#include <linux/device.h>
#include <linux/ethtool.h>
+#include <linux/ethtool_netlink.h>
#include <linux/of.h>
+#include <linux/phy.h>
#include <linux/pse-pd/pse.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
+#include <linux/rtnetlink.h>
+#include <net/net_trackers.h>
static DEFINE_MUTEX(pse_list_mutex);
static LIST_HEAD(pse_controller_list);
return ret;
}
+/**
+ * pse_control_find_net_by_id - Find net attached to the pse control id
+ * @pcdev: a pointer to the PSE
+ * @id: index of the PSE control
+ *
+ * Return: pse_control pointer or NULL. The device returned has had a
+ * reference added and the pointer is safe until the user calls
+ * pse_control_put() to indicate they have finished with it.
+ */
+static struct pse_control *
+pse_control_find_by_id(struct pse_controller_dev *pcdev, int id)
+{
+ struct pse_control *psec;
+
+ mutex_lock(&pse_list_mutex);
+ list_for_each_entry(psec, &pcdev->pse_control_head, list) {
+ if (psec->id == id) {
+ kref_get(&psec->refcnt);
+ mutex_unlock(&pse_list_mutex);
+ return psec;
+ }
+ }
+ mutex_unlock(&pse_list_mutex);
+ return NULL;
+}
+
+/**
+ * pse_control_get_netdev - Return netdev associated to a PSE control
+ * @psec: PSE control pointer
+ *
+ * Return: netdev pointer or NULL
+ */
+static struct net_device *pse_control_get_netdev(struct pse_control *psec)
+{
+ ASSERT_RTNL();
+
+ if (!psec || !psec->attached_phydev)
+ return NULL;
+
+ return psec->attached_phydev->attached_dev;
+}
+
static int pse_pi_is_enabled(struct regulator_dev *rdev)
{
struct pse_controller_dev *pcdev = rdev_get_drvdata(rdev);
}
EXPORT_SYMBOL_GPL(devm_pse_controller_register);
+struct pse_irq {
+ struct pse_controller_dev *pcdev;
+ struct pse_irq_desc desc;
+ unsigned long *notifs;
+};
+
+/**
+ * pse_to_regulator_notifs - Convert PSE notifications to Regulator
+ * notifications
+ * @notifs: PSE notifications
+ *
+ * Return: Regulator notifications
+ */
+static unsigned long pse_to_regulator_notifs(unsigned long notifs)
+{
+ unsigned long rnotifs = 0;
+
+ if (notifs & ETHTOOL_PSE_EVENT_OVER_CURRENT)
+ rnotifs |= REGULATOR_EVENT_OVER_CURRENT;
+ if (notifs & ETHTOOL_PSE_EVENT_OVER_TEMP)
+ rnotifs |= REGULATOR_EVENT_OVER_TEMP;
+
+ return rnotifs;
+}
+
+/**
+ * pse_isr - IRQ handler for PSE
+ * @irq: irq number
+ * @data: pointer to user interrupt structure
+ *
+ * Return: irqreturn_t - status of IRQ
+ */
+static irqreturn_t pse_isr(int irq, void *data)
+{
+ struct pse_controller_dev *pcdev;
+ unsigned long notifs_mask = 0;
+ struct pse_irq_desc *desc;
+ struct pse_irq *h = data;
+ int ret, i;
+
+ desc = &h->desc;
+ pcdev = h->pcdev;
+
+ /* Clear notifs mask */
+ memset(h->notifs, 0, pcdev->nr_lines * sizeof(*h->notifs));
+ mutex_lock(&pcdev->lock);
+ ret = desc->map_event(irq, pcdev, h->notifs, ¬ifs_mask);
+ mutex_unlock(&pcdev->lock);
+ if (ret || !notifs_mask)
+ return IRQ_NONE;
+
+ for_each_set_bit(i, ¬ifs_mask, pcdev->nr_lines) {
+ unsigned long notifs, rnotifs;
+ struct net_device *netdev;
+ struct pse_control *psec;
+
+ /* Do nothing PI not described */
+ if (!pcdev->pi[i].rdev)
+ continue;
+
+ notifs = h->notifs[i];
+ dev_dbg(h->pcdev->dev,
+ "Sending PSE notification EVT 0x%lx\n", notifs);
+
+ psec = pse_control_find_by_id(pcdev, i);
+ rtnl_lock();
+ netdev = pse_control_get_netdev(psec);
+ if (netdev)
+ ethnl_pse_send_ntf(netdev, notifs);
+ rtnl_unlock();
+ pse_control_put(psec);
+
+ rnotifs = pse_to_regulator_notifs(notifs);
+ regulator_notifier_call_chain(pcdev->pi[i].rdev, rnotifs,
+ NULL);
+ }
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * devm_pse_irq_helper - Register IRQ based PSE event notifier
+ * @pcdev: a pointer to the PSE
+ * @irq: the irq value to be passed to request_irq
+ * @irq_flags: the flags to be passed to request_irq
+ * @d: PSE interrupt description
+ *
+ * Return: 0 on success and errno on failure
+ */
+int devm_pse_irq_helper(struct pse_controller_dev *pcdev, int irq,
+ int irq_flags, const struct pse_irq_desc *d)
+{
+ struct device *dev = pcdev->dev;
+ size_t irq_name_len;
+ struct pse_irq *h;
+ char *irq_name;
+ int ret;
+
+ if (!d || !d->map_event || !d->name)
+ return -EINVAL;
+
+ h = devm_kzalloc(dev, sizeof(*h), GFP_KERNEL);
+ if (!h)
+ return -ENOMEM;
+
+ h->pcdev = pcdev;
+ h->desc = *d;
+
+ /* IRQ name len is pcdev dev name + 5 char + irq desc name + 1 */
+ irq_name_len = strlen(dev_name(pcdev->dev)) + 5 + strlen(d->name) + 1;
+ irq_name = devm_kzalloc(dev, irq_name_len, GFP_KERNEL);
+ if (!irq_name)
+ return -ENOMEM;
+
+ snprintf(irq_name, irq_name_len, "pse-%s:%s", dev_name(pcdev->dev),
+ d->name);
+
+ h->notifs = devm_kcalloc(dev, pcdev->nr_lines,
+ sizeof(*h->notifs), GFP_KERNEL);
+ if (!h->notifs)
+ return -ENOMEM;
+
+ ret = devm_request_threaded_irq(dev, irq, NULL, pse_isr,
+ IRQF_ONESHOT | irq_flags,
+ irq_name, h);
+ if (ret)
+ dev_err(pcdev->dev, "Failed to request IRQ %d\n", irq);
+
+ pcdev->irq = irq;
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devm_pse_irq_helper);
+
/* PSE control section */
static void __pse_control_release(struct kref *kref)
#include <linux/list.h>
#include <uapi/linux/ethtool.h>
+#include <uapi/linux/ethtool_netlink_generated.h>
+#include <linux/regulator/driver.h>
/* Maximum current in uA according to IEEE 802.3-2022 Table 145-1 */
#define MAX_PI_CURRENT 1920000
/* Maximum power in mW according to IEEE 802.3-2022 Table 145-16 */
#define MAX_PI_PW 99900
+struct net_device;
struct phy_device;
struct pse_controller_dev;
struct netlink_ext_ack;
u32 max;
};
+/**
+ * struct pse_irq_desc - notification sender description for IRQ based events.
+ *
+ * @name: the visible name for the IRQ
+ * @map_event: driver callback to map IRQ status into PSE devices with events.
+ */
+struct pse_irq_desc {
+ const char *name;
+ int (*map_event)(int irq, struct pse_controller_dev *pcdev,
+ unsigned long *notifs,
+ unsigned long *notifs_mask);
+};
+
/**
* struct pse_control_config - PSE control/channel configuration.
*
* @types: types of the PSE controller
* @pi: table of PSE PIs described in this controller device
* @no_of_pse_pi: flag set if the pse_pis devicetree node is not used
+ * @irq: PSE interrupt
*/
struct pse_controller_dev {
const struct pse_controller_ops *ops;
enum ethtool_pse_types types;
struct pse_pi *pi;
bool no_of_pse_pi;
+ int irq;
};
#if IS_ENABLED(CONFIG_PSE_CONTROLLER)
struct device;
int devm_pse_controller_register(struct device *dev,
struct pse_controller_dev *pcdev);
+int devm_pse_irq_helper(struct pse_controller_dev *pcdev, int irq,
+ int irq_flags, const struct pse_irq_desc *d);
struct pse_control *of_pse_control_get(struct device_node *node,
struct phy_device *phydev);
HWTSTAMP_SOURCE_PHYLIB,
};
+/**
+ * enum ethtool_pse_event - PSE event list for the PSE controller
+ * @ETHTOOL_PSE_EVENT_OVER_CURRENT: PSE output current is too high
+ * @ETHTOOL_PSE_EVENT_OVER_TEMP: PSE in over temperature state
+ */
+enum ethtool_pse_event {
+ ETHTOOL_PSE_EVENT_OVER_CURRENT = 1,
+ ETHTOOL_PSE_EVENT_OVER_TEMP = 2,
+};
+
enum {
ETHTOOL_A_HEADER_UNSPEC,
ETHTOOL_A_HEADER_DEV_INDEX,
ETHTOOL_A_TSCONFIG_MAX = (__ETHTOOL_A_TSCONFIG_CNT - 1)
};
+enum {
+ ETHTOOL_A_PSE_NTF_HEADER = 1,
+ ETHTOOL_A_PSE_NTF_EVENTS,
+
+ __ETHTOOL_A_PSE_NTF_CNT,
+ ETHTOOL_A_PSE_NTF_MAX = (__ETHTOOL_A_PSE_NTF_CNT - 1)
+};
+
enum {
ETHTOOL_MSG_USER_NONE = 0,
ETHTOOL_MSG_STRSET_GET = 1,
ETHTOOL_MSG_PHY_NTF,
ETHTOOL_MSG_TSCONFIG_GET_REPLY,
ETHTOOL_MSG_TSCONFIG_SET_REPLY,
+ ETHTOOL_MSG_PSE_NTF,
__ETHTOOL_MSG_KERNEL_CNT,
ETHTOOL_MSG_KERNEL_MAX = (__ETHTOOL_MSG_KERNEL_CNT - 1)
projects / users / dwmw2 / linux.git / commitdiff