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Diffstat (limited to 'src/mesa/drivers/dri/savage/savagedma.c')
-rw-r--r--src/mesa/drivers/dri/savage/savagedma.c298
1 files changed, 298 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/savage/savagedma.c b/src/mesa/drivers/dri/savage/savagedma.c
new file mode 100644
index 0000000000..9b0bdc8b9f
--- /dev/null
+++ b/src/mesa/drivers/dri/savage/savagedma.c
@@ -0,0 +1,298 @@
+/*
+ * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sub license,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <X11/Xlibint.h>
+#include <stdio.h>
+#include "savageioctl.h"
+#include "savagedma.h"
+#include "savage_bci.h"
+#include <time.h>
+#include <unistd.h>
+
+/* Commit does not depend on whether we use real DMA or fake it via the BCI */
+void savageDMACommit (savageContextPtr imesa, void *endPtr) {
+ DMABufferPtr dmaBuff = &imesa->DMABuf;
+ GLuint end = (GLuint)endPtr;
+
+ /* make sure that enough space was allocated */
+ assert (end <= dmaBuff->allocEnd);
+
+ dmaBuff->allocEnd = dmaBuff->end = end;
+
+ /* TODO: check commands, either here or in flush */
+}
+
+#if SAVAGE_CMD_DMA
+/* flag =
+ 0 return -1 if no available page
+ 1 wait until a page be available */
+static GLuint getDMAPage (savageContextPtr imesa, int flag) {
+ DMABufferPtr dmaBuff = &imesa->DMABuf;
+ GLuint page;
+ GLuint eventTag1;
+
+ if (dmaBuff->kickFlag == GL_FALSE)
+ return dmaBuff->usingPage;
+
+ page = dmaBuff->usingPage + 1;
+
+ /* overflow */
+ if (page >= (dmaBuff->buf->size * dmaBuff->buf->type)/DMA_PAGE_SIZE)
+ page = 0;
+
+ eventTag1 = GET_EVENTTAG;
+ if ( eventTag1 == page) { /* is kicking off */
+ if (flag == 1)
+ while (GET_EVENTTAG == page); /* FIXME: add a max loop count? */
+ else
+ return -1;
+ }
+
+ /* ok, that's it */
+ dmaBuff->usingPage = page;
+ dmaBuff->start = dmaBuff->end = dmaBuff->allocEnd =
+ (dmaBuff->buf->linear + DMA_PAGE_SIZE * page);
+ dmaBuff->kickFlag = GL_FALSE;
+
+ return page;
+}
+
+/* Allocate space in a real DMA buffer */
+void *savageDMAAlloc (savageContextPtr imesa, GLuint size) {
+ DMABufferPtr dmaBuff = &imesa->DMABuf;
+
+ /* make sure that everything has been filled in and committed */
+ assert (dmaBuff->end == dmaBuff->allocEnd);
+
+ size *= sizeof (GLuint); /* size in bytes */
+ if (dmaBuff->kickFlag == GL_TRUE) {
+ if (size > DMA_PAGE_SIZE)
+ return NULL;
+ getDMAPage (imesa, 1);
+ } else if (dmaBuff->end + size >=
+ dmaBuff->buf->linear + DMA_PAGE_SIZE*(dmaBuff->usingPage+1)) {
+ /* need kick off */
+ savageDMAFlush (imesa);
+ getDMAPage (imesa, 1);
+ }
+ dmaBuff->allocEnd = dmaBuff->end + size;
+ return (void *)dmaBuff->end;
+}
+
+/* Flush DMA buffer via DMA */
+void savageDMAFlush (savageContextPtr imesa) {
+ volatile GLuint* BCIbase;
+ DMABufferPtr dmaBuff = &imesa->DMABuf;
+ GLuint phyAddress;
+ GLuint dmaCount, dmaCount1, remain;
+ int i;
+
+ /* make sure that everything has been filled in and committed */
+ assert (dmaBuff->allocEnd == dmaBuff->end);
+
+ if (dmaBuff->kickFlag == GL_TRUE) /* has been kicked off? */
+ return;
+ if (dmaBuff->start == dmaBuff->end) /* no command? */
+ return;
+
+ /* get bci base */
+ BCIbase = (volatile GLuint *)SAVAGE_GET_BCI_POINTER(imesa,4);
+
+ /* set the eventtag */
+ *BCIbase = (dmaBuff->usingPage & 0xffffL) | (CMD_UpdateShadowStat << 27)
+ | (1 << 22);
+ *BCIbase = 0x96010051; /* set register x51*/
+ /* set the DMA buffer address */
+ phyAddress = (dmaBuff->buf->phyaddress + dmaBuff->usingPage*DMA_PAGE_SIZE)
+ & MDT_SRCADD_ALIGMENT;
+ if (dmaBuff->buf->location == DRM_SAVAGE_MEM_LOCATION_AGP)
+ *BCIbase = (phyAddress) | MDT_SRC_AGP;
+ else
+ *BCIbase = (phyAddress) | MDT_SRC_PCI;
+
+ /* pad with noops to multiple of 32 bytes */
+ dmaCount = (GLuint)(dmaBuff->end - dmaBuff->start);
+ dmaCount1 = (dmaCount + 31UL) & ~31UL;
+ remain = (dmaCount1 - dmaCount) >> 2;
+ for (i = 0; i < remain; i++) {
+ *((GLuint *)dmaBuff->end) = 0x40000000L;
+ dmaBuff->end+=4;
+ }
+ dmaCount = (dmaCount1 >> 3) - 1;
+ dmaBuff->allocEnd = dmaBuff->end;
+
+ /* kick off */
+ *BCIbase = (0xA8000000L)|dmaCount;
+ dmaBuff->kickFlag = GL_TRUE;
+}
+
+/* Init real DMA */
+int savageDMAInit (savageContextPtr imesa)
+{
+ DMABufferPtr dmaBuff = &imesa->DMABuf;
+ drm_savage_alloc_cont_mem_t * req;
+ int i;
+ long ret;
+
+ req = (drm_savage_alloc_cont_mem_t *)
+ malloc (sizeof(drm_savage_alloc_cont_mem_t));
+ if (!req)
+ return GL_FALSE;
+
+ req->type = DRM_SAVAGE_MEM_PAGE;
+ req->linear = 0;
+
+ /* try agp first */
+ req->phyaddress = imesa->sarea->agp_offset;
+ if (req->phyaddress) {
+ if (drmMap (imesa->driFd,
+ req->phyaddress,
+ DRM_SAVAGE_DMA_AGP_SIZE,
+ (drmAddressPtr)&req->linear) < 0) {
+ fprintf (stderr, "AGP map error.\n");
+ goto dma;
+ }
+ if (0) fprintf (stderr,"Using AGP dma|\n");
+ req->location = DRM_SAVAGE_MEM_LOCATION_AGP;
+ req->size = DRM_SAVAGE_DMA_AGP_SIZE/DRM_SAVAGE_MEM_PAGE;
+ }
+
+ dma:
+ if (!req->linear) {
+ req->size = DMA_BUFFER_SIZE/DRM_SAVAGE_MEM_PAGE;
+ for (i = 0; i < DMA_TRY_COUNT; i++) {
+ if ((ret = savageAllocDMABuffer (imesa, req)) != 0)
+ break;
+ req->size = req->size/2;
+ }
+
+ if (ret <= 0) {
+ fprintf(stderr, "Can't alloc DMA memory(system and agp)\n");
+ return GL_FALSE;
+ }
+ req->location = DRM_SAVAGE_MEM_LOCATION_PCI;
+ }
+
+ dmaBuff->buf = req;
+
+ dmaBuff->start = dmaBuff->end = dmaBuff->allocEnd = req->linear;
+ dmaBuff->usingPage = 0;
+ dmaBuff->kickFlag = GL_FALSE;
+
+ return GL_TRUE;
+}
+
+/* Close real DMA */
+int savageDMAClose (savageContextPtr imesa)
+{
+ DMABufferPtr dmaBuff = &imesa->DMABuf;
+ drm_savage_alloc_cont_mem_t * req = dmaBuff->buf;
+
+ if(req->location == DRM_SAVAGE_MEM_LOCATION_PCI)
+ savageFreeDMABuffer (imesa, req);
+ else { /* AGP memory */
+ drmUnmap ((drmAddress)req->linear, req->size*req->type);
+ drmRmMap (imesa->driFd, req->phyaddress);
+ }
+ free (req);
+
+ return GL_TRUE;
+}
+#else
+/* Allocate space in faked DMA buffer */
+void *savageDMAAlloc (savageContextPtr imesa, GLuint size) {
+ DMABufferPtr dmaBuff = &imesa->DMABuf;
+
+ /* make sure that everything has been filled in and committed */
+ assert (dmaBuff->end == dmaBuff->allocEnd);
+
+ size *= sizeof (GLuint); /* size in bytes */
+ if (dmaBuff->end + size >= dmaBuff->buf->linear + DMA_PAGE_SIZE) {
+ /* need kick off */
+ savageDMAFlush (imesa);
+ }
+ dmaBuff->allocEnd = dmaBuff->end + size;
+ return (void *)dmaBuff->end;
+}
+
+/* Flush DMA buffer via BCI (faked DMA) */
+void savageDMAFlush(savageContextPtr imesa) {
+ volatile GLuint* BCIbase;
+ DMABufferPtr dmaBuff = &imesa->DMABuf;
+ GLuint *entry;
+
+ /* make sure that everything has been filled in and committed */
+ assert (dmaBuff->allocEnd == dmaBuff->end);
+
+ if (dmaBuff->start == dmaBuff->end) /* no command? */
+ return;
+
+ /* get bci base */
+ BCIbase = (volatile GLuint *)SAVAGE_GET_BCI_POINTER(
+ imesa, (dmaBuff->end - dmaBuff->start) / sizeof (GLuint));
+
+ for (entry = (GLuint *)dmaBuff->start;
+ entry < (GLuint *)dmaBuff->end; ++entry)
+ *BCIbase = *entry;
+
+ dmaBuff->end = dmaBuff->allocEnd = dmaBuff->start;
+}
+
+/* Init faked DMA */
+int savageDMAInit (savageContextPtr imesa) {
+ DMABufferPtr dmaBuff = &imesa->DMABuf;
+ drm_savage_alloc_cont_mem_t * req;
+
+ req = (drm_savage_alloc_cont_mem_t *)
+ malloc (sizeof(drm_savage_alloc_cont_mem_t));
+ if (!req)
+ return GL_FALSE;
+
+ req->linear = (GLuint)malloc (DMA_PAGE_SIZE);
+ if (!req->linear) {
+ free (req);
+ return GL_FALSE;
+ }
+
+ dmaBuff->buf = req;
+
+ dmaBuff->start = dmaBuff->end = dmaBuff->allocEnd = req->linear;
+ dmaBuff->usingPage = 0;
+ dmaBuff->kickFlag = GL_FALSE;
+
+ return GL_TRUE;
+}
+
+/* Close faked DMA */
+int savageDMAClose (savageContextPtr imesa) {
+ DMABufferPtr dmaBuff = &imesa->DMABuf;
+ drm_savage_alloc_cont_mem_t * req = dmaBuff->buf;
+
+ free ((void *)req->linear);
+ free (req);
+
+ return GL_TRUE;
+}
+
+#endif
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