// SPDX-License-Identifier: GPL-2.0-only /************************************************************************** * Copyright (c) 2007-2011, Intel Corporation. * All Rights Reserved. * * Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to * develop this driver. * **************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "psb_drv.h" #include "psb_reg.h" /** * psb_spank - reset the 2D engine * @dev_priv: our PSB DRM device * * Soft reset the graphics engine and then reload the necessary registers. * We use this at initialisation time but it will become relevant for * accelerated X later */ void psb_spank(struct drm_psb_private *dev_priv) { PSB_WSGX32(_PSB_CS_RESET_BIF_RESET | _PSB_CS_RESET_DPM_RESET | _PSB_CS_RESET_TA_RESET | _PSB_CS_RESET_USE_RESET | _PSB_CS_RESET_ISP_RESET | _PSB_CS_RESET_TSP_RESET | _PSB_CS_RESET_TWOD_RESET, PSB_CR_SOFT_RESET); PSB_RSGX32(PSB_CR_SOFT_RESET); msleep(1); PSB_WSGX32(0, PSB_CR_SOFT_RESET); wmb(); PSB_WSGX32(PSB_RSGX32(PSB_CR_BIF_CTRL) | _PSB_CB_CTRL_CLEAR_FAULT, PSB_CR_BIF_CTRL); wmb(); (void) PSB_RSGX32(PSB_CR_BIF_CTRL); msleep(1); PSB_WSGX32(PSB_RSGX32(PSB_CR_BIF_CTRL) & ~_PSB_CB_CTRL_CLEAR_FAULT, PSB_CR_BIF_CTRL); (void) PSB_RSGX32(PSB_CR_BIF_CTRL); PSB_WSGX32(dev_priv->gtt.gatt_start, PSB_CR_BIF_TWOD_REQ_BASE); } /** * psb2_2d_wait_available - wait for FIFO room * @dev_priv: our DRM device * @size: size (in dwords) of the command we want to issue * * Wait until there is room to load the FIFO with our data. If the * device is not responding then reset it */ static int psb_2d_wait_available(struct drm_psb_private *dev_priv, unsigned size) { uint32_t avail = PSB_RSGX32(PSB_CR_2D_SOCIF); unsigned long t = jiffies + HZ; while (avail < size) { avail = PSB_RSGX32(PSB_CR_2D_SOCIF); if (time_after(jiffies, t)) { psb_spank(dev_priv); return -EIO; } } return 0; } /** * psb_2d_submit - submit a 2D command * @dev_priv: our DRM device * @cmdbuf: command to issue * @size: length (in dwords) * * Issue one or more 2D commands to the accelerator. This needs to be * serialized later when we add the GEM interfaces for acceleration */ static int psbfb_2d_submit(struct drm_psb_private *dev_priv, uint32_t *cmdbuf, unsigned size) { int ret = 0; int i; unsigned submit_size; unsigned long flags; spin_lock_irqsave(&dev_priv->lock_2d, flags); while (size > 0) { submit_size = (size < 0x60) ? size : 0x60; size -= submit_size; ret = psb_2d_wait_available(dev_priv, submit_size); if (ret) break; submit_size <<= 2; for (i = 0; i < submit_size; i += 4) PSB_WSGX32(*cmdbuf++, PSB_SGX_2D_SLAVE_PORT + i); (void)PSB_RSGX32(PSB_SGX_2D_SLAVE_PORT + i - 4); } spin_unlock_irqrestore(&dev_priv->lock_2d, flags); return ret; } /** * psb_accel_2d_copy_direction - compute blit order * @xdir: X direction of move * @ydir: Y direction of move * * Compute the correct order setings to ensure that an overlapping blit * correctly copies all the pixels. */ static u32 psb_accel_2d_copy_direction(int xdir, int ydir) { if (xdir < 0) return (ydir < 0) ? PSB_2D_COPYORDER_BR2TL : PSB_2D_COPYORDER_TR2BL; else return (ydir < 0) ? PSB_2D_COPYORDER_BL2TR : PSB_2D_COPYORDER_TL2BR; } /** * psb_accel_2d_copy - accelerated 2D copy * @dev_priv: our DRM device * @src_offset in bytes * @src_stride in bytes * @src_format psb 2D format defines * @dst_offset in bytes * @dst_stride in bytes * @dst_format psb 2D format defines * @src_x offset in pixels * @src_y offset in pixels * @dst_x offset in pixels * @dst_y offset in pixels * @size_x of the copied area * @size_y of the copied area * * Format and issue a 2D accelerated copy command. */ static int psb_accel_2d_copy(struct drm_psb_private *dev_priv, uint32_t src_offset, uint32_t src_stride, uint32_t src_format, uint32_t dst_offset, uint32_t dst_stride, uint32_t dst_format, uint16_t src_x, uint16_t src_y, uint16_t dst_x, uint16_t dst_y, uint16_t size_x, uint16_t size_y) { uint32_t blit_cmd; uint32_t buffer[10]; uint32_t *buf; uint32_t direction; buf = buffer; direction = psb_accel_2d_copy_direction(src_x - dst_x, src_y - dst_y); if (direction == PSB_2D_COPYORDER_BR2TL || direction == PSB_2D_COPYORDER_TR2BL) { src_x += size_x - 1; dst_x += size_x - 1; } if (direction == PSB_2D_COPYORDER_BR2TL || direction == PSB_2D_COPYORDER_BL2TR) { src_y += size_y - 1; dst_y += size_y - 1; } blit_cmd = PSB_2D_BLIT_BH | PSB_2D_ROT_NONE | PSB_2D_DSTCK_DISABLE | PSB_2D_SRCCK_DISABLE | PSB_2D_USE_PAT | PSB_2D_ROP3_SRCCOPY | direction; *buf++ = PSB_2D_FENCE_BH; *buf++ = PSB_2D_DST_SURF_BH | dst_format | (dst_stride << PSB_2D_DST_STRIDE_SHIFT); *buf++ = dst_offset; *buf++ = PSB_2D_SRC_SURF_BH | src_format | (src_stride << PSB_2D_SRC_STRIDE_SHIFT); *buf++ = src_offset; *buf++ = PSB_2D_SRC_OFF_BH | (src_x << PSB_2D_SRCOFF_XSTART_SHIFT) | (src_y << PSB_2D_SRCOFF_YSTART_SHIFT); *buf++ = blit_cmd; *buf++ = (dst_x << PSB_2D_DST_XSTART_SHIFT) | (dst_y << PSB_2D_DST_YSTART_SHIFT); *buf++ = (size_x << PSB_2D_DST_XSIZE_SHIFT) | (size_y << PSB_2D_DST_YSIZE_SHIFT); *buf++ = PSB_2D_FLUSH_BH; return psbfb_2d_submit(dev_priv, buffer, buf - buffer); } /** * psbfb_copyarea_accel - copyarea acceleration for /dev/fb * @info: our framebuffer * @a: copyarea parameters from the framebuffer core * * Perform a 2D copy via the accelerator */ static void psbfb_copyarea_accel(struct fb_info *info, const struct fb_copyarea *a) { struct drm_fb_helper *fb_helper = info->par; struct drm_framebuffer *fb = fb_helper->fb; struct drm_device *dev = fb->dev; struct drm_psb_private *dev_priv = dev->dev_private; uint32_t offset; uint32_t stride; uint32_t src_format; uint32_t dst_format; if (!fb) return; offset = to_gtt_range(fb->obj[0])->offset; stride = fb->pitches[0]; switch (fb->format->depth) { case 8: src_format = PSB_2D_SRC_332RGB; dst_format = PSB_2D_DST_332RGB; break; case 15: src_format = PSB_2D_SRC_555RGB; dst_format = PSB_2D_DST_555RGB; break; case 16: src_format = PSB_2D_SRC_565RGB; dst_format = PSB_2D_DST_565RGB; break; case 24: case 32: /* this is wrong but since we don't do blending its okay */ src_format = PSB_2D_SRC_8888ARGB; dst_format = PSB_2D_DST_8888ARGB; break; default: /* software fallback */ drm_fb_helper_cfb_copyarea(info, a); return; } if (!gma_power_begin(dev, false)) { drm_fb_helper_cfb_copyarea(info, a); return; } psb_accel_2d_copy(dev_priv, offset, stride, src_format, offset, stride, dst_format, a->sx, a->sy, a->dx, a->dy, a->width, a->height); gma_power_end(dev); } /** * psbfb_copyarea - 2D copy interface * @info: our framebuffer * @region: region to copy * * Copy an area of the framebuffer console either by the accelerator * or directly using the cfb helpers according to the request */ void psbfb_copyarea(struct fb_info *info, const struct fb_copyarea *region) { if (unlikely(info->state != FBINFO_STATE_RUNNING)) return; /* Avoid the 8 pixel erratum */ if (region->width == 8 || region->height == 8 || (info->flags & FBINFO_HWACCEL_DISABLED)) return drm_fb_helper_cfb_copyarea(info, region); psbfb_copyarea_accel(info, region); } /** * psbfb_sync - synchronize 2D * @info: our framebuffer * * Wait for the 2D engine to quiesce so that we can do CPU * access to the framebuffer again */ int psbfb_sync(struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; struct drm_framebuffer *fb = fb_helper->fb; struct drm_device *dev = fb->dev; struct drm_psb_private *dev_priv = dev->dev_private; unsigned long _end = jiffies + HZ; int busy = 0; unsigned long flags; spin_lock_irqsave(&dev_priv->lock_2d, flags); /* * First idle the 2D engine. */ if ((PSB_RSGX32(PSB_CR_2D_SOCIF) == _PSB_C2_SOCIF_EMPTY) && ((PSB_RSGX32(PSB_CR_2D_BLIT_STATUS) & _PSB_C2B_STATUS_BUSY) == 0)) goto out; do { busy = (PSB_RSGX32(PSB_CR_2D_SOCIF) != _PSB_C2_SOCIF_EMPTY); cpu_relax(); } while (busy && !time_after_eq(jiffies, _end)); if (busy) busy = (PSB_RSGX32(PSB_CR_2D_SOCIF) != _PSB_C2_SOCIF_EMPTY); if (busy) goto out; do { busy = ((PSB_RSGX32(PSB_CR_2D_BLIT_STATUS) & _PSB_C2B_STATUS_BUSY) != 0); cpu_relax(); } while (busy && !time_after_eq(jiffies, _end)); if (busy) busy = ((PSB_RSGX32(PSB_CR_2D_BLIT_STATUS) & _PSB_C2B_STATUS_BUSY) != 0); out: spin_unlock_irqrestore(&dev_priv->lock_2d, flags); return (busy) ? -EBUSY : 0; }