diff options
Diffstat (limited to 'drivers/net/vxge/vxge-traffic.c')
| -rw-r--r-- | drivers/net/vxge/vxge-traffic.c | 2528 |
1 files changed, 2528 insertions, 0 deletions
diff --git a/drivers/net/vxge/vxge-traffic.c b/drivers/net/vxge/vxge-traffic.c new file mode 100644 index 00000000000..7be0ae10d69 --- /dev/null +++ b/drivers/net/vxge/vxge-traffic.c @@ -0,0 +1,2528 @@ +/****************************************************************************** + * 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-traffic.c: Driver for Neterion Inc's X3100 Series 10GbE PCIe I/O + * Virtualized Server Adapter. + * Copyright(c) 2002-2009 Neterion Inc. + ******************************************************************************/ +#include <linux/etherdevice.h> + +#include "vxge-traffic.h" +#include "vxge-config.h" +#include "vxge-main.h" + +/* + * vxge_hw_vpath_intr_enable - Enable vpath interrupts. + * @vp: Virtual Path handle. + * + * Enable vpath interrupts. The function is to be executed the last in + * vpath initialization sequence. + * + * See also: vxge_hw_vpath_intr_disable() + */ +enum vxge_hw_status vxge_hw_vpath_intr_enable(struct __vxge_hw_vpath_handle *vp) +{ + u64 val64; + + struct __vxge_hw_virtualpath *vpath; + struct vxge_hw_vpath_reg __iomem *vp_reg; + enum vxge_hw_status status = VXGE_HW_OK; + if (vp == NULL) { + status = VXGE_HW_ERR_INVALID_HANDLE; + goto exit; + } + + vpath = vp->vpath; + + if (vpath->vp_open == VXGE_HW_VP_NOT_OPEN) { + status = VXGE_HW_ERR_VPATH_NOT_OPEN; + goto exit; + } + + vp_reg = vpath->vp_reg; + + writeq(VXGE_HW_INTR_MASK_ALL, &vp_reg->kdfcctl_errors_reg); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->general_errors_reg); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->pci_config_errors_reg); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->mrpcim_to_vpath_alarm_reg); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->srpcim_to_vpath_alarm_reg); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->vpath_ppif_int_status); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->srpcim_msg_to_vpath_reg); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->vpath_pcipif_int_status); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->prc_alarm_reg); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->wrdma_alarm_status); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->asic_ntwk_vp_err_reg); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->xgmac_vp_int_status); + + val64 = readq(&vp_reg->vpath_general_int_status); + + /* Mask unwanted interrupts */ + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->vpath_pcipif_int_mask); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->srpcim_msg_to_vpath_mask); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->srpcim_to_vpath_alarm_mask); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->mrpcim_to_vpath_alarm_mask); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->pci_config_errors_mask); + + /* Unmask the individual interrupts */ + + writeq((u32)vxge_bVALn((VXGE_HW_GENERAL_ERRORS_REG_DBLGEN_FIFO1_OVRFLOW| + VXGE_HW_GENERAL_ERRORS_REG_DBLGEN_FIFO2_OVRFLOW| + VXGE_HW_GENERAL_ERRORS_REG_STATSB_DROP_TIMEOUT_REQ| + VXGE_HW_GENERAL_ERRORS_REG_STATSB_PIF_CHAIN_ERR), 0, 32), + &vp_reg->general_errors_mask); + + __vxge_hw_pio_mem_write32_upper( + (u32)vxge_bVALn((VXGE_HW_KDFCCTL_ERRORS_REG_KDFCCTL_FIFO1_OVRWR| + VXGE_HW_KDFCCTL_ERRORS_REG_KDFCCTL_FIFO2_OVRWR| + VXGE_HW_KDFCCTL_ERRORS_REG_KDFCCTL_FIFO1_POISON| + VXGE_HW_KDFCCTL_ERRORS_REG_KDFCCTL_FIFO2_POISON| + VXGE_HW_KDFCCTL_ERRORS_REG_KDFCCTL_FIFO1_DMA_ERR| + VXGE_HW_KDFCCTL_ERRORS_REG_KDFCCTL_FIFO1_DMA_ERR), 0, 32), + &vp_reg->kdfcctl_errors_mask); + + __vxge_hw_pio_mem_write32_upper(0, &vp_reg->vpath_ppif_int_mask); + + __vxge_hw_pio_mem_write32_upper( + (u32)vxge_bVALn(VXGE_HW_PRC_ALARM_REG_PRC_RING_BUMP, 0, 32), + &vp_reg->prc_alarm_mask); + + __vxge_hw_pio_mem_write32_upper(0, &vp_reg->wrdma_alarm_mask); + __vxge_hw_pio_mem_write32_upper(0, &vp_reg->xgmac_vp_int_mask); + + if (vpath->hldev->first_vp_id != vpath->vp_id) + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->asic_ntwk_vp_err_mask); + else + __vxge_hw_pio_mem_write32_upper((u32)vxge_bVALn(( + VXGE_HW_ASIC_NTWK_VP_ERR_REG_XMACJ_NTWK_REAFFIRMED_FAULT | + VXGE_HW_ASIC_NTWK_VP_ERR_REG_XMACJ_NTWK_REAFFIRMED_OK), 0, 32), + &vp_reg->asic_ntwk_vp_err_mask); + + __vxge_hw_pio_mem_write32_upper(0, + &vp_reg->vpath_general_int_mask); +exit: + return status; + +} + +/* + * vxge_hw_vpath_intr_disable - Disable vpath interrupts. + * @vp: Virtual Path handle. + * + * Disable vpath interrupts. The function is to be executed the last in + * vpath initialization sequence. + * + * See also: vxge_hw_vpath_intr_enable() + */ +enum vxge_hw_status vxge_hw_vpath_intr_disable( + struct __vxge_hw_vpath_handle *vp) +{ + u64 val64; + + struct __vxge_hw_virtualpath *vpath; + enum vxge_hw_status status = VXGE_HW_OK; + struct vxge_hw_vpath_reg __iomem *vp_reg; + if (vp == NULL) { + status = VXGE_HW_ERR_INVALID_HANDLE; + goto exit; + } + + vpath = vp->vpath; + + if (vpath->vp_open == VXGE_HW_VP_NOT_OPEN) { + status = VXGE_HW_ERR_VPATH_NOT_OPEN; + goto exit; + } + vp_reg = vpath->vp_reg; + + __vxge_hw_pio_mem_write32_upper( + (u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->vpath_general_int_mask); + + val64 = VXGE_HW_TIM_CLR_INT_EN_VP(1 << (16 - vpath->vp_id)); + + writeq(VXGE_HW_INTR_MASK_ALL, &vp_reg->kdfcctl_errors_mask); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->general_errors_mask); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->pci_config_errors_mask); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->mrpcim_to_vpath_alarm_mask); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->srpcim_to_vpath_alarm_mask); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->vpath_ppif_int_mask); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->srpcim_msg_to_vpath_mask); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->vpath_pcipif_int_mask); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->wrdma_alarm_mask); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->prc_alarm_mask); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->xgmac_vp_int_mask); + + __vxge_hw_pio_mem_write32_upper((u32)VXGE_HW_INTR_MASK_ALL, + &vp_reg->asic_ntwk_vp_err_mask); + +exit: + return status; +} + +/** + * vxge_hw_channel_msix_mask - Mask MSIX Vector. + * @channeh: Channel for rx or tx handle + * @msix_id: MSIX ID + * + * The function masks the msix interrupt for the given msix_id + * + * Returns: 0 + */ +void vxge_hw_channel_msix_mask(struct __vxge_hw_channel *channel, int msix_id) +{ + + __vxge_hw_pio_mem_write32_upper( + (u32)vxge_bVALn(vxge_mBIT(channel->first_vp_id+(msix_id/4)), + 0, 32), + &channel->common_reg->set_msix_mask_vect[msix_id%4]); + + return; +} + +/** + * vxge_hw_channel_msix_unmask - Unmask the MSIX Vector. + * @channeh: Channel for rx or tx handle + * @msix_id: MSI ID + * + * The function unmasks the msix interrupt for the given msix_id + * + * Returns: 0 + */ +void +vxge_hw_channel_msix_unmask(struct __vxge_hw_channel *channel, int msix_id) +{ + + __vxge_hw_pio_mem_write32_upper( + (u32)vxge_bVALn(vxge_mBIT(channel->first_vp_id+(msix_id/4)), + 0, 32), + &channel->common_reg->clear_msix_mask_vect[msix_id%4]); + + return; +} + +/** + * vxge_hw_device_set_intr_type - Updates the configuration + * with new interrupt type. + * @hldev: HW device handle. + * @intr_mode: New interrupt type + */ +u32 vxge_hw_device_set_intr_type(struct __vxge_hw_device *hldev, u32 intr_mode) +{ + + if ((intr_mode != VXGE_HW_INTR_MODE_IRQLINE) && + (intr_mode != VXGE_HW_INTR_MODE_MSIX) && + (intr_mode != VXGE_HW_INTR_MODE_MSIX_ONE_SHOT) && + (intr_mode != VXGE_HW_INTR_MODE_DEF)) + intr_mode = VXGE_HW_INTR_MODE_IRQLINE; + + hldev->config.intr_mode = intr_mode; + return intr_mode; +} + +/** + * vxge_hw_device_intr_enable - Enable interrupts. + * @hldev: HW device handle. + * @op: One of the enum vxge_hw_device_intr enumerated values specifying + * the type(s) of interrupts to enable. + * + * Enable Titan interrupts. The function is to be executed the last in + * Titan initialization sequence. + * + * See also: vxge_hw_device_intr_disable() + */ +void vxge_hw_device_intr_enable(struct __vxge_hw_device *hldev) +{ + u32 i; + u64 val64; + u32 val32; + + for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) { + + if (!(hldev->vpaths_deployed & vxge_mBIT(i))) + continue; + + vxge_hw_vpath_intr_enable( + VXGE_HW_VIRTUAL_PATH_HANDLE(&hldev->virtual_paths[i])); + } + + if (hldev->config.intr_mode == VXGE_HW_INTR_MODE_IRQLINE) { + val64 = hldev->tim_int_mask0[VXGE_HW_VPATH_INTR_TX] | + hldev->tim_int_mask0[VXGE_HW_VPATH_INTR_RX]; + + if (val64 != 0) { + writeq(val64, &hldev->common_reg->tim_int_status0); + + writeq(~val64, &hldev->common_reg->tim_int_mask0); + } + + val32 = hldev->tim_int_mask1[VXGE_HW_VPATH_INTR_TX] | + hldev->tim_int_mask1[VXGE_HW_VPATH_INTR_RX]; + + if (val32 != 0) { + __vxge_hw_pio_mem_write32_upper(val32, + &hldev->common_reg->tim_int_status1); + + __vxge_hw_pio_mem_write32_upper(~val32, + &hldev->common_reg->tim_int_mask1); + } + } + + val64 = readq(&hldev->common_reg->titan_general_int_status); + + vxge_hw_device_unmask_all(hldev); + + return; +} + +/** + * vxge_hw_device_intr_disable - Disable Titan interrupts. + * @hldev: HW device handle. + * @op: One of the enum vxge_hw_device_intr enumerated values specifying + * the type(s) of interrupts to disable. + * + * Disable Titan interrupts. + * + * See also: vxge_hw_device_intr_enable() + */ +void vxge_hw_device_intr_disable(struct __vxge_hw_device *hldev) +{ + u32 i; + + vxge_hw_device_mask_all(hldev); + + /* mask all the tim interrupts */ + writeq(VXGE_HW_INTR_MASK_ALL, &hldev->common_reg->tim_int_mask0); + __vxge_hw_pio_mem_write32_upper(VXGE_HW_DEFAULT_32, + &hldev->common_reg->tim_int_mask1); + + for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) { + + if (!(hldev->vpaths_deployed & vxge_mBIT(i))) + continue; + + vxge_hw_vpath_intr_disable( + VXGE_HW_VIRTUAL_PATH_HANDLE(&hldev->virtual_paths[i])); + } + + return; +} + +/** + * vxge_hw_device_mask_all - Mask all device interrupts. + * @hldev: HW device handle. + * + * Mask all device interrupts. + * + * See also: vxge_hw_device_unmask_all() + */ +void vxge_hw_device_mask_all(struct __vxge_hw_device *hldev) +{ + u64 val64; + + val64 = VXGE_HW_TITAN_MASK_ALL_INT_ALARM | + VXGE_HW_TITAN_MASK_ALL_INT_TRAFFIC; + + __vxge_hw_pio_mem_write32_upper((u32)vxge_bVALn(val64, 0, 32), + &hldev->common_reg->titan_mask_all_int); + + return; +} + +/** + * vxge_hw_device_unmask_all - Unmask all device interrupts. + * @hldev: HW device handle. + * + * Unmask all device interrupts. + * + * See also: vxge_hw_device_mask_all() + */ +void vxge_hw_device_unmask_all(struct __vxge_hw_device *hldev) +{ + u64 val64 = 0; + + if (hldev->config.intr_mode == VXGE_HW_INTR_MODE_IRQLINE) + val64 = VXGE_HW_TITAN_MASK_ALL_INT_TRAFFIC; + + __vxge_hw_pio_mem_write32_upper((u32)vxge_bVALn(val64, 0, 32), + &hldev->common_reg->titan_mask_all_int); + + return; +} + +/** + * vxge_hw_device_flush_io - Flush io writes. + * @hldev: HW device handle. + * + * The function performs a read operation to flush io writes. + * + * Returns: void + */ +void vxge_hw_device_flush_io(struct __vxge_hw_device *hldev) +{ + u32 val32; + + val32 = readl(&hldev->common_reg->titan_general_int_status); +} + +/** + * vxge_hw_device_begin_irq - Begin IRQ processing. + * @hldev: HW device handle. + * @skip_alarms: Do not clear the alarms + * @reason: "Reason" for the interrupt, the value of Titan's + * general_int_status register. + * + * The function performs two actions, It first checks whether (shared IRQ) the + * interrupt was raised by the device. Next, it masks the device interrupts. + * + * Note: + * vxge_hw_device_begin_irq() does not flush MMIO writes through the + * bridge. Therefore, two back-to-back interrupts are potentially possible. + * + * Returns: 0, if the interrupt is not "ours" (note that in this case the + * device remain enabled). + * Otherwise, vxge_hw_device_begin_irq() returns 64bit general adapter + * status. + */ +enum vxge_hw_status vxge_hw_device_begin_irq(struct __vxge_hw_device *hldev, + u32 skip_alarms, u64 *reason) +{ + u32 i; + u64 val64; + u64 adapter_status; + u64 vpath_mask; + enum vxge_hw_status ret = VXGE_HW_OK; + + val64 = readq(&hldev->common_reg->titan_general_int_status); + + if (unlikely(!val64)) { + /* not Titan interrupt */ + *reason = 0; + ret = VXGE_HW_ERR_WRONG_IRQ; + goto exit; + } + + if (unlikely(val64 == VXGE_HW_ALL_FOXES)) { + + adapter_status = readq(&hldev->common_reg->adapter_status); + + if (adapter_status == VXGE_HW_ALL_FOXES) { + + __vxge_hw_device_handle_error(hldev, + NULL_VPID, VXGE_HW_EVENT_SLOT_FREEZE); + *reason = 0; + ret = VXGE_HW_ERR_SLOT_FREEZE; + goto exit; + } + } + + hldev->stats.sw_dev_info_stats.total_intr_cnt++; + + *reason = val64; + + vpath_mask = hldev->vpaths_deployed >> + (64 - VXGE_HW_MAX_VIRTUAL_PATHS); + + if (val64 & + VXGE_HW_TITAN_GENERAL_INT_STATUS_VPATH_TRAFFIC_INT(vpath_mask)) { + hldev->stats.sw_dev_info_stats.traffic_intr_cnt++; + + return VXGE_HW_OK; + } + + hldev->stats.sw_dev_info_stats.not_traffic_intr_cnt++; + + if (unlikely(val64 & + VXGE_HW_TITAN_GENERAL_INT_STATUS_VPATH_ALARM_INT)) { + + enum vxge_hw_status error_level = VXGE_HW_OK; + + hldev->stats.sw_dev_err_stats.vpath_alarms++; + + for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) { + + if (!(hldev->vpaths_deployed & vxge_mBIT(i))) + continue; + + ret = __vxge_hw_vpath_alarm_process( + &hldev->virtual_paths[i], skip_alarms); + + error_level = VXGE_HW_SET_LEVEL(ret, error_level); + + if (unlikely((ret == VXGE_HW_ERR_CRITICAL) || + (ret == VXGE_HW_ERR_SLOT_FREEZE))) + break; + } + + ret = error_level; + } +exit: + return ret; +} + +/* + * __vxge_hw_device_handle_link_up_ind + * @hldev: HW device handle. + * + * Link up indication handler. The function is invoked by HW when + * Titan indicates that the link is up for programmable amount of time. + */ +enum vxge_hw_status +__vxge_hw_device_handle_link_up_ind(struct __vxge_hw_device *hldev) +{ + /* + * If the previous link state is not down, return. + */ + if (hldev->link_state == VXGE_HW_LINK_UP) + goto exit; + + hldev->link_state = VXGE_HW_LINK_UP; + + /* notify driver */ + if (hldev->uld_callbacks.link_up) + hldev->uld_callbacks.link_up(hldev); +exit: + return VXGE_HW_OK; +} + +/* + * __vxge_hw_device_handle_link_down_ind + * @hldev: HW device handle. + * + * Link down indication handler. The function is invoked by HW when + * Titan indicates that the link is down. + */ +enum vxge_hw_status +__vxge_hw_device_handle_link_down_ind(struct __vxge_hw_device *hldev) +{ + /* + * If the previous link state is not down, return. + */ + if (hldev->link_state == VXGE_HW_LINK_DOWN) + goto exit; + + hldev->link_state = VXGE_HW_LINK_DOWN; + + /* notify driver */ + if (hldev->uld_callbacks.link_down) + hldev->uld_callbacks.link_down(hldev); +exit: + return VXGE_HW_OK; +} + +/** + * __vxge_hw_device_handle_error - Handle error + * @hldev: HW device + * @vp_id: Vpath Id + * @type: Error type. Please see enum vxge_hw_event{} + * + * Handle error. + */ +enum vxge_hw_status +__vxge_hw_device_handle_error( + struct __vxge_hw_device *hldev, + u32 vp_id, + enum vxge_hw_event type) +{ + switch (type) { + case VXGE_HW_EVENT_UNKNOWN: + break; + case VXGE_HW_EVENT_RESET_START: + case VXGE_HW_EVENT_RESET_COMPLETE: + case VXGE_HW_EVENT_LINK_DOWN: + case VXGE_HW_EVENT_LINK_UP: + goto out; + case VXGE_HW_EVENT_ALARM_CLEARED: + goto out; + case VXGE_HW_EVENT_ECCERR: + case VXGE_HW_EVENT_MRPCIM_ECCERR: + goto out; + case VXGE_HW_EVENT_FIFO_ERR: + case VXGE_HW_EVENT_VPATH_ERR: + case VXGE_HW_EVENT_CRITICAL_ERR: + case VXGE_HW_EVENT_SERR: + break; + case VXGE_HW_EVENT_SRPCIM_SERR: + case VXGE_HW_EVENT_MRPCIM_SERR: + goto out; + case VXGE_HW_EVENT_SLOT_FREEZE: + break; + default: + vxge_assert(0); + goto out; + } + + /* notify driver */ + if (hldev->uld_callbacks.crit_err) + hldev->uld_callbacks.crit_err( + (struct __vxge_hw_device *)hldev, + type, vp_id); +out: + + return VXGE_HW_OK; +} + +/** + * vxge_hw_device_clear_tx_rx - Acknowledge (that is, clear) the + * condition that has caused the Tx and RX interrupt. + * @hldev: HW device. + * + * Acknowledge (that is, clear) the condition that has caused + * the Tx and Rx interrupt. + * See also: vxge_hw_device_begin_irq(), + * vxge_hw_device_mask_tx_rx(), vxge_hw_device_unmask_tx_rx(). + */ +void vxge_hw_device_clear_tx_rx(struct __vxge_hw_device *hldev) +{ + + if ((hldev->tim_int_mask0[VXGE_HW_VPATH_INTR_TX] != 0) || + (hldev->tim_int_mask0[VXGE_HW_VPATH_INTR_RX] != 0)) { + writeq((hldev->tim_int_mask0[VXGE_HW_VPATH_INTR_TX] | + hldev->tim_int_mask0[VXGE_HW_VPATH_INTR_RX]), + &hldev->common_reg->tim_int_status0); + } + + if ((hldev->tim_int_mask1[VXGE_HW_VPATH_INTR_TX] != 0) || + (hldev->tim_int_mask1[VXGE_HW_VPATH_INTR_RX] != 0)) { + __vxge_hw_pio_mem_write32_upper( + (hldev->tim_int_mask1[VXGE_HW_VPATH_INTR_TX] | + hldev->tim_int_mask1[VXGE_HW_VPATH_INTR_RX]), + &hldev->common_reg->tim_int_status1); + } + + return; +} + +/* + * vxge_hw_channel_dtr_alloc - Allocate a dtr from the channel + * @channel: Channel + * @dtrh: Buffer to return the DTR pointer + * + * Allocates a dtr from the reserve array. If the reserve array is empty, + * it swaps the reserve and free arrays. + * + */ +enum vxge_hw_status +vxge_hw_channel_dtr_alloc(struct __vxge_hw_channel *channel, void **dtrh) +{ + void **tmp_arr; + + if (channel->reserve_ptr - channel->reserve_top > 0) { +_alloc_after_swap: + *dtrh = channel->reserve_arr[--channel->reserve_ptr]; + + return VXGE_HW_OK; + } + + /* switch between empty and full arrays */ + + /* the idea behind such a design is that by having free and reserved + * arrays separated we basically separated irq and non-irq parts. + * i.e. no additional lock need to be done when we free a resource */ + + if (channel->length - channel->free_ptr > 0) { + + tmp_arr = channel->reserve_arr; + channel->reserve_arr = channel->free_arr; + channel->free_arr = tmp_arr; + channel->reserve_ptr = channel->length; + channel->reserve_top = channel->free_ptr; + channel->free_ptr = channel->length; + + channel->stats->reserve_free_swaps_cnt++; + + goto _alloc_after_swap; + } + + channel->stats->full_cnt++; + + *dtrh = NULL; + return VXGE_HW_INF_OUT_OF_DESCRIPTORS; +} + +/* + * vxge_hw_channel_dtr_post - Post a dtr to the channel + * @channelh: Channel + * @dtrh: DTR pointer + * + * Posts a dtr to work array. + * + */ +void vxge_hw_channel_dtr_post(struct __vxge_hw_channel *channel, void *dtrh) +{ + vxge_assert(channel->work_arr[channel->post_index] == NULL); + + channel->work_arr[channel->post_index++] = dtrh; + + /* wrap-around */ + if (channel->post_index == channel->length) + channel->post_index = 0; +} + +/* + * vxge_hw_channel_dtr_try_complete - Returns next completed dtr + * @channel: Channel + * @dtr: Buffer to return the next completed DTR pointer + * + * Returns the next completed dtr with out removing it from work array + * + */ +void +vxge_hw_channel_dtr_try_complete(struct __vxge_hw_channel *channel, void **dtrh) +{ + vxge_assert(channel->compl_index < channel->length); + + *dtrh = channel->work_arr[channel->compl_index]; +} + +/* + * vxge_hw_channel_dtr_complete - Removes next completed dtr from the work array + * @channel: Channel handle + * + * Removes the next completed dtr from work array + * + */ +void vxge_hw_channel_dtr_complete(struct __vxge_hw_channel *channel) +{ + channel->work_arr[channel->compl_index] = NULL; + + /* wrap-around */ + if (++channel->compl_index == channel->length) + channel->compl_index = 0; + + channel->stats->total_compl_cnt++; +} + +/* + * vxge_hw_channel_dtr_free - Frees a dtr + * @channel: Channel handle + * @dtr: DTR pointer + * + * Returns the dtr to free array + * + */ +void vxge_hw_channel_dtr_free(struct __vxge_hw_channel *channel, void *dtrh) +{ + channel->free_arr[--channel->free_ptr] = dtrh; +} + +/* + * vxge_hw_channel_dtr_count + * @channel: Channel handle. Obtained via vxge_hw_channel_open(). + * + * Retreive number of DTRs available. This function can not be called + * from data path. ring_initial_replenishi() is the only user. + */ +int vxge_hw_channel_dtr_count(struct __vxge_hw_channel *channel) +{ + return (channel->reserve_ptr - channel->reserve_top) + + (channel->length - channel->free_ptr); +} + +/** + * vxge_hw_ring_rxd_reserve - Reserve ring descriptor. + * @ring: Handle to the ring object used for receive + * @rxdh: Reserved descriptor. On success HW fills this "out" parameter + * with a valid handle. + * + * Reserve Rx descriptor for the subsequent filling-in driver + * and posting on the corresponding channel (@channelh) + * via vxge_hw_ring_rxd_post(). + * + * Returns: VXGE_HW_OK - success. + * VXGE_HW_INF_OUT_OF_DESCRIPTORS - Currently no descriptors available. + * + */ +enum vxge_hw_status vxge_hw_ring_rxd_reserve(struct __vxge_hw_ring *ring, + void **rxdh) +{ + enum vxge_hw_status status; + struct __vxge_hw_channel *channel; + + channel = &ring->channel; + + status = vxge_hw_channel_dtr_alloc(channel, rxdh); + + if (status == VXGE_HW_OK) { + struct vxge_hw_ring_rxd_1 *rxdp = + (struct vxge_hw_ring_rxd_1 *)*rxdh; + + rxdp->control_0 = rxdp->control_1 = 0; + } + + return status; +} + +/** + * vxge_hw_ring_rxd_free - Free descriptor. + * @ring: Handle to the ring object used for receive + * @rxdh: Descriptor handle. + * + * Free the reserved descriptor. This operation is "symmetrical" to + * vxge_hw_ring_rxd_reserve. The "free-ing" completes the descriptor's + * lifecycle. + * + * After free-ing (see vxge_hw_ring_rxd_free()) the descriptor again can + * be: + * + * - reserved (vxge_hw_ring_rxd_reserve); + * + * - posted (vxge_hw_ring_rxd_post); + * + * - completed (vxge_hw_ring_rxd_next_completed); + * + * - and recycled again (vxge_hw_ring_rxd_free). + * + * For alternative state transitions and more details please refer to + * the design doc. + * + */ +void vxge_hw_ring_rxd_free(struct __vxge_hw_ring *ring, void *rxdh) +{ + struct __vxge_hw_channel *channel; + + channel = &ring->channel; + + vxge_hw_channel_dtr_free(channel, rxdh); + +} + +/** + * vxge_hw_ring_rxd_pre_post - Prepare rxd and post + * @ring: Handle to the ring object used for receive + * @rxdh: Descriptor handle. + * + * This routine prepares a rxd and posts + */ +void vxge_hw_ring_rxd_pre_post(struct __vxge_hw_ring *ring, void *rxdh) +{ + struct __vxge_hw_channel *channel; + + channel = &ring->channel; + + vxge_hw_channel_dtr_post(channel, rxdh); +} + +/** + * vxge_hw_ring_rxd_post_post - Process rxd after post. + * @ring: Handle to the ring object used for receive + * @rxdh: Descriptor handle. + * + * Processes rxd after post + */ +void vxge_hw_ring_rxd_post_post(struct __vxge_hw_ring *ring, void *rxdh) +{ + struct vxge_hw_ring_rxd_1 *rxdp = (struct vxge_hw_ring_rxd_1 *)rxdh; + struct __vxge_hw_channel *channel; + + channel = &ring->channel; + + rxdp->control_0 |= VXGE_HW_RING_RXD_LIST_OWN_ADAPTER; + + if (ring->stats->common_stats.usage_cnt > 0) + ring->stats->common_stats.usage_cnt--; +} + +/** + * vxge_hw_ring_rxd_post - Post descriptor on the ring. + * @ring: Handle to the ring object used for receive + * @rxdh: Descriptor obtained via vxge_hw_ring_rxd_reserve(). + * + * Post descriptor on the ring. + * Prior to posting the descriptor should be filled in accordance with + * Host/Titan interface specification for a given service (LL, etc.). + * + */ +void vxge_hw_ring_rxd_post(struct __vxge_hw_ring *ring, void *rxdh) +{ + struct vxge_hw_ring_rxd_1 *rxdp = (struct vxge_hw_ring_rxd_1 *)rxdh; + struct __vxge_hw_channel *channel; + + channel = &ring->channel; + + wmb(); + rxdp->control_0 |= VXGE_HW_RING_RXD_LIST_OWN_ADAPTER; + + vxge_hw_channel_dtr_post(channel, rxdh); + + if (ring->stats->common_stats.usage_cnt > 0) + ring->stats->common_stats.usage_cnt--; +} + +/** + * vxge_hw_ring_rxd_post_post_wmb - Process rxd after post with memory barrier. + * @ring: Handle to the ring object used for receive + * @rxdh: Descriptor handle. + * + * Processes rxd after post with memory barrier. + */ +void vxge_hw_ring_rxd_post_post_wmb(struct __vxge_hw_ring *ring, void *rxdh) +{ + struct __vxge_hw_channel *channel; + + channel = &ring->channel; + + wmb(); + vxge_hw_ring_rxd_post_post(ring, rxdh); +} + +/** + * vxge_hw_ring_rxd_next_completed - Get the _next_ completed descriptor. + * @ring: Handle to the ring object used for receive + * @rxdh: Descriptor handle. Returned by HW. + * @t_code: Transfer code, as per Titan User Guide, + * Receive Descriptor Format. Returned by HW. + * + * Retrieve the _next_ completed descriptor. + * HW uses ring callback (*vxge_hw_ring_callback_f) to notifiy + * driver of new completed descriptors. After that + * the driver can use vxge_hw_ring_rxd_next_completed to retrieve the rest + * completions (the very first completion is passed by HW via + * vxge_hw_ring_callback_f). + * + * Implementation-wise, the driver is free to call + * vxge_hw_ring_rxd_next_completed either immediately from inside the + * ring callback, or in a deferred fashion and separate (from HW) + * context. + * + * Non-zero @t_code means failure to fill-in receive buffer(s) + * of the descriptor. + * For instance, parity error detected during the data transfer. + * In this case Titan will complete the descriptor and indicate + * for the host that the received data is not to be used. + * For details please refer to Titan User Guide. + * + * Returns: VXGE_HW_OK - success. + * VXGE_HW_INF_NO_MORE_COMPLETED_DESCRIPTORS - No completed descriptors + * are currently available for processing. + * + * See also: vxge_hw_ring_callback_f{}, + * vxge_hw_fifo_rxd_next_completed(), enum vxge_hw_status{}. + */ +enum vxge_hw_status vxge_hw_ring_rxd_next_completed( + struct __vxge_hw_ring *ring, void **rxdh, u8 *t_code) +{ + struct __vxge_hw_channel *channel; + struct vxge_hw_ring_rxd_1 *rxdp; + enum vxge_hw_status status = VXGE_HW_OK; + + channel = &ring->channel; + + vxge_hw_channel_dtr_try_complete(channel, rxdh); + + rxdp = (struct vxge_hw_ring_rxd_1 *)*rxdh; + if (rxdp == NULL) { + status = VXGE_HW_INF_NO_MORE_COMPLETED_DESCRIPTORS; + goto exit; + } + + /* check whether it is not the end */ + if (!(rxdp->control_0 & VXGE_HW_RING_RXD_LIST_OWN_ADAPTER)) { + + vxge_assert(((struct vxge_hw_ring_rxd_1 *)rxdp)->host_control != + 0); + + ++ring->cmpl_cnt; + vxge_hw_channel_dtr_complete(channel); + + *t_code = (u8)VXGE_HW_RING_RXD_T_CODE_GET(rxdp->control_0); + + vxge_assert(*t_code != VXGE_HW_RING_RXD_T_CODE_UNUSED); + + ring->stats->common_stats.usage_cnt++; + if (ring->stats->common_stats.usage_max < + ring->stats->common_stats.usage_cnt) + ring->stats->common_stats.usage_max = + ring->stats->common_stats.usage_cnt; + + status = VXGE_HW_OK; + goto exit; + } + + /* reset it. since we don't want to return + * garbage to the driver */ + *rxdh = NULL; + status = VXGE_HW_INF_NO_MORE_COMPLETED_DESCRIPTORS; +exit: + return status; +} + +/** + * vxge_hw_ring_handle_tcode - Handle transfer code. + * @ring: Handle to the ring object used for receive + * @rxdh: Descriptor handle. + * @t_code: One of the enumerated (and documented in the Titan user guide) + * "transfer codes". + * + * Handle descriptor's transfer code. The latter comes with each completed + * descriptor. + * + * Returns: one of the enum vxge_hw_status{} enumerated types. + * VXGE_HW_OK - for success. + * VXGE_HW_ERR_CRITICAL - when encounters critical error. + */ +enum vxge_hw_status vxge_hw_ring_handle_tcode( + struct __vxge_hw_ring *ring, void *rxdh, u8 t_code) +{ + struct __vxge_hw_channel *channel; + enum vxge_hw_status status = VXGE_HW_OK; + + channel = &ring->channel; + + /* If the t_code is not supported and if the + * t_code is other than 0x5 (unparseable packet + * such as unknown UPV6 header), Drop it !!! + */ + + if (t_code == 0 || t_code == 5) { + status = VXGE_HW_OK; + goto exit; + } + + if (t_code > 0xF) { + status = VXGE_HW_ERR_INVALID_TCODE; + goto exit; + } + + ring->stats->rxd_t_code_err_cnt[t_code]++; +exit: + return status; +} + +/** + * __vxge_hw_non_offload_db_post - Post non offload doorbell + * + * @fifo: fifohandle + * @txdl_ptr: The starting location of the TxDL in host memory + * @num_txds: The highest TxD in this TxDL (0 to 255 means 1 to 256) + * @no_snoop: No snoop flags + * + * This function posts a non-offload doorbell to doorbell FIFO + * + */ +static void __vxge_hw_non_offload_db_post(struct __vxge_hw_fifo *fifo, + u64 txdl_ptr, u32 num_txds, u32 no_snoop) +{ + struct __vxge_hw_channel *channel; + + channel = &fifo->channel; + + writeq(VXGE_HW_NODBW_TYPE(VXGE_HW_NODBW_TYPE_NODBW) | + VXGE_HW_NODBW_LAST_TXD_NUMBER(num_txds) | + VXGE_HW_NODBW_GET_NO_SNOOP(no_snoop), + &fifo->nofl_db->control_0); + + wmb(); + + writeq(txdl_ptr, &fifo->nofl_db->txdl_ptr); + wmb(); + +} + +/** + * vxge_hw_fifo_free_txdl_count_get - returns the number of txdls available in + * the fifo + * @fifoh: Handle to the fifo object used for non offload send + */ +u32 vxge_hw_fifo_free_txdl_count_get(struct __vxge_hw_fifo *fifoh) +{ + return vxge_hw_channel_dtr_count(&fifoh->channel); +} + +/** + * vxge_hw_fifo_txdl_reserve - Reserve fifo descriptor. + * @fifoh: Handle to the fifo object used for non offload send + * @txdlh: Reserved descriptor. On success HW fills this "out" parameter + * with a valid handle. + * @txdl_priv: Buffer to return the pointer to per txdl space + * + * Reserve a single TxDL (that is, fifo descriptor) + * for the subsequent filling-in by driver) + * and posting on the corresponding channel (@channelh) + * via vxge_hw_fifo_txdl_post(). + * + * Note: it is the responsibility of driver to reserve multiple descriptors + * for lengthy (e.g., LSO) transmit operation. A single fifo descriptor + * carries up to configured number (fifo.max_frags) of contiguous buffers. + * + * Returns: VXGE_HW_OK - success; + * VXGE_HW_INF_OUT_OF_DESCRIPTORS - Currently no descriptors available + * + */ +enum vxge_hw_status vxge_hw_fifo_txdl_reserve( + struct __vxge_hw_fifo *fifo, + void **txdlh, void **txdl_priv) +{ + struct __vxge_hw_channel *channel; + enum vxge_hw_status status; + int i; + + channel = &fifo->channel; + + status = vxge_hw_channel_dtr_alloc(channel, txdlh); + + if (status == VXGE_HW_OK) { + struct vxge_hw_fifo_txd *txdp = + (struct vxge_hw_fifo_txd *)*txdlh; + struct __vxge_hw_fifo_txdl_priv *priv; + + priv = __vxge_hw_fifo_txdl_priv(fifo, txdp); + + /* reset the TxDL's private */ + priv->align_dma_offset = 0; + priv->align_vaddr_start = priv->align_vaddr; + priv->align_used_frags = 0; + priv->frags = 0; + priv->alloc_frags = fifo->config->max_frags; + priv->next_txdl_priv = NULL; + + *txdl_priv = (void *)(size_t)txdp->host_control; + + for (i = 0; i < fifo->config->max_frags; i++) { + txdp = ((struct vxge_hw_fifo_txd *)*txdlh) + i; + txdp->control_0 = txdp->control_1 = 0; + } + } + + return status; +} + +/** + * vxge_hw_fifo_txdl_buffer_set - Set transmit buffer pointer in the + * descriptor. + * @fifo: Handle to the fifo object used for non offload send + * @txdlh: Descriptor handle. + * @frag_idx: Index of the data buffer in the caller's scatter-gather list + * (of buffers). + * @dma_pointer: DMA address of the data buffer referenced by @frag_idx. + * @size: Size of the data buffer (in bytes). + * + * This API is part of the preparation of the transmit descriptor for posting + * (via vxge_hw_fifo_txdl_post()). The related "preparation" APIs include + * vxge_hw_fifo_txdl_mss_set() and vxge_hw_fifo_txdl_cksum_set_bits(). + * All three APIs fill in the fields of the fifo descriptor, + * in accordance with the Titan specification. + * + */ +void vxge_hw_fifo_txdl_buffer_set(struct __vxge_hw_fifo *fifo, + void *txdlh, u32 frag_idx, + dma_addr_t dma_pointer, u32 size) +{ + struct __vxge_hw_fifo_txdl_priv *txdl_priv; + struct vxge_hw_fifo_txd *txdp, *txdp_last; + struct __vxge_hw_cha |