_each_safe(p, n, &blockpool->free_entry_list) {
                list_del(&((struct __vxge_hw_blockpool_entry *)p)->item);
                kfree((void *)p);
        }
        ret = 0;
exit:
        return;
}

/*
 * __vxge_hw_blockpool_create - Create block pool
 */
static enum vxge_hw_status
__vxge_hw_blockpool_create(struct __vxge_hw_device *hldev,
                           struct __vxge_hw_blockpool *blockpool,
                           u32 pool_size,
                           u32 pool_max)
{
        u32 i;
        struct __vxge_hw_blockpool_entry *entry = NULL;
        void *memblock;
        dma_addr_t dma_addr;
        struct pci_dev *dma_handle;
        struct pci_dev *acc_handle;
        enum vxge_hw_status status = VXGE_HW_OK;

        if (blockpool == NULL) {
                status = VXGE_HW_FAIL;
                goto blockpool_create_exit;
        }

        blockpool->hldev = hldev;
        blockpool->block_size = VXGE_HW_BLOCK_SIZE;
        blockpool->pool_size = 0;
        blockpool->pool_max = pool_max;
        blockpool->req_out = 0;

        INIT_LIST_HEAD(&blockpool->free_block_list);
        INIT_LIST_HEAD(&blockpool->free_entry_list);

        for (i = 0; i < pool_size + pool_max; i++) {
                entry = kzalloc(sizeof(struct __vxge_hw_blockpool_entry),
                                GFP_KERNEL);
                if (entry == NULL) {
                        __vxge_hw_blockpool_destroy(blockpool);
                        status = VXGE_HW_ERR_OUT_OF_MEMORY;
                        goto blockpool_create_exit;
                }
                list_add(&entry->item, &blockpool->free_entry_list);
        }

        for (i = 0; i < pool_size; i++) {
                memblock = vxge_os_dma_malloc(
                                hldev->pdev,
                                VXGE_HW_BLOCK_SIZE,
                                &dma_handle,
                                &acc_handle);
                if (memblock == NULL) {
                        __vxge_hw_blockpool_destroy(blockpool);
                        status = VXGE_HW_ERR_OUT_OF_MEMORY;
                        goto blockpool_create_exit;
                }

                dma_addr = pci_map_single(hldev->pdev, memblock,
                                VXGE_HW_BLOCK_SIZE, PCI_DMA_BIDIRECTIONAL);
                if (unlikely(pci_dma_mapping_error(hldev->pdev,
                                dma_addr))) {
                        vxge_os_dma_free(hldev->pdev, memblock, &acc_handle);
                        __vxge_hw_blockpool_destroy(blockpool);
                        status = VXGE_HW_ERR_OUT_OF_MEMORY;
                        goto blockpool_create_exit;
                }

                if (!list_empty(&blockpool->free_entry_list))
                        entry = (struct __vxge_hw_blockpool_entry *)
                                list_first_entry(&blockpool->free_entry_list,
                                        struct __vxge_hw_blockpool_entry,
                                        item);

                if (entry == NULL)
                        entry =
                            kzalloc(sizeof(struct __vxge_hw_blockpool_entry),
                                        GFP_KERNEL);
                if (entry != NULL) {
                        list_del(&entry->item);
                        entry->length = VXGE_HW_BLOCK_SIZE;
                        entry->memblock = memblock;
                        entry->dma_addr = dma_addr;
                        entry->acc_handle = acc_handle;
                        entry->dma_handle = dma_handle;
                        list_add(&entry->item,
                                          &blockpool->free_block_list);
                        blockpool->pool_size++;
                } else {
                        __vxge_hw_blockpool_destroy(blockpool);
                        status = VXGE_HW_ERR_OUT_OF_MEMORY;
                        goto blockpool_create_exit;
                }
        }

blockpool_create_exit:
        return status;
}

/*
 * __vxge_hw_device_fifo_config_check - Check fifo configuration.
 * Check the fifo configuration
 */
static enum vxge_hw_status
__vxge_hw_device_fifo_config_check(struct vxge_hw_fifo_config *fifo_config)
{
        if ((fifo_config->fifo_blocks < VXGE_HW_MIN_FIFO_BLOCKS) ||
            (fifo_config->fifo_blocks > VXGE_HW_MAX_FIFO_BLOCKS))
                return VXGE_HW_BADCFG_FIFO_BLOCKS;

        return VXGE_HW_OK;
}

/*
 * __vxge_hw_device_vpath_config_check - Check vpath configuration.
 * Check the vpath configuration
 */
static enum vxge_hw_status
__vxge_hw_device_vpath_config_check(struct vxge_hw_vp_config *vp_config)
{
        enum vxge_hw_status status;

        if ((vp_config->min_bandwidth < VXGE_HW_VPATH_BANDWIDTH_MIN) ||
            (vp_config->min_bandwidth > VXGE_HW_VPATH_BANDWIDTH_MAX))
                return VXGE_HW_BADCFG_VPATH_MIN_BANDWIDTH;

        status = __vxge_hw_device_fifo_config_check(&vp_config->fifo);
        if (status != VXGE_HW_OK)
                return status;

        if ((vp_config->mtu != VXGE_HW_VPATH_USE_FLASH_DEFAULT_INITIAL_MTU) &&
                ((vp_config->mtu < VXGE_HW_VPATH_MIN_INITIAL_MTU) ||
                (vp_config->mtu > VXGE_HW_VPATH_MAX_INITIAL_MTU)))
                return VXGE_HW_BADCFG_VPATH_MTU;

        if ((vp_config->rpa_strip_vlan_tag !=
                VXGE_HW_VPATH_RPA_STRIP_VLAN_TAG_USE_FLASH_DEFAULT) &&
                (vp_config->rpa_strip_vlan_tag !=
                VXGE_HW_VPATH_RPA_STRIP_VLAN_TAG_ENABLE) &&
                (vp_config->rpa_strip_vlan_tag !=
                VXGE_HW_VPATH_RPA_STRIP_VLAN_TAG_DISABLE))
                return VXGE_HW_BADCFG_VPATH_RPA_STRIP_VLAN_TAG;

        return VXGE_HW_OK;
}

/*
 * __vxge_hw_device_config_check - Check device configuration.
 * Check the device configuration
 */
static enum vxge_hw_status
__vxge_hw_device_config_check(struct vxge_hw_device_config *new_config)
{
        u32 i;
        enum vxge_hw_status status;

        if ((new_config->intr_mode != VXGE_HW_INTR_MODE_IRQLINE) &&
            (new_config->intr_mode != VXGE_HW_INTR_MODE_MSIX) &&
            (new_config->intr_mode != VXGE_HW_INTR_MODE_MSIX_ONE_SHOT) &&
            (new_config->intr_mode != VXGE_HW_INTR_MODE_DEF))
                return VXGE_HW_BADCFG_INTR_MODE;

        if ((new_config->rts_mac_en != VXGE_HW_RTS_MAC_DISABLE) &&
            (new_config->rts_mac_en != VXGE_HW_RTS_MAC_ENABLE))
                return VXGE_HW_BADCFG_RTS_MAC_EN;

        for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
                status = __vxge_hw_device_vpath_config_check(
                                &new_config->vp_config[i]);
                if (status != VXGE_HW_OK)
                        return status;
        }

        return VXGE_HW_OK;
}

/*
 * vxge_hw_device_initialize - Initialize Titan device.
 * Initialize Titan device. Note that all the arguments of this public API
 * are 'IN', including @hldev. Driver cooperates with
 * OS to find new Titan device, locate its PCI and memory spaces.
 *
 * When done, the driver allocates sizeof(struct __vxge_hw_device) bytes for HW
 * to enable the latter to perform Titan hardware initialization.
 */
enum vxge_hw_status
vxge_hw_device_initialize(
        struct __vxge_hw_device **devh,
        struct vxge_hw_device_attr *attr,
        struct vxge_hw_device_config *device_config)
{
        u32 i;
        u32 nblocks = 0;
        struct __vxge_hw_device *hldev = NULL;
        enum vxge_hw_status status = VXGE_HW_OK;

        status = __vxge_hw_device_config_check(device_config);
        if (status != VXGE_HW_OK)
                goto exit;

        hldev = vzalloc(sizeof(struct __vxge_hw_device));
        if (hldev == NULL) {
                status = VXGE_HW_ERR_OUT_OF_MEMORY;
                goto exit;
        }

        hldev->magic = VXGE_HW_DEVICE_MAGIC;

        vxge_hw_device_debug_set(hldev, VXGE_ERR, VXGE_COMPONENT_ALL);

        /* apply config */
        memcpy(&hldev->config, device_config,
                sizeof(struct vxge_hw_device_config));

        hldev->bar0 = attr->bar0;
        hldev->pdev = attr->pdev;

        hldev->uld_callbacks = attr->uld_callbacks;

        __vxge_hw_device_pci_e_init(hldev);

        status = __vxge_hw_device_reg_addr_get(hldev);
        if (status != VXGE_HW_OK) {
                vfree(hldev);
                goto exit;
        }

        __vxge_hw_device_host_info_get(hldev);

        /* Incrementing for stats blocks */
        nblocks++;

        for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
                if (!(hldev->vpath_assignments & vxge_mBIT(i)))
                        continue;

                if (device_config->vp_config[i].ring.enable ==
                        VXGE_HW_RING_ENABLE)
                        nblocks += device_config->vp_config[i].ring.ring_blocks;

                if (device_config->vp_config[i].fifo.enable ==
                        VXGE_HW_FIFO_ENABLE)
                        nblocks += device_config->vp_config[i].fifo.fifo_blocks;
                nblocks++;
        }

        if (__vxge_hw_blockpool_create(hldev,
                &hldev->block_pool,
                device_config->dma_blockpool_initial + nblocks,
                device_config->dma_blockpool_max + nblocks) != VXGE_HW_OK) {

                vxge_hw_device_terminate(hldev);
                status = VXGE_HW_ERR_OUT_OF_MEMORY;
                goto exit;
        }

        status = __vxge_hw_device_initialize(hldev);
        if (status != VXGE_HW_OK) {
                vxge_hw_device_terminate(hldev);
                goto exit;
        }

        *devh = hldev;
exit:
        return status;
}

/*
 * vxge_hw_device_terminate - Terminate Titan device.
 * Terminate HW device.
 */
void
vxge_hw_device_terminate(struct __vxge_hw_device *hldev)
{
        vxge_assert(hldev->magic == VXGE_HW_DEVICE_MAGIC);

        hldev->magic = VXGE_HW_DEVICE_DEAD;
        __vxge_hw_blockpool_destroy(&hldev->block_pool);
        vfree(hldev);
}

/*
 * __vxge_hw_vpath_stats_access - Get the statistics from the given location
 *                           and offset and perform an operation
 */
static enum vxge_hw_status
__vxge_hw_vpath_stats_access(struct __vxge_hw_virtualpath *vpath,
                             u32 operation, u32 offset, u64 *stat)
{
        u64 val64;
        enum vxge_hw_status status = VXGE_HW_OK;
        struct vxge_hw_vpath_reg __iomem *vp_reg;

        if (vpath->vp_open == VXGE_HW_VP_NOT_OPEN) {
                status = VXGE_HW_ERR_VPATH_NOT_OPEN;
                goto vpath_stats_access_exit;
        }

        vp_reg = vpath->vp_reg;

        val64 =  VXGE_HW_XMAC_STATS_ACCESS_CMD_OP(operation) |
                 VXGE_HW_XMAC_STATS_ACCESS_CMD_STROBE |
                 VXGE_HW_XMAC_STATS_ACCESS_CMD_OFFSET_SEL(offset);

        status = __vxge_hw_pio_mem_write64(val64,
                                &vp_reg->xmac_stats_access_cmd,
                                VXGE_HW_XMAC_STATS_ACCESS_CMD_STROBE,
                                vpath->hldev->config.device_poll_millis);
        if ((status == VXGE_HW_OK) && (operation == VXGE_HW_STATS_OP_READ))
                *stat = readq(&vp_reg->xmac_stats_access_data);
        else
                *stat = 0;

vpath_stats_access_exit:
        return status;
}

/*
 * __vxge_hw_vpath_xmac_tx_stats_get - Get the TX Statistics of a vpath
 */
static 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)
{
        u64 *val64;
        int i;
        u32 offset = VXGE_HW_STATS_VPATH_TX_OFFSET;
        enum vxge_hw_status status = VXGE_HW_OK;

        val64 = (u64 *)vpath_tx_stats;

        if (vpath->vp_open == VXGE_HW_VP_NOT_OPEN) {
                status = VXGE_HW_ERR_VPATH_NOT_OPEN;
                goto exit;
        }

        for (i = 0; i < sizeof(struct vxge_hw_xmac_vpath_tx_stats) / 8; i++) {
                status = __vxge_hw_vpath_stats_access(vpath,
                                        VXGE_HW_STATS_OP_READ,
                                        offset, val64);
                if (status != VXGE_HW_OK)
                        goto exit;
                offset++;
                val64++;
        }
exit:
        return status;
}

/*
 * __vxge_hw_vpath_xmac_rx_stats_get - Get the RX Statistics of a vpath
 */
static 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)
{
        u64 *val64;
        enum vxge_hw_status status = VXGE_HW_OK;
        int i;
        u32 offset = VXGE_HW_STATS_VPATH_RX_OFFSET;
        val64 = (u64 *) vpath_rx_stats;

        if (vpath->vp_open == VXGE_HW_VP_NOT_OPEN) {
                status = VXGE_HW_ERR_VPATH_NOT_OPEN;
                goto exit;
        }
        for (i = 0; i < sizeof(struct vxge_hw_xmac_vpath_rx_stats) / 8; i++) {
                status = __vxge_hw_vpath_stats_access(vpath,
                                        VXGE_HW_STATS_OP_READ,
                                        offset >> 3, val64);
                if (status != VXGE_HW_OK)
                        goto exit;

                offset += 8;
                val64++;
        }
exit:
        return status;
}

/*
 * __vxge_hw_vpath_stats_get - Get the vpath hw statistics.
 */
static enum vxge_hw_status
__vxge_hw_vpath_stats_get(struct __vxge_hw_virtualpath *vpath,
                          struct vxge_hw_vpath_stats_hw_info *hw_stats)
{
        u64 val64;
        enum vxge_hw_status status = VXGE_HW_OK;
        struct vxge_hw_vpath_reg __iomem *vp_reg;

        if (vpath->vp_open == VXGE_HW_VP_NOT_OPEN) {
                status = VXGE_HW_ERR_VPATH_NOT_OPEN;
                goto exit;
        }
        vp_reg = vpath->vp_reg;

        val64 = readq(&vp_reg->vpath_debug_stats0);
        hw_stats->ini_num_mwr_sent =
                (u32)VXGE_HW_VPATH_DEBUG_STATS0_GET_INI_NUM_MWR_SENT(val64);

        val64 = readq(&vp_reg->vpath_debug_stats1);
        hw_stats->ini_num_mrd_sent =
                (u32)VXGE_HW_VPATH_DEBUG_STATS1_GET_INI_NUM_MRD_SENT(val64);

        val64 = readq(&vp_reg->vpath_debug_stats2);
        hw_stats->ini_num_cpl_rcvd =
                (u32)VXGE_HW_VPATH_DEBUG_STATS2_GET_INI_NUM_CPL_RCVD(val64);

        val64 = readq(&vp_reg->vpath_debug_stats3);
        hw_stats->ini_num_mwr_byte_sent =
                VXGE_HW_VPATH_DEBUG_STATS3_GET_INI_NUM_MWR_BYTE_SENT(val64);

        val64 = readq(&vp_reg->vpath_debug_stats4);
        hw_stats->ini_num_cpl_byte_rcvd =
                VXGE_HW_VPATH_DEBUG_STATS4_GET_INI_NUM_CPL_BYTE_RCVD(val64);

        val64 = readq(&vp_reg->vpath_debug_stats5);
        hw_stats->wrcrdtarb_xoff =
                (u32)VXGE_HW_VPATH_DEBUG_STATS5_GET_WRCRDTARB_XOFF(val64);

        val64 = readq(&vp_reg->vpath_debug_stats6);
        hw_stats->rdcrdtarb_xoff =
                (u32)VXGE_HW_VPATH_DEBUG_STATS6_GET_RDCRDTARB_XOFF(val64);

        val64 = readq(&vp_reg->vpath_genstats_count01);
        hw_stats->vpath_genstats_count0 =
        (u32)VXGE_HW_VPATH_GENSTATS_COUNT01_GET_PPIF_VPATH_GENSTATS_COUNT0(
                val64);

        val64 = readq(&vp_reg->vpath_genstats_count01);
        hw_stats->vpath_genstats_count1 =
        (u32)VXGE_HW_VPATH_GENSTATS_COUNT01_GET_PPIF_VPATH_GENSTATS_COUNT1(
                val64);

        val64 = readq(&vp_reg->vpath_genstats_count23);
        hw_stats->vpath_genstats_count2 =
        (u32)VXGE_HW_VPATH_GENSTATS_COUNT23_GET_PPIF_VPATH_GENSTATS_COUNT2(
                val64);

        val64 = readq(&vp_reg->vpath_genstats_count01);
        hw_stats->vpath_genstats_count3 =
        (u32)VXGE_HW_VPATH_GENSTATS_COUNT23_GET_PPIF_VPATH_GENSTATS_COUNT3(
                val64);

        val64 = readq(&vp_reg->vpath_genstats_count4);
        hw_stats->vpath_genstats_count4 =
        (u32)VXGE_HW_VPATH_GENSTATS_COUNT4_GET_PPIF_VPATH_GENSTATS_COUNT4(
                val64);

        val64 = readq(&vp_reg->vpath_genstats_count5);
        hw_stats->vpath_genstats_count5 =
        (u32)VXGE_HW_VPATH_GENSTATS_COUNT5_GET_PPIF_VPATH_GENSTATS_COUNT5(
                val64);

        status = __vxge_hw_vpath_xmac_tx_stats_get(vpath, &hw_stats->tx_stats);
        if (status != VXGE_HW_OK)
                goto exit;

        status = __vxge_hw_vpath_xmac_rx_stats_get(vpath, &hw_stats->rx_stats);
        if (status != VXGE_HW_OK)
                goto exit;

        VXGE_HW_VPATH_STATS_PIO_READ(
                VXGE_HW_STATS_VPATH_PROG_EVENT_VNUM0_OFFSET);

        hw_stats->prog_event_vnum0 =
                        (u32)VXGE_HW_STATS_GET_VPATH_PROG_EVENT_VNUM0(val64);

        hw_stats->prog_event_vnum1 =
                        (u32)VXGE_HW_STATS_GET_VPATH_PROG_EVENT_VNUM1(val64);

        VXGE_HW_VPATH_STATS_PIO_READ(
                VXGE_HW_STATS_VPATH_PROG_EVENT_VNUM2_OFFSET);

        hw_stats->prog_event_vnum2 =
                        (u32)VXGE_HW_STATS_GET_VPATH_PROG_EVENT_VNUM2(val64);

        hw_stats->prog_event_vnum3 =
                        (u32)VXGE_HW_STATS_GET_VPATH_PROG_EVENT_VNUM3(val64);

        val64 = readq(&vp_reg->rx_multi_cast_stats);
        hw_stats->rx_multi_cast_frame_discard =
                (u16)VXGE_HW_RX_MULTI_CAST_STATS_GET_FRAME_DISCARD(val64);

        val64 = readq(&vp_reg->rx_frm_transferred);
        hw_stats->rx_frm_transferred =
                (u32)VXGE_HW_RX_FRM_TRANSFERRED_GET_RX_FRM_TRANSFERRED(val64);

        val64 = readq(&vp_reg->rxd_returned);
        hw_stats->rxd_returned =
                (u16)VXGE_HW_RXD_RETURNED_GET_RXD_RETURNED(val64);

        val64 = readq(&vp_reg->dbg_stats_rx_mpa);
        hw_stats->rx_mpa_len_fail_frms =
                (u16)VXGE_HW_DBG_STATS_GET_RX_MPA_LEN_FAIL_FRMS(val64);
        hw_stats->rx_mpa_mrk_fail_frms =
                (u16)VXGE_HW_DBG_STATS_GET_RX_MPA_MRK_FAIL_FRMS(val64);
        hw_stats->rx_mpa_crc_fail_frms =
                (u16)VXGE_HW_DBG_STATS_GET_RX_MPA_CRC_FAIL_FRMS(val64);

        val64 = readq(&vp_reg->dbg_stats_rx_fau);
        hw_stats->rx_permitted_frms =
                (u16)VXGE_HW_DBG_STATS_GET_RX_FAU_RX_PERMITTED_FRMS(val64);
        hw_stats->rx_vp_reset_discarded_frms =
        (u16)VXGE_HW_DBG_STATS_GET_RX_FAU_RX_VP_RESET_DISCARDED_FRMS(val64);
        hw_stats->rx_wol_frms =
                (u16)VXGE_HW_DBG_STATS_GET_RX_FAU_RX_WOL_FRMS(val64);

        val64 = readq(&vp_reg->tx_vp_reset_discarded_frms);
        hw_stats->tx_vp_reset_discarded_frms =
        (u16)VXGE_HW_TX_VP_RESET_DISCARDED_FRMS_GET_TX_VP_RESET_DISCARDED_FRMS(
                val64);
exit:
        return status;
}

/*
 * vxge_hw_device_stats_get - Get the device hw statistics.
 * Returns the vpath h/w stats for the device.
 */
enum vxge_hw_status
vxge_hw_device_stats_get(struct __vxge_hw_device *hldev,
                        struct vxge_hw_device_stats_hw_info *hw_stats)
{
        u32 i;
        enum vxge_hw_status status = VXGE_HW_OK;

        for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
                if (!(hldev->vpaths_deployed & vxge_mBIT(i)) ||
                        (hldev->virtual_paths[i].vp_open ==
                                VXGE_HW_VP_NOT_OPEN))
                        continue;

                memcpy(hldev->virtual_paths[i].hw_stats_sav,
                                hldev->virtual_paths[i].hw_stats,
                                sizeof(struct vxge_hw_vpath_stats_hw_info));

                status = __vxge_hw_vpath_stats_get(
                        &hldev->virtual_paths[i],
                        hldev->virtual_paths[i].hw_stats);
        }

        memcpy(hw_stats, &hldev->stats.hw_dev_info_stats,
                        sizeof(struct vxge_hw_device_stats_hw_info));

        return status;
}

/*
 * vxge_hw_driver_stats_get - Get the device sw statistics.
 * Returns the vpath s/w stats for the device.
 */
enum vxge_hw_status vxge_hw_driver_stats_get(
                        struct __vxge_hw_device *hldev,
                        struct vxge_hw_device_stats_sw_info *sw_stats)
{
        enum vxge_hw_status status = VXGE_HW_OK;

        memcpy(sw_stats, &hldev->stats.sw_dev_info_stats,
                sizeof(struct vxge_hw_device_stats_sw_info));

        return status;
}

/*
 * vxge_hw_mrpcim_stats_access - Access the statistics from the given location
 *                           and offset and perform an operation
 * Get the statistics from the given location and offset.
 */
enum vxge_hw_status
vxge_hw_mrpcim_stats_access(struct __vxge_hw_device *hldev,
                            u32 operation, u32 location, u32 offset, u64 *stat)
{
        u64 val64;
        enum vxge_hw_status status = VXGE_HW_OK;

        status = __vxge_hw_device_is_privilaged(hldev->host_type,
                        hldev->func_id);
        if (status != VXGE_HW_OK)
                goto exit;

        val64 = VXGE_HW_XMAC_STATS_SYS_CMD_OP(operation) |
                VXGE_HW_XMAC_STATS_SYS_CMD_STROBE |
                VXGE_HW_XMAC_STATS_SYS_CMD_LOC_SEL(location) |
                VXGE_HW_XMAC_STATS_SYS_CMD_OFFSET_SEL(offset);

        status = __vxge_hw_pio_mem_write64(val64,
                                &hldev->mrpcim_reg->xmac_stats_sys_cmd,
                                VXGE_HW_XMAC_STATS_SYS_CMD_STROBE,
                                hldev->config.device_poll_millis);

        if ((status == VXGE_HW_OK) && (operation == VXGE_HW_STATS_OP_READ))
                *stat = readq(&hldev->mrpcim_reg->xmac_stats_sys_data);
        else
                *stat = 0;
exit:
        return status;
}

/*
 * vxge_hw_device_xmac_aggr_stats_get - Get the Statistics on aggregate port
 * Get the Statistics on aggregate port
 */
static enum vxge_hw_status
vxge_hw_device_xmac_aggr_stats_get(struct __vxge_hw_device *hldev, u32 port,
                                   struct vxge_hw_xmac_aggr_stats *aggr_stats)
{
        u64 *val64;
        int i;
        u32 offset = VXGE_HW_STATS_AGGRn_OFFSET;
        enum vxge_hw_status status = VXGE_HW_OK;

        val64 = (u64 *)aggr_stats;

        status = __vxge_hw_device_is_privilaged(hldev->host_type,
                        hldev->func_id);
        if (status != VXGE_HW_OK)
                goto exit;

        for (i = 0; i < sizeof(struct vxge_hw_xmac_aggr_stats) / 8; i++) {
                status = vxge_hw_mrpcim_stats_access(hldev,
                                        VXGE_HW_STATS_OP_READ,
                                        VXGE_HW_STATS_LOC_AGGR,
                                        ((offset + (104 * port)) >> 3), val64);
                if (status != VXGE_HW_OK)
                        goto exit;

                offset += 8;
                val64++;
        }
exit:
        return status;
}

/*
 * vxge_hw_device_xmac_port_stats_get - Get the Statistics on a port
 * Get the Statistics on port
 */
static enum vxge_hw_status
vxge_hw_device_xmac_port_stats_get(struct __vxge_hw_device *hldev, u32 port,
                                   struct vxge_hw_xmac_port_stats *port_stats)
{
        u64 *val64;
        enum vxge_hw_status status = VXGE_HW_OK;
        int i;
        u32 offset = 0x0;
        val64 = (u64 *) port_stats;

        status = __vxge_hw_device_is_privilaged(hldev->host_type,
                        hldev->func_id);
        if (status != VXGE_HW_OK)
                goto exit;

        for (i = 0; i < sizeof(struct vxge_hw_xmac_port_stats) / 8; i++) {
                status = vxge_hw_mrpcim_stats_access(hldev,
                                        VXGE_HW_STATS_OP_READ,
                                        VXGE_HW_STATS_LOC_AGGR,
                                        ((offset + (608 * port)) >> 3), val64);
                if (status != VXGE_HW_OK)
                        goto exit;

                offset += 8;
                val64++;
        }

exit:
        return status;
}

/*
 * vxge_hw_device_xmac_stats_get - Get the XMAC Statistics
 * Get the XMAC Statistics
 */
enum vxge_hw_status
vxge_hw_device_xmac_stats_get(struct __vxge_hw_device *hldev,
                              struct vxge_hw_xmac_stats *xmac_stats)
{
        enum vxge_hw_status status = VXGE_HW_OK;
        u32 i;

        status = vxge_hw_device_xmac_aggr_stats_get(hldev,
                                        0, &xmac_stats->aggr_stats[0]);
        if (status != VXGE_HW_OK)
                goto exit;

        status = vxge_hw_device_xmac_aggr_stats_get(hldev,
                                1, &xmac_stats->aggr_stats[1]);
        if (status != VXGE_HW_OK)
                goto exit;

        for (i = 0; i <= VXGE_HW_MAC_MAX_MAC_PORT_ID; i++) {

                status = vxge_hw_device_xmac_port_stats_get(hldev,
                                        i, &xmac_stats->port_stats[i]);
                if (status != VXGE_HW_OK)
                        goto exit;
        }

        for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {

                if (!(hldev->vpaths_deployed & vxge_mBIT(i)))
                        continue;

                status = __vxge_hw_vpath_xmac_tx_stats_get(
                                        &hldev->virtual_paths[i],
                                        &xmac_stats->vpath_tx_stats[i]);
                if (status != VXGE_HW_OK)
                        goto exit;

                status = __vxge_hw_vpath_xmac_rx_stats_get(
                                        &hldev->virtual_paths[i],
                                        &xmac_stats->vpath_rx_stats[i]);
                if (status != VXGE_HW_OK)
                        goto exit;
        }
exit:
        return status;
}

/*
 * vxge_hw_device_debug_set - Set the debug module, level and timestamp
 * This routine is used to dynamically change the debug output
 */
void vxge_hw_device_debug_set(struct __vxge_hw_device *hldev,
                              enum vxge_debug_level level, u32 mask)
{
        if (hldev == NULL)
                return;

#if defined(VXGE_DEBUG_TRACE_MASK) || \
        defined(VXGE_DEBUG_ERR_MASK)
        hldev->debug_module_mask = mask;
        hldev->debug_level = level;
#endif

#if defined(VXGE_DEBUG_ERR_MASK)
        hldev->level_err = level & VXGE_ERR;
#endif

#if defined(VXGE_DEBUG_TRACE_MASK)
        hldev->level_trace = level & VXGE_TRACE;
#endif
}

/*
 * vxge_hw_device_error_level_get - Get the error level
 * This routine returns the current error level set
 */
u32 vxge_hw_device_error_level_get(struct __vxge_hw_device *hldev)
{
#if defined(VXGE_DEBUG_ERR_MASK)
        if (hldev == NULL)
                return VXGE_ERR;
        else
                return hldev->level_err;
#else
        return 0;
#endif
}

/*
 * vxge_hw_device_trace_level_get - Get the trace level
 * This routine returns the current trace level set
 */
u32 vxge_hw_device_trace_level_get(struct __vxge_hw_device *hldev)
{
#if defined(VXGE_DEBUG_TRACE_MASK)
        if (hldev == NULL)
                return VXGE_TRACE;
        else
                return hldev->level_trace;
#else
        return 0;
#endif
}

/*
 * vxge_hw_getpause_data -Pause frame frame generation and reception.
 * Returns the Pause frame generation and reception capability of the NIC.
 */
enum vxge_hw_status vxge_hw_device_getpause_data(struct __vxge_hw_device *hldev,
                                                 u32 port, u32 *tx, u32 *rx)
{
        u64 val64;
        enum vxge_hw_status status = VXGE_HW_OK;

        if ((hldev == NULL) || (hldev->magic != VXGE_HW_DEVICE_MAGIC)) {
                status = VXGE_HW_ERR_INVALID_DEVICE;
                goto exit;
        }

        if (port > VXGE_HW_MAC_MAX_MAC_PORT_ID) {
                status = VXGE_HW_ERR_INVALID_PORT;
                goto exit;
        }

        if (!(hldev->access_rights & VXGE_HW_DEVICE_ACCESS_RIGHT_MRPCIM)) {
                status = VXGE_HW_ERR_PRIVILAGED_OPEARATION;
                goto exit;
        }

        val64 = readq(&hldev->mrpcim_reg->rxmac_pause_cfg_port[port]);
        if (val64 & VXGE_HW_RXMAC_PAUSE_CFG_PORT_GEN_EN)
                *tx = 1;
        if (val64 & VXGE_HW_RXMAC_PAUSE_CFG_PORT_RCV_EN)
                *rx = 1;
exit:
        return status;
}

/*
 * vxge_hw_device_setpause_data -  set/reset pause frame generation.
 * It can be used to set or reset Pause frame generation or reception
 * support of the NIC.
 */
enum vxge_hw_status vxge_hw_device_setpause_data(struct __vxge_hw_device *hldev,
                                                 u32 port, u32 tx, u32 rx)
{
        u64 val64;
        enum vxge_hw_status status = VXGE_HW_OK;

        if ((hldev == NULL) || (hldev->magic != VXGE_HW_DEVICE_MAGIC)) {
                status = VXGE_HW_ERR_INVALID_DEVICE;
                goto exit;
        }

        if (port > VXGE_HW_MAC_MAX_MAC_PORT_ID) {
                status = VXGE_HW_ERR_INVALID_PORT;
                goto exit;
        }

        status = __vxge_hw_device_is_privilaged(hldev->host_type,
                        hldev->func_id);
        if (status != VXGE_HW_OK)
                goto exit;

        val64 = readq(&hldev->mrpcim_reg->rxmac_pause_cfg_port[port]);
        if (tx)
                val64 |= VXGE_HW_RXMAC_PAUSE_CFG_PORT_GEN_EN;
        else
                val64 &= ~VXGE_HW_RXMAC_PAUSE_CFG_PORT_GEN_EN;
        if (rx)
                val64 |= VXGE_HW_RXMAC_PAUSE_CFG_PORT_RCV_EN;
        else
                val64 &= ~VXGE_HW_RXMAC_PAUSE_CFG_PORT_RCV_EN;

        writeq(val64, &hldev->mrpcim_reg->rxmac_pause_cfg_port[port]);
exit:
        return status;
}

u16 vxge_hw_device_link_width_get(struct __vxge_hw_device *hldev)
{
        struct pci_dev *dev = hldev->pdev;
        u16 lnk;

        pcie_capability_read_word(dev, PCI_EXP_LNKSTA, &lnk);
        return (lnk & VXGE_HW_PCI_EXP_LNKCAP_LNK_WIDTH) >> 4;
}

/*
 * __vxge_hw_ring_block_memblock_idx - Return the memblock index
 * This function returns the index of memory block
 */
static inline u32
__vxge_hw_ring_block_memblock_idx(u8 *block)
{
        return (u32)*((u64 *)(block + VXGE_HW_RING_MEMBLOCK_IDX_OFFSET));
}

/*
 * __vxge_hw_ring_block_memblock_idx_set - Sets the memblock index

 * This function sets index to a memory block
 */
static inline void
__vxge_hw_ring_block_memblock_idx_set(u8 *block, u32 memblock_idx)
{
        *((u64 *)(block + VXGE_HW_RING_MEMBLOCK_IDX_OFFSET)) = memblock_idx;
}

/*
 * __vxge_hw_ring_block_next_pointer_set - Sets the next block pointer
 * in RxD block
 * Sets the next block pointer in RxD block
 */
static inline void
__vxge_hw_ring_block_next_pointer_set(u8 *block, dma_addr_t dma_next)
{
        *((u64 *)(block + VXGE_HW_RING_NEXT_BLOCK_POINTER_OFFSET)) = dma_next;
}

/*
 * __vxge_hw_ring_first_block_address_get - Returns the dma address of the
 *             first block
 * Returns the dma address of the first RxD block
 */
static u64 __vxge_hw_ring_first_block_address_get(struct __vxge_hw_ring *ring)
{
        struct vxge_hw_mempool_dma *dma_object;

        dma_object = ring->mempool->memblocks_dma_arr;
        vxge_assert(dma_object != NULL);

        return dma_object->addr;
}

/*
 * __vxge_hw_ring_item_dma_addr - Return the dma address of an item
 * This function returns the dma address of a given item
 */
static dma_addr_t __vxge_hw_ring_item_dma_addr(struct vxge_hw_mempool *mempoolh,
                                               void *item)
{
        u32 memblock_idx;
        void *memblock;
        struct vxge_hw_mempool_dma *memblock_dma_object;
        ptrdiff_t dma_item_offset;

        /* get owner memblock index */
        memblock_idx = __vxge_hw_ring_block_memblock_idx(item);

        /* get owner memblock by memblock index */
        memblock = mempoolh->memblocks_arr[memblock_idx];

        /* get memblock DMA object by memblock index */
        memblock_dma_object = mempoolh->memblocks_dma_arr + memblock_idx;

        /* calculate offset in the memblock of this item */
        dma_item_offset = (u8 *)item - (u8 *)memblock;

        return memblock_dma_object->addr + dma_item_offset;
}

/*
 * __vxge_hw_ring_rxdblock_link - Link the RxD blocks
 * This function returns the dma address of a given item
 */
static void __vxge_hw_ring_rxdblock_link(struct vxge_hw_mempool *mempoolh,
                                         struct __vxge_hw_ring *ring, u32 from,
                                         u32 to)
{
        u8 *to_item , *from_item;
        dma_addr_t to_dma;

        /* get "from" RxD block */
        from_item = mempoolh->items_arr[from];
        vxge_assert(from_item);

        /* get "to" RxD block */
        to_item = mempoolh->items_arr[to];
        vxge_assert(to_item);

        /* return address of the beginning of previous RxD block */
        to_dma = __vxge_hw_ring_item_dma_addr(mempoolh, to_item);

        /* set next pointer for this RxD block to point on
         * previous item's DMA start address */
        __vxge_hw_ring_block_next_pointer_set(from_item, to_dma);
}

/*
 * __vxge_hw_ring_mempool_item_alloc - Allocate List blocks for RxD
 * block callback
 * This function is callback passed to __vxge_hw_mempool_create to create memory
 * pool for RxD block
 */
static void
__vxge_hw_ring_mempool_item_alloc(struct vxge_hw_mempool *mempoolh,
                                  u32 memblock_index,
                                  struct vxge_hw_mempool_dma *dma_object,
                                  u32 index, u32 is_last)
{
        u32 i;
        void *item = mempoolh->items_arr[index];
        struct __vxge_hw_ring *ring =
                (struct __vxge_hw_ring *)mempoolh->userdata;

        /* format rxds array */
        for (i = 0; i < ring->rxds_per_block; i++) {
                void *rxdblock_priv;
                void *uld_priv;
                struct vxge_hw_ring_rxd_1 *rxdp;

                u32 reserve_index = ring->channel.reserve_ptr -
                                (index * ring->rxds_per_block + i + 1);
                u32 memblock_item_idx;

                ring->channel.reserve_arr[reserve_index] = ((u8 *)item) +
                                                i * ring->rxd_size;

                /* Note: memblock_item_idx is index of the item within
                 *       the memblock. For instance, in case of three RxD-blocks
                 *       per memblock this value can be 0, 1 or 2. */
                rxdblock_priv = __vxge_hw_mempool_item_priv(mempoolh,
                                        memblock_index, item,
                                        &memblock_item_idx);

                rxdp = ring->channel.reserve_arr[reserve_index];

                uld_priv = ((u8 *)rxdblock_priv + ring->rxd_priv_size * i);

                /* pre-format Host_Control */
                rxdp->host_control = (u64)(size_t)uld_priv;
        }

        __vxge_hw_ring_block_memblock_idx_set(item, memblock_index);

        if (is_last) {
                /* link last one with first one */
                __vxge_hw_ring_rxdblock_link(mempoolh, ring, index, 0);
        }

        if (index > 0) {
                /* link this RxD block with previous one */
                __vxge_hw_ring_rxdblock_link(mempoolh, ring, index - 1, index);
        }
}

/*
 * __vxge_hw_ring_replenish - Initial replenish of RxDs
 * This function replenishes the RxDs from reserve array to work array
 */
enum vxge_hw_status
vxge_hw_ring_replenish(struct __vxge_hw_ring *ring)
{
        void *rxd;
        struct __vxge_hw_channel *channel;
        enum vxge_hw_status status = VXGE_HW_OK;

        channel = &ring->channel;

        while (vxge_hw_channel_dtr_count(channel) > 0) {

                status = vxge_hw_ring_rxd_reserve(ring, &rxd);

                vxge_assert(status == VXGE_HW_OK);

                if (ring->rxd_init) {
                        status = ring->rxd_init(rxd, channel->userdata);
                        if (status != VXGE_HW_OK) {
                                vxge_hw_ring_rxd_free(ring, rxd);
                                goto exit;
                        }
                }

                vxge_hw_ring_rxd_post(ring, rxd);
        }
        status = VXGE_HW_OK;
exit:
        return status;
}

/*
 * __vxge_hw_channel_allocate - Allocate memory for channel
 * This function allocates required memory for the channel and various arrays
 * in the channel
 */
static 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)
{
        struct __vxge_hw_channel *channel;
        struct __vxge_hw_device *hldev;
        int size = 0;
        u32 vp_id;

        hldev = vph->vpath->hldev;
        vp_id = vph->vpath->vp_id;

        switch (type) {
        case VXGE_HW_CHANNEL_TYPE_FIFO:
                size = sizeof(struct __vxge_hw_fifo);
                break;
        case VXGE_HW_CHANNEL_TYPE_RING:
                size = sizeof(struct __vxge_hw_ring);
                break;
        default:
                break;
        }

        channel = kzalloc(size, GFP_KERNEL);
        if (channel == NULL)
                goto exit0;
        INIT_LIST_HEAD(&channel->item);

        channel->common_reg = hldev->common_reg;
        channel->first_vp_id = hldev->first_vp_id;
        channel->type = type;
        channel->devh = hldev;
        channel->vph = vph;
        channel->userdata = userdata;
        channel->per_dtr_space = per_dtr_space;
        channel->length = length;
        channel->vp_id = vp_id;

        channel->work_arr = kzalloc(sizeof(void *)*length, GFP_KERNEL);
        if (channel->work_arr == NULL)
                goto exit1;

        channel->free_arr = kzalloc(sizeof(void *)*length, GFP_KERNEL);
        if (channel->free_arr == NULL)
                goto exit1;
        channel->free_ptr = length;

        channel->reserve_arr = kzalloc(sizeof(void *)*length, GFP_KERNEL);
        if (channel->reserve_arr == NULL)
                goto exit1;
        channel->reserve_ptr = length;
        channel->reserve_top = 0;

        channel->orig_arr = kzalloc(sizeof(void *)*length, GFP_KERNEL);
        if (channel->orig_arr == NULL)
                goto exit1;

        return channel;
exit1:
        __vxge_hw_channel_free(channel);

exit0:
        return NULL;
}

/*
 * vxge_hw_blockpool_block_add - callback for vxge_os_dma_malloc_async
 * Adds a block to block pool
 */
static 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)
{
        struct __vxge_hw_blockpool *blockpool;
        struct __vxge_hw_blockpool_entry *entry = NULL;
        dma_addr_t dma_addr;
        enum vxge_hw_status status = VXGE_HW_OK;
        u32 req_out;

        blockpool = &devh->block_pool;

        if (block_addr == NULL) {
                blockpool->req_out--;
                status = VXGE_HW_FAIL;
                goto exit;
        }

        dma_addr = pci_map_single(devh->pdev, block_addr, length,
                                PCI_DMA_BIDIRECTIONAL);

        if (unlikely(pci_dma_mapping_error(devh->pdev, dma_addr))) {
                vxge_os_dma_free(devh->pdev, block_addr, &acc_handle);
                blockpool->req_out--;
                status = VXGE_HW_FAIL;
                goto exit;
        }

        if (!list_empty(&blockpool->free_entry_list))
                entry = (struct __vxge_hw_blockpool_entry *)
                        list_first_entry(&blockpool->free_entry_list,
                                struct __vxge_hw_blockpool_entry,
                                item);

        if (entry == NULL)
                entry = vmalloc(sizeof(struct __vxge_hw_blockpool_entry));
        else
                list_del(&entry->item);

        if (entry != NULL) {
                entry->length = length;
                entry->memblock = block_addr;
                entry->dma_addr = dma_addr;
                entry->acc_handle = acc_handle;
                entry->dma_handle = dma_h;
                list_add(&entry->item, &blockpool->free_block_list);
                blockpool->pool_size++;
                status = VXGE_HW_OK;
        } else
                status = VXGE_HW_ERR_OUT_OF_MEMORY;

        blockpool->req_out--;

        req_out = blockpool->req_out;
exit:
        return;
}

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);
}

/*
 * __vxge_hw_blockpool_blocks_add - Request additional blocks
 */
static
void __vxge_hw_blockpool_blocks_add(struct __vxge_hw_blockpool *blockpool)
{
        u32 nreq = 0, i;

        if ((blockpool->pool_size  +  blockpool->req_out) <
                VXGE_HW_MIN_DMA_BLOCK_POOL_SIZE) {
                nreq = VXGE_HW_INCR_DMA_BLOCK_POOL_SIZE;
                blockpool->req_out += nreq;
        }

        for (i = 0; i < nreq; i++)
                vxge_os_dma_malloc_async(
                        (blockpool->hldev)->pdev,
                        blockpool->hldev, VXGE_HW_BLOCK_SIZE);
}

/*
 * __vxge_hw_blockpool_malloc - Allocate a memory block from pool
 * Allocates a block of memory of given size, either from block pool
 * or by calling vxge_os_dma_malloc()
 */
static void *__vxge_hw_blockpool_malloc(struct __vxge_hw_device *devh, u32 size,
                                        struct vxge_hw_mempool_dma *dma_object)
{
        struct __vxge_hw_blockpool_entry *entry = NULL;
        struct __vxge_hw_blockpool  *blockpool;
        void *memblock = NULL;
        enum vxge_hw_status status = VXGE_HW_OK;

        blockpool = &devh->block_pool;

        if (size != blockpool->block_size) {

                memblock = vxge_os_dma_malloc(devh->pdev, size,
                                                &dma_object->handle,
                                                &dma_object->acc_handle);

                if (memblock == NULL) {
                        status = VXGE_HW_ERR_OUT_OF_MEMORY;
                        goto exit;
                }

                dma_object->addr = pci_map_single(devh->pdev, memblock, size,
                                        PCI_DMA_BIDIRECTIONAL);

                if (unlikely(pci_dma_mapping_error(devh->pdev,
                                dma_object->addr))) {
                        vxge_os_dma_free(devh->pdev, memblock,
                                &dma_object->acc_handle);
                        status = VXGE_HW_ERR_OUT_OF_MEMORY;
                        goto exit;
                }

        } else {

                if (!list_empty(&blockpool->free_block_list))
                        entry = (struct __vxge_hw_blockpool_entry *)
                                list_first_entry(&blockpool->free_block_list,
                                        struct __vxge_hw_blockpool_entry,
                                        item);

                if (entry != NULL) {
                        list_del(&entry->item);
                        dma_object->addr = entry->dma_addr;
                        dma_object->handle = entry->dma_handle;
                        dma_object->acc_handle = entry->acc_handle;
                        memblock = entry->memblock;

                        list_add(&entry->item,
                                &blockpool->free_entry_list);
                        blockpool->pool_size--;
                }

                if (memblock != NULL)
                        __vxge_hw_blockpool_blocks_add(blockpool);
        }
exit:
        return memblock;
}

/*
 * __vxge_hw_blockpool_blocks_remove - Free additional blocks
 */
static void
__vxge_hw_blockpool_blocks_remove(struct __vxge_hw_blockpool *blockpool)
{
        struct list_head *p, *n;

        list_for_each_safe(p, n, &blockpool->free_block_list) {

                if (blockpool->pool_size < blockpool->pool_max)
                        break;

                pci_unmap_single(
                        (blockpool->hldev)->pdev,
                        ((struct __vxge_hw_blockpool_entry *)p)->dma_addr,
                        ((struct __vxge_hw_blockpool_entry *)p)->length,
                        PCI_DMA_BIDIRECTIONAL);

                vxge_os_dma_free(
                        (blockpool->hldev)->pdev,
                        ((struct __vxge_hw_blockpool_entry *)p)->memblock,
                        &((struct __vxge_hw_blockpool_entry *)p)->acc_handle);

                list_del(&((struct __vxge_hw_blockpool_entry *)p)->item);

                list_add(p, &blockpool->free_entry_list);

                blockpool->pool_size--;

        }
}

/*
 * __vxge_hw_blockpool_free - Frees the memory allcoated with
 *                              __vxge_hw_blockpool_malloc
 */
static void __vxge_hw_blockpool_free(struct __vxge_hw_device *devh,
                                     void *memblock, u32 size,
                                     struct vxge_hw_mempool_dma *dma_object)
{
        struct __vxge_hw_blockpool_entry *entry = NULL;
        struct __vxge_hw_blockpool  *blockpool;
        enum vxge_hw_status status = VXGE_HW_OK;

        blockpool = &devh->block_pool;

        if (size != blockpool->block_size) {
                pci_unmap_single(devh->pdev, dma_object->addr, size,
                        PCI_DMA_BIDIRECTIONAL);
                vxge_os_dma_free(devh->pdev, memblock, &dma_object->acc_handle);
        } else {

                if (!list_empty(&blockpool->free_entry_list))
                        entry = (struct __vxge_hw_blockpool_entry *)
                                list_first_entry(&blockpool->free_entry_list,
                                        struct __vxge_hw_blockpool_entry,
                                        item);

                if (entry == NULL)
                        entry = vmalloc(sizeof(
                                        struct __vxge_hw_blockpool_entry));
                else
                        list_del(&entry->item);

                if (entry != NULL) {
                        entry->length = size;
                        entry->memblock = memblock;
                        entry->dma_addr = dma_object->addr;
                        entry->acc_handle = dma_object->acc_handle;
                        entry->dma_handle = dma_object->handle;
                        list_add(&entry->item,
                                        &blockpool->free_block_list);
                        blockpool->pool_size++;
                        status = VXGE_HW_OK;
                } else
                        status = VXGE_HW_ERR_OUT_OF_MEMORY;

                if (status == VXGE_HW_OK)
                        __vxge_hw_blockpool_blocks_remove(blockpool);
        }
}

/*
 * vxge_hw_mempool_destroy
 */
static void __vxge_hw_mempool_destroy(struct vxge_hw_mempool *mempool)
{
        u32 i, j;
        struct __vxge_hw_device *devh = mempool->devh;

        for (i = 0; i < mempool->memblocks_allocated; i++) {
                struct vxge_hw_mempool_dma *dma_object;

                vxge_assert(mempool->memblocks_arr[i]);
                vxge_assert(mempool->memblocks_dma_arr + i);

                dma_object = mempool->memblocks_dma_arr + i;

                for (j = 0; j < mempool->items_per_memblock; j++) {
                        u32 index = i * mempool->items_per_memblock + j;

                        /* to skip last partially filled(if any) memblock */
                        if (index >= mempool->items_current)
                                break;
                }

                vfree(mempool->memblocks_priv_arr[i]);

                __vxge_hw_blockpool_free(devh, mempool->memblocks_arr[i],
                                mempool->memblock_size, dma_object);
        }

        vfree(mempool->items_arr);
        vfree(mempool->memblocks_dma_arr);
        vfree(mempool->memblocks_priv_arr);
        vfree(mempool->memblocks_arr);
        vfree(mempool);
}

/*
 * __vxge_hw_mempool_grow
 * Will resize mempool up to %num_allocate value.
 */
static enum vxge_hw_status
__vxge_hw_mempool_grow(struct vxge_hw_mempool *mempool, u32 num_allocate,
                       u32 *num_allocated)
{
        u32 i, first_time = mempool->memblocks_allocated == 0 ? 1 : 0;
        u32 n_items = mempool->items_per_memblock;
        u32 start_block_idx = mempool->memblocks_allocated;
        u32 end_block_idx = mempool->memblocks_allocated + num_allocate;
        enum vxge_hw_status status = VXGE_HW_OK;

        *num_allocated = 0;

        if (end_block_idx > mempool->memblocks_max) {
                status = VXGE_HW_ERR_OUT_OF_MEMORY;
                goto exit;
        }

        for (i = start_block_idx; i < end_block_idx; i++) {
                u32 j;
                u32 is_last = ((end_block_idx - 1) == i);
                struct vxge_hw_mempool_dma *dma_object =
                        mempool->memblocks_dma_arr + i;
                void *the_memblock;

                /* allocate memblock's private part. Each DMA memblock
                 * has a space allocated for item's private usage upon
                 * mempool's user request. Each time mempool grows, it will
                 * allocate new memblock and its private part at once.
                 * This helps to minimize memory usage a lot. */
                mempool->memblocks_priv_arr[i] =
                                vzalloc(mempool->items_priv_size * n_items);
                if (mempool->memblocks_priv_arr[i] == NULL) {
                        status = VXGE_HW_ERR_OUT_OF_MEMORY;
                        goto exit;
                }

                /* allocate DMA-capable memblock */
                mempool->memblocks_arr[i] =
                        __vxge_hw_blockpool_malloc(mempool->devh,
                                mempool->memblock_size, dma_object);
                if (mempool->memblocks_arr[i] == NULL) {
                        vfree(mempool->memblocks_priv_arr[i]);
                        status = VXGE_HW_ERR_OUT_OF_MEMORY;
                        goto exit;
                }

                (*num_allocated)++;
                mempool->memblocks_allocated++;

                memset(mempool->memblocks_arr[i], 0, mempool->memblock_size);

                the_memblock = mempool->memblocks_arr[i];

                /* fill the items hash array */
                for (j = 0; j < n_items; j++) {
                        u32 index = i * n_items + j;

                        if (first_time && index >= mempool->items_initial)
                                break;

                        mempool->items_arr[index] =
                                ((char *)the_memblock + j*mempool->item_size);

                        /* let caller to do more job on each item */
                        if (mempool->item_func_alloc != NULL)
                                mempool->item_func_alloc(mempool, i,
                                        dma_object, index, is_last);

                        mempool->items_current = index + 1;
                }

                if (first_time && mempool->items_current ==
                                        mempool->items_initial)
                        break;
        }
exit:
        return status;
}

/*
 * vxge_hw_mempool_create
 * This function will create memory pool object. Pool may grow but will
 * never shrink. Pool consists of number of dynamically allocated blocks
 * with size enough to hold %items_initial number of items. Memory is
 * DMA-able but client must map/unmap before interoperating with the device.
 */
static struct vxge_hw_mempool *
__vxge_hw_mempool_create(struct __vxge_hw_device *devh,
                         u32 memblock_size,
                         u32 item_size,
                         u32 items_priv_size,
                         u32 items_initial,
                         u32 items_max,
                         const struct vxge_hw_mempool_cbs *mp_callback,
                         void *userdata)
{
        enum vxge_hw_status status = VXGE_HW_OK;
        u32 memblocks_to_allocate;
        struct vxge_hw_mempool *mempool = NULL;
        u32 allocated;

        if (memblock_size < item_size) {
                status = VXGE_HW_FAIL;
                goto exit;
        }

        mempool = vzalloc(sizeof(struct vxge_hw_mempool));
        if (mempool == NULL) {
                status = VXGE_HW_ERR_OUT_OF_MEMORY;
                goto exit;
        }

        mempool->devh                   = devh;
        mempool->memblock_size          = memblock_size;
        mempool->items_max              = items_max;
        mempool->items_initial          = items_initial;
        mempool->item_size              = item_size;
        mempool->items_priv_size        = items_priv_size;
        mempool->item_func_alloc        = mp_callback->item_func_alloc;
        mempool->userdata               = userdata;

        mempool->memblocks_allocated = 0;

        mempool->items_per_memblock = memblock_size / item_size;

        mempool->memblocks_max = (items_max + mempool->items_per_memblock - 1) /
                                        mempool->items_per_memblock;

        /* allocate array of memblocks */
        mempool->memblocks_arr =
                vzalloc(sizeof(void *) * mempool->memblocks_max);
        if (mempool->memblocks_arr == NULL) {
                __vxge_hw_mempool_destroy(mempool);
                status = VXGE_HW_ERR_OUT_OF_MEMORY;
                mempool = NULL;
                goto exit;
        }

        /* allocate array of private parts of items per memblocks */
        mempool->memblocks_priv_arr =
                vzalloc(sizeof(void *) * mempool->memblocks_max);
        if (mempool->memblocks_priv_arr == NULL) {
                __vxge_hw_mempool_destroy(mempool);
                status = VXGE_HW_ERR_OUT_OF_MEMORY;
                mempool = NULL;
                goto exit;
        }

        /* allocate array of memblocks DMA objects */
        mempool->memblocks_dma_arr =
                vzalloc(sizeof(struct vxge_hw_mempool_dma) *
                        mempool->memblocks_max);
        if (mempool->memblocks_dma_arr == NULL) {
                __vxge_hw_mempool_destroy(mempool);
                status = VXGE_HW_ERR_OUT_OF_MEMORY;
                mempool = NULL;
                goto exit;
        }

        /* allocate hash array of items */
        mempool->items_arr = vzalloc(sizeof(void *) * mempool->items_max);
        if (mempool->items_arr == NULL) {
                __vxge_hw_mempool_destroy(mempool);
                status = VXGE_HW_ERR_OUT_OF_MEMORY;
                mempool = NULL;
                goto exit;
        }

        /* calculate initial number of memblocks */
        memblocks_to_allocate = (mempool->items_initial +
                                 mempool->items_per_memblock - 1) /
                                                mempool->items_per_memblock;

        /* pre-allocate the mempool */
        status = __vxge_hw_mempool_grow(mempool, memblocks_to_allocate,
                                        &allocated);
        if (status != VXGE_HW_OK) {
                __vxge_hw_mempool_destroy(mempool);
                status = VXGE_HW_ERR_OUT_OF_MEMORY;
                mempool = NULL;
                goto exit;
        }

exit:
        return mempool;
}

/*
 * __vxge_hw_ring_abort - Returns the RxD
 * This function terminates the RxDs of ring
 */
static enum vxge_hw_status __vxge_hw_ring_abort(struct __vxge_hw_ring *ring)
{
        void *rxdh;
        struct __vxge_hw_channel *channel;

        channel = &ring->channel;

        for (;;) {
                vxge_hw_channel_dtr_try_complete(channel, &rxdh);

                if (rxdh == NULL)
                        break;

                vxge_hw_channel_dtr_complete(channel);

                if (ring->rxd_term)
                        ring->rxd_term(rxdh, VXGE_HW_RXD_STATE_POSTED,
                                channel->userdata);

                vxge_hw_channel_dtr_free(channel, rxdh);
        }

        return VXGE_HW_OK;
}

/*
 * __vxge_hw_ring_reset - Resets the ring
 * This function resets the ring during vpath reset operation
 */
static enum vxge_hw_status __vxge_hw_ring_reset(struct __vxge_hw_ring *ring)
{
        enum vxge_hw_status status = VXGE_HW_OK;
        struct __vxge_hw_channel *channel;

        channel = &ring->channel;

        __vxge_hw_ring_abort(ring);

        status = __vxge_hw_channel_reset(channel);

        if (status != VXGE_HW_OK)
                goto exit;

        if (ring->rxd_init) {
                status = vxge_hw_ring_replenish(ring);
                if (status != VXGE_HW_OK)
                        goto exit;
        }
exit:
        return status;
}

/*
 * __vxge_hw_ring_delete - Removes the ring
 * This function freeup the memory pool and removes the ring
 */
static enum vxge_hw_status
__vxge_hw_ring_delete(struct __vxge_hw_vpath_handle *vp)
{
        struct __vxge_hw_ring *ring = vp->vpath->ringh;

        __vxge_hw_ring_abort(ring);

        if (ring->mempool)
                __vxge_hw_mempool_destroy(ring->mempool);

        vp->vpath->ringh = NULL;
        __vxge_hw_channel_free(&ring->channel);

        return VXGE_HW_OK;
}

/*
 * __vxge_hw_ring_create - Create a Ring
 * This function creates Ring and initializes it.
 */
static enum vxge_hw_status
__vxge_hw_ring_create(struct __vxge_hw_vpath_handle *vp,
                      struct vxge_hw_ring_attr *attr)
{
        enum vxge_hw_status status = VXGE_HW_OK;
        struct __vxge_hw_ring *ring;
        u32 ring_length;
        struct vxge_hw_ring_config *config;
        struct __vxge_hw_device *hldev;
        u32 vp_id;
        static const struct vxge_hw_mempool_cbs ring_mp_callback = {
                .item_func_alloc = __vxge_hw_ring_mempool_item_alloc,
        };

        if ((vp == NULL) || (attr == NULL)) {
                status = VXGE_HW_FAIL;
                goto exit;
        }

        hldev = vp->vpath->hldev;
        vp_id = vp->vpath->vp_id;

        config = &hldev->config.vp_config[vp_id].ring;

        ring_length = config->ring_blocks *
                        vxge_hw_ring_rxds_per_block_get(config->buffer_mode);

        ring = (struct __vxge_hw_ring *)__vxge_hw_channel_allocate(vp,
                                                VXGE_HW_CHANNEL_TYPE_RING,
                                                ring_length,
                                                attr->per_rxd_space,
                                                attr->userdata);
        if (ring == NULL) {
                status = VXGE_HW_ERR_OUT_OF_MEMORY;
                goto exit;
        }

        vp->vpath->ringh = ring;
        ring->vp_id = vp_id;
        ring->vp_reg = vp->vpath->vp_reg;
        ring->common_reg = hldev->common_reg;
        ring->stats = &vp->vpath->sw_stats->ring_stats;
        ring->config = config;
        ring->callback = attr->callback;
        ring->rxd_init = attr->rxd_init;
        ring->rxd_term = attr->rxd_term;
        ring->buffer_mode = config->buffer_mode;
        ring->tim_rti_cfg1_saved = vp->vpath->tim_rti_cfg1_saved;
        ring->tim_rti_cfg3_saved = vp->vpath->tim_rti_cfg3_saved;
        ring->rxds_limit = config->rxds_limit;

        ring->rxd_size = vxge_hw_ring_rxd_size_get(config->buffer_mode);
        ring->rxd_priv_size =
                sizeof(struct __vxge_hw_ring_rxd_priv) + attr->per_rxd_space;
        ring->per_rxd_space = attr->per_rxd_space;

        ring->rxd_priv_size =
                ((ring->rxd_priv_size + VXGE_CACHE_LINE_SIZE - 1) /
                VXGE_CACHE_LINE_SIZE) * VXGE_CACHE_LINE_SIZE;

        /* how many RxDs can fit into one block. Depends on configured
         * buffer_mode. */
        ring->rxds_per_block =
                vxge_hw_ring_rxds_per_block_get(config->buffer_mode);

        /* calculate actual RxD block private size */
        ring->rxdblock_priv_size = ring->rxd_priv_size * ring->rxds_per_block;
        ring->mempool = __vxge_hw_mempool_create(hldev,
                                VXGE_HW_BLOCK_SIZE,
                                VXGE_HW_BLOCK_SIZE,
                                ring->rxdblock_priv_size,
                                ring->config->ring_blocks,
                                ring->config->ring_blocks,
                                &ring_mp_callback,
                                ring);
        if (ring->mempool == NULL) {
                __vxge_hw_ring_delete(vp);
                return VXGE_HW_ERR_OUT_OF_MEMORY;
        }

        status = __vxge_hw_channel_initialize(&ring->channel);
        if (status != VXGE_HW_OK) {
                __vxge_hw_ring_delete(vp);
                goto exit;
        }

        /* Note:
         * Specifying rxd_init callback means two things:
         * 1) rxds need to be initialized by driver at channel-open time;
         * 2) rxds need to be posted at channel-open time
         *    (that's what the initial_replenish() below does)
         * Currently we don't have a case when the 1) is done without the 2).
         */
        if (ring->rxd_init) {
                status = vxge_hw_ring_replenish(ring);
                if (status != VXGE_HW_OK) {
                        __vxge_hw_ring_delete(vp);
                        goto exit;
                }
        }

        /* initial replenish will increment the counter in its post() routine,
         * we have to reset it */
        ring->stats->common_stats.usage_cnt = 0;
exit:
        return status;
}

/*
 * vxge_hw_device_config_default_get - Initialize device config with defaults.
 * Initialize Titan device config with default values.
 */
enum vxge_hw_status
vxge_hw_device_config_default_get(struct vxge_hw_device_config *device_config)
{
        u32 i;

        device_config->dma_blockpool_initial =
                                        VXGE_HW_INITIAL_DMA_BLOCK_POOL_SIZE;
        device_config->dma_blockpool_max = VXGE_HW_MAX_DMA_BLOCK_POOL_SIZE;
        device_config->intr_mode = VXGE_HW_INTR_MODE_DEF;
        device_config->rth_en = VXGE_HW_RTH_DEFAULT;
        device_config->rth_it_type = VXGE_HW_RTH_IT_TYPE_DEFAULT;
        device_config->device_poll_millis =  VXGE_HW_DEF_DEVICE_POLL_MILLIS;
        device_config->rts_mac_en =  VXGE_HW_RTS_MAC_DEFAULT;

        for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
                device_config->vp_config[i].vp_id = i;

                device_config->vp_config[i].min_bandwidth =
                                VXGE_HW_VPATH_BANDWIDTH_DEFAULT;

                device_config->vp_config[i].ring.enable = VXGE_HW_RING_DEFAULT;

                device_config->vp_config[i].ring.ring_blocks =
                                VXGE_HW_DEF_RING_BLOCKS;

                device_config->vp_config[i].ring.buffer_mode =
                                VXGE_HW_RING_RXD_BUFFER_MODE_DEFAULT;

                device_config->vp_config[i].ring.scatter_mode =
                                VXGE_HW_RING_SCATTER_MODE_USE_FLASH_DEFAULT;

                device_config->vp_config[i].ring.rxds_limit =
                                VXGE_HW_DEF_RING_RXDS_LIMIT;

                device_config->vp_config[i].fifo.enable = VXGE_HW_FIFO_ENABLE;

                device_config->vp_config[i].fifo.fifo_blocks =
                                VXGE_HW_MIN_FIFO_BLOCKS;

                device_config->vp_config[i].fifo.max_frags =
                                VXGE_HW_MAX_FIFO_FRAGS;

                device_config->vp_config[i].fifo.memblock_size =
                                VXGE_HW_DEF_FIFO_MEMBLOCK_SIZE;

                device_config->vp_config[i].fifo.alignment_size =
                                VXGE_HW_DEF_FIFO_ALIGNMENT_SIZE;

                device_config->vp_config[i].fifo.intr =
                                VXGE_HW_FIFO_QUEUE_INTR_DEFAULT;

                device_config->vp_config[i].fifo.no_snoop_bits =
                                VXGE_HW_FIFO_NO_SNOOP_DEFAULT;
                device_config->vp_config[i].tti.intr_enable =
                                VXGE_HW_TIM_INTR_DEFAULT;

                device_config->vp_config[i].tti.btimer_val =
                                VXGE_HW_USE_FLASH_DEFAULT;

                device_config->vp_config[i].tti.timer_ac_en =
                                VXGE_HW_USE_FLASH_DEFAULT;

                device_config->vp_config[i].tti.timer_ci_en =
                                VXGE_HW_USE_FLASH_DEFAULT;

                device_config->vp_config[i].tti.timer_ri_en =
                                VXGE_HW_USE_FLASH_DEFAULT;

                device_config->vp_config[i].tti.rtimer_val =
                                VXGE_HW_USE_FLASH_DEFAULT;

                device_config->vp_config[i].tti.util_sel =
                                VXGE_HW_USE_FLASH_DEFAULT;

                device_config->vp_config[i].tti.ltimer_val =
                                VXGE_HW_USE_FLASH_DEFAULT;

                device_config->vp_config[i].tti.urange_a =
                                VXGE_HW_USE_FLASH_DEFAULT;

                device_config->vp_config[i].tti.uec_a =