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Date: Tue, 18 Oct 2022 14:10:46 -0700
From: Gokul krishna Krishnakumar <quic_gokukris@...cinc.com>
To: Andy Gross <agross@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@...ainline.org>,
Mathieu Poirier <mathieu.poirier@...aro.org>
CC: <linux-arm-msm@...r.kernel.org>,
<linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
Trilok Soni <quic_tsoni@...cinc.com>,
"Satya Durga Srinivasu Prabhala" <quic_satyap@...cinc.com>,
Rajendra Nayak <quic_rjendra@...cinc.com>,
Elliot Berman <quic_eberman@...cinc.com>,
"Guru Das Srinagesh" <quic_gurus@...cinc.com>,
Gokul krishna Krishnakumar <quic_gokukris@...cinc.com>
Subject: [PATCH v1 1/1] drivers: remoteproc: Add bus scaling capability during bootup
During bootup since remote processors cannot request for
additional bus bandwidth from the interconect framework,
platform driver should provide the proxy resources. Make
a proxy vote for maximizing the bus bandwidth during bootup
for a remote processor and remove it once processor is up.
Change-Id: I798b3b000aef4761a7ff8cb6390b7ecd98f925b7
Signed-off-by: Gokul krishna Krishnakumar <quic_gokukris@...cinc.com>
---
drivers/remoteproc/qcom_q6v5_pas.c | 106 ++++++++++++++++++++++++++++++++++---
1 file changed, 100 insertions(+), 6 deletions(-)
diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c
index 6afd094..b02a1dc 100644
--- a/drivers/remoteproc/qcom_q6v5_pas.c
+++ b/drivers/remoteproc/qcom_q6v5_pas.c
@@ -21,6 +21,7 @@
#include <linux/qcom_scm.h>
#include <linux/regulator/consumer.h>
#include <linux/remoteproc.h>
+#include <linux/interconnect.h>
#include <linux/soc/qcom/mdt_loader.h>
#include <linux/soc/qcom/smem.h>
#include <linux/soc/qcom/smem_state.h>
@@ -30,8 +31,14 @@
#include "qcom_q6v5.h"
#include "remoteproc_internal.h"
+#define PIL_TZ_AVG_BW UINT_MAX
+#define PIL_TZ_PEAK_BW UINT_MAX
#define ADSP_DECRYPT_SHUTDOWN_DELAY_MS 100
+static struct icc_path *scm_perf_client;
+static int scm_pas_bw_count;
+static DEFINE_MUTEX(scm_pas_bw_mutex);
+
struct adsp_data {
int crash_reason_smem;
const char *firmware_name;
@@ -67,6 +74,7 @@ struct qcom_adsp {
int pas_id;
unsigned int minidump_id;
+ struct icc_path *bus_client;
int crash_reason_smem;
bool has_aggre2_clk;
bool decrypt_shutdown;
@@ -136,6 +144,44 @@ static void adsp_pds_disable(struct qcom_adsp *adsp, struct device **pds,
}
}
+static int scm_pas_enable_bw(void)
+{
+ int ret = 0;
+
+ if (IS_ERR(scm_perf_client))
+ return -EINVAL;
+
+ mutex_lock(&scm_pas_bw_mutex);
+ if (!scm_pas_bw_count) {
+ ret = icc_set_bw(scm_perf_client, PIL_TZ_AVG_BW,
+ PIL_TZ_PEAK_BW);
+ if (ret)
+ goto err_bus;
+ }
+
+ scm_pas_bw_count++;
+ mutex_unlock(&scm_pas_bw_mutex);
+ return ret;
+
+err_bus:
+ pr_err("scm-pas: Bandwidth request failed (%d)\n", ret);
+ icc_set_bw(scm_perf_client, 0, 0);
+
+ mutex_unlock(&scm_pas_bw_mutex);
+ return ret;
+}
+
+static void scm_pas_disable_bw(void)
+{
+ if (IS_ERR(scm_perf_client))
+ return;
+
+ mutex_lock(&scm_pas_bw_mutex);
+ if (scm_pas_bw_count-- == 1)
+ icc_set_bw(scm_perf_client, 0, 0);
+ mutex_unlock(&scm_pas_bw_mutex);
+}
+
static int adsp_shutdown_poll_decrypt(struct qcom_adsp *adsp)
{
unsigned int retry_num = 50;
@@ -174,15 +220,35 @@ static int adsp_load(struct rproc *rproc, const struct firmware *fw)
if (ret)
return ret;
+ scm_pas_enable_bw();
ret = qcom_mdt_load_no_init(adsp->dev, fw, rproc->firmware, adsp->pas_id,
adsp->mem_region, adsp->mem_phys, adsp->mem_size,
&adsp->mem_reloc);
if (ret)
- return ret;
+ goto exit;
qcom_pil_info_store(adsp->info_name, adsp->mem_phys, adsp->mem_size);
+exit:
+ scm_pas_disable_bw();
+ return ret;
+}
- return 0;
+static int do_bus_scaling(struct qcom_adsp *adsp, bool enable)
+{
+ int rc = 0;
+ u32 avg_bw = enable ? PIL_TZ_AVG_BW : 0;
+ u32 peak_bw = enable ? PIL_TZ_PEAK_BW : 0;
+
+ if (IS_ERR(adsp->bus_client))
+ dev_err(adsp->dev, "Bus scaling not setup for %s\n",
+ adsp->rproc->name);
+ else
+ rc = icc_set_bw(adsp->bus_client, avg_bw, peak_bw);
+
+ if (rc)
+ dev_err(adsp->dev, "bandwidth request failed(rc:%d)\n", rc);
+
+ return rc;
}
static int adsp_start(struct rproc *rproc)
@@ -194,10 +260,14 @@ static int adsp_start(struct rproc *rproc)
if (ret)
return ret;
- ret = adsp_pds_enable(adsp, adsp->proxy_pds, adsp->proxy_pd_count);
+ ret = do_bus_scaling(adsp, true);
if (ret < 0)
goto disable_irqs;
+ ret = adsp_pds_enable(adsp, adsp->proxy_pds, adsp->proxy_pd_count);
+ if (ret < 0)
+ goto unscale_bus;
+
ret = clk_prepare_enable(adsp->xo);
if (ret)
goto disable_proxy_pds;
@@ -218,6 +288,8 @@ static int adsp_start(struct rproc *rproc)
goto disable_cx_supply;
}
+ scm_pas_enable_bw();
+
ret = qcom_scm_pas_auth_and_reset(adsp->pas_id);
if (ret) {
dev_err(adsp->dev,
@@ -234,9 +306,10 @@ static int adsp_start(struct rproc *rproc)
qcom_scm_pas_metadata_release(&adsp->pas_metadata);
- return 0;
-
disable_px_supply:
+ scm_pas_disable_bw();
+ if(!ret)
+ goto exit;
if (adsp->px_supply)
regulator_disable(adsp->px_supply);
disable_cx_supply:
@@ -248,9 +321,11 @@ static int adsp_start(struct rproc *rproc)
clk_disable_unprepare(adsp->xo);
disable_proxy_pds:
adsp_pds_disable(adsp, adsp->proxy_pds, adsp->proxy_pd_count);
+unscale_bus:
+ do_bus_scaling(adsp, false);
disable_irqs:
qcom_q6v5_unprepare(&adsp->q6v5);
-
+exit:
return ret;
}
@@ -265,6 +340,7 @@ static void qcom_pas_handover(struct qcom_q6v5 *q6v5)
clk_disable_unprepare(adsp->aggre2_clk);
clk_disable_unprepare(adsp->xo);
adsp_pds_disable(adsp, adsp->proxy_pds, adsp->proxy_pd_count);
+ do_bus_scaling(adsp, false);
}
static int adsp_stop(struct rproc *rproc)
@@ -383,6 +459,22 @@ static int adsp_init_regulator(struct qcom_adsp *adsp)
return 0;
}
+static void adsp_init_bus_scaling(struct qcom_adsp *adsp)
+{
+ if (scm_perf_client)
+ goto get_rproc_client;
+
+ scm_perf_client = of_icc_get(adsp->dev, "crypto_ddr");
+ if (IS_ERR(scm_perf_client))
+ dev_warn(adsp->dev, "Crypto scaling not setup\n");
+
+get_rproc_client:
+ adsp->bus_client = of_icc_get(adsp->dev, "rproc_ddr");
+ if (IS_ERR(adsp->bus_client))
+ dev_warn(adsp->dev, "%s: No bus client\n", __func__);
+
+}
+
static int adsp_pds_attach(struct device *dev, struct device **devs,
char **pd_names)
{
@@ -525,6 +617,8 @@ static int adsp_probe(struct platform_device *pdev)
if (ret)
goto free_rproc;
+ adsp_init_bus_scaling(adsp);
+
ret = adsp_pds_attach(&pdev->dev, adsp->proxy_pds,
desc->proxy_pd_names);
if (ret < 0)
--
2.7.4
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