Re: [PATCH 2/2] remoteproc: mediatek: Support MT8188 SCP core 1
From: AngeloGioacchino Del Regno
Date: Thu Apr 11 2024 - 03:33:27 EST
Il 11/04/24 05:37, olivia.wen ha scritto:
To Support MT8188 SCP core 1 for ISP driver.
The SCP on different chips will require different code sizes
and IPI buffer sizes based on varying requirements.
Signed-off-by: olivia.wen <olivia.wen@xxxxxxxxxxxx>
---
drivers/remoteproc/mtk_common.h | 5 +--
drivers/remoteproc/mtk_scp.c | 62 +++++++++++++++++++++++++++++++-------
drivers/remoteproc/mtk_scp_ipi.c | 9 ++++--
include/linux/remoteproc/mtk_scp.h | 1 +
4 files changed, 62 insertions(+), 15 deletions(-)
diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
index 6d7736a..8f37f65 100644
--- a/drivers/remoteproc/mtk_common.h
+++ b/drivers/remoteproc/mtk_common.h
@@ -78,7 +78,6 @@
#define MT8195_L2TCM_OFFSET 0x850d0
#define SCP_FW_VER_LEN 32
-#define SCP_SHARE_BUFFER_SIZE 288
struct scp_run {
u32 signaled;
@@ -110,6 +109,8 @@ struct mtk_scp_of_data {
u32 host_to_scp_int_bit;
size_t ipi_buf_offset;
+ u32 ipi_buffer_size;
this should be `ipi_share_buf_size`
+ u32 max_code_size;
max_code_size should probably be dram_code_size or max_dram_size or dram_size.
Also, both should be size_t, not u32.
};
struct mtk_scp_of_cluster {
@@ -162,7 +163,7 @@ struct mtk_scp {
struct mtk_share_obj {
u32 id;
u32 len;
- u8 share_buf[SCP_SHARE_BUFFER_SIZE];
+ u8 *share_buf;
};
void scp_memcpy_aligned(void __iomem *dst, const void *src, unsigned int len);
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index 6751829..270718d 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -20,7 +20,6 @@
#include "mtk_common.h"
#include "remoteproc_internal.h"
-#define MAX_CODE_SIZE 0x500000
#define SECTION_NAME_IPI_BUFFER ".ipi_buffer"
/**
@@ -94,14 +93,14 @@ static void scp_ipi_handler(struct mtk_scp *scp)
{
struct mtk_share_obj __iomem *rcv_obj = scp->recv_buf;
struct scp_ipi_desc *ipi_desc = scp->ipi_desc;
- u8 tmp_data[SCP_SHARE_BUFFER_SIZE];
+ u8 *tmp_data;
scp_ipi_handler_t handler;
u32 id = readl(&rcv_obj->id);
u32 len = readl(&rcv_obj->len);
- if (len > SCP_SHARE_BUFFER_SIZE) {
+ if (len > scp->data->ipi_buffer_size) {
dev_err(scp->dev, "ipi message too long (len %d, max %d)", len,
- SCP_SHARE_BUFFER_SIZE);
+ scp->data->ipi_buffer_size);
return;
}
if (id >= SCP_IPI_MAX) {
@@ -109,6 +108,10 @@ static void scp_ipi_handler(struct mtk_scp *scp)
return;
}
+ tmp_data = kzalloc(len, GFP_KERNEL);
I think that this will be impacting on performance a bit, especially if
the scp_ipi_handler gets called frequently (and also remember that this
is in interrupt context).
For best performance, you should allocate this at probe time (in struct mtk_scp
or somewhere else), then:
len = ipi message length
memset zero the tmp_data from len to ipi_buffer_size
memcpy_fromio(....) etc
+ if (!tmp_data)
+ return;
+
scp_ipi_lock(scp, id);
handler = ipi_desc[id].handler;
if (!handler) {
@@ -123,6 +126,7 @@ static void scp_ipi_handler(struct mtk_scp *scp)
scp->ipi_id_ack[id] = true;
wake_up(&scp->ack_wq);
+ kfree(tmp_data);
There's a possible memory leak. You forgot to kfree in the NULL handler path.
}
static int scp_elf_read_ipi_buf_addr(struct mtk_scp *scp,
@@ -133,6 +137,7 @@ static int scp_ipi_init(struct mtk_scp *scp, const struct firmware *fw)
{
int ret;
size_t buf_sz, offset;
+ size_t share_buf_offset;
/* read the ipi buf addr from FW itself first */
ret = scp_elf_read_ipi_buf_addr(scp, fw, &offset);
@@ -154,10 +159,12 @@ static int scp_ipi_init(struct mtk_scp *scp, const struct firmware *fw)
scp->recv_buf = (struct mtk_share_obj __iomem *)
(scp->sram_base + offset);
+ share_buf_offset = sizeof(scp->recv_buf->id)
+ + sizeof(scp->recv_buf->len) + scp->data->ipi_buffer_size;
scp->send_buf = (struct mtk_share_obj __iomem *)
- (scp->sram_base + offset + sizeof(*scp->recv_buf));
- memset_io(scp->recv_buf, 0, sizeof(*scp->recv_buf));
- memset_io(scp->send_buf, 0, sizeof(*scp->send_buf));
+ (scp->sram_base + offset + share_buf_offset);
+ memset_io(scp->recv_buf, 0, share_buf_offset);
+ memset_io(scp->send_buf, 0, share_buf_offset);
return 0;
}
@@ -891,7 +898,7 @@ static int scp_map_memory_region(struct mtk_scp *scp)
}
/* Reserved SCP code size */
- scp->dram_size = MAX_CODE_SIZE;
+ scp->dram_size = scp->data->max_code_size;
Remove the dram_size member from struct mtk_scp and use max_code_size directly.
scp->cpu_addr = dma_alloc_coherent(scp->dev, scp->dram_size,
&scp->dma_addr, GFP_KERNEL);
if (!scp->cpu_addr)
@@ -1247,6 +1254,8 @@ static const struct mtk_scp_of_data mt8183_of_data = {
.host_to_scp_reg = MT8183_HOST_TO_SCP,
.host_to_scp_int_bit = MT8183_HOST_IPC_INT_BIT,
.ipi_buf_offset = 0x7bdb0,
+ .max_code_size = 0x500000,
+ .ipi_buffer_size = 288,
};
static const struct mtk_scp_of_data mt8186_of_data = {
@@ -1260,18 +1269,22 @@ static const struct mtk_scp_of_data mt8186_of_data = {
.host_to_scp_reg = MT8183_HOST_TO_SCP,
.host_to_scp_int_bit = MT8183_HOST_IPC_INT_BIT,
.ipi_buf_offset = 0x3bdb0,
+ .max_code_size = 0x500000,
+ .ipi_buffer_size = 288,
};
static const struct mtk_scp_of_data mt8188_of_data = {
.scp_clk_get = mt8195_scp_clk_get,
- .scp_before_load = mt8192_scp_before_load,
- .scp_irq_handler = mt8192_scp_irq_handler,
+ .scp_before_load = mt8195_scp_before_load,
+ .scp_irq_handler = mt8195_scp_irq_handler,
You should mention the reason of this change in the commit description, or better,
you should make a separate commit with a Fixes tag for this.
.scp_reset_assert = mt8192_scp_reset_assert,
.scp_reset_deassert = mt8192_scp_reset_deassert,
- .scp_stop = mt8192_scp_stop,
+ .scp_stop = mt8195_scp_stop,
.scp_da_to_va = mt8192_scp_da_to_va,
.host_to_scp_reg = MT8192_GIPC_IN_SET,
.host_to_scp_int_bit = MT8192_HOST_IPC_INT_BIT,
+ .max_code_size = 0x500000,
+ .ipi_buffer_size = 600,
};
static const struct mtk_scp_of_data mt8192_of_data = {
@@ -1284,6 +1297,8 @@ static const struct mtk_scp_of_data mt8192_of_data = {
.scp_da_to_va = mt8192_scp_da_to_va,
.host_to_scp_reg = MT8192_GIPC_IN_SET,
.host_to_scp_int_bit = MT8192_HOST_IPC_INT_BIT,
+ .max_code_size = 0x500000,
+ .ipi_buffer_size = 288,
};
static const struct mtk_scp_of_data mt8195_of_data = {
@@ -1296,6 +1311,8 @@ static const struct mtk_scp_of_data mt8195_of_data = {
.scp_da_to_va = mt8192_scp_da_to_va,
.host_to_scp_reg = MT8192_GIPC_IN_SET,
.host_to_scp_int_bit = MT8192_HOST_IPC_INT_BIT,
+ .max_code_size = 0x500000,
+ .ipi_buffer_size = 288,
};
static const struct mtk_scp_of_data mt8195_of_data_c1 = {
@@ -1308,6 +1325,22 @@ static const struct mtk_scp_of_data mt8195_of_data_c1 = {
.scp_da_to_va = mt8192_scp_da_to_va,
.host_to_scp_reg = MT8192_GIPC_IN_SET,
.host_to_scp_int_bit = MT8195_CORE1_HOST_IPC_INT_BIT,
+ .max_code_size = 0x500000,
+ .ipi_buffer_size = 288,
+};
+
+static const struct mtk_scp_of_data mt8188_of_data_c1 = {
+ .scp_clk_get = mt8195_scp_clk_get,
+ .scp_before_load = mt8195_scp_c1_before_load,
+ .scp_irq_handler = mt8195_scp_c1_irq_handler,
+ .scp_reset_assert = mt8195_scp_c1_reset_assert,
+ .scp_reset_deassert = mt8195_scp_c1_reset_deassert,
+ .scp_stop = mt8195_scp_c1_stop,
+ .scp_da_to_va = mt8192_scp_da_to_va,
+ .host_to_scp_reg = MT8192_GIPC_IN_SET,
+ .host_to_scp_int_bit = MT8195_CORE1_HOST_IPC_INT_BIT,
+ .max_code_size = 0xA00000,
+ .ipi_buffer_size = 600,
I wonder if it's more sensible to add a new struct instead,
so that you can define
static const struct mtk_scp_sizes_data mt8188_scp_sizes = {
.max_code_size = 0xA00000,
.ipi_buffer_size = 600
};
..and then reuse like
static const struct mtk_scp_of_data mt8188_of_data_c1 = {
..... stuff .....
.scp_sizes = &mt8188_scp_sizes
};
..that'd be more important for mt8192, 95 and the others as those params
would be reused many, many times.
};
static const struct mtk_scp_of_data *mt8195_of_data_cores[] = {
@@ -1316,6 +1349,12 @@ static const struct mtk_scp_of_data *mt8195_of_data_cores[] = {
NULL
};
+static const struct mtk_scp_of_data *mt8188_of_data_cores[] = {
+ &mt8188_of_data,
+ &mt8188_of_data_c1,
+ NULL
+};
+
static const struct of_device_id mtk_scp_of_match[] = {
{ .compatible = "mediatek,mt8183-scp", .data = &mt8183_of_data },
{ .compatible = "mediatek,mt8186-scp", .data = &mt8186_of_data },
@@ -1323,6 +1362,7 @@ static const struct of_device_id mtk_scp_of_match[] = {
{ .compatible = "mediatek,mt8192-scp", .data = &mt8192_of_data },
{ .compatible = "mediatek,mt8195-scp", .data = &mt8195_of_data },
{ .compatible = "mediatek,mt8195-scp-dual", .data = &mt8195_of_data_cores },
+ { .compatible = "mediatek,mt8188-scp-dual", .data = &mt8188_of_data_cores },
{},
};
MODULE_DEVICE_TABLE(of, mtk_scp_of_match);
diff --git a/drivers/remoteproc/mtk_scp_ipi.c b/drivers/remoteproc/mtk_scp_ipi.c
index cd0b601..4ef5491 100644
--- a/drivers/remoteproc/mtk_scp_ipi.c
+++ b/drivers/remoteproc/mtk_scp_ipi.c
@@ -162,10 +162,12 @@ int scp_ipi_send(struct mtk_scp *scp, u32 id, void *buf, unsigned int len,
struct mtk_share_obj __iomem *send_obj = scp->send_buf;
u32 val;
int ret;
+ size_t share_buf_offset;
+ void __iomem *share_buf_io_address;
if (WARN_ON(id <= SCP_IPI_INIT) || WARN_ON(id >= SCP_IPI_MAX) ||
WARN_ON(id == SCP_IPI_NS_SERVICE) ||
- WARN_ON(len > sizeof(send_obj->share_buf)) || WARN_ON(!buf))
+ WARN_ON(len > scp->data->ipi_buffer_size) || WARN_ON(!buf))
return -EINVAL;
ret = clk_prepare_enable(scp->clk);
@@ -184,7 +186,10 @@ int scp_ipi_send(struct mtk_scp *scp, u32 id, void *buf, unsigned int len,
goto unlock_mutex;
}
- scp_memcpy_aligned(send_obj->share_buf, buf, len);
+ share_buf_offset = offsetof(struct mtk_share_obj, share_buf);
+ share_buf_io_address = (void __iomem *)((uintptr_t)scp->send_buf + share_buf_offset);
+
+ scp_memcpy_aligned(share_buf_io_address, buf, len);
writel(len, &send_obj->len);
writel(id, &send_obj->id);
diff --git a/include/linux/remoteproc/mtk_scp.h b/include/linux/remoteproc/mtk_scp.h
index 7c2b7cc9..344ff41 100644
--- a/include/linux/remoteproc/mtk_scp.h
+++ b/include/linux/remoteproc/mtk_scp.h
@@ -43,6 +43,7 @@ enum scp_ipi_id {
SCP_IPI_CROS_HOST_CMD,
SCP_IPI_VDEC_LAT,
SCP_IPI_VDEC_CORE,
+ SCP_IPI_IMGSYS_CMD,
There's no mention of the addition of this new IPI ID in the commit description.
Please write something about it.
Cheers,
Angelo
SCP_IPI_NS_SERVICE = 0xFF,
SCP_IPI_MAX = 0x100,
};