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Commit bd9a341e authored by Tony Truong's avatar Tony Truong
Browse files

msm: pcie: add sysfs entry for PCIe enumeration 



Create a sysfs entry for each RC (root complex) so
that clients can manually trigger enumeration from
userspace.

Change-Id: I88b1276d95a2a894759a2f122621e10e171d6528
Signed-off-by: default avatarTony Truong <truong@codeaurora.org>
parent fdbd5677

drivers/pci/host/pci-msm.c

+50 −0
Original line number Diff line number Diff line
@@ -2513,6 +2513,48 @@ int msm_pcie_debug_info(struct pci_dev *dev, u32 option, u32 base, 
}

EXPORT_SYMBOL(msm_pcie_debug_info);



#ifdef CONFIG_SYSFS

static ssize_t msm_pcie_enumerate_store(struct device *dev,

					struct device_attribute *attr,

					const char *buf, size_t count)

{

	struct msm_pcie_dev_t *pcie_dev = (struct msm_pcie_dev_t *)

						dev_get_drvdata(dev);



	if (pcie_dev)

		msm_pcie_enumerate(pcie_dev->rc_idx);



	return count;

}



static DEVICE_ATTR(enumerate, 0200, NULL, msm_pcie_enumerate_store);



static void msm_pcie_sysfs_init(struct msm_pcie_dev_t *dev)

{

	int ret;



	ret = device_create_file(&dev->pdev->dev, &dev_attr_enumerate);

	if (ret)

		PCIE_DBG_FS(dev,

			"RC%d: failed to create sysfs enumerate node\n",

			dev->rc_idx);

}



static void msm_pcie_sysfs_exit(struct msm_pcie_dev_t *dev)

{

	if (dev->pdev)

		device_remove_file(&dev->pdev->dev, &dev_attr_enumerate);

}

#else

static void msm_pcie_sysfs_init(struct msm_pcie_dev_t *dev)

{

}



static void msm_pcie_sysfs_exit(struct msm_pcie_dev_t *dev)

{

}

#endif



#ifdef CONFIG_DEBUG_FS

static struct dentry *dent_msm_pcie;

static struct dentry *dfile_rc_sel;
@@ -6286,6 +6328,9 @@ static int msm_pcie_probe(struct platform_device *pdev) 
		msm_pcie_dev[rc_idx].pcidev_table[i].registered = true;

	}



	dev_set_drvdata(&msm_pcie_dev[rc_idx].pdev->dev, &msm_pcie_dev[rc_idx]);

	msm_pcie_sysfs_init(&msm_pcie_dev[rc_idx]);



	ret = msm_pcie_get_resources(&msm_pcie_dev[rc_idx],

				msm_pcie_dev[rc_idx].pdev);
@@ -6499,11 +6544,16 @@ int __init pcie_init(void) 


static void __exit pcie_exit(void)

{

	int i;



	PCIE_GEN_DBG("pcie:%s.\n", __func__);



	platform_driver_unregister(&msm_pcie_driver);



	msm_pcie_debugfs_exit();



	for (i = 0; i < MAX_RC_NUM; i++)

		msm_pcie_sysfs_exit(&msm_pcie_dev[i]);

}



subsys_initcall_sync(pcie_init);