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PCI/portdrv: Remove unused PCIE_PORT_SERVICE_VC 

No driver registers for PCIE_PORT_SERVICE_VC, so remove it.

This removes the VC "service" files from /sys/bus/pci_express/devices,
e.g., 0000:07:00.0:pcie108, 0000:08:04.0:pcie208 (all the files that
contained "8" as the last digit of the "pcieXXX" part).  The port driver
created these files for PCIe port devices that have a VC Capability.

Since this reduces PCIE_PORT_DEVICE_MAXSERVICES and moves DPC down into the
spot where VC used to be, the DPC sysfs files will now be named "pcieXX8".
I don't think there's anything useful userspace can do with those files, so
I hope nobody cares about these filenames.

There is no VC driver that calls pcie_port_service_register(), so there
never was a /sys/bus/pci_express/drivers/vc directory.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Bjorn Helgaas 2018-03-09 11:21:24 -06:00 коммит произвёл Bjorn Helgaas
Родитель c6c889d932
Коммит 168f3ae595
3 изменённых файлов: 7 добавлений и 15 удалений
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6
drivers/pci/pcie/portdrv.h
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@ -19,12 +19,10 @@
#define PCIE_PORT_SERVICE_AER (1 << PCIE_PORT_SERVICE_AER_SHIFT)
#define PCIE_PORT_SERVICE_HP_SHIFT 2 /* Native Hotplug */
#define PCIE_PORT_SERVICE_HP (1 << PCIE_PORT_SERVICE_HP_SHIFT)
#define PCIE_PORT_SERVICE_VC_SHIFT 3 /* Virtual Channel */
#define PCIE_PORT_SERVICE_VC (1 << PCIE_PORT_SERVICE_VC_SHIFT)
#define PCIE_PORT_SERVICE_DPC_SHIFT 4 /* Downstream Port Containment */
#define PCIE_PORT_SERVICE_DPC_SHIFT 3 /* Downstream Port Containment */
#define PCIE_PORT_SERVICE_DPC (1 << PCIE_PORT_SERVICE_DPC_SHIFT)
#define PCIE_PORT_DEVICE_MAXSERVICES 5
#define PCIE_PORT_DEVICE_MAXSERVICES 4
/* Port Type */
#define PCIE_ANY_PORT (~0)

2
drivers/pci/pcie/portdrv_acpi.c
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@ -47,7 +47,7 @@ void pcie_port_acpi_setup(struct pci_dev *port, int *srv_mask)
flags = root->osc_control_set;
*srv_mask = PCIE_PORT_SERVICE_VC | PCIE_PORT_SERVICE_DPC;
*srv_mask = PCIE_PORT_SERVICE_DPC;
if (flags & OSC_PCI_EXPRESS_NATIVE_HP_CONTROL)
*srv_mask |= PCIE_PORT_SERVICE_HP;
if (flags & OSC_PCI_EXPRESS_PME_CONTROL)

14
drivers/pci/pcie/portdrv_core.c
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@ -188,10 +188,8 @@ legacy_irq:
if (ret < 0)
return -ENODEV;
for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) {
if (i != PCIE_PORT_SERVICE_VC_SHIFT)
irqs[i] = pci_irq_vector(dev, 0);
}
for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++)
irqs[i] = pci_irq_vector(dev, 0);
return 0;
}
@ -211,8 +209,7 @@ static int get_port_device_capability(struct pci_dev *dev)
int services = 0;
int cap_mask = 0;
cap_mask = PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP
| PCIE_PORT_SERVICE_VC;
cap_mask = PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP;
if (pci_aer_available())
cap_mask |= PCIE_PORT_SERVICE_AER | PCIE_PORT_SERVICE_DPC;
@ -239,9 +236,6 @@ static int get_port_device_capability(struct pci_dev *dev)
*/
pci_disable_pcie_error_reporting(dev);
}
/* VC support */
if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_VC))
services |= PCIE_PORT_SERVICE_VC;
/* Root ports are capable of generating PME too */
if ((cap_mask & PCIE_PORT_SERVICE_PME)
&& pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT) {
@ -331,7 +325,7 @@ int pcie_port_device_register(struct pci_dev *dev)
*/
status = pcie_init_service_irqs(dev, irqs, capabilities);
if (status) {
capabilities &= PCIE_PORT_SERVICE_VC | PCIE_PORT_SERVICE_HP;
capabilities &= PCIE_PORT_SERVICE_HP;
if (!capabilities)
goto error_disable;
}