diff options
Diffstat (limited to 'drivers/net/ethernet/neterion/vxge/vxge-traffic.c')
| -rw-r--r-- | drivers/net/ethernet/neterion/vxge/vxge-traffic.c | 2514 |
1 files changed, 2514 insertions, 0 deletions
diff --git a/drivers/net/ethernet/neterion/vxge/vxge-traffic.c b/drivers/net/ethernet/neterion/vxge/vxge-traffic.c new file mode 100644 index 00000000000..ad64ce0afe3 --- /dev/null +++ b/drivers/net/ethernet/neterion/vxge/vxge-traffic.c @@ -0,0 +1,2514 @@ +/****************************************************************************** + * 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 Exar Corp's X3100 Series 10GbE PCIe I/O + * Virtualized Server Adapter. + * Copyright(c) 2002-2010 Exar Corp. + ******************************************************************************/ +#include <linux/etherdevice.h> +#include <linux/prefetch.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_FIFO2_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; +} + +void vxge_hw_vpath_tti_ci_set(struct __vxge_hw_fifo *fifo) +{ + struct vxge_hw_vpath_reg __iomem *vp_reg; + struct vxge_hw_vp_config *config; + u64 val64; + + if (fifo->config->enable != VXGE_HW_FIFO_ENABLE) + return; + + vp_reg = fifo->vp_reg; + config = container_of(fifo->config, struct vxge_hw_vp_config, fifo); + + if (config->tti.timer_ci_en != VXGE_HW_TIM_TIMER_CI_ENABLE) { + config->tti.timer_ci_en = VXGE_HW_TIM_TIMER_CI_ENABLE; + val64 = readq(&vp_reg->tim_cfg1_int_num[VXGE_HW_VPATH_INTR_TX]); + val64 |= VXGE_HW_TIM_CFG1_INT_NUM_TIMER_CI; + fifo->tim_tti_cfg1_saved = val64; + writeq(val64, &vp_reg->tim_cfg1_int_num[VXGE_HW_VPATH_INTR_TX]); + } +} + +void vxge_hw_vpath_dynamic_rti_ci_set(struct __vxge_hw_ring *ring) +{ + u64 val64 = ring->tim_rti_cfg1_saved; + + val64 |= VXGE_HW_TIM_CFG1_INT_NUM_TIMER_CI; + ring->tim_rti_cfg1_saved = val64; + writeq(val64, &ring->vp_reg->tim_cfg1_int_num[VXGE_HW_VPATH_INTR_RX]); +} + +void vxge_hw_vpath_dynamic_tti_rtimer_set(struct __vxge_hw_fifo *fifo) +{ + u64 val64 = fifo->tim_tti_cfg3_saved; + u64 timer = (fifo->rtimer * 1000) / 272; + + val64 &= ~VXGE_HW_TIM_CFG3_INT_NUM_RTIMER_VAL(0x3ffffff); + if (timer) + val64 |= VXGE_HW_TIM_CFG3_INT_NUM_RTIMER_VAL(timer) | + VXGE_HW_TIM_CFG3_INT_NUM_RTIMER_EVENT_SF(5); + + writeq(val64, &fifo->vp_reg->tim_cfg3_int_num[VXGE_HW_VPATH_INTR_TX]); + /* tti_cfg3_saved is not updated again because it is + * initialized at one place only - init time. + */ +} + +void vxge_hw_vpath_dynamic_rti_rtimer_set(struct __vxge_hw_ring *ring) +{ + u64 val64 = ring->tim_rti_cfg3_saved; + u64 timer = (ring->rtimer * 1000) / 272; + + val64 &= ~VXGE_HW_TIM_CFG3_INT_NUM_RTIMER_VAL(0x3ffffff); + if (timer) + val64 |= VXGE_HW_TIM_CFG3_INT_NUM_RTIMER_VAL(timer) | + VXGE_HW_TIM_CFG3_INT_NUM_RTIMER_EVENT_SF(4); + + writeq(val64, &ring->vp_reg->tim_cfg3_int_num[VXGE_HW_VPATH_INTR_RX]); + /* rti_cfg3_saved is not updated again because it is + * initialized at one place only - init time. + */ +} + +/** + * 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(msix_id >> 2), 0, 32), + &channel->common_reg->set_msix_mask_vect[msix_id%4]); +} + +/** + * 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(msix_id >> 2), 0, 32), + &channel->common_reg->clear_msix_mask_vect[msix_id%4]); +} + +/** + * vxge_hw_channel_msix_clear - Unmask the MSIX Vector. + * @channel: Channel for rx or tx handle + * @msix_id: MSI ID + * + * The function unmasks the msix interrupt for the given msix_id + * if configured in MSIX oneshot mode + * + * Returns: 0 + */ +void vxge_hw_channel_msix_clear(struct __vxge_hw_channel *channel, int msix_id) +{ + __vxge_hw_pio_mem_write32_upper( + (u32) vxge_bVALn(vxge_mBIT(msix_id >> 2), 0, 32), + &channel->common_reg->clr_msix_one_shot_vec[msix_id % 4]); +} + +/** + * 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; + + vxge_hw_device_mask_all(hldev); + + 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); +} + +/** + * 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])); + } +} + +/** + * 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); +} + +/** + * 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); +} + +/** + * 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_handle_error - Handle error + * @hldev: HW device + * @vp_id: Vpath Id + * @type: Error type. Please see enum vxge_hw_event{} + * + * Handle error. + */ +static 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_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. + */ +static 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_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. + */ +static 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_vpath_alarm_process - Process Alarms. + * @vpath: Virtual Path. + * @skip_alarms: Do not clear the alarms + * + * Process vpath alarms. + * + */ +static enum vxge_hw_status +__vxge_hw_vpath_alarm_process(struct __vxge_hw_virtualpath *vpath, + u32 skip_alarms) +{ + u64 val64; + u64 alarm_status; + u64 pic_status; + struct __vxge_hw_device *hldev = NULL; + enum vxge_hw_event alarm_event = VXGE_HW_EVENT_UNKNOWN; + u64 mask64; + struct vxge_hw_vpath_stats_sw_info *sw_stats; + struct vxge_hw_vpath_reg __iomem *vp_reg; + + if (vpath == NULL) { + alarm_event = VXGE_HW_SET_LEVEL(VXGE_HW_EVENT_UNKNOWN, + alarm_event); + goto out2; + } + + hldev = vpath->hldev; + vp_reg = vpath->vp_reg; + alarm_status = readq(&vp_reg->vpath_general_int_status); + + if (alarm_status == VXGE_HW_ALL_FOXES) { + alarm_event = VXGE_HW_SET_LEVEL(VXGE_HW_EVENT_SLOT_FREEZE, + alarm_event); + goto out; + } + + sw_stats = vpath->sw_stats; + + if (alarm_status & ~( + VXGE_HW_VPATH_GENERAL_INT_STATUS_PIC_INT | + VXGE_HW_VPATH_GENERAL_INT_STATUS_PCI_INT | + VXGE_HW_VPATH_GENERAL_INT_STATUS_WRDMA_INT | + VXGE_HW_VPATH_GENERAL_INT_STATUS_XMAC_INT)) { + sw_stats->error_stats.unknown_alarms++; + + alarm_event = VXGE_HW_SET_LEVEL(VXGE_HW_EVENT_UNKNOWN, + alarm_event); + goto out; + } + + if (alarm_status & VXGE_HW_VPATH_GENERAL_INT_STATUS_XMAC_INT) { + + val64 = readq(&vp_reg->xgmac_vp_int_status); + + if (val64 & + VXGE_HW_XGMAC_VP_INT_STATUS_ASIC_NTWK_VP_ERR_ASIC_NTWK_VP_INT) { + + val64 = readq(&vp_reg->asic_ntwk_vp_err_reg); + + if (((val64 & + VXGE_HW_ASIC_NW_VP_ERR_REG_XMACJ_STN_FLT) && + (!(val64 & + VXGE_HW_ASIC_NW_VP_ERR_REG_XMACJ_STN_OK))) || + ((val64 & + VXGE_HW_ASIC_NW_VP_ERR_REG_XMACJ_STN_FLT_OCCURR) && + (!(val64 & + VXGE_HW_ASIC_NW_VP_ERR_REG_XMACJ_STN_OK_OCCURR) + ))) { + sw_stats->error_stats.network_sustained_fault++; + + writeq( + VXGE_HW_ASIC_NW_VP_ERR_REG_XMACJ_STN_FLT, + &vp_reg->asic_ntwk_vp_err_mask); + + __vxge_hw_device_handle_link_down_ind(hldev); + alarm_event = VXGE_HW_SET_LEVEL( + VXGE_HW_EVENT_LINK_DOWN, alarm_event); + } + + if (((val64 & + VXGE_HW_ASIC_NW_VP_ERR_REG_XMACJ_STN_OK) && + (!(val64 & + VXGE_HW_ASIC_NW_VP_ERR_REG_XMACJ_STN_FLT))) || + ((val64 & + VXGE_HW_ASIC_NW_VP_ERR_REG_XMACJ_STN_OK_OCCURR) && + (!(val64 & + VXGE_HW_ASIC_NW_VP_ERR_REG_XMACJ_STN_FLT_OCCURR) + ))) { + + sw_stats->error_stats.network_sustained_ok++; + + writeq( + VXGE_HW_ASIC_NW_VP_ERR_REG_XMACJ_STN_OK, + &vp_reg->asic_ntwk_vp_err_mask); + + __vxge_hw_device_handle_link_up_ind(hldev); + alarm_event = VXGE_HW_SET_LEVEL( + VXGE_HW_EVENT_LINK_UP, alarm_event); + } + + writeq(VXGE_HW_INTR_MASK_ALL, + &vp_reg->asic_ntwk_vp_err_reg); + + alarm_event = VXGE_HW_SET_LEVEL( + VXGE_HW_EVENT_ALARM_CLEARED, alarm_event); + + if (skip_alarms) + return VXGE_HW_OK; + } + } + + if (alarm_status & VXGE_HW_VPATH_GENERAL_INT_STATUS_PIC_INT) { + + pic_status = readq(&vp_reg->vpath_ppif_int_status); + + if (pic_status & + VXGE_HW_VPATH_PPIF_INT_STATUS_GENERAL_ERRORS_GENERAL_INT) { + + val64 = readq(&vp_reg->general_errors_reg); + mask64 = readq(&vp_reg->general_errors_mask); + + if ((val64 & + VXGE_HW_GENERAL_ERRORS_REG_INI_SERR_DET) & + ~mask64) { + sw_stats->error_stats.ini_serr_det++; + + alarm_event = VXGE_HW_SET_LEVEL( + VXGE_HW_EVENT_SERR, alarm_event); + } + + if ((val64 & + VXGE_HW_GENERAL_ERRORS_REG_DBLGEN_FIFO0_OVRFLOW) & + ~mask64) { + sw_stats->error_stats.dblgen_fifo0_overflow++; + + alarm_event = VXGE_HW_SET_LEVEL( + VXGE_HW_EVENT_FIFO_ERR, alarm_event); + } + + if ((val64 & + VXGE_HW_GENERAL_ERRORS_REG_STATSB_PIF_CHAIN_ERR) & + ~mask64) + sw_stats->error_stats.statsb_pif_chain_error++; + + if ((val64 & + VXGE_HW_GENERAL_ERRORS_REG_STATSB_DROP_TIMEOUT_REQ) & + ~mask64) + sw_stats->error_stats.statsb_drop_timeout++; + + if ((val64 & + VXGE_HW_GENERAL_ERRORS_REG_TGT_ILLEGAL_ACCESS) & + ~mask64) + sw_stats->error_stats.target_illegal_access++; + + if (!skip_alarms) { + writeq(VXGE_HW_INTR_MASK_ALL, + &vp_reg->general_errors_reg); + alarm_event = VXGE_HW_SET_LEVEL( + VXGE_HW_EVENT_ALARM_CLEARED, + alarm_event); + } + } + + if (pic_status & + VXGE_HW_VPATH_PPIF_INT_STATUS_KDFCCTL_ERRORS_KDFCCTL_INT) { + + val64 = readq(&vp_reg->kdfcctl_errors_reg); + mask64 = readq(&vp_reg->kdfcctl_errors_mask); + + if ((val64 & + VXGE_HW_KDFCCTL_ERRORS_REG_KDFCCTL_FIFO0_OVRWR) & + ~mask64) { + sw_stats->error_stats.kdfcctl_fifo0_overwrite++; + + alarm_event = VXGE_HW_SET_LEVEL( + VXGE_HW_EVENT_FIFO_ERR, + alarm_event); + } + + if ((val64 & + VXGE_HW_KDFCCTL_ERRORS_REG_KDFCCTL_FIFO0_POISON) & + ~mask64) { + sw_stats->error_stats.kdfcctl_fifo0_poison++; + + alarm_event = VXGE_HW_SET_LEVEL( + VXGE_HW_EVENT_FIFO_ERR, + alarm_event); + } + + if ((val64 & + VXGE_HW_KDFCCTL_ERRORS_REG_KDFCCTL_FIFO0_DMA_ERR) & + ~mask64) { + sw_stats->error_stats.kdfcctl_fifo0_dma_error++; + + alarm_event = VXGE_HW_SET_LEVEL( + VXGE_HW_EVENT_FIFO_ERR, + alarm_event); + } + + if (!skip_alarms) { + writeq(VXGE_HW_INTR_MASK_ALL, + &vp_reg->kdfcctl_errors_reg); + alarm_event = VXGE_HW_SET_LEVEL( + VXGE_HW_EVENT_ALARM_CLEARED, + alarm_event); + } + } + + } + + if (alarm_status & VXGE_HW_VPATH_GENERAL_INT_STATUS_WRDMA_INT) { + + val64 = readq(&vp_reg->wrdma_alarm_status); + + if (val64 & VXGE_HW_WRDMA_ALARM_STATUS_PRC_ALARM_PRC_INT) { + + val64 = readq(&vp_reg->prc_alarm_reg); + mask64 = readq(&vp_reg->prc_alarm_mask); + + if ((val64 & VXGE_HW_PRC_ALARM_REG_PRC_RING_BUMP)& + ~mask64) + sw_stats->error_stats.prc_ring_bumps++; + + if ((val64 & VXGE_HW_PRC_ALARM_REG_PRC_RXDCM_SC_ERR) & + ~mask64) { + sw_stats->error_stats.prc_rxdcm_sc_err++; + + alarm_event = VXGE_HW_SET_LEVEL( + VXGE_HW_EVENT_VPATH_ERR, + alarm_event); + } + + if ((val64 & VXGE_HW_PRC_ALARM_REG_PRC_RXDCM_SC_ABORT) + & ~mask64) { + sw_stats->error_stats.prc_rxdcm_sc_abort++; + + alarm_event = VXGE_HW_SET_LEVEL( + VXGE_HW_EVENT_VPATH_ERR, + alarm_event); + } + + if ((val64 & VXGE_HW_PRC_ALARM_REG_PRC_QUANTA_SIZE_ERR) + & ~mask64) { + sw_stats->error_stats.prc_quanta_size_err++; + + alarm_event = VXGE_HW_SET_LEVEL( + VXGE_HW_EVENT_VPATH_ERR, + alarm_event); + } + + if (!skip_alarms) { + writeq(VXGE_HW_INTR_MASK_ALL, + &vp_reg->prc_alarm_reg); + alarm_event = VXGE_HW_SET_LEVEL( + VXGE_HW_EVENT_ALARM_CLEARED, + alarm_event); + } + } + } +out: + hldev->stats.sw_dev_err_stats.vpath_alarms++; +out2: + if ((alarm_event == VXGE_HW_EVENT_ALARM_CLEARED) || + (alarm_event == VXGE_HW_EVENT_UNKNOWN)) + return VXGE_HW_OK; + + __vxge_hw_device_handle_error(hldev, vpath->vp_id, alarm_event); + + if (alarm_event == VXGE_HW_EVENT_SERR) + return VXGE_HW_ERR_CRITICAL; + + return (alarm_event == VXGE_HW_EVENT_SLOT_FREEZE) ? + VXGE_HW_ERR_SLOT_FREEZE : + (alarm_event == VXGE_HW_EVENT_FIFO_ERR) ? VXGE_HW_ERR_FIFO : + VXGE_HW_ERR_VPATH; +} + +/** + * 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_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); + } +} + +/* + * 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. + * + */ +static 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. + * + */ +static 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]; + prefetch(*dtrh); +} + +/* + * 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(). + * + * Retrieve 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) +{ + 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; + u64 control_0, own; + + channel = &ring->channel; + + vxge_hw_channel_dtr_try_complete(channel, rxdh); + + rxdp = *rxdh; + if (rxdp == NULL) { + status = VXGE_HW_INF_NO_MORE_COMPLETED_DESCRIPTORS; + goto exit; + } + + control_0 = rxdp->control_0; + own = control_0 & VXGE_HW_RING_RXD_LIST_OWN_ADAPTER; + *t_code = (u8)VXGE_HW_RING_RXD_T_CODE_GET(control_0); + + /* check whether it is not the end */ + if (!own || *t_code == VXGE_HW_RING_T_CODE_FRM_DROP) { + + vxge_assert(((struct vxge_hw_ring_rxd_1 *)rxdp)->host_control != + 0); + + ++ring->cmpl_cnt; + vxge_hw_channel_dtr_complete(channel); + + 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 == VXGE_HW_RING_T_CODE_OK || + t_code == VXGE_HW_RING_T_CODE_L3_PKT_ERR) { + status = VXGE_HW_OK; + goto exit; + } + + if (t_code > VXGE_HW_RING_T_CODE_MULTI_ERR) { + 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); + + mmiowb(); + + writeq(txdl_ptr, &fifo->nofl_db->txdl_ptr); + + mmiowb(); +} + +/** + * 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_channel *channel; + + channel = &fifo->channel; + + txdl_priv = __vxge_hw_fifo_txdl_priv(fifo, txdlh); + txdp = (struct vxge_hw_fifo_txd *)txdlh + txdl_priv->frags; + + if (frag_idx != 0) + txdp->control_0 = txdp->control_1 = 0; + else { + txdp->control_0 |= VXGE_HW_FIFO_TXD_GATHER_CODE( + VXGE_HW_FIFO_TXD_GATHER_CODE_FIRST); + txdp->control_1 |= fifo->interrupt_type; + txdp->control_1 |= VXGE_HW_FIFO_TXD_INT_NUMBER( + fifo->tx_intr_num); + if (txdl_priv->frags) { + txdp_last = (struct vxge_hw_fifo_txd *)txdlh + + (txdl_priv->frags - 1); + txdp_last->control_0 |= VXGE_HW_FIFO_TXD_GATHER_CODE( + VXGE_HW_FIFO_TXD_GATHER_CODE_LAST); + } + } + + vxge_assert(frag_idx < txdl_priv->alloc_frags); + + txdp->buffer_pointer = (u64)dma_pointer; + txdp->control_0 |= VXGE_HW_FIFO_TXD_BUFFER_SIZE(size); + fifo->stats->total_buffers++; + txdl_priv->frags++; +} + +/** + * vxge_hw_fifo_txdl_post - Post descriptor on the fifo channel. + * @fifo: Handle to the fifo object used for non offload send + * @txdlh: Descriptor obtained via vxge_hw_fifo_txdl_reserve() + * @frags: Number of contiguous buffers that are part of a single + * transmit operation. + * + * Post descriptor on the 'fifo' type channel for transmission. + * Prior to posting the descriptor should be filled in accordance with + * Host/Titan interface specification for a given service (LL, etc.). + * + */ +void vxge_hw_fifo_txdl_post(struct __vxge_hw_fifo *fifo, void *txdlh) +{ + struct __vxge_hw_fifo_txdl_priv *txdl_priv; + struct vxge_hw_fifo_txd *txdp_last; + struct vxge_hw_fifo_txd *txdp_first; + struct __vxge_hw_channel *channel; + + channel = &fifo->channel; + + txdl_priv = __vxge_hw_fifo_txdl_priv(fifo, txdlh); + txdp_first = txdlh; + + txdp_last = (struct vxge_hw_fifo_txd *)txdlh + (txdl_priv->frags - 1); + txdp_last->control_0 |= + VXGE_HW_FIFO_TXD_GATHER_CODE(VXGE_HW_FIFO_TXD_GATHER_CODE_LAST); + txdp_first->control_0 |= VXGE_HW_FIFO_TXD_LIST_OWN_ADAPTER; + + vxge_hw_channel_dtr_post(&fifo->channel, txdlh); + + __vxge_hw_non_offload_db_post(fifo, + (u64)txdl_priv->dma_addr, + txdl_priv->frags - 1, + fifo->no_snoop_bits); + + fifo->stats->total_posts++; + fifo->stats->common_stats.usage_cnt++; + if (fifo->stats->common_stats.usage_max < + fifo->stats->common_stats.usage_cnt) + fifo->stats->common_stats.usage_max = + fifo->stats->common_stats.usage_cnt; +} + +/** + * vxge_hw_fifo_txdl_next_completed - Retrieve next completed descriptor. + * @fifo: Handle to the fifo object used for non offload send + * @txdlh: Descriptor handle. Returned by HW. + * @t_code: Transfer code, as per Titan User Guide, + * Transmit Descriptor Format. + * Returned by HW. + * + * Retrieve the _next_ completed descriptor. + * HW uses channel callback (*vxge_hw_channel_callback_f) to notifiy + * driver of new completed descriptors. After that + * the driver can use vxge_hw_fifo_txdl_next_completed to retrieve the rest + * completions (the very first completion is passed by HW via + * vxge_hw_channel_callback_f). + * + * Implementation-wise, the driver is free to call + * vxge_hw_fifo_txdl_next_completed either immediately from inside the + * channel callback, or in a deferred fashion and separate (from HW) + * context. + * + * Non-zero @t_code means failure to process the descriptor. + * The failure could happen, for instance, when the link is + * down, in which case Titan completes the descriptor because it + * is not able to send the data out. + * + * For details please refer to Titan User Guide. + * + * Returns: VXGE_HW_OK - success. + * VXGE_HW_INF_NO_MORE_COMPLETED_DESCRIPTORS - No completed descriptors + * are currently available for processing. + * + */ +enum vxge_hw_status vxge_hw_fifo_txdl_next_completed( + struct __vxge_hw_fifo *fifo, void **txdlh, + enum vxge_hw_fifo_tcode *t_code) +{ + struct __vxge_hw_channel *channel; + struct vxge_hw_fifo_txd *txdp; + enum vxge_hw_status status = VXGE_HW_OK; + + channel = &fifo->channel; + + vxge_hw_channel_dtr_try_complete(channel, txdlh); + + txdp = *txdlh; + if (txdp == NULL) { + status = VXGE_HW_INF_NO_MORE_COMPLETED_DESCRIPTORS; + goto exit; + } + + /* check whether host owns it */ + if (!(txdp->control_0 & VXGE_HW_FIFO_TXD_LIST_OWN_ADAPTER)) { + + vxge_assert(txdp->host_control != 0); + + vxge_hw_channel_dtr_complete(channel); + + *t_code = (u8)VXGE_HW_FIFO_TXD_T_CODE_GET(txdp->control_0); + + if (fifo->stats->common_stats.usage_cnt > 0) + fifo->stats->common_stats.usage_cnt--; + + status = VXGE_HW_OK; + goto exit; + } + + /* no more completions */ + *txdlh = NULL; + status = VXGE_HW_INF_NO_MORE_COMPLETED_DESCRIPTORS; +exit: + return status; +} + +/** + * vxge_hw_fifo_handle_tcode - Handle transfer code. + * @fifo: Handle to the fifo object used for non offload send + * @txdlh: 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_fifo_handle_tcode(struct __vxge_hw_fifo *fifo, + void *txdlh, + enum vxge_hw_fifo_tcode t_code) +{ + struct __vxge_hw_channel *channel; + + enum vxge_hw_status status = VXGE_HW_OK; + channel = &fifo->channel; + + if (((t_code & 0x7) < 0) || ((t_code & 0x7) > 0x4)) { + status = VXGE_HW_ERR_INVALID_TCODE; + goto exit; + } + + fifo->stats->txd_t_code_err_cnt[t_code]++; +exit: + return status; +} + +/** + * vxge_hw_fifo_txdl_free - Free descriptor. + * @fifo: Handle to the fifo object used for non offload send + * @txdlh: Descriptor handle. + * + * Free the reserved descriptor. This operation is "symmetrical" to + * vxge_hw_fifo_txdl_reserve. The "free-ing" completes the descriptor's + * lifecycle. + * + * After free-ing (see vxge_hw_fifo_txdl_free()) the descriptor again can + * be: + * + * - reserved (vxge_hw_fifo_txdl_reserve); + * + * - posted (vxge_hw_fifo_txdl_post); + * + * - completed (vxge_hw_fifo_txdl_next_completed); + * + * - and recycled again (vxge_hw_fifo_txdl_free). + * + * For alternative state transitions and more details please refer to + * the design doc. + * + */ +void vxge_hw_fifo_txdl_free(struct __vxge_hw_fifo *fifo, void *txdlh) +{ + struct __vxge_hw_fifo_txdl_priv *txdl_priv; + u32 max_frags; + struct __vxge_hw_channel *channel; + + channel = &fifo->channel; + + txdl_priv = __vxge_hw_fifo_txdl_priv(fifo, + (struct vxge_hw_fifo_txd *)txdlh); + + max_frags = fifo->config->max_frags; + + vxge_hw_channel_dtr_free(channel, txdlh); +} + +/** + * vxge_hw_vpath_mac_addr_add - Add the mac address entry for this vpath + * to MAC address table. + * @vp: Vpath handle. + * @macaddr: MAC address to be added for this vpath into the list + * @macaddr_mask: MAC address mask for macaddr + * @duplicate_mode: Duplicate MAC address add mode. Please see + * enum vxge_hw_vpath_mac_addr_add_mode{} + * + * Adds the given mac address and mac address mask into the list for this + * vpath. + * see also: vxge_hw_vpath_mac_addr_delete, vxge_hw_vpath_mac_addr_get and + * vxge_hw_vpath_mac_addr_get_next + * + */ +enum vxge_hw_status +vxge_hw_vpath_mac_addr_add( + struct __vxge_hw_vpath_handle *vp, + u8 (macaddr)[ETH_ALEN], + u8 (macaddr_mask)[ETH_ALEN], + enum vxge_hw_vpath_mac_addr_add_mode duplicate_mode) +{ + u32 i; + u64 data1 = 0ULL; + u64 data2 = 0ULL; + enum vxge_hw_status status = VXGE_HW_OK; + + if (vp == NULL) { + status = VXGE_HW_ERR_INVALID_HANDLE; + goto exit; + } + + for (i = 0; i < ETH_ALEN; i++) { + data1 <<= 8; + data1 |= (u8)macaddr[i]; + + data2 <<= 8; + data2 |= (u8)macaddr_mask[i]; + } + + switch (duplicate_mode) { + case VXGE_HW_VPATH_MAC_ADDR_ADD_DUPLICATE: + i = 0; + break; + case VXGE_HW_VPATH_MAC_ADDR_DISCARD_DUPLICATE: + i = 1; + break; + case VXGE_HW_VPATH_MAC_ADDR_REPLACE_DUPLICATE: + i = 2; + break; + default: + i = 0; + break; + } + + status = __vxge_hw_vpath_rts_table_set(vp, + VXGE_HW_RTS_ACCESS_STEER_CTRL_ACTION_ADD_ENTRY, + VXGE_HW_RTS_ACCESS_STEER_CTRL_DATA_STRUCT_SEL_DA, + 0, + VXGE_HW_RTS_ACCESS_STEER_DATA0_DA_MAC_ADDR(data1), + VXGE_HW_RTS_ACCESS_STEER_DATA1_DA_MAC_ADDR_MASK(data2)| + VXGE_HW_RTS_ACCESS_STEER_DATA1_DA_MAC_ADDR_MODE(i)); +exit: + return status; +} + +/** + * vxge_hw_vpath_mac_addr_get - Get the first mac address entry for this vpath + * from MAC address table. + * @vp: Vpath handle. + * @macaddr: First MAC address entry for this vpath in the list + * @macaddr_mask: MAC address mask for macaddr + * + * Returns the first mac address and mac address mask in the list for this + * vpath. + * see also: vxge_hw_vpath_mac_addr_get_next + * + */ +enum vxge_hw_status +vxge_hw_vpath_mac_addr_get( + struct __vxge_hw_vpath_handle *vp, + u8 (macaddr)[ETH_ALEN], + u8 (macaddr_mask)[ETH_ALEN]) +{ + u32 i; + u64 data1 = 0ULL; + u64 data2 = 0ULL; + enum vxge_hw_status status = VXGE_HW_OK; + + if (vp == NULL) { + status = VXGE_HW_ERR_INVALID_HANDLE; + goto exit; + } + + status = __vxge_hw_vpath_rts_table_get(vp, + VXGE_HW_RTS_ACCESS_STEER_CTRL_ACTION_LIST_FIRST_ENTRY, + VXGE_HW_RTS_ACCESS_STEER_CTRL_DATA_STRUCT_SEL_DA, + 0, &data1, &data2); + + if (status != VXGE_HW_OK) + goto exit; + + data1 = VXGE_HW_RTS_ACCESS_STEER_DATA0_GET_DA_MAC_ADDR(data1); + + data2 = VXGE_HW_RTS_ACCESS_STEER_DATA1_GET_DA_MAC_ADDR_MASK(data2); + + for (i = ETH_ALEN; i > 0; i--) { + macaddr[i-1] = (u8)(data1 & 0xFF); + data1 >>= 8; + + macaddr_mask[i-1] = (u8)(data2 & 0xFF); + data2 >>= 8; + } +exit: + return status; +} + +/** + * vxge_hw_vpath_mac_addr_get_next - Get the next mac address entry for this + * vpath + * from MAC address table. + * @vp: Vpath handle. + * @macaddr: Next MAC address entry for this vpath in the list + * @macaddr_mask: MAC address mask for macaddr + * + * Returns the next mac address and mac address mask in the list for this + * vpath. + * see also: vxge_hw_vpath_mac_addr_get + * + */ +enum vxge_hw_status +vxge_hw_vpath_mac_addr_get_next( + struct __vxge_hw_vpath_handle *vp, + u8 (macaddr)[ETH_ALEN], + u8 (macaddr_mask)[ETH_ALEN]) +{ + u32 i; + u64 data1 = 0ULL; + u64 data2 = 0ULL; + enum vxge_hw_status status = VXGE_HW_OK; + + if (vp == NULL) { + status = VXGE_HW_ERR_INVALID_HANDLE; + goto exit; + } + + status = __vxge_hw_vpath_rts_table_get(vp, + VXGE_HW_RTS_ACCESS_STEER_CTRL_ACTION_LIST_NEXT_ENTRY, + VXGE_HW_RTS_ACCESS_STEER_CTRL_DATA_STRUCT_SEL_DA, + 0, &data1, &data2); + + if (status != VXGE_HW_OK) + goto exit; + + data1 = VXGE_HW_RTS_ACCESS_STEER_DATA0_GET_DA_MAC_ADDR(data1); + + data2 = VXGE_HW_RTS_ACCESS_STEER_DATA1_GET_DA_MAC_ADDR_MASK(data2); + + for (i = ETH_ALEN; i > 0; i--) { + macaddr[i-1] = (u8)(data1 & 0xFF); + data1 >>= 8; + + macaddr_mask[i-1] = (u8)(data2 & 0xFF); + data2 >>= 8; + } + +exit: + return status; +} + +/** + * vxge_hw_vpath_mac_addr_delete - Delete the mac address entry for this vpath + * to MAC address table. + * @vp: Vpath handle. + * @macaddr: MAC address to be added for this vpath into the list + * @macaddr_mask: MAC address mask for macaddr + * + * Delete the given mac address and mac address mask into the list for this + * vpath. + * see also: vxge_hw_vpath_mac_addr_add, vxge_hw_vpath_mac_addr_get and + * vxge_hw_vpath_mac_addr_get_next + * + */ +enum vxge_hw_status +vxge_hw_vpath_mac_addr_delete( + struct __vxge_hw_vpath_handle *vp, + u8 (macaddr)[ETH_ALEN], + u8 (macaddr_mask)[ETH_ALEN]) +{ + u32 i; + u64 data1 = 0ULL; + u64 data2 = 0ULL; + enum vxge_hw_status status = VXGE_HW_OK; + + if (vp == NULL) { + status = VXGE_HW_ERR_INVALID_HANDLE; + goto exit; + } + + for (i = 0; i < ETH_ALEN; i++) { + data1 <<= 8; + data1 |= (u8)macaddr[i]; + + data2 <<= 8; + data2 |= (u8)macaddr_mask[i]; + } + + status = __vxge_hw_vpath_rts_table_set(vp, + VXGE_HW_RTS_ACCESS_STEER_CTRL_ACTION_DELETE_ENTRY, + VXGE_HW_RTS_ACCESS_STEER_CTRL_DATA_STRUCT_SEL_DA, + 0, + VXGE_HW_RTS_ACCESS_STEER_DATA0_DA_MAC_ADDR(data1), + VXGE_HW_RTS_ACCESS_STEER_DATA1_DA_MAC_ADDR_MASK(data2)); +exit: + return status; +} + +/** + * vxge_hw_vpath_vid_add - Add the vlan id entry for this vpath + * to vlan id table. + * @vp: Vpath handle. + * @vid: vlan id to be added for this vpath into the list + * + * Adds the given vlan id into the list for this vpath. + * see also: vxge_hw_vpath_vid_delete, vxge_hw_vpath_vid_get and + * vxge_hw_vpath_vid_get_next + * + */ +enum vxge_hw_status +vxge_hw_vpath_vid_add(struct __vxge_hw_vpath_handle *vp, u64 vid) +{ + enum vxge_hw_status status = VXGE_HW_OK; + + if (vp == NULL) { + status = VXGE_HW_ERR_INVALID_HANDLE; + goto exit; + } + + status = __vxge_hw_vpath_rts_table_set(vp, + VXGE_HW_RTS_ACCESS_STEER_CTRL_ACTION_ADD_ENTRY, + VXGE_HW_RTS_ACCESS_STEER_CTRL_DATA_STRUCT_SEL_VID, + 0, VXGE_HW_RTS_ACCESS_STEER_DATA0_VLAN_ID(vid), 0); +exit: + return status; +} + +/** + * vxge_hw_vpath_vid_get - Get the first vid entry for this vpath + * from vlan id table. + * @vp: Vpath handle. + * @vid: Buffer to return vlan id + * + * Returns the first vlan id in the list for this vpath. + * see also: vxge_hw_vpath_vid_get_next + * + */ +enum vxge_hw_status +vxge_hw_vpath_vid_get(struct __vxge_hw_vpath_handle *vp, u64 *vid) +{ + u64 data; + enum vxge_hw_status status = VXGE_HW_OK; + + if (vp == NULL) { + status = VXGE_HW_ERR_INVALID_HANDLE; + goto exit; + } + + status = __vxge_hw_vpath_rts_table_get(vp, + VXGE_HW_RTS_ACCESS_STEER_CTRL_ACTION_LIST_FIRST_ENTRY, + VXGE_HW_RTS_ACCESS_STEER_CTRL_DATA_STRUCT_SEL_VID, + 0, vid, &data); + + *vid = VXGE_HW_RTS_ACCESS_STEER_DATA0_GET_VLAN_ID(*vid); +exit: + return status; +} + +/** + * vxge_hw_vpath_vid_delete - Delete the vlan id entry for this vpath + * to vlan id table. + * @vp: Vpath handle. + * @vid: vlan id to be added for this vpath into the list + * + * Adds the given vlan id into the list for this vpath. + * see also: vxge_hw_vpath_vid_add, vxge_hw_vpath_vid_get and + * vxge_hw_vpath_vid_get_next + * + */ +enum vxge_hw_status +vxge_hw_vpath_vid_delete(struct __vxge_hw_vpath_handle *vp, u64 vid) +{ + enum vxge_hw_status status = VXGE_HW_OK; + + if (vp == NULL) { + status = VXGE_HW_ERR_INVALID_HANDLE; + goto exit; + } + + status = __vxge_hw_vpath_rts_table_set(vp, + VXGE_HW_RTS_ACCESS_STEER_CTRL_ACTION_DELETE_ENTRY, + VXGE_HW_RTS_ACCESS_STEER_CTRL_DATA_STRUCT_SEL_VID, + 0, VXGE_HW_RTS_ACCESS_STEER_DATA0_VLAN_ID(vid), 0); +exit: + return status; +} + +/** + * vxge_hw_vpath_promisc_enable - Enable promiscuous mode. + * @vp: Vpath handle. + * + * Enable promiscuous mode of Titan-e operation. + * + * See also: vxge_hw_vpath_promisc_disable(). + */ +enum vxge_hw_status vxge_hw_vpath_promisc_enable( + struct __vxge_hw_vpath_handle *vp) +{ + u64 val64; + struct __vxge_hw_virtualpath *vpath; + enum vxge_hw_status status = VXGE_HW_OK; + + if ((vp == NULL) || (vp->vpath->ringh == NULL)) { + status = VXGE_HW_ERR_INVALID_HANDLE; + goto exit; + } + + vpath = vp->vpath; + + /* Enable promiscuous mode for function 0 only */ + if (!(vpath->hldev->access_rights & + VXGE_HW_DEVICE_ACCESS_RIGHT_MRPCIM)) + return VXGE_HW_OK; + + val64 = readq(&vpath->vp_reg->rxmac_vcfg0); + + if (!(val64 & VXGE_HW_RXMAC_VCFG0_UCAST_ALL_ADDR_EN)) { + + val64 |= VXGE_HW_RXMAC_VCFG0_UCAST_ALL_ADDR_EN | + VXGE_HW_RXMAC_VCFG0_MCAST_ALL_ADDR_EN | + VXGE_HW_RXMAC_VCFG0_BCAST_EN | + VXGE_HW_RXMAC_VCFG0_ALL_VID_EN; + + writeq(val64, &vpath->vp_reg->rxmac_vcfg0); + } +exit: + return status; +} + +/** + * vxge_hw_vpath_promisc_disable - Disable promiscuous mode. + * @vp: Vpath handle. + * + * Disable promiscuous mode of Titan-e operation. + * + * See also: vxge_hw_vpath_promisc_enable(). + */ +enum vxge_hw_status vxge_hw_vpath_promisc_disable( + struct __vxge_hw_vpath_handle *vp) +{ + u64 val64; + struct __vxge_hw_virtualpath *vpath; + enum vxge_hw_status status = VXGE_HW_OK; + + if ((vp == NULL) || (vp->vpath->ringh == NULL)) { + status = VXGE_HW_ERR_INVALID_HANDLE; + goto exit; + } + + vpath = vp->vpath; + + val64 = readq(&vpath->vp_reg->rxmac_vcfg0); + + if (val64 & VXGE_HW_RXMAC_VCFG0_UCAST_ALL_ADDR_EN) { + + val64 &= ~(VXGE_HW_RXMAC_VCFG0_UCAST_ALL_ADDR_EN | + VXGE_HW_RXMAC_VCFG0_MCAST_ALL_ADDR_EN | + VXGE_HW_RXMAC_VCFG0_ALL_VID_EN); + + writeq(val64, &vpath->vp_reg->rxmac_vcfg0); + } +exit: + return status; +} + +/* + * vxge_hw_vpath_bcast_enable - Enable broadcast + * @vp: Vpath handle. + * + * Enable receiving broadcasts. + */ +enum vxge_hw_status vxge_hw_vpath_bcast_enable( + struct __vxge_hw_vpath_handle *vp) +{ + u64 val64; + struct __vxge_hw_virtualpath *vpath; + enum vxge_hw_status status = VXGE_HW_OK; + + if ((vp == NULL) || (vp->vpath->ringh == NULL)) { + status = VXGE_HW_ERR_INVALID_HANDLE; + goto exit; + } + + vpath = vp->vpath; + + val64 = readq(&vpath->vp_reg->rxmac_vcfg0); + + if (!(val64 & VXGE_HW_RXMAC_VCFG0_BCAST_EN)) { + val64 |= VXGE_HW_RXMAC_VCFG0_BCAST_EN; + writeq(val64, &vpath->vp_reg->rxmac_vcfg0); + } +exit: + return status; +} + +/** + * vxge_hw_vpath_mcast_enable - Enable multicast addresses. + * @vp: Vpath handle. + * + * Enable Titan-e multicast addresses. + * Returns: VXGE_HW_OK on success. + * + */ +enum vxge_hw_status vxge_hw_vpath_mcast_enable( + struct __vxge_hw_vpath_handle *vp) +{ + u64 val64; + struct __vxge_hw_virtualpath *vpath; + enum vxge_hw_status status = VXGE_HW_OK; + + if ((vp == NULL) || (vp->vpath->ringh == NULL)) { + status = VXGE_HW_ERR_INVALID_HANDLE; + goto exit; + } + + vpath = vp->vpath; + + val64 = readq(&vpath->vp_reg->rxmac_vcfg0); + + if (!(val64 & VXGE_HW_RXMAC_VCFG0_MCAST_ALL_ADDR_EN)) { + val64 |= VXGE_HW_RXMAC_VCFG0_MCAST_ALL_ADDR_EN; + writeq(val64, &vpath->vp_reg->rxmac_vcfg0); + } +exit: + return status; +} + +/** + * vxge_hw_vpath_mcast_disable - Disable multicast addresses. + * @vp: Vpath handle. + * + * Disable Titan-e multicast addresses. + * Returns: VXGE_HW_OK - success. + * VXGE_HW_ERR_INVALID_HANDLE - Invalid handle + * + */ +enum vxge_hw_status +vxge_hw_vpath_mcast_disable(struct __vxge_hw_vpath_handle *vp) +{ + u64 val64; + struct __vxge_hw_virtualpath *vpath; + enum vxge_hw_status status = VXGE_HW_OK; + + if ((vp == NULL) || (vp->vpath->ringh == NULL)) { + status = VXGE_HW_ERR_INVALID_HANDLE; + goto exit; + } + + vpath = vp->vpath; + + val64 = readq(&vpath->vp_reg->rxmac_vcfg0); + + if (val64 & VXGE_HW_RXMAC_VCFG0_MCAST_ALL_ADDR_EN) { + val64 &= ~VXGE_HW_RXMAC_VCFG0_MCAST_ALL_ADDR_EN; + writeq(val64, &vpath->vp_reg->rxmac_vcfg0); + } +exit: + return status; +} + +/* + * vxge_hw_vpath_alarm_process - Process Alarms. + * @vpath: Virtual Path. + * @skip_alarms: Do not clear the alarms + * + * Process vpath alarms. + * + */ +enum vxge_hw_status vxge_hw_vpath_alarm_process( + struct __vxge_hw_vpath_handle *vp, + u32 skip_alarms) +{ + enum vxge_hw_status status = VXGE_HW_OK; + + if (vp == NULL) { + status = VXGE_HW_ERR_INVALID_HANDLE; + goto exit; + } + + status = __vxge_hw_vpath_alarm_process(vp->vpath, skip_alarms); +exit: + return status; +} + +/** + * vxge_hw_vpath_msix_set - Associate MSIX vectors with TIM interrupts and + * alrms + * @vp: Virtual Path handle. + * @tim_msix_id: MSIX vectors associated with VXGE_HW_MAX_INTR_PER_VP number of + * interrupts(Can be repeated). If fifo or ring are not enabled + * the MSIX vector for that should be set to 0 + * @alarm_msix_id: MSIX vector for alarm. + * + * This API will associate a given MSIX vector numbers with the four TIM + * interrupts and alarm interrupt. + */ +void +vxge_hw_vpath_msix_set(struct __vxge_hw_vpath_handle *vp, int *tim_msix_id, + int alarm_msix_id) +{ + u64 val64; + struct __vxge_hw_virtualpath *vpath = vp->vpath; + struct vxge_hw_vpath_reg __iomem *vp_reg = vpath->vp_reg; + u32 vp_id = vp->vpath->vp_id; + + val64 = VXGE_HW_INTERRUPT_CFG0_GROUP0_MSIX_FOR_TXTI( + (vp_id * 4) + tim_msix_id[0]) | + VXGE_HW_INTERRUPT_CFG0_GROUP1_MSIX_FOR_TXTI( + (vp_id * 4) + tim_msix_id[1]); + + writeq(val64, &vp_reg->interrupt_cfg0); + + writeq(VXGE_HW_INTERRUPT_CFG2_ALARM_MAP_TO_MSG( + (vpath->hldev->first_vp_id * 4) + alarm_msix_id), + &vp_reg->interrupt_cfg2); + + if (vpath->hldev->config.intr_mode == + VXGE_HW_INTR_MODE_MSIX_ONE_SHOT) { + __vxge_hw_pio_mem_write32_upper((u32)vxge_bVALn( + VXGE_HW_ONE_SHOT_VECT0_EN_ONE_SHOT_VECT0_EN, + 0, 32), &vp_reg->one_shot_vect0_en); + __vxge_hw_pio_mem_write32_upper((u32)vxge_bVALn( + VXGE_HW_ONE_SHOT_VECT1_EN_ONE_SHOT_VECT1_EN, + 0, 32), &vp_reg->one_shot_vect1_en); + __vxge_hw_pio_mem_write32_upper((u32)vxge_bVALn( + VXGE_HW_ONE_SHOT_VECT2_EN_ONE_SHOT_VECT2_EN, + 0, 32), &vp_reg->one_shot_vect2_en); + } +} + +/** + * vxge_hw_vpath_msix_mask - Mask MSIX Vector. + * @vp: Virtual Path handle. + * @msix_id: MSIX ID + * + * The function masks the msix interrupt for the given msix_id + * + * Returns: 0, + * Otherwise, VXGE_HW_ERR_WRONG_IRQ if the msix index is out of range + * status. + * See also: + */ +void +vxge_hw_vpath_msix_mask(struct __vxge_hw_vpath_handle *vp, int msix_id) +{ + struct __vxge_hw_device *hldev = vp->vpath->hldev; + __vxge_hw_pio_mem_write32_upper( + (u32) vxge_bVALn(vxge_mBIT(msix_id >> 2), 0, 32), + &hldev->common_reg->set_msix_mask_vect[msix_id % 4]); +} + +/** + * vxge_hw_vpath_msix_clear - Clear MSIX Vector. + * @vp: Virtual Path handle. + * @msix_id: MSI ID + * + * The function clears the msix interrupt for the given msix_id + * + * Returns: 0, + * Otherwise, VXGE_HW_ERR_WRONG_IRQ if the msix index is out of range + * status. + * See also: + */ +void vxge_hw_vpath_msix_clear(struct __vxge_hw_vpath_handle *vp, int msix_id) +{ + struct __vxge_hw_device *hldev = vp->vpath->hldev; + + if ((hldev->config.intr_mode == VXGE_HW_INTR_MODE_MSIX_ONE_SHOT)) + __vxge_hw_pio_mem_write32_upper( + (u32) vxge_bVALn(vxge_mBIT((msix_id >> 2)), 0, 32), + &hldev->common_reg->clr_msix_one_shot_vec[msix_id % 4]); + else + __vxge_hw_pio_mem_write32_upper( + (u32) vxge_bVALn(vxge_mBIT((msix_id >> 2)), 0, 32), + &hldev->common_reg->clear_msix_mask_vect[msix_id % 4]); +} + +/** + * vxge_hw_vpath_msix_unmask - Unmask the MSIX Vector. + * @vp: Virtual Path handle. + * @msix_id: MSI ID + * + * The function unmasks the msix interrupt for the given msix_id + * + * Returns: 0, + * Otherwise, VXGE_HW_ERR_WRONG_IRQ if the msix index is out of range + * status. + * See also: + */ +void +vxge_hw_vpath_msix_unmask(struct __vxge_hw_vpath_handle *vp, int msix_id) +{ + struct __vxge_hw_device *hldev = vp->vpath->hldev; + __vxge_hw_pio_mem_write32_upper( + (u32)vxge_bVALn(vxge_mBIT(msix_id >> 2), 0, 32), + &hldev->common_reg->clear_msix_mask_vect[msix_id%4]); +} + +/** + * vxge_hw_vpath_inta_mask_tx_rx - Mask Tx and Rx interrupts. + * @vp: Virtual Path handle. + * + * Mask Tx and Rx vpath interrupts. + * + * See also: vxge_hw_vpath_inta_mask_tx_rx() + */ +void vxge_hw_vpath_inta_mask_tx_rx(struct __vxge_hw_vpath_handle *vp) +{ + u64 tim_int_mask0[4] = {[0 ...3] = 0}; + u32 tim_int_mask1[4] = {[0 ...3] = 0}; + u64 val64; + struct __vxge_hw_device *hldev = vp->vpath->hldev; + + VXGE_HW_DEVICE_TIM_INT_MASK_SET(tim_int_mask0, + tim_int_mask1, vp->vpath->vp_id); + + val64 = readq(&hldev->common_reg->tim_int_mask0); + + if ((tim_int_mask0[VXGE_HW_VPATH_INTR_TX] != 0) || + (tim_int_mask0[VXGE_HW_VPATH_INTR_RX] != 0)) { + writeq((tim_int_mask0[VXGE_HW_VPATH_INTR_TX] | + tim_int_mask0[VXGE_HW_VPATH_INTR_RX] | val64), + &hldev->common_reg->tim_int_mask0); + } + + val64 = readl(&hldev->common_reg->tim_int_mask1); + + if ((tim_int_mask1[VXGE_HW_VPATH_INTR_TX] != 0) || + (tim_int_mask1[VXGE_HW_VPATH_INTR_RX] != 0)) { + __vxge_hw_pio_mem_write32_upper( + (tim_int_mask1[VXGE_HW_VPATH_INTR_TX] | + tim_int_mask1[VXGE_HW_VPATH_INTR_RX] | val64), + &hldev->common_reg->tim_int_mask1); + } +} + +/** + * vxge_hw_vpath_inta_unmask_tx_rx - Unmask Tx and Rx interrupts. + * @vp: Virtual Path handle. + * + * Unmask Tx and Rx vpath interrupts. + * + * See also: vxge_hw_vpath_inta_mask_tx_rx() + */ +void vxge_hw_vpath_inta_unmask_tx_rx(struct __vxge_hw_vpath_handle *vp) +{ + u64 tim_int_mask0[4] = {[0 ...3] = 0}; + u32 tim_int_mask1[4] = {[0 ...3] = 0}; + u64 val64; + struct __vxge_hw_device *hldev = vp->vpath->hldev; + + VXGE_HW_DEVICE_TIM_INT_MASK_SET(tim_int_mask0, + tim_int_mask1, vp->vpath->vp_id); + + val64 = readq(&hldev->common_reg->tim_int_mask0); + + if ((tim_int_mask0[VXGE_HW_VPATH_INTR_TX] != 0) || + (tim_int_mask0[VXGE_HW_VPATH_INTR_RX] != 0)) { + writeq((~(tim_int_mask0[VXGE_HW_VPATH_INTR_TX] | + tim_int_mask0[VXGE_HW_VPATH_INTR_RX])) & val64, + &hldev->common_reg->tim_int_mask0); + } + + if ((tim_int_mask1[VXGE_HW_VPATH_INTR_TX] != 0) || + (tim_int_mask1[VXGE_HW_VPATH_INTR_RX] != 0)) { + __vxge_hw_pio_mem_write32_upper( + (~(tim_int_mask1[VXGE_HW_VPATH_INTR_TX] | + tim_int_mask1[VXGE_HW_VPATH_INTR_RX])) & val64, + &hldev->common_reg->tim_int_mask1); + } +} + +/** + * vxge_hw_vpath_poll_rx - Poll Rx Virtual Path for completed + * descriptors and process the same. + * @ring: Handle to the ring object used for receive + * + * The function polls the Rx for the completed descriptors and calls + * the driver via supplied completion callback. + * + * Returns: VXGE_HW_OK, if the polling is completed successful. + * VXGE_HW_COMPLETIONS_REMAIN: There are still more completed + * descriptors available which are yet to be processed. + * + * See also: vxge_hw_vpath_poll_rx() + */ +enum vxge_hw_status vxge_hw_vpath_poll_rx(struct __vxge_hw_ring *ring) +{ + u8 t_code; + enum vxge_hw_status status = VXGE_HW_OK; + void *first_rxdh; + u64 val64 = 0; + int new_count = 0; + + ring->cmpl_cnt = 0; + + status = vxge_hw_ring_rxd_next_completed(ring, &first_rxdh, &t_code); + if (status == VXGE_HW_OK) + ring->callback(ring, first_rxdh, + t_code, ring->channel.userdata); + + if (ring->cmpl_cnt != 0) { + ring->doorbell_cnt += ring->cmpl_cnt; + if (ring->doorbell_cnt >= ring->rxds_limit) { + /* + * Each RxD is of 4 qwords, update the number of + * qwords replenished + */ + new_count = (ring->doorbell_cnt * 4); + + /* For each block add 4 more qwords */ + ring->total_db_cnt += ring->doorbell_cnt; + if (ring->total_db_cnt >= ring->rxds_per_block) { + new_count += 4; + /* Reset total count */ + ring->total_db_cnt %= ring->rxds_per_block; + } + writeq(VXGE_HW_PRC_RXD_DOORBELL_NEW_QW_CNT(new_count), + &ring->vp_reg->prc_rxd_doorbell); + val64 = + readl(&ring->common_reg->titan_general_int_status); + ring->doorbell_cnt = 0; + } + } + + return status; +} + +/** + * vxge_hw_vpath_poll_tx - Poll Tx for completed descriptors and process + * the same. + * @fifo: Handle to the fifo object used for non offload send + * + * The function polls the Tx for the completed descriptors and calls + * the driver via supplied completion callback. + * + * Returns: VXGE_HW_OK, if the polling is completed successful. + * VXGE_HW_COMPLETIONS_REMAIN: There are still more completed + * descriptors available which are yet to be processed. + */ +enum vxge_hw_status vxge_hw_vpath_poll_tx(struct __vxge_hw_fifo *fifo, + struct sk_buff ***skb_ptr, int nr_skb, + int *more) +{ + enum vxge_hw_fifo_tcode t_code; + void *first_txdlh; + enum vxge_hw_status status = VXGE_HW_OK; + struct __vxge_hw_channel *channel; + + channel = &fifo->channel; + + status = vxge_hw_fifo_txdl_next_completed(fifo, + &first_txdlh, &t_code); + if (status == VXGE_HW_OK) + if (fifo->callback(fifo, first_txdlh, t_code, + channel->userdata, skb_ptr, nr_skb, more) != VXGE_HW_OK) + status = VXGE_HW_COMPLETIONS_REMAIN; + + return status; +} |