From: Maxim Uvarov <maxim.uvarov@linaro.org>
To: linux-kernel@vger.kernel.org, tee-dev@lists.linaro.org
Cc: peterhuewe@gmx.de, jarkko.sakkinen@linux.intel.com, jgg@ziepe.ca,
gregkh@linuxfoundation.org, jens.wiklander@linaro.org,
linux-integrity@vger.kernel.org, arnd@linaro.org,
sumit.garg@linaro.org, Maxim Uvarov <maxim.uvarov@linaro.org>
Subject: [PATCHv8 2/3] optee: enable support for multi-stage bus enumeration
Date: Thu, 4 Jun 2020 20:58:50 +0300 [thread overview]
Message-ID: <20200604175851.758-3-maxim.uvarov@linaro.org> (raw)
In-Reply-To: <20200604175851.758-1-maxim.uvarov@linaro.org>
Some drivers (like ftpm) can operate only after tee-supplicant
runs because of tee-supplicant provides things like storage
services (rpmb, shm). This patch splits probe of non tee-supplicant
dependable drivers to the early stage, and after tee-supplicant run
probe other drivers.
Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>
Suggested-by: Sumit Garg <sumit.garg@linaro.org>
Suggested-by: Arnd Bergmann <arnd@linaro.org>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
---
drivers/tee/optee/core.c | 27 ++++++++++++++++++++++++---
drivers/tee/optee/device.c | 29 +++++++++++------------------
drivers/tee/optee/optee_private.h | 10 +++++++++-
3 files changed, 44 insertions(+), 22 deletions(-)
diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c
index 99698b8a3a74..b373b1b08b6d 100644
--- a/drivers/tee/optee/core.c
+++ b/drivers/tee/optee/core.c
@@ -17,6 +17,7 @@
#include <linux/tee_drv.h>
#include <linux/types.h>
#include <linux/uaccess.h>
+#include <linux/workqueue.h>
#include "optee_private.h"
#include "optee_smc.h"
#include "shm_pool.h"
@@ -218,6 +219,11 @@ static void optee_get_version(struct tee_device *teedev,
*vers = v;
}
+static void optee_bus_scan(struct work_struct *work)
+{
+ WARN_ON(optee_enumerate_devices(PTA_CMD_GET_DEVICES_SUPP));
+}
+
static int optee_open(struct tee_context *ctx)
{
struct optee_context_data *ctxdata;
@@ -241,8 +247,18 @@ static int optee_open(struct tee_context *ctx)
kfree(ctxdata);
return -EBUSY;
}
- }
+ if (!optee->scan_bus_done) {
+ INIT_WORK(&optee->scan_bus_work, optee_bus_scan);
+ optee->scan_bus_wq = create_workqueue("optee_bus_scan");
+ if (!optee->scan_bus_wq) {
+ kfree(ctxdata);
+ return -ECHILD;
+ }
+ queue_work(optee->scan_bus_wq, &optee->scan_bus_work);
+ optee->scan_bus_done = true;
+ }
+ }
mutex_init(&ctxdata->mutex);
INIT_LIST_HEAD(&ctxdata->sess_list);
@@ -296,8 +312,13 @@ static void optee_release(struct tee_context *ctx)
ctx->data = NULL;
- if (teedev == optee->supp_teedev)
+ if (teedev == optee->supp_teedev) {
+ if (optee->scan_bus_wq) {
+ destroy_workqueue(optee->scan_bus_wq);
+ optee->scan_bus_wq = NULL;
+ }
optee_supp_release(&optee->supp);
+ }
}
static const struct tee_driver_ops optee_ops = {
@@ -675,7 +696,7 @@ static int optee_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, optee);
- rc = optee_enumerate_devices();
+ rc = optee_enumerate_devices(PTA_CMD_GET_DEVICES);
if (rc) {
optee_remove(pdev);
return rc;
diff --git a/drivers/tee/optee/device.c b/drivers/tee/optee/device.c
index 23d264c8146e..19260c5740df 100644
--- a/drivers/tee/optee/device.c
+++ b/drivers/tee/optee/device.c
@@ -11,18 +11,6 @@
#include <linux/uuid.h>
#include "optee_private.h"
-/*
- * Get device UUIDs
- *
- * [out] memref[0] Array of device UUIDs
- *
- * Return codes:
- * TEE_SUCCESS - Invoke command success
- * TEE_ERROR_BAD_PARAMETERS - Incorrect input param
- * TEE_ERROR_SHORT_BUFFER - Output buffer size less than required
- */
-#define PTA_CMD_GET_DEVICES 0x0
-
static int optee_ctx_match(struct tee_ioctl_version_data *ver, const void *data)
{
if (ver->impl_id == TEE_IMPL_ID_OPTEE)
@@ -32,7 +20,8 @@ static int optee_ctx_match(struct tee_ioctl_version_data *ver, const void *data)
}
static int get_devices(struct tee_context *ctx, u32 session,
- struct tee_shm *device_shm, u32 *shm_size)
+ struct tee_shm *device_shm, u32 *shm_size,
+ u32 func)
{
int ret = 0;
struct tee_ioctl_invoke_arg inv_arg;
@@ -41,8 +30,7 @@ static int get_devices(struct tee_context *ctx, u32 session,
memset(&inv_arg, 0, sizeof(inv_arg));
memset(¶m, 0, sizeof(param));
- /* Invoke PTA_CMD_GET_DEVICES function */
- inv_arg.func = PTA_CMD_GET_DEVICES;
+ inv_arg.func = func;
inv_arg.session = session;
inv_arg.num_params = 4;
@@ -90,7 +78,7 @@ static int optee_register_device(const uuid_t *device_uuid)
return rc;
}
-int optee_enumerate_devices(void)
+static int __optee_enumerate_devices(u32 func)
{
const uuid_t pta_uuid =
UUID_INIT(0x7011a688, 0xddde, 0x4053,
@@ -121,7 +109,7 @@ int optee_enumerate_devices(void)
goto out_ctx;
}
- rc = get_devices(ctx, sess_arg.session, NULL, &shm_size);
+ rc = get_devices(ctx, sess_arg.session, NULL, &shm_size, func);
if (rc < 0 || !shm_size)
goto out_sess;
@@ -133,7 +121,7 @@ int optee_enumerate_devices(void)
goto out_sess;
}
- rc = get_devices(ctx, sess_arg.session, device_shm, &shm_size);
+ rc = get_devices(ctx, sess_arg.session, device_shm, &shm_size, func);
if (rc < 0)
goto out_shm;
@@ -161,3 +149,8 @@ int optee_enumerate_devices(void)
return rc;
}
+
+int optee_enumerate_devices(u32 func)
+{
+ return __optee_enumerate_devices(func);
+}
diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h
index d9c5037b4e03..8b71839a357e 100644
--- a/drivers/tee/optee/optee_private.h
+++ b/drivers/tee/optee/optee_private.h
@@ -78,6 +78,9 @@ struct optee_supp {
* @memremaped_shm virtual address of memory in shared memory pool
* @sec_caps: secure world capabilities defined by
* OPTEE_SMC_SEC_CAP_* in optee_smc.h
+ * @scan_bus_done flag if device registation was already done.
+ * @scan_bus_wq workqueue to scan optee bus and register optee drivers
+ * @scan_bus_work workq to scan optee bus and register optee drivers
*/
struct optee {
struct tee_device *supp_teedev;
@@ -89,6 +92,9 @@ struct optee {
struct tee_shm_pool *pool;
void *memremaped_shm;
u32 sec_caps;
+ bool scan_bus_done;
+ struct workqueue_struct *scan_bus_wq;
+ struct work_struct scan_bus_work;
};
struct optee_session {
@@ -173,7 +179,9 @@ void optee_free_pages_list(void *array, size_t num_entries);
void optee_fill_pages_list(u64 *dst, struct page **pages, int num_pages,
size_t page_offset);
-int optee_enumerate_devices(void);
+#define PTA_CMD_GET_DEVICES 0x0
+#define PTA_CMD_GET_DEVICES_SUPP 0x1
+int optee_enumerate_devices(u32 func);
/*
* Small helpers
--
2.17.1
next prev parent reply other threads:[~2020-06-04 17:59 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-04 17:58 [PATCHv8 0/3] optee: register drivers on optee bus Maxim Uvarov
2020-06-04 17:58 ` [PATCHv8 1/3] optee: use uuid for sysfs driver entry Maxim Uvarov
2020-06-16 20:50 ` Jarkko Sakkinen
2020-06-17 6:07 ` Sumit Garg
2020-06-17 6:45 ` Maxim Uvarov
2020-06-17 13:58 ` Sumit Garg
2020-06-17 14:12 ` Maxim Uvarov
2020-06-17 15:16 ` [Tee-dev] " Jerome Forissier
2020-06-17 19:52 ` Maxim Uvarov
2020-06-17 20:45 ` Jerome Forissier
2020-06-18 4:59 ` Sumit Garg
2020-06-18 5:12 ` Sumit Garg
2020-06-18 19:18 ` James Bottomley
2020-06-19 8:12 ` Sumit Garg
2020-06-19 15:00 ` James Bottomley
2020-06-24 9:50 ` Jens Wiklander
2020-06-24 10:47 ` Sumit Garg
2020-06-24 15:21 ` James Bottomley
2020-06-24 15:44 ` Jerome Forissier
2020-06-25 12:51 ` Maxim Uvarov
2020-06-26 5:13 ` Sumit Garg
2020-06-26 8:47 ` Andy Shevchenko
2020-06-26 5:26 ` Sumit Garg
2020-06-25 14:24 ` Sumit Garg
2020-06-25 23:31 ` James Bottomley
2020-06-26 5:10 ` Sumit Garg
2020-06-26 7:26 ` Sumit Garg
2020-06-26 11:29 ` Daniel Thompson
2020-06-26 15:11 ` James Bottomley
2020-06-29 6:55 ` Sumit Garg
2020-06-29 7:03 ` Jens Wiklander
2020-06-18 6:57 ` Jerome Forissier
2020-06-18 7:44 ` Maxim Uvarov
2020-06-04 17:58 ` Maxim Uvarov [this message]
2020-06-16 20:56 ` [PATCHv8 2/3] optee: enable support for multi-stage bus enumeration Jarkko Sakkinen
2020-06-04 17:58 ` [PATCHv8 3/3] tpm_ftpm_tee: register driver on TEE bus Maxim Uvarov
2020-06-16 20:57 ` Jarkko Sakkinen
2020-06-15 14:32 ` [PATCHv8 0/3] optee: register drivers on optee bus Maxim Uvarov
2020-06-16 8:29 ` Jens Wiklander
2020-06-17 14:26 ` Maxim Uvarov
2020-06-18 8:00 ` Jens Wiklander
2020-06-17 23:37 ` Jarkko Sakkinen
2020-06-18 7:56 ` Jens Wiklander
2020-06-23 0:50 ` Jarkko Sakkinen
2020-06-16 20:49 ` Jarkko Sakkinen
2020-06-16 20:54 ` Jarkko Sakkinen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200604175851.758-3-maxim.uvarov@linaro.org \
--to=maxim.uvarov@linaro.org \
--cc=arnd@linaro.org \
--cc=gregkh@linuxfoundation.org \
--cc=jarkko.sakkinen@linux.intel.com \
--cc=jens.wiklander@linaro.org \
--cc=jgg@ziepe.ca \
--cc=linux-integrity@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=peterhuewe@gmx.de \
--cc=sumit.garg@linaro.org \
--cc=tee-dev@lists.linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).