msm: ocmem: Enable interaction with secure processor (TZ)
OCMEM memory is not shared among EEs and each allocation is
allowed exclusive access only by the corresponding master.
Add the required infrastructure to achieve this security
by interacting with Trustzone APIs.
Change-Id: I72d1c6e5aa051f48d0aed94164e95a9d5f41bd76
Signed-off-by: Naveen Ramaraj <nramaraj@codeaurora.org>
diff --git a/arch/arm/mach-msm/ocmem_sched.c b/arch/arm/mach-msm/ocmem_sched.c
index 08f93e2..06d9e68 100644
--- a/arch/arm/mach-msm/ocmem_sched.c
+++ b/arch/arm/mach-msm/ocmem_sched.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2012, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -109,6 +109,16 @@
OCMEM_SYSNOC = 3,
};
+enum ocmem_tz_client {
+ TZ_UNUSED = 0x0,
+ TZ_GRAPHICS,
+ TZ_VIDEO,
+ TZ_LP_AUDIO,
+ TZ_SENSORS,
+ TZ_OTHER_OS,
+ TZ_DEBUG,
+};
+
/**
* Primary OCMEM Arbitration Table
**/
@@ -117,15 +127,24 @@
int priority;
int mode;
int hw_interconnect;
+ int tz_id;
} ocmem_client_table[OCMEM_CLIENT_MAX] = {
- {OCMEM_GRAPHICS, PRIO_GFX, OCMEM_PERFORMANCE, OCMEM_PORT},
- {OCMEM_VIDEO, PRIO_VIDEO, OCMEM_PERFORMANCE, OCMEM_OCMEMNOC},
- {OCMEM_CAMERA, NO_PRIO, OCMEM_PERFORMANCE, OCMEM_OCMEMNOC},
- {OCMEM_HP_AUDIO, PRIO_HP_AUDIO, OCMEM_PASSIVE, OCMEM_BLOCKED},
- {OCMEM_VOICE, PRIO_VOICE, OCMEM_PASSIVE, OCMEM_BLOCKED},
- {OCMEM_LP_AUDIO, PRIO_LP_AUDIO, OCMEM_LOW_POWER, OCMEM_SYSNOC},
- {OCMEM_SENSORS, PRIO_SENSORS, OCMEM_LOW_POWER, OCMEM_SYSNOC},
- {OCMEM_OTHER_OS, PRIO_OTHER_OS, OCMEM_LOW_POWER, OCMEM_SYSNOC},
+ {OCMEM_GRAPHICS, PRIO_GFX, OCMEM_PERFORMANCE, OCMEM_PORT,
+ TZ_GRAPHICS},
+ {OCMEM_VIDEO, PRIO_VIDEO, OCMEM_PERFORMANCE, OCMEM_OCMEMNOC,
+ TZ_VIDEO},
+ {OCMEM_CAMERA, NO_PRIO, OCMEM_PERFORMANCE, OCMEM_OCMEMNOC,
+ TZ_UNUSED},
+ {OCMEM_HP_AUDIO, PRIO_HP_AUDIO, OCMEM_PASSIVE, OCMEM_BLOCKED,
+ TZ_UNUSED},
+ {OCMEM_VOICE, PRIO_VOICE, OCMEM_PASSIVE, OCMEM_BLOCKED,
+ TZ_UNUSED},
+ {OCMEM_LP_AUDIO, PRIO_LP_AUDIO, OCMEM_LOW_POWER, OCMEM_SYSNOC,
+ TZ_LP_AUDIO},
+ {OCMEM_SENSORS, PRIO_SENSORS, OCMEM_LOW_POWER, OCMEM_SYSNOC,
+ TZ_SENSORS},
+ {OCMEM_OTHER_OS, PRIO_OTHER_OS, OCMEM_LOW_POWER, OCMEM_SYSNOC,
+ TZ_OTHER_OS},
};
static struct rb_root sched_tree;
@@ -225,6 +244,14 @@
WIDE_MODE : THIN_MODE;
}
+inline int get_tz_id(int id)
+{
+ if (!check_id(id))
+ return TZ_UNUSED;
+ else
+ return ocmem_client_table[id].tz_id;
+}
+
/* Returns the address that can be used by a device core to access OCMEM */
static unsigned long device_address(int id, unsigned long addr)
{
@@ -1986,6 +2013,7 @@
void __iomem *req_vaddr;
unsigned long offset = 0x0;
+ int rc = 0;
down_write(&req->rw_sem);
@@ -1996,12 +2024,23 @@
if (!req_vaddr)
goto err_do_dump;
+ rc = ocmem_enable_dump(req->owner, offset, req->req_sz);
+
+ if (rc < 0)
+ goto err_do_dump;
+
pr_debug("Dumping client %s buffer ocmem p: %lx (v: %p) to ddr %lx\n",
get_name(req->owner), req->req_start,
req_vaddr, addr);
memcpy((void *)addr, req_vaddr, req->req_sz);
+ rc = ocmem_disable_dump(req->owner, offset, req->req_sz);
+
+ if (rc < 0)
+ pr_err("Failed to secure request %p of %s after dump\n",
+ req, get_name(req->owner));
+
up_write(&req->rw_sem);
return 0;
err_do_dump: