cxgbe(4): Initial import of the "collect" component of Chelsio unified

debug (cudbg) code, hooked up to the main driver via an ioctl.

The ioctl can be used to collect the chip's internal state in a
compressed dump file.  These dumps can be decoded with the "view"
component of cudbg.

Obtained from:	Chelsio Communications
MFC after:	2 months
Sponsored by:	Chelsio Communications

sys/conf/files

@@ -1352,6 +1352,18 @@ dev/cxgbe/common/t4_hw.c	optional cxgbe pci \
 	compile-with "${NORMAL_C} -I$S/dev/cxgbe"
 dev/cxgbe/common/t4vf_hw.c	optional cxgbev pci \
 	compile-with "${NORMAL_C} -I$S/dev/cxgbe"
+dev/cxgbe/cudbg/cudbg_common.c	optional cxgbe \
+	compile-with "${NORMAL_C} -I$S/dev/cxgbe"
+dev/cxgbe/cudbg/cudbg_flash_utils.c	optional cxgbe \
+	compile-with "${NORMAL_C} -I$S/dev/cxgbe"
+dev/cxgbe/cudbg/cudbg_lib.c	optional cxgbe \
+	compile-with "${NORMAL_C} -I$S/dev/cxgbe"
+dev/cxgbe/cudbg/cudbg_wtp.c	optional cxgbe \
+	compile-with "${NORMAL_C} -I$S/dev/cxgbe"
+dev/cxgbe/cudbg/fastlz.c	optional cxgbe \
+	compile-with "${NORMAL_C} -I$S/dev/cxgbe"
+dev/cxgbe/cudbg/fastlz_api.c	optional cxgbe \
+	compile-with "${NORMAL_C} -I$S/dev/cxgbe"
 t4fw_cfg.c		optional cxgbe					\
 	compile-with	"${AWK} -f $S/tools/fw_stub.awk t4fw_cfg.fw:t4fw_cfg t4fw_cfg_uwire.fw:t4fw_cfg_uwire t4fw.fw:t4fw -mt4fw_cfg -c${.TARGET}" \
 	no-implicit-rule before-depend local				\

sys/dev/cxgbe/common/t4_hw.h

@@ -276,8 +276,17 @@ enum {
 	FLASH_MIN_SIZE = FLASH_CFG_START + FLASH_CFG_MAX_SIZE,
 
 	/*
-	 * Sectors 32-63 are reserved for FLASH failover.
+	 * Sectors 32-63 for CUDBG.
 	 */
+	FLASH_CUDBG_START_SEC = 32,
+	FLASH_CUDBG_NSECS = 32,
+	FLASH_CUDBG_START = FLASH_START(FLASH_CUDBG_START_SEC),
+	FLASH_CUDBG_MAX_SIZE = FLASH_MAX_SIZE(FLASH_CUDBG_NSECS),
+
+	/*
+	 * Size of defined FLASH regions.
+	 */
+	FLASH_END_SEC = 64,
 };
 
 #undef FLASH_START