pm8001_pci_probe分析(一)

最新推荐文章于 2025-02-10 02:00:26 发布

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最新推荐文章于 2025-02-10 02:00:26 发布 · 1.3k 阅读

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CC 4.0 BY-SA版权

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#linux kernel

本文主要分析了Linux内核中pm8001_pci_probe函数的实现，详细解读了关键代码段，并提供了完整代码的下载链接，为后续深入探讨打下基础。

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/**
 * pm8001_pci_probe - probe supported device
 * @pdev: pci device which kernel has been prepared for.
 * @ent: pci device id
 *
 * This function is the main initialization function, when register a new
 * pci driver it is invoked, all struct and hardware initialization should be
 * done here, also, register interrupt
 */
static int __devinit pm8001_pci_probe(struct pci_dev *pdev,
	const struct pci_device_id *ent)
{
	int rc;
	u32	pci_reg;
	struct pm8001_hba_info *pm8001_ha;//HBA在LLD中的表示
	struct Scsi_Host *shost = NULL;
	const struct pm8001_chip_info *chip;

	dev_printk(KERN_INFO, &pdev->dev,
		"pm8001: driver version %s, %s\n", DRV_VERSION, DRV_DATE);
	rc = pci_enable_device(pdev);//使能pci设备，即开启设备的地址映射和中断等
	if (rc) {
		dev_printk(KERN_INFO, &pdev->dev,
		"pm8001: failed to enable device \n");
		goto err_out_enable;
	}
	pci_set_master(pdev);//set pci device dma master mode
	/*
	 * Enable pci slot busmaster by setting pci command register.