[U-Boot] [PATCH v3 1/2] common: image: update boot_get_fpga to support arbitrary fpga image
Michal Simek
michal.simek at xilinx.com
Tue Feb 21 12:21:30 UTC 2017
On 20.2.2017 16:46, Dalon Westergreen wrote:
> On Mon, 2017-02-20 at 16:16 +0100, Michal Simek wrote:
>> On 20.2.2017 15:56, Dalon Westergreen wrote:
>>>
>>> The implementation of boot_get_fpga only supported one fpga family.
>>> This modification allows for any of the fpga devices supported by
>>> fpga_load to be used.
>>>
>>> Signed-off-by: Dalon Westergreen <dwesterg at gmail.com>
>>>
>>> --
>>> Changes in v3:
>>> - Fix typos/caps in comments
>>> Changes in v2:
>>> - Add fitimage support for fpga-devnum and fpga-partial-image
>>> - Use above in boot_get_fpga
>>> - for xilinx fpgas double check using image size to determine
>>> if image is a partial image
>>> ---
>>> common/image-fit.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
>>> common/image.c | 51 ++++++++++++++++++++++++++++++++-------------------
>>> include/image.h | 5 +++++
>>> 3 files changed, 88 insertions(+), 19 deletions(-)
>>>
>>> diff --git a/common/image-fit.c b/common/image-fit.c
>>> index 109ecfa..eb0c633 100644
>>> --- a/common/image-fit.c
>>> +++ b/common/image-fit.c
>>> @@ -916,6 +916,57 @@ ulong fit_get_end(const void *fit)
>>> }
>>>
>>> /**
>>> + * fit_image_fpga_get_devnum - get fpga devnum
>>> + * @fit: pointer to the FIT format image header
>>> + * @noffset: fpga node offset
>>> + * @devnum: pointer to an int, will hold fpga devnum
>>> + *
>>> + * fit_image_fpga_get_devnum() finds the fpga devnum for which the fpga
>>> data is
>>> + * intended. If the property is not found, we default to 0.
>>> + *
>>> + * returns:
>>> + * 0, on devnum not found
>>> + * value, on devnum found
>>> + */
>>> +int fit_image_fpga_get_devnum(const void *fit, int noffset, int *devnum)
>>> +{
>>> + int len;
>>> + int *value;
>>> +
>>> + value = (int *)fdt_getprop(fit, noffset, FIT_FPGA_DEVNUM_PROP,
>>> &len);
>>> + if (value == NULL || len != sizeof(int))
>>> + *devnum = 0;
>>> + else
>>> + *devnum = *value;
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +/**
>>> + * fit_image_fpga_is_partial - is partial fpga
>>
>> bitstream.
>
> will do.
>
>>>
>>> + * @fit: pointer to the FIT format image header
>>> + * @noffset: fpga node offset
>>> + *
>>> + * fit_image_fpga_is_partial() checks if the fpga node sets the property
>>> + * indicating the data represents a partial fpga image.
>>> + *
>>> + * returns:
>>> + * 0, on devnum not found
>>> + * value, on devnum found
>>> + */
>>> +int fit_image_fpga_is_partial(const void *fit, int noffset)
>>> +{
>>> + int len;
>>> + int *value;
>>> +
>>> + value = (int *)fdt_getprop(fit, noffset, FIT_FPGA_PARTIAL_PROP,
>>> &len);
>>> + if ((value == NULL || len != sizeof(int)) || (value == 0))
>>> + return 0;
>>> + else
>>> + return 1;
>>> +}
>>> +
>>> +/**
>>> * fit_set_timestamp - set node timestamp property
>>> * @fit: pointer to the FIT format image header
>>> * @noffset: node offset
>>> diff --git a/common/image.c b/common/image.c
>>> index 0f88984..6480b0a 100644
>>> --- a/common/image.c
>>> +++ b/common/image.c
>>> @@ -1306,7 +1306,7 @@ int boot_get_setup(bootm_headers_t *images, uint8_t
>>> arch,
>>> }
>>>
>>> #if IMAGE_ENABLE_FIT
>>> -#if defined(CONFIG_FPGA) && defined(CONFIG_FPGA_XILINX)
>>> +#if defined(CONFIG_FPGA)
>>> int boot_get_fpga(int argc, char * const argv[], bootm_headers_t *images,
>>> uint8_t arch, const ulong *ld_start, ulong * const
>>> ld_len)
>>> {
>>> @@ -1316,9 +1316,10 @@ int boot_get_fpga(int argc, char * const argv[],
>>> bootm_headers_t *images,
>>> int fit_img_result;
>>> const char *uname, *name;
>>> int err;
>>> - int devnum = 0; /* TODO support multi fpga platforms */
>>> - const fpga_desc * const desc = fpga_get_desc(devnum);
>>> - xilinx_desc *desc_xilinx = desc->devdesc;
>>> + int devnum;
>>> + const fpga_desc *desc;
>>> + xilinx_desc *desc_xilinx;
>>> + bitstream_type bstype = BIT_FULL;
>>>
>>> /* Check to see if the images struct has a FIT configuration */
>>> if (!genimg_has_config(images)) {
>>> @@ -1365,26 +1366,38 @@ int boot_get_fpga(int argc, char * const argv[],
>>> bootm_headers_t *images,
>>> return fit_img_result;
>>> }
>>>
>>> - if (img_len >= desc_xilinx->size) {
>>> - name = "full";
>>> - err = fpga_loadbitstream(devnum, (char *)img_data,
>>> - img_len, BIT_FULL);
>>> - if (err)
>>> - err = fpga_load(devnum, (const void
>>> *)img_data,
>>> - img_len, BIT_FULL);
>>> - } else {
>>> - name = "partial";
>>> - err = fpga_loadbitstream(devnum, (char *)img_data,
>>> - img_len, BIT_PARTIAL);
>>> - if (err)
>>> - err = fpga_load(devnum, (const void
>>> *)img_data,
>>> - img_len, BIT_PARTIAL);
>>> + /* Get FPGA device number, defaults to 0 */
>>> + fit_image_fpga_get_devnum(buf, conf_noffset, &devnum);
>>> +
>>> + /* Check bitstream type */
>>> + if (fit_image_fpga_is_partial(buf, conf_noffset))
>>> + bstype = BIT_PARTIAL;
>>> +
>>> + /* Legacy support detecting partial config files for Xilinx
>>> */
>>> + desc = fpga_get_desc(devnum);
>>> + if (desc->devtype == fpga_xilinx) {
>>> + desc_xilinx = desc->devdesc;
>>> + if (img_len < desc_xilinx->size)
>>> + bstype = BIT_PARTIAL;
>>> }
>>>
>>> + /* Try bitstream format first */
>>> + err = fpga_loadbitstream(devnum, (char *)img_data,
>>> + img_len, bstype);
>>> + if (err)
>>> + err = fpga_load(devnum, (const void *)img_data,
>>> + img_len, bstype);
>>> +
>>> if (err)
>>> return err;
>>>
>>> - printf(" Programming %s bitstream... OK\n", name);
>>> + if (bstype == BIT_PARTIAL)
>>> + name = "partial";
>>> + else
>>> + name = "full";
>>> +
>>> + printf(" Programming %s bitstream into fpga %d... OK\n",
>>> + name, devnum);
>>> break;
>>> default:
>>> printf("The given image format is not supported
>>> (corrupt?)\n");
>>> diff --git a/include/image.h b/include/image.h
>>> index 1e686b7..75d2afc 100644
>>> --- a/include/image.h
>>> +++ b/include/image.h
>>> @@ -876,6 +876,8 @@ int bootz_setup(ulong image, ulong *start, ulong *end);
>>> #define FIT_COMP_PROP "compression"
>>> #define FIT_ENTRY_PROP "entry"
>>> #define FIT_LOAD_PROP "load"
>>> +#define FIT_FPGA_DEVNUM_PROP "fpga-devnum"
>>
>> tbh I am not quite sure if we should introduce this.
>> Please look below.
>>
>>
>>>
>>> +#define FIT_FPGA_PARTIAL_PROP "fpga-partial-image"
>>
>> I would suggest to use "partial-fpga-config" because this is what Alan
>> is pushing to mainline kernel. Make no sense to use something different.
>
> Good point.
>
>>>
>>>
>>> /* configuration node */
>>> #define FIT_KERNEL_PROP "kernel"
>>> @@ -955,6 +957,9 @@ int fit_image_hash_get_value(const void *fit, int
>>> noffset, uint8_t **value,
>>>
>>> int fit_set_timestamp(void *fit, int noffset, time_t timestamp);
>>>
>>> +int fit_image_fpga_get_devnum(const void *fit, int noffset, int *devnum);
>>> +int fit_image_fpga_is_partial(const void *fit, int noffset);
>>> +
>>> /**
>>> * fit_add_verification_data() - add verification data to FIT image nodes
>>> *
>>>
>>
>> I have not a problem with this patch. I didn't test it yet but I will do
>> it. It should probably go through my tree anyway.
>>
>> There are some things which should be good to keep in mind.
>> 1. DM - all fpga drivers are using legacy model and we should really
>> consider to move that stuff to DM and use binding for it.
>>
>> 2. overlays. DT overlays were added recently to u-boot and we should add
>> support for it. Then in general fpga commands can go away entirely and
>> we will just apply overlays directly and this will require DM.
>>
>> / {
>> fragment {
>> target = <&fpga_region0>;
>> __overlay__ {
>> #address-cells = <1>;
>> #size-cells = <1>;
>> firmware-name = "XXXX";
>> partial-fpga-config;
>> gpio_on: gpio at 412c0000 {
>> ...
>> };
>> };
>> };
>> };
>>
>> Here is visible that target replaces devnum.
>
> I do love overlays, but am not sure if target would replace devnum. My
> intent for devnum is to support multiple fpgas, not multiple fpga regions.
> That said, nothing says an fpga region couldnt point to fpga managers for
> the different fgpa devices...
right. fpga region has fpga-mgr property and in general you can use this
link as target instead.
>
> I also think that even if support for overlays is implemented in uboot
> there is a case for the simpler method where the end os is not linux.
> Maybe after DM is implemented the fitimage can use target instead of
> devnum?
not sure if you have system with multiple fpgas to load. Definitely it
is easy to set it up.
If you don't have this setup I would add this patch without devnum
specified and 0 is used all the time which is common case.
And let's start to look at DM where we can get that link for others fpgas.
Thanks,
Michal
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