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Merge branch 'v5.5-next/cmdq-stable' into v5.5-next/soc

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This commit is contained in:
Matthias Brugger 2020-01-10 11:00:45 +01:00
commit 9c26abeb86
3 changed files with 185 additions and 26 deletions
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147
drivers/soc/mediatek/mtk-cmdq-helper.c
View File

@ -9,10 +9,52 @@
#include <linux/mailbox_controller.h>
#include <linux/soc/mediatek/mtk-cmdq.h>
#define CMDQ_ARG_A_WRITE_MASK 0xffff
#define CMDQ_WRITE_ENABLE_MASK BIT(0)
#define CMDQ_POLL_ENABLE_MASK BIT(0)
#define CMDQ_EOC_IRQ_EN BIT(0)
struct cmdq_instruction {
union {
u32 value;
u32 mask;
};
union {
u16 offset;
u16 event;
};
u8 subsys;
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);
static void cmdq_client_timeout(struct timer_list *t)
{
struct cmdq_client *client = from_timer(client, t, timer);
@ -108,10 +150,10 @@ void cmdq_pkt_destroy(struct cmdq_pkt *pkt)
}
EXPORT_SYMBOL(cmdq_pkt_destroy);
static int cmdq_pkt_append_command(struct cmdq_pkt *pkt, enum cmdq_code code,
u32 arg_a, u32 arg_b)
static int cmdq_pkt_append_command(struct cmdq_pkt *pkt,
struct cmdq_instruction inst)
{
u64 *cmd_ptr;
struct cmdq_instruction *cmd_ptr;
if (unlikely(pkt->cmd_buf_size + CMDQ_INST_SIZE > pkt->buf_size)) {
/*
@ -127,8 +169,9 @@ static int cmdq_pkt_append_command(struct cmdq_pkt *pkt, enum cmdq_code code,
__func__, (u32)pkt->buf_size);
return -ENOMEM;
}
cmd_ptr = pkt->va_base + pkt->cmd_buf_size;
(*cmd_ptr) = (u64)((code << CMDQ_OP_CODE_SHIFT) | arg_a) << 32 | arg_b;
*cmd_ptr = inst;
pkt->cmd_buf_size += CMDQ_INST_SIZE;
return 0;
@ -136,24 +179,34 @@ static int cmdq_pkt_append_command(struct cmdq_pkt *pkt, enum cmdq_code code,
int cmdq_pkt_write(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value)
{
u32 arg_a = (offset & CMDQ_ARG_A_WRITE_MASK) |
(subsys << CMDQ_SUBSYS_SHIFT);
struct cmdq_instruction inst;
return cmdq_pkt_append_command(pkt, CMDQ_CODE_WRITE, arg_a, value);
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)
{
u32 offset_mask = offset;
int err = 0;
struct cmdq_instruction inst = { {0} };
u16 offset_mask = offset;
int err;
if (mask != 0xffffffff) {
err = cmdq_pkt_append_command(pkt, CMDQ_CODE_MASK, 0, ~mask);
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);
err = cmdq_pkt_write(pkt, subsys, offset_mask, value);
return err;
}
@ -161,43 +214,85 @@ EXPORT_SYMBOL(cmdq_pkt_write_mask);
int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
{
u32 arg_b;
struct cmdq_instruction inst = { {0} };
if (event >= CMDQ_MAX_EVENT)
return -EINVAL;
/*
* WFE arg_b
* bit 0-11: wait value
* bit 15: 1 - wait, 0 - no wait
* bit 16-27: update value
* bit 31: 1 - update, 0 - no update
*/
arg_b = CMDQ_WFE_UPDATE | CMDQ_WFE_WAIT | CMDQ_WFE_WAIT_VALUE;
inst.op = CMDQ_CODE_WFE;
inst.value = CMDQ_WFE_OPTION;
inst.event = event;
return cmdq_pkt_append_command(pkt, CMDQ_CODE_WFE, event, arg_b);
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;
return cmdq_pkt_append_command(pkt, CMDQ_CODE_WFE, event,
CMDQ_WFE_UPDATE);
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_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);
static int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
{
struct cmdq_instruction inst = { {0} };
int err;
/* insert EOC and generate IRQ for each command iteration */
err = cmdq_pkt_append_command(pkt, CMDQ_CODE_EOC, 0, CMDQ_EOC_IRQ_EN);
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 */
err |= cmdq_pkt_append_command(pkt, CMDQ_CODE_JUMP, 0, CMDQ_JUMP_PASS);
inst.op = CMDQ_CODE_JUMP;
inst.value = CMDQ_JUMP_PASS;
err = cmdq_pkt_append_command(pkt, inst);
return err;
}

11
include/linux/mailbox/mtk-cmdq-mailbox.h
View File

@ -20,6 +20,16 @@
#define CMDQ_WFE_WAIT BIT(15)
#define CMDQ_WFE_WAIT_VALUE 0x1
/*
* WFE arg_b
* bit 0-11: wait value
* bit 15: 1 - wait, 0 - no wait
* bit 16-27: update value
* bit 31: 1 - update, 0 - no update
*/
#define CMDQ_WFE_OPTION (CMDQ_WFE_UPDATE | CMDQ_WFE_WAIT | \
CMDQ_WFE_WAIT_VALUE)
/** cmdq event maximum */
#define CMDQ_MAX_EVENT 0x3ff
@ -45,6 +55,7 @@
enum cmdq_code {
CMDQ_CODE_MASK = 0x02,
CMDQ_CODE_WRITE = 0x04,
CMDQ_CODE_POLL = 0x08,
CMDQ_CODE_JUMP = 0x10,
CMDQ_CODE_WFE = 0x20,
CMDQ_CODE_EOC = 0x40,

53
include/linux/soc/mediatek/mtk-cmdq.h
View File

@ -15,6 +15,12 @@
struct cmdq_pkt;
struct cmdq_client_reg {
u8 subsys;
u16 offset;
u16 size;
};
struct cmdq_client {
spinlock_t lock;
u32 pkt_cnt;
@ -24,6 +30,21 @@ struct cmdq_client {
u32 timeout_ms; /* in unit of microsecond */
};
/**
* cmdq_dev_get_client_reg() - parse cmdq client reg from the device
* node of CMDQ client
* @dev: device of CMDQ mailbox client
* @client_reg: CMDQ client reg pointer
* @idx: the index of desired reg
*
* Return: 0 for success; else the error code is returned
*
* Help CMDQ client parsing the cmdq client reg
* from the device node of CMDQ client.
*/
int cmdq_dev_get_client_reg(struct device *dev,
struct cmdq_client_reg *client_reg, int idx);
/**
* cmdq_mbox_create() - create CMDQ mailbox client and channel
* @dev: device of CMDQ mailbox client
@ -99,6 +120,38 @@ int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event);
*/
int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event);
/**
* cmdq_pkt_poll() - Append polling command to the CMDQ packet, ask GCE to
* execute an instruction that wait for a specified
* hardware register to check for the value w/o mask.
* All GCE hardware threads will be blocked by this
* instruction.
* @pkt: the CMDQ packet
* @subsys: the CMDQ sub system code
* @offset: register offset from CMDQ sub system
* @value: the specified target register value
*
* Return: 0 for success; else the error code is returned
*/
int cmdq_pkt_poll(struct cmdq_pkt *pkt, u8 subsys,
u16 offset, u32 value);
/**
* cmdq_pkt_poll_mask() - Append polling command to the CMDQ packet, ask GCE to
* execute an instruction that wait for a specified
* hardware register to check for the value w/ mask.
* All GCE hardware threads will be blocked by this
* instruction.
* @pkt: the CMDQ packet
* @subsys: the CMDQ sub system code
* @offset: register offset from CMDQ sub system
* @value: the specified target register value
* @mask: the specified target register mask
*
* Return: 0 for success; else the error code is returned
*/
int cmdq_pkt_poll_mask(struct cmdq_pkt *pkt, u8 subsys,
u16 offset, u32 value, u32 mask);
/**
* cmdq_pkt_flush_async() - trigger CMDQ to asynchronously execute the CMDQ
* packet and call back at the end of done packet