From 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 13 May 2024 10:30:14 +0000
Subject: [PATCH] modify sin led gpio
---
kernel/drivers/fpga/dfl-afu-main.c | 458 +++++++++++++++++++++++++++++++++++++++++++++++++-------
1 files changed, 398 insertions(+), 60 deletions(-)
diff --git a/kernel/drivers/fpga/dfl-afu-main.c b/kernel/drivers/fpga/dfl-afu-main.c
index fc048f9..753cda4 100644
--- a/kernel/drivers/fpga/dfl-afu-main.c
+++ b/kernel/drivers/fpga/dfl-afu-main.c
@@ -22,14 +22,17 @@
#include "dfl-afu.h"
/**
- * port_enable - enable a port
+ * __afu_port_enable - enable a port by clear reset
* @pdev: port platform device.
*
* Enable Port by clear the port soft reset bit, which is set by default.
* The AFU is unable to respond to any MMIO access while in reset.
- * port_enable function should only be used after port_disable function.
+ * __afu_port_enable function should only be used after __afu_port_disable
+ * function.
+ *
+ * The caller needs to hold lock for protection.
*/
-static void port_enable(struct platform_device *pdev)
+void __afu_port_enable(struct platform_device *pdev)
{
struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
void __iomem *base;
@@ -52,13 +55,14 @@
#define RST_POLL_TIMEOUT 1000 /* us */
/**
- * port_disable - disable a port
+ * __afu_port_disable - disable a port by hold reset
* @pdev: port platform device.
*
- * Disable Port by setting the port soft reset bit, it puts the port into
- * reset.
+ * Disable Port by setting the port soft reset bit, it puts the port into reset.
+ *
+ * The caller needs to hold lock for protection.
*/
-static int port_disable(struct platform_device *pdev)
+int __afu_port_disable(struct platform_device *pdev)
{
struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
void __iomem *base;
@@ -105,9 +109,9 @@
{
int ret;
- ret = port_disable(pdev);
+ ret = __afu_port_disable(pdev);
if (!ret)
- port_enable(pdev);
+ __afu_port_enable(pdev);
return ret;
}
@@ -142,27 +146,267 @@
}
static DEVICE_ATTR_RO(id);
-static const struct attribute *port_hdr_attrs[] = {
+static ssize_t
+ltr_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct dfl_feature_platform_data *pdata = dev_get_platdata(dev);
+ void __iomem *base;
+ u64 v;
+
+ base = dfl_get_feature_ioaddr_by_id(dev, PORT_FEATURE_ID_HEADER);
+
+ mutex_lock(&pdata->lock);
+ v = readq(base + PORT_HDR_CTRL);
+ mutex_unlock(&pdata->lock);
+
+ return sprintf(buf, "%x\n", (u8)FIELD_GET(PORT_CTRL_LATENCY, v));
+}
+
+static ssize_t
+ltr_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct dfl_feature_platform_data *pdata = dev_get_platdata(dev);
+ void __iomem *base;
+ bool ltr;
+ u64 v;
+
+ if (kstrtobool(buf, <r))
+ return -EINVAL;
+
+ base = dfl_get_feature_ioaddr_by_id(dev, PORT_FEATURE_ID_HEADER);
+
+ mutex_lock(&pdata->lock);
+ v = readq(base + PORT_HDR_CTRL);
+ v &= ~PORT_CTRL_LATENCY;
+ v |= FIELD_PREP(PORT_CTRL_LATENCY, ltr ? 1 : 0);
+ writeq(v, base + PORT_HDR_CTRL);
+ mutex_unlock(&pdata->lock);
+
+ return count;
+}
+static DEVICE_ATTR_RW(ltr);
+
+static ssize_t
+ap1_event_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct dfl_feature_platform_data *pdata = dev_get_platdata(dev);
+ void __iomem *base;
+ u64 v;
+
+ base = dfl_get_feature_ioaddr_by_id(dev, PORT_FEATURE_ID_HEADER);
+
+ mutex_lock(&pdata->lock);
+ v = readq(base + PORT_HDR_STS);
+ mutex_unlock(&pdata->lock);
+
+ return sprintf(buf, "%x\n", (u8)FIELD_GET(PORT_STS_AP1_EVT, v));
+}
+
+static ssize_t
+ap1_event_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct dfl_feature_platform_data *pdata = dev_get_platdata(dev);
+ void __iomem *base;
+ bool clear;
+
+ if (kstrtobool(buf, &clear) || !clear)
+ return -EINVAL;
+
+ base = dfl_get_feature_ioaddr_by_id(dev, PORT_FEATURE_ID_HEADER);
+
+ mutex_lock(&pdata->lock);
+ writeq(PORT_STS_AP1_EVT, base + PORT_HDR_STS);
+ mutex_unlock(&pdata->lock);
+
+ return count;
+}
+static DEVICE_ATTR_RW(ap1_event);
+
+static ssize_t
+ap2_event_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct dfl_feature_platform_data *pdata = dev_get_platdata(dev);
+ void __iomem *base;
+ u64 v;
+
+ base = dfl_get_feature_ioaddr_by_id(dev, PORT_FEATURE_ID_HEADER);
+
+ mutex_lock(&pdata->lock);
+ v = readq(base + PORT_HDR_STS);
+ mutex_unlock(&pdata->lock);
+
+ return sprintf(buf, "%x\n", (u8)FIELD_GET(PORT_STS_AP2_EVT, v));
+}
+
+static ssize_t
+ap2_event_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct dfl_feature_platform_data *pdata = dev_get_platdata(dev);
+ void __iomem *base;
+ bool clear;
+
+ if (kstrtobool(buf, &clear) || !clear)
+ return -EINVAL;
+
+ base = dfl_get_feature_ioaddr_by_id(dev, PORT_FEATURE_ID_HEADER);
+
+ mutex_lock(&pdata->lock);
+ writeq(PORT_STS_AP2_EVT, base + PORT_HDR_STS);
+ mutex_unlock(&pdata->lock);
+
+ return count;
+}
+static DEVICE_ATTR_RW(ap2_event);
+
+static ssize_t
+power_state_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct dfl_feature_platform_data *pdata = dev_get_platdata(dev);
+ void __iomem *base;
+ u64 v;
+
+ base = dfl_get_feature_ioaddr_by_id(dev, PORT_FEATURE_ID_HEADER);
+
+ mutex_lock(&pdata->lock);
+ v = readq(base + PORT_HDR_STS);
+ mutex_unlock(&pdata->lock);
+
+ return sprintf(buf, "0x%x\n", (u8)FIELD_GET(PORT_STS_PWR_STATE, v));
+}
+static DEVICE_ATTR_RO(power_state);
+
+static ssize_t
+userclk_freqcmd_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct dfl_feature_platform_data *pdata = dev_get_platdata(dev);
+ u64 userclk_freq_cmd;
+ void __iomem *base;
+
+ if (kstrtou64(buf, 0, &userclk_freq_cmd))
+ return -EINVAL;
+
+ base = dfl_get_feature_ioaddr_by_id(dev, PORT_FEATURE_ID_HEADER);
+
+ mutex_lock(&pdata->lock);
+ writeq(userclk_freq_cmd, base + PORT_HDR_USRCLK_CMD0);
+ mutex_unlock(&pdata->lock);
+
+ return count;
+}
+static DEVICE_ATTR_WO(userclk_freqcmd);
+
+static ssize_t
+userclk_freqcntrcmd_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct dfl_feature_platform_data *pdata = dev_get_platdata(dev);
+ u64 userclk_freqcntr_cmd;
+ void __iomem *base;
+
+ if (kstrtou64(buf, 0, &userclk_freqcntr_cmd))
+ return -EINVAL;
+
+ base = dfl_get_feature_ioaddr_by_id(dev, PORT_FEATURE_ID_HEADER);
+
+ mutex_lock(&pdata->lock);
+ writeq(userclk_freqcntr_cmd, base + PORT_HDR_USRCLK_CMD1);
+ mutex_unlock(&pdata->lock);
+
+ return count;
+}
+static DEVICE_ATTR_WO(userclk_freqcntrcmd);
+
+static ssize_t
+userclk_freqsts_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct dfl_feature_platform_data *pdata = dev_get_platdata(dev);
+ u64 userclk_freqsts;
+ void __iomem *base;
+
+ base = dfl_get_feature_ioaddr_by_id(dev, PORT_FEATURE_ID_HEADER);
+
+ mutex_lock(&pdata->lock);
+ userclk_freqsts = readq(base + PORT_HDR_USRCLK_STS0);
+ mutex_unlock(&pdata->lock);
+
+ return sprintf(buf, "0x%llx\n", (unsigned long long)userclk_freqsts);
+}
+static DEVICE_ATTR_RO(userclk_freqsts);
+
+static ssize_t
+userclk_freqcntrsts_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct dfl_feature_platform_data *pdata = dev_get_platdata(dev);
+ u64 userclk_freqcntrsts;
+ void __iomem *base;
+
+ base = dfl_get_feature_ioaddr_by_id(dev, PORT_FEATURE_ID_HEADER);
+
+ mutex_lock(&pdata->lock);
+ userclk_freqcntrsts = readq(base + PORT_HDR_USRCLK_STS1);
+ mutex_unlock(&pdata->lock);
+
+ return sprintf(buf, "0x%llx\n",
+ (unsigned long long)userclk_freqcntrsts);
+}
+static DEVICE_ATTR_RO(userclk_freqcntrsts);
+
+static struct attribute *port_hdr_attrs[] = {
&dev_attr_id.attr,
+ &dev_attr_ltr.attr,
+ &dev_attr_ap1_event.attr,
+ &dev_attr_ap2_event.attr,
+ &dev_attr_power_state.attr,
+ &dev_attr_userclk_freqcmd.attr,
+ &dev_attr_userclk_freqcntrcmd.attr,
+ &dev_attr_userclk_freqsts.attr,
+ &dev_attr_userclk_freqcntrsts.attr,
NULL,
+};
+
+static umode_t port_hdr_attrs_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
+{
+ struct device *dev = kobj_to_dev(kobj);
+ umode_t mode = attr->mode;
+ void __iomem *base;
+
+ base = dfl_get_feature_ioaddr_by_id(dev, PORT_FEATURE_ID_HEADER);
+
+ if (dfl_feature_revision(base) > 0) {
+ /*
+ * userclk sysfs interfaces are only visible in case port
+ * revision is 0, as hardware with revision >0 doesn't
+ * support this.
+ */
+ if (attr == &dev_attr_userclk_freqcmd.attr ||
+ attr == &dev_attr_userclk_freqcntrcmd.attr ||
+ attr == &dev_attr_userclk_freqsts.attr ||
+ attr == &dev_attr_userclk_freqcntrsts.attr)
+ mode = 0;
+ }
+
+ return mode;
+}
+
+static const struct attribute_group port_hdr_group = {
+ .attrs = port_hdr_attrs,
+ .is_visible = port_hdr_attrs_visible,
};
static int port_hdr_init(struct platform_device *pdev,
struct dfl_feature *feature)
{
- dev_dbg(&pdev->dev, "PORT HDR Init.\n");
-
port_reset(pdev);
- return sysfs_create_files(&pdev->dev.kobj, port_hdr_attrs);
-}
-
-static void port_hdr_uinit(struct platform_device *pdev,
- struct dfl_feature *feature)
-{
- dev_dbg(&pdev->dev, "PORT HDR UInit.\n");
-
- sysfs_remove_files(&pdev->dev.kobj, port_hdr_attrs);
+ return 0;
}
static long
@@ -186,9 +430,13 @@
return ret;
}
+static const struct dfl_feature_id port_hdr_id_table[] = {
+ {.id = PORT_FEATURE_ID_HEADER,},
+ {0,}
+};
+
static const struct dfl_feature_ops port_hdr_ops = {
.init = port_hdr_init,
- .uinit = port_hdr_uinit,
.ioctl = port_hdr_ioctl,
};
@@ -215,50 +463,117 @@
}
static DEVICE_ATTR_RO(afu_id);
-static const struct attribute *port_afu_attrs[] = {
+static struct attribute *port_afu_attrs[] = {
&dev_attr_afu_id.attr,
NULL
+};
+
+static umode_t port_afu_attrs_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
+{
+ struct device *dev = kobj_to_dev(kobj);
+
+ /*
+ * sysfs entries are visible only if related private feature is
+ * enumerated.
+ */
+ if (!dfl_get_feature_by_id(dev, PORT_FEATURE_ID_AFU))
+ return 0;
+
+ return attr->mode;
+}
+
+static const struct attribute_group port_afu_group = {
+ .attrs = port_afu_attrs,
+ .is_visible = port_afu_attrs_visible,
};
static int port_afu_init(struct platform_device *pdev,
struct dfl_feature *feature)
{
struct resource *res = &pdev->resource[feature->resource_index];
- int ret;
- dev_dbg(&pdev->dev, "PORT AFU Init.\n");
-
- ret = afu_mmio_region_add(dev_get_platdata(&pdev->dev),
- DFL_PORT_REGION_INDEX_AFU, resource_size(res),
- res->start, DFL_PORT_REGION_READ |
- DFL_PORT_REGION_WRITE | DFL_PORT_REGION_MMAP);
- if (ret)
- return ret;
-
- return sysfs_create_files(&pdev->dev.kobj, port_afu_attrs);
+ return afu_mmio_region_add(dev_get_platdata(&pdev->dev),
+ DFL_PORT_REGION_INDEX_AFU,
+ resource_size(res), res->start,
+ DFL_PORT_REGION_MMAP | DFL_PORT_REGION_READ |
+ DFL_PORT_REGION_WRITE);
}
-static void port_afu_uinit(struct platform_device *pdev,
- struct dfl_feature *feature)
-{
- dev_dbg(&pdev->dev, "PORT AFU UInit.\n");
-
- sysfs_remove_files(&pdev->dev.kobj, port_afu_attrs);
-}
+static const struct dfl_feature_id port_afu_id_table[] = {
+ {.id = PORT_FEATURE_ID_AFU,},
+ {0,}
+};
static const struct dfl_feature_ops port_afu_ops = {
.init = port_afu_init,
- .uinit = port_afu_uinit,
+};
+
+static int port_stp_init(struct platform_device *pdev,
+ struct dfl_feature *feature)
+{
+ struct resource *res = &pdev->resource[feature->resource_index];
+
+ return afu_mmio_region_add(dev_get_platdata(&pdev->dev),
+ DFL_PORT_REGION_INDEX_STP,
+ resource_size(res), res->start,
+ DFL_PORT_REGION_MMAP | DFL_PORT_REGION_READ |
+ DFL_PORT_REGION_WRITE);
+}
+
+static const struct dfl_feature_id port_stp_id_table[] = {
+ {.id = PORT_FEATURE_ID_STP,},
+ {0,}
+};
+
+static const struct dfl_feature_ops port_stp_ops = {
+ .init = port_stp_init,
+};
+
+static long
+port_uint_ioctl(struct platform_device *pdev, struct dfl_feature *feature,
+ unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case DFL_FPGA_PORT_UINT_GET_IRQ_NUM:
+ return dfl_feature_ioctl_get_num_irqs(pdev, feature, arg);
+ case DFL_FPGA_PORT_UINT_SET_IRQ:
+ return dfl_feature_ioctl_set_irq(pdev, feature, arg);
+ default:
+ dev_dbg(&pdev->dev, "%x cmd not handled", cmd);
+ return -ENODEV;
+ }
+}
+
+static const struct dfl_feature_id port_uint_id_table[] = {
+ {.id = PORT_FEATURE_ID_UINT,},
+ {0,}
+};
+
+static const struct dfl_feature_ops port_uint_ops = {
+ .ioctl = port_uint_ioctl,
};
static struct dfl_feature_driver port_feature_drvs[] = {
{
- .id = PORT_FEATURE_ID_HEADER,
+ .id_table = port_hdr_id_table,
.ops = &port_hdr_ops,
},
{
- .id = PORT_FEATURE_ID_AFU,
+ .id_table = port_afu_id_table,
.ops = &port_afu_ops,
+ },
+ {
+ .id_table = port_err_id_table,
+ .ops = &port_err_ops,
+ },
+ {
+ .id_table = port_stp_id_table,
+ .ops = &port_stp_ops,
+ },
+ {
+ .id_table = port_uint_id_table,
+ .ops = &port_uint_ops,
},
{
.ops = NULL,
@@ -275,31 +590,39 @@
if (WARN_ON(!pdata))
return -ENODEV;
- ret = dfl_feature_dev_use_begin(pdata);
- if (ret)
- return ret;
+ mutex_lock(&pdata->lock);
+ ret = dfl_feature_dev_use_begin(pdata, filp->f_flags & O_EXCL);
+ if (!ret) {
+ dev_dbg(&fdev->dev, "Device File Opened %d Times\n",
+ dfl_feature_dev_use_count(pdata));
+ filp->private_data = fdev;
+ }
+ mutex_unlock(&pdata->lock);
- dev_dbg(&fdev->dev, "Device File Open\n");
- filp->private_data = fdev;
-
- return 0;
+ return ret;
}
static int afu_release(struct inode *inode, struct file *filp)
{
struct platform_device *pdev = filp->private_data;
struct dfl_feature_platform_data *pdata;
+ struct dfl_feature *feature;
dev_dbg(&pdev->dev, "Device File Release\n");
pdata = dev_get_platdata(&pdev->dev);
mutex_lock(&pdata->lock);
- __port_reset(pdev);
- afu_dma_region_destroy(pdata);
- mutex_unlock(&pdata->lock);
-
dfl_feature_dev_use_end(pdata);
+
+ if (!dfl_feature_dev_use_count(pdata)) {
+ dfl_fpga_dev_for_each_feature(pdata, feature)
+ dfl_fpga_set_irq_triggers(feature, 0,
+ feature->nr_irqs, NULL);
+ __port_reset(pdev);
+ afu_dma_region_destroy(pdata);
+ }
+ mutex_unlock(&pdata->lock);
return 0;
}
@@ -460,6 +783,12 @@
return -EINVAL;
}
+static const struct vm_operations_struct afu_vma_ops = {
+#ifdef CONFIG_HAVE_IOREMAP_PROT
+ .access = generic_access_phys,
+#endif
+};
+
static int afu_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct platform_device *pdev = filp->private_data;
@@ -488,6 +817,9 @@
if ((vma->vm_flags & VM_WRITE) &&
!(region.flags & DFL_PORT_REGION_WRITE))
return -EPERM;
+
+ /* Support debug access to the mapping */
+ vma->vm_ops = &afu_vma_ops;
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
@@ -527,10 +859,8 @@
static int afu_dev_destroy(struct platform_device *pdev)
{
struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
- struct dfl_afu *afu;
mutex_lock(&pdata->lock);
- afu = dfl_fpga_pdata_get_private(pdata);
afu_mmio_region_destroy(pdata);
afu_dma_region_destroy(pdata);
dfl_fpga_pdata_set_private(pdata, NULL);
@@ -546,9 +876,9 @@
mutex_lock(&pdata->lock);
if (enable)
- port_enable(pdev);
+ __afu_port_enable(pdev);
else
- ret = port_disable(pdev);
+ ret = __afu_port_disable(pdev);
mutex_unlock(&pdata->lock);
return ret;
@@ -600,9 +930,17 @@
return 0;
}
+static const struct attribute_group *afu_dev_groups[] = {
+ &port_hdr_group,
+ &port_afu_group,
+ &port_err_group,
+ NULL
+};
+
static struct platform_driver afu_driver = {
.driver = {
- .name = DFL_FPGA_FEATURE_DEV_PORT,
+ .name = DFL_FPGA_FEATURE_DEV_PORT,
+ .dev_groups = afu_dev_groups,
},
.probe = afu_probe,
.remove = afu_remove,
--
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