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authorGustavo Pimentel <gustavo.pimentel@synopsys.com>2018-07-19 11:32:19 +0300
committerLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2018-07-19 13:46:45 +0300
commitc2e00e31087e58f6c49b90b4702fc3df4fad6a83 (patch)
tree2a9aff91c46a4205744b4ea97ccc5b5b6bd35993 /Documentation/PCI
parent9133e394d5ed1c81c1141d611915e09e9f32330d (diff)
downloadlinux-c2e00e31087e58f6c49b90b4702fc3df4fad6a83.tar.xz
pci-epf-test/pci_endpoint_test: Add MSI-X support
Add MSI-X support and update driver documentation accordingly. Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Diffstat (limited to 'Documentation/PCI')
-rw-r--r--Documentation/PCI/endpoint/pci-endpoint.txt4
-rw-r--r--Documentation/PCI/endpoint/pci-test-function.txt4
-rw-r--r--Documentation/PCI/endpoint/pci-test-howto.txt22
3 files changed, 24 insertions, 6 deletions
diff --git a/Documentation/PCI/endpoint/pci-endpoint.txt b/Documentation/PCI/endpoint/pci-endpoint.txt
index 9b1d66829290..e86a96b66a6a 100644
--- a/Documentation/PCI/endpoint/pci-endpoint.txt
+++ b/Documentation/PCI/endpoint/pci-endpoint.txt
@@ -44,7 +44,7 @@ by the PCI controller driver.
* clear_bar: ops to reset the BAR
* alloc_addr_space: ops to allocate in PCI controller address space
* free_addr_space: ops to free the allocated address space
- * raise_irq: ops to raise a legacy or MSI interrupt
+ * raise_irq: ops to raise a legacy, MSI or MSI-X interrupt
* start: ops to start the PCI link
* stop: ops to stop the PCI link
@@ -96,7 +96,7 @@ by the PCI endpoint function driver.
*) pci_epc_raise_irq()
The PCI endpoint function driver should use pci_epc_raise_irq() to raise
- Legacy Interrupt or MSI Interrupt.
+ Legacy Interrupt, MSI or MSI-X Interrupt.
*) pci_epc_mem_alloc_addr()
diff --git a/Documentation/PCI/endpoint/pci-test-function.txt b/Documentation/PCI/endpoint/pci-test-function.txt
index bf4b5cf6fee6..5916f1f592bb 100644
--- a/Documentation/PCI/endpoint/pci-test-function.txt
+++ b/Documentation/PCI/endpoint/pci-test-function.txt
@@ -36,7 +36,7 @@ that the endpoint device must perform.
Bitfield Description:
Bit 0 : raise legacy IRQ
Bit 1 : raise MSI IRQ
- Bit 2 : raise MSI-X IRQ (reserved for future implementation)
+ Bit 2 : raise MSI-X IRQ
Bit 3 : read command (read data from RC buffer)
Bit 4 : write command (write data to RC buffer)
Bit 5 : copy command (copy data from one RC buffer to another
@@ -75,6 +75,7 @@ for the READ/WRITE/COPY and raise IRQ (Legacy/MSI) commands.
Possible types:
- Legacy : 0
- MSI : 1
+ - MSI-X : 2
*) PCI_ENDPOINT_TEST_IRQ_NUMBER
@@ -83,3 +84,4 @@ This register contains the triggered ID interrupt.
Admissible values:
- Legacy : 0
- MSI : [1 .. 32]
+ - MSI-X : [1 .. 2048]
diff --git a/Documentation/PCI/endpoint/pci-test-howto.txt b/Documentation/PCI/endpoint/pci-test-howto.txt
index 75f48c3bb191..65f1a137e35c 100644
--- a/Documentation/PCI/endpoint/pci-test-howto.txt
+++ b/Documentation/PCI/endpoint/pci-test-howto.txt
@@ -45,9 +45,9 @@ The PCI endpoint framework populates the directory with the following
configurable fields.
# ls functions/pci_epf_test/func1
- baseclass_code interrupt_pin revid subsys_vendor_id
- cache_line_size msi_interrupts subclass_code vendorid
- deviceid progif_code subsys_id
+ baseclass_code interrupt_pin progif_code subsys_id
+ cache_line_size msi_interrupts revid subsys_vendorid
+ deviceid msix_interrupts subclass_code vendorid
The PCI endpoint function driver populates these entries with default values
when the device is bound to the driver. The pci-epf-test driver populates
@@ -67,6 +67,7 @@ device, the following commands can be used.
# echo 0x104c > functions/pci_epf_test/func1/vendorid
# echo 0xb500 > functions/pci_epf_test/func1/deviceid
# echo 16 > functions/pci_epf_test/func1/msi_interrupts
+ # echo 8 > functions/pci_epf_test/func1/msix_interrupts
1.5 Binding pci-epf-test Device to EP Controller
@@ -153,6 +154,21 @@ following commands.
MSI30: NOT OKAY
MSI31: NOT OKAY
MSI32: NOT OKAY
+ MSIX1: OKAY
+ MSIX2: OKAY
+ MSIX3: OKAY
+ MSIX4: OKAY
+ MSIX5: OKAY
+ MSIX6: OKAY
+ MSIX7: OKAY
+ MSIX8: OKAY
+ MSIX9: NOT OKAY
+ MSIX10: NOT OKAY
+ MSIX11: NOT OKAY
+ MSIX12: NOT OKAY
+ MSIX13: NOT OKAY
+ [...]
+ MSIX2048: NOT OKAY
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