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pci: support disabling msis

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This commit is contained in:
Alexander Boettcher 2015-05-15 11:27:05 +02:00 committed by Christian Helmuth
parent d9825cd708
commit 51b79d7da6
2 changed files with 22 additions and 6 deletions
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7
repos/os/src/drivers/pci/pci_device_component.h
View File

@ -162,13 +162,13 @@ class Pci::Device_component : public Genode::Rpc_object<Pci::Device>,
Device_component(Device_config device_config, Genode::addr_t addr,
Genode::Rpc_entrypoint *ep,
Pci::Session_component * session,
bool rewrite_irq_line)
bool rewrite_irq_line, bool use_msi)
:
_device_config(device_config), _config_space(addr),
_ep(ep), _session(session),
_irq_line(_device_config.read(&_config_access, PCI_IRQ_LINE,
Pci::Device::ACCESS_8BIT)),
_irq_session(_disable_msi(_irq_line), _msi_cap() ? _config_space : ~0UL),
_irq_session(_disable_msi(_irq_line), (!use_msi || !_msi_cap()) ? ~0UL : _config_space),
_rewrite_irq_line(rewrite_irq_line),
_slab_ioport(0, &_slab_ioport_block),
_slab_iomem(0, &_slab_iomem_block)
@ -237,7 +237,8 @@ class Pci::Device_component : public Genode::Rpc_object<Pci::Device>,
Device_component(Genode::Rpc_entrypoint * ep,
Pci::Session_component * session, unsigned irq)
:
_config_space(~0UL), _ep(ep), _session(session),
_config_space(~0UL),
_ep(ep), _session(session),
_irq_line(irq),
_irq_session(_irq_line, _config_space),
_slab_ioport(0, &_slab_ioport_block),

21
repos/os/src/drivers/pci/pci_session_component.h
View File

@ -160,7 +160,22 @@ namespace Pci {
return ~0U;
}
/*
/**
* Check whether msi usage was explicitly switched off
*/
bool msi_usage()
{
try {
char mode[8];
_policy.attribute("irq_mode").value(mode, sizeof(mode));
if (!Genode::strcmp("nomsi", mode))
return false;
} catch (Genode::Xml_node::Nonexistent_attribute) { }
return true;
}
/**
* Check device usage according to session policy
*/
bool permit_device(const char * name)
@ -186,7 +201,7 @@ namespace Pci {
return false;
}
/*
/**
* Check according session policy device usage
*/
bool permit_device(Genode::uint8_t b, Genode::uint8_t d,
@ -504,7 +519,7 @@ namespace Pci {
*/
try {
Device_component * dev = new (_device_slab) Device_component(config, config_space, _ep, this,
!Genode::strcmp(_label.string(), "acpi_drv"));
!Genode::strcmp(_label.string(), "acpi_drv"), msi_usage());
/* if more than one driver uses the device - warn about */
if (bdf_in_use.get(Device_config::MAX_BUSES * bus +