| Message ID | 20231109054526.27270-4-lihuisong@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | soc: hisilicon: kunpeng_hccs: Support the platform with PCC type3 and interrupt ack | expand |
On Thu, 9 Nov 2023 13:45:26 +0800 Huisong Li <lihuisong@huawei.com> wrote: > Support the platform with PCC type3 and interrupt ack. Probably mention this is version 2 as that's what you call it in the code. > > Signed-off-by: Huisong Li <lihuisong@huawei.com> Hi. Main comment in here is that it is almost always better to use a version specific structure with callbacks / data etc rather than have instances of if (version1) do_x; else if (version2) do_y; It ends up pulling all the differences into one place + allows a great deal more flexibility. See inline for details. Otherwise looks fine to me Jonathan > --- > drivers/soc/hisilicon/kunpeng_hccs.c | 137 +++++++++++++++++++++------ > drivers/soc/hisilicon/kunpeng_hccs.h | 2 + > 2 files changed, 110 insertions(+), 29 deletions(-) > > diff --git a/drivers/soc/hisilicon/kunpeng_hccs.c b/drivers/soc/hisilicon/kunpeng_hccs.c > index fd3ca0eb8175..96cdac7be244 100644 > --- a/drivers/soc/hisilicon/kunpeng_hccs.c > +++ b/drivers/soc/hisilicon/kunpeng_hccs.c > @@ -38,6 +38,11 @@ ... > > +static int hccs_get_device_version(struct hccs_dev *hdev) > +{ > + const struct acpi_device_id *acpi_id; > + > + acpi_id = acpi_match_device(hdev->dev->driver->acpi_match_table, > + hdev->dev); Why not just have hdev->dev_ver = (u8)acpi_device_get_match_data(&hdev->dev); inline where this is called? You probably don't even need the error check as you can't get here without an appropriate match as the driver would never be matched. > + if (!acpi_id) { > + dev_err(hdev->dev, "get device version failed."); > + return -EINVAL; > + } > + > + hdev->dev_ver = (u8)acpi_id->driver_data; > + return 0; > +} > + ... > static void hccs_unregister_pcc_channel(struct hccs_dev *hdev) > { > struct hccs_mbox_client_info *cl_info = &hdev->cl_info; > @@ -131,6 +159,11 @@ static int hccs_register_pcc_channel(struct hccs_dev *hdev) > cl->tx_block = false; > cl->knows_txdone = true; > cl->tx_done = hccs_chan_tx_done; > + if (hdev->dev_ver == HCCS_HW_DEVICE_V2) { I'd prefer to see this done as data. That is, instead of having an enum used in the ACPI match data, have a pointer to a struct with the callback. Then this will become something like hcc_info = acpi_device_get_match_data(hdev); cl->rx_callback = hcc_info->rx_callback; init_completion(&cl_info->done); Initializing the completion is harmless if it's not used, so just do it unconditionally. > + cl->rx_callback = hccs_pcc_rx_callback; > + init_completion(&cl_info->done); > + } > + > pcc_chan = pcc_mbox_request_channel(cl, hdev->chan_id); > if (IS_ERR(pcc_chan)) { > dev_err(dev, "PPC channel request failed.\n"); > @@ -147,10 +180,16 @@ static int hccs_register_pcc_channel(struct hccs_dev *hdev) > */ > cl_info->deadline_us = > HCCS_PCC_CMD_WAIT_RETRIES_NUM * pcc_chan->latency; > - if (cl_info->mbox_chan->mbox->txdone_irq) { > + if (hdev->dev_ver == HCCS_HW_DEVICE_V1 && > + cl_info->mbox_chan->mbox->txdone_irq) { Also data in hcc_info would be better than version number based code flow. if (hcc_info->has_txdone_irq && cl_info->mbox_chan->mbox->rx_done_irq) { .... } else if (!hcc_info->has_txdone_irq && !cl_info->mbox_chan->mbox->tx_done_irq) { ... } > dev_err(dev, "PCC IRQ in PCCT is enabled.\n"); > rc = -EINVAL; > goto err_mbx_channel_free; > + } else if (hdev->dev_ver == HCCS_HW_DEVICE_V2 && > + !cl_info->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) { > @@ -175,49 +214,81 @@ static int hccs_register_pcc_channel(struct hccs_dev *hdev) > static int hccs_check_chan_cmd_complete(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; > + struct acpi_pcct_shared_memory __iomem *comm_base; > + int ret = 0; > u16 status; > - int ret; > > /* > * Poll PCC status register every 3us(delay_us) for maximum of > * deadline_us(timeout_us) until PCC command complete bit is set(cond) > */ > - ret = readw_poll_timeout(&comm_base->status, status, > - status & PCC_STATUS_CMD_COMPLETE, > - HCCS_POLL_STATUS_TIME_INTERVAL_US, > - cl_info->deadline_us); > - if (unlikely(ret)) > - dev_err(hdev->dev, "poll PCC status failed, ret = %d.\n", ret); > + if (hdev->dev_ver == HCCS_HW_DEVICE_V1) { As above. I'd prefer to see this as a call back in an info structure rather than code here. > + comm_base = cl_info->pcc_comm_addr; > + ret = readw_poll_timeout(&comm_base->status, status, > + status & PCC_STATUS_CMD_COMPLETE, > + HCCS_POLL_STATUS_TIME_INTERVAL_US, > + cl_info->deadline_us); > + if (unlikely(ret)) > + dev_err(hdev->dev, "poll PCC status failed, ret = %d.\n", ret); > + } else { > + if (!wait_for_completion_timeout(&cl_info->done, > + usecs_to_jiffies(cl_info->deadline_us))) { > + dev_err(hdev->dev, "PCC command executed timeout!\n"); > + ret = -ETIMEDOUT; > + } > + } > > return ret; > } > > +static void hccs_fill_pcc_shared_mem_region(struct hccs_dev *hdev, u8 cmd, > + struct hccs_desc *desc, > + void __iomem *comm_space, > + u16 space_size) > +{ > + struct hccs_mbox_client_info *cl_info = &hdev->cl_info; > + struct acpi_pcct_ext_pcc_shared_memory tmp1 = {0}; > + struct acpi_pcct_shared_memory tmp2 = {0}; > + > + if (hdev->dev_ver == HCCS_HW_DEVICE_V1) { 1) tmp1 and temp2 are local to the two forks of this statement so pull them down here. 2) Use c99 style struct init to make this cleaner. struct acpi_pcct_shared_memory = { .signature = x, .command = cmd, }; I'd also like this to be a callback in the version specific info structure rather than done as an if / else here that really doesn't extend well if we get a lot more versions doing it differently. > + tmp2.signature = PCC_SIGNATURE | hdev->chan_id; > + tmp2.command = cmd; > + tmp2.status = 0; > + memcpy_toio(cl_info->pcc_comm_addr, (void *)&tmp2, > + sizeof(struct acpi_pcct_shared_memory)); > + } else { > + tmp1.signature = PCC_SIGNATURE | hdev->chan_id; > + tmp1.command = cmd; > + tmp1.flags = PCC_CMD_COMPLETION_NOTIFY; > + tmp1.length = HCCS_PCC_SHARE_MEM_BYTES; > + memcpy_toio(cl_info->pcc_comm_addr, (void *)&tmp1, > + sizeof(struct acpi_pcct_ext_pcc_shared_memory)); > + } > + > + /* Copy the message to the PCC comm space */ > + memcpy_toio(comm_space, (void *)desc, space_size); > +} ... > @@ -1214,6 +1288,10 @@ static int hccs_probe(struct platform_device *pdev) > hdev->dev = &pdev->dev; > platform_set_drvdata(pdev, hdev); > > + rc = hccs_get_device_version(hdev); > + if (rc) > + return rc; > + > mutex_init(&hdev->lock); > rc = hccs_get_pcc_chan_id(hdev); > if (rc) > @@ -1251,7 +1329,8 @@ static void hccs_remove(struct platform_device *pdev) > } > > static const struct acpi_device_id hccs_acpi_match[] = { > - { "HISI04B1"}, > + { "HISI04B1", HCCS_HW_DEVICE_V1}, > + { "HISI04B2", HCCS_HW_DEVICE_V2}, > { ""}, Side comment, but {} So no content (rely on c initializing it to be zero filled anyway and no comma as we don't want anything after this point. > }; > MODULE_DEVICE_TABLE(acpi, hccs_acpi_match); > diff --git a/drivers/soc/hisilicon/kunpeng_hccs.h b/drivers/soc/hisilicon/kunpeng_hccs.h > index 6012d2776028..bbb1aada0c6c 100644 > --- a/drivers/soc/hisilicon/kunpeng_hccs.h > +++ b/drivers/soc/hisilicon/kunpeng_hccs.h > @@ -51,12 +51,14 @@ struct hccs_mbox_client_info { > struct pcc_mbox_chan *pcc_chan; > u64 deadline_us; > void __iomem *pcc_comm_addr; > + struct completion done; > }; > > struct hccs_dev { > struct device *dev; > struct acpi_device *acpi_dev; > u64 caps; > + u8 dev_ver; See above, but I'd rather see const struct hcc_verspecific_info *info; here that encodes the differences as callbacks and data and rather than code. > u8 chip_num; > struct hccs_chip_info *chips; > u8 chan_id;
在 2023/11/28 23:44, Jonathan Cameron 写道: > On Thu, 9 Nov 2023 13:45:26 +0800 > Huisong Li <lihuisong@huawei.com> wrote: > >> Support the platform with PCC type3 and interrupt ack. > Probably mention this is version 2 as that's what you call it > in the code. >> Signed-off-by: Huisong Li <lihuisong@huawei.com> > Hi. > > Main comment in here is that it is almost always better to use > a version specific structure with callbacks / data etc rather than > have instances of if (version1) do_x; else if (version2) do_y; > > It ends up pulling all the differences into one place + allows a > great deal more flexibility. See inline for details. Hi Jonathan, Thanks for reviewing this patch. It is a good idea to use a version specific structure as driver data. will be fixed in next version. Please take a look at it later.
diff --git a/drivers/soc/hisilicon/kunpeng_hccs.c b/drivers/soc/hisilicon/kunpeng_hccs.c index fd3ca0eb8175..96cdac7be244 100644 --- a/drivers/soc/hisilicon/kunpeng_hccs.c +++ b/drivers/soc/hisilicon/kunpeng_hccs.c @@ -38,6 +38,11 @@ #define HCCS_PCC_CMD_WAIT_RETRIES_NUM 500ULL #define HCCS_POLL_STATUS_TIME_INTERVAL_US 3 +enum hccs_hw_device_version { + HCCS_HW_DEVICE_V1 = 0, + HCCS_HW_DEVICE_V2 = 1, +}; + static struct hccs_port_info *kobj_to_port_info(struct kobject *k) { return container_of(k, struct hccs_port_info, kobj); @@ -100,6 +105,21 @@ static int hccs_get_pcc_chan_id(struct hccs_dev *hdev) return 0; } +static int hccs_get_device_version(struct hccs_dev *hdev) +{ + const struct acpi_device_id *acpi_id; + + acpi_id = acpi_match_device(hdev->dev->driver->acpi_match_table, + hdev->dev); + if (!acpi_id) { + dev_err(hdev->dev, "get device version failed."); + return -EINVAL; + } + + hdev->dev_ver = (u8)acpi_id->driver_data; + return 0; +} + static void hccs_chan_tx_done(struct mbox_client *cl, void *msg, int ret) { if (ret < 0) @@ -110,6 +130,14 @@ static void hccs_chan_tx_done(struct mbox_client *cl, void *msg, int ret) *(u8 *)msg, ret); } +static void hccs_pcc_rx_callback(struct mbox_client *cl, void *m) +{ + struct hccs_mbox_client_info *cl_info = + container_of(cl, struct hccs_mbox_client_info, client); + + complete(&cl_info->done); +} + static void hccs_unregister_pcc_channel(struct hccs_dev *hdev) { struct hccs_mbox_client_info *cl_info = &hdev->cl_info; @@ -131,6 +159,11 @@ static int hccs_register_pcc_channel(struct hccs_dev *hdev) cl->tx_block = false; cl->knows_txdone = true; cl->tx_done = hccs_chan_tx_done; + if (hdev->dev_ver == HCCS_HW_DEVICE_V2) { + cl->rx_callback = hccs_pcc_rx_callback; + init_completion(&cl_info->done); + } + pcc_chan = pcc_mbox_request_channel(cl, hdev->chan_id); if (IS_ERR(pcc_chan)) { dev_err(dev, "PPC channel request failed.\n"); @@ -147,10 +180,16 @@ static int hccs_register_pcc_channel(struct hccs_dev *hdev) */ cl_info->deadline_us = HCCS_PCC_CMD_WAIT_RETRIES_NUM * pcc_chan->latency; - if (cl_info->mbox_chan->mbox->txdone_irq) { + if (hdev->dev_ver == HCCS_HW_DEVICE_V1 && + cl_info->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->dev_ver == HCCS_HW_DEVICE_V2 && + !cl_info->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) { @@ -175,49 +214,81 @@ static int hccs_register_pcc_channel(struct hccs_dev *hdev) static int hccs_check_chan_cmd_complete(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; + struct acpi_pcct_shared_memory __iomem *comm_base; + int ret = 0; u16 status; - int ret; /* * Poll PCC status register every 3us(delay_us) for maximum of * deadline_us(timeout_us) until PCC command complete bit is set(cond) */ - ret = readw_poll_timeout(&comm_base->status, status, - status & PCC_STATUS_CMD_COMPLETE, - HCCS_POLL_STATUS_TIME_INTERVAL_US, - cl_info->deadline_us); - if (unlikely(ret)) - dev_err(hdev->dev, "poll PCC status failed, ret = %d.\n", ret); + if (hdev->dev_ver == HCCS_HW_DEVICE_V1) { + comm_base = cl_info->pcc_comm_addr; + ret = readw_poll_timeout(&comm_base->status, status, + status & PCC_STATUS_CMD_COMPLETE, + HCCS_POLL_STATUS_TIME_INTERVAL_US, + cl_info->deadline_us); + if (unlikely(ret)) + dev_err(hdev->dev, "poll PCC status failed, ret = %d.\n", ret); + } else { + if (!wait_for_completion_timeout(&cl_info->done, + usecs_to_jiffies(cl_info->deadline_us))) { + dev_err(hdev->dev, "PCC command executed timeout!\n"); + ret = -ETIMEDOUT; + } + } return ret; } +static void hccs_fill_pcc_shared_mem_region(struct hccs_dev *hdev, u8 cmd, + struct hccs_desc *desc, + void __iomem *comm_space, + u16 space_size) +{ + struct hccs_mbox_client_info *cl_info = &hdev->cl_info; + struct acpi_pcct_ext_pcc_shared_memory tmp1 = {0}; + struct acpi_pcct_shared_memory tmp2 = {0}; + + if (hdev->dev_ver == HCCS_HW_DEVICE_V1) { + tmp2.signature = PCC_SIGNATURE | hdev->chan_id; + tmp2.command = cmd; + tmp2.status = 0; + memcpy_toio(cl_info->pcc_comm_addr, (void *)&tmp2, + sizeof(struct acpi_pcct_shared_memory)); + } else { + tmp1.signature = PCC_SIGNATURE | hdev->chan_id; + tmp1.command = cmd; + tmp1.flags = PCC_CMD_COMPLETION_NOTIFY; + tmp1.length = HCCS_PCC_SHARE_MEM_BYTES; + memcpy_toio(cl_info->pcc_comm_addr, (void *)&tmp1, + sizeof(struct acpi_pcct_ext_pcc_shared_memory)); + } + + /* Copy the message to the PCC comm space */ + memcpy_toio(comm_space, (void *)desc, space_size); +} + static int hccs_pcc_cmd_send(struct hccs_dev *hdev, u8 cmd, struct hccs_desc *desc) { struct hccs_mbox_client_info *cl_info = &hdev->cl_info; - void __iomem *comm_space = cl_info->pcc_comm_addr + - sizeof(struct acpi_pcct_shared_memory); struct hccs_fw_inner_head *fw_inner_head; - struct acpi_pcct_shared_memory tmp = {0}; - u16 comm_space_size; + void __iomem *comm_space; + u16 shared_mem_size; + u16 space_size; int ret; - /* Write signature for this subspace */ - tmp.signature = PCC_SIGNATURE | hdev->chan_id; - /* Write to the shared command region */ - tmp.command = cmd; - /* Clear cmd complete bit */ - tmp.status = 0; - memcpy_toio(cl_info->pcc_comm_addr, (void *)&tmp, - sizeof(struct acpi_pcct_shared_memory)); + shared_mem_size = hdev->dev_ver == HCCS_HW_DEVICE_V1 ? + sizeof(struct acpi_pcct_shared_memory) : + sizeof(struct acpi_pcct_ext_pcc_shared_memory); + comm_space = cl_info->pcc_comm_addr + shared_mem_size; + space_size = HCCS_PCC_SHARE_MEM_BYTES - shared_mem_size; - /* Copy the message to the PCC comm space */ - comm_space_size = HCCS_PCC_SHARE_MEM_BYTES - - sizeof(struct acpi_pcct_shared_memory); - memcpy_toio(comm_space, (void *)desc, comm_space_size); + hccs_fill_pcc_shared_mem_region(hdev, cmd, desc, + comm_space, space_size); + if (cl_info->mbox_chan->mbox->txdone_irq) + reinit_completion(&cl_info->done); /* Ring doorbell */ ret = mbox_send_message(cl_info->mbox_chan, &cmd); @@ -233,7 +304,7 @@ static int hccs_pcc_cmd_send(struct hccs_dev *hdev, u8 cmd, goto end; /* Copy response data */ - memcpy_fromio((void *)desc, comm_space, comm_space_size); + memcpy_fromio((void *)desc, comm_space, space_size); fw_inner_head = &desc->rsp.fw_inner_head; if (fw_inner_head->retStatus) { dev_err(hdev->dev, "Execute PCC command failed, error code = %u.\n", @@ -242,7 +313,10 @@ static int hccs_pcc_cmd_send(struct hccs_dev *hdev, u8 cmd, } end: - mbox_client_txdone(cl_info->mbox_chan, ret); + if (cl_info->mbox_chan->mbox->txdone_irq) + mbox_chan_txdone(cl_info->mbox_chan, ret); + else + mbox_client_txdone(cl_info->mbox_chan, ret); return ret; } @@ -1214,6 +1288,10 @@ static int hccs_probe(struct platform_device *pdev) hdev->dev = &pdev->dev; platform_set_drvdata(pdev, hdev); + rc = hccs_get_device_version(hdev); + if (rc) + return rc; + mutex_init(&hdev->lock); rc = hccs_get_pcc_chan_id(hdev); if (rc) @@ -1251,7 +1329,8 @@ static void hccs_remove(struct platform_device *pdev) } static const struct acpi_device_id hccs_acpi_match[] = { - { "HISI04B1"}, + { "HISI04B1", HCCS_HW_DEVICE_V1}, + { "HISI04B2", HCCS_HW_DEVICE_V2}, { ""}, }; MODULE_DEVICE_TABLE(acpi, hccs_acpi_match); diff --git a/drivers/soc/hisilicon/kunpeng_hccs.h b/drivers/soc/hisilicon/kunpeng_hccs.h index 6012d2776028..bbb1aada0c6c 100644 --- a/drivers/soc/hisilicon/kunpeng_hccs.h +++ b/drivers/soc/hisilicon/kunpeng_hccs.h @@ -51,12 +51,14 @@ struct hccs_mbox_client_info { struct pcc_mbox_chan *pcc_chan; u64 deadline_us; void __iomem *pcc_comm_addr; + struct completion done; }; struct hccs_dev { struct device *dev; struct acpi_device *acpi_dev; u64 caps; + u8 dev_ver; u8 chip_num; struct hccs_chip_info *chips; u8 chan_id;
Support the platform with PCC type3 and interrupt ack. Signed-off-by: Huisong Li <lihuisong@huawei.com> --- drivers/soc/hisilicon/kunpeng_hccs.c | 137 +++++++++++++++++++++------ drivers/soc/hisilicon/kunpeng_hccs.h | 2 + 2 files changed, 110 insertions(+), 29 deletions(-)