// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Huawei HiNIC PCI Express Linux driver
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* Copyright(c) 2017 Huawei Technologies Co., Ltd
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <linux/slab.h>
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#include <linux/atomic.h>
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#include <linux/semaphore.h>
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#include <linux/errno.h>
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#include <linux/vmalloc.h>
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#include <linux/err.h>
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#include <asm/byteorder.h>
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#include "hinic_hw_if.h"
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#include "hinic_hw_wqe.h"
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#include "hinic_hw_wq.h"
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#include "hinic_hw_cmdq.h"
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#define WQS_BLOCKS_PER_PAGE 4
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#define WQ_BLOCK_SIZE 4096
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#define WQS_PAGE_SIZE (WQS_BLOCKS_PER_PAGE * WQ_BLOCK_SIZE)
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#define WQS_MAX_NUM_BLOCKS 128
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#define WQS_FREE_BLOCKS_SIZE(wqs) (WQS_MAX_NUM_BLOCKS * \
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sizeof((wqs)->free_blocks[0]))
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#define WQ_SIZE(wq) ((wq)->q_depth * (wq)->wqebb_size)
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#define WQ_PAGE_ADDR_SIZE sizeof(u64)
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#define WQ_MAX_PAGES (WQ_BLOCK_SIZE / WQ_PAGE_ADDR_SIZE)
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#define CMDQ_BLOCK_SIZE 512
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#define CMDQ_PAGE_SIZE 4096
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#define CMDQ_WQ_MAX_PAGES (CMDQ_BLOCK_SIZE / WQ_PAGE_ADDR_SIZE)
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#define WQ_BASE_VADDR(wqs, wq) \
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((void *)((wqs)->page_vaddr[(wq)->page_idx]) \
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+ (wq)->block_idx * WQ_BLOCK_SIZE)
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#define WQ_BASE_PADDR(wqs, wq) \
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((wqs)->page_paddr[(wq)->page_idx] \
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+ (wq)->block_idx * WQ_BLOCK_SIZE)
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#define WQ_BASE_ADDR(wqs, wq) \
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((void *)((wqs)->shadow_page_vaddr[(wq)->page_idx]) \
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+ (wq)->block_idx * WQ_BLOCK_SIZE)
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#define CMDQ_BASE_VADDR(cmdq_pages, wq) \
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((void *)((cmdq_pages)->page_vaddr) \
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+ (wq)->block_idx * CMDQ_BLOCK_SIZE)
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#define CMDQ_BASE_PADDR(cmdq_pages, wq) \
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((cmdq_pages)->page_paddr \
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+ (wq)->block_idx * CMDQ_BLOCK_SIZE)
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#define CMDQ_BASE_ADDR(cmdq_pages, wq) \
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((void *)((cmdq_pages)->shadow_page_vaddr) \
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+ (wq)->block_idx * CMDQ_BLOCK_SIZE)
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#define WQ_PAGE_ADDR(wq, idx) \
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((wq)->shadow_block_vaddr[WQE_PAGE_NUM(wq, idx)])
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#define MASKED_WQE_IDX(wq, idx) ((idx) & (wq)->mask)
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#define WQE_IN_RANGE(wqe, start, end) \
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(((unsigned long)(wqe) >= (unsigned long)(start)) && \
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((unsigned long)(wqe) < (unsigned long)(end)))
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#define WQE_SHADOW_PAGE(wq, wqe) \
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(((unsigned long)(wqe) - (unsigned long)(wq)->shadow_wqe) \
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/ (wq)->max_wqe_size)
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static inline int WQE_PAGE_OFF(struct hinic_wq *wq, u16 idx)
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{
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return (((idx) & ((wq)->num_wqebbs_per_page - 1))
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<< (wq)->wqebb_size_shift);
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}
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static inline int WQE_PAGE_NUM(struct hinic_wq *wq, u16 idx)
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{
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return (((idx) >> ((wq)->wqebbs_per_page_shift))
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& ((wq)->num_q_pages - 1));
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}
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/**
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* queue_alloc_page - allocate page for Queue
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* @hwif: HW interface for allocating DMA
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* @vaddr: virtual address will be returned in this address
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* @paddr: physical address will be returned in this address
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* @shadow_vaddr: VM area will be return here for holding WQ page addresses
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* @page_sz: page size of each WQ page
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*
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* Return 0 - Success, negative - Failure
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**/
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static int queue_alloc_page(struct hinic_hwif *hwif, u64 **vaddr, u64 *paddr,
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void ***shadow_vaddr, size_t page_sz)
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{
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struct pci_dev *pdev = hwif->pdev;
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dma_addr_t dma_addr;
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*vaddr = dma_alloc_coherent(&pdev->dev, page_sz, &dma_addr,
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GFP_KERNEL);
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if (!*vaddr) {
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dev_err(&pdev->dev, "Failed to allocate dma for wqs page\n");
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return -ENOMEM;
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}
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*paddr = (u64)dma_addr;
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/* use vzalloc for big mem */
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*shadow_vaddr = vzalloc(page_sz);
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if (!*shadow_vaddr)
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goto err_shadow_vaddr;
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return 0;
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err_shadow_vaddr:
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dma_free_coherent(&pdev->dev, page_sz, *vaddr, dma_addr);
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return -ENOMEM;
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}
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/**
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* wqs_allocate_page - allocate page for WQ set
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* @wqs: Work Queue Set
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* @page_idx: the page index of the page will be allocated
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*
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* Return 0 - Success, negative - Failure
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**/
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static int wqs_allocate_page(struct hinic_wqs *wqs, int page_idx)
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{
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return queue_alloc_page(wqs->hwif, &wqs->page_vaddr[page_idx],
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&wqs->page_paddr[page_idx],
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&wqs->shadow_page_vaddr[page_idx],
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WQS_PAGE_SIZE);
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}
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/**
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* wqs_free_page - free page of WQ set
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* @wqs: Work Queue Set
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* @page_idx: the page index of the page will be freed
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**/
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static void wqs_free_page(struct hinic_wqs *wqs, int page_idx)
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{
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struct hinic_hwif *hwif = wqs->hwif;
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struct pci_dev *pdev = hwif->pdev;
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dma_free_coherent(&pdev->dev, WQS_PAGE_SIZE,
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wqs->page_vaddr[page_idx],
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(dma_addr_t)wqs->page_paddr[page_idx]);
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vfree(wqs->shadow_page_vaddr[page_idx]);
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}
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/**
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* cmdq_allocate_page - allocate page for cmdq
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* @cmdq_pages: the pages of the cmdq queue struct to hold the page
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*
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* Return 0 - Success, negative - Failure
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**/
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static int cmdq_allocate_page(struct hinic_cmdq_pages *cmdq_pages)
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{
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return queue_alloc_page(cmdq_pages->hwif, &cmdq_pages->page_vaddr,
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&cmdq_pages->page_paddr,
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&cmdq_pages->shadow_page_vaddr,
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CMDQ_PAGE_SIZE);
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}
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/**
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* cmdq_free_page - free page from cmdq
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* @cmdq_pages: the pages of the cmdq queue struct that hold the page
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*
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* Return 0 - Success, negative - Failure
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**/
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static void cmdq_free_page(struct hinic_cmdq_pages *cmdq_pages)
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{
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struct hinic_hwif *hwif = cmdq_pages->hwif;
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struct pci_dev *pdev = hwif->pdev;
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dma_free_coherent(&pdev->dev, CMDQ_PAGE_SIZE,
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cmdq_pages->page_vaddr,
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(dma_addr_t)cmdq_pages->page_paddr);
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vfree(cmdq_pages->shadow_page_vaddr);
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}
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static int alloc_page_arrays(struct hinic_wqs *wqs)
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{
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struct hinic_hwif *hwif = wqs->hwif;
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struct pci_dev *pdev = hwif->pdev;
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wqs->page_paddr = devm_kcalloc(&pdev->dev, wqs->num_pages,
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sizeof(*wqs->page_paddr), GFP_KERNEL);
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if (!wqs->page_paddr)
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return -ENOMEM;
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wqs->page_vaddr = devm_kcalloc(&pdev->dev, wqs->num_pages,
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sizeof(*wqs->page_vaddr), GFP_KERNEL);
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if (!wqs->page_vaddr)
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goto err_page_vaddr;
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wqs->shadow_page_vaddr = devm_kcalloc(&pdev->dev, wqs->num_pages,
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sizeof(*wqs->shadow_page_vaddr),
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GFP_KERNEL);
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if (!wqs->shadow_page_vaddr)
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goto err_page_shadow_vaddr;
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return 0;
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err_page_shadow_vaddr:
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devm_kfree(&pdev->dev, wqs->page_vaddr);
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err_page_vaddr:
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devm_kfree(&pdev->dev, wqs->page_paddr);
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return -ENOMEM;
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}
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static void free_page_arrays(struct hinic_wqs *wqs)
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{
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struct hinic_hwif *hwif = wqs->hwif;
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struct pci_dev *pdev = hwif->pdev;
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devm_kfree(&pdev->dev, wqs->shadow_page_vaddr);
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devm_kfree(&pdev->dev, wqs->page_vaddr);
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devm_kfree(&pdev->dev, wqs->page_paddr);
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}
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static int wqs_next_block(struct hinic_wqs *wqs, int *page_idx,
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int *block_idx)
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{
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int pos;
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down(&wqs->alloc_blocks_lock);
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wqs->num_free_blks--;
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if (wqs->num_free_blks < 0) {
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wqs->num_free_blks++;
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up(&wqs->alloc_blocks_lock);
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return -ENOMEM;
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}
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pos = wqs->alloc_blk_pos++;
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pos &= WQS_MAX_NUM_BLOCKS - 1;
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*page_idx = wqs->free_blocks[pos].page_idx;
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*block_idx = wqs->free_blocks[pos].block_idx;
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wqs->free_blocks[pos].page_idx = -1;
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wqs->free_blocks[pos].block_idx = -1;
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up(&wqs->alloc_blocks_lock);
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return 0;
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}
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static void wqs_return_block(struct hinic_wqs *wqs, int page_idx,
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int block_idx)
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{
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int pos;
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down(&wqs->alloc_blocks_lock);
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pos = wqs->return_blk_pos++;
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pos &= WQS_MAX_NUM_BLOCKS - 1;
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wqs->free_blocks[pos].page_idx = page_idx;
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wqs->free_blocks[pos].block_idx = block_idx;
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wqs->num_free_blks++;
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up(&wqs->alloc_blocks_lock);
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}
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static void init_wqs_blocks_arr(struct hinic_wqs *wqs)
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{
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int page_idx, blk_idx, pos = 0;
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for (page_idx = 0; page_idx < wqs->num_pages; page_idx++) {
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for (blk_idx = 0; blk_idx < WQS_BLOCKS_PER_PAGE; blk_idx++) {
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wqs->free_blocks[pos].page_idx = page_idx;
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wqs->free_blocks[pos].block_idx = blk_idx;
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pos++;
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}
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}
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wqs->alloc_blk_pos = 0;
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wqs->return_blk_pos = pos;
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wqs->num_free_blks = pos;
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sema_init(&wqs->alloc_blocks_lock, 1);
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}
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/**
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* hinic_wqs_alloc - allocate Work Queues set
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* @wqs: Work Queue Set
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* @max_wqs: maximum wqs to allocate
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* @hwif: HW interface for use for the allocation
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*
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* Return 0 - Success, negative - Failure
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**/
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int hinic_wqs_alloc(struct hinic_wqs *wqs, int max_wqs,
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struct hinic_hwif *hwif)
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{
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struct pci_dev *pdev = hwif->pdev;
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int err, i, page_idx;
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max_wqs = ALIGN(max_wqs, WQS_BLOCKS_PER_PAGE);
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if (max_wqs > WQS_MAX_NUM_BLOCKS) {
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dev_err(&pdev->dev, "Invalid max_wqs = %d\n", max_wqs);
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return -EINVAL;
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}
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wqs->hwif = hwif;
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wqs->num_pages = max_wqs / WQS_BLOCKS_PER_PAGE;
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if (alloc_page_arrays(wqs)) {
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dev_err(&pdev->dev,
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"Failed to allocate mem for page addresses\n");
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return -ENOMEM;
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}
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for (page_idx = 0; page_idx < wqs->num_pages; page_idx++) {
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err = wqs_allocate_page(wqs, page_idx);
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if (err) {
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dev_err(&pdev->dev, "Failed wq page allocation\n");
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goto err_wq_allocate_page;
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}
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}
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wqs->free_blocks = devm_kzalloc(&pdev->dev, WQS_FREE_BLOCKS_SIZE(wqs),
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GFP_KERNEL);
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if (!wqs->free_blocks) {
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err = -ENOMEM;
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goto err_alloc_blocks;
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}
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init_wqs_blocks_arr(wqs);
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return 0;
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err_alloc_blocks:
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err_wq_allocate_page:
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for (i = 0; i < page_idx; i++)
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wqs_free_page(wqs, i);
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free_page_arrays(wqs);
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return err;
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}
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/**
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* hinic_wqs_free - free Work Queues set
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* @wqs: Work Queue Set
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**/
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void hinic_wqs_free(struct hinic_wqs *wqs)
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{
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struct hinic_hwif *hwif = wqs->hwif;
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struct pci_dev *pdev = hwif->pdev;
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int page_idx;
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devm_kfree(&pdev->dev, wqs->free_blocks);
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for (page_idx = 0; page_idx < wqs->num_pages; page_idx++)
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wqs_free_page(wqs, page_idx);
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free_page_arrays(wqs);
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}
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/**
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* alloc_wqes_shadow - allocate WQE shadows for WQ
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* @wq: WQ to allocate shadows for
|
*
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* Return 0 - Success, negative - Failure
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**/
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static int alloc_wqes_shadow(struct hinic_wq *wq)
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{
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struct hinic_hwif *hwif = wq->hwif;
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struct pci_dev *pdev = hwif->pdev;
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wq->shadow_wqe = devm_kcalloc(&pdev->dev, wq->num_q_pages,
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wq->max_wqe_size, GFP_KERNEL);
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if (!wq->shadow_wqe)
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return -ENOMEM;
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wq->shadow_idx = devm_kcalloc(&pdev->dev, wq->num_q_pages,
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sizeof(*wq->shadow_idx), GFP_KERNEL);
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if (!wq->shadow_idx)
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goto err_shadow_idx;
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return 0;
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err_shadow_idx:
|
devm_kfree(&pdev->dev, wq->shadow_wqe);
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return -ENOMEM;
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}
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/**
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* free_wqes_shadow - free WQE shadows of WQ
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* @wq: WQ to free shadows from
|
**/
|
static void free_wqes_shadow(struct hinic_wq *wq)
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{
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struct hinic_hwif *hwif = wq->hwif;
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struct pci_dev *pdev = hwif->pdev;
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|
devm_kfree(&pdev->dev, wq->shadow_idx);
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devm_kfree(&pdev->dev, wq->shadow_wqe);
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}
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|
/**
|
* free_wq_pages - free pages of WQ
|
* @hwif: HW interface for releasing dma addresses
|
* @wq: WQ to free pages from
|
* @num_q_pages: number pages to free
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**/
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static void free_wq_pages(struct hinic_wq *wq, struct hinic_hwif *hwif,
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int num_q_pages)
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{
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struct pci_dev *pdev = hwif->pdev;
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int i;
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|
for (i = 0; i < num_q_pages; i++) {
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void **vaddr = &wq->shadow_block_vaddr[i];
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u64 *paddr = &wq->block_vaddr[i];
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dma_addr_t dma_addr;
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dma_addr = (dma_addr_t)be64_to_cpu(*paddr);
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dma_free_coherent(&pdev->dev, wq->wq_page_size, *vaddr,
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dma_addr);
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}
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|
free_wqes_shadow(wq);
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}
|
|
/**
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* alloc_wq_pages - alloc pages for WQ
|
* @hwif: HW interface for allocating dma addresses
|
* @wq: WQ to allocate pages for
|
* @max_pages: maximum pages allowed
|
*
|
* Return 0 - Success, negative - Failure
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**/
|
static int alloc_wq_pages(struct hinic_wq *wq, struct hinic_hwif *hwif,
|
int max_pages)
|
{
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struct pci_dev *pdev = hwif->pdev;
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int i, err, num_q_pages;
|
|
num_q_pages = ALIGN(WQ_SIZE(wq), wq->wq_page_size) / wq->wq_page_size;
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if (num_q_pages > max_pages) {
|
dev_err(&pdev->dev, "Number wq pages exceeds the limit\n");
|
return -EINVAL;
|
}
|
|
if (num_q_pages & (num_q_pages - 1)) {
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dev_err(&pdev->dev, "Number wq pages must be power of 2\n");
|
return -EINVAL;
|
}
|
|
wq->num_q_pages = num_q_pages;
|
|
err = alloc_wqes_shadow(wq);
|
if (err) {
|
dev_err(&pdev->dev, "Failed to allocate wqe shadow\n");
|
return err;
|
}
|
|
for (i = 0; i < num_q_pages; i++) {
|
void **vaddr = &wq->shadow_block_vaddr[i];
|
u64 *paddr = &wq->block_vaddr[i];
|
dma_addr_t dma_addr;
|
|
*vaddr = dma_alloc_coherent(&pdev->dev, wq->wq_page_size,
|
&dma_addr, GFP_KERNEL);
|
if (!*vaddr) {
|
dev_err(&pdev->dev, "Failed to allocate wq page\n");
|
goto err_alloc_wq_pages;
|
}
|
|
/* HW uses Big Endian Format */
|
*paddr = cpu_to_be64(dma_addr);
|
}
|
|
return 0;
|
|
err_alloc_wq_pages:
|
free_wq_pages(wq, hwif, i);
|
return -ENOMEM;
|
}
|
|
/**
|
* hinic_wq_allocate - Allocate the WQ resources from the WQS
|
* @wqs: WQ set from which to allocate the WQ resources
|
* @wq: WQ to allocate resources for it from the WQ set
|
* @wqebb_size: Work Queue Block Byte Size
|
* @wq_page_size: the page size in the Work Queue
|
* @q_depth: number of wqebbs in WQ
|
* @max_wqe_size: maximum WQE size that will be used in the WQ
|
*
|
* Return 0 - Success, negative - Failure
|
**/
|
int hinic_wq_allocate(struct hinic_wqs *wqs, struct hinic_wq *wq,
|
u16 wqebb_size, u32 wq_page_size, u16 q_depth,
|
u16 max_wqe_size)
|
{
|
struct hinic_hwif *hwif = wqs->hwif;
|
struct pci_dev *pdev = hwif->pdev;
|
u16 num_wqebbs_per_page;
|
u16 wqebb_size_shift;
|
int err;
|
|
if (!is_power_of_2(wqebb_size)) {
|
dev_err(&pdev->dev, "wqebb_size must be power of 2\n");
|
return -EINVAL;
|
}
|
|
if (wq_page_size == 0) {
|
dev_err(&pdev->dev, "wq_page_size must be > 0\n");
|
return -EINVAL;
|
}
|
|
if (q_depth & (q_depth - 1)) {
|
dev_err(&pdev->dev, "WQ q_depth must be power of 2\n");
|
return -EINVAL;
|
}
|
|
wqebb_size_shift = ilog2(wqebb_size);
|
num_wqebbs_per_page = ALIGN(wq_page_size, wqebb_size)
|
>> wqebb_size_shift;
|
|
if (!is_power_of_2(num_wqebbs_per_page)) {
|
dev_err(&pdev->dev, "num wqebbs per page must be power of 2\n");
|
return -EINVAL;
|
}
|
|
wq->hwif = hwif;
|
|
err = wqs_next_block(wqs, &wq->page_idx, &wq->block_idx);
|
if (err) {
|
dev_err(&pdev->dev, "Failed to get free wqs next block\n");
|
return err;
|
}
|
|
wq->wqebb_size = wqebb_size;
|
wq->wq_page_size = wq_page_size;
|
wq->q_depth = q_depth;
|
wq->max_wqe_size = max_wqe_size;
|
wq->num_wqebbs_per_page = num_wqebbs_per_page;
|
wq->wqebbs_per_page_shift = ilog2(num_wqebbs_per_page);
|
wq->wqebb_size_shift = wqebb_size_shift;
|
wq->block_vaddr = WQ_BASE_VADDR(wqs, wq);
|
wq->shadow_block_vaddr = WQ_BASE_ADDR(wqs, wq);
|
wq->block_paddr = WQ_BASE_PADDR(wqs, wq);
|
|
err = alloc_wq_pages(wq, wqs->hwif, WQ_MAX_PAGES);
|
if (err) {
|
dev_err(&pdev->dev, "Failed to allocate wq pages\n");
|
goto err_alloc_wq_pages;
|
}
|
|
atomic_set(&wq->cons_idx, 0);
|
atomic_set(&wq->prod_idx, 0);
|
atomic_set(&wq->delta, q_depth);
|
wq->mask = q_depth - 1;
|
|
return 0;
|
|
err_alloc_wq_pages:
|
wqs_return_block(wqs, wq->page_idx, wq->block_idx);
|
return err;
|
}
|
|
/**
|
* hinic_wq_free - Free the WQ resources to the WQS
|
* @wqs: WQ set to free the WQ resources to it
|
* @wq: WQ to free its resources to the WQ set resources
|
**/
|
void hinic_wq_free(struct hinic_wqs *wqs, struct hinic_wq *wq)
|
{
|
free_wq_pages(wq, wqs->hwif, wq->num_q_pages);
|
|
wqs_return_block(wqs, wq->page_idx, wq->block_idx);
|
}
|
|
/**
|
* hinic_wqs_cmdq_alloc - Allocate wqs for cmdqs
|
* @cmdq_pages: will hold the pages of the cmdq
|
* @wq: returned wqs
|
* @hwif: HW interface
|
* @cmdq_blocks: number of cmdq blocks/wq to allocate
|
* @wqebb_size: Work Queue Block Byte Size
|
* @wq_page_size: the page size in the Work Queue
|
* @q_depth: number of wqebbs in WQ
|
* @max_wqe_size: maximum WQE size that will be used in the WQ
|
*
|
* Return 0 - Success, negative - Failure
|
**/
|
int hinic_wqs_cmdq_alloc(struct hinic_cmdq_pages *cmdq_pages,
|
struct hinic_wq *wq, struct hinic_hwif *hwif,
|
int cmdq_blocks, u16 wqebb_size, u32 wq_page_size,
|
u16 q_depth, u16 max_wqe_size)
|
{
|
struct pci_dev *pdev = hwif->pdev;
|
u16 num_wqebbs_per_page_shift;
|
u16 num_wqebbs_per_page;
|
u16 wqebb_size_shift;
|
int i, j, err = -ENOMEM;
|
|
if (!is_power_of_2(wqebb_size)) {
|
dev_err(&pdev->dev, "wqebb_size must be power of 2\n");
|
return -EINVAL;
|
}
|
|
if (wq_page_size == 0) {
|
dev_err(&pdev->dev, "wq_page_size must be > 0\n");
|
return -EINVAL;
|
}
|
|
if (q_depth & (q_depth - 1)) {
|
dev_err(&pdev->dev, "WQ q_depth must be power of 2\n");
|
return -EINVAL;
|
}
|
|
wqebb_size_shift = ilog2(wqebb_size);
|
num_wqebbs_per_page = ALIGN(wq_page_size, wqebb_size)
|
>> wqebb_size_shift;
|
|
if (!is_power_of_2(num_wqebbs_per_page)) {
|
dev_err(&pdev->dev, "num wqebbs per page must be power of 2\n");
|
return -EINVAL;
|
}
|
|
cmdq_pages->hwif = hwif;
|
|
err = cmdq_allocate_page(cmdq_pages);
|
if (err) {
|
dev_err(&pdev->dev, "Failed to allocate CMDQ page\n");
|
return err;
|
}
|
num_wqebbs_per_page_shift = ilog2(num_wqebbs_per_page);
|
|
for (i = 0; i < cmdq_blocks; i++) {
|
wq[i].hwif = hwif;
|
wq[i].page_idx = 0;
|
wq[i].block_idx = i;
|
|
wq[i].wqebb_size = wqebb_size;
|
wq[i].wq_page_size = wq_page_size;
|
wq[i].q_depth = q_depth;
|
wq[i].max_wqe_size = max_wqe_size;
|
wq[i].num_wqebbs_per_page = num_wqebbs_per_page;
|
wq[i].wqebbs_per_page_shift = num_wqebbs_per_page_shift;
|
wq[i].wqebb_size_shift = wqebb_size_shift;
|
wq[i].block_vaddr = CMDQ_BASE_VADDR(cmdq_pages, &wq[i]);
|
wq[i].shadow_block_vaddr = CMDQ_BASE_ADDR(cmdq_pages, &wq[i]);
|
wq[i].block_paddr = CMDQ_BASE_PADDR(cmdq_pages, &wq[i]);
|
|
err = alloc_wq_pages(&wq[i], cmdq_pages->hwif,
|
CMDQ_WQ_MAX_PAGES);
|
if (err) {
|
dev_err(&pdev->dev, "Failed to alloc CMDQ blocks\n");
|
goto err_cmdq_block;
|
}
|
|
atomic_set(&wq[i].cons_idx, 0);
|
atomic_set(&wq[i].prod_idx, 0);
|
atomic_set(&wq[i].delta, q_depth);
|
wq[i].mask = q_depth - 1;
|
}
|
|
return 0;
|
|
err_cmdq_block:
|
for (j = 0; j < i; j++)
|
free_wq_pages(&wq[j], cmdq_pages->hwif, wq[j].num_q_pages);
|
|
cmdq_free_page(cmdq_pages);
|
return err;
|
}
|
|
/**
|
* hinic_wqs_cmdq_free - Free wqs from cmdqs
|
* @cmdq_pages: hold the pages of the cmdq
|
* @wq: wqs to free
|
* @cmdq_blocks: number of wqs to free
|
**/
|
void hinic_wqs_cmdq_free(struct hinic_cmdq_pages *cmdq_pages,
|
struct hinic_wq *wq, int cmdq_blocks)
|
{
|
int i;
|
|
for (i = 0; i < cmdq_blocks; i++)
|
free_wq_pages(&wq[i], cmdq_pages->hwif, wq[i].num_q_pages);
|
|
cmdq_free_page(cmdq_pages);
|
}
|
|
static void copy_wqe_to_shadow(struct hinic_wq *wq, void *shadow_addr,
|
int num_wqebbs, u16 idx)
|
{
|
void *wqebb_addr;
|
int i;
|
|
for (i = 0; i < num_wqebbs; i++, idx++) {
|
idx = MASKED_WQE_IDX(wq, idx);
|
wqebb_addr = WQ_PAGE_ADDR(wq, idx) +
|
WQE_PAGE_OFF(wq, idx);
|
|
memcpy(shadow_addr, wqebb_addr, wq->wqebb_size);
|
|
shadow_addr += wq->wqebb_size;
|
}
|
}
|
|
static void copy_wqe_from_shadow(struct hinic_wq *wq, void *shadow_addr,
|
int num_wqebbs, u16 idx)
|
{
|
void *wqebb_addr;
|
int i;
|
|
for (i = 0; i < num_wqebbs; i++, idx++) {
|
idx = MASKED_WQE_IDX(wq, idx);
|
wqebb_addr = WQ_PAGE_ADDR(wq, idx) +
|
WQE_PAGE_OFF(wq, idx);
|
|
memcpy(wqebb_addr, shadow_addr, wq->wqebb_size);
|
shadow_addr += wq->wqebb_size;
|
}
|
}
|
|
/**
|
* hinic_get_wqe - get wqe ptr in the current pi and update the pi
|
* @wq: wq to get wqe from
|
* @wqe_size: wqe size
|
* @prod_idx: returned pi
|
*
|
* Return wqe pointer
|
**/
|
struct hinic_hw_wqe *hinic_get_wqe(struct hinic_wq *wq, unsigned int wqe_size,
|
u16 *prod_idx)
|
{
|
int curr_pg, end_pg, num_wqebbs;
|
u16 curr_prod_idx, end_prod_idx;
|
|
*prod_idx = MASKED_WQE_IDX(wq, atomic_read(&wq->prod_idx));
|
|
num_wqebbs = ALIGN(wqe_size, wq->wqebb_size) >> wq->wqebb_size_shift;
|
|
if (atomic_sub_return(num_wqebbs, &wq->delta) <= 0) {
|
atomic_add(num_wqebbs, &wq->delta);
|
return ERR_PTR(-EBUSY);
|
}
|
|
end_prod_idx = atomic_add_return(num_wqebbs, &wq->prod_idx);
|
|
end_prod_idx = MASKED_WQE_IDX(wq, end_prod_idx);
|
curr_prod_idx = end_prod_idx - num_wqebbs;
|
curr_prod_idx = MASKED_WQE_IDX(wq, curr_prod_idx);
|
|
/* end prod index points to the next wqebb, therefore minus 1 */
|
end_prod_idx = MASKED_WQE_IDX(wq, end_prod_idx - 1);
|
|
curr_pg = WQE_PAGE_NUM(wq, curr_prod_idx);
|
end_pg = WQE_PAGE_NUM(wq, end_prod_idx);
|
|
*prod_idx = curr_prod_idx;
|
|
/* If we only have one page, still need to get shadown wqe when
|
* wqe rolling-over page
|
*/
|
if (curr_pg != end_pg || end_prod_idx < *prod_idx) {
|
void *shadow_addr = &wq->shadow_wqe[curr_pg * wq->max_wqe_size];
|
|
copy_wqe_to_shadow(wq, shadow_addr, num_wqebbs, *prod_idx);
|
|
wq->shadow_idx[curr_pg] = *prod_idx;
|
return shadow_addr;
|
}
|
|
return WQ_PAGE_ADDR(wq, *prod_idx) + WQE_PAGE_OFF(wq, *prod_idx);
|
}
|
|
/**
|
* hinic_return_wqe - return the wqe when transmit failed
|
* @wq: wq to return wqe
|
* @wqe_size: wqe size
|
**/
|
void hinic_return_wqe(struct hinic_wq *wq, unsigned int wqe_size)
|
{
|
int num_wqebbs = ALIGN(wqe_size, wq->wqebb_size) / wq->wqebb_size;
|
|
atomic_sub(num_wqebbs, &wq->prod_idx);
|
|
atomic_add(num_wqebbs, &wq->delta);
|
}
|
|
/**
|
* hinic_put_wqe - return the wqe place to use for a new wqe
|
* @wq: wq to return wqe
|
* @wqe_size: wqe size
|
**/
|
void hinic_put_wqe(struct hinic_wq *wq, unsigned int wqe_size)
|
{
|
int num_wqebbs = ALIGN(wqe_size, wq->wqebb_size)
|
>> wq->wqebb_size_shift;
|
|
atomic_add(num_wqebbs, &wq->cons_idx);
|
|
atomic_add(num_wqebbs, &wq->delta);
|
}
|
|
/**
|
* hinic_read_wqe - read wqe ptr in the current ci
|
* @wq: wq to get read from
|
* @wqe_size: wqe size
|
* @cons_idx: returned ci
|
*
|
* Return wqe pointer
|
**/
|
struct hinic_hw_wqe *hinic_read_wqe(struct hinic_wq *wq, unsigned int wqe_size,
|
u16 *cons_idx)
|
{
|
int num_wqebbs = ALIGN(wqe_size, wq->wqebb_size)
|
>> wq->wqebb_size_shift;
|
u16 curr_cons_idx, end_cons_idx;
|
int curr_pg, end_pg;
|
|
if ((atomic_read(&wq->delta) + num_wqebbs) > wq->q_depth)
|
return ERR_PTR(-EBUSY);
|
|
curr_cons_idx = atomic_read(&wq->cons_idx);
|
|
curr_cons_idx = MASKED_WQE_IDX(wq, curr_cons_idx);
|
end_cons_idx = MASKED_WQE_IDX(wq, curr_cons_idx + num_wqebbs - 1);
|
|
curr_pg = WQE_PAGE_NUM(wq, curr_cons_idx);
|
end_pg = WQE_PAGE_NUM(wq, end_cons_idx);
|
|
*cons_idx = curr_cons_idx;
|
|
/* If we only have one page, still need to get shadown wqe when
|
* wqe rolling-over page
|
*/
|
if (curr_pg != end_pg || end_cons_idx < curr_cons_idx) {
|
void *shadow_addr = &wq->shadow_wqe[curr_pg * wq->max_wqe_size];
|
|
copy_wqe_to_shadow(wq, shadow_addr, num_wqebbs, *cons_idx);
|
return shadow_addr;
|
}
|
|
return WQ_PAGE_ADDR(wq, *cons_idx) + WQE_PAGE_OFF(wq, *cons_idx);
|
}
|
|
/**
|
* hinic_read_wqe_direct - read wqe directly from ci position
|
* @wq: wq
|
* @cons_idx: ci position
|
*
|
* Return wqe
|
**/
|
struct hinic_hw_wqe *hinic_read_wqe_direct(struct hinic_wq *wq, u16 cons_idx)
|
{
|
return WQ_PAGE_ADDR(wq, cons_idx) + WQE_PAGE_OFF(wq, cons_idx);
|
}
|
|
/**
|
* wqe_shadow - check if a wqe is shadow
|
* @wq: wq of the wqe
|
* @wqe: the wqe for shadow checking
|
*
|
* Return true - shadow, false - Not shadow
|
**/
|
static inline bool wqe_shadow(struct hinic_wq *wq, struct hinic_hw_wqe *wqe)
|
{
|
size_t wqe_shadow_size = wq->num_q_pages * wq->max_wqe_size;
|
|
return WQE_IN_RANGE(wqe, wq->shadow_wqe,
|
&wq->shadow_wqe[wqe_shadow_size]);
|
}
|
|
/**
|
* hinic_write_wqe - write the wqe to the wq
|
* @wq: wq to write wqe to
|
* @wqe: wqe to write
|
* @wqe_size: wqe size
|
**/
|
void hinic_write_wqe(struct hinic_wq *wq, struct hinic_hw_wqe *wqe,
|
unsigned int wqe_size)
|
{
|
int curr_pg, num_wqebbs;
|
void *shadow_addr;
|
u16 prod_idx;
|
|
if (wqe_shadow(wq, wqe)) {
|
curr_pg = WQE_SHADOW_PAGE(wq, wqe);
|
|
prod_idx = wq->shadow_idx[curr_pg];
|
num_wqebbs = ALIGN(wqe_size, wq->wqebb_size) / wq->wqebb_size;
|
shadow_addr = &wq->shadow_wqe[curr_pg * wq->max_wqe_size];
|
|
copy_wqe_from_shadow(wq, shadow_addr, num_wqebbs, prod_idx);
|
}
|
}
|
