| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <1478711658-23696-4-git-send-email-rf@opensource.wolfsonmicro.com>
Date: Wed, 9 Nov 2016 17:14:17 +0000
From: Richard Fitzgerald <rf@...nsource.wolfsonmicro.com>
To: <broonie@...nel.org>
CC: <patches@...nsource.wolfsonmicro.com>,
<alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 4/5] ASoC: wm_adsp: Signal firmware shutdown through event control
If the firmware has any system event signalling controls, signal
them during DSP PRE_PMD to tell the firmware it is about to be stopped.
Signed-off-by: Richard Fitzgerald <rf@...nsource.wolfsonmicro.com>
---
sound/soc/codecs/wm_adsp.c | 114 +++++++++++++++++++++++++++++++++++++++++++++
sound/soc/codecs/wmfw.h | 3 ++
2 files changed, 117 insertions(+)
diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 82bb3dc..bdbcc44 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -162,6 +162,14 @@
#define ADSP_MAX_STD_CTRL_SIZE 512
+#define WM_ADSP_ACKED_CTL_TIMEOUT_MS 100
+#define WM_ADSP_ACKED_CTL_N_QUICKPOLLS 10
+
+/*
+ * Event control messages
+ */
+#define WM_ADSP_FW_EVENT_SHUTDOWN 0x000001
+
struct wm_adsp_buf {
struct list_head list;
void *buf;
@@ -776,6 +784,66 @@ static int wm_coeff_info(struct snd_kcontrol *kctl,
return 0;
}
+static int wm_coeff_write_acked_control(struct wm_coeff_ctl *ctl,
+ unsigned int event_id)
+{
+ struct wm_adsp *dsp = ctl->dsp;
+ u32 val = cpu_to_be32(event_id);
+ unsigned int reg;
+ int i, ret;
+
+ ret = wm_coeff_base_reg(ctl, ®);
+ if (ret)
+ return ret;
+
+ adsp_dbg(dsp, "Sending 0x%x to acked control alg 0x%x %s:0x%x\n",
+ event_id, ctl->alg_region.alg,
+ wm_adsp_mem_region_name(ctl->alg_region.type), ctl->offset);
+
+ ret = regmap_raw_write(dsp->regmap, reg, &val, sizeof(val));
+ if (ret) {
+ adsp_err(dsp, "Failed to write %x: %d\n", reg, ret);
+ return ret;
+ }
+
+ /*
+ * Poll for ack, we initially poll at ~1ms intervals for firmwares
+ * that respond quickly, then go to ~10ms polls. A firmware is unlikely
+ * to ack instantly so we do the first 1ms delay before reading the
+ * control to avoid a pointless bus transaction
+ */
+ for (i = 0; i < WM_ADSP_ACKED_CTL_TIMEOUT_MS;) {
+ switch (i) {
+ case 0 ... WM_ADSP_ACKED_CTL_N_QUICKPOLLS - 1:
+ usleep_range(1000, 2000);
+ i++;
+ break;
+ default:
+ usleep_range(10000, 20000);
+ i += 10;
+ break;
+ }
+
+ ret = regmap_raw_read(dsp->regmap, reg, &val, sizeof(val));
+ if (ret) {
+ adsp_err(dsp, "Failed to read %x: %d\n", reg, ret);
+ return ret;
+ }
+
+ if (val == 0) {
+ adsp_dbg(dsp, "Acked control ACKED at poll %u\n", i);
+ return 0;
+ }
+ }
+
+ adsp_warn(dsp, "Acked control @0x%x alg:0x%x %s:0x%x timed out\n",
+ reg, ctl->alg_region.alg,
+ wm_adsp_mem_region_name(ctl->alg_region.type),
+ ctl->offset);
+
+ return -ETIMEDOUT;
+}
+
static int wm_coeff_write_control(struct wm_coeff_ctl *ctl,
const void *buf, size_t len)
{
@@ -1055,6 +1123,24 @@ static int wm_coeff_sync_controls(struct wm_adsp *dsp)
return 0;
}
+static void wm_adsp_signal_event_controls(struct wm_adsp *dsp,
+ unsigned int event)
+{
+ struct wm_coeff_ctl *ctl;
+ int ret;
+
+ list_for_each_entry(ctl, &dsp->ctl_list, list) {
+ if (ctl->type != WMFW_CTL_TYPE_HOSTEVENT)
+ continue;
+
+ ret = wm_coeff_write_acked_control(ctl, event);
+ if (ret)
+ adsp_warn(dsp,
+ "Failed to send 0x%x event to alg 0x%x (%d)\n",
+ event, ctl->alg_region.alg, ret);
+ }
+}
+
static void wm_adsp_ctl_work(struct work_struct *work)
{
struct wmfw_ctl_work *ctl_work = container_of(work,
@@ -1314,6 +1400,21 @@ static inline void wm_coeff_parse_coeff(struct wm_adsp *dsp, const u8 **data,
adsp_dbg(dsp, "\tALSA control len: %#x\n", blk->len);
}
+static int wm_adsp_check_coeff_flags(struct wm_adsp *dsp,
+ const struct wm_coeff_parsed_coeff *coeff_blk,
+ unsigned int f_required,
+ unsigned int f_illegal)
+{
+ if ((coeff_blk->flags & f_illegal) ||
+ ((coeff_blk->flags & f_required) != f_required)) {
+ adsp_err(dsp, "Illegal flags 0x%x for control type 0x%x\n",
+ coeff_blk->flags, coeff_blk->ctl_type);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static int wm_adsp_parse_coeff(struct wm_adsp *dsp,
const struct wmfw_region *region)
{
@@ -1330,6 +1431,16 @@ static int wm_adsp_parse_coeff(struct wm_adsp *dsp,
switch (coeff_blk.ctl_type) {
case SNDRV_CTL_ELEM_TYPE_BYTES:
break;
+ case WMFW_CTL_TYPE_HOSTEVENT:
+ ret = wm_adsp_check_coeff_flags(dsp, &coeff_blk,
+ WMFW_CTL_FLAG_SYS |
+ WMFW_CTL_FLAG_VOLATILE |
+ WMFW_CTL_FLAG_WRITEABLE |
+ WMFW_CTL_FLAG_READABLE,
+ 0);
+ if (ret)
+ return -EINVAL;
+ break;
default:
adsp_err(dsp, "Unknown control type: %d\n",
coeff_blk.ctl_type);
@@ -2401,6 +2512,9 @@ int wm_adsp2_event(struct snd_soc_dapm_widget *w,
break;
case SND_SOC_DAPM_PRE_PMD:
+ /* Tell the firmware to cleanup */
+ wm_adsp_signal_event_controls(dsp, WM_ADSP_FW_EVENT_SHUTDOWN);
+
/* Log firmware state, it can be useful for analysis */
wm_adsp2_show_fw_status(dsp);
diff --git a/sound/soc/codecs/wmfw.h b/sound/soc/codecs/wmfw.h
index 7613d60..892fc74 100644
--- a/sound/soc/codecs/wmfw.h
+++ b/sound/soc/codecs/wmfw.h
@@ -26,6 +26,9 @@
#define WMFW_CTL_FLAG_WRITEABLE 0x0002
#define WMFW_CTL_FLAG_READABLE 0x0001
+/* Non-ALSA coefficient types start at 0x1000 */
+#define WMFW_CTL_TYPE_HOSTEVENT 0x1001 /* event control */
+
struct wmfw_header {
char magic[4];
__le32 len;
--
1.9.1
Powered by blists - more mailing lists