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SubjectRE: [PATCH 3/3] fpga: intel: Add QSPI FPGA Management Entity Feature
Date
> On Sun, Aug 6, 2017 at 1:24 PM,  <matthew.gerlach@linux.intel.com> wrote:
>
> + Wu Hao and the people who signed off on the Intel feature-dev stuff.
>
> Hi Matthew,
>
> By the way, this patch is against v1 of their patchset. They have v2 out.
>
> You could submit your next version with more conventional numbering
> and just note that the last patch is dependent on the Intel fpga
> patchset.
>
> > From: Matthew Gerlach <matthew.gerlach@linux.intel.com>
> >
> > Add FPGA Management Entity Feature to support Atera
> > ASMI Parallel 2 IP core. This feature allows
> > the flash used to configure the FPGA at power up
> > to be updated over PCIe using mtd-utils.
> >
> > Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com>
> > ---
> > drivers/fpga/intel/feature-dev.h | 6 ++-
> > drivers/fpga/intel/fme-main.c | 100
> +++++++++++++++++++++++++++++++++++++++
> > drivers/fpga/intel/pcie.c | 7 +++
> > drivers/fpga/intel/pcie_check.c | 6 +++
> > 4 files changed, 117 insertions(+), 2 deletions(-)
>
> The Intel patchset creates a new way to enumerate generic devices on
> fpga's and not just FME's and ports. But it involves touching 4 files
> and adding 100 lines to fme-main.c. Is there a way that adding a new
> device could just mean adding a struct in the device driver itself and
> registering it with that framework?

I think this is a sub feature of FME module implemented in BBS (static region),
so it follows the same way as other sub feature (e.g partial reconfiguration -
intel-fme-pr), and it needs to modify the fme driver module. The only difference
here is it doesn't put its own code to a separated file like intel-fme-pr.c for FME
Partial Reconfiguration sub feature, so you see it adds more lines to fme-main.c.

Thanks
Hao

>
> Alan
>
> >
> > diff --git a/drivers/fpga/intel/feature-dev.h b/drivers/fpga/intel/feature-dev.h
> > index 9303828..5ae799b 100644
> > --- a/drivers/fpga/intel/feature-dev.h
> > +++ b/drivers/fpga/intel/feature-dev.h
> > @@ -40,6 +40,7 @@
> > #define FME_FEATURE_GLOBAL_PERF "fme_gperf"
> > #define FME_FEATURE_GLOBAL_ERR "fme_error"
> > #define FME_FEATURE_PR_MGMT "fme_pr"
> > +#define FME_FEATURE_QSPI_FLASH "fme_qspi_flash"
> >
> > #define PORT_FEATURE_HEADER "port_hdr"
> > #define PORT_FEATURE_UAFU "port_uafu"
> > @@ -60,6 +61,7 @@
> > #define FME_GLOBAL_PERF_REVISION 0
> > #define FME_GLOBAL_ERR_REVISION 0
> > #define FME_PR_MGMT_REVISION 1
> > +#define FME_QSPI_REVISION 0
> >
> > #define PORT_HEADER_REVISION 0
> > /* UAFU's header info depends on the downloaded GBS */
> > @@ -1225,9 +1227,9 @@ enum fme_feature_id {
> > FME_FEATURE_ID_GLOBAL_PERF = 0x3,
> > FME_FEATURE_ID_GLOBAL_ERR = 0x4,
> > FME_FEATURE_ID_PR_MGMT = 0x5,
> > -
> > + FME_FEATURE_ID_QSPI_FLASH = 0x6,
> > /* one for fme header. */
> > - FME_FEATURE_ID_MAX = 0x6,
> > + FME_FEATURE_ID_MAX = 0x7,
> > };
> >
> > enum port_feature_id {
> > diff --git a/drivers/fpga/intel/fme-main.c b/drivers/fpga/intel/fme-main.c
> > index 776fe36..03aacb3 100644
> > --- a/drivers/fpga/intel/fme-main.c
> > +++ b/drivers/fpga/intel/fme-main.c
> > @@ -27,6 +27,7 @@
> > #include <linux/uaccess.h>
> > #include <linux/intel-fpga.h>
> > #include <linux/fpga/fpga-mgr.h>
> > +#include <linux/mtd/altera-asmip2.h>
> >
> > #include "feature-dev.h"
> > #include "fme.h"
> > @@ -659,6 +660,101 @@ struct feature_ops power_mgmt_ops = {
> > .uinit = power_mgmt_uinit,
> > };
> >
> > +#define FLASH_CAPABILITY_OFT 8
> > +
> > +static int qspi_flash_init(struct platform_device *pdev,
> > + struct feature *feature)
> > +{
> > + u64 reg;
> > + struct altera_asmip2_plat_data qdata;
> > + struct platform_device *cdev;
> > + int ret = 0;
> > + char name[40];
> > +
> > + scnprintf(name, sizeof(name), "%s-%p", feature->name, feature->ioaddr);
> > +
> > + reg = readq(feature->ioaddr + FLASH_CAPABILITY_OFT);
> > + dev_info(&pdev->dev, "%s %s %d 0x%llx 0x%x 0x%x\n",
> > + __func__, name, feature->resource_index,
> > + reg, readl(feature->ioaddr + FLASH_CAPABILITY_OFT),
> > + readl(feature->ioaddr + FLASH_CAPABILITY_OFT + 4));
> > +
> > +
> > + cdev = platform_device_alloc(name, PLATFORM_DEVID_NONE);
> > +
> > + if (!cdev) {
> > + dev_err(&pdev->dev, "platform_device_alloc failed in %s\n",
> > + __func__);
> > + return -ENOMEM;
> > + }
> > +
> > + cdev->dev.parent = &pdev->dev;
> > +
> > + memset(&qdata, 0, sizeof(qdata));
> > + qdata.csr_base = feature->ioaddr + FLASH_CAPABILITY_OFT;
> > + qdata.num_chip_sel = 1;
> > +
> > + ret = platform_device_add_data(cdev, &qdata, sizeof(qdata));
> > +
> > + if (ret) {
> > + dev_err(&pdev->dev, "platform_device_add_data in %s\n",
> > + __func__);
> > + goto error;
> > + }
> > +
> > + cdev->driver_override = kstrdup(ALTERA_ASMIP2_DRV_NAME,
> GFP_KERNEL);
> > +
> > + ret = platform_device_add(cdev);
> > +
> > + if (ret) {
> > + dev_err(&pdev->dev, "platform_device_add failed with %d\n",
> > + ret);
> > + goto error;
> > + }
> > + return ret;
> > +
> > +error:
> > + platform_device_put(cdev);
> > + return ret;
> > +}
> > +
> > +static int qspi_match(struct device *dev, void *data)
> > +{
> > + return !strcmp(dev_name(dev), data);
> > +}
> > +
> > +static void qspi_flash_uinit(struct platform_device *pdev,
> > + struct feature *feature)
> > +{
> > + struct device *parent = &pdev->dev;
> > + struct device *dev;
> > + struct platform_device *cdev;
> > + char name[40];
> > +
> > + scnprintf(name, sizeof(name), "%s-%p", feature->name, feature->ioaddr);
> > +
> > + dev = device_find_child(parent, name, qspi_match);
> > +
> > + if (!dev) {
> > + dev_err(&pdev->dev, "%s NOT found\n",
> ALTERA_ASMIP2_DRV_NAME);
> > + return;
> > + }
> > +
> > + cdev = to_platform_device(dev);
> > +
> > + if (!cdev) {
> > + dev_err(&pdev->dev, "no platform container\n");
> > + return;
> > + }
> > +
> > + platform_device_unregister(cdev);
> > +}
> > +
> > +struct feature_ops qspi_flash_ops = {
> > + .init = qspi_flash_init,
> > + .uinit = qspi_flash_uinit,
> > +};
> > +
> > static struct feature_driver fme_feature_drvs[] = {
> > {
> > .name = FME_FEATURE_HEADER,
> > @@ -685,6 +781,10 @@ static struct feature_driver fme_feature_drvs[] = {
> > .ops = &global_perf_ops,
> > },
> > {
> > + .name = FME_FEATURE_QSPI_FLASH,
> > + .ops = &qspi_flash_ops,
> > + },
> > + {
> > .ops = NULL,
> > },
> > };
> > diff --git a/drivers/fpga/intel/pcie.c b/drivers/fpga/intel/pcie.c
> > index a64151a..8f4f3e0 100644
> > --- a/drivers/fpga/intel/pcie.c
> > +++ b/drivers/fpga/intel/pcie.c
> > @@ -28,6 +28,7 @@
> > #include <linux/uuid.h>
> > #include <linux/kdev_t.h>
> > #include <linux/mfd/core.h>
> > +#include <linux/mtd/altera-asmip2.h>
> >
> > #include "feature-dev.h"
> >
> > @@ -617,6 +618,12 @@ static struct feature_info fme_features[] = {
> > .resource_size = sizeof(struct feature_fme_pr),
> > .feature_index = FME_FEATURE_ID_PR_MGMT,
> > .revision_id = FME_PR_MGMT_REVISION
> > + },
> > + {
> > + .name = FME_FEATURE_QSPI_FLASH,
> > + .resource_size = ALTERA_ASMIP2_RESOURCE_SIZE,
> > + .feature_index = FME_FEATURE_ID_QSPI_FLASH,
> > + .revision_id = FME_QSPI_REVISION
> > }
> > };
> >
> > diff --git a/drivers/fpga/intel/pcie_check.c b/drivers/fpga/intel/pcie_check.c
> > index e707d72..f0027e1 100644
> > --- a/drivers/fpga/intel/pcie_check.c
> > +++ b/drivers/fpga/intel/pcie_check.c
> > @@ -51,6 +51,11 @@
> > #define FME_FEATURE_PR_MGMT_ID 0x5
> > #define FME_FEATURE_PR_MGMT_VERSION 0x0
> >
> > +#define FME_FEATURE_QSPI_FLASH_TYPE DFH_TYPE_PRIVATE
> > +#define FME_FEATURE_QSPI_FLASH_NEXT_OFFSET 0x2000
> > +#define FME_FEATURE_QSPI_FLASH_ID
> FME_FEATURE_ID_QSPI_FLASH
> > +#define FME_FEATURE_QSPI_FLASH_VERSION FME_QSPI_REVISION
> > +
> > #define PORT_FEATURE_HEADER_TYPE DFH_TYPE_AFU
> > #define PORT_FEATURE_HEADER_NEXT_OFFSET 0x1000
> > #define PORT_FEATURE_HEADER_ID DFH_CCI_VERSION
> > @@ -91,6 +96,7 @@ static struct feature_header default_fme_feature_hdr[]
> = {
> > DEFAULT_REG(FME_FEATURE_GLOBAL_PERF),
> > DEFAULT_REG(FME_FEATURE_GLOBAL_ERR),
> > DEFAULT_REG(FME_FEATURE_PR_MGMT),
> > + DEFAULT_REG(FME_FEATURE_QSPI_FLASH),
> > };
> >
> > void check_features_header(struct pci_dev *pdev, struct feature_header *hdr,
> > --
> > 2.7.4
> >
> > --
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