svn commit: r349466 - in head/sys: conf dev/altera/msgdma mips/conf

[Ruslan Bukin]

Author: br
Date: Thu Jun 27 18:08:18 2019
New Revision: 349466
URL: https://svnweb.freebsd.org/changeset/base/349466

Log:
  Add support for extended descriptor format to Altera mSGDMA driver.
  
  The format to use depends on hardware configuration (synthesis-time),
  so make it compile-time kernel option.
  
  Extended format allows DMA engine to operate with 64-bit memory addresses.
  
  Sponsored by:	DARPA, AFRL

Modified:
  head/sys/conf/options
  head/sys/dev/altera/msgdma/msgdma.c
  head/sys/dev/altera/msgdma/msgdma.h
  head/sys/mips/conf/BERI_DE4_BASE

Modified: head/sys/conf/options
==============================================================================
--- head/sys/conf/options	Thu Jun 27 17:59:15 2019	(r349465)
+++ head/sys/conf/options	Thu Jun 27 18:08:18 2019	(r349466)
@@ -861,6 +861,12 @@ AH_INTERRUPT_DEBUGGING	opt_ah.h
 # XXX do not use this for AR9130
 AH_AR5416_INTERRUPT_MITIGATION	opt_ah.h
 
+# options for the Altera mSGDMA driver (altera_msgdma)
+ALTERA_MSGDMA_DESC_STD		opt_altera_msgdma.h
+ALTERA_MSGDMA_DESC_EXT		opt_altera_msgdma.h
+ALTERA_MSGDMA_DESC_PF_STD	opt_altera_msgdma.h
+ALTERA_MSGDMA_DESC_PF_EXT	opt_altera_msgdma.h
+
 # options for the Broadcom BCM43xx driver (bwi)
 BWI_DEBUG		opt_bwi.h
 BWI_DEBUG_VERBOSE	opt_bwi.h

Modified: head/sys/dev/altera/msgdma/msgdma.c
==============================================================================
--- head/sys/dev/altera/msgdma/msgdma.c	Thu Jun 27 17:59:15 2019	(r349465)
+++ head/sys/dev/altera/msgdma/msgdma.c	Thu Jun 27 18:08:18 2019	(r349466)
@@ -60,6 +60,7 @@ __FBSDID("$FreeBSD$");
 
 #include <dev/xdma/xdma.h>
 #include "xdma_if.h"
+#include "opt_altera_msgdma.h"
 
 #include <dev/altera/msgdma/msgdma.h>
 
@@ -470,8 +471,8 @@ msgdma_channel_submit_sg(device_t dev, struct xdma_cha
 	struct msgdma_channel *chan;
 	struct msgdma_desc *desc;
 	struct msgdma_softc *sc;
-	uint32_t src_addr_lo;
-	uint32_t dst_addr_lo;
+	bus_addr_t src_addr_lo;
+	bus_addr_t dst_addr_lo;
 	uint32_t len;
 	uint32_t tmp;
 	int i;
@@ -481,14 +482,18 @@ msgdma_channel_submit_sg(device_t dev, struct xdma_cha
 	chan = (struct msgdma_channel *)xchan->chan;
 
 	for (i = 0; i < sg_n; i++) {
-		src_addr_lo = (uint32_t)sg[i].src_addr;
-		dst_addr_lo = (uint32_t)sg[i].dst_addr;
+		src_addr_lo = sg[i].src_addr;
+		dst_addr_lo = sg[i].dst_addr;
 		len = (uint32_t)sg[i].len;
 
 		dprintf("%s: src %x dst %x len %d\n", __func__,
 		    src_addr_lo, dst_addr_lo, len);
 
 		desc = chan->descs[chan->idx_head];
+#if defined(ALTERA_MSGDMA_DESC_EXT) || defined(ALTERA_MSGDMA_DESC_PF_EXT)
+		desc->read_hi = htole32(src_addr_lo >> 32);
+		desc->write_hi = htole32(dst_addr_lo >> 32);
+#endif
 		desc->read_lo = htole32(src_addr_lo);
 		desc->write_lo = htole32(dst_addr_lo);
 		desc->length = htole32(len);

Modified: head/sys/dev/altera/msgdma/msgdma.h
==============================================================================
--- head/sys/dev/altera/msgdma/msgdma.h	Thu Jun 27 17:59:15 2019	(r349465)
+++ head/sys/dev/altera/msgdma/msgdma.h	Thu Jun 27 18:08:18 2019	(r349466)
@@ -30,6 +30,8 @@
  * $FreeBSD$
  */
 
+#include "opt_altera_msgdma.h"
+
 /* Altera mSGDMA registers. */
 #define	DMA_STATUS		0x00
 #define	 STATUS_RESETTING	(1 << 6)
@@ -75,22 +77,74 @@
 #define	WRITE4_DESC(_sc, _reg, _val)	\
 	bus_space_write_4(_sc->bst_d, _sc->bsh_d, _reg, htole32(_val))
 
-/* Prefetcher-disabled descriptor format. */
-struct msgdma_desc_nonpf {
-	uint32_t src_addr;
-	uint32_t dst_addr;
+#if defined(ALTERA_MSGDMA_DESC_STD)
+
+/* Standard descriptor format with prefetcher disabled. */
+struct msgdma_desc {
+	uint32_t read_lo;
+	uint32_t write_lo;
 	uint32_t length;
 	uint32_t control;
 };
 
-/* Prefetcher-enabled descriptor format. */
+#elif defined(ALTERA_MSGDMA_DESC_EXT)
+
+/* Extended descriptor format with prefetcher disabled. */
 struct msgdma_desc {
 	uint32_t read_lo;
 	uint32_t write_lo;
 	uint32_t length;
+	uint8_t write_burst;
+	uint8_t read_burst;
+	uint16_t seq_num;
+	uint16_t write_stride;
+	uint16_t read_stride;
+	uint32_t read_hi;
+	uint32_t write_hi;
+	uint32_t control;
+};
+
+#elif defined(ALTERA_MSGDMA_DESC_PF_STD)
+
+/* Standard descriptor format with prefetcher enabled. */
+struct msgdma_desc {
+	uint32_t read_lo;
+	uint32_t write_lo;
+	uint32_t length;
 	uint32_t next;
 	uint32_t transferred;
 	uint32_t status;
 	uint32_t reserved;
 	uint32_t control;
 };
+
+#elif defined(ALTERA_MSGDMA_DESC_PF_EXT)
+
+/* Extended descriptor format with prefetcher enabled. */
+struct msgdma_desc {
+	uint32_t read_lo;
+	uint32_t write_lo;
+	uint32_t length;
+	uint32_t next;
+	uint32_t transferred;
+	uint32_t status;
+	uint32_t reserved;
+	uint8_t write_burst;
+	uint8_t read_burst;
+	uint16_t seq_num;
+	uint16_t write_stride;
+	uint16_t read_stride;
+	uint32_t read_hi;
+	uint32_t write_hi;
+	uint32_t next_hi;
+	uint32_t reserved1;
+	uint32_t reserved2;
+	uint32_t reserved3;
+	uint32_t control;
+};
+
+#else
+
+#error	"mSGDMA descriptor format (kernel option) is not set."
+
+#endif

Modified: head/sys/mips/conf/BERI_DE4_BASE
==============================================================================
--- head/sys/mips/conf/BERI_DE4_BASE	Thu Jun 27 17:59:15 2019	(r349465)
+++ head/sys/mips/conf/BERI_DE4_BASE	Thu Jun 27 18:08:18 2019	(r349466)
@@ -44,6 +44,7 @@ options 	DEVICE_POLLING
 #
 # DMA support
 #
+options		ALTERA_MSGDMA_DESC_PF_STD
 device		xdma
 device		altera_softdma
 device		altera_msgdma