On Wed, Jun 16, 2021 at 03:57:38PM -0700, Russ Weight wrote:
> The FPGA manager class driver data structure is being treated as a
> managed resource instead of using standard dev_release call-back
> to release the class data structure. This change removes the
> managed resource code for the freeing of the class data structure
> and combines the create() and register() functions into a single
> register() function.
>
> The devm_fpga_mgr_register() function is retained.
>
> Signed-off-by: Russ Weight <russell.h.weight@xxxxxxxxx>
> ---
> v5:
> - Rebased on top of recently accepted patches.
> - Removed compat_id from the fpga_mgr_register() parameter list
> and added it to the fpga_manager_ops structure. This also required
My reason for this change is, we could avoid further change of the
fpga_mgr_register() API if we add new input parameters later on.
> dynamically allocating the dfl-fme-ops structure in order to add
> the appropriate compat_id.
But enforcing the dynamical allocation of the parameters is not prefered
to me. How about a dedicated structure that wraps all the needed
parameters:
struct fpga_mgr_info {
const char *name;
const struct fpga_manager_ops *mops;
const struct fpga_compat_id *compat_id;
const void *priv;
};
Then We can simply define a local variable of this struct for
fpga_mgr_register().
more details inline.
> v4:
> - Added the compat_id parameter to fpga_mgr_register() and
> devm_fpga_mgr_register() to ensure that the compat_id is set before
> the device_register() call.
> v3:
> - Cleaned up comment header for fpga_mgr_register()
> - Fix error return on ida_simple_get() failure
> v2:
> - Restored devm_fpga_mgr_register() functionality, adapted for the combined
> create/register functionality.
> - All previous callers of devm_fpga_mgr_register() will continue to call
> devm_fpga_mgr_register().
> - replaced unnecessary ternary operators in return statements with standard
> if conditions.
> ---
> drivers/fpga/altera-cvp.c | 12 +--
> drivers/fpga/altera-pr-ip-core.c | 8 +-
> drivers/fpga/altera-ps-spi.c | 10 +-
> drivers/fpga/dfl-fme-mgr.c | 52 ++++++----
> drivers/fpga/dfl-fme-region.c | 2 +-
> drivers/fpga/fpga-mgr.c | 163 ++++++++-----------------------
> drivers/fpga/ice40-spi.c | 10 +-
> drivers/fpga/machxo2-spi.c | 10 +-
> drivers/fpga/socfpga-a10.c | 16 ++-
> drivers/fpga/socfpga.c | 10 +-
> drivers/fpga/stratix10-soc.c | 16 +--
> drivers/fpga/ts73xx-fpga.c | 10 +-
> drivers/fpga/xilinx-spi.c | 12 +--
> drivers/fpga/zynq-fpga.c | 16 ++-
> drivers/fpga/zynqmp-fpga.c | 10 +-
> include/linux/fpga/fpga-mgr.h | 43 ++++----
> 16 files changed, 153 insertions(+), 247 deletions(-)
>
> diff --git a/drivers/fpga/altera-cvp.c b/drivers/fpga/altera-cvp.c
> index ccf4546eff29..4ffb9da537d8 100644
> --- a/drivers/fpga/altera-cvp.c
> +++ b/drivers/fpga/altera-cvp.c
> @@ -652,19 +652,15 @@ static int altera_cvp_probe(struct pci_dev *pdev,
> snprintf(conf->mgr_name, sizeof(conf->mgr_name), "%s @%s",
> ALTERA_CVP_MGR_NAME, pci_name(pdev));
>
> - mgr = devm_fpga_mgr_create(&pdev->dev, conf->mgr_name,
> - &altera_cvp_ops, conf);
> - if (!mgr) {
> - ret = -ENOMEM;
> + mgr = fpga_mgr_register(&pdev->dev, conf->mgr_name,
> + &altera_cvp_ops, conf);
> + if (IS_ERR(mgr)) {
> + ret = PTR_ERR(mgr);
> goto err_unmap;
> }
>
> pci_set_drvdata(pdev, mgr);
>
> - ret = fpga_mgr_register(mgr);
> - if (ret)
> - goto err_unmap;
> -
> return 0;
>
> err_unmap:
> diff --git a/drivers/fpga/altera-pr-ip-core.c b/drivers/fpga/altera-pr-ip-core.c
> index dfdf21ed34c4..17babf974852 100644
> --- a/drivers/fpga/altera-pr-ip-core.c
> +++ b/drivers/fpga/altera-pr-ip-core.c
> @@ -191,11 +191,11 @@ int alt_pr_register(struct device *dev, void __iomem *reg_base)
> (val & ALT_PR_CSR_STATUS_MSK) >> ALT_PR_CSR_STATUS_SFT,
> (int)(val & ALT_PR_CSR_PR_START));
>
> - mgr = devm_fpga_mgr_create(dev, dev_name(dev), &alt_pr_ops, priv);
> - if (!mgr)
> - return -ENOMEM;
> + mgr = devm_fpga_mgr_register(dev, dev_name(dev), &alt_pr_ops, priv);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
>
> - return devm_fpga_mgr_register(dev, mgr);
> + return 0;
> }
> EXPORT_SYMBOL_GPL(alt_pr_register);
>
> diff --git a/drivers/fpga/altera-ps-spi.c b/drivers/fpga/altera-ps-spi.c
> index 23bfd4d1ad0f..d3f77b0312b2 100644
> --- a/drivers/fpga/altera-ps-spi.c
> +++ b/drivers/fpga/altera-ps-spi.c
> @@ -302,12 +302,12 @@ static int altera_ps_probe(struct spi_device *spi)
> snprintf(conf->mgr_name, sizeof(conf->mgr_name), "%s %s",
> dev_driver_string(&spi->dev), dev_name(&spi->dev));
>
> - mgr = devm_fpga_mgr_create(&spi->dev, conf->mgr_name,
> - &altera_ps_ops, conf);
> - if (!mgr)
> - return -ENOMEM;
> + mgr = devm_fpga_mgr_register(&spi->dev, conf->mgr_name,
> + &altera_ps_ops, conf);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
>
> - return devm_fpga_mgr_register(&spi->dev, mgr);
> + return 0;
> }
>
> static const struct spi_device_id altera_ps_spi_ids[] = {
> diff --git a/drivers/fpga/dfl-fme-mgr.c b/drivers/fpga/dfl-fme-mgr.c
> index d5861d13b306..1b93bc292dbe 100644
> --- a/drivers/fpga/dfl-fme-mgr.c
> +++ b/drivers/fpga/dfl-fme-mgr.c
> @@ -264,14 +264,6 @@ static u64 fme_mgr_status(struct fpga_manager *mgr)
> return pr_error_to_mgr_status(priv->pr_error);
> }
>
> -static const struct fpga_manager_ops fme_mgr_ops = {
> - .write_init = fme_mgr_write_init,
> - .write = fme_mgr_write,
> - .write_complete = fme_mgr_write_complete,
> - .state = fme_mgr_state,
> - .status = fme_mgr_status,
> -};
> -
> static void fme_mgr_get_compat_id(void __iomem *fme_pr,
> struct fpga_compat_id *id)
> {
> @@ -279,10 +271,34 @@ static void fme_mgr_get_compat_id(void __iomem *fme_pr,
> id->id_h = readq(fme_pr + FME_PR_INTFC_ID_H);
> }
>
> +static struct fpga_manager_ops *fme_mgr_get_ops(struct device *dev,
> + struct fme_mgr_priv *priv)
> +{
> + struct fpga_manager_ops *ops;
> +
> + ops = devm_kzalloc(dev, sizeof(*ops), GFP_KERNEL);
> + if (!ops)
> + return NULL;
> +
> + ops->compat_id = devm_kzalloc(dev, sizeof(struct fpga_compat_id),
> + GFP_KERNEL);
> + if (!ops->compat_id)
> + return NULL;
> +
> + fme_mgr_get_compat_id(priv->ioaddr, ops->compat_id);
> + ops->write_init = fme_mgr_write_init;
> + ops->write = fme_mgr_write;
> + ops->write_complete = fme_mgr_write_complete;
> + ops->state = fme_mgr_state;
> + ops->status = fme_mgr_status;
> +
> + return ops;
> +}
> +
> static int fme_mgr_probe(struct platform_device *pdev)
> {
> struct dfl_fme_mgr_pdata *pdata = dev_get_platdata(&pdev->dev);
> - struct fpga_compat_id *compat_id;
> + struct fpga_manager_ops *fme_mgr_ops;
> struct device *dev = &pdev->dev;
> struct fme_mgr_priv *priv;
> struct fpga_manager *mgr;
> @@ -302,20 +318,16 @@ static int fme_mgr_probe(struct platform_device *pdev)
> return PTR_ERR(priv->ioaddr);
> }
>
> - compat_id = devm_kzalloc(dev, sizeof(*compat_id), GFP_KERNEL);
> - if (!compat_id)
> - return -ENOMEM;
> -
> - fme_mgr_get_compat_id(priv->ioaddr, compat_id);
> -
> - mgr = devm_fpga_mgr_create(dev, "DFL FME FPGA Manager",
> - &fme_mgr_ops, priv);
> - if (!mgr)
> + fme_mgr_ops = fme_mgr_get_ops(dev, priv);
> + if (!fme_mgr_ops)
> return -ENOMEM;
>
> - mgr->compat_id = compat_id;
> + mgr = devm_fpga_mgr_register(dev, "DFL FME FPGA Manager",
> + fme_mgr_ops, priv);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
With structure fpga_mgr_info, we don't need the dynamical allocation
anymore:
struct fpga_mgr_info minfo = { 0 };
minfo.name = "DFL FME FPGA Manager";
minfo.mops = &fme_mgr_ops;
minfo.compat_id = compat_id;
minfo.priv = priv;
mgr = devm_fpga_mgr_register(dev, &minfo);
Drivers could also leaves minfo.compat_id zero if they don't care.
I also expect more opinions.
>
> - return devm_fpga_mgr_register(dev, mgr);
> + return 0;
> }
>
> static struct platform_driver fme_mgr_driver = {
> diff --git a/drivers/fpga/dfl-fme-region.c b/drivers/fpga/dfl-fme-region.c
> index 1eeb42af1012..a64c13e198a0 100644
> --- a/drivers/fpga/dfl-fme-region.c
> +++ b/drivers/fpga/dfl-fme-region.c
> @@ -46,7 +46,7 @@ static int fme_region_probe(struct platform_device *pdev)
> }
>
> region->priv = pdata;
> - region->compat_id = mgr->compat_id;
> + region->compat_id = mgr->mops->compat_id;
The changes should be in Patch #3, is it?
> platform_set_drvdata(pdev, region);
>
> ret = fpga_region_register(region);
> diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
> index ecb4c3c795fa..9aecfea432c8 100644
> --- a/drivers/fpga/fpga-mgr.c
> +++ b/drivers/fpga/fpga-mgr.c
> @@ -550,20 +550,20 @@ void fpga_mgr_unlock(struct fpga_manager *mgr)
> EXPORT_SYMBOL_GPL(fpga_mgr_unlock);
>
> /**
> - * fpga_mgr_create - create and initialize an FPGA manager struct
> + * fpga_mgr_register - create and register an FPGA Manager device
> * @parent: fpga manager device from pdev
> * @name: fpga manager name
> * @mops: pointer to structure of fpga manager ops
> * @priv: fpga manager private data
> *
> - * The caller of this function is responsible for freeing the struct with
> - * fpga_mgr_free(). Using devm_fpga_mgr_create() instead is recommended.
> + * The caller of this function is responsible for calling fpga_mgr_unregister().
> + * Using devm_fpga_mgr_register instead is recommended.
> *
> - * Return: pointer to struct fpga_manager or NULL
> + * Return: pointer to struct fpga_manager pointer or ERR_PTR()
> */
> -struct fpga_manager *fpga_mgr_create(struct device *parent, const char *name,
> - const struct fpga_manager_ops *mops,
> - void *priv)
> +struct fpga_manager *
> +fpga_mgr_register(struct device *parent, const char *name,
> + const struct fpga_manager_ops *mops, void *priv)
fpga_mgr_register(struct device *parent, struct fpga_mgr_info *minfo)
> {
> struct fpga_manager *mgr;
> int id, ret;
> @@ -572,21 +572,23 @@ struct fpga_manager *fpga_mgr_create(struct device *parent, const char *name,
> !mops->write_init || (!mops->write && !mops->write_sg) ||
> (mops->write && mops->write_sg)) {
> dev_err(parent, "Attempt to register without fpga_manager_ops\n");
> - return NULL;
> + return ERR_PTR(-EINVAL);
> }
>
> if (!name || !strlen(name)) {
> dev_err(parent, "Attempt to register with no name!\n");
> - return NULL;
> + return ERR_PTR(-EINVAL);
> }
>
> mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
> if (!mgr)
> - return NULL;
> + return ERR_PTR(-ENOMEM);
>
> id = ida_simple_get(&fpga_mgr_ida, 0, 0, GFP_KERNEL);
> - if (id < 0)
> + if (id < 0) {
> + ret = id;
> goto error_kfree;
> + }
>
> mutex_init(&mgr->ref_mutex);
>
> @@ -594,7 +596,6 @@ struct fpga_manager *fpga_mgr_create(struct device *parent, const char *name,
> mgr->mops = mops;
> mgr->priv = priv;
mgr->name = minfo->name;
mgr->mops = minfo->mops;
mgr->priv = minfo->priv;
mgr->compat_id = minfo->compat_id;
>
> - device_initialize(&mgr->dev);
> mgr->dev.class = fpga_mgr_class;
> mgr->dev.groups = mops->groups;
> mgr->dev.parent = parent;
> @@ -605,84 +606,6 @@ struct fpga_manager *fpga_mgr_create(struct device *parent, const char *name,
> if (ret)
> goto error_device;
>
> - return mgr;
> -
> -error_device:
> - ida_simple_remove(&fpga_mgr_ida, id);
> -error_kfree:
> - kfree(mgr);
> -
> - return NULL;
> -}
> -EXPORT_SYMBOL_GPL(fpga_mgr_create);
> -
> -/**
> - * fpga_mgr_free - free an FPGA manager created with fpga_mgr_create()
> - * @mgr: fpga manager struct
> - */
> -void fpga_mgr_free(struct fpga_manager *mgr)
> -{
> - ida_simple_remove(&fpga_mgr_ida, mgr->dev.id);
> - kfree(mgr);
> -}
> -EXPORT_SYMBOL_GPL(fpga_mgr_free);
> -
> -static void devm_fpga_mgr_release(struct device *dev, void *res)
> -{
> - struct fpga_mgr_devres *dr = res;
> -
> - fpga_mgr_free(dr->mgr);
> -}
> -
> -/**
> - * devm_fpga_mgr_create - create and initialize a managed FPGA manager struct
> - * @parent: fpga manager device from pdev
> - * @name: fpga manager name
> - * @mops: pointer to structure of fpga manager ops
> - * @priv: fpga manager private data
> - *
> - * This function is intended for use in an FPGA manager driver's probe function.
> - * After the manager driver creates the manager struct with
> - * devm_fpga_mgr_create(), it should register it with fpga_mgr_register(). The
> - * manager driver's remove function should call fpga_mgr_unregister(). The
> - * manager struct allocated with this function will be freed automatically on
> - * driver detach. This includes the case of a probe function returning error
> - * before calling fpga_mgr_register(), the struct will still get cleaned up.
> - *
> - * Return: pointer to struct fpga_manager or NULL
> - */
> -struct fpga_manager *devm_fpga_mgr_create(struct device *parent, const char *name,
> - const struct fpga_manager_ops *mops,
> - void *priv)
> -{
> - struct fpga_mgr_devres *dr;
> -
> - dr = devres_alloc(devm_fpga_mgr_release, sizeof(*dr), GFP_KERNEL);
> - if (!dr)
> - return NULL;
> -
> - dr->mgr = fpga_mgr_create(parent, name, mops, priv);
> - if (!dr->mgr) {
> - devres_free(dr);
> - return NULL;
> - }
> -
> - devres_add(parent, dr);
> -
> - return dr->mgr;
> -}
> -EXPORT_SYMBOL_GPL(devm_fpga_mgr_create);
> -
> -/**
> - * fpga_mgr_register - register an FPGA manager
> - * @mgr: fpga manager struct
> - *
> - * Return: 0 on success, negative error code otherwise.
> - */
> -int fpga_mgr_register(struct fpga_manager *mgr)
> -{
> - int ret;
> -
> /*
> * Initialize framework state by requesting low level driver read state
> * from device. FPGA may be in reset mode or may have been programmed
> @@ -690,18 +613,20 @@ int fpga_mgr_register(struct fpga_manager *mgr)
> */
> mgr->state = mgr->mops->state(mgr);
>
> - ret = device_add(&mgr->dev);
> - if (ret)
> - goto error_device;
> -
> - dev_info(&mgr->dev, "%s registered\n", mgr->name);
> + ret = device_register(&mgr->dev);
> + if (ret) {
> + put_device(&mgr->dev);
> + return ERR_PTR(ret);
> + }
>
> - return 0;
> + return mgr;
>
> error_device:
> - ida_simple_remove(&fpga_mgr_ida, mgr->dev.id);
> + ida_simple_remove(&fpga_mgr_ida, id);
> +error_kfree:
> + kfree(mgr);
>
> - return ret;
> + return ERR_PTR(ret);
> }
> EXPORT_SYMBOL_GPL(fpga_mgr_register);
>
> @@ -726,14 +651,6 @@ void fpga_mgr_unregister(struct fpga_manager *mgr)
> }
> EXPORT_SYMBOL_GPL(fpga_mgr_unregister);
>
> -static int fpga_mgr_devres_match(struct device *dev, void *res,
> - void *match_data)
> -{
> - struct fpga_mgr_devres *dr = res;
> -
> - return match_data == dr->mgr;
> -}
> -
> static void devm_fpga_mgr_unregister(struct device *dev, void *res)
> {
> struct fpga_mgr_devres *dr = res;
> @@ -743,44 +660,44 @@ static void devm_fpga_mgr_unregister(struct device *dev, void *res)
>
> /**
> * devm_fpga_mgr_register - resource managed variant of fpga_mgr_register()
> - * @dev: managing device for this FPGA manager
> - * @mgr: fpga manager struct
> + * @dev: fpga manager device from pdev
> + * @name: fpga manager name
> + * @mops: pointer to structure of fpga manager ops
> + * @priv: fpga manager private data
> *
> * This is the devres variant of fpga_mgr_register() for which the unregister
> * function will be called automatically when the managing device is detached.
> */
> -int devm_fpga_mgr_register(struct device *dev, struct fpga_manager *mgr)
> +struct fpga_manager *
> +devm_fpga_mgr_register(struct device *dev, const char *name,
devm_fpga_mgr_register(struct device *parent,
> + const struct fpga_manager_ops *mops, void *priv)
> {
> struct fpga_mgr_devres *dr;
> - int ret;
> -
> - /*
> - * Make sure that the struct fpga_manager * that is passed in is
> - * managed itself.
> - */
> - if (WARN_ON(!devres_find(dev, devm_fpga_mgr_release,
> - fpga_mgr_devres_match, mgr)))
> - return -EINVAL;
> + struct fpga_manager *mgr;
>
> dr = devres_alloc(devm_fpga_mgr_unregister, sizeof(*dr), GFP_KERNEL);
> if (!dr)
> - return -ENOMEM;
> + return ERR_PTR(-ENOMEM);
>
> - ret = fpga_mgr_register(mgr);
> - if (ret) {
> + mgr = fpga_mgr_register(dev, name, mops, priv);
> + if (IS_ERR(mgr)) {
> devres_free(dr);
> - return ret;
> + return mgr;
> }
>
> dr->mgr = mgr;
> devres_add(dev, dr);
>
> - return 0;
> + return mgr;
> }
> EXPORT_SYMBOL_GPL(devm_fpga_mgr_register);
>
> static void fpga_mgr_dev_release(struct device *dev)
> {
> + struct fpga_manager *mgr = to_fpga_manager(dev);
> +
> + ida_simple_remove(&fpga_mgr_ida, mgr->dev.id);
> + kfree(mgr);
> }
>
> static int __init fpga_mgr_class_init(void)
> diff --git a/drivers/fpga/ice40-spi.c b/drivers/fpga/ice40-spi.c
> index 69dec5af23c3..91ac25f339f3 100644
> --- a/drivers/fpga/ice40-spi.c
> +++ b/drivers/fpga/ice40-spi.c
> @@ -178,12 +178,12 @@ static int ice40_fpga_probe(struct spi_device *spi)
> return ret;
> }
>
> - mgr = devm_fpga_mgr_create(dev, "Lattice iCE40 FPGA Manager",
> - &ice40_fpga_ops, priv);
> - if (!mgr)
> - return -ENOMEM;
> + mgr = devm_fpga_mgr_register(dev, "Lattice iCE40 FPGA Manager",
> + &ice40_fpga_ops, priv);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
>
> - return devm_fpga_mgr_register(dev, mgr);
> + return 0;
> }
>
> static const struct of_device_id ice40_fpga_of_match[] = {
> diff --git a/drivers/fpga/machxo2-spi.c b/drivers/fpga/machxo2-spi.c
> index 114a64d2b7a4..0137c1e2e706 100644
> --- a/drivers/fpga/machxo2-spi.c
> +++ b/drivers/fpga/machxo2-spi.c
> @@ -366,12 +366,12 @@ static int machxo2_spi_probe(struct spi_device *spi)
> return -EINVAL;
> }
>
> - mgr = devm_fpga_mgr_create(dev, "Lattice MachXO2 SPI FPGA Manager",
> - &machxo2_ops, spi);
> - if (!mgr)
> - return -ENOMEM;
> + mgr = devm_fpga_mgr_register(dev, "Lattice MachXO2 SPI FPGA Manager",
> + &machxo2_ops, spi);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
>
> - return devm_fpga_mgr_register(dev, mgr);
> + return 0;
> }
>
> static const struct of_device_id of_match[] = {
> diff --git a/drivers/fpga/socfpga-a10.c b/drivers/fpga/socfpga-a10.c
> index 573d88bdf730..ac8e89b8a5cc 100644
> --- a/drivers/fpga/socfpga-a10.c
> +++ b/drivers/fpga/socfpga-a10.c
> @@ -508,19 +508,15 @@ static int socfpga_a10_fpga_probe(struct platform_device *pdev)
> return -EBUSY;
> }
>
> - mgr = devm_fpga_mgr_create(dev, "SoCFPGA Arria10 FPGA Manager",
> - &socfpga_a10_fpga_mgr_ops, priv);
> - if (!mgr)
> - return -ENOMEM;
> -
> - platform_set_drvdata(pdev, mgr);
> -
> - ret = fpga_mgr_register(mgr);
> - if (ret) {
> + mgr = fpga_mgr_register(dev, "SoCFPGA Arria10 FPGA Manager",
> + &socfpga_a10_fpga_mgr_ops, priv);
> + if (IS_ERR(mgr)) {
> clk_disable_unprepare(priv->clk);
> - return ret;
> + return PTR_ERR(mgr);
> }
>
> + platform_set_drvdata(pdev, mgr);
> +
> return 0;
> }
>
> diff --git a/drivers/fpga/socfpga.c b/drivers/fpga/socfpga.c
> index 1f467173fc1f..ebfa9f4d24ef 100644
> --- a/drivers/fpga/socfpga.c
> +++ b/drivers/fpga/socfpga.c
> @@ -571,12 +571,12 @@ static int socfpga_fpga_probe(struct platform_device *pdev)
> if (ret)
> return ret;
>
> - mgr = devm_fpga_mgr_create(dev, "Altera SOCFPGA FPGA Manager",
> - &socfpga_fpga_ops, priv);
> - if (!mgr)
> - return -ENOMEM;
> + mgr = devm_fpga_mgr_register(dev, "Altera SOCFPGA FPGA Manager",
> + &socfpga_fpga_ops, priv);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
>
> - return devm_fpga_mgr_register(dev, mgr);
> + return 0;
> }
>
> #ifdef CONFIG_OF
> diff --git a/drivers/fpga/stratix10-soc.c b/drivers/fpga/stratix10-soc.c
> index a2cea500f7cc..9155e888a133 100644
> --- a/drivers/fpga/stratix10-soc.c
> +++ b/drivers/fpga/stratix10-soc.c
> @@ -425,18 +425,11 @@ static int s10_probe(struct platform_device *pdev)
>
> init_completion(&priv->status_return_completion);
>
> - mgr = fpga_mgr_create(dev, "Stratix10 SOC FPGA Manager",
> - &s10_ops, priv);
> - if (!mgr) {
> - dev_err(dev, "unable to create FPGA manager\n");
> - ret = -ENOMEM;
> - goto probe_err;
> - }
> -
> - ret = fpga_mgr_register(mgr);
> - if (ret) {
> + mgr = fpga_mgr_register(dev, "Stratix10 SOC FPGA Manager",
> + &s10_ops, priv);
> + if (IS_ERR(mgr)) {
> dev_err(dev, "unable to register FPGA manager\n");
> - fpga_mgr_free(mgr);
> + ret = PTR_ERR(mgr);
> goto probe_err;
> }
>
> @@ -454,7 +447,6 @@ static int s10_remove(struct platform_device *pdev)
> struct s10_priv *priv = mgr->priv;
>
> fpga_mgr_unregister(mgr);
> - fpga_mgr_free(mgr);
> stratix10_svc_free_channel(priv->chan);
>
> return 0;
> diff --git a/drivers/fpga/ts73xx-fpga.c b/drivers/fpga/ts73xx-fpga.c
> index 101f016c6ed8..5efbec2b9f9f 100644
> --- a/drivers/fpga/ts73xx-fpga.c
> +++ b/drivers/fpga/ts73xx-fpga.c
> @@ -122,12 +122,12 @@ static int ts73xx_fpga_probe(struct platform_device *pdev)
> if (IS_ERR(priv->io_base))
> return PTR_ERR(priv->io_base);
>
> - mgr = devm_fpga_mgr_create(kdev, "TS-73xx FPGA Manager",
> - &ts73xx_fpga_ops, priv);
> - if (!mgr)
> - return -ENOMEM;
> + mgr = devm_fpga_mgr_register(kdev, "TS-73xx FPGA Manager",
> + &ts73xx_fpga_ops, priv);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
>
> - return devm_fpga_mgr_register(kdev, mgr);
> + return 0;
> }
>
> static struct platform_driver ts73xx_fpga_driver = {
> diff --git a/drivers/fpga/xilinx-spi.c b/drivers/fpga/xilinx-spi.c
> index fee4d0abf6bf..efda475f7a98 100644
> --- a/drivers/fpga/xilinx-spi.c
> +++ b/drivers/fpga/xilinx-spi.c
> @@ -247,13 +247,13 @@ static int xilinx_spi_probe(struct spi_device *spi)
> return dev_err_probe(&spi->dev, PTR_ERR(conf->done),
> "Failed to get DONE gpio\n");
>
> - mgr = devm_fpga_mgr_create(&spi->dev,
> - "Xilinx Slave Serial FPGA Manager",
> - &xilinx_spi_ops, conf);
> - if (!mgr)
> - return -ENOMEM;
> + mgr = devm_fpga_mgr_register(&spi->dev,
> + "Xilinx Slave Serial FPGA Manager",
> + &xilinx_spi_ops, conf);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
>
> - return devm_fpga_mgr_register(&spi->dev, mgr);
> + return 0;
> }
>
> static const struct of_device_id xlnx_spi_of_match[] = {
> diff --git a/drivers/fpga/zynq-fpga.c b/drivers/fpga/zynq-fpga.c
> index 9b75bd4f93d8..426aa34c6a0d 100644
> --- a/drivers/fpga/zynq-fpga.c
> +++ b/drivers/fpga/zynq-fpga.c
> @@ -609,20 +609,16 @@ static int zynq_fpga_probe(struct platform_device *pdev)
>
> clk_disable(priv->clk);
>
> - mgr = devm_fpga_mgr_create(dev, "Xilinx Zynq FPGA Manager",
> - &zynq_fpga_ops, priv);
> - if (!mgr)
> - return -ENOMEM;
> -
> - platform_set_drvdata(pdev, mgr);
> -
> - err = fpga_mgr_register(mgr);
> - if (err) {
> + mgr = fpga_mgr_register(dev, "Xilinx Zynq FPGA Manager",
> + &zynq_fpga_ops, priv);
> + if (IS_ERR(mgr)) {
> dev_err(dev, "unable to register FPGA manager\n");
> clk_unprepare(priv->clk);
> - return err;
> + return PTR_ERR(mgr);
> }
>
> + platform_set_drvdata(pdev, mgr);
> +
> return 0;
> }
>
> diff --git a/drivers/fpga/zynqmp-fpga.c b/drivers/fpga/zynqmp-fpga.c
> index 125743c9797f..1a6d520985be 100644
> --- a/drivers/fpga/zynqmp-fpga.c
> +++ b/drivers/fpga/zynqmp-fpga.c
> @@ -102,12 +102,12 @@ static int zynqmp_fpga_probe(struct platform_device *pdev)
>
> priv->dev = dev;
>
> - mgr = devm_fpga_mgr_create(dev, "Xilinx ZynqMP FPGA Manager",
> - &zynqmp_fpga_ops, priv);
> - if (!mgr)
> - return -ENOMEM;
> + mgr = devm_fpga_mgr_register(dev, "Xilinx ZynqMP FPGA Manager",
> + &zynqmp_fpga_ops, priv);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
>
> - return devm_fpga_mgr_register(dev, mgr);
> + return 0;
> }
>
> static const struct of_device_id zynqmp_fpga_of_match[] = {
> diff --git a/include/linux/fpga/fpga-mgr.h b/include/linux/fpga/fpga-mgr.h
> index 474c1f506307..d3c6f0153457 100644
> --- a/include/linux/fpga/fpga-mgr.h
> +++ b/include/linux/fpga/fpga-mgr.h
> @@ -105,6 +105,17 @@ struct fpga_image_info {
> #endif
> };
>
> +/**
> + * struct fpga_compat_id - id for compatibility check
> + *
> + * @id_h: high 64bit of the compat_id
> + * @id_l: low 64bit of the compat_id
> + */
> +struct fpga_compat_id {
> + u64 id_h;
> + u64 id_l;
> +};
> +
> /**
> * struct fpga_manager_ops - ops for low level fpga manager drivers
> * @initial_header_size: Maximum number of bytes that should be passed into write_init
> @@ -116,6 +127,7 @@ struct fpga_image_info {
> * @write_complete: set FPGA to operating state after writing is done
> * @fpga_remove: optional: Set FPGA into a specific state during driver remove
> * @groups: optional attribute groups.
> + * @compat_id: optional: FPGA manager id for compatibility check.
> *
> * fpga_manager_ops are the low level functions implemented by a specific
> * fpga manager driver. The optional ones are tested for NULL before being
> @@ -134,6 +146,7 @@ struct fpga_manager_ops {
> struct fpga_image_info *info);
> void (*fpga_remove)(struct fpga_manager *mgr);
> const struct attribute_group **groups;
> + struct fpga_compat_id *compat_id;
We don't have to move compat_id here, keep it in struct fpga_mgr
Thanks,
Yilun
> };
>
> /* FPGA manager status: Partial/Full Reconfiguration errors */
> @@ -143,24 +156,12 @@ struct fpga_manager_ops {
> #define FPGA_MGR_STATUS_IP_PROTOCOL_ERR BIT(3)
> #define FPGA_MGR_STATUS_FIFO_OVERFLOW_ERR BIT(4)
>
> -/**
> - * struct fpga_compat_id - id for compatibility check
> - *
> - * @id_h: high 64bit of the compat_id
> - * @id_l: low 64bit of the compat_id
> - */
> -struct fpga_compat_id {
> - u64 id_h;
> - u64 id_l;
> -};
> -
> /**
> * struct fpga_manager - fpga manager structure
> * @name: name of low level fpga manager
> * @dev: fpga manager device
> * @ref_mutex: only allows one reference to fpga manager
> * @state: state of fpga manager
> - * @compat_id: FPGA manager id for compatibility check.
> * @mops: pointer to struct of fpga manager ops
> * @priv: low level driver private date
> */
> @@ -169,7 +170,6 @@ struct fpga_manager {
> struct device dev;
> struct mutex ref_mutex;
> enum fpga_mgr_states state;
> - struct fpga_compat_id *compat_id;
> const struct fpga_manager_ops *mops;
> void *priv;
> };
> @@ -191,17 +191,14 @@ struct fpga_manager *fpga_mgr_get(struct device *dev);
>
> void fpga_mgr_put(struct fpga_manager *mgr);
>
> -struct fpga_manager *fpga_mgr_create(struct device *dev, const char *name,
> - const struct fpga_manager_ops *mops,
> - void *priv);
> -void fpga_mgr_free(struct fpga_manager *mgr);
> -int fpga_mgr_register(struct fpga_manager *mgr);
> +struct fpga_manager *fpga_mgr_register(struct device *dev, const char *name,
> + const struct fpga_manager_ops *mops,
> + void *priv);
> void fpga_mgr_unregister(struct fpga_manager *mgr);
>
> -int devm_fpga_mgr_register(struct device *dev, struct fpga_manager *mgr);
> -
> -struct fpga_manager *devm_fpga_mgr_create(struct device *dev, const char *name,
> - const struct fpga_manager_ops *mops,
> - void *priv);
> +struct fpga_manager *
> +devm_fpga_mgr_register(struct device *dev, const char *name,
> + const struct fpga_manager_ops *mops,
> + void *priv);
>
> #endif /*_LINUX_FPGA_MGR_H */
> --
> 2.25.1
