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Subject[RESEND PATCH] PCI: vmd: assign a number to each vmd controller
Date
From: Chunguang Xu <brookxu@tencent.com>

If the system has multiple vmd controllers, the current vmd driver
does not assign a number to each controller, so when analyzing the
interrupt through /proc/interrupt, 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.

Signed-off-by: Chunguang Xu <brookxu@tencent.com>
Reviewed-by: Jon Derrick <jonathan.derrick@intel.com>
---
drivers/pci/controller/vmd.c | 58 ++++++++++++++++++++++++++++++++++----------
1 file changed, 45 insertions(+), 13 deletions(-)

diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c
index e3fcdfe..c334396 100644
--- a/drivers/pci/controller/vmd.c
+++ b/drivers/pci/controller/vmd.c
@@ -69,6 +69,8 @@ enum vmd_features {
VMD_FEAT_CAN_BYPASS_MSI_REMAP = (1 << 4),
};

+static DEFINE_IDA(vmd_instance_ida);
+
/*
* Lock for manipulating VMD IRQ lists.
*/
@@ -119,6 +121,8 @@ 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)
@@ -599,7 +603,7 @@ 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;
}
@@ -769,28 +773,48 @@ static int vmd_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
unsigned long features = (unsigned long) id->driver_data;
struct vmd_dev *vmd;
- int err;
+ int err = 0;

- if (resource_size(&dev->resource[VMD_CFGBAR]) < (1 << 20))
- return -ENOMEM;
+ if (resource_size(&dev->resource[VMD_CFGBAR]) < (1 << 20)) {
+ err = -ENOMEM;
+ goto out;
+ }

vmd = devm_kzalloc(&dev->dev, sizeof(*vmd), GFP_KERNEL);
- if (!vmd)
- return -ENOMEM;
+ if (!vmd) {
+ err = -ENOMEM;
+ goto out;
+ }

vmd->dev = dev;
+ vmd->instance = ida_simple_get(&vmd_instance_ida, 0, 0, GFP_KERNEL);
+ if (vmd->instance < 0) {
+ err = vmd->instance;
+ goto out;
+ }
+
+ 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;
@@ -799,11 +823,17 @@ 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);
+ out:
+ return err;
}

static void vmd_cleanup_srcu(struct vmd_dev *vmd)
@@ -824,6 +854,8 @@ 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
@@ -848,7 +880,7 @@ 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;
}
--
1.8.3.1
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