index : renesas/drm.git	android live master
	libdrm, cloned from git://anongit.freedesktop.org/mesa/drm	Laurent Pinchart

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log msg author committer range

Age	Commit message (Collapse)	Author
2000-07-12	Final misc changes to bring upto 4.0.1	Alan Hourihane
2000-07-11	Merge XFree86 4.0.1	Alan Hourihane
2000-07-10	Import of XFree86 4.0.1	Alan Hourihane
2000-07-01	Fix for agpgart module detection. If the kernel module has been configured	Gareth Hughes
	to use AGP, and the module is not present, fail gracefully instead of doing evil things.
2000-06-23	Update register definitions to match r128_reg.h	Gareth Hughes
2000-06-13	Merged bsd-1-0-1	Doug Rabson
2000-06-13	Unify code with kernel: Change some spacing in comments Add #include	Rik Faith
	<linux/config.h> to all *_drv.c files
2000-06-13	Update email addresses and copyright notices to reflect VA Linux Systems	Rik Faith
2000-06-12	Merging the ati-4-1-0 branch onto the trunk.	Gareth Hughes
2000-06-12	Merged the tdfx-2-0 branch onto the trunk	Daryll Strauss
2000-06-09	file mga_state.c was initially added on branch bsd-1-0-1-branch.	Doug Rabson
2000-06-09	file mga_drv.h was initially added on branch bsd-1-0-1-branch.	Doug Rabson
2000-06-09	file Makefile was initially added on branch bsd-1-0-1-branch.	Doug Rabson
2000-06-09	file mga_dma.c was initially added on branch bsd-1-0-1-branch.	Doug Rabson
2000-06-09	file mga_drv.c was initially added on branch bsd-1-0-1-branch.	Doug Rabson
2000-06-09	file mga_bufs.c was initially added on branch bsd-1-0-1-branch.	Doug Rabson
2000-06-09	file mga_context.c was initially added on branch bsd-1-0-1-branch.	Doug Rabson
2000-06-09	file mga_drm.h was initially added on branch bsd-1-0-1-branch.	Doug Rabson
2000-06-09	Fix define of PCI_DEVICE_ID_3DLABS_GAMMA when not available in the kernel	Alan Hourihane
	includes.
2000-06-08	don't draw if window is unmapped, other updates (Jeff Hartmann)	Brian Paul
2000-06-08	Merged glxmisc-3-0-0	Brian Paul
2000-06-06	define VM_DONTCOPY to zero if undefined	Brian Paul
2000-06-05	Include new updated gamma support.	Alan Hourihane
2000-05-31	file ctxbitmap.c was initially added on branch bsd-1-0-1-branch.	Doug Rabson
2000-05-30	Merged bsd-1-0-0	Doug Rabson
2000-05-30	file r128_drm.h was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-26	Fixed WARP pipe hangs in Quake 3. Fullscreen or window at (0,0) seems to	Gareth Hughes
	work fine now, but an offset window still hangs in the same places as before.
2000-05-25	Merged mga-0-0-3-branch	Keith Whitwell
	- New security model for i810 - Enable i810 dri by default - New indexed vertex path for mga - Mga kernel driver rework - Removed dead files in i810 driver
2000-05-22	file agpsupport.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-18	Merged ati-4-0-1	Kevin E Martin
2000-05-07	file tdfx_drv.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file tdfx_context.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file Makefile was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file tdfx_drv.h was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file gamma_drv.h was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file gamma_dma.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file gamma_drv.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file lock.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file memory.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file vm.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file drmstat.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file fops.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file init.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file proc.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file lists.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file sysctl.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file context.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file ioctl.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file dma.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson
2000-05-07	file bufs.c was initially added on branch bsd-1-0-0-branch.	Doug Rabson

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generated by cgit v1.2.3 (git 2.25.1) at 2026-07-04 04:17:02 +0000

/* savage_bci.c -- BCI support for Savage
 *
 * Copyright 2004  Felix Kuehling
 * 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 FELIX KUEHLING 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 "drmP.h"
#include "savage_drm.h"
#include "savage_drv.h"

/* Need a long timeout for shadow status updates can take a while
 * and so can waiting for events when the queue is full. */
#define SAVAGE_DEFAULT_USEC_TIMEOUT	1000000 /* 1s */
#define SAVAGE_EVENT_USEC_TIMEOUT	5000000 /* 5s */
#define SAVAGE_FREELIST_DEBUG		0

static int
savage_bci_wait_fifo_shadow(drm_savage_private_t *dev_priv, unsigned int n)
{
	uint32_t mask = dev_priv->status_used_mask;
	uint32_t threshold = dev_priv->bci_threshold_hi;
	uint32_t status;
	int i;

#if SAVAGE_BCI_DEBUG
	if (n > dev_priv->cob_size + SAVAGE_BCI_FIFO_SIZE - threshold)
		DRM_ERROR("Trying to emit %d words "
			  "(more than guaranteed space in COB)\n", n);
#endif

	for (i = 0; i < SAVAGE_DEFAULT_USEC_TIMEOUT; i++) {
		DRM_MEMORYBARRIER();
		status = dev_priv->status_ptr[0];
		if ((status & mask) < threshold)
			return 0;
		DRM_UDELAY(1);
	}

#if SAVAGE_BCI_DEBUG
	DRM_ERROR("failed!\n");
	DRM_INFO("   status=0x%08x, threshold=0x%08x\n", status, threshold);
#endif
	return DRM_ERR(EBUSY);
}

static int
savage_bci_wait_fifo_s3d(drm_savage_private_t *dev_priv, unsigned int n)
{
	uint32_t maxUsed = dev_priv->cob_size + SAVAGE_BCI_FIFO_SIZE - n;
	uint32_t status;
	int i;

	for (i = 0; i < SAVAGE_DEFAULT_USEC_TIMEOUT; i++) {
		status = SAVAGE_READ(SAVAGE_STATUS_WORD0);
		if ((status & SAVAGE_FIFO_USED_MASK_S3D) <= maxUsed)
			return 0;
		DRM_UDELAY(1);
	}

#if SAVAGE_BCI_DEBUG
	DRM_ERROR("failed!\n");
	DRM_INFO("   status=0x%08x\n", status);
#endif
	return DRM_ERR(EBUSY);
}

static int
savage_bci_wait_fifo_s4(drm_savage_private_t *dev_priv, unsigned int n)
{
	uint32_t maxUsed = dev_priv->cob_size + SAVAGE_BCI_FIFO_SIZE - n;
	uint32_t status;
	int i;

	for (i = 0; i < SAVAGE_DEFAULT_USEC_TIMEOUT; i++) {
		status = SAVAGE_READ(SAVAGE_ALT_STATUS_WORD0);
		if ((status & SAVAGE_FIFO_USED_MASK_S4) <= maxUsed)
			return 0;
		DRM_UDELAY(1);
	}

#if SAVAGE_BCI_DEBUG
	DRM_ERROR("failed!\n");
	DRM_INFO("   status=0x%08x\n", status);
#endif
	return DRM_ERR(EBUSY);
}

/*
 * Waiting for events.
 *
 * The BIOSresets the event tag to 0 on mode changes. Therefore we
 * never emit 0 to the event tag. If we find a 0 event tag we know the
 * BIOS stomped on it and return success assuming that the BIOS waited
 * for engine idle.
 *
 * Note: if the Xserver uses the event tag it has to follow the same
 * rule. Otherwise there may be glitches every 2^16 events.
 */
static int
savage_bci_wait_event_shadow(drm_savage_private_t *dev_priv, uint16_t e)
{
	uint32_t status;
	int i;

	for (i = 0; i < SAVAGE_EVENT_USEC_TIMEOUT; i++) {
		DRM_MEMORYBARRIER();
		status = dev_priv->status_ptr[1];
		if ((((status & 0xffff) - e) & 0xffff) <= 0x7fff ||
		    (status & 0xffff) == 0)
			return 0;
		DRM_UDELAY(1);
	}

#if SAVAGE_BCI_DEBUG
	DRM_ERROR("failed!\n");
	DRM_INFO("   status=0x%08x, e=0x%04x\n", status, e);
#endif

	return DRM_ERR(EBUSY);
}

static int
savage_bci_wait_event_reg(drm_savage_private_t *dev_priv, uint16_t e)
{
	uint32_t status;
	int i;

	for (i = 0; i < SAVAGE_EVENT_USEC_TIMEOUT; i++) {
		status = SAVAGE_READ(SAVAGE_STATUS_WORD1);
		if ((((status & 0xffff) - e) & 0xffff) <= 0x7fff ||
		    (status & 0xffff) == 0)
			return 0;
		DRM_UDELAY(1);
	}

#if SAVAGE_BCI_DEBUG
	DRM_ERROR("failed!\n");
	DRM_INFO("   status=0x%08x, e=0x%04x\n", status, e);
#endif

	return DRM_ERR(EBUSY);
}

uint16_t savage_bci_emit_event(drm_savage_private_t *dev_priv,
			       unsigned int flags)
{
	uint16_t count;
	BCI_LOCALS;

	if (dev_priv->status_ptr) {
		/* coordinate with Xserver */
		count = dev_priv->status_ptr[1023];
		if (count < dev_priv->event_counter)
			dev_priv->event_wrap++;
	} else {
		count = dev_priv->event_counter;
	}
	count = (count + 1) & 0xffff;
	if (count == 0) {
		count++; /* See the comment above savage_wait_event_*. */
		dev_priv->event_wrap++;
	}
	dev_priv->event_counter = count;
	if (dev_priv->status_ptr)
		dev_priv->status_ptr[1023] = (uint32_t)count;

	if ((flags & (SAVAGE_WAIT_2D | SAVAGE_WAIT_3D))) {
		unsigned int wait_cmd = BCI_CMD_WAIT;
		if ((flags & SAVAGE_WAIT_2D))
			wait_cmd |= BCI_CMD_WAIT_2D;
		if ((flags & SAVAGE_WAIT_3D))
			wait_cmd |= BCI_CMD_WAIT_3D;
		BEGIN_BCI(2);
		BCI_WRITE(wait_cmd);
	} else {
		BEGIN_BCI(1);
	}
	BCI_WRITE(BCI_CMD_UPDATE_EVENT_TAG | (uint32_t)count);

	return count;
}

/*
 * Freelist management
 */
static int savage_freelist_init(drm_device_t *dev)
{
	drm_savage_private_t *dev_priv = dev->dev_private;
	drm_device_dma_t *dma = dev->dma;
	drm_buf_t *buf;
	drm_savage_buf_priv_t *entry;
	int i;
	DRM_DEBUG("count=%d\n", dma->buf_count);

	dev_priv->head.next = &dev_priv->tail;
	dev_priv->head.prev = NULL;
	dev_priv->head.buf = NULL;

	dev_priv->tail.next = NULL;
	dev_priv->tail.prev = &dev_priv->head;
	dev_priv->tail.buf = NULL;

	for (i = 0; i < dma->buf_count; i++) {
		buf = dma->buflist[i];
		entry = buf->dev_private;

		SET_AGE(&entry->age, 0, 0);
		entry->buf = buf;

		entry->next = dev_priv->head.next;
		entry->prev = &dev_priv->head;
		dev_priv->head.next->prev = entry;
		dev_priv->head.next = entry;
	}

	return 0;
}

static drm_buf_t *savage_freelist_get(drm_device_t *dev)
{
	drm_savage_private_t *dev_priv = dev->dev_private;
	drm_savage_buf_priv_t *tail = dev_priv->tail.prev;
	uint16_t event;
	unsigned int wrap;
	DRM_DEBUG("\n");

	UPDATE_EVENT_COUNTER();
	if (dev_priv->status_ptr)
		event = dev_priv->status_ptr[1] & 0xffff;
	else
		event = SAVAGE_READ(SAVAGE_STATUS_WORD1) & 0xffff;
	wrap = dev_priv->event_wrap;
	if (event > dev_priv->event_counter)
		wrap--; /* hardware hasn't passed the last wrap yet */

	DRM_DEBUG("   tail=0x%04x %d\n", tail->age.event, tail->age.wrap);
	DRM_DEBUG("   head=0x%04x %d\n", event, wrap);

	if (tail->buf && (TEST_AGE(&tail->age, event, wrap) || event == 0)) {
		drm_savage_buf_priv_t *next = tail->next;
		drm_savage_buf_priv_t *prev = tail->prev;
		prev->next = next;
		next->prev = prev;
		tail->next = tail->prev = NULL;
		return tail->buf;
	}

	DRM_DEBUG("returning NULL, tail->buf=%p!\n", tail->buf);
	return NULL;
}

void savage_freelist_put(drm_device_t *dev, drm_buf_t *buf)
{
	drm_savage_private_t *dev_priv = dev->dev_private;
	drm_savage_buf_priv_t *entry = buf->dev_private, *prev, *next;

	DRM_DEBUG("age=0x%04x wrap=%d\n", entry->age.event, entry->age.wrap);

	if (entry->next != NULL || entry->prev != NULL) {
		DRM_ERROR("entry already on freelist.\n");
		return;
	}

	prev = &dev_priv->head;
	next = prev->next;
	prev->next = entry;
	next->prev = entry;
	entry->prev = prev;
	entry->next = next;
}

/*
 * Command DMA
 */
static int savage_dma_init(drm_savage_private_t *dev_priv)
{
	unsigned int i;

	dev_priv->nr_dma_pages = dev_priv->cmd_dma->size /
		(SAVAGE_DMA_PAGE_SIZE*4);
	dev_priv->dma_pages = drm_alloc(sizeof(drm_savage_dma_page_t) *
					dev_priv->nr_dma_pages, DRM_MEM_DRIVER);
	if (dev_priv->dma_pages == NULL)
		return DRM_ERR(ENOMEM);

	for (i = 0; i < dev_priv->nr_dma_pages; ++i) {
		SET_AGE(&dev_priv->dma_pages[i].age, 0, 0);
		dev_priv->dma_pages[i].used = 0;
		dev_priv->dma_pages[i].flushed = 0;
	}
	SET_AGE(&dev_priv->last_dma_age, 0, 0);

	dev_priv->first_dma_page = 0;
	dev_priv->current_dma_page = 0;

	return 0;
}

void savage_dma_reset(drm_savage_private_t *dev_priv)
{
	uint16_t event;
	unsigned int wrap, i;
	event = savage_bci_emit_event(dev_priv, 0);
	wrap = dev_priv->event_wrap;
	for (i = 0; i < dev_priv->nr_dma_pages; ++i) {