linux.git/include/linux/pci-epc.h, branch v6.1

PCI: endpoint: Add virtual function number in pci_epc ops

2021-08-19T13:13:28+00:00

Add virtual function number in pci_epc ops. EPC controller driver
can perform virtual function specific initialization based on the
virtual function number.

Link: https://lore.kernel.org/r/20210819123343.1951-5-kishon@ti.com
Signed-off-by: Kishon Vijay Abraham I 
Signed-off-by: Lorenzo Pieralisi

PCI: Fix kernel-doc formatting

2021-07-06T15:37:46+00:00

Fix kernel-doc formatting throughout drivers/pci and related include files.
No change to functionality intended.

Check for warnings:

  $ find include drivers/pci -type f -path "*pci*.[ch]" | xargs scripts/kernel-doc -none

[bhelgaas: squashed to one commit]
Link: https://lore.kernel.org/r/20210509030237.368540-1-kw@linux.com
Link: https://lore.kernel.org/r/20210703151306.1922450-1-kw@linux.com
Link: https://lore.kernel.org/r/20210703151306.1922450-2-kw@linux.com
Link: https://lore.kernel.org/r/20210703151306.1922450-3-kw@linux.com
Link: https://lore.kernel.org/r/20210703151306.1922450-4-kw@linux.com
Link: https://lore.kernel.org/r/20210703151306.1922450-5-kw@linux.com
Signed-off-by: Krzysztof Wilczyński 
Signed-off-by: Bjorn Helgaas

PCI: endpoint: Add pci_epc_ops to map MSI IRQ

2021-02-23T20:11:13+00:00

Add pci_epc_ops to map physical address to MSI address and return MSI data.
The physical address is an address in the outbound region. This is required
to implement doorbell functionality of NTB (non-transparent bridge) wherein
EPC on either side of the interface (primary and secondary) can directly
write to the physical address (in outbound region) of the other interface
to ring doorbell using MSI.

Link: https://lore.kernel.org/r/20210201195809.7342-9-kishon@ti.com
Signed-off-by: Kishon Vijay Abraham I 
Signed-off-by: Lorenzo Pieralisi 
Signed-off-by: Bjorn Helgaas

PCI: endpoint: Add support to associate secondary EPC with EPF

2021-02-23T20:10:51+00:00

In the case of standard endpoint functions, only one endpoint controller
(EPC) will be associated with an endpoint function (EPF). However for
providing NTB (non transparent bridge) functionality, two EPCs should be
associated with a single EPF.  Add support to associate secondary EPC with
EPF. This is in preparation for adding NTB endpoint function driver.

Link: https://lore.kernel.org/r/20210201195809.7342-7-kishon@ti.com
Signed-off-by: Kishon Vijay Abraham I 
Signed-off-by: Lorenzo Pieralisi 
Signed-off-by: Bjorn Helgaas

PCI: endpoint: Make *_free_bar() to return error codes on failure

2021-02-23T20:10:40+00:00

Modify pci_epc_get_next_free_bar() and pci_epc_get_first_free_bar() to
return error values if there are no free BARs available.

Link: https://lore.kernel.org/r/20210201195809.7342-5-kishon@ti.com
Signed-off-by: Kishon Vijay Abraham I 
Signed-off-by: Lorenzo Pieralisi 
Signed-off-by: Bjorn Helgaas

PCI: endpoint: Add helper API to get the 'next' unreserved BAR

2021-02-23T20:10:34+00:00

Add an API to get the next unreserved BAR starting from a given BAR number
that can be used by the endpoint function.

Link: https://lore.kernel.org/r/20210201195809.7342-4-kishon@ti.com
Signed-off-by: Kishon Vijay Abraham I 
Signed-off-by: Lorenzo Pieralisi 
Signed-off-by: Bjorn Helgaas

PCI: endpoint: Add support to handle multiple base for mapping outbound memory

2020-05-22T11:35:07+00:00

R-Car PCIe controller has support to map multiple memory regions for
mapping the outbound memory in local system also the controller limits
single allocation for each region (that is, once a chunk is used from the
region it cannot be used to allocate a new one). This features inspires to
add support for handling multiple memory bases in endpoint framework.

With this patch pci_epc_mem_init() initializes address space for endpoint
controller which support single window and pci_epc_multi_mem_init()
initializes multiple windows supported by endpoint controller.

Link: https://lore.kernel.org/r/1588854799-13710-6-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Lad Prabhakar 
Signed-off-by: Lorenzo Pieralisi 
Reviewed-by: Yoshihiro Shimoda 
Acked-by: Kishon Vijay Abraham I

PCI: endpoint: Pass page size as argument to pci_epc_mem_init()

2020-05-11T10:29:48+00:00

pci_epc_mem_init() internally used page size equal to *PAGE_SIZE* to
manage the address space so instead just pass the page size as a
argument to pci_epc_mem_init().

Also make pci_epc_mem_init() as a C function instead of a macro function
in preparation for adding support for pci-epc-mem core to handle multiple
windows.

Link: https://lore.kernel.org/r/1588854799-13710-5-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Lad Prabhakar 
Signed-off-by: Lorenzo Pieralisi 
Reviewed-by: Yoshihiro Shimoda 
Acked-by: Kishon Vijay Abraham I

PCI: endpoint: Fix ->set_msix() to take BIR and offset as arguments

2020-04-02T16:57:10+00:00

commit 8963106eabdc ("PCI: endpoint: Add MSI-X interfaces") while
adding support to raise MSI-X interrupts from endpoint didn't include
BAR Indicator register (BIR) configuration and MSI-X table offset as
arguments in pci_epc_set_msix(). This would result in endpoint
controller register using random BAR indicator register, the memory
for which might not be allocated by the endpoint function driver.
Add BAR indicator register and MSI-X table offset as arguments in
pci_epc_set_msix() and allocate space for MSI-X table and pending
bit array (PBA) in pci-epf-test endpoint function driver.

Fixes: 8963106eabdc ("PCI: endpoint: Add MSI-X interfaces")
Signed-off-by: Kishon Vijay Abraham I 
Signed-off-by: Lorenzo Pieralisi

PCI: endpoint: Add notification for core init completion

2020-02-25T12:02:25+00:00

Add support to send notifications to EPF from EPC once the core
registers initialization is complete.

Signed-off-by: Vidya Sagar 
Signed-off-by: Lorenzo Pieralisi 
Acked-by: Kishon Vijay Abraham I