| /* |
| * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved. |
| * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| #ifndef __NSS_DP_SYN_DP__ |
| #define __NSS_DP_SYN_DP__ |
| |
| #include "syn_dma_desc.h" |
| #include "syn_dp_rx.h" |
| #include "syn_dp_tx.h" |
| |
| /* |
| * The driver uses kernel DMA constructs that assume an architecture |
| * where the view of physical addresses is consistent between SoC and |
| * IO device(SynopsysGMAC). |
| * Note that this may not be compatible for platforms where this |
| * assumption is not true, for example IO devices with IOMMU support. |
| */ |
| #if defined(CONFIG_ARM_SMMU) || \ |
| defined(CONFIG_IOMMU_SUPPORT) |
| #error "Build Error: Platform is enabled with IOMMU/SMMU support." |
| #endif |
| |
| #define SYN_DP_MINI_JUMBO_FRAME_MTU 1978 |
| #define SYN_DP_MAX_DESC_BUFF_LEN 0x1FFF /* Max size of buffer that can be programed into one field of desc */ |
| #define SYN_DP_SKB_ALLOC_SIZE (SYN_DP_MINI_JUMBO_FRAME_MTU + NET_IP_ALIGN) |
| #define SYN_DP_SKB_HEADROOM 128 |
| #define SYN_DP_PAGE_MODE_SKB_SIZE 256 /* SKB head buffer size for page mode */ |
| #define SYN_DP_QUEUE_INDEX 0 /* Only one Tx DMA channel 0 enabled */ |
| |
| extern int tx_requeue_stop; |
| extern int tx_desc_threshold_size; |
| extern int tx_completion_load_balance; |
| extern int tx_completion_load_balance_threshold; |
| extern int tx_completion_load_balance_cpu; |
| |
| /* |
| * syn_dp_info |
| * Synopysys GMAC Dataplane information |
| */ |
| struct syn_dp_info { |
| struct syn_dp_info_rx dp_info_rx; |
| struct syn_dp_info_tx dp_info_tx; |
| void __iomem *mac_base; |
| dma_addr_t rx_desc_dma_addr; |
| dma_addr_t tx_desc_dma_addr; |
| int napi_added; |
| }; |
| |
| /* |
| * GMAC TX/Rx APIs |
| */ |
| int syn_dp_cfg_rx_setup_rings(struct syn_dp_info *dev_info); |
| void syn_dp_cfg_rx_cleanup_rings(struct syn_dp_info *dev_info); |
| int syn_dp_cfg_tx_setup_rings(struct syn_dp_info *dev_info); |
| void syn_dp_cfg_tx_cleanup_rings(struct syn_dp_info *dev_info); |
| |
| int syn_dp_rx(struct syn_dp_info_rx *rx_info, int budget); |
| int syn_dp_rx_refill(struct syn_dp_info_rx *rx_info); |
| int syn_dp_rx_refill_page_mode(struct syn_dp_info_rx *rx_info); |
| int syn_dp_tx(struct syn_dp_info_tx *tx_info, struct sk_buff *skb); |
| int syn_dp_tx_complete(struct syn_dp_info_tx *tx_info, int budget); |
| |
| #endif /* __NSS_DP_SYN_DP__ */ |
