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Diffstat (limited to '')
| -rw-r--r-- | drivers/gpu/drm/r128/r128_cce.c | 945 |
1 files changed, 945 insertions, 0 deletions
diff --git a/drivers/gpu/drm/r128/r128_cce.c b/drivers/gpu/drm/r128/r128_cce.c new file mode 100644 index 000000000..138af3248 --- /dev/null +++ b/drivers/gpu/drm/r128/r128_cce.c @@ -0,0 +1,945 @@ +/* r128_cce.c -- ATI Rage 128 driver -*- linux-c -*- + * Created: Wed Apr 5 19:24:19 2000 by kevin@precisioninsight.com + */ +/* + * Copyright 2000 Precision Insight, Inc., Cedar Park, Texas. + * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. + * 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, sublicense, + * 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 NONINFRINGEMENT. IN NO EVENT SHALL + * PRECISION INSIGHT 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. + * + * Authors: + * Gareth Hughes <gareth@valinux.com> + */ + +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/firmware.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/uaccess.h> + +#include <drm/drm_agpsupport.h> +#include <drm/drm_device.h> +#include <drm/drm_file.h> +#include <drm/drm_irq.h> +#include <drm/drm_print.h> +#include <drm/r128_drm.h> + +#include "r128_drv.h" + +#define R128_FIFO_DEBUG 0 + +#define FIRMWARE_NAME "r128/r128_cce.bin" + +MODULE_FIRMWARE(FIRMWARE_NAME); + +static int R128_READ_PLL(struct drm_device *dev, int addr) +{ + drm_r128_private_t *dev_priv = dev->dev_private; + + R128_WRITE8(R128_CLOCK_CNTL_INDEX, addr & 0x1f); + return R128_READ(R128_CLOCK_CNTL_DATA); +} + +#if R128_FIFO_DEBUG +static void r128_status(drm_r128_private_t *dev_priv) +{ + printk("GUI_STAT = 0x%08x\n", + (unsigned int)R128_READ(R128_GUI_STAT)); + printk("PM4_STAT = 0x%08x\n", + (unsigned int)R128_READ(R128_PM4_STAT)); + printk("PM4_BUFFER_DL_WPTR = 0x%08x\n", + (unsigned int)R128_READ(R128_PM4_BUFFER_DL_WPTR)); + printk("PM4_BUFFER_DL_RPTR = 0x%08x\n", + (unsigned int)R128_READ(R128_PM4_BUFFER_DL_RPTR)); + printk("PM4_MICRO_CNTL = 0x%08x\n", + (unsigned int)R128_READ(R128_PM4_MICRO_CNTL)); + printk("PM4_BUFFER_CNTL = 0x%08x\n", + (unsigned int)R128_READ(R128_PM4_BUFFER_CNTL)); +} +#endif + +/* ================================================================ + * Engine, FIFO control + */ + +static int r128_do_pixcache_flush(drm_r128_private_t *dev_priv) +{ + u32 tmp; + int i; + + tmp = R128_READ(R128_PC_NGUI_CTLSTAT) | R128_PC_FLUSH_ALL; + R128_WRITE(R128_PC_NGUI_CTLSTAT, tmp); + + for (i = 0; i < dev_priv->usec_timeout; i++) { + if (!(R128_READ(R128_PC_NGUI_CTLSTAT) & R128_PC_BUSY)) + return 0; + udelay(1); + } + +#if R128_FIFO_DEBUG + DRM_ERROR("failed!\n"); +#endif + return -EBUSY; +} + +static int r128_do_wait_for_fifo(drm_r128_private_t *dev_priv, int entries) +{ + int i; + + for (i = 0; i < dev_priv->usec_timeout; i++) { + int slots = R128_READ(R128_GUI_STAT) & R128_GUI_FIFOCNT_MASK; + if (slots >= entries) + return 0; + udelay(1); + } + +#if R128_FIFO_DEBUG + DRM_ERROR("failed!\n"); +#endif + return -EBUSY; +} + +static int r128_do_wait_for_idle(drm_r128_private_t *dev_priv) +{ + int i, ret; + + ret = r128_do_wait_for_fifo(dev_priv, 64); + if (ret) + return ret; + + for (i = 0; i < dev_priv->usec_timeout; i++) { + if (!(R128_READ(R128_GUI_STAT) & R128_GUI_ACTIVE)) { + r128_do_pixcache_flush(dev_priv); + return 0; + } + udelay(1); + } + +#if R128_FIFO_DEBUG + DRM_ERROR("failed!\n"); +#endif + return -EBUSY; +} + +/* ================================================================ + * CCE control, initialization + */ + +/* Load the microcode for the CCE */ +static int r128_cce_load_microcode(drm_r128_private_t *dev_priv) +{ + struct platform_device *pdev; + const struct firmware *fw; + const __be32 *fw_data; + int rc, i; + + DRM_DEBUG("\n"); + + pdev = platform_device_register_simple("r128_cce", 0, NULL, 0); + if (IS_ERR(pdev)) { + pr_err("r128_cce: Failed to register firmware\n"); + return PTR_ERR(pdev); + } + rc = request_firmware(&fw, FIRMWARE_NAME, &pdev->dev); + platform_device_unregister(pdev); + if (rc) { + pr_err("r128_cce: Failed to load firmware \"%s\"\n", + FIRMWARE_NAME); + return rc; + } + + if (fw->size != 256 * 8) { + pr_err("r128_cce: Bogus length %zu in firmware \"%s\"\n", + fw->size, FIRMWARE_NAME); + rc = -EINVAL; + goto out_release; + } + + r128_do_wait_for_idle(dev_priv); + + fw_data = (const __be32 *)fw->data; + R128_WRITE(R128_PM4_MICROCODE_ADDR, 0); + for (i = 0; i < 256; i++) { + R128_WRITE(R128_PM4_MICROCODE_DATAH, + be32_to_cpup(&fw_data[i * 2])); + R128_WRITE(R128_PM4_MICROCODE_DATAL, + be32_to_cpup(&fw_data[i * 2 + 1])); + } + +out_release: + release_firmware(fw); + return rc; +} + +/* Flush any pending commands to the CCE. This should only be used just + * prior to a wait for idle, as it informs the engine that the command + * stream is ending. + */ +static void r128_do_cce_flush(drm_r128_private_t *dev_priv) +{ + u32 tmp; + + tmp = R128_READ(R128_PM4_BUFFER_DL_WPTR) | R128_PM4_BUFFER_DL_DONE; + R128_WRITE(R128_PM4_BUFFER_DL_WPTR, tmp); +} + +/* Wait for the CCE to go idle. + */ +int r128_do_cce_idle(drm_r128_private_t *dev_priv) +{ + int i; + + for (i = 0; i < dev_priv->usec_timeout; i++) { + if (GET_RING_HEAD(dev_priv) == dev_priv->ring.tail) { + int pm4stat = R128_READ(R128_PM4_STAT); + if (((pm4stat & R128_PM4_FIFOCNT_MASK) >= + dev_priv->cce_fifo_size) && + !(pm4stat & (R128_PM4_BUSY | + R128_PM4_GUI_ACTIVE))) { + return r128_do_pixcache_flush(dev_priv); + } + } + udelay(1); + } + +#if R128_FIFO_DEBUG + DRM_ERROR("failed!\n"); + r128_status(dev_priv); +#endif + return -EBUSY; +} + +/* Start the Concurrent Command Engine. + */ +static void r128_do_cce_start(drm_r128_private_t *dev_priv) +{ + r128_do_wait_for_idle(dev_priv); + + R128_WRITE(R128_PM4_BUFFER_CNTL, + dev_priv->cce_mode | dev_priv->ring.size_l2qw + | R128_PM4_BUFFER_CNTL_NOUPDATE); + R128_READ(R128_PM4_BUFFER_ADDR); /* as per the sample code */ + R128_WRITE(R128_PM4_MICRO_CNTL, R128_PM4_MICRO_FREERUN); + + dev_priv->cce_running = 1; +} + +/* Reset the Concurrent Command Engine. This will not flush any pending + * commands, so you must wait for the CCE command stream to complete + * before calling this routine. + */ +static void r128_do_cce_reset(drm_r128_private_t *dev_priv) +{ + R128_WRITE(R128_PM4_BUFFER_DL_WPTR, 0); + R128_WRITE(R128_PM4_BUFFER_DL_RPTR, 0); + dev_priv->ring.tail = 0; +} + +/* Stop the Concurrent Command Engine. This will not flush any pending + * commands, so you must flush the command stream and wait for the CCE + * to go idle before calling this routine. + */ +static void r128_do_cce_stop(drm_r128_private_t *dev_priv) +{ + R128_WRITE(R128_PM4_MICRO_CNTL, 0); + R128_WRITE(R128_PM4_BUFFER_CNTL, + R128_PM4_NONPM4 | R128_PM4_BUFFER_CNTL_NOUPDATE); + + dev_priv->cce_running = 0; +} + +/* Reset the engine. This will stop the CCE if it is running. + */ +static int r128_do_engine_reset(struct drm_device *dev) +{ + drm_r128_private_t *dev_priv = dev->dev_private; + u32 clock_cntl_index, mclk_cntl, gen_reset_cntl; + + r128_do_pixcache_flush(dev_priv); + + clock_cntl_index = R128_READ(R128_CLOCK_CNTL_INDEX); + mclk_cntl = R128_READ_PLL(dev, R128_MCLK_CNTL); + + R128_WRITE_PLL(R128_MCLK_CNTL, + mclk_cntl | R128_FORCE_GCP | R128_FORCE_PIPE3D_CP); + + gen_reset_cntl = R128_READ(R128_GEN_RESET_CNTL); + + /* Taken from the sample code - do not change */ + R128_WRITE(R128_GEN_RESET_CNTL, gen_reset_cntl | R128_SOFT_RESET_GUI); + R128_READ(R128_GEN_RESET_CNTL); + R128_WRITE(R128_GEN_RESET_CNTL, gen_reset_cntl & ~R128_SOFT_RESET_GUI); + R128_READ(R128_GEN_RESET_CNTL); + + R128_WRITE_PLL(R128_MCLK_CNTL, mclk_cntl); + R128_WRITE(R128_CLOCK_CNTL_INDEX, clock_cntl_index); + R128_WRITE(R128_GEN_RESET_CNTL, gen_reset_cntl); + + /* Reset the CCE ring */ + r128_do_cce_reset(dev_priv); + + /* The CCE is no longer running after an engine reset */ + dev_priv->cce_running = 0; + + /* Reset any pending vertex, indirect buffers */ + r128_freelist_reset(dev); + + return 0; +} + +static void r128_cce_init_ring_buffer(struct drm_device *dev, + drm_r128_private_t *dev_priv) +{ + u32 ring_start; + u32 tmp; + + DRM_DEBUG("\n"); + + /* The manual (p. 2) says this address is in "VM space". This + * means it's an offset from the start of AGP space. + */ +#if IS_ENABLED(CONFIG_AGP) + if (!dev_priv->is_pci) + ring_start = dev_priv->cce_ring->offset - dev->agp->base; + else +#endif + ring_start = dev_priv->cce_ring->offset - + (unsigned long)dev->sg->virtual; + + R128_WRITE(R128_PM4_BUFFER_OFFSET, ring_start | R128_AGP_OFFSET); + + R128_WRITE(R128_PM4_BUFFER_DL_WPTR, 0); + R128_WRITE(R128_PM4_BUFFER_DL_RPTR, 0); + + /* Set watermark control */ + R128_WRITE(R128_PM4_BUFFER_WM_CNTL, + ((R128_WATERMARK_L / 4) << R128_WMA_SHIFT) + | ((R128_WATERMARK_M / 4) << R128_WMB_SHIFT) + | ((R128_WATERMARK_N / 4) << R128_WMC_SHIFT) + | ((R128_WATERMARK_K / 64) << R128_WB_WM_SHIFT)); + + /* Force read. Why? Because it's in the examples... */ + R128_READ(R128_PM4_BUFFER_ADDR); + + /* Turn on bus mastering */ + tmp = R128_READ(R128_BUS_CNTL) & ~R128_BUS_MASTER_DIS; + R128_WRITE(R128_BUS_CNTL, tmp); +} + +static int r128_do_init_cce(struct drm_device *dev, drm_r128_init_t *init) +{ + drm_r128_private_t *dev_priv; + int rc; + + DRM_DEBUG("\n"); + + if (dev->dev_private) { + DRM_DEBUG("called when already initialized\n"); + return -EINVAL; + } + + dev_priv = kzalloc(sizeof(drm_r128_private_t), GFP_KERNEL); + if (dev_priv == NULL) + return -ENOMEM; + + dev_priv->is_pci = init->is_pci; + + if (dev_priv->is_pci && !dev->sg) { + DRM_ERROR("PCI GART memory not allocated!\n"); + dev->dev_private = (void *)dev_priv; + r128_do_cleanup_cce(dev); + return -EINVAL; + } + + dev_priv->usec_timeout = init->usec_timeout; + if (dev_priv->usec_timeout < 1 || + dev_priv->usec_timeout > R128_MAX_USEC_TIMEOUT) { + DRM_DEBUG("TIMEOUT problem!\n"); + dev->dev_private = (void *)dev_priv; + r128_do_cleanup_cce(dev); + return -EINVAL; + } + + dev_priv->cce_mode = init->cce_mode; + + /* GH: Simple idle check. + */ + atomic_set(&dev_priv->idle_count, 0); + + /* We don't support anything other than bus-mastering ring mode, + * but the ring can be in either AGP or PCI space for the ring + * read pointer. + */ + if ((init->cce_mode != R128_PM4_192BM) && + (init->cce_mode != R128_PM4_128BM_64INDBM) && + (init->cce_mode != R128_PM4_64BM_128INDBM) && + (init->cce_mode != R128_PM4_64BM_64VCBM_64INDBM)) { + DRM_DEBUG("Bad cce_mode!\n"); + dev->dev_private = (void *)dev_priv; + r128_do_cleanup_cce(dev); + return -EINVAL; + } + + switch (init->cce_mode) { + case R128_PM4_NONPM4: + dev_priv->cce_fifo_size = 0; + break; + case R128_PM4_192PIO: + case R128_PM4_192BM: + dev_priv->cce_fifo_size = 192; + break; + case R128_PM4_128PIO_64INDBM: + case R128_PM4_128BM_64INDBM: + dev_priv->cce_fifo_size = 128; + break; + case R128_PM4_64PIO_128INDBM: + case R128_PM4_64BM_128INDBM: + case R128_PM4_64PIO_64VCBM_64INDBM: + case R128_PM4_64BM_64VCBM_64INDBM: + case R128_PM4_64PIO_64VCPIO_64INDPIO: + dev_priv->cce_fifo_size = 64; + break; + } + + switch (init->fb_bpp) { + case 16: + dev_priv->color_fmt = R128_DATATYPE_RGB565; + break; + case 32: + default: + dev_priv->color_fmt = R128_DATATYPE_ARGB8888; + break; + } + dev_priv->front_offset = init->front_offset; + dev_priv->front_pitch = init->front_pitch; + dev_priv->back_offset = init->back_offset; + dev_priv->back_pitch = init->back_pitch; + + switch (init->depth_bpp) { + case 16: + dev_priv->depth_fmt = R128_DATATYPE_RGB565; + break; + case 24: + case 32: + default: + dev_priv->depth_fmt = R128_DATATYPE_ARGB8888; + break; + } + dev_priv->depth_offset = init->depth_offset; + dev_priv->depth_pitch = init->depth_pitch; + dev_priv->span_offset = init->span_offset; + + dev_priv->front_pitch_offset_c = (((dev_priv->front_pitch / 8) << 21) | + (dev_priv->front_offset >> 5)); + dev_priv->back_pitch_offset_c = (((dev_priv->back_pitch / 8) << 21) | + (dev_priv->back_offset >> 5)); + dev_priv->depth_pitch_offset_c = (((dev_priv->depth_pitch / 8) << 21) | + (dev_priv->depth_offset >> 5) | + R128_DST_TILE); + dev_priv->span_pitch_offset_c = (((dev_priv->depth_pitch / 8) << 21) | + (dev_priv->span_offset >> 5)); + + dev_priv->sarea = drm_legacy_getsarea(dev); + if (!dev_priv->sarea) { + DRM_ERROR("could not find sarea!\n"); + dev->dev_private = (void *)dev_priv; + r128_do_cleanup_cce(dev); + return -EINVAL; + } + + dev_priv->mmio = drm_legacy_findmap(dev, init->mmio_offset); + if (!dev_priv->mmio) { + DRM_ERROR("could not find mmio region!\n"); + dev->dev_private = (void *)dev_priv; + r128_do_cleanup_cce(dev); + return -EINVAL; + } + dev_priv->cce_ring = drm_legacy_findmap(dev, init->ring_offset); + if (!dev_priv->cce_ring) { + DRM_ERROR("could not find cce ring region!\n"); + dev->dev_private = (void *)dev_priv; + r128_do_cleanup_cce(dev); + return -EINVAL; + } + dev_priv->ring_rptr = drm_legacy_findmap(dev, init->ring_rptr_offset); + if (!dev_priv->ring_rptr) { + DRM_ERROR("could not find ring read pointer!\n"); + dev->dev_private = (void *)dev_priv; + r128_do_cleanup_cce(dev); + return -EINVAL; + } + dev->agp_buffer_token = init->buffers_offset; + dev->agp_buffer_map = drm_legacy_findmap(dev, init->buffers_offset); + if (!dev->agp_buffer_map) { + DRM_ERROR("could not find dma buffer region!\n"); + dev->dev_private = (void *)dev_priv; + r128_do_cleanup_cce(dev); + return -EINVAL; + } + + if (!dev_priv->is_pci) { + dev_priv->agp_textures = + drm_legacy_findmap(dev, init->agp_textures_offset); + if (!dev_priv->agp_textures) { + DRM_ERROR("could not find agp texture region!\n"); + dev->dev_private = (void *)dev_priv; + r128_do_cleanup_cce(dev); + return -EINVAL; + } + } + + dev_priv->sarea_priv = + (drm_r128_sarea_t *) ((u8 *) dev_priv->sarea->handle + + init->sarea_priv_offset); + +#if IS_ENABLED(CONFIG_AGP) + if (!dev_priv->is_pci) { + drm_legacy_ioremap_wc(dev_priv->cce_ring, dev); + drm_legacy_ioremap_wc(dev_priv->ring_rptr, dev); + drm_legacy_ioremap_wc(dev->agp_buffer_map, dev); + if (!dev_priv->cce_ring->handle || + !dev_priv->ring_rptr->handle || + !dev->agp_buffer_map->handle) { + DRM_ERROR("Could not ioremap agp regions!\n"); + dev->dev_private = (void *)dev_priv; + r128_do_cleanup_cce(dev); + return -ENOMEM; + } + } else +#endif + { + dev_priv->cce_ring->handle = + (void *)(unsigned long)dev_priv->cce_ring->offset; + dev_priv->ring_rptr->handle = + (void *)(unsigned long)dev_priv->ring_rptr->offset; + dev->agp_buffer_map->handle = + (void *)(unsigned long)dev->agp_buffer_map->offset; + } + +#if IS_ENABLED(CONFIG_AGP) + if (!dev_priv->is_pci) + dev_priv->cce_buffers_offset = dev->agp->base; + else +#endif + dev_priv->cce_buffers_offset = (unsigned long)dev->sg->virtual; + + dev_priv->ring.start = (u32 *) dev_priv->cce_ring->handle; + dev_priv->ring.end = ((u32 *) dev_priv->cce_ring->handle + + init->ring_size / sizeof(u32)); + dev_priv->ring.size = init->ring_size; + dev_priv->ring.size_l2qw = order_base_2(init->ring_size / 8); + + dev_priv->ring.tail_mask = (dev_priv->ring.size / sizeof(u32)) - 1; + + dev_priv->ring.high_mark = 128; + + dev_priv->sarea_priv->last_frame = 0; + R128_WRITE(R128_LAST_FRAME_REG, dev_priv->sarea_priv->last_frame); + + dev_priv->sarea_priv->last_dispatch = 0; + R128_WRITE(R128_LAST_DISPATCH_REG, dev_priv->sarea_priv->last_dispatch); + +#if IS_ENABLED(CONFIG_AGP) + if (dev_priv->is_pci) { +#endif + dev_priv->gart_info.table_mask = DMA_BIT_MASK(32); + dev_priv->gart_info.gart_table_location = DRM_ATI_GART_MAIN; + dev_priv->gart_info.table_size = R128_PCIGART_TABLE_SIZE; + dev_priv->gart_info.addr = NULL; + dev_priv->gart_info.bus_addr = 0; + dev_priv->gart_info.gart_reg_if = DRM_ATI_GART_PCI; + rc = drm_ati_pcigart_init(dev, &dev_priv->gart_info); + if (rc) { + DRM_ERROR("failed to init PCI GART!\n"); + dev->dev_private = (void *)dev_priv; + r128_do_cleanup_cce(dev); + return rc; + } + R128_WRITE(R128_PCI_GART_PAGE, dev_priv->gart_info.bus_addr); +#if IS_ENABLED(CONFIG_AGP) + } +#endif + + r128_cce_init_ring_buffer(dev, dev_priv); + rc = r128_cce_load_microcode(dev_priv); + + dev->dev_private = (void *)dev_priv; + + r128_do_engine_reset(dev); + + if (rc) { + DRM_ERROR("Failed to load firmware!\n"); + r128_do_cleanup_cce(dev); + } + + return rc; +} + +int r128_do_cleanup_cce(struct drm_device *dev) +{ + + /* Make sure interrupts are disabled here because the uninstall ioctl + * may not have been called from userspace and after dev_private + * is freed, it's too late. + */ + if (dev->irq_enabled) + drm_irq_uninstall(dev); + + if (dev->dev_private) { + drm_r128_private_t *dev_priv = dev->dev_private; + +#if IS_ENABLED(CONFIG_AGP) + if (!dev_priv->is_pci) { + if (dev_priv->cce_ring != NULL) + drm_legacy_ioremapfree(dev_priv->cce_ring, dev); + if (dev_priv->ring_rptr != NULL) + drm_legacy_ioremapfree(dev_priv->ring_rptr, dev); + if (dev->agp_buffer_map != NULL) { + drm_legacy_ioremapfree(dev->agp_buffer_map, dev); + dev->agp_buffer_map = NULL; + } + } else +#endif + { + if (dev_priv->gart_info.bus_addr) + if (!drm_ati_pcigart_cleanup(dev, + &dev_priv->gart_info)) + DRM_ERROR + ("failed to cleanup PCI GART!\n"); + } + + kfree(dev->dev_private); + dev->dev_private = NULL; + } + + return 0; +} + +int r128_cce_init(struct drm_device *dev, void *data, struct drm_file *file_priv) +{ + drm_r128_init_t *init = data; + + DRM_DEBUG("\n"); + + LOCK_TEST_WITH_RETURN(dev, file_priv); + + switch (init->func) { + case R128_INIT_CCE: + return r128_do_init_cce(dev, init); + case R128_CLEANUP_CCE: + return r128_do_cleanup_cce(dev); + } + + return -EINVAL; +} + +int r128_cce_start(struct drm_device *dev, void *data, struct drm_file *file_priv) +{ + drm_r128_private_t *dev_priv = dev->dev_private; + DRM_DEBUG("\n"); + + LOCK_TEST_WITH_RETURN(dev, file_priv); + + DEV_INIT_TEST_WITH_RETURN(dev_priv); + + if (dev_priv->cce_running || dev_priv->cce_mode == R128_PM4_NONPM4) { + DRM_DEBUG("while CCE running\n"); + return 0; + } + + r128_do_cce_start(dev_priv); + + return 0; +} + +/* Stop the CCE. The engine must have been idled before calling this + * routine. + */ +int r128_cce_stop(struct drm_device *dev, void *data, struct drm_file *file_priv) +{ + drm_r128_private_t *dev_priv = dev->dev_private; + drm_r128_cce_stop_t *stop = data; + int ret; + DRM_DEBUG("\n"); + + LOCK_TEST_WITH_RETURN(dev, file_priv); + + DEV_INIT_TEST_WITH_RETURN(dev_priv); + + /* Flush any pending CCE commands. This ensures any outstanding + * commands are exectuted by the engine before we turn it off. + */ + if (stop->flush) + r128_do_cce_flush(dev_priv); + + /* If we fail to make the engine go idle, we return an error + * code so that the DRM ioctl wrapper can try again. + */ + if (stop->idle) { + ret = r128_do_cce_idle(dev_priv); + if (ret) + return ret; + } + + /* Finally, we can turn off the CCE. If the engine isn't idle, + * we will get some dropped triangles as they won't be fully + * rendered before the CCE is shut down. + */ + r128_do_cce_stop(dev_priv); + + /* Reset the engine */ + r128_do_engine_reset(dev); + + return 0; +} + +/* Just reset the CCE ring. Called as part of an X Server engine reset. + */ +int r128_cce_reset(struct drm_device *dev, void *data, struct drm_file *file_priv) +{ + drm_r128_private_t *dev_priv = dev->dev_private; + DRM_DEBUG("\n"); + + LOCK_TEST_WITH_RETURN(dev, file_priv); + + DEV_INIT_TEST_WITH_RETURN(dev_priv); + + r128_do_cce_reset(dev_priv); + + /* The CCE is no longer running after an engine reset */ + dev_priv->cce_running = 0; + + return 0; +} + +int r128_cce_idle(struct drm_device *dev, void *data, struct drm_file *file_priv) +{ + drm_r128_private_t *dev_priv = dev->dev_private; + DRM_DEBUG("\n"); + + LOCK_TEST_WITH_RETURN(dev, file_priv); + + DEV_INIT_TEST_WITH_RETURN(dev_priv); + + if (dev_priv->cce_running) + r128_do_cce_flush(dev_priv); + + return r128_do_cce_idle(dev_priv); +} + +int r128_engine_reset(struct drm_device *dev, void *data, struct drm_file *file_priv) +{ + DRM_DEBUG("\n"); + + LOCK_TEST_WITH_RETURN(dev, file_priv); + + DEV_INIT_TEST_WITH_RETURN(dev->dev_private); + + return r128_do_engine_reset(dev); +} + +int r128_fullscreen(struct drm_device *dev, void *data, struct drm_file *file_priv) +{ + return -EINVAL; +} + +/* ================================================================ + * Freelist management + */ +#define R128_BUFFER_USED 0xffffffff +#define R128_BUFFER_FREE 0 + +#if 0 +static int r128_freelist_init(struct drm_device *dev) +{ + struct drm_device_dma *dma = dev->dma; + drm_r128_private_t *dev_priv = dev->dev_private; + struct drm_buf *buf; + drm_r128_buf_priv_t *buf_priv; + drm_r128_freelist_t *entry; + int i; + + dev_priv->head = kzalloc(sizeof(drm_r128_freelist_t), GFP_KERNEL); + if (dev_priv->head == NULL) + return -ENOMEM; + + dev_priv->head->age = R128_BUFFER_USED; + + for (i = 0; i < dma->buf_count; i++) { + buf = dma->buflist[i]; + buf_priv = buf->dev_private; + + entry = kmalloc(sizeof(drm_r128_freelist_t), GFP_KERNEL); + if (!entry) + return -ENOMEM; + + entry->age = R128_BUFFER_FREE; + entry->buf = buf; + entry->prev = dev_priv->head; + entry->next = dev_priv->head->next; + if (!entry->next) + dev_priv->tail = entry; + + buf_priv->discard = 0; + buf_priv->dispatched = 0; + buf_priv->list_entry = entry; + + dev_priv->head->next = entry; + + if (dev_priv->head->next) + dev_priv->head->next->prev = entry; + } + + return 0; + +} +#endif + +static struct drm_buf *r128_freelist_get(struct drm_device * dev) +{ + struct drm_device_dma *dma = dev->dma; + drm_r128_private_t *dev_priv = dev->dev_private; + drm_r128_buf_priv_t *buf_priv; + struct drm_buf *buf; + int i, t; + + /* FIXME: Optimize -- use freelist code */ + + for (i = 0; i < dma->buf_count; i++) { + buf = dma->buflist[i]; + buf_priv = buf->dev_private; + if (!buf->file_priv) + return buf; + } + + for (t = 0; t < dev_priv->usec_timeout; t++) { + u32 done_age = R128_READ(R128_LAST_DISPATCH_REG); + + for (i = 0; i < dma->buf_count; i++) { + buf = dma->buflist[i]; + buf_priv = buf->dev_private; + if (buf->pending && buf_priv->age <= done_age) { + /* The buffer has been processed, so it + * can now be used. + */ + buf->pending = 0; + return buf; + } + } + udelay(1); + } + + DRM_DEBUG("returning NULL!\n"); + return NULL; +} + +void r128_freelist_reset(struct drm_device *dev) +{ + struct drm_device_dma *dma = dev->dma; + int i; + + for (i = 0; i < dma->buf_count; i++) { + struct drm_buf *buf = dma->buflist[i]; + drm_r128_buf_priv_t *buf_priv = buf->dev_private; + buf_priv->age = 0; + } +} + +/* ================================================================ + * CCE command submission + */ + +int r128_wait_ring(drm_r128_private_t *dev_priv, int n) +{ + drm_r128_ring_buffer_t *ring = &dev_priv->ring; + int i; + + for (i = 0; i < dev_priv->usec_timeout; i++) { + r128_update_ring_snapshot(dev_priv); + if (ring->space >= n) + return 0; + udelay(1); + } + + /* FIXME: This is being ignored... */ + DRM_ERROR("failed!\n"); + return -EBUSY; +} + +static int r128_cce_get_buffers(struct drm_device *dev, + struct drm_file *file_priv, + struct drm_dma *d) +{ + int i; + struct drm_buf *buf; + + for (i = d->granted_count; i < d->request_count; i++) { + buf = r128_freelist_get(dev); + if (!buf) + return -EAGAIN; + + buf->file_priv = file_priv; + + if (copy_to_user(&d->request_indices[i], &buf->idx, + sizeof(buf->idx))) + return -EFAULT; + if (copy_to_user(&d->request_sizes[i], &buf->total, + sizeof(buf->total))) + return -EFAULT; + + d->granted_count++; + } + return 0; +} + +int r128_cce_buffers(struct drm_device *dev, void *data, struct drm_file *file_priv) +{ + struct drm_device_dma *dma = dev->dma; + int ret = 0; + struct drm_dma *d = data; + + LOCK_TEST_WITH_RETURN(dev, file_priv); + + /* Please don't send us buffers. + */ + if (d->send_count != 0) { + DRM_ERROR("Process %d trying to send %d buffers via drmDMA\n", + task_pid_nr(current), d->send_count); + return -EINVAL; + } + + /* We'll send you buffers. + */ + if (d->request_count < 0 || d->request_count > dma->buf_count) { + DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n", + task_pid_nr(current), d->request_count, dma->buf_count); + return -EINVAL; + } + + d->granted_count = 0; + + if (d->request_count) + ret = r128_cce_get_buffers(dev, file_priv, d); + + return ret; +} |