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|
/*
* Huawei HiNIC PCI Express Linux driver
* Copyright(c) 2017 Huawei Technologies Co., Ltd
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/atomic.h>
#include <linux/semaphore.h>
#include <linux/errno.h>
#include <linux/vmalloc.h>
#include <linux/err.h>
#include <asm/byteorder.h>
#include "hinic_hw_if.h"
#include "hinic_hw_wqe.h"
#include "hinic_hw_wq.h"
#include "hinic_hw_cmdq.h"
#define WQS_BLOCKS_PER_PAGE 4
#define WQ_BLOCK_SIZE 4096
#define WQS_PAGE_SIZE (WQS_BLOCKS_PER_PAGE * WQ_BLOCK_SIZE)
#define WQS_MAX_NUM_BLOCKS 128
#define WQS_FREE_BLOCKS_SIZE(wqs) (WQS_MAX_NUM_BLOCKS * \
sizeof((wqs)->free_blocks[0]))
#define WQ_SIZE(wq) ((wq)->q_depth * (wq)->wqebb_size)
#define WQ_PAGE_ADDR_SIZE sizeof(u64)
#define WQ_MAX_PAGES (WQ_BLOCK_SIZE / WQ_PAGE_ADDR_SIZE)
#define CMDQ_BLOCK_SIZE 512
#define CMDQ_PAGE_SIZE 4096
#define CMDQ_WQ_MAX_PAGES (CMDQ_BLOCK_SIZE / WQ_PAGE_ADDR_SIZE)
#define WQ_BASE_VADDR(wqs, wq) \
((void *)((wqs)->page_vaddr[(wq)->page_idx]) \
+ (wq)->block_idx * WQ_BLOCK_SIZE)
#define WQ_BASE_PADDR(wqs, wq) \
((wqs)->page_paddr[(wq)->page_idx] \
+ (wq)->block_idx * WQ_BLOCK_SIZE)
#define WQ_BASE_ADDR(wqs, wq) \
((void *)((wqs)->shadow_page_vaddr[(wq)->page_idx]) \
+ (wq)->block_idx * WQ_BLOCK_SIZE)
#define CMDQ_BASE_VADDR(cmdq_pages, wq) \
((void *)((cmdq_pages)->page_vaddr) \
+ (wq)->block_idx * CMDQ_BLOCK_SIZE)
#define CMDQ_BASE_PADDR(cmdq_pages, wq) \
((cmdq_pages)->page_paddr \
+ (wq)->block_idx * CMDQ_BLOCK_SIZE)
#define CMDQ_BASE_ADDR(cmdq_pages, wq) \
((void *)((cmdq_pages)->shadow_page_vaddr) \
+ (wq)->block_idx * CMDQ_BLOCK_SIZE)
#define WQE_PAGE_OFF(wq, idx) (((idx) & ((wq)->num_wqebbs_per_page - 1)) * \
(wq)->wqebb_size)
#define WQE_PAGE_NUM(wq, idx) (((idx) / ((wq)->num_wqebbs_per_page)) \
& ((wq)->num_q_pages - 1))
#define WQ_PAGE_ADDR(wq, idx) \
((wq)->shadow_block_vaddr[WQE_PAGE_NUM(wq, idx)])
#define MASKED_WQE_IDX(wq, idx) ((idx) & (wq)->mask)
#define WQE_IN_RANGE(wqe, start, end) \
(((unsigned long)(wqe) >= (unsigned long)(start)) && \
((unsigned long)(wqe) < (unsigned long)(end)))
#define WQE_SHADOW_PAGE(wq, wqe) \
(((unsigned long)(wqe) - (unsigned long)(wq)->shadow_wqe) \
/ (wq)->max_wqe_size)
/**
* queue_alloc_page - allocate page for Queue
* @hwif: HW interface for allocating DMA
* @vaddr: virtual address will be returned in this address
* @paddr: physical address will be returned in this address
* @shadow_vaddr: VM area will be return here for holding WQ page addresses
* @page_sz: page size of each WQ page
*
* Return 0 - Success, negative - Failure
**/
static int queue_alloc_page(struct hinic_hwif *hwif, u64 **vaddr, u64 *paddr,
void ***shadow_vaddr, size_t page_sz)
{
struct pci_dev *pdev = hwif->pdev;
dma_addr_t dma_addr;
*vaddr = dma_zalloc_coherent(&pdev->dev, page_sz, &dma_addr,
GFP_KERNEL);
if (!*vaddr) {
dev_err(&pdev->dev, "Failed to allocate dma for wqs page\n");
return -ENOMEM;
}
*paddr = (u64)dma_addr;
/* use vzalloc for big mem */
*shadow_vaddr = vzalloc(page_sz);
if (!*shadow_vaddr)
goto err_shadow_vaddr;
return 0;
err_shadow_vaddr:
dma_free_coherent(&pdev->dev, page_sz, *vaddr, dma_addr);
return -ENOMEM;
}
/**
* wqs_allocate_page - allocate page for WQ set
* @wqs: Work Queue Set
* @page_idx: the page index of the page will be allocated
*
* Return 0 - Success, negative - Failure
**/
static int wqs_allocate_page(struct hinic_wqs *wqs, int page_idx)
{
return queue_alloc_page(wqs->hwif, &wqs->page_vaddr[page_idx],
&wqs->page_paddr[page_idx],
&wqs->shadow_page_vaddr[page_idx],
WQS_PAGE_SIZE);
}
/**
* wqs_free_page - free page of WQ set
* @wqs: Work Queue Set
* @page_idx: the page index of the page will be freed
**/
static void wqs_free_page(struct hinic_wqs *wqs, int page_idx)
{
struct hinic_hwif *hwif = wqs->hwif;
struct pci_dev *pdev = hwif->pdev;
dma_free_coherent(&pdev->dev, WQS_PAGE_SIZE,
wqs->page_vaddr[page_idx],
(dma_addr_t)wqs->page_paddr[page_idx]);
vfree(wqs->shadow_page_vaddr[page_idx]);
}
/**
* cmdq_allocate_page - allocate page for cmdq
* @cmdq_pages: the pages of the cmdq queue struct to hold the page
*
* Return 0 - Success, negative - Failure
**/
static int cmdq_allocate_page(struct hinic_cmdq_pages *cmdq_pages)
{
return queue_alloc_page(cmdq_pages->hwif, &cmdq_pages->page_vaddr,
&cmdq_pages->page_paddr,
&cmdq_pages->shadow_page_vaddr,
CMDQ_PAGE_SIZE);
}
/**
* cmdq_free_page - free page from cmdq
* @cmdq_pages: the pages of the cmdq queue struct that hold the page
*
* Return 0 - Success, negative - Failure
**/
static void cmdq_free_page(struct hinic_cmdq_pages *cmdq_pages)
{
struct hinic_hwif *hwif = cmdq_pages->hwif;
struct pci_dev *pdev = hwif->pdev;
dma_free_coherent(&pdev->dev, CMDQ_PAGE_SIZE,
cmdq_pages->page_vaddr,
(dma_addr_t)cmdq_pages->page_paddr);
vfree(cmdq_pages->shadow_page_vaddr);
}
static int alloc_page_arrays(struct hinic_wqs *wqs)
{
struct hinic_hwif *hwif = wqs->hwif;
struct pci_dev *pdev = hwif->pdev;
size_t size;
size = wqs->num_pages * sizeof(*wqs->page_paddr);
wqs->page_paddr = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
if (!wqs->page_paddr)
return -ENOMEM;
size = wqs->num_pages * sizeof(*wqs->page_vaddr);
wqs->page_vaddr = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
if (!wqs->page_vaddr)
goto err_page_vaddr;
size = wqs->num_pages * sizeof(*wqs->shadow_page_vaddr);
wqs->shadow_page_vaddr = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
if (!wqs->shadow_page_vaddr)
goto err_page_shadow_vaddr;
return 0;
err_page_shadow_vaddr:
devm_kfree(&pdev->dev, wqs->page_vaddr);
err_page_vaddr:
devm_kfree(&pdev->dev, wqs->page_paddr);
return -ENOMEM;
}
static void
|