ALSA: Clean up SG-buffer helper functions and macros

Clean up SG-buffer helper functions and macros.  Helpers take substream
as arguments now.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

include/sound/memalloc.h

@@ -65,6 +65,11 @@ struct snd_dma_buffer {
 /*
  * Scatter-Gather generic device pages
  */
+void *snd_malloc_sgbuf_pages(struct device *device,
+			     size_t size, struct snd_dma_buffer *dmab,
+			     size_t *res_size);
+int snd_free_sgbuf_pages(struct snd_dma_buffer *dmab);
+
 struct snd_sg_page {
 	void *buf;
 	dma_addr_t addr;
@@ -95,6 +100,13 @@ static inline dma_addr_t snd_sgbuf_get_addr(struct snd_sg_buf *sgbuf, size_t off
 	return sgbuf->table[offset >> PAGE_SHIFT].addr + offset % PAGE_SIZE;
 }
 
+/*
+ * return the virtual address at the corresponding offset
+ */
+static inline void *snd_sgbuf_get_ptr(struct snd_sg_buf *sgbuf, size_t offset)
+{
+	return sgbuf->table[offset >> PAGE_SHIFT].buf + offset % PAGE_SIZE;
+}
 
 /* allocate/release a buffer */
 int snd_dma_alloc_pages(int type, struct device *dev, size_t size,

include/sound/pcm.h

@@ -974,10 +974,29 @@ int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
 int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
 int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
 
-#define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data)
-#define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size)
-#define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs)
-struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, unsigned long offset);
+/*
+ * SG-buffer handling
+ */
+#define snd_pcm_substream_sgbuf(substream) \
+	((substream)->runtime->dma_buffer_p->private_data)
+
+static inline dma_addr_t
+snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
+{
+	struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
+	return snd_sgbuf_get_addr(sg, ofs);
+}
+
+static inline void *
+snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
+{
+	struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
+	return snd_sgbuf_get_ptr(sg, ofs);
+}
+
+struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
+				    unsigned long offset);
+
 
 /* handle mmap counter - PCM mmap callback should handle this counter properly */
 static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)

sound/core/memalloc.c

@@ -43,14 +43,6 @@ MODULE_DESCRIPTION("Memory allocator for ALSA system.");
 MODULE_LICENSE("GPL");
 
 
-/*
- */
-
-void *snd_malloc_sgbuf_pages(struct device *device,
-                             size_t size, struct snd_dma_buffer *dmab,
-			     size_t *res_size);
-int snd_free_sgbuf_pages(struct snd_dma_buffer *dmab);
-
 /*
  */
 

sound/pci/au88x0/au88x0.h

@@ -125,7 +125,6 @@ typedef struct {
 	/* Virtual page extender stuff */
 	int nr_periods;
 	int period_bytes;
-	struct snd_sg_buf *sgbuf;	/* DMA Scatter Gather struct */
 	int period_real;
 	int period_virt;
 
@@ -195,16 +194,14 @@ static void vortex_adb_setsrc(vortex_t * vortex, int adbdma,
 
 /* DMA Engines. */
 static void vortex_adbdma_setbuffers(vortex_t * vortex, int adbdma,
-				     struct snd_sg_buf * sgbuf, int size,
-				     int count);
+				     int size, int count);
 static void vortex_adbdma_setmode(vortex_t * vortex, int adbdma, int ie,
 				  int dir, int fmt, int d,
 				  u32 offset);
 static void vortex_adbdma_setstartbuffer(vortex_t * vortex, int adbdma, int sb);
 #ifndef CHIP_AU8810
 static void vortex_wtdma_setbuffers(vortex_t * vortex, int wtdma,
-				    struct snd_sg_buf * sgbuf, int size,
-				    int count);
+				    int size, int count);
 static void vortex_wtdma_setmode(vortex_t * vortex, int wtdma, int ie, int fmt, int d,	/*int e, */
 				 u32 offset);
 static void vortex_wtdma_setstartbuffer(vortex_t * vortex, int wtdma, int sb);

sound/pci/au88x0/au88x0_core.c

@@ -1097,19 +1097,12 @@ static void vortex_adbdma_setstartbuffer(vortex_t * vortex, int adbdma, int sb)
 
 static void
 vortex_adbdma_setbuffers(vortex_t * vortex, int adbdma,
-			 struct snd_sg_buf * sgbuf, int psize, int count)
+			 int psize, int count)
 {
 	stream_t *dma = &vortex->dma_adb[adbdma];
 
-	if (sgbuf == NULL) {
-		printk(KERN_INFO "vortex: FATAL: sgbuf is NULL!\n");
-		return;
-	}
-	//printk(KERN_INFO "vortex: page count = %d, tblcount = %d\n", count, sgbuf->tblsize);
-
 	dma->period_bytes = psize;
 	dma->nr_periods = count;
-	dma->sgbuf = sgbuf;
 
 	dma->cfg0 = 0;
 	dma->cfg1 = 0;
@@ -1120,26 +1113,26 @@ vortex_adbdma_setbuffers(vortex_t * vortex, int adbdma,
 		dma->cfg1 |= 0x88000000 | 0x44000000 | 0x30000000 | (psize - 1);
 		hwwrite(vortex->mmio,
 			VORTEX_ADBDMA_BUFBASE + (adbdma << 4) + 0xc,
-			snd_sgbuf_get_addr(sgbuf, psize * 3));
+			snd_pcm_sgbuf_get_addr(dma->substream, psize * 3));
 		/* 3 pages */
 	case 3:
 		dma->cfg0 |= 0x12000000;
 		dma->cfg1 |= 0x80000000 | 0x40000000 | ((psize - 1) << 0xc);
 		hwwrite(vortex->mmio,
 			VORTEX_ADBDMA_BUFBASE + (adbdma << 4) + 0x8,
-			snd_sgbuf_get_addr(sgbuf, psize * 2));
+			snd_pcm_sgbuf_get_addr(dma->substream, psize * 2));
 		/* 2 pages */
 	case 2:
 		dma->cfg0 |= 0x88000000 | 0x44000000 | 0x10000000 | (psize - 1);
 		hwwrite(vortex->mmio,
 			VORTEX_ADBDMA_BUFBASE + (adbdma << 4) + 0x4,
-			snd_sgbuf_get_addr(sgbuf, psize));
+			snd_pcm_sgbuf_get_addr(dma->substream, psize));
 		/* 1 page */
 	case 1:
 		dma->cfg0 |= 0x80000000 | 0x40000000 | ((psize - 1) << 0xc);
 		hwwrite(vortex->mmio,
 			VORTEX_ADBDMA_BUFBASE + (adbdma << 4),
-			snd_sgbuf_get_addr(sgbuf, 0));
+			snd_pcm_sgbuf_get_addr(dma->substream, 0));
 		break;
 	}
 	//printk("vortex: cfg0 = 0x%x\nvortex: cfg1=0x%x\n", dma->cfg0, dma->cfg1);
@@ -1205,7 +1198,7 @@ static int vortex_adbdma_bufshift(vortex_t * vortex, int adbdma)
 			//hwwrite(vortex->mmio, VORTEX_ADBDMA_BUFBASE+(((adbdma << 2)+pp) << 2), dma->table[p].addr);
 			hwwrite(vortex->mmio,
 				VORTEX_ADBDMA_BUFBASE + (((adbdma << 2) + pp) << 2),
-				snd_sgbuf_get_addr(dma->sgbuf,
+				snd_pcm_sgbuf_get_addr(dma->substream,
 				dma->period_bytes * p));
 			/* Force write thru cache. */
 			hwread(vortex->mmio, VORTEX_ADBDMA_BUFBASE +
@@ -1244,7 +1237,10 @@ static void vortex_adbdma_resetup(vortex_t *vortex, int adbdma) {
 			if (pp >= 4)
 				pp -= 4;
 		}
-		hwwrite(vortex->mmio, VORTEX_ADBDMA_BUFBASE+(((adbdma << 2)+pp) << 2), snd_sgbuf_get_addr(dma->sgbuf, dma->period_bytes * p));
+		hwwrite(vortex->mmio,
+			VORTEX_ADBDMA_BUFBASE + (((adbdma << 2) + pp) << 2),
+			snd_pcm_sgbuf_get_addr(dma->substream,
+					       dma->period_bytes * p));
 		/* Force write thru cache. */
 		hwread(vortex->mmio, VORTEX_ADBDMA_BUFBASE + (((adbdma << 2)+pp) << 2));
 	}
@@ -1367,13 +1363,12 @@ static void vortex_wtdma_setstartbuffer(vortex_t * vortex, int wtdma, int sb)
 
 static void
 vortex_wtdma_setbuffers(vortex_t * vortex, int wtdma,
-			struct snd_sg_buf * sgbuf, int psize, int count)
+			int psize, int count)
 {
 	stream_t *dma = &vortex->dma_wt[wtdma];
 
 	dma->period_bytes = psize;
 	dma->nr_periods = count;
-	dma->sgbuf = sgbuf;
 
 	dma->cfg0 = 0;
 	dma->cfg1 = 0;
@@ -1383,23 +1378,23 @@ vortex_wtdma_setbuffers(vortex_t * vortex, int wtdma,
 	case 4:
 		dma->cfg1 |= 0x88000000 | 0x44000000 | 0x30000000 | (psize-1);
 		hwwrite(vortex->mmio, VORTEX_WTDMA_BUFBASE + (wtdma << 4) + 0xc,
-			snd_sgbuf_get_addr(sgbuf, psize * 3));
+			snd_pcm_sgbuf_get_addr(dma->substream, psize * 3));
 		/* 3 pages */
 	case 3:
 		dma->cfg0 |= 0x12000000;
 		dma->cfg1 |= 0x80000000 | 0x40000000 | ((psize-1) << 0xc);
 		hwwrite(vortex->mmio, VORTEX_WTDMA_BUFBASE + (wtdma << 4)  + 0x8,
-			snd_sgbuf_get_addr(sgbuf, psize * 2));
+			snd_pcm_sgbuf_get_addr(dma->substream, psize * 2));
 		/* 2 pages */
 	case 2:
 		dma->cfg0 |= 0x88000000 | 0x44000000 | 0x10000000 | (psize-1);
 		hwwrite(vortex->mmio, VORTEX_WTDMA_BUFBASE + (wtdma << 4) + 0x4,
-			snd_sgbuf_get_addr(sgbuf, psize));
+			snd_pcm_sgbuf_get_addr(dma->substream, psize));
 		/* 1 page */
 	case 1:
 		dma->cfg0 |= 0x80000000 | 0x40000000 | ((psize-1) << 0xc);
 		hwwrite(vortex->mmio, VORTEX_WTDMA_BUFBASE + (wtdma << 4),
-			snd_sgbuf_get_addr(sgbuf, 0));
+			snd_pcm_sgbuf_get_addr(dma->substream, 0));
 		break;
 	}
 	hwwrite(vortex->mmio, VORTEX_WTDMA_BUFCFG0 + (wtdma << 3), dma->cfg0);
@@ -1465,7 +1460,8 @@ static int vortex_wtdma_bufshift(vortex_t * vortex, int wtdma)
 			hwwrite(vortex->mmio,
 				VORTEX_WTDMA_BUFBASE +
 				(((wtdma << 2) + pp) << 2),
-				snd_sgbuf_get_addr(dma->sgbuf, dma->period_bytes * p));
+				snd_pcm_sgbuf_get_addr(dma->substream,
+						       dma->period_bytes * p));
 			/* Force write thru cache. */
 			hwread(vortex->mmio, VORTEX_WTDMA_BUFBASE +
 			       (((wtdma << 2) + pp) << 2));

sound/pci/au88x0/au88x0_pcm.c

@@ -189,7 +189,6 @@ snd_vortex_pcm_hw_params(struct snd_pcm_substream *substream,
 {
 	vortex_t *chip = snd_pcm_substream_chip(substream);
 	stream_t *stream = (stream_t *) (substream->runtime->private_data);
-	struct snd_sg_buf *sgbuf;
 	int err;
 
 	// Alloc buffer memory.
@@ -199,8 +198,6 @@ snd_vortex_pcm_hw_params(struct snd_pcm_substream *substream,
 		printk(KERN_ERR "Vortex: pcm page alloc failed!\n");
 		return err;
 	}
-	//sgbuf = (struct snd_sg_buf *) substream->runtime->dma_private;
-	sgbuf = snd_pcm_substream_sgbuf(substream);
 	/*
 	   printk(KERN_INFO "Vortex: periods %d, period_bytes %d, channels = %d\n", params_periods(hw_params),
 	   params_period_bytes(hw_params), params_channels(hw_params));
@@ -226,7 +223,7 @@ snd_vortex_pcm_hw_params(struct snd_pcm_substream *substream,
 		stream = substream->runtime->private_data = &chip->dma_adb[dma];
 		stream->substream = substream;
 		/* Setup Buffers. */
-		vortex_adbdma_setbuffers(chip, dma, sgbuf,
+		vortex_adbdma_setbuffers(chip, dma,
 					 params_period_bytes(hw_params),
 					 params_periods(hw_params));
 	}
@@ -240,7 +237,7 @@ snd_vortex_pcm_hw_params(struct snd_pcm_substream *substream,
 		    &chip->dma_wt[substream->number];
 		stream->dma = substream->number;
 		stream->substream = substream;
-		vortex_wtdma_setbuffers(chip, substream->number, sgbuf,
+		vortex_wtdma_setbuffers(chip, substream->number,
 					params_period_bytes(hw_params),
 					params_periods(hw_params));
 	}
@@ -392,13 +389,6 @@ static snd_pcm_uframes_t snd_vortex_pcm_pointer(struct snd_pcm_substream *substr
 	return (bytes_to_frames(substream->runtime, current_ptr));
 }
 
-/* Page callback. */
-/*
-static struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, unsigned long offset) {
-	
-	
-}
-*/
 /* operators */
 static struct snd_pcm_ops snd_vortex_playback_ops = {
 	.open = snd_vortex_pcm_open,

sound/pci/bt87x.c

@@ -227,7 +227,6 @@ static inline void snd_bt87x_writel(struct snd_bt87x *chip, u32 reg, u32 value)
 static int snd_bt87x_create_risc(struct snd_bt87x *chip, struct snd_pcm_substream *substream,
 			       	 unsigned int periods, unsigned int period_bytes)
 {
-	struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
 	unsigned int i, offset;
 	u32 *risc;
 
@@ -246,6 +245,7 @@ static int snd_bt87x_create_risc(struct snd_bt87x *chip, struct snd_pcm_substrea
 		rest = period_bytes;
 		do {
 			u32 cmd, len;
+			unsigned int addr;
 
 			len = PAGE_SIZE - (offset % PAGE_SIZE);
 			if (len > rest)
@@ -260,7 +260,8 @@ static int snd_bt87x_create_risc(struct snd_bt87x *chip, struct snd_pcm_substrea
 			if (len == rest)
 				cmd |= RISC_EOL | RISC_IRQ;
 			*risc++ = cpu_to_le32(cmd);
-			*risc++ = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, offset));
+			addr = snd_pcm_sgbuf_get_addr(substream, offset);
+			*risc++ = cpu_to_le32(addr);
 			offset += len;
 			rest -= len;
 		} while (rest > 0);

sound/pci/echoaudio/echoaudio.c

@@ -490,7 +490,6 @@ static int init_engine(struct snd_pcm_substream *substream,
 {
 	struct echoaudio *chip;
 	int err, per, rest, page, edge, offs;
-	struct snd_sg_buf *sgbuf;
 	struct audiopipe *pipe;
 
 	chip = snd_pcm_substream_chip(substream);
@@ -531,10 +530,6 @@ static int init_engine(struct snd_pcm_substream *substream,
 		return err;
 	}
 
-	sgbuf = snd_pcm_substream_sgbuf(substream);
-
-	DE_HWP(("pcm_hw_params table size=%d pages=%d\n",
-		sgbuf->size, sgbuf->pages));
 	sglist_init(chip, pipe);
 	edge = PAGE_SIZE;
 	for (offs = page = per = 0; offs < params_buffer_bytes(hw_params);
@@ -543,16 +538,15 @@ static int init_engine(struct snd_pcm_substream *substream,
 		if (offs + rest > params_buffer_bytes(hw_params))
 			rest = params_buffer_bytes(hw_params) - offs;
 		while (rest) {
+			dma_addr_t addr;
+			addr = snd_pcm_sgbuf_get_addr(substream, offs);
 			if (rest <= edge - offs) {
-				sglist_add_mapping(chip, pipe,
-						   snd_sgbuf_get_addr(sgbuf, offs),
-						   rest);
+				sglist_add_mapping(chip, pipe, addr, rest);
 				sglist_add_irq(chip, pipe);
 				offs += rest;
 				rest = 0;
 			} else {
-				sglist_add_mapping(chip, pipe,
-						   snd_sgbuf_get_addr(sgbuf, offs),
+				sglist_add_mapping(chip, pipe, addr,
 						   edge - offs);
 				rest -= edge - offs;
 				offs = edge;

sound/pci/emu10k1/memory.c

@@ -296,7 +296,6 @@ struct snd_util_memblk *
 snd_emu10k1_alloc_pages(struct snd_emu10k1 *emu, struct snd_pcm_substream *substream)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
-	struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
 	struct snd_util_memhdr *hdr;
 	struct snd_emu10k1_memblk *blk;
 	int page, err, idx;
@@ -321,16 +320,9 @@ snd_emu10k1_alloc_pages(struct snd_emu10k1 *emu, struct snd_pcm_substream *subst
 	 */
 	idx = 0;
 	for (page = blk->first_page; page <= blk->last_page; page++, idx++) {
+		unsigned long ofs = idx << PAGE_SHIFT;
 		dma_addr_t addr;
-#ifdef CONFIG_SND_DEBUG
-		if (idx >= sgbuf->pages) {
-			printk(KERN_ERR "emu: pages overflow! (%d-%d) for %d\n",
-			       blk->first_page, blk->last_page, sgbuf->pages);
-			mutex_unlock(&hdr->block_mutex);
-			return NULL;
-		}
-#endif
-		addr = sgbuf->table[idx].addr;
+		addr = snd_pcm_sgbuf_get_addr(substream, ofs);
 		if (! is_valid_page(emu, addr)) {
 			printk(KERN_ERR "emu: failure page = %d\n", idx);
 			mutex_unlock(&hdr->block_mutex);

sound/pci/hda/hda_intel.c

@@ -998,7 +998,6 @@ static int setup_bdle(struct snd_pcm_substream *substream,
 		      struct azx_dev *azx_dev, u32 **bdlp,
 		      int ofs, int size, int with_ioc)
 {
-	struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
 	u32 *bdl = *bdlp;
 
 	while (size > 0) {
@@ -1008,7 +1007,7 @@ static int setup_bdle(struct snd_pcm_substream *substream,
 		if (azx_dev->frags >= AZX_MAX_BDL_ENTRIES)
 			return -EINVAL;
 
-		addr = snd_pcm_sgbuf_get_addr(sgbuf, ofs);
+		addr = snd_pcm_sgbuf_get_addr(substream, ofs);
 		/* program the address field of the BDL entry */
 		bdl[0] = cpu_to_le32((u32)addr);
 		bdl[1] = cpu_to_le32(upper_32_bits(addr));

sound/pci/riptide/riptide.c

@@ -1483,7 +1483,6 @@ static int snd_riptide_prepare(struct snd_pcm_substream *substream)
 {
 	struct snd_riptide *chip = snd_pcm_substream_chip(substream);
 	struct snd_pcm_runtime *runtime = substream->runtime;
-	struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
 	struct pcmhw *data = get_pcmhwdev(substream);
 	struct cmdif *cif = chip->cif;
 	unsigned char *lbuspath = NULL;
@@ -1515,9 +1514,9 @@ static int snd_riptide_prepare(struct snd_pcm_substream *substream)
 			lbuspath = data->paths.stereo;
 		break;
 	}
-	snd_printdd("use sgdlist at 0x%p and buffer at 0x%p\n",
-		    data->sgdlist.area, sgbuf);
-	if (data->sgdlist.area && sgbuf) {
+	snd_printdd("use sgdlist at 0x%p\n",
+		    data->sgdlist.area);
+	if (data->sgdlist.area) {
 		unsigned int i, j, size, pages, f, pt, period;
 		struct sgd *c, *p = NULL;
 
@@ -1535,6 +1534,7 @@ static int snd_riptide_prepare(struct snd_pcm_substream *substream)
 		pt = 0;
 		j = 0;
 		for (i = 0; i < pages; i++) {
+			unsigned int ofs, addr;
 			c = &data->sgdbuf[i];
 			if (p)
 				p->dwNextLink = cpu_to_le32(data->sgdlist.addr +
@@ -1542,8 +1542,9 @@ static int snd_riptide_prepare(struct snd_pcm_substream *substream)
 							     sizeof(struct
 								    sgd)));
 			c->dwNextLink = cpu_to_le32(data->sgdlist.addr);
-			c->dwSegPtrPhys =
-			    cpu_to_le32(sgbuf->table[j].addr + pt);
+			ofs = j << PAGE_SHIFT;
+			addr = snd_pcm_sgbuf_get_addr(substream, ofs) + pt;
+			c->dwSegPtrPhys = cpu_to_le32(addr);
 			pt = (pt + f) % PAGE_SIZE;
 			if (pt == 0)
 				j++;

sound/pci/rme9652/hdspm.c

@@ -535,7 +535,8 @@ static inline void snd_hdspm_initialize_midi_flush(struct hdspm * hdspm);
 static int hdspm_update_simple_mixer_controls(struct hdspm * hdspm);
 static int hdspm_autosync_ref(struct hdspm * hdspm);
 static int snd_hdspm_set_defaults(struct hdspm * hdspm);
-static void hdspm_set_sgbuf(struct hdspm * hdspm, struct snd_sg_buf *sgbuf,
+static void hdspm_set_sgbuf(struct hdspm * hdspm,
+			    struct snd_pcm_substream *substream,
 			     unsigned int reg, int channels);
 
 static inline int HDSPM_bit2freq(int n)
@@ -3604,8 +3605,6 @@ static int snd_hdspm_hw_params(struct snd_pcm_substream *substream,
 	int i;
 	pid_t this_pid;
 	pid_t other_pid;
-	struct snd_sg_buf *sgbuf;
-
 
 	spin_lock_irq(&hdspm->lock);
 
@@ -3673,11 +3672,9 @@ static int snd_hdspm_hw_params(struct snd_pcm_substream *substream,
 	if (err < 0)
 		return err;
 
-	sgbuf = snd_pcm_substream_sgbuf(substream);
-
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 
-		hdspm_set_sgbuf(hdspm, sgbuf, HDSPM_pageAddressBufferOut,
+		hdspm_set_sgbuf(hdspm, substream, HDSPM_pageAddressBufferOut,
 				params_channels(params));
 
 		for (i = 0; i < params_channels(params); ++i)
@@ -3688,7 +3685,7 @@ static int snd_hdspm_hw_params(struct snd_pcm_substream *substream,
 		snd_printdd("Allocated sample buffer for playback at %p\n",
 				hdspm->playback_buffer);
 	} else {
-		hdspm_set_sgbuf(hdspm, sgbuf, HDSPM_pageAddressBufferIn,
+		hdspm_set_sgbuf(hdspm, substream, HDSPM_pageAddressBufferIn,
 				params_channels(params));
 
 		for (i = 0; i < params_channels(params); ++i)
@@ -3703,7 +3700,7 @@ static int snd_hdspm_hw_params(struct snd_pcm_substream *substream,
 	   snd_printdd("Allocated sample buffer for %s at 0x%08X\n",
 	   substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
 	   "playback" : "capture",
-	   snd_pcm_sgbuf_get_addr(sgbuf, 0));
+	   snd_pcm_sgbuf_get_addr(substream, 0));
 	 */
 	/*
 	snd_printdd("set_hwparams: %s %d Hz, %d channels, bs = %d\n",
@@ -4253,13 +4250,14 @@ static int __devinit snd_hdspm_preallocate_memory(struct hdspm * hdspm)
 	return 0;
 }
 
-static void hdspm_set_sgbuf(struct hdspm * hdspm, struct snd_sg_buf *sgbuf,
+static void hdspm_set_sgbuf(struct hdspm * hdspm,
+			    struct snd_pcm_substream *substream,
 			     unsigned int reg, int channels)
 {
 	int i;
 	for (i = 0; i < (channels * 16); i++)
 		hdspm_write(hdspm, reg + 4 * i,
-			    snd_pcm_sgbuf_get_addr(sgbuf, (size_t) 4096 * i));
+			    snd_pcm_sgbuf_get_addr(substream, 4096 * i));
 }
 
 /* ------------- ALSA Devices ---------------------------- */

sound/pci/trident/trident_memory.c

@@ -194,7 +194,6 @@ snd_trident_alloc_sg_pages(struct snd_trident *trident,
 	struct snd_util_memblk *blk;
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	int idx, page;
-	struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
 
 	if (snd_BUG_ON(runtime->dma_bytes <= 0 ||
 		       runtime->dma_bytes > SNDRV_TRIDENT_MAX_PAGES *
@@ -212,18 +211,14 @@ snd_trident_alloc_sg_pages(struct snd_trident *trident,
 		mutex_unlock(&hdr->block_mutex);
 		return NULL;
 	}
-	if (lastpg(blk) - firstpg(blk) >= sgbuf->pages) {
-		snd_printk(KERN_ERR "page calculation doesn't match: allocated pages = %d, trident = %d/%d\n", sgbuf->pages, firstpg(blk), lastpg(blk));
-		__snd_util_mem_free(hdr, blk);
-		mutex_unlock(&hdr->block_mutex);
-		return NULL;
-	}
 			   
 	/* set TLB entries */
 	idx = 0;
 	for (page = firstpg(blk); page <= lastpg(blk); page++, idx++) {
-		dma_addr_t addr = sgbuf->table[idx].addr;
-		unsigned long ptr = (unsigned long)sgbuf->table[idx].buf;
+		unsigned long ofs = idx << PAGE_SHIFT;
+		dma_addr_t addr = snd_pcm_sgbuf_get_addr(substream, ofs);
+		unsigned long ptr = (unsigned long)
+			snd_pcm_sgbuf_get_ptr(substream, ofs);
 		if (! is_valid_page(addr)) {
 			__snd_util_mem_free(hdr, blk);
 			mutex_unlock(&hdr->block_mutex);

sound/pci/via82xx.c

@@ -420,7 +420,6 @@ static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substre
 {
 	unsigned int i, idx, ofs, rest;
 	struct via82xx *chip = snd_pcm_substream_chip(substream);
-	struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
 
 	if (dev->table.area == NULL) {
 		/* the start of each lists must be aligned to 8 bytes,
@@ -449,12 +448,14 @@ static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substre
 		do {
 			unsigned int r;
 			unsigned int flag;
+			unsigned int addr;
 
 			if (idx >= VIA_TABLE_SIZE) {
 				snd_printk(KERN_ERR "via82xx: too much table size!\n");
 				return -EINVAL;
 			}
-			((u32 *)dev->table.area)[idx << 1] = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, ofs));
+			addr = snd_pcm_sgbuf_get_addr(substream, ofs);
+			((u32 *)dev->table.area)[idx << 1] = cpu_to_le32(addr);
 			r = PAGE_SIZE - (ofs % PAGE_SIZE);
 			if (rest < r)
 				r = rest;

sound/pci/via82xx_modem.c

@@ -281,7 +281,6 @@ static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substre
 {
 	unsigned int i, idx, ofs, rest;
 	struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
-	struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
 
 	if (dev->table.area == NULL) {
 		/* the start of each lists must be aligned to 8 bytes,
@@ -310,12 +309,14 @@ static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substre
 		do {
 			unsigned int r;
 			unsigned int flag;
+			unsigned int addr;
 
 			if (idx >= VIA_TABLE_SIZE) {
 				snd_printk(KERN_ERR "via82xx: too much table size!\n");
 				return -EINVAL;
 			}
-			((u32 *)dev->table.area)[idx << 1] = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, ofs));
+			addr = snd_pcm_sgbuf_get_addr(substream, ofs);
+			((u32 *)dev->table.area)[idx << 1] = cpu_to_le32(addr);
 			r = PAGE_SIZE - (ofs % PAGE_SIZE);
 			if (rest < r)
 				r = rest;