Signed-off-by: Qiang Yu yuq825@gmail.com --- drivers/gpu/drm/lima/lima_l2_cache.c | 98 ++++++++++++++++++++++++++++ drivers/gpu/drm/lima/lima_l2_cache.h | 32 +++++++++ 2 files changed, 130 insertions(+) create mode 100644 drivers/gpu/drm/lima/lima_l2_cache.c create mode 100644 drivers/gpu/drm/lima/lima_l2_cache.h
diff --git a/drivers/gpu/drm/lima/lima_l2_cache.c b/drivers/gpu/drm/lima/lima_l2_cache.c new file mode 100644 index 000000000000..a9b85de5c51a --- /dev/null +++ b/drivers/gpu/drm/lima/lima_l2_cache.c @@ -0,0 +1,98 @@ +/* + * Copyright (C) 2017-2018 Lima Project + * + * 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 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 + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 <linux/io.h> +#include <linux/device.h> + +#include "lima_device.h" +#include "lima_l2_cache.h" +#include "lima_regs.h" + +#define l2_cache_write(reg, data) writel(data, ip->iomem + LIMA_L2_CACHE_##reg) +#define l2_cache_read(reg) readl(ip->iomem + LIMA_L2_CACHE_##reg) + +static int lima_l2_cache_wait_idle(struct lima_ip *ip) +{ + int timeout; + struct lima_device *dev = ip->dev; + + for (timeout = 100000; timeout > 0; timeout--) { + if (!(l2_cache_read(STATUS) & LIMA_L2_CACHE_STATUS_COMMAND_BUSY)) + break; + } + if (!timeout) { + dev_err(dev->dev, "l2 cache wait command timeout\n"); + return -ETIMEDOUT; + } + return 0; +} + +int lima_l2_cache_flush(struct lima_ip *ip) +{ + int ret; + + spin_lock(&ip->data.lock); + l2_cache_write(COMMAND, LIMA_L2_CACHE_COMMAND_CLEAR_ALL); + ret = lima_l2_cache_wait_idle(ip); + spin_unlock(&ip->data.lock); + return ret; +} + +int lima_l2_cache_init(struct lima_ip *ip) +{ + int i, err; + u32 size; + struct lima_device *dev = ip->dev; + + /* l2_cache2 only exists when one of PP4-7 present */ + if (ip->id == lima_ip_l2_cache2) { + for (i = lima_ip_pp4; i <= lima_ip_pp7; i++) { + if (dev->ip[i].present) + break; + } + if (i > lima_ip_pp7) + return -ENODEV; + } + + spin_lock_init(&ip->data.lock); + + size = l2_cache_read(SIZE); + dev_info(dev->dev, "l2 cache %uK, %u-way, %ubyte cache line, %ubit external bus\n", + 1 << (((size >> 16) & 0xff) - 10), + 1 << ((size >> 8) & 0xff), + 1 << (size & 0xff), + 1 << ((size >> 24) & 0xff)); + + err = lima_l2_cache_flush(ip); + if (err) + return err; + + l2_cache_write(ENABLE, LIMA_L2_CACHE_ENABLE_ACCESS | LIMA_L2_CACHE_ENABLE_READ_ALLOCATE); + l2_cache_write(MAX_READS, 0x1c); + + return 0; +} + +void lima_l2_cache_fini(struct lima_ip *ip) +{ + +} diff --git a/drivers/gpu/drm/lima/lima_l2_cache.h b/drivers/gpu/drm/lima/lima_l2_cache.h new file mode 100644 index 000000000000..4a35725bf38d --- /dev/null +++ b/drivers/gpu/drm/lima/lima_l2_cache.h @@ -0,0 +1,32 @@ +/* + * Copyright (C) 2017-2018 Lima Project + * + * 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 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 + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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. + */ +#ifndef __LIMA_L2_CACHE_H__ +#define __LIMA_L2_CACHE_H__ + +struct lima_ip; + +int lima_l2_cache_init(struct lima_ip *ip); +void lima_l2_cache_fini(struct lima_ip *ip); + +int lima_l2_cache_flush(struct lima_ip *ip); + +#endif