Re: [PATCH v2 6/7] misc: bcm-vk: add Broadcom VK driver

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Hi Randy,

On 2020-02-19 5:04 p.m., Randy Dunlap wrote:
Hi,

On 2/19/20 4:48 PM, Scott Branden wrote:
diff --git a/drivers/misc/bcm-vk/Kconfig b/drivers/misc/bcm-vk/Kconfig
new file mode 100644
index 000000000000..c75dfb89a38d
--- /dev/null
+++ b/drivers/misc/bcm-vk/Kconfig
@@ -0,0 +1,42 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Broadcom VK device
+#
+config BCM_VK
+	tristate "Support for Broadcom VK Accelerators"
+	depends on PCI_MSI
+	default m
Need to justify default m. Normally we don't add drivers as enabled unless
they are required for basic (boot) operation.
Will remove default m as not needed to boot.  Interesting other offload engines misc/ocxl/Kconfig and misc/cxl/Kconfig have default m.

+	help
+	  Select this option to enable support for Broadcom
+	  VK Accelerators.  VK is used for performing
+	  specific video offload processing.  This driver enables
+	  userspace programs to access these accelerators via /dev/bcm-vk.N
+	  devices.
+
+	  If unsure, say N.
+
+if BCM_VK
+
+config BCM_VK_H2VK_VERIFY_AND_RETRY
+	bool "Host To VK Verifiy Data and Retry"
	                 Verify

+	help
+	  Turn on to verify the data passed down to VK is good,
+	  and if not, do a retry until it succeeds.
No timeout on that retry?
This is only enabled for debug purposes or fpga workarounds - no need for a timeout.

+	  This is a debug/workaround on FPGA PCIe timing issues
+	  but may be found useful for debugging other PCIe hardware issues.
+	  Small performance loss by enabling this debug config.
+	  For properly operating PCIe hardware no need to enable this.
+
+	  If unsure, say N.
+
+config BCM_VK_QSTATS
+	bool "VK Queue Statistics"
+	help
+	  Turn on to enable Queue Statistics.
+	  These are useful for debugging purposes.
+	  Some performance loss by enabling this debug config.
+	  For properly operating PCIe hardware no need to enable this.
+
+	  If unsure, say N.
+
+endif
cheers.




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