From: Rahul Lakkireddy Date: Wed, 17 Jan 2018 07:23:47 +0000 (+0530) Subject: cxgb4: use zlib deflate to compress firmware dump X-Git-Tag: v4.19~1702^2~120^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=91c1953de38725d41cf9a677569a8cc280065064;p=platform%2Fkernel%2Flinux-rpi3.git cxgb4: use zlib deflate to compress firmware dump Use zlib deflate to compress firmware dump. Collect and compress as much firmware dump as possible into a 32 MB buffer. Signed-off-by: Rahul Lakkireddy Signed-off-by: Vishal Kulkarni Signed-off-by: Ganesh Goudar Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/chelsio/cxgb4/Makefile b/drivers/net/ethernet/chelsio/cxgb4/Makefile index 8c9c6b0..5df9237 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/Makefile +++ b/drivers/net/ethernet/chelsio/cxgb4/Makefile @@ -12,3 +12,4 @@ cxgb4-objs := cxgb4_main.o l2t.o smt.o t4_hw.o sge.o clip_tbl.o cxgb4_ethtool.o cxgb4-$(CONFIG_CHELSIO_T4_DCB) += cxgb4_dcb.o cxgb4-$(CONFIG_CHELSIO_T4_FCOE) += cxgb4_fcoe.o cxgb4-$(CONFIG_DEBUG_FS) += cxgb4_debugfs.o +cxgb4-$(CONFIG_ZLIB_DEFLATE) += cudbg_zlib.o diff --git a/drivers/net/ethernet/chelsio/cxgb4/cudbg_if.h b/drivers/net/ethernet/chelsio/cxgb4/cudbg_if.h index eb1d2f4..8568a51 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cudbg_if.h +++ b/drivers/net/ethernet/chelsio/cxgb4/cudbg_if.h @@ -90,6 +90,7 @@ struct cudbg_init { u8 compress_type; /* Type of compression to use */ void *compress_buff; /* Compression buffer */ u32 compress_buff_size; /* Compression buffer size */ + void *workspace; /* Workspace for zlib */ }; static inline unsigned int cudbg_mbytes_to_bytes(unsigned int size) diff --git a/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib_common.h b/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib_common.h index 2e1c8e8..8150ea8 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib_common.h +++ b/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib_common.h @@ -26,6 +26,7 @@ enum cudbg_dump_type { enum cudbg_compression_type { CUDBG_COMPRESSION_NONE = 1, + CUDBG_COMPRESSION_ZLIB, }; struct cudbg_hdr { diff --git a/drivers/net/ethernet/chelsio/cxgb4/cudbg_zlib.c b/drivers/net/ethernet/chelsio/cxgb4/cudbg_zlib.c new file mode 100644 index 0000000..4c3854c --- /dev/null +++ b/drivers/net/ethernet/chelsio/cxgb4/cudbg_zlib.c @@ -0,0 +1,81 @@ +/* + * Copyright (C) 2018 Chelsio Communications. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + * + */ + +#include + +#include "cxgb4.h" +#include "cudbg_if.h" +#include "cudbg_lib_common.h" +#include "cudbg_zlib.h" + +static int cudbg_get_compress_hdr(struct cudbg_buffer *pdbg_buff, + struct cudbg_buffer *pin_buff) +{ + if (pdbg_buff->offset + sizeof(struct cudbg_compress_hdr) > + pdbg_buff->size) + return CUDBG_STATUS_NO_MEM; + + pin_buff->data = (char *)pdbg_buff->data + pdbg_buff->offset; + pin_buff->offset = 0; + pin_buff->size = sizeof(struct cudbg_compress_hdr); + pdbg_buff->offset += sizeof(struct cudbg_compress_hdr); + return 0; +} + +int cudbg_compress_buff(struct cudbg_init *pdbg_init, + struct cudbg_buffer *pin_buff, + struct cudbg_buffer *pout_buff) +{ + struct z_stream_s compress_stream = { 0 }; + struct cudbg_buffer temp_buff = { 0 }; + struct cudbg_compress_hdr *c_hdr; + int rc; + + /* Write compression header to output buffer before compression */ + rc = cudbg_get_compress_hdr(pout_buff, &temp_buff); + if (rc) + return rc; + + c_hdr = (struct cudbg_compress_hdr *)temp_buff.data; + c_hdr->compress_id = CUDBG_ZLIB_COMPRESS_ID; + + compress_stream.workspace = pdbg_init->workspace; + rc = zlib_deflateInit2(&compress_stream, Z_DEFAULT_COMPRESSION, + Z_DEFLATED, CUDBG_ZLIB_WIN_BITS, + CUDBG_ZLIB_MEM_LVL, Z_DEFAULT_STRATEGY); + if (rc != Z_OK) + return CUDBG_SYSTEM_ERROR; + + compress_stream.next_in = pin_buff->data; + compress_stream.avail_in = pin_buff->size; + compress_stream.next_out = pout_buff->data + pout_buff->offset; + compress_stream.avail_out = pout_buff->size - pout_buff->offset; + + rc = zlib_deflate(&compress_stream, Z_FINISH); + if (rc != Z_STREAM_END) + return CUDBG_SYSTEM_ERROR; + + rc = zlib_deflateEnd(&compress_stream); + if (rc != Z_OK) + return CUDBG_SYSTEM_ERROR; + + c_hdr->compress_size = compress_stream.total_out; + c_hdr->decompress_size = pin_buff->size; + pout_buff->offset += compress_stream.total_out; + + return 0; +} diff --git a/drivers/net/ethernet/chelsio/cxgb4/cudbg_zlib.h b/drivers/net/ethernet/chelsio/cxgb4/cudbg_zlib.h index f4b4a4a2..9d55c4c 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cudbg_zlib.h +++ b/drivers/net/ethernet/chelsio/cxgb4/cudbg_zlib.h @@ -18,10 +18,39 @@ #ifndef __CUDBG_ZLIB_H__ #define __CUDBG_ZLIB_H__ +#include + +#define CUDBG_ZLIB_COMPRESS_ID 17 +#define CUDBG_ZLIB_WIN_BITS 12 +#define CUDBG_ZLIB_MEM_LVL 4 + +struct cudbg_compress_hdr { + u32 compress_id; + u64 decompress_size; + u64 compress_size; + u64 rsvd[32]; +}; + +static inline int cudbg_get_workspace_size(void) +{ +#ifdef CONFIG_ZLIB_DEFLATE + return zlib_deflate_workspacesize(CUDBG_ZLIB_WIN_BITS, + CUDBG_ZLIB_MEM_LVL); +#else + return 0; +#endif /* CONFIG_ZLIB_DEFLATE */ +} + +#ifndef CONFIG_ZLIB_DEFLATE static inline int cudbg_compress_buff(struct cudbg_init *pdbg_init, struct cudbg_buffer *pin_buff, struct cudbg_buffer *pout_buff) { return 0; } +#else +int cudbg_compress_buff(struct cudbg_init *pdbg_init, + struct cudbg_buffer *pin_buff, + struct cudbg_buffer *pout_buff); +#endif /* CONFIG_ZLIB_DEFLATE */ #endif /* __CUDBG_ZLIB_H__ */ diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c index bf1732d..9e0a8a8 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c @@ -18,6 +18,7 @@ #include "t4_regs.h" #include "cxgb4.h" #include "cxgb4_cudbg.h" +#include "cudbg_zlib.h" static const struct cxgb4_collect_entity cxgb4_collect_mem_dump[] = { { CUDBG_EDC0, cudbg_collect_edc0_meminfo }, @@ -318,6 +319,7 @@ u32 cxgb4_get_dump_length(struct adapter *adap, u32 flag) { u32 i, entity; u32 len = 0; + u32 wsize; if (flag & CXGB4_ETH_DUMP_HW) { for (i = 0; i < ARRAY_SIZE(cxgb4_collect_hw_dump); i++) { @@ -333,6 +335,11 @@ u32 cxgb4_get_dump_length(struct adapter *adap, u32 flag) } } + /* If compression is enabled, a smaller destination buffer is enough */ + wsize = cudbg_get_workspace_size(); + if (wsize && len > CUDBG_DUMP_BUFF_SIZE) + len = CUDBG_DUMP_BUFF_SIZE; + return len; } @@ -374,6 +381,28 @@ static void cxgb4_cudbg_collect_entity(struct cudbg_init *pdbg_init, *tot_size += total_size; } +static int cudbg_alloc_compress_buff(struct cudbg_init *pdbg_init) +{ + u32 workspace_size; + + workspace_size = cudbg_get_workspace_size(); + pdbg_init->compress_buff = vzalloc(CUDBG_COMPRESS_BUFF_SIZE + + workspace_size); + if (!pdbg_init->compress_buff) + return -ENOMEM; + + pdbg_init->compress_buff_size = CUDBG_COMPRESS_BUFF_SIZE; + pdbg_init->workspace = (u8 *)pdbg_init->compress_buff + + CUDBG_COMPRESS_BUFF_SIZE - workspace_size; + return 0; +} + +static void cudbg_free_compress_buff(struct cudbg_init *pdbg_init) +{ + if (pdbg_init->compress_buff) + vfree(pdbg_init->compress_buff); +} + int cxgb4_cudbg_collect(struct adapter *adap, void *buf, u32 *buf_size, u32 flag) { @@ -381,6 +410,7 @@ int cxgb4_cudbg_collect(struct adapter *adap, void *buf, u32 *buf_size, struct cudbg_buffer dbg_buff = { 0 }; u32 size, min_size, total_size = 0; struct cudbg_hdr *cudbg_hdr; + int rc; size = *buf_size; @@ -400,8 +430,6 @@ int cxgb4_cudbg_collect(struct adapter *adap, void *buf, u32 *buf_size, cudbg_hdr->max_entities = CUDBG_MAX_ENTITY; cudbg_hdr->chip_ver = adap->params.chip; cudbg_hdr->dump_type = CUDBG_DUMP_TYPE_MINI; - cudbg_init.compress_type = CUDBG_COMPRESSION_NONE; - cudbg_hdr->compress_type = cudbg_init.compress_type; min_size = sizeof(struct cudbg_hdr) + sizeof(struct cudbg_entity_hdr) * @@ -409,6 +437,24 @@ int cxgb4_cudbg_collect(struct adapter *adap, void *buf, u32 *buf_size, if (size < min_size) return -ENOMEM; + rc = cudbg_get_workspace_size(); + if (rc) { + /* Zlib available. So, use zlib deflate */ + cudbg_init.compress_type = CUDBG_COMPRESSION_ZLIB; + rc = cudbg_alloc_compress_buff(&cudbg_init); + if (rc) { + /* Ignore error and continue without compression. */ + dev_warn(adap->pdev_dev, + "Fail allocating compression buffer ret: %d. Continuing without compression.\n", + rc); + cudbg_init.compress_type = CUDBG_COMPRESSION_NONE; + rc = 0; + } + } else { + cudbg_init.compress_type = CUDBG_COMPRESSION_NONE; + } + + cudbg_hdr->compress_type = cudbg_init.compress_type; dbg_buff.offset += min_size; total_size = dbg_buff.offset; @@ -426,8 +472,12 @@ int cxgb4_cudbg_collect(struct adapter *adap, void *buf, u32 *buf_size, buf, &total_size); + cudbg_free_compress_buff(&cudbg_init); cudbg_hdr->data_len = total_size; - *buf_size = total_size; + if (cudbg_init.compress_type != CUDBG_COMPRESSION_NONE) + *buf_size = size; + else + *buf_size = total_size; return 0; } diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.h index 7ceeb0b..ce1ac9a 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.h +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.h @@ -23,6 +23,9 @@ #include "cudbg_entity.h" #include "cudbg_lib.h" +#define CUDBG_DUMP_BUFF_SIZE (32 * 1024 * 1024) /* 32 MB */ +#define CUDBG_COMPRESS_BUFF_SIZE (4 * 1024 * 1024) /* 4 MB */ + typedef int (*cudbg_collect_callback_t)(struct cudbg_init *pdbg_init, struct cudbg_buffer *dbg_buff, struct cudbg_error *cudbg_err);