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HiSilicon driver updates for v6.16

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- Simplify PCC shared memory region handling in HCCS driver
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Merge tag 'hisi-drivers-for-6.16' of https://github.com/hisilicon/linux-hisi into soc/drivers

HiSilicon driver updates for v6.16

- Simplify PCC shared memory region handling in HCCS driver

* tag 'hisi-drivers-for-6.16' of https://github.com/hisilicon/linux-hisi:
  soc: hisilicon: kunpeng_hccs: Simplify PCC shared memory region handling

Link: https://lore.kernel.org/r/681D9FC4.6080508@hisilicon.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2025-05-09 23:12:37 +02:00
commit fd11231a7d
2 changed files with 15 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
drivers/soc/hisilicon/kunpeng_hccs.c
View File

@ -167,10 +167,6 @@ static void hccs_pcc_rx_callback(struct mbox_client *cl, void *mssg)
static void hccs_unregister_pcc_channel(struct hccs_dev *hdev)
{
struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
if (cl_info->pcc_comm_addr)
iounmap(cl_info->pcc_comm_addr);
pcc_mbox_free_channel(hdev->cl_info.pcc_chan);
}
@ -179,6 +175,7 @@ static int hccs_register_pcc_channel(struct hccs_dev *hdev)
struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
struct mbox_client *cl = &cl_info->client;
struct pcc_mbox_chan *pcc_chan;
struct mbox_chan *mbox_chan;
struct device *dev = hdev->dev;
int rc;
@ -196,7 +193,7 @@ static int hccs_register_pcc_channel(struct hccs_dev *hdev)
goto out;
}
cl_info->pcc_chan = pcc_chan;
cl_info->mbox_chan = pcc_chan->mchan;
mbox_chan = pcc_chan->mchan;
/*
* pcc_chan->latency is just a nominal value. In reality the remote
@ -206,34 +203,24 @@ static int hccs_register_pcc_channel(struct hccs_dev *hdev)
cl_info->deadline_us =
HCCS_PCC_CMD_WAIT_RETRIES_NUM * pcc_chan->latency;
if (!hdev->verspec_data->has_txdone_irq &&
cl_info->mbox_chan->mbox->txdone_irq) {
mbox_chan->mbox->txdone_irq) {
dev_err(dev, "PCC IRQ in PCCT is enabled.\n");
rc = -EINVAL;
goto err_mbx_channel_free;
} else if (hdev->verspec_data->has_txdone_irq &&
!cl_info->mbox_chan->mbox->txdone_irq) {
!mbox_chan->mbox->txdone_irq) {
dev_err(dev, "PCC IRQ in PCCT isn't supported.\n");
rc = -EINVAL;
goto err_mbx_channel_free;
}
if (!pcc_chan->shmem_base_addr ||
pcc_chan->shmem_size != HCCS_PCC_SHARE_MEM_BYTES) {
dev_err(dev, "The base address or size (%llu) of PCC communication region is invalid.\n",
pcc_chan->shmem_size);
if (pcc_chan->shmem_size != HCCS_PCC_SHARE_MEM_BYTES) {
dev_err(dev, "Base size (%llu) of PCC communication region must be %d bytes.\n",
pcc_chan->shmem_size, HCCS_PCC_SHARE_MEM_BYTES);
rc = -EINVAL;
goto err_mbx_channel_free;
}
cl_info->pcc_comm_addr = ioremap(pcc_chan->shmem_base_addr,
pcc_chan->shmem_size);
if (!cl_info->pcc_comm_addr) {
dev_err(dev, "Failed to ioremap PCC communication region for channel-%u.\n",
hdev->chan_id);
rc = -ENOMEM;
goto err_mbx_channel_free;
}
return 0;
err_mbx_channel_free:
@ -246,7 +233,7 @@ static int hccs_wait_cmd_complete_by_poll(struct hccs_dev *hdev)
{
struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
struct acpi_pcct_shared_memory __iomem *comm_base =
cl_info->pcc_comm_addr;
cl_info->pcc_chan->shmem;
u16 status;
int ret;
@ -289,7 +276,7 @@ static inline void hccs_fill_pcc_shared_mem_region(struct hccs_dev *hdev,
.status = 0,
};
memcpy_toio(hdev->cl_info.pcc_comm_addr, (void *)&tmp,
memcpy_toio(hdev->cl_info.pcc_chan->shmem, (void *)&tmp,
sizeof(struct acpi_pcct_shared_memory));
/* Copy the message to the PCC comm space */
@ -309,7 +296,7 @@ static inline void hccs_fill_ext_pcc_shared_mem_region(struct hccs_dev *hdev,
.command = cmd,
};
memcpy_toio(hdev->cl_info.pcc_comm_addr, (void *)&tmp,
memcpy_toio(hdev->cl_info.pcc_chan->shmem, (void *)&tmp,
sizeof(struct acpi_pcct_ext_pcc_shared_memory));
/* Copy the message to the PCC comm space */
@ -321,12 +308,13 @@ static int hccs_pcc_cmd_send(struct hccs_dev *hdev, u8 cmd,
{
const struct hccs_verspecific_data *verspec_data = hdev->verspec_data;
struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
struct mbox_chan *mbox_chan = cl_info->pcc_chan->mchan;
struct hccs_fw_inner_head *fw_inner_head;
void __iomem *comm_space;
u16 space_size;
int ret;
comm_space = cl_info->pcc_comm_addr + verspec_data->shared_mem_size;
comm_space = cl_info->pcc_chan->shmem + verspec_data->shared_mem_size;
space_size = HCCS_PCC_SHARE_MEM_BYTES - verspec_data->shared_mem_size;
verspec_data->fill_pcc_shared_mem(hdev, cmd, desc,
comm_space, space_size);
@ -334,7 +322,7 @@ static int hccs_pcc_cmd_send(struct hccs_dev *hdev, u8 cmd,
reinit_completion(&cl_info->done);
/* Ring doorbell */
ret = mbox_send_message(cl_info->mbox_chan, &cmd);
ret = mbox_send_message(mbox_chan, &cmd);
if (ret < 0) {
dev_err(hdev->dev, "Send PCC mbox message failed, ret = %d.\n",
ret);
@ -356,9 +344,9 @@ static int hccs_pcc_cmd_send(struct hccs_dev *hdev, u8 cmd,
end:
if (verspec_data->has_txdone_irq)
mbox_chan_txdone(cl_info->mbox_chan, ret);
mbox_chan_txdone(mbox_chan, ret);
else
mbox_client_txdone(cl_info->mbox_chan, ret);
mbox_client_txdone(mbox_chan, ret);
return ret;
}

2
drivers/soc/hisilicon/kunpeng_hccs.h
View File

@ -60,10 +60,8 @@ struct hccs_chip_info {
struct hccs_mbox_client_info {
struct mbox_client client;
struct mbox_chan *mbox_chan;
struct pcc_mbox_chan *pcc_chan;
u64 deadline_us;
void __iomem *pcc_comm_addr;
struct completion done;
};