It's disabled by default. When enabled, and if the device exposes both
MSI and MSI-X capabilities: MSI-X will be selected and MSI disabled on
the device.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
This enables software MSI "multi-vector" feature, letting the user to
register an isr handler per-MSI message.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Though it was noted that pcie_get_cap() is only used by MSI code so far,
there is no need to put it in msi code. If unused, linker will nuke it.
So let's move things to where it belongs to.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
An address might be made for 64bit though it's lower 32 bits are made of
0. Also Simplifying the overall by removing a useless variable.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
currently pcie_get_mbar only returns the physical address.
This changes the function to return the size of the mbar and
the flags (IO Bar vs MEM BAR).
Signed-off-by: Maximilian Bachmann <m.bachmann@acontis.com>
There are x86 platforms where the IRQ configuration register for PCIe
is not pre-populated and the OS needs to assign a number dynamically
by writing to the register.
In order to allocate interrupts we have to know which ones have been
hard-coded in device tree. We accomplish this by collecting these
values through the IRQ_CONNECT() macro and placing them in a dedicated
linker section (in ROM).
The full set of allocated interrupts are managed through a bitmap, and
the pre-allocated values (from the linker section) are inserted into
this upon initial runtime access.
This patch introduces a new pcie_alloc_irq() API that drivers can use
to allocate interrupt line numbers. The two in-tree drivers that were
using this API (I2C and UART) are converted to use the new API.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
With this refactoring of pcie directory, RC drivers are placed under
host/ directory, EP drivers are placed under endpoint/ directory and
they are completely independent of each other.
Signed-off-by: Abhishek Shah <abhishek.shah@broadcom.com>
Tomasz Bursztyka