444 lines
9.8 KiB
C
444 lines
9.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
//
|
|
// Copyright (c) 2018 MediaTek Inc.
|
|
|
|
#include <linux/completion.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mailbox_controller.h>
|
|
#include <linux/soc/mediatek/mtk-cmdq.h>
|
|
|
|
#define CMDQ_WRITE_ENABLE_MASK BIT(0)
|
|
#define CMDQ_POLL_ENABLE_MASK BIT(0)
|
|
#define CMDQ_EOC_IRQ_EN BIT(0)
|
|
#define CMDQ_REG_TYPE 1
|
|
#define CMDQ_JUMP_RELATIVE 1
|
|
|
|
struct cmdq_instruction {
|
|
union {
|
|
u32 value;
|
|
u32 mask;
|
|
struct {
|
|
u16 arg_c;
|
|
u16 src_reg;
|
|
};
|
|
};
|
|
union {
|
|
u16 offset;
|
|
u16 event;
|
|
u16 reg_dst;
|
|
};
|
|
union {
|
|
u8 subsys;
|
|
struct {
|
|
u8 sop:5;
|
|
u8 arg_c_t:1;
|
|
u8 src_t:1;
|
|
u8 dst_t:1;
|
|
};
|
|
};
|
|
u8 op;
|
|
};
|
|
|
|
int cmdq_dev_get_client_reg(struct device *dev,
|
|
struct cmdq_client_reg *client_reg, int idx)
|
|
{
|
|
struct of_phandle_args spec;
|
|
int err;
|
|
|
|
if (!client_reg)
|
|
return -ENOENT;
|
|
|
|
err = of_parse_phandle_with_fixed_args(dev->of_node,
|
|
"mediatek,gce-client-reg",
|
|
3, idx, &spec);
|
|
if (err < 0) {
|
|
dev_err(dev,
|
|
"error %d can't parse gce-client-reg property (%d)",
|
|
err, idx);
|
|
|
|
return err;
|
|
}
|
|
|
|
client_reg->subsys = (u8)spec.args[0];
|
|
client_reg->offset = (u16)spec.args[1];
|
|
client_reg->size = (u16)spec.args[2];
|
|
of_node_put(spec.np);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(cmdq_dev_get_client_reg);
|
|
|
|
struct cmdq_client *cmdq_mbox_create(struct device *dev, int index)
|
|
{
|
|
struct cmdq_client *client;
|
|
|
|
client = kzalloc(sizeof(*client), GFP_KERNEL);
|
|
if (!client)
|
|
return (struct cmdq_client *)-ENOMEM;
|
|
|
|
client->client.dev = dev;
|
|
client->client.tx_block = false;
|
|
client->client.knows_txdone = true;
|
|
client->chan = mbox_request_channel(&client->client, index);
|
|
|
|
if (IS_ERR(client->chan)) {
|
|
long err;
|
|
|
|
dev_err(dev, "failed to request channel\n");
|
|
err = PTR_ERR(client->chan);
|
|
kfree(client);
|
|
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
return client;
|
|
}
|
|
EXPORT_SYMBOL(cmdq_mbox_create);
|
|
|
|
void cmdq_mbox_destroy(struct cmdq_client *client)
|
|
{
|
|
mbox_free_channel(client->chan);
|
|
kfree(client);
|
|
}
|
|
EXPORT_SYMBOL(cmdq_mbox_destroy);
|
|
|
|
struct cmdq_pkt *cmdq_pkt_create(struct cmdq_client *client, size_t size)
|
|
{
|
|
struct cmdq_pkt *pkt;
|
|
struct device *dev;
|
|
dma_addr_t dma_addr;
|
|
|
|
pkt = kzalloc(sizeof(*pkt), GFP_KERNEL);
|
|
if (!pkt)
|
|
return ERR_PTR(-ENOMEM);
|
|
pkt->va_base = kzalloc(size, GFP_KERNEL);
|
|
if (!pkt->va_base) {
|
|
kfree(pkt);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
pkt->buf_size = size;
|
|
pkt->cl = (void *)client;
|
|
|
|
dev = client->chan->mbox->dev;
|
|
dma_addr = dma_map_single(dev, pkt->va_base, pkt->buf_size,
|
|
DMA_TO_DEVICE);
|
|
if (dma_mapping_error(dev, dma_addr)) {
|
|
dev_err(dev, "dma map failed, size=%u\n", (u32)(u64)size);
|
|
kfree(pkt->va_base);
|
|
kfree(pkt);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
pkt->pa_base = dma_addr;
|
|
|
|
return pkt;
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_create);
|
|
|
|
void cmdq_pkt_destroy(struct cmdq_pkt *pkt)
|
|
{
|
|
struct cmdq_client *client = (struct cmdq_client *)pkt->cl;
|
|
|
|
dma_unmap_single(client->chan->mbox->dev, pkt->pa_base, pkt->buf_size,
|
|
DMA_TO_DEVICE);
|
|
kfree(pkt->va_base);
|
|
kfree(pkt);
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_destroy);
|
|
|
|
static int cmdq_pkt_append_command(struct cmdq_pkt *pkt,
|
|
struct cmdq_instruction inst)
|
|
{
|
|
struct cmdq_instruction *cmd_ptr;
|
|
|
|
if (unlikely(pkt->cmd_buf_size + CMDQ_INST_SIZE > pkt->buf_size)) {
|
|
/*
|
|
* In the case of allocated buffer size (pkt->buf_size) is used
|
|
* up, the real required size (pkt->cmdq_buf_size) is still
|
|
* increased, so that the user knows how much memory should be
|
|
* ultimately allocated after appending all commands and
|
|
* flushing the command packet. Therefor, the user can call
|
|
* cmdq_pkt_create() again with the real required buffer size.
|
|
*/
|
|
pkt->cmd_buf_size += CMDQ_INST_SIZE;
|
|
WARN_ONCE(1, "%s: buffer size %u is too small !\n",
|
|
__func__, (u32)pkt->buf_size);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
cmd_ptr = pkt->va_base + pkt->cmd_buf_size;
|
|
*cmd_ptr = inst;
|
|
pkt->cmd_buf_size += CMDQ_INST_SIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int cmdq_pkt_write(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value)
|
|
{
|
|
struct cmdq_instruction inst;
|
|
|
|
inst.op = CMDQ_CODE_WRITE;
|
|
inst.value = value;
|
|
inst.offset = offset;
|
|
inst.subsys = subsys;
|
|
|
|
return cmdq_pkt_append_command(pkt, inst);
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_write);
|
|
|
|
int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys,
|
|
u16 offset, u32 value, u32 mask)
|
|
{
|
|
struct cmdq_instruction inst = { {0} };
|
|
u16 offset_mask = offset;
|
|
int err;
|
|
|
|
if (mask != 0xffffffff) {
|
|
inst.op = CMDQ_CODE_MASK;
|
|
inst.mask = ~mask;
|
|
err = cmdq_pkt_append_command(pkt, inst);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
offset_mask |= CMDQ_WRITE_ENABLE_MASK;
|
|
}
|
|
err = cmdq_pkt_write(pkt, subsys, offset_mask, value);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_write_mask);
|
|
|
|
int cmdq_pkt_read_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, u16 addr_low,
|
|
u16 reg_idx)
|
|
{
|
|
struct cmdq_instruction inst = {};
|
|
|
|
inst.op = CMDQ_CODE_READ_S;
|
|
inst.dst_t = CMDQ_REG_TYPE;
|
|
inst.sop = high_addr_reg_idx;
|
|
inst.reg_dst = reg_idx;
|
|
inst.src_reg = addr_low;
|
|
|
|
return cmdq_pkt_append_command(pkt, inst);
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_read_s);
|
|
|
|
int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
|
|
u16 addr_low, u16 src_reg_idx)
|
|
{
|
|
struct cmdq_instruction inst = {};
|
|
|
|
inst.op = CMDQ_CODE_WRITE_S;
|
|
inst.src_t = CMDQ_REG_TYPE;
|
|
inst.sop = high_addr_reg_idx;
|
|
inst.offset = addr_low;
|
|
inst.src_reg = src_reg_idx;
|
|
|
|
return cmdq_pkt_append_command(pkt, inst);
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_write_s);
|
|
|
|
int cmdq_pkt_write_s_mask(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
|
|
u16 addr_low, u16 src_reg_idx, u32 mask)
|
|
{
|
|
struct cmdq_instruction inst = {};
|
|
int err;
|
|
|
|
inst.op = CMDQ_CODE_MASK;
|
|
inst.mask = ~mask;
|
|
err = cmdq_pkt_append_command(pkt, inst);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
inst.mask = 0;
|
|
inst.op = CMDQ_CODE_WRITE_S_MASK;
|
|
inst.src_t = CMDQ_REG_TYPE;
|
|
inst.sop = high_addr_reg_idx;
|
|
inst.offset = addr_low;
|
|
inst.src_reg = src_reg_idx;
|
|
|
|
return cmdq_pkt_append_command(pkt, inst);
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_write_s_mask);
|
|
|
|
int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
|
|
u16 addr_low, u32 value)
|
|
{
|
|
struct cmdq_instruction inst = {};
|
|
|
|
inst.op = CMDQ_CODE_WRITE_S;
|
|
inst.sop = high_addr_reg_idx;
|
|
inst.offset = addr_low;
|
|
inst.value = value;
|
|
|
|
return cmdq_pkt_append_command(pkt, inst);
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_write_s_value);
|
|
|
|
int cmdq_pkt_write_s_mask_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
|
|
u16 addr_low, u32 value, u32 mask)
|
|
{
|
|
struct cmdq_instruction inst = {};
|
|
int err;
|
|
|
|
inst.op = CMDQ_CODE_MASK;
|
|
inst.mask = ~mask;
|
|
err = cmdq_pkt_append_command(pkt, inst);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
inst.op = CMDQ_CODE_WRITE_S_MASK;
|
|
inst.sop = high_addr_reg_idx;
|
|
inst.offset = addr_low;
|
|
inst.value = value;
|
|
|
|
return cmdq_pkt_append_command(pkt, inst);
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_write_s_mask_value);
|
|
|
|
int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event, bool clear)
|
|
{
|
|
struct cmdq_instruction inst = { {0} };
|
|
u32 clear_option = clear ? CMDQ_WFE_UPDATE : 0;
|
|
|
|
if (event >= CMDQ_MAX_EVENT)
|
|
return -EINVAL;
|
|
|
|
inst.op = CMDQ_CODE_WFE;
|
|
inst.value = CMDQ_WFE_OPTION | clear_option;
|
|
inst.event = event;
|
|
|
|
return cmdq_pkt_append_command(pkt, inst);
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_wfe);
|
|
|
|
int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event)
|
|
{
|
|
struct cmdq_instruction inst = { {0} };
|
|
|
|
if (event >= CMDQ_MAX_EVENT)
|
|
return -EINVAL;
|
|
|
|
inst.op = CMDQ_CODE_WFE;
|
|
inst.value = CMDQ_WFE_UPDATE;
|
|
inst.event = event;
|
|
|
|
return cmdq_pkt_append_command(pkt, inst);
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_clear_event);
|
|
|
|
int cmdq_pkt_set_event(struct cmdq_pkt *pkt, u16 event)
|
|
{
|
|
struct cmdq_instruction inst = {};
|
|
|
|
if (event >= CMDQ_MAX_EVENT)
|
|
return -EINVAL;
|
|
|
|
inst.op = CMDQ_CODE_WFE;
|
|
inst.value = CMDQ_WFE_UPDATE | CMDQ_WFE_UPDATE_VALUE;
|
|
inst.event = event;
|
|
|
|
return cmdq_pkt_append_command(pkt, inst);
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_set_event);
|
|
|
|
int cmdq_pkt_poll(struct cmdq_pkt *pkt, u8 subsys,
|
|
u16 offset, u32 value)
|
|
{
|
|
struct cmdq_instruction inst = { {0} };
|
|
int err;
|
|
|
|
inst.op = CMDQ_CODE_POLL;
|
|
inst.value = value;
|
|
inst.offset = offset;
|
|
inst.subsys = subsys;
|
|
err = cmdq_pkt_append_command(pkt, inst);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_poll);
|
|
|
|
int cmdq_pkt_poll_mask(struct cmdq_pkt *pkt, u8 subsys,
|
|
u16 offset, u32 value, u32 mask)
|
|
{
|
|
struct cmdq_instruction inst = { {0} };
|
|
int err;
|
|
|
|
inst.op = CMDQ_CODE_MASK;
|
|
inst.mask = ~mask;
|
|
err = cmdq_pkt_append_command(pkt, inst);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
offset = offset | CMDQ_POLL_ENABLE_MASK;
|
|
err = cmdq_pkt_poll(pkt, subsys, offset, value);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_poll_mask);
|
|
|
|
int cmdq_pkt_assign(struct cmdq_pkt *pkt, u16 reg_idx, u32 value)
|
|
{
|
|
struct cmdq_instruction inst = {};
|
|
|
|
inst.op = CMDQ_CODE_LOGIC;
|
|
inst.dst_t = CMDQ_REG_TYPE;
|
|
inst.reg_dst = reg_idx;
|
|
inst.value = value;
|
|
return cmdq_pkt_append_command(pkt, inst);
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_assign);
|
|
|
|
int cmdq_pkt_jump(struct cmdq_pkt *pkt, dma_addr_t addr)
|
|
{
|
|
struct cmdq_instruction inst = {};
|
|
|
|
inst.op = CMDQ_CODE_JUMP;
|
|
inst.offset = CMDQ_JUMP_RELATIVE;
|
|
inst.value = addr >>
|
|
cmdq_get_shift_pa(((struct cmdq_client *)pkt->cl)->chan);
|
|
return cmdq_pkt_append_command(pkt, inst);
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_jump);
|
|
|
|
int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
|
|
{
|
|
struct cmdq_instruction inst = { {0} };
|
|
int err;
|
|
|
|
/* insert EOC and generate IRQ for each command iteration */
|
|
inst.op = CMDQ_CODE_EOC;
|
|
inst.value = CMDQ_EOC_IRQ_EN;
|
|
err = cmdq_pkt_append_command(pkt, inst);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
/* JUMP to end */
|
|
inst.op = CMDQ_CODE_JUMP;
|
|
inst.value = CMDQ_JUMP_PASS >>
|
|
cmdq_get_shift_pa(((struct cmdq_client *)pkt->cl)->chan);
|
|
err = cmdq_pkt_append_command(pkt, inst);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_finalize);
|
|
|
|
int cmdq_pkt_flush_async(struct cmdq_pkt *pkt)
|
|
{
|
|
int err;
|
|
struct cmdq_client *client = (struct cmdq_client *)pkt->cl;
|
|
|
|
err = mbox_send_message(client->chan, pkt);
|
|
if (err < 0)
|
|
return err;
|
|
/* We can send next packet immediately, so just call txdone. */
|
|
mbox_client_txdone(client->chan, 0);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(cmdq_pkt_flush_async);
|
|
|
|
MODULE_LICENSE("GPL v2");
|