pci-epf-test/pci_endpoint_test: Add MSI-X support

Add MSI-X support and update driver documentation accordingly.

Signed-off-by: Gustavo Pimentel <[email protected]>
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Acked-by: Kishon Vijay Abraham I <[email protected]>

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()
 

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]

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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