[PATCH 12/44] leon, grspw_pkt: added link_ctrl options

[Daniel Hellstrom]

Improved the link error handling options. Its now possible to
disable the link on individual link errors/warnings instead of
always on all or none.

Changed name of LINKOPTS_IRQ to LINKOPTS_EIRQ to match Linux
and VxWorks SpW driver.
---
 c/src/lib/libbsp/sparc/shared/include/grspw_pkt.h | 25 ++++++++++++++++++++---
 c/src/lib/libbsp/sparc/shared/spw/grspw_pkt.c     | 17 +++++++++------
 2 files changed, 33 insertions(+), 9 deletions(-)

diff --git a/c/src/lib/libbsp/sparc/shared/include/grspw_pkt.h b/c/src/lib/libbsp/sparc/shared/include/grspw_pkt.h
index f16ec20..ea0ae9a 100644
--- a/c/src/lib/libbsp/sparc/shared/include/grspw_pkt.h
+++ b/c/src/lib/libbsp/sparc/shared/include/grspw_pkt.h
@@ -193,10 +193,29 @@ struct grspw_core_stats {
 #define LINKOPTS_DISABLE	0x0001
 #define LINKOPTS_START		0x0002
 #define LINKOPTS_AUTOSTART	0x0004
-#define LINKOPTS_DIS_ONERR	0x0008
+#define LINKOPTS_DIS_ONERR	0x0008	/* Disable DMA transmitter on link error
+					 * Controls LE bit in DMACTRL register.
+					 */
+#define LINKOPTS_DIS_ON_CE	0x0020000/* Disable Link on Credit error */
+#define LINKOPTS_DIS_ON_ER	0x0040000/* Disable Link on Escape error */
+#define LINKOPTS_DIS_ON_DE	0x0080000/* Disable Link on Disconnect error */
+#define LINKOPTS_DIS_ON_PE	0x0100000/* Disable Link on Parity error */
+#define LINKOPTS_DIS_ON_WE	0x0400000/* Disable Link on write synchonization
+					  * error (GRSPW1 only)
+					  */
+#define LINKOPTS_DIS_ON_EE	0x1000000/* Disable Link on Early EOP/EEP error*/
+
 /*#define LINKOPTS_TICK_OUT_IRQ	0x0100*//* Enable Tick-out IRQ */
-#define LINKOPTS_IRQ		0x0200	/* Enable Error Link IRQ */
-#define LINKOPTS_MASK		0x020f	/* All above options */
+#define LINKOPTS_EIRQ		0x0200	/* Enable Error Link IRQ */
+
+#define LINKOPTS_MASK		0x15e020f/* All above options */
+#define LINKOPTS_MASK_DIS_ON	0x15e0000/* All disable link on error options
+					  * On a certain error the link disable
+					  * bit will be written and the work
+					  * task will call dma_stop() for all
+					  * channels.
+					  */
+
 
 /* grspw_tc_ctrl() options */
 #define TCOPTS_EN_RXIRQ	0x0001	/* Tick-Out IRQ */
diff --git a/c/src/lib/libbsp/sparc/shared/spw/grspw_pkt.c b/c/src/lib/libbsp/sparc/shared/spw/grspw_pkt.c
index cee6dcc..1827fbd 100644
--- a/c/src/lib/libbsp/sparc/shared/spw/grspw_pkt.c
+++ b/c/src/lib/libbsp/sparc/shared/spw/grspw_pkt.c
@@ -469,8 +469,8 @@ struct grspw_priv {
 	spwpkt_ic_isr_t icisr;
 	void *icisr_arg;
 
-	/* Disable Link on SpW Link error */
-	int dis_link_on_err;
+	/* Bit mask representing events which shall cause link disable. */
+	unsigned int dis_link_on_err;
 
 	/* "Core Global" Statistics gathered, not dependent on DMA channel */
 	struct grspw_core_stats stats;
@@ -772,10 +772,15 @@ void grspw_link_ctrl(void *d, int *options, int *clkdiv)
 				ctrl &= ~GRSPW_CTRL_IE;
 
 			REG_WRITE(&regs->ctrl, ctrl);
-			priv->dis_link_on_err = (*options & LINKOPTS_DIS_ONERR) >> 3;
+			/* Store the link disable events for use in
+			ISR. The LINKOPTS_DIS_ON_* options are actually the
+			corresponding bits in the status register, shifted
+			by 16. */
+			priv->dis_link_on_err = *options &
+				(LINKOPTS_MASK_DIS_ON | LINKOPTS_DIS_ONERR);
 		}
 		SPIN_UNLOCK_IRQ(&priv->devlock, irqflags);
-		*options = (ctrl & GRSPW_LINK_CFG)|(priv->dis_link_on_err << 3);
+		*options = (ctrl & GRSPW_LINK_CFG) | priv->dis_link_on_err;
 	}
 }
 
@@ -2268,7 +2273,7 @@ int grspw_dma_start(void *c)
 	ctrl =  GRSPW_DMACTRL_AI | GRSPW_DMACTRL_PS | GRSPW_DMACTRL_PR |
 		GRSPW_DMACTRL_TA | GRSPW_DMACTRL_RA | GRSPW_DMACTRL_RE |
 		(dma->cfg.flags & DMAFLAG_MASK) << GRSPW_DMACTRL_NS_BIT;
-	if (dma->core->dis_link_on_err)
+	if (dma->core->dis_link_on_err & LINKOPTS_DIS_ONERR)
 		ctrl |= GRSPW_DMACTRL_LE;
 	if (dma->cfg.rx_irq_en_cnt != 0)
 		ctrl |= GRSPW_DMACTRL_RI;
@@ -2554,7 +2559,7 @@ STATIC void grspw_isr(void *data)
 		if (stat & GRSPW_STS_WE)
 			priv->stats.err_wsync++;
 
-		if (priv->dis_link_on_err) {
+		if ((priv->dis_link_on_err >> 16) & stat) {
 			/* Disable the link, no more transfers are expected
 			 * on any DMA channel.
 			 */
-- 
2.7.4