Commit 42da7911 authored by Chunguang Xu's avatar Chunguang Xu Committed by Lorenzo Pieralisi
Browse files

PCI: vmd: Assign a number to each VMD controller 

If the system has multiple VMD controllers, the driver does not assign
a number to each controller, so when analyzing the interrupt through
/proc/interrupts, the names of all controllers are the same, which is
not very convenient for problem analysis. Here, try to assign a number
to each VMD controller.

Link: https://lore.kernel.org/r/1631884404-24141-1-git-send-email-brookxu.cn@gmail.com


Signed-off-by: default avatarChunguang Xu <brookxu@tencent.com>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: default avatarJon Derrick <jonathan.derrick@intel.com>
Reviewed-by: default avatarKrzysztof Wilczyński <kw@linux.com>
parent e4e737bb

drivers/pci/controller/vmd.c

+33 −8
Original line number Diff line number Diff line
@@ -70,6 +70,8 @@ enum vmd_features { 
	VMD_FEAT_CAN_BYPASS_MSI_REMAP		= (1 << 4),

};



static DEFINE_IDA(vmd_instance_ida);



/*

 * Lock for manipulating VMD IRQ lists.

 */
@@ -120,6 +122,8 @@ struct vmd_dev { 
	struct pci_bus		*bus;

	u8			busn_start;

	u8			first_vec;

	char			*name;

	int			instance;

};



static inline struct vmd_dev *vmd_from_bus(struct pci_bus *bus)
@@ -650,7 +654,7 @@ static int vmd_alloc_irqs(struct vmd_dev *vmd) 
		INIT_LIST_HEAD(&vmd->irqs[i].irq_list);

		err = devm_request_irq(&dev->dev, pci_irq_vector(dev, i),

				       vmd_irq, IRQF_NO_THREAD,

				       "vmd", &vmd->irqs[i]);

				       vmd->name, &vmd->irqs[i]);

		if (err)

			return err;

	}
@@ -834,18 +838,32 @@ static int vmd_probe(struct pci_dev *dev, const struct pci_device_id *id) 
		return -ENOMEM;



	vmd->dev = dev;

	vmd->instance = ida_simple_get(&vmd_instance_ida, 0, 0, GFP_KERNEL);

	if (vmd->instance < 0)

		return vmd->instance;



	vmd->name = kasprintf(GFP_KERNEL, "vmd%d", vmd->instance);

	if (!vmd->name) {

		err = -ENOMEM;

		goto out_release_instance;

	}



	err = pcim_enable_device(dev);

	if (err < 0)

		return err;

		goto out_release_instance;



	vmd->cfgbar = pcim_iomap(dev, VMD_CFGBAR, 0);

	if (!vmd->cfgbar)

		return -ENOMEM;

	if (!vmd->cfgbar) {

		err = -ENOMEM;

		goto out_release_instance;

	}



	pci_set_master(dev);

	if (dma_set_mask_and_coherent(&dev->dev, DMA_BIT_MASK(64)) &&

	    dma_set_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32)))

		return -ENODEV;

	    dma_set_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32))) {

		err = -ENODEV;

		goto out_release_instance;

	}



	if (features & VMD_FEAT_OFFSET_FIRST_VECTOR)

		vmd->first_vec = 1;
@@ -854,11 +872,16 @@ static int vmd_probe(struct pci_dev *dev, const struct pci_device_id *id) 
	pci_set_drvdata(dev, vmd);

	err = vmd_enable_domain(vmd, features);

	if (err)

		return err;

		goto out_release_instance;



	dev_info(&vmd->dev->dev, "Bound to PCI domain %04x\n",

		 vmd->sysdata.domain);

	return 0;



 out_release_instance:

	ida_simple_remove(&vmd_instance_ida, vmd->instance);

	kfree(vmd->name);

	return err;

}



static void vmd_cleanup_srcu(struct vmd_dev *vmd)
@@ -879,6 +902,8 @@ static void vmd_remove(struct pci_dev *dev) 
	vmd_cleanup_srcu(vmd);

	vmd_detach_resources(vmd);

	vmd_remove_irq_domain(vmd);

	ida_simple_remove(&vmd_instance_ida, vmd->instance);

	kfree(vmd->name);

}



#ifdef CONFIG_PM_SLEEP
@@ -903,7 +928,7 @@ static int vmd_resume(struct device *dev) 
	for (i = 0; i < vmd->msix_count; i++) {

		err = devm_request_irq(dev, pci_irq_vector(pdev, i),

				       vmd_irq, IRQF_NO_THREAD,

				       "vmd", &vmd->irqs[i]);

				       vmd->name, &vmd->irqs[i]);

		if (err)

			return err;

	}