Add tests for SCMI reset controllers. A test device driver
sandbox-scmi_devices.c is used to get reset resources, allowing further
resets manipulation.
Change sandbox-smci_agent to emulate 1 reset controller exposed through
an agent. Add DM test scmi_resets to test this reset controller.
Signed-off-by: Etienne Carriere <etienne.carri...@linaro.org>
Cc: Simon Glass <s...@chromium.org>
Cc: Peng Fan <peng....@nxp.com>
Cc: Sudeep Holla <sudeep.ho...@arm.com>
---
Changes in v4:
- Rebase in the series without major conflict.
- Rename test/dm/scmi.c local variables rc to ret for consistency.
Changes in v3:
- New commit in the series, addresses review comments on test support.
ut_dm_scmi_resets() tests SCMI resources are found and behave as
expected for the implemented reset uclass methods.
---
arch/sandbox/dts/test.dts | 6 +
arch/sandbox/include/asm/scmi_test.h | 17 +++
configs/sandbox_defconfig | 1 +
drivers/firmware/scmi/sandbox-scmi_agent.c | 117 ++++++++++++++++++-
drivers/firmware/scmi/sandbox-scmi_devices.c | 40 ++++++-
test/dm/scmi.c | 36 ++++++
6 files changed, 211 insertions(+), 6 deletions(-)
diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index 61acd8d79f..7023f33a67 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -366,6 +366,11 @@
reg = <0x14>;
#clock-cells = <1>;
};
+
+ reset_scmi0: protocol@16 {
+ reg = <0x16>;
+ #reset-cells = <1>;
+ };
};
sandbox-scmi-agent@1 {
@@ -1065,6 +1070,7 @@
sandbox_scmi {
compatible = "sandbox,scmi-devices";
clocks = <&clk_scmi0 7>, <&clk_scmi0 3>, <&clk_scmi1 1>;
+ resets = <&reset_scmi0 3>;
};
pinctrl {
diff --git a/arch/sandbox/include/asm/scmi_test.h
b/arch/sandbox/include/asm/scmi_test.h
index 63093fdb4d..3e8b0068fd 100644
--- a/arch/sandbox/include/asm/scmi_test.h
+++ b/arch/sandbox/include/asm/scmi_test.h
@@ -22,16 +22,29 @@ struct sandbox_scmi_clk {
ulong rate;
};
+/**
+ * struct sandbox_scmi_reset - Simulated reset controller exposed by SCMI
+ * @asserted: Reset control state: true if asserted, false if desasserted
+ */
+struct sandbox_scmi_reset {
+ uint id;
+ bool asserted;
+};
+
/**
* struct sandbox_scmi_agent - Simulated SCMI service seen by SCMI agent
* @idx: Identifier for the SCMI agent, its index
* @clk: Simulated clocks
* @clk_count: Simulated clocks array size
+ * @clk: Simulated reset domains
+ * @clk_count: Simulated reset domains array size
*/
struct sandbox_scmi_agent {
uint idx;
struct sandbox_scmi_clk *clk;
size_t clk_count;
+ struct sandbox_scmi_reset *reset;
+ size_t reset_count;
};
/**
@@ -48,10 +61,14 @@ struct sandbox_scmi_service {
* struct sandbox_scmi_devices - Reference to devices probed through SCMI
* @clk: Array the clock devices
* @clk_count: Number of clock devices probed
+ * @reset: Array the reset controller devices
+ * @reset_count: Number of reset controller devices probed
*/
struct sandbox_scmi_devices {
struct clk *clk;
size_t clk_count;
+ struct reset_ctl *reset;
+ size_t reset_count;
};
#ifdef CONFIG_SCMI_FIRMWARE
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 7d71c805dc..a2ebb3c971 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -220,6 +220,7 @@ CONFIG_REMOTEPROC_SANDBOX=y
CONFIG_DM_RESET=y
CONFIG_SANDBOX_RESET=y
CONFIG_RESET_SYSCON=y
+CONFIG_RESET_SCMI=y
CONFIG_DM_RNG=y
CONFIG_DM_RTC=y
CONFIG_RTC_RV8803=y
diff --git a/drivers/firmware/scmi/sandbox-scmi_agent.c
b/drivers/firmware/scmi/sandbox-scmi_agent.c
index ff590988a6..5b6a4232af 100644
--- a/drivers/firmware/scmi/sandbox-scmi_agent.c
+++ b/drivers/firmware/scmi/sandbox-scmi_agent.c
@@ -18,19 +18,20 @@
* processing. It simulates few of the SCMI services for some of the
* SCMI protocols embedded in U-Boot. Currently:
* - SCMI clock protocol: emulate 2 agents each exposing few clocks
+ * - SCMI reset protocol: emulate 1 agents each exposing a reset
*
- * Agent #0 simulates 2 clocks.
- * See IDs in scmi0_clk[] and "sandbox-scmi-agent@0" in test.dts.
+ * Agent #0 simulates 2 clocks and 1 reset domain.
+ * See IDs in scmi0_clk[]/scmi0_reset[] and "sandbox-scmi-agent@0" in test.dts.
*
* Agent #1 simulates 1 clock.
* See IDs in scmi1_clk[] and "sandbox-scmi-agent@1" in test.dts.
*
- * All clocks are default disabled.
+ * All clocks are default disabled and reset levels down.
*
* This Driver exports sandbox_scmi_service_ct() for the test sequence to
* get the state of the simulated services (clock state, rate, ...) and
* check back-end device state reflects the request send through the
- * various uclass devices, currently only clock controllers.
+ * various uclass devices, as clocks and reset controllers.
*/
#define SANDBOX_SCMI_AGENT_COUNT 2
@@ -40,6 +41,10 @@ static struct sandbox_scmi_clk scmi0_clk[] = {
{ .id = 3, .rate = 333 },
};
+static struct sandbox_scmi_reset scmi0_reset[] = {
+ { .id = 3 },
+};
+
static struct sandbox_scmi_clk scmi1_clk[] = {
{ .id = 1, .rate = 44 },
};
@@ -71,6 +76,11 @@ static void debug_print_agent_state(struct udevice *dev,
char *str)
agent->clk_count > 1 ? agent->clk[1].rate : -1,
agent->clk_count > 2 ? agent->clk[2].enabled : -1,
agent->clk_count > 2 ? agent->clk[2].rate : -1);
+ dev_dbg(dev, " scmi%u_reset (%zu): %d, %d, ...\n",
+ agent->idx,
+ agent->reset_count,
+ agent->reset_count ? agent->reset[0].asserted : -1,
+ agent->reset_count > 1 ? agent->reset[1].asserted : -1);
};
static struct sandbox_scmi_clk *get_scmi_clk_state(uint agent_id, uint
clock_id)
@@ -99,6 +109,20 @@ static struct sandbox_scmi_clk *get_scmi_clk_state(uint
agent_id, uint clock_id)
return NULL;
}
+static struct sandbox_scmi_reset *get_scmi_reset_state(uint agent_id,
+ uint reset_id)
+{
+ size_t n;
+
+ if (agent_id == 0) {
+ for (n = 0; n < ARRAY_SIZE(scmi0_reset); n++)
+ if (scmi0_reset[n].id == reset_id)
+ return scmi0_reset + n;
+ }
+
+ return NULL;
+}
+
/*
* Sandbox SCMI agent ops
*/
@@ -194,6 +218,78 @@ static int sandbox_scmi_clock_gate(struct udevice *dev,
struct scmi_msg *msg)
return 0;
}
+static int sandbox_scmi_rd_attribs(struct udevice *dev, struct scmi_msg *msg)
+{
+ struct sandbox_scmi_agent *agent = dev_get_priv(dev);
+ struct scmi_rd_attr_in *in = NULL;
+ struct scmi_rd_attr_out *out = NULL;
+ struct sandbox_scmi_reset *reset_state = NULL;
+
+ if (!msg->in_msg || msg->in_msg_sz < sizeof(*in) ||
+ !msg->out_msg || msg->out_msg_sz < sizeof(*out))
+ return -EINVAL;
+
+ in = (struct scmi_rd_attr_in *)msg->in_msg;
+ out = (struct scmi_rd_attr_out *)msg->out_msg;
+
+ reset_state = get_scmi_reset_state(agent->idx, in->domain_id);
+ if (!reset_state) {
+ dev_err(dev, "Unexpected reset domain ID %u\n", in->domain_id);
+
+ out->status = SCMI_NOT_FOUND;
+ } else {
+ memset(out, 0, sizeof(*out));
+ snprintf(out->name, sizeof(out->name), "rd%u", in->domain_id);
+
+ out->status = SCMI_SUCCESS;
+ }
+
+ return 0;
+}
+
+static int sandbox_scmi_rd_reset(struct udevice *dev, struct scmi_msg *msg)
+{
+ struct sandbox_scmi_agent *agent = dev_get_priv(dev);
+ struct scmi_rd_reset_in *in = NULL;
+ struct scmi_rd_reset_out *out = NULL;
+ struct sandbox_scmi_reset *reset_state = NULL;
+
+ if (!msg->in_msg || msg->in_msg_sz < sizeof(*in) ||
+ !msg->out_msg || msg->out_msg_sz < sizeof(*out))
+ return -EINVAL;
+
+ in = (struct scmi_rd_reset_in *)msg->in_msg;
+ out = (struct scmi_rd_reset_out *)msg->out_msg;
+
+ reset_state = get_scmi_reset_state(agent->idx, in->domain_id);
+ if (!reset_state) {
+ dev_err(dev, "Unexpected reset domain ID %u\n", in->domain_id);
+
+ out->status = SCMI_NOT_FOUND;
+ } else if (in->reset_state > 1) {
+ dev_err(dev, "Invalid reset domain input attribute value\n");
+
+ out->status = SCMI_INVALID_PARAMETERS;
+ } else {
+ if (in->flags & SCMI_RD_RESET_FLAG_CYCLE) {
+ if (in->flags & SCMI_RD_RESET_FLAG_ASYNC) {
+ out->status = SCMI_NOT_SUPPORTED;
+ } else {
+ /* Ends deasserted whatever current state */
+ reset_state->asserted = false;
+ out->status = SCMI_SUCCESS;
+ }
+ } else {
+ reset_state->asserted = in->flags &
+ SCMI_RD_RESET_FLAG_ASSERT;
+
+ out->status = SCMI_SUCCESS;
+ }
+ }
+
+ return 0;
+}
+
static int sandbox_scmi_test_process_msg(struct udevice *dev,
struct scmi_msg *msg)
{
@@ -210,12 +306,21 @@ static int sandbox_scmi_test_process_msg(struct udevice
*dev,
break;
}
break;
+ case SCMI_PROTOCOL_ID_RESET_DOMAIN:
+ switch (msg->message_id) {
+ case SCMI_RESET_DOMAIN_ATTRIBUTES:
+ return sandbox_scmi_rd_attribs(dev, msg);
+ case SCMI_RESET_DOMAIN_RESET:
+ return sandbox_scmi_rd_reset(dev, msg);
+ default:
+ break;
+ }
+ break;
case SCMI_PROTOCOL_ID_BASE:
case SCMI_PROTOCOL_ID_POWER_DOMAIN:
case SCMI_PROTOCOL_ID_SYSTEM:
case SCMI_PROTOCOL_ID_PERF:
case SCMI_PROTOCOL_ID_SENSOR:
- case SCMI_PROTOCOL_ID_RESET_DOMAIN:
*(u32 *)msg->out_msg = SCMI_NOT_SUPPORTED;
return 0;
default:
@@ -260,6 +365,8 @@ static int sandbox_scmi_test_probe(struct udevice *dev)
.idx = 0,
.clk = scmi0_clk,
.clk_count = ARRAY_SIZE(scmi0_clk),
+ .reset = scmi0_reset,
+ .reset_count = ARRAY_SIZE(scmi0_reset),
};
break;
case '1':
diff --git a/drivers/firmware/scmi/sandbox-scmi_devices.c
b/drivers/firmware/scmi/sandbox-scmi_devices.c
index b3e411c5ac..c69967bf69 100644
--- a/drivers/firmware/scmi/sandbox-scmi_devices.c
+++ b/drivers/firmware/scmi/sandbox-scmi_devices.c
@@ -7,6 +7,7 @@
#include <clk.h>
#include <dm.h>
#include <malloc.h>
+#include <reset.h>
#include <asm/io.h>
#include <asm/scmi_test.h>
#include <dm/device_compat.h>
@@ -14,18 +15,22 @@
/*
* Simulate to some extent a SCMI exchange.
* This drivers gets SCMI resources and offers API function to the
- * SCMI test sequence manipulate the resources, currently clocks.
+ * SCMI test sequence manipulate the resources, currently clock
+ * and reset controllers.
*/
#define SCMI_TEST_DEVICES_CLK_COUNT 3
+#define SCMI_TEST_DEVICES_RD_COUNT 1
/*
* struct sandbox_scmi_device_priv - Storage for device handles used by test
* @clk: Array of clock instances used by tests
+ * @reset_clt: Array of the reset controller instances used by tests
* @devices: Resources exposed by sandbox_scmi_devices_ctx()
*/
struct sandbox_scmi_device_priv {
struct clk clk[SCMI_TEST_DEVICES_CLK_COUNT];
+ struct reset_ctl reset_ctl[SCMI_TEST_DEVICES_RD_COUNT];
struct sandbox_scmi_devices devices;
};
@@ -39,6 +44,22 @@ struct sandbox_scmi_devices *sandbox_scmi_devices_ctx(struct
udevice *dev)
return NULL;
}
+static int sandbox_scmi_devices_remove(struct udevice *dev)
+{
+ struct sandbox_scmi_devices *devices = sandbox_scmi_devices_ctx(dev);
+ int ret = 0;
+ size_t n;
+
+ for (n = 0; n < SCMI_TEST_DEVICES_RD_COUNT; n++) {
+ int ret2 = reset_free(devices->reset + n);
+
+ if (ret2 && !ret)
+ ret = ret2;
+ }
+
+ return ret;
+}
+
static int sandbox_scmi_devices_probe(struct udevice *dev)
{
struct sandbox_scmi_device_priv *priv = dev_get_priv(dev);
@@ -48,6 +69,8 @@ static int sandbox_scmi_devices_probe(struct udevice *dev)
priv->devices = (struct sandbox_scmi_devices){
.clk = priv->clk,
.clk_count = SCMI_TEST_DEVICES_CLK_COUNT,
+ .reset = priv->reset_ctl,
+ .reset_count = SCMI_TEST_DEVICES_RD_COUNT,
};
for (n = 0; n < SCMI_TEST_DEVICES_CLK_COUNT; n++) {
@@ -58,7 +81,21 @@ static int sandbox_scmi_devices_probe(struct udevice *dev)
}
}
+ for (n = 0; n < SCMI_TEST_DEVICES_RD_COUNT; n++) {
+ ret = reset_get_by_index(dev, n, priv->devices.reset + n);
+ if (ret) {
+ dev_err(dev, "%s: Failed on reset %zu\n", __func__, n);
+ goto err_reset;
+ }
+ }
+
return 0;
+
+err_reset:
+ for (; n > 0; n--)
+ reset_free(priv->devices.reset + n - 1);
+
+ return ret;
}
static const struct udevice_id sandbox_scmi_devices_ids[] = {
@@ -71,5 +108,6 @@ U_BOOT_DRIVER(sandbox_scmi_devices) = {
.id = UCLASS_MISC,
.of_match = sandbox_scmi_devices_ids,
.priv_auto_alloc_size = sizeof(struct sandbox_scmi_device_priv),
+ .remove = sandbox_scmi_devices_remove,
.probe = sandbox_scmi_devices_probe,
};
diff --git a/test/dm/scmi.c b/test/dm/scmi.c
index aa46f31a47..be60b44b3b 100644
--- a/test/dm/scmi.c
+++ b/test/dm/scmi.c
@@ -15,6 +15,7 @@
#include <common.h>
#include <clk.h>
#include <dm.h>
+#include <reset.h>
#include <asm/scmi_test.h>
#include <dm/device-internal.h>
#include <dm/test.h>
@@ -44,6 +45,8 @@ static int ut_assert_scmi_state_postprobe(struct
unit_test_state *uts,
ut_assertnonnull(scmi_devices);
if (IS_ENABLED(CONFIG_CLK_SCMI))
ut_asserteq(3, scmi_devices->clk_count);
+ if (IS_ENABLED(CONFIG_RESET_SCMI))
+ ut_asserteq(1, scmi_devices->reset_count);
/* State of the simulated SCMI server exposed */
scmi_ctx = sandbox_scmi_service_ctx();
@@ -53,6 +56,8 @@ static int ut_assert_scmi_state_postprobe(struct
unit_test_state *uts,
ut_assertnonnull(scmi_ctx->agent[0]);
ut_asserteq(2, scmi_ctx->agent[0]->clk_count);
ut_assertnonnull(scmi_ctx->agent[0]->clk);
+ ut_asserteq(1, scmi_ctx->agent[0]->reset_count);
+ ut_assertnonnull(scmi_ctx->agent[0]->reset);
ut_assertnonnull(scmi_ctx->agent[1]);
ut_assertnonnull(scmi_ctx->agent[1]->clk);
@@ -165,3 +170,34 @@ static int dm_test_scmi_clocks(struct unit_test_state *uts)
}
DM_TEST(dm_test_scmi_clocks, UT_TESTF_SCAN_FDT);
+
+static int dm_test_scmi_resets(struct unit_test_state *uts)
+{
+ struct sandbox_scmi_devices *scmi_devices;
+ struct sandbox_scmi_service *scmi_ctx;
+ struct udevice *dev = NULL;
+ int ret;
+
+ if (!IS_ENABLED(CONFIG_RESET_SCMI))
+ return 0;
+
+ ret = load_sandbox_scmi_test_devices(uts, &dev);
+ if (ret)
+ return ret;
+
+ scmi_devices = sandbox_scmi_devices_ctx(dev);
+ scmi_ctx = sandbox_scmi_service_ctx();
+
+ /* Test SCMI resect controller manipulation */
+ ut_assert(!scmi_ctx->agent[0]->reset[0].asserted)
+
+ ut_assertok(reset_assert(&scmi_devices->reset[0]));
+ ut_assert(scmi_ctx->agent[0]->reset[0].asserted)
+
+ ut_assertok(reset_deassert(&scmi_devices->reset[0]));
+ ut_assert(!scmi_ctx->agent[0]->reset[0].asserted);
+
+ return release_sandbox_scmi_test_devices(uts, dev);
+}
+
+DM_TEST(dm_test_scmi_resets, UT_TESTF_SCAN_FDT);
--
2.17.1
