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![Mikko Perttunen](/assets/img/avatar_default.png)
The Tegra194 BPMP only implements 5 channels (4 to BPMP, 1 to CCPLEX), and they are not placed contiguously in memory. The current channel management in the BPMP driver does not support this. Simplify and refactor the channel management such that only one atomic transmit channel and one receive channel are supported, and channels are not required to be placed contiguously in memory. The same configuration also works on T186 so we end up with less code. Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
206 lines
4.5 KiB
C
206 lines
4.5 KiB
C
/*
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* Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#ifndef __SOC_TEGRA_BPMP_H
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#define __SOC_TEGRA_BPMP_H
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#include <linux/mailbox_client.h>
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#include <linux/pm_domain.h>
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#include <linux/reset-controller.h>
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#include <linux/semaphore.h>
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#include <linux/types.h>
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#include <soc/tegra/bpmp-abi.h>
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struct tegra_bpmp_clk;
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struct tegra_bpmp_soc {
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struct {
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struct {
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unsigned int offset;
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unsigned int count;
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unsigned int timeout;
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} cpu_tx, thread, cpu_rx;
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} channels;
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unsigned int num_resets;
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};
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struct tegra_bpmp_mb_data {
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u32 code;
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u32 flags;
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u8 data[MSG_DATA_MIN_SZ];
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} __packed;
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struct tegra_bpmp_channel {
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struct tegra_bpmp *bpmp;
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struct tegra_bpmp_mb_data *ib;
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struct tegra_bpmp_mb_data *ob;
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struct completion completion;
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struct tegra_ivc *ivc;
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};
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typedef void (*tegra_bpmp_mrq_handler_t)(unsigned int mrq,
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struct tegra_bpmp_channel *channel,
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void *data);
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struct tegra_bpmp_mrq {
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struct list_head list;
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unsigned int mrq;
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tegra_bpmp_mrq_handler_t handler;
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void *data;
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};
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struct tegra_bpmp {
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const struct tegra_bpmp_soc *soc;
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struct device *dev;
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struct {
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struct gen_pool *pool;
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dma_addr_t phys;
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void *virt;
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} tx, rx;
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struct {
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struct mbox_client client;
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struct mbox_chan *channel;
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} mbox;
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spinlock_t atomic_tx_lock;
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struct tegra_bpmp_channel *tx_channel, *rx_channel, *threaded_channels;
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struct {
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unsigned long *allocated;
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unsigned long *busy;
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unsigned int count;
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struct semaphore lock;
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} threaded;
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struct list_head mrqs;
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spinlock_t lock;
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struct tegra_bpmp_clk **clocks;
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unsigned int num_clocks;
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struct reset_controller_dev rstc;
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struct genpd_onecell_data genpd;
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#ifdef CONFIG_DEBUG_FS
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struct dentry *debugfs_mirror;
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#endif
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};
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struct tegra_bpmp_message {
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unsigned int mrq;
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struct {
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const void *data;
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size_t size;
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} tx;
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struct {
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void *data;
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size_t size;
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int ret;
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} rx;
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};
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#if IS_ENABLED(CONFIG_TEGRA_BPMP)
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struct tegra_bpmp *tegra_bpmp_get(struct device *dev);
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void tegra_bpmp_put(struct tegra_bpmp *bpmp);
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int tegra_bpmp_transfer_atomic(struct tegra_bpmp *bpmp,
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struct tegra_bpmp_message *msg);
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int tegra_bpmp_transfer(struct tegra_bpmp *bpmp,
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struct tegra_bpmp_message *msg);
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void tegra_bpmp_mrq_return(struct tegra_bpmp_channel *channel, int code,
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const void *data, size_t size);
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int tegra_bpmp_request_mrq(struct tegra_bpmp *bpmp, unsigned int mrq,
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tegra_bpmp_mrq_handler_t handler, void *data);
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void tegra_bpmp_free_mrq(struct tegra_bpmp *bpmp, unsigned int mrq,
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void *data);
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#else
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static inline struct tegra_bpmp *tegra_bpmp_get(struct device *dev)
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{
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return ERR_PTR(-ENOTSUPP);
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}
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static inline void tegra_bpmp_put(struct tegra_bpmp *bpmp)
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{
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}
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static inline int tegra_bpmp_transfer_atomic(struct tegra_bpmp *bpmp,
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struct tegra_bpmp_message *msg)
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{
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return -ENOTSUPP;
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}
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static inline int tegra_bpmp_transfer(struct tegra_bpmp *bpmp,
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struct tegra_bpmp_message *msg)
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{
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return -ENOTSUPP;
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}
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static inline void tegra_bpmp_mrq_return(struct tegra_bpmp_channel *channel,
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int code, const void *data,
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size_t size)
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{
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}
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static inline int tegra_bpmp_request_mrq(struct tegra_bpmp *bpmp,
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unsigned int mrq,
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tegra_bpmp_mrq_handler_t handler,
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void *data)
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{
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return -ENOTSUPP;
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}
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static inline void tegra_bpmp_free_mrq(struct tegra_bpmp *bpmp,
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unsigned int mrq, void *data)
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{
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}
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#endif
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#if IS_ENABLED(CONFIG_CLK_TEGRA_BPMP)
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int tegra_bpmp_init_clocks(struct tegra_bpmp *bpmp);
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#else
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static inline int tegra_bpmp_init_clocks(struct tegra_bpmp *bpmp)
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{
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return 0;
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}
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#endif
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#if IS_ENABLED(CONFIG_RESET_TEGRA_BPMP)
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int tegra_bpmp_init_resets(struct tegra_bpmp *bpmp);
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#else
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static inline int tegra_bpmp_init_resets(struct tegra_bpmp *bpmp)
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{
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return 0;
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}
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#endif
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#if IS_ENABLED(CONFIG_SOC_TEGRA_POWERGATE_BPMP)
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int tegra_bpmp_init_powergates(struct tegra_bpmp *bpmp);
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#else
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static inline int tegra_bpmp_init_powergates(struct tegra_bpmp *bpmp)
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{
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return 0;
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}
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#endif
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#if IS_ENABLED(CONFIG_DEBUG_FS)
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int tegra_bpmp_init_debugfs(struct tegra_bpmp *bpmp);
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#else
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static inline int tegra_bpmp_init_debugfs(struct tegra_bpmp *bpmp)
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{
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return 0;
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}
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#endif
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#endif /* __SOC_TEGRA_BPMP_H */
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