platforms: Add OpenCAPI platform data and device tree nodes

Add OpenCAPI platform data for the zaius and zz platforms, as well as the
generic platform that's used for BML boots. Currently, all three platforms
are identical, but that won't always be the case (e.g. Witherspoon).

Additionally, for Zaius, hardcode link information and the I2C bus that's
required to reset OpenCAPI devices, because this currently can't be
extracted from HDAT. Eventually this will go away once Hostboot adds the
relevant data in HDAT. A later patch will add this for ZZ once we've done
more testing.

Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

core/platform.c

@@ -168,6 +168,16 @@ static int generic_start_preload_resource(enum resource_id id, uint32_t subid,
 	return OPAL_EMPTY;
 }
 
+/* These values will work for a ZZ booted using BML */
+const struct platform_ocapi generic_ocapi = {
+	.i2c_engine	= 1,
+	.i2c_port	= 4,
+	.i2c_offset	= { 0x3, 0x1, 0x1 },
+	.i2c_odl0_data	= { 0xFD, 0xFD, 0xFF },
+	.i2c_odl1_data	= { 0xBF, 0xBF, 0xFF },
+	.odl_phy_swap	= true,
+};
+
 static struct bmc_platform generic_bmc = {
 	.name = "generic",
 };
@@ -183,6 +193,7 @@ static struct platform generic_platform = {
 	.cec_power_down	= generic_cec_power_down,
 	.start_preload_resource	= generic_start_preload_resource,
 	.resource_loaded	= generic_resource_loaded,
+	.ocapi		= &generic_ocapi,
 };
 
 const struct bmc_platform *bmc_platform = &generic_bmc;

platforms/astbmc/zaius.c

@@ -24,6 +24,99 @@
 
 #include "astbmc.h"
 
+const struct platform_ocapi zaius_ocapi = {
+	.i2c_engine	= 1,
+	.i2c_port	= 4,
+	.i2c_offset	= { 0x3, 0x1, 0x1 },
+	.i2c_odl0_data	= { 0xFD, 0xFD, 0xFF },
+	.i2c_odl1_data	= { 0xBF, 0xBF, 0xFF },
+	.odl_phy_swap	= true,
+};
+
+#define NPU_BASE 0x5011000
+#define NPU_SIZE 0x2c
+#define NPU_INDIRECT0	0x8000000009010c3f /* OB0 - no OB3 on Zaius */
+
+/* OpenCAPI only */
+static void create_link(struct dt_node *npu, int group, int index)
+{
+	struct dt_node *link;
+	uint32_t lane_mask;
+	char namebuf[32];
+
+	snprintf(namebuf, sizeof(namebuf), "link@%x", index);
+	link = dt_new(npu, namebuf);
+
+	dt_add_property_string(link, "compatible", "ibm,npu-link-opencapi");
+	dt_add_property_cells(link, "ibm,npu-link-index", index);
+
+	switch (index) {
+	case 2:
+		lane_mask = 0xf1e000; /* 0-3, 7-10 */
+		break;
+	case 3:
+		lane_mask = 0x00078f; /* 13-16, 20-23 */
+		break;
+	default:
+		assert(0);
+	}
+
+	dt_add_property_u64s(link, "ibm,npu-phy", NPU_INDIRECT0);
+	dt_add_property_cells(link, "ibm,npu-lane-mask", lane_mask);
+	dt_add_property_cells(link, "ibm,npu-group-id", group);
+	dt_add_property_u64s(link, "ibm,link-speed", 25000000000ul);
+}
+
+/* FIXME: Get rid of this after we get NPU information properly via HDAT/MRW */
+static void zaius_create_npu(void)
+{
+	struct dt_node *xscom, *npu;
+	int npu_index = 0;
+	int phb_index = 7;
+	char namebuf[32];
+
+	/* Abort if there's already an NPU in the device tree */
+	if (dt_find_compatible_node(dt_root, NULL, "ibm,power9-npu"))
+		return;
+
+	prlog(PR_DEBUG, "OCAPI: Adding NPU device nodes\n");
+	dt_for_each_compatible(dt_root, xscom, "ibm,xscom") {
+		snprintf(namebuf, sizeof(namebuf), "npu@%x", NPU_BASE);
+		npu = dt_new(xscom, namebuf);
+		dt_add_property_cells(npu, "reg", NPU_BASE, NPU_SIZE);
+		dt_add_property_strings(npu, "compatible", "ibm,power9-npu");
+		dt_add_property_cells(npu, "ibm,npu-index", npu_index++);
+		dt_add_property_cells(npu, "ibm,phb-index", phb_index++);
+		dt_add_property_cells(npu, "ibm,npu-links", 2);
+		create_link(npu, 1, 2);
+		create_link(npu, 2, 3);
+	}
+}
+
+/* FIXME: Get rid of this after we get NPU information properly via HDAT/MRW */
+static void zaius_create_ocapi_i2c_bus(void)
+{
+	struct dt_node *xscom, *i2cm, *i2c_bus;
+	prlog(PR_DEBUG, "OCAPI: Adding I2C bus device node for OCAPI reset\n");
+	dt_for_each_compatible(dt_root, xscom, "ibm,xscom") {
+		i2cm = dt_find_by_name(xscom, "i2cm@a1000");
+		if (!i2cm) {
+			prlog(PR_ERR, "OCAPI: Failed to add I2C bus device node\n");
+			continue;
+		}
+
+		if (dt_find_by_name(i2cm, "i2c-bus@4"))
+			continue;
+
+		i2c_bus = dt_new_addr(i2cm, "i2c-bus", 4);
+		dt_add_property_cells(i2c_bus, "reg", 4);
+		dt_add_property_cells(i2c_bus, "bus-frequency", 0x61a80);
+		dt_add_property_strings(i2c_bus, "compatible",
+					"ibm,opal-i2c", "ibm,power8-i2c-port",
+					"ibm,power9-i2c-port");
+	}
+}
+
 static bool zaius_probe(void)
 {
 	if (!dt_node_is_compatible(dt_root, "ingrasys,zaius"))
@@ -35,6 +128,9 @@ static bool zaius_probe(void)
 	/* Setup UART for direct use by Linux */
 	uart_set_console_policy(UART_CONSOLE_OS);
 
+	zaius_create_npu();
+	zaius_create_ocapi_i2c_bus();
+
 	return true;
 }
 
@@ -52,4 +148,5 @@ DECLARE_PLATFORM(zaius) = {
 	.elog_commit		= ipmi_elog_commit,
 	.exit			= ipmi_wdt_final_reset,
 	.terminate		= ipmi_terminate,
+	.ocapi			= &zaius_ocapi,
 };

platforms/ibm-fsp/zz.c

@@ -27,6 +27,16 @@
 #include "ibm-fsp.h"
 #include "lxvpd.h"
 
+/* We don't yet create NPU device nodes on ZZ, but these values are correct */
+const struct platform_ocapi zz_ocapi = {
+	.i2c_engine	= 1,
+	.i2c_port	= 4,
+	.i2c_offset	= { 0x3, 0x1, 0x1 },
+	.i2c_odl0_data	= { 0xFD, 0xFD, 0xFF },
+	.i2c_odl1_data	= { 0xBF, 0xBF, 0xFF },
+	.odl_phy_swap	= true,
+};
+
 static bool zz_probe(void)
 {
 	/* FIXME: make this neater when the dust settles */
@@ -71,4 +81,5 @@ DECLARE_PLATFORM(zz) = {
 	.resource_loaded	= fsp_resource_loaded,
 	.sensor_read		= ibm_fsp_sensor_read,
 	.terminate		= ibm_fsp_terminate,
+	.ocapi			= &zz_ocapi,
 };