// SPDX-License-Identifier: GPL-2.0
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/*
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* Rockchip Endpoint function driver
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*
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* Copyright (C) 2023 Rockchip Electronic Co,. Ltd.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/fs.h>
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#include <linux/uaccess.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/io.h>
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#include <linux/delay.h>
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#include <linux/miscdevice.h>
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#include <linux/mutex.h>
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#include <linux/ctype.h>
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#include <linux/of.h>
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#include <uapi/linux/rk-pcie-ep.h>
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#include "../../pci/controller/rockchip-pcie-dma.h"
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#include "../../pci/controller/dwc/pcie-dw-dmatest.h"
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#define DRV_NAME "pcie-rkep"
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#ifndef PCI_VENDOR_ID_ROCKCHIP
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#define PCI_VENDOR_ID_ROCKCHIP 0x1d87
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#endif
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#define MISC_DEV_NAME_MAX_LENGTH 0x80
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static DEFINE_MUTEX(rkep_mutex);
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#define BAR_0_SZ SZ_4M
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#define RKEP_NUM_MSI_VECTORS 4
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#define RKEP_NUM_MSIX_VECTORS 8
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#define PCIe_CLIENT_MSI_IRQ_OBJ 0 /* rockchip ep object special irq */
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#define PCIE_DMA_OFFSET 0x0
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#define PCIE_DMA_CTRL_OFF 0x8
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#define PCIE_DMA_WR_ENB 0xc
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#define PCIE_DMA_WR_CTRL_LO 0x200
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#define PCIE_DMA_WR_CTRL_HI 0x204
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#define PCIE_DMA_WR_XFERSIZE 0x208
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#define PCIE_DMA_WR_SAR_PTR_LO 0x20c
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#define PCIE_DMA_WR_SAR_PTR_HI 0x210
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#define PCIE_DMA_WR_DAR_PTR_LO 0x214
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#define PCIE_DMA_WR_DAR_PTR_HI 0x218
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#define PCIE_DMA_WR_WEILO 0x18
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#define PCIE_DMA_WR_WEIHI 0x1c
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#define PCIE_DMA_WR_DOORBELL 0x10
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#define PCIE_DMA_WR_INT_STATUS 0x4c
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#define PCIE_DMA_WR_INT_MASK 0x54
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#define PCIE_DMA_WR_INT_CLEAR 0x58
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#define PCIE_DMA_RD_ENB 0x2c
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#define PCIE_DMA_RD_CTRL_LO 0x300
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#define PCIE_DMA_RD_CTRL_HI 0x304
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#define PCIE_DMA_RD_XFERSIZE 0x308
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#define PCIE_DMA_RD_SAR_PTR_LO 0x30c
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#define PCIE_DMA_RD_SAR_PTR_HI 0x310
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#define PCIE_DMA_RD_DAR_PTR_LO 0x314
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#define PCIE_DMA_RD_DAR_PTR_HI 0x318
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#define PCIE_DMA_RD_WEILO 0x38
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#define PCIE_DMA_RD_WEIHI 0x3c
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#define PCIE_DMA_RD_DOORBELL 0x30
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#define PCIE_DMA_RD_INT_STATUS 0xa0
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#define PCIE_DMA_RD_INT_MASK 0xa8
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#define PCIE_DMA_RD_INT_CLEAR 0xac
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#define PCIE_DMA_CHANEL_MAX_NUM 2
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#define RKEP_USER_MEM_SIZE SZ_64M
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#define PCIE_CFG_ELBI_APP_OFFSET 0xe00
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#define PCIE_ELBI_REG_NUM 0x2
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struct pcie_rkep_msix_context {
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struct pci_dev *dev;
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u16 msg_id;
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u8 *name;
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};
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struct pcie_rkep {
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struct pci_dev *pdev;
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void __iomem *bar0;
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void __iomem *bar2;
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void __iomem *bar4;
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bool in_used;
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struct miscdevice dev;
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struct msix_entry msix_entries[RKEP_NUM_MSIX_VECTORS];
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struct pcie_rkep_msix_context msix_ctx[RKEP_NUM_MSIX_VECTORS];
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struct pcie_rkep_msix_context msi_ctx[RKEP_NUM_MSI_VECTORS];
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bool msi_enable;
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bool msix_enable;
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struct dma_trx_obj *dma_obj;
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struct pcie_ep_obj_info *obj_info;
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struct page *user_pages; /* Allocated physical memory for user space */
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struct fasync_struct *async;
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};
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static int pcie_rkep_fasync(int fd, struct file *file, int mode)
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{
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struct miscdevice *miscdev = file->private_data;
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struct pcie_rkep *pcie_rkep = container_of(miscdev, struct pcie_rkep, dev);
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return fasync_helper(fd, file, mode, &pcie_rkep->async);
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}
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static int pcie_rkep_open(struct inode *inode, struct file *file)
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{
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struct miscdevice *miscdev = file->private_data;
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struct pcie_rkep *pcie_rkep = container_of(miscdev, struct pcie_rkep, dev);
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int ret = 0;
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mutex_lock(&rkep_mutex);
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if (pcie_rkep->in_used)
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ret = -EINVAL;
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else
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pcie_rkep->in_used = true;
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mutex_unlock(&rkep_mutex);
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return ret;
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}
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static int pcie_rkep_release(struct inode *inode, struct file *file)
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{
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struct miscdevice *miscdev = file->private_data;
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struct pcie_rkep *pcie_rkep = container_of(miscdev, struct pcie_rkep, dev);
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mutex_lock(&rkep_mutex);
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pcie_rkep->in_used = false;
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pcie_rkep_fasync(-1, file, 0);
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mutex_unlock(&rkep_mutex);
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return 0;
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}
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static ssize_t pcie_rkep_write(struct file *file, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct miscdevice *miscdev = file->private_data;
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struct pcie_rkep *pcie_rkep = container_of(miscdev, struct pcie_rkep, dev);
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u32 *bar0_buf;
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int loop, i = 0;
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size_t raw_count = count;
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count = (count % 4) ? (count - count % 4) : count;
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if (count > BAR_0_SZ)
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return -EINVAL;
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bar0_buf = kzalloc(count, GFP_KERNEL);
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if (!bar0_buf)
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return -ENOMEM;
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if (copy_from_user(bar0_buf, buf, count)) {
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raw_count = -EFAULT;
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goto exit;
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}
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for (loop = 0; loop < count / 4; loop++) {
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iowrite32(bar0_buf[i], pcie_rkep->bar0 + loop * 4);
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i++;
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}
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exit:
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kfree(bar0_buf);
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return raw_count;
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}
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static ssize_t pcie_rkep_read(struct file *file, char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct miscdevice *miscdev = file->private_data;
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struct pcie_rkep *pcie_rkep = container_of(miscdev, struct pcie_rkep, dev);
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u32 *bar0_buf;
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int loop, i = 0;
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size_t raw_count = count;
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count = (count % 4) ? (count - count % 4) : count;
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if (count > BAR_0_SZ)
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return -EINVAL;
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bar0_buf = kzalloc(count, GFP_ATOMIC);
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if (!bar0_buf)
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return -ENOMEM;
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for (loop = 0; loop < count / 4; loop++) {
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bar0_buf[i] = ioread32(pcie_rkep->bar0 + loop * 4);
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i++;
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}
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if (copy_to_user(buf, bar0_buf, count)) {
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raw_count = -EFAULT;
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goto exit;
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}
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exit:
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kfree(bar0_buf);
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return raw_count;
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}
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static int pcie_rkep_mmap(struct file *file, struct vm_area_struct *vma)
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{
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u64 addr;
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struct miscdevice *miscdev = file->private_data;
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struct pcie_rkep *pcie_rkep = container_of(miscdev, struct pcie_rkep, dev);
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size_t size = vma->vm_end - vma->vm_start;
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if (size > RKEP_USER_MEM_SIZE) {
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dev_warn(&pcie_rkep->pdev->dev, "mmap size is out of limitation\n");
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return -EINVAL;
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}
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if (!pcie_rkep->user_pages) {
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dev_warn(&pcie_rkep->pdev->dev, "user_pages has not been allocated yet\n");
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return -EINVAL;
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}
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addr = page_to_phys(pcie_rkep->user_pages);
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vma->vm_flags |= VM_IO;
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vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
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if (io_remap_pfn_range(vma, vma->vm_start, addr >> PAGE_SHIFT, size, vma->vm_page_prot)) {
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dev_err(&pcie_rkep->pdev->dev, "io_remap_pfn_range failed\n");
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return -EAGAIN;
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}
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return 0;
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}
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static long pcie_rkep_ioctl(struct file *file, unsigned int cmd, unsigned long args)
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{
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void __user *argp;
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struct miscdevice *miscdev = file->private_data;
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struct pcie_rkep *pcie_rkep = container_of(miscdev, struct pcie_rkep, dev);
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struct pcie_ep_dma_cache_cfg cfg;
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void __user *uarg = (void __user *)args;
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int ret;
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u64 addr;
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argp = (void __user *)args;
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switch (cmd) {
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case 0x4:
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/* get mapped physical address */
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if (!pcie_rkep->user_pages) {
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dev_warn(&pcie_rkep->pdev->dev, "user_pages has not been allocated yet\n");
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return -EINVAL;
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}
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addr = page_to_phys(pcie_rkep->user_pages);
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if (copy_to_user(argp, &addr, sizeof(addr)))
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return -EFAULT;
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break;
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case PCIE_DMA_CACHE_INVALIDE:
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ret = copy_from_user(&cfg, uarg, sizeof(cfg));
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if (ret) {
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dev_err(&pcie_rkep->pdev->dev, "failed to get copy from\n");
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return -EFAULT;
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}
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dma_sync_single_for_cpu(&pcie_rkep->pdev->dev, cfg.addr, cfg.size, DMA_FROM_DEVICE);
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break;
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case PCIE_DMA_CACHE_FLUSH:
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ret = copy_from_user(&cfg, uarg, sizeof(cfg));
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if (ret) {
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dev_err(&pcie_rkep->pdev->dev, "failed to get copy from\n");
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return -EFAULT;
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}
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dma_sync_single_for_device(&pcie_rkep->pdev->dev, cfg.addr, cfg.size,
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DMA_TO_DEVICE);
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break;
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default:
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break;
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}
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return 0;
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}
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static const struct file_operations pcie_rkep_fops = {
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.owner = THIS_MODULE,
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.open = pcie_rkep_open,
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.write = pcie_rkep_write,
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.read = pcie_rkep_read,
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.unlocked_ioctl = pcie_rkep_ioctl,
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.mmap = pcie_rkep_mmap,
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.fasync = pcie_rkep_fasync,
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.release = pcie_rkep_release,
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.llseek = no_llseek,
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};
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static inline void pcie_rkep_writel_dbi(struct pcie_rkep *pcie_rkep, u32 reg, u32 val)
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{
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writel(val, pcie_rkep->bar4 + reg);
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}
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static inline u32 pcie_rkep_readl_dbi(struct pcie_rkep *pcie_rkep, u32 reg)
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{
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return readl(pcie_rkep->bar4 + reg);
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}
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static void pcie_rkep_start_dma_rd(struct dma_trx_obj *obj, struct dma_table *cur, int ctr_off)
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{
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struct pci_dev *pdev = container_of(obj->dev, struct pci_dev, dev);
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struct pcie_rkep *pcie_rkep = pci_get_drvdata(pdev);
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pcie_rkep_writel_dbi(pcie_rkep, PCIE_DMA_OFFSET + PCIE_DMA_RD_ENB,
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cur->enb.asdword);
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pcie_rkep_writel_dbi(pcie_rkep, ctr_off + PCIE_DMA_RD_CTRL_LO,
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cur->ctx_reg.ctrllo.asdword);
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pcie_rkep_writel_dbi(pcie_rkep, ctr_off + PCIE_DMA_RD_CTRL_HI,
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cur->ctx_reg.ctrlhi.asdword);
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pcie_rkep_writel_dbi(pcie_rkep, ctr_off + PCIE_DMA_RD_XFERSIZE,
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cur->ctx_reg.xfersize);
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pcie_rkep_writel_dbi(pcie_rkep, ctr_off + PCIE_DMA_RD_SAR_PTR_LO,
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cur->ctx_reg.sarptrlo);
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pcie_rkep_writel_dbi(pcie_rkep, ctr_off + PCIE_DMA_RD_SAR_PTR_HI,
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cur->ctx_reg.sarptrhi);
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pcie_rkep_writel_dbi(pcie_rkep, ctr_off + PCIE_DMA_RD_DAR_PTR_LO,
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cur->ctx_reg.darptrlo);
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pcie_rkep_writel_dbi(pcie_rkep, ctr_off + PCIE_DMA_RD_DAR_PTR_HI,
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cur->ctx_reg.darptrhi);
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pcie_rkep_writel_dbi(pcie_rkep, PCIE_DMA_OFFSET + PCIE_DMA_RD_DOORBELL,
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cur->start.asdword);
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}
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static void pcie_rkep_start_dma_wr(struct dma_trx_obj *obj, struct dma_table *cur, int ctr_off)
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{
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struct pci_dev *pdev = container_of(obj->dev, struct pci_dev, dev);
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struct pcie_rkep *pcie_rkep = pci_get_drvdata(pdev);
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pcie_rkep_writel_dbi(pcie_rkep, PCIE_DMA_OFFSET + PCIE_DMA_WR_ENB,
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cur->enb.asdword);
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pcie_rkep_writel_dbi(pcie_rkep, ctr_off + PCIE_DMA_WR_CTRL_LO,
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cur->ctx_reg.ctrllo.asdword);
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pcie_rkep_writel_dbi(pcie_rkep, ctr_off + PCIE_DMA_WR_CTRL_HI,
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cur->ctx_reg.ctrlhi.asdword);
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pcie_rkep_writel_dbi(pcie_rkep, ctr_off + PCIE_DMA_WR_XFERSIZE,
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cur->ctx_reg.xfersize);
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pcie_rkep_writel_dbi(pcie_rkep, ctr_off + PCIE_DMA_WR_SAR_PTR_LO,
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cur->ctx_reg.sarptrlo);
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pcie_rkep_writel_dbi(pcie_rkep, ctr_off + PCIE_DMA_WR_SAR_PTR_HI,
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cur->ctx_reg.sarptrhi);
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pcie_rkep_writel_dbi(pcie_rkep, ctr_off + PCIE_DMA_WR_DAR_PTR_LO,
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cur->ctx_reg.darptrlo);
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pcie_rkep_writel_dbi(pcie_rkep, ctr_off + PCIE_DMA_WR_DAR_PTR_HI,
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cur->ctx_reg.darptrhi);
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pcie_rkep_writel_dbi(pcie_rkep, ctr_off + PCIE_DMA_WR_WEILO,
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cur->weilo.asdword);
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pcie_rkep_writel_dbi(pcie_rkep, PCIE_DMA_OFFSET + PCIE_DMA_WR_DOORBELL,
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cur->start.asdword);
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}
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static void pcie_rkep_start_dma_dwc(struct dma_trx_obj *obj, struct dma_table *table)
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{
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int dir = table->dir;
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int chn = table->chn;
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int ctr_off = PCIE_DMA_OFFSET + chn * 0x200;
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if (dir == DMA_FROM_BUS)
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pcie_rkep_start_dma_rd(obj, table, ctr_off);
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else if (dir == DMA_TO_BUS)
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pcie_rkep_start_dma_wr(obj, table, ctr_off);
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}
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static void pcie_rkep_config_dma_dwc(struct dma_table *table)
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{
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table->enb.enb = 0x1;
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table->ctx_reg.ctrllo.lie = 0x1;
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table->ctx_reg.ctrllo.rie = 0x0;
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table->ctx_reg.ctrllo.td = 0x1;
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table->ctx_reg.ctrlhi.asdword = 0x0;
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table->ctx_reg.xfersize = table->buf_size;
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if (table->dir == DMA_FROM_BUS) {
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table->ctx_reg.sarptrlo = (u32)(table->bus & 0xffffffff);
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table->ctx_reg.sarptrhi = (u32)(table->bus >> 32);
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table->ctx_reg.darptrlo = (u32)(table->local & 0xffffffff);
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table->ctx_reg.darptrhi = (u32)(table->local >> 32);
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} else if (table->dir == DMA_TO_BUS) {
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table->ctx_reg.sarptrlo = (u32)(table->local & 0xffffffff);
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table->ctx_reg.sarptrhi = (u32)(table->local >> 32);
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table->ctx_reg.darptrlo = (u32)(table->bus & 0xffffffff);
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table->ctx_reg.darptrhi = (u32)(table->bus >> 32);
|
}
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table->weilo.weight0 = 0x0;
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table->start.stop = 0x0;
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table->start.chnl = table->chn;
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}
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static int pcie_rkep_get_dma_status(struct dma_trx_obj *obj, u8 chn, enum dma_dir dir)
|
{
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struct pci_dev *pdev = container_of(obj->dev, struct pci_dev, dev);
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struct pcie_rkep *pcie_rkep = pci_get_drvdata(pdev);
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union int_status status;
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union int_clear clears;
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int ret = 0;
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|
dev_dbg(&pdev->dev, "%s %x %x\n", __func__,
|
pcie_rkep_readl_dbi(pcie_rkep, PCIE_DMA_OFFSET + PCIE_DMA_WR_INT_STATUS),
|
pcie_rkep_readl_dbi(pcie_rkep, PCIE_DMA_OFFSET + PCIE_DMA_RD_INT_STATUS));
|
|
if (dir == DMA_TO_BUS) {
|
status.asdword =
|
pcie_rkep_readl_dbi(pcie_rkep, PCIE_DMA_OFFSET + PCIE_DMA_WR_INT_STATUS);
|
if (status.donesta & BIT(chn)) {
|
clears.doneclr = BIT(chn);
|
pcie_rkep_writel_dbi(pcie_rkep, PCIE_DMA_OFFSET + PCIE_DMA_WR_INT_CLEAR,
|
clears.asdword);
|
ret = 1;
|
}
|
|
if (status.abortsta & BIT(chn)) {
|
dev_err(&pdev->dev, "%s, write abort\n", __func__);
|
clears.abortclr = BIT(chn);
|
pcie_rkep_writel_dbi(pcie_rkep, PCIE_DMA_OFFSET + PCIE_DMA_WR_INT_CLEAR,
|
clears.asdword);
|
ret = -1;
|
}
|
} else {
|
status.asdword =
|
pcie_rkep_readl_dbi(pcie_rkep, PCIE_DMA_OFFSET + PCIE_DMA_RD_INT_STATUS);
|
|
if (status.donesta & BIT(chn)) {
|
clears.doneclr = BIT(chn);
|
pcie_rkep_writel_dbi(pcie_rkep, PCIE_DMA_OFFSET + PCIE_DMA_RD_INT_CLEAR,
|
clears.asdword);
|
ret = 1;
|
}
|
|
if (status.abortsta & BIT(chn)) {
|
dev_err(&pdev->dev, "%s, read abort %x\n", __func__, status.asdword);
|
clears.abortclr = BIT(chn);
|
pcie_rkep_writel_dbi(pcie_rkep, PCIE_DMA_OFFSET + PCIE_DMA_RD_INT_CLEAR,
|
clears.asdword);
|
ret = -1;
|
}
|
}
|
|
return ret;
|
}
|
|
static int pcie_rkep_obj_handler(struct pcie_rkep *pcie_rkep, struct pci_dev *pdev)
|
{
|
union int_status wr_status, rd_status;
|
u32 irq_type;
|
u32 chn;
|
union int_clear clears;
|
|
kill_fasync(&pcie_rkep->async, SIGIO, POLL_IN);
|
irq_type = pcie_rkep->obj_info->irq_type_rc;
|
if (irq_type == OBJ_IRQ_DMA) {
|
/* DMA helper */
|
wr_status.asdword = pcie_rkep->obj_info->dma_status_rc.wr;
|
rd_status.asdword = pcie_rkep->obj_info->dma_status_rc.rd;
|
|
for (chn = 0; chn < PCIE_DMA_CHANEL_MAX_NUM; chn++) {
|
if (wr_status.donesta & BIT(chn)) {
|
if (pcie_rkep->dma_obj && pcie_rkep->dma_obj->cb) {
|
pcie_rkep->dma_obj->cb(pcie_rkep->dma_obj, chn, DMA_TO_BUS);
|
clears.doneclr = 0x1 << chn;
|
pcie_rkep->obj_info->dma_status_rc.wr &= (~clears.doneclr);
|
}
|
}
|
|
if (wr_status.abortsta & BIT(chn)) {
|
dev_err(&pdev->dev, "%s, abort\n", __func__);
|
if (pcie_rkep->dma_obj && pcie_rkep->dma_obj->cb) {
|
clears.abortclr = 0x1 << chn;
|
pcie_rkep->obj_info->dma_status_rc.wr &= (~clears.abortclr);
|
}
|
}
|
}
|
|
for (chn = 0; chn < PCIE_DMA_CHANEL_MAX_NUM; chn++) {
|
if (rd_status.donesta & BIT(chn)) {
|
if (pcie_rkep->dma_obj && pcie_rkep->dma_obj->cb) {
|
pcie_rkep->dma_obj->cb(pcie_rkep->dma_obj, chn,
|
DMA_FROM_BUS);
|
clears.doneclr = 0x1 << chn;
|
pcie_rkep->obj_info->dma_status_rc.rd &= (~clears.doneclr);
|
}
|
}
|
|
if (rd_status.abortsta & BIT(chn)) {
|
dev_err(&pdev->dev, "%s, abort\n", __func__);
|
if (pcie_rkep->dma_obj && pcie_rkep->dma_obj->cb) {
|
clears.abortclr = 0x1 << chn;
|
pcie_rkep->obj_info->dma_status_rc.rd &= (~clears.abortclr);
|
}
|
}
|
}
|
}
|
|
return 0;
|
}
|
|
static int __maybe_unused rockchip_pcie_raise_elbi_irq(struct pcie_rkep *pcie_rkep,
|
u8 interrupt_num)
|
{
|
u32 index, off;
|
|
if (interrupt_num >= (PCIE_ELBI_REG_NUM * 16)) {
|
dev_err(&pcie_rkep->pdev->dev, "elbi int num out of max count\n");
|
return -EINVAL;
|
}
|
|
index = interrupt_num / 16;
|
off = interrupt_num % 16;
|
return pci_write_config_dword(pcie_rkep->pdev, PCIE_CFG_ELBI_APP_OFFSET + 4 * index,
|
(1 << (off + 16)) | (1 << off));
|
}
|
|
static irqreturn_t pcie_rkep_pcie_interrupt(int irq, void *context)
|
{
|
struct pcie_rkep_msix_context *ctx = context;
|
struct pci_dev *pdev = ctx->dev;
|
struct pcie_rkep *pcie_rkep = pci_get_drvdata(pdev);
|
|
if (!pcie_rkep)
|
return IRQ_HANDLED;
|
|
if (pcie_rkep->msix_enable)
|
dev_info(&pdev->dev, "MSI-X is triggered for 0x%x\n", ctx->msg_id);
|
|
else /* pcie_rkep->msi_enable */ {
|
/*
|
* The msi 0 is the dedicated interrupt for obj to issue remote rc device.
|
*/
|
if (irq == pci_irq_vector(pcie_rkep->pdev, PCIe_CLIENT_MSI_IRQ_OBJ))
|
pcie_rkep_obj_handler(pcie_rkep, pdev);
|
}
|
|
return IRQ_HANDLED;
|
}
|
|
static int __maybe_unused pcie_rkep_request_msi_irq(struct pcie_rkep *pcie_rkep)
|
{
|
int nvec, ret = -EINVAL, i, j;
|
|
/* Using msi as default */
|
nvec = pci_alloc_irq_vectors(pcie_rkep->pdev, 1, RKEP_NUM_MSI_VECTORS, PCI_IRQ_MSI);
|
if (nvec < 0)
|
return nvec;
|
|
if (nvec != RKEP_NUM_MSI_VECTORS)
|
dev_err(&pcie_rkep->pdev->dev, "only allocate %d msi interrupt\n", nvec);
|
|
for (i = 0; i < nvec; i++) {
|
pcie_rkep->msi_ctx[i].dev = pcie_rkep->pdev;
|
pcie_rkep->msi_ctx[i].msg_id = i;
|
pcie_rkep->msi_ctx[i].name =
|
devm_kzalloc(&pcie_rkep->pdev->dev, RKEP_NUM_MSIX_VECTORS, GFP_KERNEL);
|
sprintf(pcie_rkep->msi_ctx[i].name, "%s-%d\n", pcie_rkep->dev.name, i);
|
ret = request_irq(pci_irq_vector(pcie_rkep->pdev, i),
|
pcie_rkep_pcie_interrupt, IRQF_SHARED,
|
pcie_rkep->msi_ctx[i].name, &pcie_rkep->msi_ctx[i]);
|
if (ret)
|
break;
|
}
|
|
if (ret) {
|
for (j = 0; j < i; j++)
|
free_irq(pci_irq_vector(pcie_rkep->pdev, j), &pcie_rkep->msi_ctx[j]);
|
pci_disable_msi(pcie_rkep->pdev);
|
dev_err(&pcie_rkep->pdev->dev, "fail to allocate msi interrupt\n");
|
} else {
|
pcie_rkep->msi_enable = true;
|
dev_err(&pcie_rkep->pdev->dev, "success to request msi irq\n");
|
}
|
|
return ret;
|
}
|
|
static int __maybe_unused pcie_rkep_request_msix_irq(struct pcie_rkep *pcie_rkep)
|
{
|
int ret, i, j;
|
|
for (i = 0; i < RKEP_NUM_MSIX_VECTORS; i++)
|
pcie_rkep->msix_entries[i].entry = i;
|
|
ret = pci_enable_msix_exact(pcie_rkep->pdev, pcie_rkep->msix_entries,
|
RKEP_NUM_MSIX_VECTORS);
|
if (ret)
|
return ret;
|
|
for (i = 0; i < RKEP_NUM_MSIX_VECTORS; i++) {
|
pcie_rkep->msix_ctx[i].dev = pcie_rkep->pdev;
|
pcie_rkep->msix_ctx[i].msg_id = i;
|
pcie_rkep->msix_ctx[i].name =
|
devm_kzalloc(&pcie_rkep->pdev->dev, RKEP_NUM_MSIX_VECTORS, GFP_KERNEL);
|
sprintf(pcie_rkep->msix_ctx[i].name, "%s-%d\n", pcie_rkep->dev.name, i);
|
ret = request_irq(pcie_rkep->msix_entries[i].vector,
|
pcie_rkep_pcie_interrupt, 0, pcie_rkep->msix_ctx[i].name,
|
&pcie_rkep->msix_ctx[i]);
|
|
if (ret)
|
break;
|
}
|
|
if (ret) {
|
for (j = 0; j < i; j++)
|
free_irq(pcie_rkep->msix_entries[j].vector, &pcie_rkep->msix_ctx[j]);
|
pci_disable_msix(pcie_rkep->pdev);
|
dev_err(&pcie_rkep->pdev->dev, "fail to allocate msi-x interrupt\n");
|
} else {
|
pcie_rkep->msix_enable = true;
|
dev_err(&pcie_rkep->pdev->dev, "success to request msi-x irq\n");
|
}
|
|
return ret;
|
}
|
|
static int rkep_loadfile(struct device *dev, char *path, void __iomem *bar, int pos)
|
{
|
struct file *p_file = NULL;
|
loff_t size;
|
loff_t offset;
|
|
p_file = filp_open(path, O_RDONLY | O_LARGEFILE, 0);
|
if (IS_ERR(p_file) || p_file == NULL) {
|
dev_err(dev, "unable to open file: %s\n", path);
|
|
return -ENODEV;
|
}
|
|
size = i_size_read(file_inode(p_file));
|
dev_info(dev, "%s file %s size %lld to %p\n", __func__, path, size, bar + pos);
|
|
offset = 0;
|
kernel_read(p_file, bar + pos, size, &offset);
|
|
dev_info(dev, "kernel_read size %lld from %s to %p\n", size, path, bar + pos);
|
|
return 0;
|
}
|
|
#define RKEP_CMD_LOADER_RUN 0x524b4501
|
static ssize_t rkep_store(struct device *dev, struct device_attribute *attr,
|
const char *buf, size_t count)
|
{
|
struct pcie_rkep *pcie_rkep = dev_get_drvdata(dev);
|
u32 val;
|
|
if (kstrtou32(buf, 0, &val))
|
return -EINVAL;
|
|
dev_info(dev, "%s val %d\n", __func__, val);
|
if (val == 1)
|
rkep_loadfile(dev, "/data/uboot.img", pcie_rkep->bar2, 0);
|
else if (val == 2)
|
rkep_loadfile(dev, "/data/boot.img", pcie_rkep->bar2, 0x400000);
|
else if (val == 3)
|
writel(RKEP_CMD_LOADER_RUN, pcie_rkep->bar0 + 0x400);
|
|
dev_info(dev, "%s done\n", __func__);
|
|
return count;
|
}
|
static DEVICE_ATTR_WO(rkep);
|
|
static int pcie_rkep_probe(struct pci_dev *pdev, const struct pci_device_id *id)
|
{
|
int ret, i;
|
struct pcie_rkep *pcie_rkep;
|
u8 *name;
|
u16 val;
|
|
pcie_rkep = devm_kzalloc(&pdev->dev, sizeof(*pcie_rkep), GFP_KERNEL);
|
if (!pcie_rkep)
|
return -ENOMEM;
|
|
ret = pci_enable_device(pdev);
|
if (ret) {
|
dev_err(&pdev->dev, "pci_enable_device failed %d\n", ret);
|
goto err_pci_enable_dev;
|
}
|
|
ret = pci_request_regions(pdev, DRV_NAME);
|
if (ret) {
|
dev_err(&pdev->dev, "pci_request_regions failed %d\n", ret);
|
goto err_req_regions;
|
}
|
|
pcie_rkep->bar0 = pci_iomap(pdev, 0, 0);
|
if (!pcie_rkep->bar0) {
|
dev_err(&pdev->dev, "pci_iomap bar0 failed\n");
|
ret = -ENOMEM;
|
goto err_pci_iomap;
|
}
|
pcie_rkep->obj_info = (struct pcie_ep_obj_info *)pcie_rkep->bar0;
|
dev_dbg(&pdev->dev, "get bar0 address is %p\n", pcie_rkep->bar0);
|
|
pcie_rkep->bar2 = pci_iomap(pdev, 2, 0);
|
if (!pcie_rkep->bar2) {
|
dev_err(&pdev->dev, "pci_iomap bar2 failed");
|
ret = -ENOMEM;
|
goto err_pci_iomap;
|
}
|
dev_dbg(&pdev->dev, "get bar2 address is %p\n", pcie_rkep->bar2);
|
|
pcie_rkep->bar4 = pci_iomap(pdev, 4, 0);
|
if (!pcie_rkep->bar4) {
|
dev_err(&pdev->dev, "pci_iomap bar4 failed\n");
|
ret = -ENOMEM;
|
goto err_pci_iomap;
|
}
|
|
dev_dbg(&pdev->dev, "get bar4 address is %p\n", pcie_rkep->bar4);
|
|
name = devm_kzalloc(&pdev->dev, MISC_DEV_NAME_MAX_LENGTH, GFP_KERNEL);
|
if (!name) {
|
ret = -ENOMEM;
|
goto err_pci_iomap;
|
}
|
sprintf(name, "%s-%s", DRV_NAME, dev_name(&pdev->dev));
|
pcie_rkep->dev.minor = MISC_DYNAMIC_MINOR;
|
pcie_rkep->dev.name = name;
|
pcie_rkep->dev.fops = &pcie_rkep_fops;
|
pcie_rkep->dev.parent = NULL;
|
|
ret = misc_register(&pcie_rkep->dev);
|
if (ret) {
|
dev_err(&pdev->dev, "failed to register misc device.\n");
|
goto err_pci_iomap;
|
}
|
|
pcie_rkep->pdev = pdev; /* Save pci device struct */
|
|
pci_set_drvdata(pdev, pcie_rkep);
|
|
ret = pcie_rkep_request_msi_irq(pcie_rkep);
|
if (ret)
|
goto err_register_irq;
|
|
pcie_rkep->dma_obj = pcie_dw_dmatest_register(&pdev->dev, true);
|
if (IS_ERR(pcie_rkep->dma_obj)) {
|
dev_err(&pcie_rkep->pdev->dev, "failed to prepare dmatest\n");
|
ret = -EINVAL;
|
goto err_register_obj;
|
}
|
|
if (pcie_rkep->dma_obj) {
|
pcie_rkep->dma_obj->start_dma_func = pcie_rkep_start_dma_dwc;
|
pcie_rkep->dma_obj->config_dma_func = pcie_rkep_config_dma_dwc;
|
pcie_rkep->dma_obj->get_dma_status = pcie_rkep_get_dma_status;
|
}
|
|
#if IS_ENABLED(CONFIG_PCIE_FUNC_RKEP_USERPAGES)
|
pcie_rkep->user_pages =
|
alloc_contig_pages(RKEP_USER_MEM_SIZE >> PAGE_SHIFT, GFP_KERNEL, 0, NULL);
|
if (!pcie_rkep->user_pages) {
|
dev_err(&pcie_rkep->pdev->dev, "failed to allocate contiguous pages\n");
|
ret = -EINVAL;
|
goto err_register_obj;
|
}
|
dev_err(&pdev->dev, "successfully allocate continuouse buffer for userspace\n");
|
#endif
|
|
pci_read_config_word(pcie_rkep->pdev, PCI_VENDOR_ID, &val);
|
dev_info(&pdev->dev, "vid=%x\n", val);
|
pci_read_config_word(pcie_rkep->pdev, PCI_DEVICE_ID, &val);
|
dev_info(&pdev->dev, "did=%x\n", val);
|
dev_info(&pdev->dev, "obj_info magic=%x, ver=%x\n", pcie_rkep->obj_info->magic,
|
pcie_rkep->obj_info->version);
|
|
device_create_file(&pdev->dev, &dev_attr_rkep);
|
|
return 0;
|
err_register_obj:
|
if (pcie_rkep->msix_enable) {
|
for (i = 0; i < RKEP_NUM_MSIX_VECTORS; i++)
|
free_irq(pcie_rkep->msix_entries[i].vector, &pcie_rkep->msix_ctx[i]);
|
pci_disable_msix(pdev);
|
} else if (pcie_rkep->msi_enable) {
|
for (i = 0; i < RKEP_NUM_MSI_VECTORS; i++) {
|
if (pcie_rkep->msi_ctx[i].dev)
|
free_irq(pci_irq_vector(pdev, i), &pcie_rkep->msi_ctx[i]);
|
}
|
|
pci_disable_msi(pcie_rkep->pdev);
|
}
|
err_register_irq:
|
misc_deregister(&pcie_rkep->dev);
|
err_pci_iomap:
|
if (pcie_rkep->bar0)
|
pci_iounmap(pdev, pcie_rkep->bar0);
|
if (pcie_rkep->bar2)
|
pci_iounmap(pdev, pcie_rkep->bar2);
|
if (pcie_rkep->bar4)
|
pci_iounmap(pdev, pcie_rkep->bar4);
|
pci_release_regions(pdev);
|
err_req_regions:
|
pci_disable_device(pdev);
|
err_pci_enable_dev:
|
|
return ret;
|
}
|
|
static void pcie_rkep_remove(struct pci_dev *pdev)
|
{
|
struct pcie_rkep *pcie_rkep = pci_get_drvdata(pdev);
|
int i;
|
|
device_remove_file(&pdev->dev, &dev_attr_rkep);
|
#if IS_ENABLED(CONFIG_PCIE_FUNC_RKEP_USERPAGES)
|
free_contig_range(page_to_pfn(pcie_rkep->user_pages), RKEP_USER_MEM_SIZE >> PAGE_SHIFT);
|
#endif
|
pci_iounmap(pdev, pcie_rkep->bar0);
|
pci_release_regions(pdev);
|
pci_disable_device(pdev);
|
misc_deregister(&pcie_rkep->dev);
|
|
if (pcie_rkep->msix_enable) {
|
for (i = 0; i < RKEP_NUM_MSIX_VECTORS; i++)
|
free_irq(pcie_rkep->msix_entries[i].vector, &pcie_rkep->msix_ctx[i]);
|
pci_disable_msix(pdev);
|
} else if (pcie_rkep->msi_enable) {
|
for (i = 0; i < RKEP_NUM_MSI_VECTORS; i++)
|
if (pcie_rkep->msi_ctx[i].dev)
|
free_irq(pci_irq_vector(pdev, i), &pcie_rkep->msi_ctx[i]);
|
pci_disable_msi(pcie_rkep->pdev);
|
}
|
}
|
|
static const struct pci_device_id pcie_rkep_pcidev_id[] = {
|
{ PCI_VDEVICE(ROCKCHIP, 0x356a), 1, },
|
{ }
|
};
|
MODULE_DEVICE_TABLE(pcie_rkep, pcie_rkep_pcidev_id);
|
|
static struct pci_driver pcie_rkep_driver = {
|
.name = DRV_NAME,
|
.id_table = pcie_rkep_pcidev_id,
|
.probe = pcie_rkep_probe,
|
.remove = pcie_rkep_remove,
|
};
|
module_pci_driver(pcie_rkep_driver);
|
|
MODULE_DESCRIPTION("Rockchip pcie-rkep demo function driver");
|
MODULE_LICENSE("GPL");
|
MODULE_IMPORT_NS(VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver);
|
