/* * <:copyright-BRCM:2015:DUAL/GPL:standard * * Copyright (c) 2015 Broadcom * All Rights Reserved * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License, version 2, as published by * the Free Software Foundation (the "GPL"). * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * * A copy of the GPL is available at http://www.broadcom.com/licenses/GPLv2.php, or by * writing to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. * * :> */ /***************************************************************************** * * Copyright (c) 2013 Broadcom Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * Author: Peter Sulc * Tim Ross *****************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "fpm.h" #include "fpm_dev.h" #include "fpm_priv.h" #include "fpm_dt.h" #include "fpm_proc.h" #include "pmc_fpm.h" #ifndef CONFIG_BCM_FPM_DT #include "board.h" #include "bcm_map_part.h" #include "bcm_intr.h" #endif #define FPM_POOL_SIZE_FOR_512B_TOKEN SZ_32M #define FPM_POOL_SIZE_FOR_256B_TOKEN SZ_16M #ifdef CONFIG_BCM_JUMBO_FRAME #define FPM_POOL_SIZE_REQ FPM_POOL_SIZE_FOR_512B_TOKEN #else #define FPM_POOL_SIZE_REQ FPM_POOL_SIZE_FOR_256B_TOKEN #endif /* * Definitions & Clarifications * * The FPM hardware register definitions seem to overload the meaning of * "pool" to the point of complete confusion. "Pool" is used to refer to: * a) all of the memory allotted to the FPM hardware, b) a portion of that * memory used to allocate buffers of a particular size (256, 512, 1024, * 2048, 4096) even though buffers of a particular size may be located * anywhere within the FPM memory, and c) beginning with the 3390, the * portion of the memory allotted to the FPM that is within a particular * DDR bank, even though the memory may actually be in the same DDR bank. * In an attempt to eliminate this confusion I have deviated from the * hardware definitions of "pool" and use the following terms throughout * the code instead: * * pool: * A contiguous area of DDR from which the FPM hardware may allocate. * Chips prior to the 3390 had 1 pool, while the 3390 introduced 2 pools * which may be in the same or different DDR hardware interfaces. * * chunk: * The smallest allocation size available from the pool. Currently this * can be either 256 or 512 bytes. * * buffer: * Memory is allocated by the FPM as one or more contiguous chunks within * a given pool, hereafter called a buffer. Currently a buffer consists * of 2^n chunks where n = 0, 1, 2, or 3. With the introduction of multiple * pools the FPM hardware allows allocations to be made from a specific pool * or from any pool. If a pool is not specified then an internal algorithm * is used to pick the pool. * * token size: * Confusion also seems to arise when referring to the size field in the * token. While the size of a buffer is always a multiple of chunks, the * token size field may or may not be the full size of the buffer. When the * buffer is first allocated the token size field will equal the size of the * buffer (NOTE: There is a bug in all chips prior to the 3390B0 that results * in the size field of the token returned upon allocation to indicate the * size of the buffer as a multiple of 256 byte chunks regardless of whether * the FPM has been configured for a 256 or 512 byte chunk size). When * interfacing with hardware the token size field indicates the size of * the data in the buffer. * */ /* Global lock for all register accesses. */ spinlock_t fpm_reg_lock; struct fpmdev *fpm; u32 fpm_alloc_token(int size) { u32 token; pr_debug("-->\n"); token = __fpm_alloc_token(size); fpm_check_token(token); fpm_track_token_op(fpm_alloc_token, token, 0); pr_debug("%s(0x%08x)<-%pf\n", __func__, token, __builtin_return_address(0)); pr_debug("<--\n"); return token; } EXPORT_SYMBOL(fpm_alloc_token); u8 *fpm_alloc_buffer(int size) { u8 *buf = NULL; u32 token; pr_debug("-->\n"); token = __fpm_alloc_token(size); fpm_check_token(token); fpm_track_token_op(fpm_alloc_buffer, token, 0); pr_debug("%s(0x%08x)<-%pf\n", __func__, token, __builtin_return_address(0)); if (token) buf = __fpm_token_to_buffer(token); pr_debug("<--\n"); return buf; } EXPORT_SYMBOL(fpm_alloc_buffer); u32 fpm_alloc_token_pool(int pool, int size) { u32 token; token = __fpm_alloc_token_pool(pool, size); fpm_check_token(token); fpm_track_token_op(fpm_alloc_token_pool, token, 0); pr_debug("%s(0x%08x)<-%pf\n", __func__, token, __builtin_return_address(0)); return token; } EXPORT_SYMBOL(fpm_alloc_token_pool); u8 *fpm_alloc_buffer_pool(int pool, int size) { u8 *buf = NULL; u32 token; token = __fpm_alloc_token_pool(pool, size); fpm_check_token(token); fpm_track_token_op(fpm_alloc_buffer_pool, token, 0); pr_debug("%s(0x%08x)<-%pf\n", __func__, token, __builtin_return_address(0)); if (token) buf = __fpm_token_to_buffer(token); return buf; } EXPORT_SYMBOL(fpm_alloc_buffer_pool); u32 fpm_alloc_max_size_token_pool(int pool) { u32 token; token = __fpm_alloc_token_pool(pool, (fpm->chunk_size << 3)); fpm_check_token(token); fpm_track_token_op(fpm_alloc_max_size_token_pool, token, 0); pr_debug("%s(0x%08x)<-%pf\n", __func__, token, __builtin_return_address(0)); return token; } EXPORT_SYMBOL(fpm_alloc_max_size_token_pool); u32 fpm_incr_multicount(u32 token) { #ifdef CONFIG_BCM_FPM_TOKEN_HIST struct fpmdev *fdev = fpm; u32 tok_idx; #endif int incr = 0; u32 fpm_local_multi; pr_debug("-->\n"); fpm_check_token(token); fpm_track_token_op(fpm_incr_multicount, token, 0); pr_debug("%s(0x%08x)<-%pf\n", __func__, token, __builtin_return_address(0)); fpm_local_multi = (token & ~FPM_TOKEN_MULTIVAL_MASK); fpm_local_multi |= (1 << FPM_TOKEN_MULTIINCR_SHIFT); fpm_local_multi++; if (fpm_local_multi & FPM_TOKEN_VALID_MASK) { fpm_reg_write(FPM_POOL_MULTI, fpm_local_multi); incr = 1; } #ifdef CONFIG_BCM_FPM_TOKEN_HIST if (fdev->track_tokens) { tok_idx = FPM_TOKEN_INDEX(token); tok_idx |= (FPM_TOKEN_POOL(token) << (FPM_TOKEN_INDEX_SHIFT + 1)); #ifdef CONFIG_BCM_FPM_TOKEN_HIST_CHECKING if (!fdev->tok_ref_count[tok_idx]) { pr_err("Multicount increment of token (0x%08x)", token); pr_cont(" with zero ref count (%d).\n", fdev->tok_ref_count[tok_idx]); fdev->track_tokens = fdev->track_on_err; } #endif fdev->tok_ref_count[tok_idx] += incr; } #endif pr_debug("<--\n"); return incr; } EXPORT_SYMBOL(fpm_incr_multicount); void fpm_free_token(u32 token) { pr_debug("-->\n"); fpm_check_token(token); fpm_track_token_op(fpm_free_token, token, 0); pr_debug("%s(0x%08x)<-%pf\n", __func__, token, __builtin_return_address(0)); __fpm_free_token(token); pr_debug("<--\n"); } EXPORT_SYMBOL(fpm_free_token); void fpm_free_buffer(u8 *buf) { u32 token; pr_debug("-->\n"); token = __fpm_buffer_to_token(buf, 0); fpm_check_token(token); fpm_track_token_op(fpm_free_buffer, token, 0); pr_debug("%s(0x%08x)<-%pf\n", __func__, token, __builtin_return_address(0)); __fpm_free_token(token); pr_debug("<--\n"); } EXPORT_SYMBOL(fpm_free_buffer); u8 *fpm_token_to_buffer(u32 token) { pr_debug("-->\n"); fpm_check_token(token); fpm_track_token_op(fpm_token_to_buffer, token, 0); pr_debug("%s(0x%08x)<-%pf\n", __func__, token, __builtin_return_address(0)); pr_debug("<--\n"); return __fpm_token_to_buffer(token); } EXPORT_SYMBOL(fpm_token_to_buffer); u32 fpm_buffer_to_token(u8 *buf, u32 size) { u32 token; pr_debug("-->\n"); token = __fpm_buffer_to_token(buf, size); fpm_check_token(token); fpm_track_token_op(fpm_buffer_to_token, token, 0); pr_debug("%s(0x%08x)<-%pf\n", __func__, token, __builtin_return_address(0)); pr_debug("<--\n"); return token; } EXPORT_SYMBOL(fpm_buffer_to_token); u32 fpm_get_token_size(u32 token) { pr_debug("-->\n"); fpm_check_token(token); fpm_track_token_op(fpm_get_token_size, token, 0); pr_debug("%s(0x%08x)<-%pf\n", __func__, token, __builtin_return_address(0)); pr_debug("<--\n"); return __fpm_get_token_size(token); } EXPORT_SYMBOL(fpm_get_token_size); int fpm_set_token_size(u32 *token, u32 size) { int status = 0; pr_debug("-->\n"); if (!token) { pr_err("%s: NULL token ptr\n", __func__); dump_stack(); status = -EINVAL; goto done; } fpm_check_token(*token); fpm_track_token_op(fpm_set_token_size, *token, 0); *token &= ~FPM_TOKEN_SIZE_MASK; *token |= (size & FPM_TOKEN_SIZE_MASK); pr_debug("%s(0x%08x)<-%pf\n", __func__, *token, __builtin_return_address(0)); done: pr_debug("<--\n"); return status; } EXPORT_SYMBOL(fpm_set_token_size); bool fpm_is_valid_token(u32 token) { return (token & FPM_TOKEN_VALID_MASK); } EXPORT_SYMBOL(fpm_is_valid_token); /* this convert the token terminology from fpm to rdp */ u32 fpm_convert_fpm_token_to_rdp_token(u32 token) { return (FPM_TOKEN_INDEX(token) | (FPM_TOKEN_POOL(token) << FPM_TOKEN_INDEX_WIDTH)); } EXPORT_SYMBOL(fpm_convert_fpm_token_to_rdp_token); u32 fpm_convert_rdp_token_to_fpm_token(u32 token) { u32 pool = token >> FPM_TOKEN_INDEX_WIDTH; u32 fpm_token = (token << FPM_TOKEN_INDEX_SHIFT) & FPM_TOKEN_INDEX_MASK; fpm_token |= FPM_TOKEN_VALID_MASK | (pool << FPM_TOKEN_POOL_SHIFT); return fpm_token; } EXPORT_SYMBOL(fpm_convert_rdp_token_to_fpm_token); void fpm_sync_buffer_for_cpu(u32 token, u32 head, u32 tail, u32 flags) { u32 size; u8 *start; dma_addr_t paddr; pr_debug("-->\n"); fpm_check_token(token); fpm_track_token_op(fpm_sync_buffer_for_cpu, token, 0); pr_debug("%s(0x%08x)<-%pf\n", __func__, token, __builtin_return_address(0)); fpm_get_sync_start_size(token, head, tail, flags, &start, &size); /* TODO! this can probably be improved by using cache op defined * in nbuff.h */ paddr = fpm->pool_pbase[FPM_TOKEN_POOL(token)] + ((uintptr_t)start - (uintptr_t)fpm->pool_vbase[FPM_TOKEN_POOL(token)]); dma_sync_single_for_cpu(NULL, paddr, size, DMA_FROM_DEVICE); pr_debug("<--\n"); } EXPORT_SYMBOL(fpm_sync_buffer_for_cpu); void fpm_sync_buffer_for_device(u32 token, u32 head, u32 tail, u32 flags) { u32 size; u8 *start; dma_addr_t paddr; pr_debug("-->\n"); fpm_check_token(token); fpm_track_token_op(fpm_sync_buffer_for_device, token, 0); pr_debug("%s(0x%08x)<-%pf\n", __func__, token, __builtin_return_address(0)); fpm_get_sync_start_size(token, head, tail, flags, &start, &size); /* TODO! this can probably be improved by using cache op defined * in nbuff.h */ paddr = fpm->pool_pbase[FPM_TOKEN_POOL(token)] + ((uintptr_t)start - (uintptr_t)fpm->pool_vbase[FPM_TOKEN_POOL(token)]); dma_sync_single_for_device(NULL, paddr, size, DMA_TO_DEVICE); pr_debug("<--\n"); } EXPORT_SYMBOL(fpm_sync_buffer_for_device); void fpm_get_hw_info(struct fpm_hw_info *hw_info) { pr_debug("-->\n"); hw_info->pool_base[0] = (u32)fpm->pool_pbase[0]; #if FPM_POOL_NUM > 1 hw_info->pool_base[1] = (u32)fpm->pool_pbase[1]; #endif hw_info->alloc_dealloc[0] = (u32)FPM_ALLOC_8_CHUNKS_PHYS; hw_info->alloc_dealloc[1] = (u32)FPM_ALLOC_4_CHUNKS_PHYS; hw_info->alloc_dealloc[2] = (u32)FPM_ALLOC_2_CHUNKS_PHYS; hw_info->alloc_dealloc[3] = (u32)FPM_ALLOC_1_CHUNKS_PHYS; hw_info->chunk_size = fpm->chunk_size; hw_info->net_buf_head_pad = FPM_NET_BUF_HEAD_PAD; hw_info->net_buf_tail_pad = FPM_NET_BUF_TAIL_PAD; pr_debug("<--\n"); } EXPORT_SYMBOL(fpm_get_hw_info); int fpm_is_fpm_buf(void *buf) { int is_fpm = 1; pr_debug("-->\n"); if (fpm_buffer_to_pool(buf) < 0) is_fpm = 0; pr_debug("<--\n"); return is_fpm; } EXPORT_SYMBOL(fpm_is_fpm_buf); int fpm_get_pool_stats(int pool, struct fpm_pool_stats *stats) { pr_debug("-->\n"); stats->underflow_count = FPM_GET_UNDERFLOW(pool); stats->overflow_count = FPM_GET_UNDERFLOW(pool); stats->tok_avail = FPM_GET_TOK_AVAIL(pool); stats->alloc_fifo_empty = FPM_GET_ALLOC_FIFO_EMPTY(pool); stats->alloc_fifo_full = FPM_GET_ALLOC_FIFO_FULL(pool); stats->free_fifo_empty = FPM_GET_FREE_FIFO_EMPTY(pool); stats->free_fifo_full = FPM_GET_FREE_FIFO_FULL(pool); stats->pool_full = FPM_GET_POOL_FULL(pool); stats->invalid_tok_frees = FPM_GET_INVAL_TOK_FREES(pool); stats->invalid_tok_multi = FPM_GET_INVAL_TOK_MULTI(pool); stats->mem_corrupt_tok = FPM_GET_MEM_CORRUPT_TOK(pool); stats->mem_corrupt_tok_valid = FPM_GET_MEM_CORRUPT_TOK_VALID(pool) == 1; stats->invalid_free_tok = FPM_GET_INVALID_FREE_TOK(pool); stats->invalid_free_tok_valid = FPM_GET_INVALID_FREE_TOK_VALID(pool) == 1; stats->invalid_mcast_tok = FPM_GET_INVALID_MCAST_TOK(pool); stats->invalid_mcast_tok_valid = FPM_GET_INVALID_MCAST_TOK_VALID(pool) == 1; stats->tok_avail_low_wtmk = FPM_GET_TOK_AVAIL_LOW_WTMK(pool); pr_debug("<--\n"); return 0; } EXPORT_SYMBOL(fpm_get_pool_stats); void fpm_reset_bb(bool reset) { pr_debug("-->\n"); FPM_SET_BB_RESET(reset ? 1 : 0); pr_debug("<--\n"); } EXPORT_SYMBOL(fpm_reset_bb); void fpm_set_pool_sel_both(void) { #if FPM_POOL_NUM > 1 if (FPM_GET_POOL_INIT(1)) FPM_SET_BB_POOL_SEL(FPM_BB_POOL_SEL_POOL_BOTH); #endif } EXPORT_SYMBOL(fpm_set_pool_sel_both); #if STOP_UBUS_CAPTURE static void fpm_stop_ubus_capture(void) { int i; u32 *r; pr_err("Stopping UBUS capture\n"); for (i = 0, r = fpm->cap_vbase[0] + (0x408 >> 2); i < 8; i++, r += (0x100 >> 2)) { fpm_reg_write(r, 1 << 24); } for (i = 0, r = fpm->cap_vbase[1] + (0x408 >> 2); i < 12; i++, r += (0x100 >> 2)) { fpm_reg_write(r, 1 << 24); } } #endif static irqreturn_t fpm_isr(int irq, void *dev) { struct fpmdev *fdev = fpm; int pool; u32 status; pr_debug("IRQ -->\n"); for (pool = 0; pool < 2; pool++) { status = FPM_GET_IRQ_MASK(pool) & FPM_GET_IRQ_STATUS(pool); if (!status) continue; if (status & FPM_ALLOC_FIFO_FULL_MASK) { pr_err("FPM Pool %d: alloc fifo full\n", pool); fdev->track_tokens = fdev->track_on_err; } if (status & FPM_FREE_FIFO_FULL_MASK) { pr_err("FPM Pool %d: free fifo full\n", pool); fdev->track_tokens = fdev->track_on_err; } if (status & FPM_POOL_FULL_MASK) { pr_err("FPM Pool %d: pool full\n", pool); fdev->track_tokens = fdev->track_on_err; } if (status & FPM_FREE_TOKEN_NO_VALID_MASK) { if (FPM_GET_INVALID_FREE_TOK_VALID(pool)) { pr_err("FPM Pool %d: invalid token 0x%08x freed\n", pool, FPM_GET_INVALID_FREE_TOK(pool)); FPM_CLEAR_INVALID_FREE_TOK(pool); } else { pr_err("FPM Pool %d: invalid token freed\n", pool); } fdev->track_tokens = fdev->track_on_err; } if (status & FPM_FREE_TOKEN_INDEX_OUT_OF_RANGE_MASK) { if (FPM_GET_INVALID_FREE_TOK_VALID(pool)) { pr_err("FPM Pool %d: token 0x%08x ", pool, FPM_GET_INVALID_FREE_TOK(pool)); pr_err("freed with out of range index\n"); FPM_CLEAR_INVALID_FREE_TOK(pool); } else { pr_err("FPM Pool %d: token ", pool); pr_err("freed with out of range index\n"); } fdev->track_tokens = fdev->track_on_err; } if (status & FPM_MULTI_TOKEN_NO_VALID_MASK) { if (FPM_GET_INVALID_MCAST_TOK_VALID(pool)) { pr_err("FPM Pool %d: multicount update on ", pool); pr_err("invalid token %08x\n", FPM_GET_INVALID_MCAST_TOK(pool)); FPM_CLEAR_INVALID_MCAST_TOK(pool); } else { pr_err("FPM Pool %d: multicount update on ", pool); pr_err("invalid token\n"); } fdev->track_tokens = fdev->track_on_err; } if (status & FPM_MULTI_TOKEN_INDEX_OUT_OF_RANGE_MASK) { if (FPM_GET_INVALID_MCAST_TOK_VALID(pool)) { pr_err("FPM Pool %d: multicount update with ", pool); pr_err("out of range token index 0x%08x\n", FPM_GET_INVALID_MCAST_TOK(pool)); FPM_CLEAR_INVALID_MCAST_TOK(pool); } else { pr_err("FPM Pool %d: multicount update with ", pool); pr_err("out of range token index\n"); } fdev->track_tokens = fdev->track_on_err; } if (status & FPM_POOL_DIS_FREE_MULTI_MASK) { pr_err("FPM Pool %d: free or multicount ", pool); pr_err("update on disabled pool\n"); #if STOP_UBUS_CAPTURE fpm_stop_ubus_capture(); #endif fdev->track_tokens = fdev->track_on_err; } if (status & FPM_MEMORY_CORRUPT_MASK) { pr_err("FPM Pool %d: index memory corrupt\n", pool); fdev->track_tokens = fdev->track_on_err; } if (status & FPM_XOFF_MASK) pr_err("FPM Pool %d: XOFF state\n", pool); if (status & FPM_XON_MASK) pr_err("FPM Pool %d: XON state\n", pool); if (status & FPM_ILLEGAL_ADDRESS_ACCESS_MASK) { pr_err("FPM Pool %d: illegal address access attempt\n", pool); fdev->track_tokens = fdev->track_on_err; } if (status & FPM_ILLEGAL_ALLOC_REQUEST_MASK) { pr_err("FPM Pool %d: illegal alloc request\n", pool); fdev->track_tokens = fdev->track_on_err; } FPM_CLEAR_IRQ_STATUS(pool, status); } pr_debug("IRQ <--\n"); return IRQ_HANDLED; } #ifndef CONFIG_BCM_FPM_DT static int fpm_resource_alloc(struct platform_device *pdev) { struct fpmdev *fdev = pdev->dev.platform_data; void *pool0_vbase; unsigned int pool0_size; if (BcmMemReserveGetByName(BUFFER_MEMORY_BASE_ADDR_STR, &pool0_vbase, &pool0_size)) return -EFAULT; fdev->pool_vbase[0] = (u32 *)pool0_vbase; fdev->pool_pbase[0] = (phys_addr_t)virt_to_phys(pool0_vbase); fdev->pool_size[0] = pool0_size; fdev->reg_pbase = pdev->resource[0].start; fdev->reg_vbase = ioremap(pdev->resource[0].start, pdev->resource[0].end - pdev->resource[0].start + 1); if (fdev->reg_vbase == NULL) return -EFAULT; fdev->irq = pdev->resource[1].start; /* current the following values are hardcoded based on the default * 3390 device tree value */ fdev->init = 1; /* have FPM driver does the initialization */ fdev->track_tokens = 1; fdev->track_on_err = 0; fdev->pool_alloc_weight[0] = 1; fdev->pool_free_weight[0] = 1; #if FPM_POOL_NUM > 1 fdev->pool_alloc_weight[1] = 1; fdev->pool_free_weight[1] = 1; #endif return 0; } #endif /* TODO!! once we implement how to trim down the number of token per * fpm pool, then we update the following check */ static int fpm_pool_size_check_adjust(struct platform_device *pdev) { struct fpmdev *fdev = pdev->dev.platform_data; int remaining_size, pool_idx, pool_size; if (fdev->pool_size[0] < (FPM_POOL_SIZE_REQ * FPM_POOL_NUM)) { pr_err("FPM fails to initialize %d pool[s], because it requires " "%d MB, and system has only reserved %d MB.\n " "Initialization will fail!\n", FPM_POOL_NUM, (FPM_POOL_SIZE_REQ >> 20) * FPM_POOL_NUM, fdev->pool_size[0] >> 20); return -EFAULT; } if (fdev->pool_size[0] >= (FPM_POOL_SIZE_FOR_512B_TOKEN * FPM_POOL_NUM)) { pool_size = FPM_POOL_SIZE_FOR_512B_TOKEN; fdev->chunk_size = 512; } else { pool_size = FPM_POOL_SIZE_FOR_256B_TOKEN; fdev->chunk_size = 256; } remaining_size = fdev->pool_size[0] - (pool_size * FPM_POOL_NUM); fdev->pool_size[0] = pool_size; for (pool_idx = 1; pool_idx < FPM_POOL_NUM; pool_idx++) { fdev->pool_size[pool_idx] = pool_size; fdev->pool_vbase[pool_idx] = (u32 *)((uintptr_t)fdev->pool_vbase[0] + (pool_size * pool_idx)); fdev->pool_pbase[pool_idx] = (phys_addr_t)virt_to_phys( fdev->pool_vbase[pool_idx]); } pr_info("FPM will initialize %d pool[s] with token size set to %dB. This requires %dMB\n", FPM_POOL_NUM, fdev->chunk_size, (pool_size * FPM_POOL_NUM) >> 20); if (remaining_size != 0) pr_info("FPM: there are some unused/wasted memory: %d MB\n", remaining_size >> 20); return 0; } static int fpm_probe(struct platform_device *pdev) { int status = 0; struct fpmdev *fdev; u32 mask; u32 pool_pbase; /* TODO! double check whether 4908 need this workaround or not */ #if 0 int i; #endif #ifdef CONFIG_BCM_FPM_TOKEN_HIST u32 num_tokens; #endif pr_debug("-->\n"); if (fpm) { pr_err("%s Exceeded max FPM devices.\n", __func__); status = -EFAULT; goto done; } fdev = kmalloc(sizeof(struct fpmdev), GFP_KERNEL); if (!fdev) { status = -ENOMEM; goto done; } memset(fdev, 0, sizeof(struct fpmdev)); fpm = fdev; pdev->dev.platform_data = fdev; fdev->pdev = pdev; #ifdef CONFIG_BCM_FPM_DT status = fpm_parse_dt_node(pdev); #else status = fpm_resource_alloc(pdev); #endif if (status) goto err_free_fdev; status = fpm_pool_size_check_adjust(pdev); if (status) goto err_free_fdev; /* this shouldn't be the usual case, because RDP should've initialized it */ if (fdev->init && FPM_GET_POOL_BASE_ADDR(0) == 0) { /* * Put Broadbus into reset (if it exists on this chip). BB will * be taken out of reset by the Runner drivers once they have * finished initializing the BPM registers. */ fpm_reset_bb(true); /* * Init the pool(s) in the FPM. This creates the * TOKEN_INDEX values internally */ FPM_SET_POOL_INIT(0); #if FPM_POOL_NUM > 1 if (fdev->pool_pbase[1]) FPM_SET_POOL_INIT(1); #endif /* Wait for the pool(s) to init properly */ while (FPM_GET_POOL_INIT(0)) msleep(20); #if FPM_POOL_NUM > 1 if (fdev->pool_pbase[1]) while (FPM_GET_POOL_INIT(1)) msleep(20); #endif /* * Enable the FPM interrupt masks * TODO - we can look at this later when we decide who wants to * take/service interrupts from FPM. */ /* Activate the FPM pool(s). */ FPM_SET_POOL_ENABLE(0); #if FPM_POOL_NUM > 1 if (fdev->pool_pbase[1]) FPM_SET_POOL_ENABLE(1); #endif /* Set the chunk size to 512. */ if (fdev->chunk_size == 512) FPM_SET_CHUNK_SIZE(FPM_CHUNK_SIZE_512); else /* Set the chunk size to 256. */ FPM_SET_CHUNK_SIZE(FPM_CHUNK_SIZE_256); /* Store the pad values for everyone to use. */ FPM_SET_CTL_SPARE((FPM_NET_BUF_HEAD_PAD << 16) | FPM_NET_BUF_TAIL_PAD); /* Set the alloc & free weights. */ #if FPM_POOL_NUM > 1 if (fdev->pool_pbase[1]) { FPM_SET_ALLOC_WEIGHT(0, fdev->pool_alloc_weight[0]); FPM_SET_FREE_WEIGHT(0, fdev->pool_free_weight[0]); FPM_SET_ALLOC_WEIGHT(1, fdev->pool_alloc_weight[1]); FPM_SET_FREE_WEIGHT(1, fdev->pool_free_weight[1]); } #endif /* * Now that FPM has been initialized, set the pool base address * register(s) so that everyone else in the system (RG and CM * subsystems, IOP's, etc) are aware that they can start using * it. */ pool_pbase = fdev->pool_pbase[0]; FPM_SET_POOL_BASE_ADDR(0, pool_pbase); /* * Always write pool 1 even if it's not being used to make sure * it's 0. */ #if FPM_POOL_NUM > 1 pool_pbase = fdev->pool_pbase[1]; FPM_SET_POOL_BASE_ADDR(1, pool_pbase); #else pool_pbase = 0; FPM_SET_POOL_BASE_ADDR(1, pool_pbase); #endif if (fdev->irq > 0) { status = request_irq(fdev->irq, fpm_isr, IRQF_SHARED, "FPM", (void *)fdev); if (status) { pr_err("Failed registering IRQ with status "); pr_err("%d!\n", status); goto err_free_fdev; } FPM_CLEAR_IRQ_STATUS(0, 0xffffffff); FPM_CLEAR_IRQ_STATUS(1, 0xffffffff); mask = FPM_POOL_FULL_MASK | FPM_FREE_TOKEN_NO_VALID_MASK | /* FPM_FREE_TOKEN_INDEX_OUT_OF_RANGE_MASK | */ FPM_MULTI_TOKEN_NO_VALID_MASK | FPM_MULTI_TOKEN_INDEX_OUT_OF_RANGE_MASK | FPM_POOL_DIS_FREE_MULTI_MASK | FPM_MEMORY_CORRUPT_MASK | FPM_XON_MASK | FPM_XOFF_MASK | FPM_ILLEGAL_ADDRESS_ACCESS_MASK | FPM_ILLEGAL_ALLOC_REQUEST_MASK | FPM_EXPIRED_TOKEN_DET_MASK | FPM_EXPIRED_TOKEN_RECOV_MASK; FPM_SET_IRQ_MASK(0, mask); #if FPM_POOL_NUM > 1 if (fdev->pool_pbase[1]) FPM_SET_IRQ_MASK(1, mask); #endif #if STOP_UBUS_CAPTURE fdev->cap_vbase[0] = ioremap(fdev->cap_pbase[0], fdev->cap_size[0]); fdev->cap_vbase[1] = ioremap(fdev->cap_pbase[1], fdev->cap_size[1]); if (!fdev->cap_vbase[0]) { pr_err("%s Unable to ioremap UBUS ", __func__); pr_err("capture engines 0.\n"); status = -EFAULT; goto err_free_fdev; } if (!fdev->cap_vbase[1]) { pr_err("%s Unable to ioremap UBUS ", __func__); pr_err("capture engines 1.\n"); status = -EFAULT; goto err_free_fdev; } #endif } } fdev->pool_pbase[0] = FPM_GET_POOL_BASE_ADDR(0); #if FPM_POOL_NUM > 1 fdev->pool_pbase[1] = FPM_GET_POOL_BASE_ADDR(1); #endif #ifdef CREATE_VIRTUAL_ADDRESS_MAPPING /* This is not the current case for 4908 implementation, which * the board driver should've mapped the memory to uncached */ #if FPM_CACHED fdev->pool_vbase[0] = ioremap_cache(fdev->pool_pbase[0], fdev->pool_size[0]); #if FPM_POOL_NUM > 1 if (fdev->pool_pbase[1]) fdev->pool_vbase[1] = ioremap_cache(fdev->pool_pbase[1], fdev->pool_size[1]); else fdev->pool_vbase[1] = NULL; #endif #else fdev->pool_vbase[0] = ioremap(fdev->pool_pbase[0], fdev->pool_size[0]); #if FPM_POOL_NUM > 1 if (fdev->pool_pbase[1]) fdev->pool_vbase[1] = ioremap(fdev->pool_pbase[1], fdev->pool_size[1]); else fdev->pool_vbase[1] = NULL; #endif #endif if (!fdev->pool_vbase[0]) { pr_err("%s Unable to ioremap FPM pool 0 @ 0x%08x physical.\n", __func__, fdev->pool_pbase[0]); status = -EFAULT; goto err_free_fdev; } #if FPM_POOL_NUM > 1 if (fdev->pool_pbase[1] && !fdev->pool_vbase[1]) { pr_err("%s Unable to ioremap FPM pool 1 @ 0x%08x physical.\n", __func__, fdev->pool_pbase[1]); status = -EFAULT; goto err_free_fdev; } #endif #else fdev->pool_vbase[0] = phys_to_virt(fdev->pool_pbase[0]); #if FPM_POOL_NUM > 1 if (fdev->pool_pbase[1]) fdev->pool_vbase[1] = phys_to_virt(fdev->pool_pbase[1]); #endif #endif #if defined(FPM_TOKEN_CHUNKS) && !FPM_FORCE_NO_TOKEN_CHUNKS_BITS fdev->buf_sizes[0] = fdev->chunk_size << 3; fdev->buf_sizes[1] = fdev->chunk_size << 2; fdev->buf_sizes[2] = fdev->chunk_size << 1; fdev->buf_sizes[3] = fdev->chunk_size << 0; #endif fdev->buf_size_to_alloc_reg_map[0] = FPM_ALLOC_1_CHUNKS; /* 512 || 256 */ fdev->buf_size_to_alloc_reg_map[1] = FPM_ALLOC_2_CHUNKS; /* 1024 || 512 */ fdev->buf_size_to_alloc_reg_map[2] = FPM_ALLOC_4_CHUNKS; /* 2048 || 1024 */ fdev->buf_size_to_alloc_reg_map[3] = FPM_ALLOC_4_CHUNKS; /* 2048 || 1024 */ fdev->buf_size_to_alloc_reg_map[4] = FPM_ALLOC_8_CHUNKS; /* 4096 || 2048 */ fdev->buf_size_to_alloc_reg_map[5] = FPM_ALLOC_8_CHUNKS; /* 4096 || 2048 */ fdev->buf_size_to_alloc_reg_map[6] = FPM_ALLOC_8_CHUNKS; /* 4096 || 2048 */ fdev->buf_size_to_alloc_reg_map[7] = FPM_ALLOC_8_CHUNKS; /* 4096 || 2048 */ fdev->buf_size_to_alloc_reg_map_pool[0][0] = FPM_ALLOC_1_CHUNKS_FROM_POOL_0; fdev->buf_size_to_alloc_reg_map_pool[0][1] = FPM_ALLOC_2_CHUNKS_FROM_POOL_0; fdev->buf_size_to_alloc_reg_map_pool[0][2] = FPM_ALLOC_4_CHUNKS_FROM_POOL_0; fdev->buf_size_to_alloc_reg_map_pool[0][3] = FPM_ALLOC_4_CHUNKS_FROM_POOL_0; fdev->buf_size_to_alloc_reg_map_pool[0][4] = FPM_ALLOC_8_CHUNKS_FROM_POOL_0; fdev->buf_size_to_alloc_reg_map_pool[0][5] = FPM_ALLOC_8_CHUNKS_FROM_POOL_0; fdev->buf_size_to_alloc_reg_map_pool[0][6] = FPM_ALLOC_8_CHUNKS_FROM_POOL_0; fdev->buf_size_to_alloc_reg_map_pool[0][7] = FPM_ALLOC_8_CHUNKS_FROM_POOL_0; #if FPM_POOL_NUM > 1 fdev->buf_size_to_alloc_reg_map_pool[1][0] = FPM_ALLOC_1_CHUNKS_FROM_POOL_1; fdev->buf_size_to_alloc_reg_map_pool[1][1] = FPM_ALLOC_2_CHUNKS_FROM_POOL_1; fdev->buf_size_to_alloc_reg_map_pool[1][2] = FPM_ALLOC_4_CHUNKS_FROM_POOL_1; fdev->buf_size_to_alloc_reg_map_pool[1][3] = FPM_ALLOC_4_CHUNKS_FROM_POOL_1; fdev->buf_size_to_alloc_reg_map_pool[1][4] = FPM_ALLOC_8_CHUNKS_FROM_POOL_1; fdev->buf_size_to_alloc_reg_map_pool[1][5] = FPM_ALLOC_8_CHUNKS_FROM_POOL_1; fdev->buf_size_to_alloc_reg_map_pool[1][6] = FPM_ALLOC_8_CHUNKS_FROM_POOL_1; fdev->buf_size_to_alloc_reg_map_pool[1][7] = FPM_ALLOC_8_CHUNKS_FROM_POOL_1; #endif fdev->pool_alloc_weight[0] = FPM_GET_ALLOC_WEIGHT(0); fdev->pool_free_weight[0] = FPM_GET_FREE_WEIGHT(0); #if FPM_POOL_NUM > 1 fdev->pool_alloc_weight[1] = FPM_GET_ALLOC_WEIGHT(1); fdev->pool_free_weight[1] = FPM_GET_FREE_WEIGHT(1); #endif /* TODO! double check whether 4908 need this workaround or not */ #if 0 /* * If we are the one initializing the FPM block then we need to * allocate and never free 4 of the largest size tokens from each * pool in order to work around a bug in the FPM hardware of the 3383 * thru 3390A chips. */ if (fdev->init) { for (i = 0; i < 4; i++) { fdev->prealloc_tok[0][i] = FPM_ALLOC_8_CHUNKS_FROM_POOL(0); pr_debug("Pre-allocated token 0x%08x\n", fdev->prealloc_tok[0][i]); #if FPM_POOL_NUM > 1 if (fdev->pool_pbase[1]) { fdev->prealloc_tok[1][i] = FPM_ALLOC_8_CHUNKS_FROM_POOL(1); pr_debug("Pre-allocated token 0x%08x\n", fdev->prealloc_tok[1][i]); } #endif } } #endif #ifdef CONFIG_BCM_FPM_TOKEN_HIST num_tokens = FPM_TOKEN_INDEX_MASK >> FPM_TOKEN_INDEX_SHIFT; #if FPM_POOL_NUM > 1 if (fdev->pool_pbase[1]) num_tokens <<= 1; #endif fdev->tok_ref_count = kzalloc(num_tokens, GFP_KERNEL); if (!fdev->tok_ref_count) { pr_err("%s Unable to alloc token history array.\n", __func__); status = -ENOMEM; goto err_free_fdev; } pr_info("Allocating %d bytes (%d ops) for token history buffer.\n", FPM_HISTORY_MEM_SIZE, FPM_NUM_HISTORY_ENTRIES); fdev->tok_hist_start = kzalloc(FPM_NUM_HISTORY_ENTRIES * sizeof(struct fpm_tok_op), GFP_KERNEL); if (!fdev->tok_hist_start) { pr_err("%s Unable to alloc token history buffer.\n", __func__); status = -ENOMEM; goto err_free_hist; } fdev->tok_hist_end = fdev->tok_hist_start + FPM_NUM_HISTORY_ENTRIES; fdev->tok_hist_head = fdev->tok_hist_start; fdev->tok_hist_tail = fdev->tok_hist_start; spin_lock_init(&fdev->tok_hist_lock); fdev->track_on_err = false; #endif #if FPM_POOL_NUM > 1 pr_info("%s: FPM with %d pool(s)\n", MODULE_NAME, fdev->pool_pbase[1] ? 2 : 1); #endif goto done; #ifdef CONFIG_BCM_FPM_TOKEN_HIST err_free_hist: if (fdev->tok_ref_count) kfree(fdev->tok_ref_count); #endif err_free_fdev: fpm = NULL; kfree(fdev); done: pr_debug("<--\n"); return status; } static int fpm_remove(struct platform_device *pdev) { int status = 0; struct fpmdev *fdev = pdev->dev.platform_data; pr_debug("-->\n"); if (!fdev) { pr_err("%s Release called with uninitialized ", __func__); pr_err("platform_data.\n"); status = -EINVAL; goto done; } iounmap((void *)fdev->pool_vbase[0]); #if FPM_POOL_NUM > 1 if (fdev->pool_vbase[1]) iounmap((void *)fdev->pool_vbase[1]); #endif iounmap((void *)fdev->reg_vbase); #ifdef CONFIG_BCM_FPM_TOKEN_HIST if (fdev->tok_ref_count) kfree(fdev->tok_ref_count); if (fdev->tok_hist_start) kfree(fdev->tok_hist_start); #endif fpm = NULL; kfree(fdev); done: pr_debug("<--\n"); return status; } #ifdef CONFIG_BCM_FPM_DT static const struct of_device_id fpm_of_match[] = { {.compatible = "brcm,fpm"}, {} }; MODULE_DEVICE_TABLE(of, fpm_of_match); #else static struct resource fpm_resources[] = { [0] = { .start = FPM_PHYS_BASE, .end = FPM_PHYS_BASE + FPM_SIZE - 1, .flags = IORESOURCE_MEM, }, [1] = { .start = INTERRUPT_FPM_INTR, .end = INTERRUPT_FPM_INTR, .flags = IORESOURCE_IRQ, } }; static struct platform_device fpm_plat_dev = { .name = MODULE_NAME, .num_resources = ARRAY_SIZE(fpm_resources), .resource = fpm_resources, }; #endif static struct platform_driver fpm_driver = { .probe = fpm_probe, .remove = fpm_remove, .driver = { .name = MODULE_NAME, .owner = THIS_MODULE, #ifdef CONFIG_BCM_FPM_DT .of_match_table = fpm_of_match #endif } }; static int __init fpm_init(void) { int status = 0; pr_debug("%s driver v%s", MODULE_NAME, MODULE_VER); spin_lock_init(&fpm_reg_lock); status = platform_driver_register(&fpm_driver); if (status) goto done; pmc_fpm_power_up(); fpm_proc_init(); #ifndef CONFIG_BCM_FPM_DT /* since we are not using DeviceTree for FPM, we will just * register platform device here. */ fpm_plat_dev.resource[1].start = INTERRUPT_ID_FPM; fpm_plat_dev.resource[1].end = INTERRUPT_ID_FPM; status = platform_device_register(&fpm_plat_dev); if (status) { platform_device_unregister(&fpm_plat_dev); return status; } #endif done: return status; } static void __exit fpm_exit(void) { platform_driver_unregister(&fpm_driver); fpm_proc_exit(); pmc_fpm_power_down(); } module_init(fpm_init); module_exit(fpm_exit); MODULE_LICENSE("GPL v2");