// SPDX-License-Identifier: GPL-2.0 OR MIT /* Copyright 2017-2019 Qiang Yu <yuq825@gmail.com> */ #include <linux/iopoll.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 + reg) #define l2_cache_read(reg) readl(ip->iomem + reg) static int lima_l2_cache_wait_idle(struct lima_ip *ip) { struct lima_device *dev = ip->dev; int err; u32 v; err = readl_poll_timeout(ip->iomem + LIMA_L2_CACHE_STATUS, v, !(v & LIMA_L2_CACHE_STATUS_COMMAND_BUSY), 0, 1000); if (err) { dev_err(dev->dev, "l2 cache wait command timeout\n"); return err; } return 0; } int lima_l2_cache_flush(struct lima_ip *ip) { int ret; spin_lock(&ip->data.lock); l2_cache_write(LIMA_L2_CACHE_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(LIMA_L2_CACHE_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(LIMA_L2_CACHE_ENABLE, LIMA_L2_CACHE_ENABLE_ACCESS|LIMA_L2_CACHE_ENABLE_READ_ALLOCATE); l2_cache_write(LIMA_L2_CACHE_MAX_READS, 0x1c); return 0; } void lima_l2_cache_fini(struct lima_ip *ip) { }