[dpdk-dev] [PATCH v5] app/testpmd: add IFPGA AFU register access function

[Rosen Xu <rosen.xu@intel.com>]

Currently register read/write of testpmd is only for PCI device,
but more and more IFPGA based AFU devices need this feature to
access registers, this patch will add support for it.

Signed-off-by: Rosen Xu <rosen.xu@intel.com>
---
 app/test-pmd/config.c  | 116 ++++++++++++++++++++++++++++++++++++++++---------
 app/test-pmd/testpmd.h |  60 +++++++++++++++++++++++++
 2 files changed, 155 insertions(+), 21 deletions(-)

diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index b9e5dd9..f39a8eb 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -872,7 +872,8 @@ void print_valid_ports(void)
 {
 	const struct rte_pci_device *pci_dev;
 	const struct rte_bus *bus;
-	uint64_t pci_len;
+	uint64_t len;
+	const struct rte_afu_device *afu_dev;
 
 	if (reg_off & 0x3) {
 		printf("Port register offset 0x%X not aligned on a 4-byte "
@@ -889,16 +890,21 @@ void print_valid_ports(void)
 	bus = rte_bus_find_by_device(ports[port_id].dev_info.device);
 	if (bus && !strcmp(bus->name, "pci")) {
 		pci_dev = RTE_DEV_TO_PCI(ports[port_id].dev_info.device);
+		len = pci_dev->mem_resource[0].len;
+	} else if (bus && !strcmp(bus->name, "ifpga")) {
+		afu_dev = RTE_DEV_TO_AFU(ports[port_id].dev_info.device);
+		len = afu_dev->mem_resource[0].len;
 	} else {
-		printf("Not a PCI device\n");
+		printf("Not a PCI or AFU device\n");
 		return 1;
 	}
 
-	pci_len = pci_dev->mem_resource[0].len;
-	if (reg_off >= pci_len) {
-		printf("Port %d: register offset %u (0x%X) out of port PCI "
+	if (reg_off >= len) {
+		printf("Port %d: register offset %u (0x%X) out of port "
+		       "PCI or AFU device "
 		       "resource (length=%"PRIu64")\n",
-		       port_id, (unsigned)reg_off, (unsigned)reg_off,  pci_len);
+		       port_id, (unsigned int)reg_off,
+			(unsigned int)reg_off, len);
 		return 1;
 	}
 	return 0;
@@ -927,7 +933,7 @@ void print_valid_ports(void)
 port_reg_bit_display(portid_t port_id, uint32_t reg_off, uint8_t bit_x)
 {
 	uint32_t reg_v;
-
+	const struct rte_bus *bus;
 
 	if (port_id_is_invalid(port_id, ENABLED_WARN))
 		return;
@@ -935,7 +941,16 @@ void print_valid_ports(void)
 		return;
 	if (reg_bit_pos_is_invalid(bit_x))
 		return;
-	reg_v = port_id_pci_reg_read(port_id, reg_off);
+
+	bus = rte_bus_find_by_device(ports[port_id].dev_info.device);
+	if (bus && !strcmp(bus->name, "pci")) {
+		reg_v = port_id_pci_reg_read(port_id, reg_off);
+	} else if (bus && !strcmp(bus->name, "ifpga")) {
+		reg_v = port_id_afu_reg_read(port_id, reg_off);
+	} else {
+		printf("Not a PCI or AFU device\n");
+		return;
+	}
 	display_port_and_reg_off(port_id, (unsigned)reg_off);
 	printf("bit %d=%d\n", bit_x, (int) ((reg_v & (1 << bit_x)) >> bit_x));
 }
@@ -947,6 +962,7 @@ void print_valid_ports(void)
 	uint32_t reg_v;
 	uint8_t  l_bit;
 	uint8_t  h_bit;
+	const struct rte_bus *bus;
 
 	if (port_id_is_invalid(port_id, ENABLED_WARN))
 		return;
@@ -961,7 +977,15 @@ void print_valid_ports(void)
 	else
 		l_bit = bit1_pos, h_bit = bit2_pos;
 
-	reg_v = port_id_pci_reg_read(port_id, reg_off);
+	bus = rte_bus_find_by_device(ports[port_id].dev_info.device);
+	if (bus && !strcmp(bus->name, "pci")) {
+		reg_v = port_id_pci_reg_read(port_id, reg_off);
+	} else if (bus && !strcmp(bus->name, "ifpga")) {
+		reg_v = port_id_afu_reg_read(port_id, reg_off);
+	} else {
+		printf("Not a PCI or AFU device\n");
+		return;
+	}
 	reg_v >>= l_bit;
 	if (h_bit < 31)
 		reg_v &= ((1 << (h_bit - l_bit + 1)) - 1);
@@ -974,12 +998,22 @@ void print_valid_ports(void)
 port_reg_display(portid_t port_id, uint32_t reg_off)
 {
 	uint32_t reg_v;
+	const struct rte_bus *bus;
 
 	if (port_id_is_invalid(port_id, ENABLED_WARN))
 		return;
 	if (port_reg_off_is_invalid(port_id, reg_off))
 		return;
-	reg_v = port_id_pci_reg_read(port_id, reg_off);
+
+	bus = rte_bus_find_by_device(ports[port_id].dev_info.device);
+	if (bus && !strcmp(bus->name, "pci")) {
+		reg_v = port_id_pci_reg_read(port_id, reg_off);
+	} else if (bus && !strcmp(bus->name, "ifpga")) {
+		reg_v = port_id_afu_reg_read(port_id, reg_off);
+	} else {
+		printf("Not a PCI or AFU device\n");
+		return;
+	}
 	display_port_reg_value(port_id, reg_off, reg_v);
 }
 
@@ -988,6 +1022,7 @@ void print_valid_ports(void)
 		 uint8_t bit_v)
 {
 	uint32_t reg_v;
+	const struct rte_bus *bus;
 
 	if (port_id_is_invalid(port_id, ENABLED_WARN))
 		return;
@@ -999,12 +1034,26 @@ void print_valid_ports(void)
 		printf("Invalid bit value %d (must be 0 or 1)\n", (int) bit_v);
 		return;
 	}
-	reg_v = port_id_pci_reg_read(port_id, reg_off);
-	if (bit_v == 0)
-		reg_v &= ~(1 << bit_pos);
-	else
-		reg_v |= (1 << bit_pos);
-	port_id_pci_reg_write(port_id, reg_off, reg_v);
+
+	bus = rte_bus_find_by_device(ports[port_id].dev_info.device);
+	if (bus && !strcmp(bus->name, "pci")) {
+		reg_v = port_id_pci_reg_read(port_id, reg_off);
+		if (bit_v == 0)
+			reg_v &= ~(1 << bit_pos);
+		else
+			reg_v |= (1 << bit_pos);
+		port_id_pci_reg_write(port_id, reg_off, reg_v);
+	} else if (bus && !strcmp(bus->name, "ifpga")) {
+		reg_v = port_id_afu_reg_read(port_id, reg_off);
+		if (bit_v == 0)
+			reg_v &= ~(1 << bit_pos);
+		else
+			reg_v |= (1 << bit_pos);
+		port_id_afu_reg_write(port_id, reg_off, reg_v);
+	} else {
+		printf("Not a PCI or AFU device\n");
+		return;
+	}
 	display_port_reg_value(port_id, reg_off, reg_v);
 }
 
@@ -1016,6 +1065,7 @@ void print_valid_ports(void)
 	uint32_t reg_v;
 	uint8_t  l_bit;
 	uint8_t  h_bit;
+	const struct rte_bus *bus;
 
 	if (port_id_is_invalid(port_id, ENABLED_WARN))
 		return;
@@ -1041,21 +1091,45 @@ void print_valid_ports(void)
 				(unsigned)max_v, (unsigned)max_v);
 		return;
 	}
-	reg_v = port_id_pci_reg_read(port_id, reg_off);
-	reg_v &= ~(max_v << l_bit); /* Keep unchanged bits */
-	reg_v |= (value << l_bit); /* Set changed bits */
-	port_id_pci_reg_write(port_id, reg_off, reg_v);
+
+	bus = rte_bus_find_by_device(ports[port_id].dev_info.device);
+	if (bus && !strcmp(bus->name, "pci")) {
+		reg_v = port_id_pci_reg_read(port_id, reg_off);
+		reg_v &= ~(max_v << l_bit); /* Keep unchanged bits */
+		reg_v |= (value << l_bit); /* Set changed bits */
+		port_id_pci_reg_write(port_id, reg_off, reg_v);
+	} else if (bus && !strcmp(bus->name, "ifpga")) {
+		reg_v = port_id_afu_reg_read(port_id, reg_off);
+		reg_v &= ~(max_v << l_bit); /* Keep unchanged bits */
+		reg_v |= (value << l_bit); /* Set changed bits */
+		port_id_afu_reg_write(port_id, reg_off, reg_v);
+	} else {
+		printf("Not a PCI or AFU device\n");
+		return;
+	}
 	display_port_reg_value(port_id, reg_off, reg_v);
 }
 
 void
 port_reg_set(portid_t port_id, uint32_t reg_off, uint32_t reg_v)
 {
+	const struct rte_bus *bus;
+
 	if (port_id_is_invalid(port_id, ENABLED_WARN))
 		return;
 	if (port_reg_off_is_invalid(port_id, reg_off))
 		return;
-	port_id_pci_reg_write(port_id, reg_off, reg_v);
+
+	bus = rte_bus_find_by_device(ports[port_id].dev_info.device);
+	if (bus && !strcmp(bus->name, "pci")) {
+		port_id_pci_reg_write(port_id, reg_off, reg_v);
+	} else if (bus && !strcmp(bus->name, "ifpga")) {
+		port_id_afu_reg_write(port_id, reg_off, reg_v);
+	} else {
+		printf("Not a PCI or AFU device\n");
+		return;
+	}
+
 	display_port_reg_value(port_id, reg_off, reg_v);
 }
 
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index 3ff11e6..0f51df4 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -11,6 +11,7 @@
 #include <rte_bus_pci.h>
 #include <rte_gro.h>
 #include <rte_gso.h>
+#include <rte_bus_ifpga.h>
 
 #define RTE_PORT_ALL            (~(portid_t)0x0)
 
@@ -671,6 +672,65 @@ struct mplsoudp_decap_conf {
 #define port_id_pci_reg_write(pt_id, reg_off, reg_value) \
 	port_pci_reg_write(&ports[(pt_id)], (reg_off), (reg_value))
 
+/**
+ * Read/Write operations on an AFU register of a port.
+ */
+static inline uint32_t
+port_afu_reg_read(struct rte_port *port, uint32_t reg_off)
+{
+	const struct rte_afu_device *afu_dev;
+	const struct rte_bus *bus;
+	void *reg_addr;
+	uint32_t reg_v;
+
+	if (!port->dev_info.device) {
+		printf("Invalid device\n");
+		return 0;
+	}
+
+	bus = rte_bus_find_by_device(port->dev_info.device);
+	if (bus && !strcmp(bus->name, "ifpga")) {
+		afu_dev = RTE_DEV_TO_AFU(port->dev_info.device);
+	} else {
+		printf("Not an IFPGA AFU device\n");
+		return 0;
+	}
+
+	reg_addr = ((char *)afu_dev->mem_resource[0].addr + reg_off);
+	reg_v = *((volatile uint32_t *)reg_addr);
+	return rte_le_to_cpu_32(reg_v);
+}
+
+#define port_id_afu_reg_read(pt_id, reg_off) \
+	port_afu_reg_read(&ports[(pt_id)], (reg_off))
+
+static inline void
+port_afu_reg_write(struct rte_port *port, uint32_t reg_off, uint32_t reg_v)
+{
+	const struct rte_afu_device *afu_dev;
+	const struct rte_bus *bus;
+	void *reg_addr;
+
+	if (!port->dev_info.device) {
+		printf("Invalid device\n");
+		return;
+	}
+
+	bus = rte_bus_find_by_device(port->dev_info.device);
+	if (bus && !strcmp(bus->name, "ifpga")) {
+		afu_dev = RTE_DEV_TO_AFU(port->dev_info.device);
+	} else {
+		printf("Not an IFPGA AFU device\n");
+		return;
+	}
+
+	reg_addr = ((char *)afu_dev->mem_resource[0].addr + reg_off);
+	*((volatile uint32_t *)reg_addr) = rte_cpu_to_le_32(reg_v);
+}
+
+#define port_id_afu_reg_write(pt_id, reg_off, reg_value) \
+	port_afu_reg_write(&ports[(pt_id)], (reg_off), (reg_value))
+
 /* Prototypes */
 unsigned int parse_item_list(char* str, const char* item_name,
 			unsigned int max_items,
-- 
1.8.3.1