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Message-ID: <YNoYhAjh0vydP5yF@epycbox.lan>
Date: Mon, 28 Jun 2021 11:44:20 -0700
From: Moritz Fischer <mdf@...nel.org>
To: trix@...hat.com
Cc: mdf@...nel.org, hao.wu@...el.com, michal.simek@...inx.com,
linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v5 1/4] fpga: generalize updating the card
On Fri, Jun 25, 2021 at 12:58:46PM -0700, trix@...hat.com wrote:
> From: Tom Rix <trix@...hat.com>
>
> There is a need to update the whole card. An fpga can
Not sure I'd use the 'card' language. Not every FPGA sits on a plugin
card / board.
I'd suggest to frame the description around persistent vs
non-persistent.
> contain non-fpga components whose firmware needs to be
> updated at the same time as the fpga rtl images and
> may need to be handled differently from the existing
> fpga reconfiguration in the fpga manager.
Updating images beyond FPGA images is beyond the scope of the FPGA
Manager framework.
>
> Move the write_* ops out of fpga_manager_ops and
> into a new fpga_manager_update_ops struct. Add
> two update_ops back to fpga_manager_ops,
> reconfig for the exiting functionality and
> reimage for the new functionity.
>
> Rewire fpga devs to use reconfig ops
>
> Signed-off-by: Tom Rix <trix@...hat.com>
> ---
> drivers/fpga/altera-cvp.c | 8 ++++----
> drivers/fpga/altera-pr-ip-core.c | 8 ++++----
> drivers/fpga/altera-ps-spi.c | 8 ++++----
> drivers/fpga/dfl-fme-mgr.c | 8 ++++----
> drivers/fpga/fpga-mgr.c | 20 ++++++++++----------
> drivers/fpga/ice40-spi.c | 8 ++++----
> drivers/fpga/machxo2-spi.c | 8 ++++----
> drivers/fpga/socfpga-a10.c | 10 +++++-----
> drivers/fpga/socfpga.c | 8 ++++----
> drivers/fpga/stratix10-soc.c | 6 +++---
> drivers/fpga/ts73xx-fpga.c | 6 +++---
> drivers/fpga/xilinx-spi.c | 8 ++++----
> drivers/fpga/zynq-fpga.c | 10 +++++-----
> drivers/fpga/zynqmp-fpga.c | 6 +++---
> include/linux/fpga/fpga-mgr.h | 32 +++++++++++++++++++++-----------
> 15 files changed, 82 insertions(+), 72 deletions(-)
>
> diff --git a/drivers/fpga/altera-cvp.c b/drivers/fpga/altera-cvp.c
> index ccf4546eff297..9363353798bc9 100644
> --- a/drivers/fpga/altera-cvp.c
> +++ b/drivers/fpga/altera-cvp.c
> @@ -516,10 +516,10 @@ static int altera_cvp_write_complete(struct fpga_manager *mgr,
> }
>
> static const struct fpga_manager_ops altera_cvp_ops = {
> - .state = altera_cvp_state,
> - .write_init = altera_cvp_write_init,
> - .write = altera_cvp_write,
> - .write_complete = altera_cvp_write_complete,
> + .state = altera_cvp_state,
> + .reconfig.write_init = altera_cvp_write_init,
> + .reconfig.write = altera_cvp_write,
> + .reconfig.write_complete = altera_cvp_write_complete,
> };
>
> static const struct cvp_priv cvp_priv_v1 = {
> diff --git a/drivers/fpga/altera-pr-ip-core.c b/drivers/fpga/altera-pr-ip-core.c
> index dfdf21ed34c4e..30c7b534df95b 100644
> --- a/drivers/fpga/altera-pr-ip-core.c
> +++ b/drivers/fpga/altera-pr-ip-core.c
> @@ -167,10 +167,10 @@ static int alt_pr_fpga_write_complete(struct fpga_manager *mgr,
> }
>
> static const struct fpga_manager_ops alt_pr_ops = {
> - .state = alt_pr_fpga_state,
> - .write_init = alt_pr_fpga_write_init,
> - .write = alt_pr_fpga_write,
> - .write_complete = alt_pr_fpga_write_complete,
> + .state = alt_pr_fpga_state,
> + .reconfig.write_init = alt_pr_fpga_write_init,
> + .reconfig.write = alt_pr_fpga_write,
> + .reconfig.write_complete = alt_pr_fpga_write_complete,
> };
>
> int alt_pr_register(struct device *dev, void __iomem *reg_base)
> diff --git a/drivers/fpga/altera-ps-spi.c b/drivers/fpga/altera-ps-spi.c
> index 23bfd4d1ad0f7..2b01a3c53d374 100644
> --- a/drivers/fpga/altera-ps-spi.c
> +++ b/drivers/fpga/altera-ps-spi.c
> @@ -231,10 +231,10 @@ static int altera_ps_write_complete(struct fpga_manager *mgr,
> }
>
> static const struct fpga_manager_ops altera_ps_ops = {
> - .state = altera_ps_state,
> - .write_init = altera_ps_write_init,
> - .write = altera_ps_write,
> - .write_complete = altera_ps_write_complete,
> + .state = altera_ps_state,
> + .reconfig.write_init = altera_ps_write_init,
> + .reconfig.write = altera_ps_write,
> + .reconfig.write_complete = altera_ps_write_complete,
> };
>
> static const struct altera_ps_data *id_to_data(const struct spi_device_id *id)
> diff --git a/drivers/fpga/dfl-fme-mgr.c b/drivers/fpga/dfl-fme-mgr.c
> index 313420405d5e8..a6d2ed399e580 100644
> --- a/drivers/fpga/dfl-fme-mgr.c
> +++ b/drivers/fpga/dfl-fme-mgr.c
> @@ -260,10 +260,10 @@ static u64 fme_mgr_status(struct fpga_manager *mgr)
> }
>
> 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,
> - .status = fme_mgr_status,
> + .status = fme_mgr_status,
> + .reconfig.write_init = fme_mgr_write_init,
> + .reconfig.write = fme_mgr_write,
> + .reconfig.write_complete = fme_mgr_write_complete,
> };
>
> static void fme_mgr_get_compat_id(void __iomem *fme_pr,
> diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
> index aa30889e23208..31c51d7e07cc8 100644
> --- a/drivers/fpga/fpga-mgr.c
> +++ b/drivers/fpga/fpga-mgr.c
> @@ -47,8 +47,8 @@ static inline u64 fpga_mgr_status(struct fpga_manager *mgr)
>
> static inline int fpga_mgr_write(struct fpga_manager *mgr, const char *buf, size_t count)
> {
> - if (mgr->mops->write)
> - return mgr->mops->write(mgr, buf, count);
> + if (mgr->mops->reconfig.write)
> + return mgr->mops->reconfig.write(mgr, buf, count);
> return -EOPNOTSUPP;
> }
>
> @@ -62,8 +62,8 @@ static inline int fpga_mgr_write_complete(struct fpga_manager *mgr,
> int ret = 0;
>
> mgr->state = FPGA_MGR_STATE_WRITE_COMPLETE;
> - if (mgr->mops->write_complete)
> - ret = mgr->mops->write_complete(mgr, info);
> + if (mgr->mops->reconfig.write_complete)
> + ret = mgr->mops->reconfig.write_complete(mgr, info);
> if (ret) {
> dev_err(&mgr->dev, "Error after writing image data to FPGA\n");
> mgr->state = FPGA_MGR_STATE_WRITE_COMPLETE_ERR;
> @@ -78,16 +78,16 @@ static inline int fpga_mgr_write_init(struct fpga_manager *mgr,
> struct fpga_image_info *info,
> const char *buf, size_t count)
> {
> - if (mgr->mops->write_init)
> - return mgr->mops->write_init(mgr, info, buf, count);
> + if (mgr->mops->reconfig.write_init)
> + return mgr->mops->reconfig.write_init(mgr, info, buf, count);
> return 0;
> }
>
> static inline int fpga_mgr_write_sg(struct fpga_manager *mgr,
> struct sg_table *sgt)
> {
> - if (mgr->mops->write_sg)
> - return mgr->mops->write_sg(mgr, sgt);
> + if (mgr->mops->reconfig.write_sg)
> + return mgr->mops->reconfig.write_sg(mgr, sgt);
> return -EOPNOTSUPP;
> }
>
> @@ -232,7 +232,7 @@ static int fpga_mgr_buf_load_sg(struct fpga_manager *mgr,
>
> /* Write the FPGA image to the FPGA. */
> mgr->state = FPGA_MGR_STATE_WRITE;
> - if (mgr->mops->write_sg) {
> + if (mgr->mops->reconfig.write_sg) {
> ret = fpga_mgr_write_sg(mgr, sgt);
> } else {
> struct sg_mapping_iter miter;
> @@ -309,7 +309,7 @@ static int fpga_mgr_buf_load(struct fpga_manager *mgr,
> * contiguous kernel buffer and the driver doesn't require SG, non-SG
> * drivers will still work on the slow path.
> */
> - if (mgr->mops->write)
> + if (mgr->mops->reconfig.write)
> return fpga_mgr_buf_load_mapped(mgr, info, buf, count);
>
> /*
> diff --git a/drivers/fpga/ice40-spi.c b/drivers/fpga/ice40-spi.c
> index 69dec5af23c36..3bdc3fe8ece97 100644
> --- a/drivers/fpga/ice40-spi.c
> +++ b/drivers/fpga/ice40-spi.c
> @@ -126,10 +126,10 @@ static int ice40_fpga_ops_write_complete(struct fpga_manager *mgr,
> }
>
> static const struct fpga_manager_ops ice40_fpga_ops = {
> - .state = ice40_fpga_ops_state,
> - .write_init = ice40_fpga_ops_write_init,
> - .write = ice40_fpga_ops_write,
> - .write_complete = ice40_fpga_ops_write_complete,
> + .state = ice40_fpga_ops_state,
> + .reconfig.write_init = ice40_fpga_ops_write_init,
> + .reconfig.write = ice40_fpga_ops_write,
> + .reconfig.write_complete = ice40_fpga_ops_write_complete,
> };
>
> static int ice40_fpga_probe(struct spi_device *spi)
> diff --git a/drivers/fpga/machxo2-spi.c b/drivers/fpga/machxo2-spi.c
> index 114a64d2b7a4d..8b860e9a19c92 100644
> --- a/drivers/fpga/machxo2-spi.c
> +++ b/drivers/fpga/machxo2-spi.c
> @@ -350,10 +350,10 @@ static int machxo2_write_complete(struct fpga_manager *mgr,
> }
>
> static const struct fpga_manager_ops machxo2_ops = {
> - .state = machxo2_spi_state,
> - .write_init = machxo2_write_init,
> - .write = machxo2_write,
> - .write_complete = machxo2_write_complete,
> + .state = machxo2_spi_state,
> + .reconfig.write_init = machxo2_write_init,
> + .reconfig.write = machxo2_write,
> + .reconfig.write_complete = machxo2_write_complete,
> };
>
> static int machxo2_spi_probe(struct spi_device *spi)
> diff --git a/drivers/fpga/socfpga-a10.c b/drivers/fpga/socfpga-a10.c
> index 573d88bdf7307..e60bf844b4c40 100644
> --- a/drivers/fpga/socfpga-a10.c
> +++ b/drivers/fpga/socfpga-a10.c
> @@ -458,11 +458,11 @@ static enum fpga_mgr_states socfpga_a10_fpga_state(struct fpga_manager *mgr)
> }
>
> static const struct fpga_manager_ops socfpga_a10_fpga_mgr_ops = {
> - .initial_header_size = (RBF_DECOMPRESS_OFFSET + 1) * 4,
> - .state = socfpga_a10_fpga_state,
> - .write_init = socfpga_a10_fpga_write_init,
> - .write = socfpga_a10_fpga_write,
> - .write_complete = socfpga_a10_fpga_write_complete,
> + .initial_header_size = (RBF_DECOMPRESS_OFFSET + 1) * 4,
> + .state = socfpga_a10_fpga_state,
> + .reconfig.write_init = socfpga_a10_fpga_write_init,
> + .reconfig.write = socfpga_a10_fpga_write,
> + .reconfig.write_complete = socfpga_a10_fpga_write_complete,
> };
>
> static int socfpga_a10_fpga_probe(struct platform_device *pdev)
> diff --git a/drivers/fpga/socfpga.c b/drivers/fpga/socfpga.c
> index 1f467173fc1f3..cc752a3f742c2 100644
> --- a/drivers/fpga/socfpga.c
> +++ b/drivers/fpga/socfpga.c
> @@ -534,10 +534,10 @@ static enum fpga_mgr_states socfpga_fpga_ops_state(struct fpga_manager *mgr)
> }
>
> static const struct fpga_manager_ops socfpga_fpga_ops = {
> - .state = socfpga_fpga_ops_state,
> - .write_init = socfpga_fpga_ops_configure_init,
> - .write = socfpga_fpga_ops_configure_write,
> - .write_complete = socfpga_fpga_ops_configure_complete,
> + .state = socfpga_fpga_ops_state,
> + .reconfig.write_init = socfpga_fpga_ops_configure_init,
> + .reconfig.write = socfpga_fpga_ops_configure_write,
> + .reconfig.write_complete = socfpga_fpga_ops_configure_complete,
> };
>
> static int socfpga_fpga_probe(struct platform_device *pdev)
> diff --git a/drivers/fpga/stratix10-soc.c b/drivers/fpga/stratix10-soc.c
> index 047fd7f237069..ab1941d92cf60 100644
> --- a/drivers/fpga/stratix10-soc.c
> +++ b/drivers/fpga/stratix10-soc.c
> @@ -389,9 +389,9 @@ static int s10_ops_write_complete(struct fpga_manager *mgr,
> }
>
> static const struct fpga_manager_ops s10_ops = {
> - .write_init = s10_ops_write_init,
> - .write = s10_ops_write,
> - .write_complete = s10_ops_write_complete,
> + .reconfig.write_init = s10_ops_write_init,
> + .reconfig.write = s10_ops_write,
> + .reconfig.write_complete = s10_ops_write_complete,
> };
>
> static int s10_probe(struct platform_device *pdev)
> diff --git a/drivers/fpga/ts73xx-fpga.c b/drivers/fpga/ts73xx-fpga.c
> index 167abb0b08d40..cbbc6dec56856 100644
> --- a/drivers/fpga/ts73xx-fpga.c
> +++ b/drivers/fpga/ts73xx-fpga.c
> @@ -93,9 +93,9 @@ static int ts73xx_fpga_write_complete(struct fpga_manager *mgr,
> }
>
> static const struct fpga_manager_ops ts73xx_fpga_ops = {
> - .write_init = ts73xx_fpga_write_init,
> - .write = ts73xx_fpga_write,
> - .write_complete = ts73xx_fpga_write_complete,
> + .reconfig.write_init = ts73xx_fpga_write_init,
> + .reconfig.write = ts73xx_fpga_write,
> + .reconfig.write_complete = ts73xx_fpga_write_complete,
> };
>
> static int ts73xx_fpga_probe(struct platform_device *pdev)
> diff --git a/drivers/fpga/xilinx-spi.c b/drivers/fpga/xilinx-spi.c
> index fee4d0abf6bfe..4d092f30bf700 100644
> --- a/drivers/fpga/xilinx-spi.c
> +++ b/drivers/fpga/xilinx-spi.c
> @@ -214,10 +214,10 @@ static int xilinx_spi_write_complete(struct fpga_manager *mgr,
> }
>
> static const struct fpga_manager_ops xilinx_spi_ops = {
> - .state = xilinx_spi_state,
> - .write_init = xilinx_spi_write_init,
> - .write = xilinx_spi_write,
> - .write_complete = xilinx_spi_write_complete,
> + .state = xilinx_spi_state,
> + .reconfig.write_init = xilinx_spi_write_init,
> + .reconfig.write = xilinx_spi_write,
> + .reconfig.write_complete = xilinx_spi_write_complete,
> };
>
> static int xilinx_spi_probe(struct spi_device *spi)
> diff --git a/drivers/fpga/zynq-fpga.c b/drivers/fpga/zynq-fpga.c
> index 9b75bd4f93d8e..bdfc257740cff 100644
> --- a/drivers/fpga/zynq-fpga.c
> +++ b/drivers/fpga/zynq-fpga.c
> @@ -543,11 +543,11 @@ static enum fpga_mgr_states zynq_fpga_ops_state(struct fpga_manager *mgr)
> }
>
> static const struct fpga_manager_ops zynq_fpga_ops = {
> - .initial_header_size = 128,
> - .state = zynq_fpga_ops_state,
> - .write_init = zynq_fpga_ops_write_init,
> - .write_sg = zynq_fpga_ops_write,
> - .write_complete = zynq_fpga_ops_write_complete,
> + .initial_header_size = 128,
> + .state = zynq_fpga_ops_state,
> + .reconfig.write_init = zynq_fpga_ops_write_init,
> + .reconfig.write_sg = zynq_fpga_ops_write,
> + .reconfig.write_complete = zynq_fpga_ops_write_complete,
> };
>
> static int zynq_fpga_probe(struct platform_device *pdev)
> diff --git a/drivers/fpga/zynqmp-fpga.c b/drivers/fpga/zynqmp-fpga.c
> index 9efbd70aa6864..fbb66c1f9c871 100644
> --- a/drivers/fpga/zynqmp-fpga.c
> +++ b/drivers/fpga/zynqmp-fpga.c
> @@ -78,9 +78,9 @@ static enum fpga_mgr_states zynqmp_fpga_ops_state(struct fpga_manager *mgr)
> }
>
> static const struct fpga_manager_ops zynqmp_fpga_ops = {
> - .state = zynqmp_fpga_ops_state,
> - .write_init = zynqmp_fpga_ops_write_init,
> - .write = zynqmp_fpga_ops_write,
> + .state = zynqmp_fpga_ops_state,
> + .reconfig.write_init = zynqmp_fpga_ops_write_init,
> + .reconfig.write = zynqmp_fpga_ops_write,
> };
>
> static int zynqmp_fpga_probe(struct platform_device *pdev)
> diff --git a/include/linux/fpga/fpga-mgr.h b/include/linux/fpga/fpga-mgr.h
> index 474c1f5063070..53f9402d6aa17 100644
> --- a/include/linux/fpga/fpga-mgr.h
> +++ b/include/linux/fpga/fpga-mgr.h
> @@ -106,14 +106,29 @@ struct fpga_image_info {
> };
>
> /**
> - * 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
> - * @state: returns an enum value of the FPGA's state
> - * @status: returns status of the FPGA, including reconfiguration error code
> + * struct fpga_manager_update_ops - ops updating fpga
> * @write_init: prepare the FPGA to receive configuration data
> * @write: write count bytes of configuration data to the FPGA
> * @write_sg: write the scatter list of configuration data to the FPGA
> * @write_complete: set FPGA to operating state after writing is done
> + */
> +struct fpga_manager_update_ops {
> + int (*write_init)(struct fpga_manager *mgr,
> + struct fpga_image_info *info,
> + const char *buf, size_t count);
> + int (*write)(struct fpga_manager *mgr, const char *buf, size_t count);
> + int (*write_sg)(struct fpga_manager *mgr, struct sg_table *sgt);
> + int (*write_complete)(struct fpga_manager *mgr,
> + struct fpga_image_info *info);
> +};
> +
> +/**
> + * 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
> + * @state: returns an enum value of the FPGA's state
> + * @status: returns status of the FPGA, including reconfiguration error code
> + * @partial_update: ops for doing partial reconfiguration
> + * @full_update: ops for doing a full card update, user,shell,fw ie. the works
> * @fpga_remove: optional: Set FPGA into a specific state during driver remove
> * @groups: optional attribute groups.
> *
> @@ -125,13 +140,8 @@ struct fpga_manager_ops {
> size_t initial_header_size;
> enum fpga_mgr_states (*state)(struct fpga_manager *mgr);
> u64 (*status)(struct fpga_manager *mgr);
> - int (*write_init)(struct fpga_manager *mgr,
> - struct fpga_image_info *info,
> - const char *buf, size_t count);
> - int (*write)(struct fpga_manager *mgr, const char *buf, size_t count);
> - int (*write_sg)(struct fpga_manager *mgr, struct sg_table *sgt);
> - int (*write_complete)(struct fpga_manager *mgr,
> - struct fpga_image_info *info);
> + struct fpga_manager_update_ops reconfig;
> + struct fpga_manager_update_ops reimage;
> void (*fpga_remove)(struct fpga_manager *mgr);
> const struct attribute_group **groups;
> };
> --
> 2.26.3
>
Thanks,
Moritz
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