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Date: Tue, 26 Jun 2012 17:53:35 -0700
From: "Michael Chan" <mchan@...adcom.com>
To: davem@...emloft.net
cc: netdev@...r.kernel.org, nsujir@...adcom.com
Subject: [PATCH v2 -next 4/4] tg3: Add binary sysfs file to export bulk
sensor data
The bulk of the sensor data is exported as binary data to sysfs for
userspace access.
[binary sysfs suggested by Ben Hutchings <bhutchings@...arflare.com>]
Signed-off-by: Matt Carlson <mcarlson@...adcom.com>
Signed-off-by: Nithin Nayak Sujir <nsujir@...adcom.com>
Signed-off-by: Michael Chan <mchan@...adcom.com>
---
drivers/net/ethernet/broadcom/tg3.c | 130 ++++++++++++++++++++++++++++++++++-
1 files changed, 129 insertions(+), 1 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index 6b51e3a..109a7cb 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -9542,6 +9542,48 @@ static int tg3_init_hw(struct tg3 *tp, int reset_phy)
return tg3_reset_hw(tp, reset_phy);
}
+static void tg3_sd_xfer(struct tg3 *tp, u32 off, u32 size)
+{
+ struct tg3_sd *sd = tp->sd;
+
+ if (!size)
+ return;
+
+ tg3_ape_scratchpad_read(tp, (u32 *) &sd->buf[off], off, size);
+}
+
+static void tg3_sd_update_host(struct tg3 *tp, struct tg3_sd_record *rec)
+{
+ tg3_sd_xfer(tp, rec->data_off, rec->data_len);
+ tg3_sd_xfer(tp, rec->hdr_off, rec->hdr_len);
+}
+
+static void tg3_sd_update_drvflags(struct tg3 *tp, bool unloading)
+{
+ struct tg3_sd *sd = tp->sd;
+ u32 flags;
+
+ if (!sd || !sd->sd_flags_off)
+ return;
+
+ tg3_ape_scratchpad_read(tp, &flags, sd->sd_flags_off, 4);
+
+ flags &= ~TG3_OCIR_DRVR_FEAT_MASK;
+
+ if (!unloading) {
+ u32 mask = NETIF_F_RXCSUM | NETIF_F_IP_CSUM |
+ NETIF_F_IPV6_CSUM | NETIF_F_HW_CSUM;
+
+ if (tp->dev->features & mask)
+ flags |= TG3_OCIR_DRVR_FEAT_CSUM;
+
+ if (tp->dev->features & NETIF_F_ALL_TSO)
+ flags |= TG3_OCIR_DRVR_FEAT_TSO;
+ }
+
+ tg3_ape_scratchpad_write(tp, sd->sd_flags_off, &flags, 4);
+}
+
static void tg3_sd_scan_scratchpad(struct tg3 *tp, struct tg3_ocir *ocir)
{
int i;
@@ -9610,6 +9652,32 @@ static void tg3_hwmon_open(struct tg3 *tp)
}
#endif
+static ssize_t tg3_sd_read(struct file *filep, struct kobject *kobj,
+ struct bin_attribute *attr, char *buff,
+ loff_t offset, size_t size)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct net_device *netdev = pci_get_drvdata(pdev);
+ struct tg3 *tp = netdev_priv(netdev);
+ struct tg3_sd *sd = tp->sd;
+ int len = size < sd->buf_size ? size : sd->buf_size;
+
+ if (offset > sd->buf_size)
+ return 0;
+
+ if (offset + len > sd->buf_size)
+ len = sd->buf_size - offset;
+
+ memcpy(buff, sd->buf + offset, len);
+ return len;
+}
+
+static struct bin_attribute bin_attr_tg3_sd = {
+ .attr = {.name = "tg3_sd", .mode = S_IRUSR},
+ .read = tg3_sd_read,
+};
+
static int tg3_sd_init(struct tg3 *tp)
{
int i;
@@ -9674,6 +9742,7 @@ static int tg3_sd_init(struct tg3 *tp)
sd->sd_flags_off = 2 * TG3_OCIR_LEN + (tp->pci_fn * sizeof(u32)) +
TG3_OCIR_PORT0_FLGS_OFF;
+ tg3_sd_update_drvflags(tp, false);
return 0;
}
@@ -9684,6 +9753,8 @@ static void tg3_sd_fini(struct tg3 *tp)
if (!sd)
return;
+ tg3_sd_update_drvflags(tp, true);
+
kfree(sd->buf);
kfree(sd);
tp->sd = NULL;
@@ -9703,6 +9774,7 @@ static void tg3_sd_close(struct tg3 *tp)
sysfs_remove_group(&tp->pdev->dev.kobj, &tg3_group);
}
#endif
+ device_remove_bin_file(&tp->pdev->dev, &bin_attr_tg3_sd);
}
static int tg3_sd_open(struct tg3 *tp)
@@ -9715,7 +9787,7 @@ static int tg3_sd_open(struct tg3 *tp)
#if IS_ENABLED(CONFIG_HWMON)
tg3_hwmon_open(tp);
#endif
- return 0;
+ return device_create_bin_file(&tp->pdev->dev, &bin_attr_tg3_sd);
}
#define TG3_STAT_ADD32(PSTAT, REG) \
@@ -9803,6 +9875,59 @@ static void tg3_chk_missed_msi(struct tg3 *tp)
}
}
+
+static void tg3_sd_timer(struct tg3 *tp)
+{
+ int i;
+ u32 val;
+ struct tg3_sd *sd = tp->sd;
+ struct tg3_ocir *ocirp = (struct tg3_ocir *) sd->buf;
+
+ if (!netif_running(tp->dev))
+ return;
+
+ for (i = 0; i < TG3_SD_NUM_RECS; i++, ocirp++) {
+ struct tg3_sd_record *rec = &sd->rec[i];
+
+ if (!rec->data_len)
+ continue;
+
+ tg3_ape_scratchpad_read(tp, &val, rec->utmr_off, 4);
+ /* Check if data has changed */
+ if (val) {
+
+ if (!rec->rtmr_int) {
+ tg3_sd_update_host(tp, rec);
+
+ rec->updated_seq++;
+ ocirp->update_tmr = rec->updated_seq;
+ } else {
+ u32 curr;
+ unsigned long tgt;
+
+ curr = tg3_ape_read32(tp, TG3_APE_STICKY_TMR);
+ tgt = rec->rtmr_val + rec->rtmr_int;
+ if (time_after((unsigned long) curr, tgt)) {
+ tg3_sd_update_host(tp, rec);
+
+ rec->rtmr_val = curr;
+ tg3_ape_scratchpad_write(tp,
+ rec->rtmr_off,
+ &curr, 4);
+
+ rec->updated_seq++;
+ ocirp->update_tmr = rec->updated_seq;
+ }
+ }
+
+ val = 0;
+ if (tg3_ape_scratchpad_write(tp, rec->utmr_off,
+ &val, 4))
+ netdev_err(tp->dev, "write scratchpad error\n");
+ }
+ }
+}
+
static void tg3_timer(unsigned long __opaque)
{
struct tg3 *tp = (struct tg3 *) __opaque;
@@ -9841,6 +9966,9 @@ static void tg3_timer(unsigned long __opaque)
if (tg3_flag(tp, 5705_PLUS))
tg3_periodic_fetch_stats(tp);
+ if (tp->sd)
+ tg3_sd_timer(tp);
+
if (tp->setlpicnt && !--tp->setlpicnt)
tg3_phy_eee_enable(tp);
--
1.7.1
--
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