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Date: Tue, 26 Jun 2012 17:53:33 -0700
From: "Michael Chan" <mchan@...adcom.com>
To: davem@...emloft.net
cc: netdev@...r.kernel.org, nsujir@...adcom.com
Subject: [PATCH v2 -next 2/4] tg3: Add APE scratchpad read and write
functions.
From: Matt Carlson <mcarlson@...adcom.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 | 137 +++++++++++++++++++++++++++++++++++
drivers/net/ethernet/broadcom/tg3.h | 10 ++-
2 files changed, 145 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index 7c515db..693a584 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -751,6 +751,143 @@ static int tg3_ape_event_lock(struct tg3 *tp, u32 timeout_us)
return timeout_us ? 0 : -EBUSY;
}
+static int tg3_ape_wait_for_event(struct tg3 *tp, u32 timeout_us)
+{
+ u32 i, apedata;
+
+ for (i = 0; i < timeout_us / 10; i++) {
+ apedata = tg3_ape_read32(tp, TG3_APE_EVENT_STATUS);
+
+ if (!(apedata & APE_EVENT_STATUS_EVENT_PENDING))
+ break;
+
+ udelay(10);
+ }
+
+ return i == timeout_us / 10;
+}
+
+int tg3_ape_scratchpad_read(struct tg3 *tp, u32 *data, u32 base_off, u32 len)
+{
+ int err;
+ u32 i, bufoff, msgoff, maxlen, apedata;
+
+ if (!tg3_flag(tp, APE_HAS_NCSI))
+ return 0;
+
+ apedata = tg3_ape_read32(tp, TG3_APE_SEG_SIG);
+ if (apedata != APE_SEG_SIG_MAGIC)
+ return -ENODEV;
+
+ apedata = tg3_ape_read32(tp, TG3_APE_FW_STATUS);
+ if (!(apedata & APE_FW_STATUS_READY))
+ return -EAGAIN;
+
+ bufoff = tg3_ape_read32(tp, TG3_APE_SEG_MSG_BUF_OFF) +
+ TG3_APE_SHMEM_BASE;
+ msgoff = bufoff + 2 * sizeof(u32);
+ maxlen = tg3_ape_read32(tp, TG3_APE_SEG_MSG_BUF_LEN);
+
+ while (len) {
+ u32 length;
+
+ /* Cap xfer sizes to scratchpad limits. */
+ length = (len > maxlen) ? maxlen : len;
+ len -= length;
+
+ apedata = tg3_ape_read32(tp, TG3_APE_FW_STATUS);
+ if (!(apedata & APE_FW_STATUS_READY))
+ return -EAGAIN;
+
+ /* Wait for up to 1 msec for APE to service previous event. */
+ err = tg3_ape_event_lock(tp, 1000);
+ if (err)
+ return err;
+
+ apedata = APE_EVENT_STATUS_DRIVER_EVNT |
+ APE_EVENT_STATUS_SCRTCHPD_READ |
+ APE_EVENT_STATUS_EVENT_PENDING;
+ tg3_ape_write32(tp, TG3_APE_EVENT_STATUS, apedata);
+
+ tg3_ape_write32(tp, bufoff, base_off);
+ tg3_ape_write32(tp, bufoff + sizeof(u32), length);
+
+ tg3_ape_unlock(tp, TG3_APE_LOCK_MEM);
+ tg3_ape_write32(tp, TG3_APE_EVENT, APE_EVENT_1);
+
+ base_off += length;
+
+ if (tg3_ape_wait_for_event(tp, 30000))
+ return -EAGAIN;
+
+ for (i = 0; length; i += 4, length -= 4) {
+ u32 val = tg3_ape_read32(tp, msgoff + i);
+ memcpy(data, &val, sizeof(u32));
+ data++;
+ }
+ }
+
+ return 0;
+}
+
+int tg3_ape_scratchpad_write(struct tg3 *tp, u32 dstoff, u32 *data, u32 len)
+{
+ u32 i, bufoff, msgoff, maxlen, apedata;
+
+ if (!tg3_flag(tp, APE_HAS_NCSI))
+ return 0;
+
+ apedata = tg3_ape_read32(tp, TG3_APE_SEG_SIG);
+ if (apedata != APE_SEG_SIG_MAGIC)
+ return -ENODEV;
+
+ apedata = tg3_ape_read32(tp, TG3_APE_FW_STATUS);
+ if (!(apedata & APE_FW_STATUS_READY))
+ return -EAGAIN;
+
+ bufoff = tg3_ape_read32(tp, TG3_APE_SEG_MSG_BUF_OFF) +
+ TG3_APE_SHMEM_BASE;
+ msgoff = bufoff + 2 * sizeof(u32);
+ maxlen = tg3_ape_read32(tp, TG3_APE_SEG_MSG_BUF_LEN);
+
+ while (len) {
+ int err;
+ u32 length;
+
+ /* Cap xfer sizes to scratchpad limits. */
+ length = (len > maxlen) ? maxlen : len;
+ len -= length;
+
+ /* Wait for up to 1 millisecond for
+ * APE to service previous event.
+ */
+ err = tg3_ape_event_lock(tp, 1000);
+ if (err)
+ return err;
+
+ tg3_ape_write32(tp, bufoff, dstoff);
+ tg3_ape_write32(tp, bufoff + sizeof(u32), length);
+ apedata = msgoff;
+
+ dstoff += length;
+
+ for (i = 0; length; i += 4, length -= sizeof(u32)) {
+ tg3_ape_write32(tp, apedata, *data++);
+ apedata += sizeof(u32);
+ }
+
+ apedata = APE_EVENT_STATUS_DRIVER_EVNT |
+ APE_EVENT_STATUS_SCRTCHPD_WRITE |
+ APE_EVENT_STATUS_EVENT_PENDING;
+ tg3_ape_write32(tp, TG3_APE_EVENT_STATUS, apedata);
+
+ tg3_ape_unlock(tp, TG3_APE_LOCK_MEM);
+ tg3_ape_write32(tp, TG3_APE_EVENT, APE_EVENT_1);
+ }
+
+ return 0;
+}
+
static int tg3_ape_send_event(struct tg3 *tp, u32 event)
{
int err;
diff --git a/drivers/net/ethernet/broadcom/tg3.h b/drivers/net/ethernet/broadcom/tg3.h
index 93865f8..d167a1c 100644
--- a/drivers/net/ethernet/broadcom/tg3.h
+++ b/drivers/net/ethernet/broadcom/tg3.h
@@ -2311,10 +2311,12 @@
#define APE_LOCK_REQ_DRIVER 0x00001000
#define TG3_APE_LOCK_GRANT 0x004c
#define APE_LOCK_GRANT_DRIVER 0x00001000
-#define TG3_APE_SEG_SIG 0x4000
-#define APE_SEG_SIG_MAGIC 0x41504521
+#define TG3_APE_STICKY_TMR 0x00b0
/* APE shared memory. Accessible through BAR1 */
+#define TG3_APE_SHMEM_BASE 0x4000
+#define TG3_APE_SEG_SIG 0x4000
+#define APE_SEG_SIG_MAGIC 0x41504521
#define TG3_APE_FW_STATUS 0x400c
#define APE_FW_STATUS_READY 0x00000100
#define TG3_APE_FW_FEATURES 0x4010
@@ -2327,6 +2329,8 @@
#define APE_FW_VERSION_REVMSK 0x0000ff00
#define APE_FW_VERSION_REVSFT 8
#define APE_FW_VERSION_BLDMSK 0x000000ff
+#define TG3_APE_SEG_MSG_BUF_OFF 0x401c
+#define TG3_APE_SEG_MSG_BUF_LEN 0x4020
#define TG3_APE_HOST_SEG_SIG 0x4200
#define APE_HOST_SEG_SIG_MAGIC 0x484f5354
#define TG3_APE_HOST_SEG_LEN 0x4204
@@ -2353,6 +2357,8 @@
#define APE_EVENT_STATUS_DRIVER_EVNT 0x00000010
#define APE_EVENT_STATUS_STATE_CHNGE 0x00000500
+#define APE_EVENT_STATUS_SCRTCHPD_READ 0x00001600
+#define APE_EVENT_STATUS_SCRTCHPD_WRITE 0x00001700
#define APE_EVENT_STATUS_STATE_START 0x00010000
#define APE_EVENT_STATUS_STATE_UNLOAD 0x00020000
#define APE_EVENT_STATUS_STATE_WOL 0x00030000
--
1.7.1
--
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