mirror of
git://nv-tegra.nvidia.com/linux-nv-oot.git
synced 2025-12-24 10:11:26 +03:00
606f03fbf2
For T23x, we have a separate R5 based cluster named as Display Controller Engine(DCE) to run our Display RM code. This driver will run on CPU with the following functionality: Via debugfs for test and bring-up purposes: 1. Reads the DCE firmware image into DRAM. 2. Sets up DCE AST to cover the DCE firmware image. 3. Sets up R5 reset vector to point to DCE firmware entry point 4. Brings DCE out of reset 5. Dumps various regsiters for debug In production env: 1. Manages interrupts to CPU from DCE 2. Uses bootstrap command interface to define Admin IPC 3. Locks down bootstrap command interface 4. Uses Admin IPC to define message IPC 5. Uses Admin IPC to define message IPC payload area 6. Uses Admin IPC to set IPC channels 6. Uses Admin IPC to define crashdump area (optional) 7. Provides IPC interfaces for any DCE Client running on CCPLEX including Display RM. 8. Uses Admin IPC to set logging level (optional) This patch puts a framework in place with the following features : 1. Firmware Loading 2. AST Configuration 3. DCE Reset with EVP Programming 4. Logging Infra 5. Debugfs Support 6. Interrupt Handling 7. Mailbox Programming 8. IPC Programming 9. DCE Client Interface 10. Ftrace Support for debug purposes Change-Id: Idd28cd9254706c7313f531fcadaa7024a5b344e7 Signed-off-by: Arun Swain <arswain@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-t23x/+/2289865 Reviewed-by: automaticguardword <automaticguardword@nvidia.com> Reviewed-by: Mahesh Kumar <mahkumar@nvidia.com> Reviewed-by: Santosh Galma <galmar@nvidia.com> Reviewed-by: Mitch Luban <mluban@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit Tested-by: Mahesh Kumar <mahkumar@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
103 lines
3.1 KiB
C
103 lines
3.1 KiB
C
/*
|
|
* Copyright (c) 2019-2020, NVIDIA CORPORATION. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
|
|
#ifndef DCE_COND_H
|
|
#define DCE_COND_H
|
|
|
|
#include <linux/wait.h>
|
|
#include <linux/sched.h>
|
|
|
|
struct dce_cond {
|
|
bool initialized;
|
|
wait_queue_head_t wq;
|
|
};
|
|
|
|
/**
|
|
* DCE_COND_WAIT - Wait for a condition to be true
|
|
*
|
|
* @c - The condition variable to sleep on
|
|
* @condition - The condition that needs to be true
|
|
* @timeout_ms - Timeout in milliseconds, or 0 for infinite wait.
|
|
* This parameter must be a u32. Since this is a macro, this is
|
|
* enforced by assigning a typecast NULL pointer to a u32 tmp
|
|
* variable which will generate a compiler warning (or error if
|
|
* the warning is configured as an error).
|
|
*
|
|
* Wait for a condition to become true. Returns -ETIMEOUT if
|
|
* the wait timed out with condition false.
|
|
*/
|
|
#define DCE_COND_WAIT(c, condition, timeout_ms) \
|
|
({\
|
|
int ret = 0; \
|
|
/* This is the assignment to enforce a u32 for timeout_ms */ \
|
|
u32 *tmp = (typeof(timeout_ms) *)NULL; \
|
|
(void)tmp; \
|
|
if (timeout_ms > 0U) { \
|
|
long _ret = wait_event_timeout((c)->wq, condition, \
|
|
msecs_to_jiffies(timeout_ms)); \
|
|
if (_ret == 0) \
|
|
ret = -ETIMEDOUT; \
|
|
} else { \
|
|
wait_event((c)->wq, condition); \
|
|
} \
|
|
ret;\
|
|
})
|
|
|
|
/**
|
|
* DCE_COND_WAIT_INTERRUPTIBLE - Wait for a condition to be true
|
|
*
|
|
* @c - The condition variable to sleep on
|
|
* @condition - The condition that needs to be true
|
|
* @timeout_ms - Timeout in milliseconds, or 0 for infinite wait.
|
|
* This parameter must be a u32. Since this is a macro, this is
|
|
* enforced by assigning a typecast NULL pointer to a u32 tmp
|
|
* variable which will generate a compiler warning (or error if
|
|
* the warning is configured as an error).
|
|
*
|
|
* Wait for a condition to become true. Returns -ETIMEOUT if
|
|
* the wait timed out with condition false or -ERESTARTSYS on
|
|
* signal.
|
|
*/
|
|
#define DCE_COND_WAIT_INTERRUPTIBLE(c, condition, timeout_ms) \
|
|
({ \
|
|
int ret = 0; \
|
|
/* This is the assignment to enforce a u32 for timeout_ms */ \
|
|
u32 *tmp = (typeof(timeout_ms) *)NULL; \
|
|
(void)tmp; \
|
|
if (timeout_ms > 0U) { \
|
|
long _ret = wait_event_interruptible_timeout((c)->wq, \
|
|
condition, msecs_to_jiffies(timeout_ms)); \
|
|
if (_ret == 0) \
|
|
ret = -ETIMEDOUT; \
|
|
else if (_ret == -ERESTARTSYS) \
|
|
ret = -ERESTARTSYS; \
|
|
} else { \
|
|
ret = wait_event_interruptible((c)->wq, condition); \
|
|
} \
|
|
ret; \
|
|
})
|
|
|
|
int dce_cond_init(struct dce_cond *cond);
|
|
|
|
void dce_cond_signal(struct dce_cond *cond);
|
|
|
|
void dce_cond_signal_interruptible(struct dce_cond *cond);
|
|
|
|
int dce_cond_broadcast(struct dce_cond *cond);
|
|
|
|
int dce_cond_broadcast_interruptible(struct dce_cond *cond);
|
|
|
|
void dce_cond_destroy(struct dce_cond *cond);
|
|
|
|
#endif
|