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![Etienne Carriere](/assets/img/avatar_default.png)
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.carriere@linaro.org> Cc: Simon Glass <sjg@chromium.org> Cc: Peng Fan <peng.fan@nxp.com> Cc: Sudeep Holla <sudeep.holla@arm.com> Reviewed-by: Simon Glass <sjg@chromium.org>
411 lines
11 KiB
C
411 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2020, Linaro Limited
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*/
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#include <common.h>
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#include <dm.h>
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#include <malloc.h>
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#include <scmi_agent.h>
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#include <scmi_agent-uclass.h>
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#include <scmi_protocols.h>
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#include <asm/io.h>
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#include <asm/scmi_test.h>
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#include <dm/device_compat.h>
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/*
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* The sandbox SCMI agent driver simulates to some extend a SCMI message
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* processing. It simulates few of the SCMI services for some of the
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* SCMI protocols embedded in U-Boot. Currently:
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* - SCMI clock protocol: emulate 2 agents each exposing few clocks
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* - SCMI reset protocol: emulate 1 agents each exposing a reset
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*
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* Agent #0 simulates 2 clocks and 1 reset domain.
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* See IDs in scmi0_clk[]/scmi0_reset[] and "sandbox-scmi-agent@0" in test.dts.
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*
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* Agent #1 simulates 1 clock.
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* See IDs in scmi1_clk[] and "sandbox-scmi-agent@1" in test.dts.
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*
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* All clocks are default disabled and reset levels down.
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*
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* This Driver exports sandbox_scmi_service_ct() for the test sequence to
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* get the state of the simulated services (clock state, rate, ...) and
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* check back-end device state reflects the request send through the
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* various uclass devices, as clocks and reset controllers.
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*/
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#define SANDBOX_SCMI_AGENT_COUNT 2
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static struct sandbox_scmi_clk scmi0_clk[] = {
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{ .id = 7, .rate = 1000 },
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{ .id = 3, .rate = 333 },
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};
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static struct sandbox_scmi_reset scmi0_reset[] = {
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{ .id = 3 },
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};
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static struct sandbox_scmi_clk scmi1_clk[] = {
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{ .id = 1, .rate = 44 },
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};
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/* The list saves to simulted end devices references for test purpose */
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struct sandbox_scmi_agent *sandbox_scmi_agent_list[SANDBOX_SCMI_AGENT_COUNT];
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static struct sandbox_scmi_service sandbox_scmi_service_state = {
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.agent = sandbox_scmi_agent_list,
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.agent_count = SANDBOX_SCMI_AGENT_COUNT,
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};
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struct sandbox_scmi_service *sandbox_scmi_service_ctx(void)
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{
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return &sandbox_scmi_service_state;
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}
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static void debug_print_agent_state(struct udevice *dev, char *str)
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{
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struct sandbox_scmi_agent *agent = dev_get_priv(dev);
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dev_dbg(dev, "Dump sandbox_scmi_agent %u: %s\n", agent->idx, str);
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dev_dbg(dev, " scmi%u_clk (%zu): %d/%ld, %d/%ld, %d/%ld, ...\n",
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agent->idx,
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agent->clk_count,
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agent->clk_count ? agent->clk[0].enabled : -1,
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agent->clk_count ? agent->clk[0].rate : -1,
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agent->clk_count > 1 ? agent->clk[1].enabled : -1,
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agent->clk_count > 1 ? agent->clk[1].rate : -1,
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agent->clk_count > 2 ? agent->clk[2].enabled : -1,
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agent->clk_count > 2 ? agent->clk[2].rate : -1);
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dev_dbg(dev, " scmi%u_reset (%zu): %d, %d, ...\n",
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agent->idx,
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agent->reset_count,
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agent->reset_count ? agent->reset[0].asserted : -1,
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agent->reset_count > 1 ? agent->reset[1].asserted : -1);
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};
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static struct sandbox_scmi_clk *get_scmi_clk_state(uint agent_id, uint clock_id)
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{
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struct sandbox_scmi_clk *target = NULL;
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size_t target_count = 0;
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size_t n;
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switch (agent_id) {
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case 0:
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target = scmi0_clk;
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target_count = ARRAY_SIZE(scmi0_clk);
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break;
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case 1:
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target = scmi1_clk;
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target_count = ARRAY_SIZE(scmi1_clk);
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break;
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default:
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return NULL;
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}
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for (n = 0; n < target_count; n++)
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if (target[n].id == clock_id)
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return target + n;
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return NULL;
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}
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static struct sandbox_scmi_reset *get_scmi_reset_state(uint agent_id,
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uint reset_id)
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{
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size_t n;
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if (agent_id == 0) {
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for (n = 0; n < ARRAY_SIZE(scmi0_reset); n++)
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if (scmi0_reset[n].id == reset_id)
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return scmi0_reset + n;
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}
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return NULL;
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}
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/*
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* Sandbox SCMI agent ops
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*/
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static int sandbox_scmi_clock_rate_set(struct udevice *dev,
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struct scmi_msg *msg)
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{
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struct sandbox_scmi_agent *agent = dev_get_priv(dev);
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struct scmi_clk_rate_set_in *in = NULL;
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struct scmi_clk_rate_set_out *out = NULL;
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struct sandbox_scmi_clk *clk_state = NULL;
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if (!msg->in_msg || msg->in_msg_sz < sizeof(*in) ||
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!msg->out_msg || msg->out_msg_sz < sizeof(*out))
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return -EINVAL;
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in = (struct scmi_clk_rate_set_in *)msg->in_msg;
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out = (struct scmi_clk_rate_set_out *)msg->out_msg;
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clk_state = get_scmi_clk_state(agent->idx, in->clock_id);
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if (!clk_state) {
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dev_err(dev, "Unexpected clock ID %u\n", in->clock_id);
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out->status = SCMI_NOT_FOUND;
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} else {
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u64 rate = ((u64)in->rate_msb << 32) + in->rate_lsb;
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clk_state->rate = (ulong)rate;
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out->status = SCMI_SUCCESS;
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}
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return 0;
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}
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static int sandbox_scmi_clock_rate_get(struct udevice *dev,
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struct scmi_msg *msg)
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{
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struct sandbox_scmi_agent *agent = dev_get_priv(dev);
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struct scmi_clk_rate_get_in *in = NULL;
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struct scmi_clk_rate_get_out *out = NULL;
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struct sandbox_scmi_clk *clk_state = NULL;
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if (!msg->in_msg || msg->in_msg_sz < sizeof(*in) ||
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!msg->out_msg || msg->out_msg_sz < sizeof(*out))
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return -EINVAL;
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in = (struct scmi_clk_rate_get_in *)msg->in_msg;
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out = (struct scmi_clk_rate_get_out *)msg->out_msg;
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clk_state = get_scmi_clk_state(agent->idx, in->clock_id);
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if (!clk_state) {
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dev_err(dev, "Unexpected clock ID %u\n", in->clock_id);
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out->status = SCMI_NOT_FOUND;
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} else {
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out->rate_msb = (u32)((u64)clk_state->rate >> 32);
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out->rate_lsb = (u32)clk_state->rate;
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out->status = SCMI_SUCCESS;
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}
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return 0;
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}
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static int sandbox_scmi_clock_gate(struct udevice *dev, struct scmi_msg *msg)
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{
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struct sandbox_scmi_agent *agent = dev_get_priv(dev);
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struct scmi_clk_state_in *in = NULL;
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struct scmi_clk_state_out *out = NULL;
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struct sandbox_scmi_clk *clk_state = NULL;
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if (!msg->in_msg || msg->in_msg_sz < sizeof(*in) ||
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!msg->out_msg || msg->out_msg_sz < sizeof(*out))
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return -EINVAL;
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in = (struct scmi_clk_state_in *)msg->in_msg;
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out = (struct scmi_clk_state_out *)msg->out_msg;
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clk_state = get_scmi_clk_state(agent->idx, in->clock_id);
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if (!clk_state) {
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dev_err(dev, "Unexpected clock ID %u\n", in->clock_id);
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out->status = SCMI_NOT_FOUND;
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} else if (in->attributes > 1) {
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out->status = SCMI_PROTOCOL_ERROR;
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} else {
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clk_state->enabled = in->attributes;
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out->status = SCMI_SUCCESS;
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}
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return 0;
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}
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static int sandbox_scmi_rd_attribs(struct udevice *dev, struct scmi_msg *msg)
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{
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struct sandbox_scmi_agent *agent = dev_get_priv(dev);
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struct scmi_rd_attr_in *in = NULL;
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struct scmi_rd_attr_out *out = NULL;
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struct sandbox_scmi_reset *reset_state = NULL;
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if (!msg->in_msg || msg->in_msg_sz < sizeof(*in) ||
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!msg->out_msg || msg->out_msg_sz < sizeof(*out))
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return -EINVAL;
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in = (struct scmi_rd_attr_in *)msg->in_msg;
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out = (struct scmi_rd_attr_out *)msg->out_msg;
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reset_state = get_scmi_reset_state(agent->idx, in->domain_id);
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if (!reset_state) {
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dev_err(dev, "Unexpected reset domain ID %u\n", in->domain_id);
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out->status = SCMI_NOT_FOUND;
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} else {
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memset(out, 0, sizeof(*out));
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snprintf(out->name, sizeof(out->name), "rd%u", in->domain_id);
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out->status = SCMI_SUCCESS;
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}
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return 0;
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}
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static int sandbox_scmi_rd_reset(struct udevice *dev, struct scmi_msg *msg)
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{
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struct sandbox_scmi_agent *agent = dev_get_priv(dev);
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struct scmi_rd_reset_in *in = NULL;
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struct scmi_rd_reset_out *out = NULL;
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struct sandbox_scmi_reset *reset_state = NULL;
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if (!msg->in_msg || msg->in_msg_sz < sizeof(*in) ||
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!msg->out_msg || msg->out_msg_sz < sizeof(*out))
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return -EINVAL;
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in = (struct scmi_rd_reset_in *)msg->in_msg;
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out = (struct scmi_rd_reset_out *)msg->out_msg;
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reset_state = get_scmi_reset_state(agent->idx, in->domain_id);
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if (!reset_state) {
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dev_err(dev, "Unexpected reset domain ID %u\n", in->domain_id);
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out->status = SCMI_NOT_FOUND;
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} else if (in->reset_state > 1) {
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dev_err(dev, "Invalid reset domain input attribute value\n");
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out->status = SCMI_INVALID_PARAMETERS;
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} else {
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if (in->flags & SCMI_RD_RESET_FLAG_CYCLE) {
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if (in->flags & SCMI_RD_RESET_FLAG_ASYNC) {
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out->status = SCMI_NOT_SUPPORTED;
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} else {
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/* Ends deasserted whatever current state */
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reset_state->asserted = false;
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out->status = SCMI_SUCCESS;
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}
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} else {
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reset_state->asserted = in->flags &
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SCMI_RD_RESET_FLAG_ASSERT;
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out->status = SCMI_SUCCESS;
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}
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}
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return 0;
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}
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static int sandbox_scmi_test_process_msg(struct udevice *dev,
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struct scmi_msg *msg)
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{
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switch (msg->protocol_id) {
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case SCMI_PROTOCOL_ID_CLOCK:
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switch (msg->message_id) {
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case SCMI_CLOCK_RATE_SET:
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return sandbox_scmi_clock_rate_set(dev, msg);
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case SCMI_CLOCK_RATE_GET:
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return sandbox_scmi_clock_rate_get(dev, msg);
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case SCMI_CLOCK_CONFIG_SET:
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return sandbox_scmi_clock_gate(dev, msg);
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default:
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break;
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}
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break;
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case SCMI_PROTOCOL_ID_RESET_DOMAIN:
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switch (msg->message_id) {
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case SCMI_RESET_DOMAIN_ATTRIBUTES:
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return sandbox_scmi_rd_attribs(dev, msg);
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case SCMI_RESET_DOMAIN_RESET:
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return sandbox_scmi_rd_reset(dev, msg);
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default:
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break;
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}
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break;
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case SCMI_PROTOCOL_ID_BASE:
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case SCMI_PROTOCOL_ID_POWER_DOMAIN:
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case SCMI_PROTOCOL_ID_SYSTEM:
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case SCMI_PROTOCOL_ID_PERF:
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case SCMI_PROTOCOL_ID_SENSOR:
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*(u32 *)msg->out_msg = SCMI_NOT_SUPPORTED;
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return 0;
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default:
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break;
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}
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dev_err(dev, "%s(%s): Unhandled protocol_id %#x/message_id %#x\n",
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__func__, dev->name, msg->protocol_id, msg->message_id);
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if (msg->out_msg_sz < sizeof(u32))
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return -EINVAL;
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/* Intentionnaly report unhandled IDs through the SCMI return code */
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*(u32 *)msg->out_msg = SCMI_PROTOCOL_ERROR;
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return 0;
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}
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static int sandbox_scmi_test_remove(struct udevice *dev)
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{
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struct sandbox_scmi_agent *agent = dev_get_priv(dev);
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debug_print_agent_state(dev, "removed");
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/* We only need to dereference the agent in the context */
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sandbox_scmi_service_ctx()->agent[agent->idx] = NULL;
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return 0;
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}
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static int sandbox_scmi_test_probe(struct udevice *dev)
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{
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static const char basename[] = "sandbox-scmi-agent@";
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struct sandbox_scmi_agent *agent = dev_get_priv(dev);
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const size_t basename_size = sizeof(basename) - 1;
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if (strncmp(basename, dev->name, basename_size))
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return -ENOENT;
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switch (dev->name[basename_size]) {
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case '0':
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*agent = (struct sandbox_scmi_agent){
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.idx = 0,
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.clk = scmi0_clk,
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.clk_count = ARRAY_SIZE(scmi0_clk),
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.reset = scmi0_reset,
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.reset_count = ARRAY_SIZE(scmi0_reset),
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};
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break;
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case '1':
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*agent = (struct sandbox_scmi_agent){
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.idx = 1,
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.clk = scmi1_clk,
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.clk_count = ARRAY_SIZE(scmi1_clk),
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};
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break;
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default:
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dev_err(dev, "%s(): Unexpected agent ID %s\n",
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__func__, dev->name + basename_size);
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return -ENOENT;
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}
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debug_print_agent_state(dev, "probed");
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/* Save reference for tests purpose */
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sandbox_scmi_service_ctx()->agent[agent->idx] = agent;
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return 0;
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};
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static const struct udevice_id sandbox_scmi_test_ids[] = {
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{ .compatible = "sandbox,scmi-agent" },
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{ }
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};
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struct scmi_agent_ops sandbox_scmi_test_ops = {
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.process_msg = sandbox_scmi_test_process_msg,
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};
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U_BOOT_DRIVER(sandbox_scmi_agent) = {
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.name = "sandbox-scmi_agent",
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.id = UCLASS_SCMI_AGENT,
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.of_match = sandbox_scmi_test_ids,
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.priv_auto_alloc_size = sizeof(struct sandbox_scmi_agent),
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.probe = sandbox_scmi_test_probe,
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.remove = sandbox_scmi_test_remove,
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.ops = &sandbox_scmi_test_ops,
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};
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