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[ZLIB]: Move bnx2 driver gzip unpacker into zlib.

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Acked-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Denys Vlasenko 2007-09-30 17:56:49 -07:00 committed by David S. Miller
parent b3448b0bde
commit 8336793baf
5 changed files with 69 additions and 59 deletions
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48
drivers/net/bnx2.c
View File

@ -2761,48 +2761,6 @@ bnx2_set_rx_mode(struct net_device *dev)
spin_unlock_bh(&bp->phy_lock);
}
/* To be moved to generic lib/ */
static int
bnx2_gunzip(void *gunzip_buf, unsigned sz, u8 *zbuf, int len)
{
struct z_stream_s *strm;
int rc;
/* gzip header (1f,8b,08... 10 bytes total + possible asciz filename)
* is stripped */
rc = -ENOMEM;
strm = kmalloc(sizeof(*strm), GFP_KERNEL);
if (strm == NULL)
goto gunzip_nomem2;
strm->workspace = kmalloc(zlib_inflate_workspacesize(), GFP_KERNEL);
if (strm->workspace == NULL)
goto gunzip_nomem3;
strm->next_in = zbuf;
strm->avail_in = len;
strm->next_out = gunzip_buf;
strm->avail_out = sz;
rc = zlib_inflateInit2(strm, -MAX_WBITS);
if (rc == Z_OK) {
rc = zlib_inflate(strm, Z_FINISH);
/* after Z_FINISH, only Z_STREAM_END is "we unpacked it all" */
if (rc == Z_STREAM_END)
rc = sz - strm->avail_out;
else
rc = -EINVAL;
zlib_inflateEnd(strm);
} else
rc = -EINVAL;
kfree(strm->workspace);
gunzip_nomem3:
kfree(strm);
gunzip_nomem2:
return rc;
}
static void
load_rv2p_fw(struct bnx2 *bp, u32 *rv2p_code, u32 rv2p_code_len,
u32 rv2p_proc)
@ -2858,7 +2816,7 @@ load_cpu_fw(struct bnx2 *bp, struct cpu_reg *cpu_reg, struct fw_info *fw)
text = vmalloc(FW_BUF_SIZE);
if (!text)
return -ENOMEM;
rc = bnx2_gunzip(text, FW_BUF_SIZE, fw->gz_text, fw->gz_text_len);
rc = zlib_inflate_blob(text, FW_BUF_SIZE, fw->gz_text, fw->gz_text_len);
if (rc < 0) {
vfree(text);
return rc;
@ -2935,14 +2893,14 @@ bnx2_init_cpus(struct bnx2 *bp)
text = vmalloc(FW_BUF_SIZE);
if (!text)
return -ENOMEM;
rc = bnx2_gunzip(text, FW_BUF_SIZE, bnx2_rv2p_proc1, sizeof(bnx2_rv2p_proc1));
rc = zlib_inflate_blob(text, FW_BUF_SIZE, bnx2_rv2p_proc1, sizeof(bnx2_rv2p_proc1));
if (rc < 0) {
vfree(text);
goto init_cpu_err;
}
load_rv2p_fw(bp, text, rc /* == len */, RV2P_PROC1);
rc = bnx2_gunzip(text, FW_BUF_SIZE, bnx2_rv2p_proc2, sizeof(bnx2_rv2p_proc2));
rc = zlib_inflate_blob(text, FW_BUF_SIZE, bnx2_rv2p_proc2, sizeof(bnx2_rv2p_proc2));
if (rc < 0) {
vfree(text);
goto init_cpu_err;

6
include/linux/zlib.h
View File

@ -82,7 +82,7 @@
struct internal_state;
typedef struct z_stream_s {
Byte *next_in; /* next input byte */
const Byte *next_in; /* next input byte */
uInt avail_in; /* number of bytes available at next_in */
uLong total_in; /* total nb of input bytes read so far */
@ -699,4 +699,8 @@ extern int zlib_inflateInit2(z_streamp strm, int windowBits);
struct internal_state {int dummy;}; /* hack for buggy compilers */
#endif
/* Utility function: initialize zlib, unpack binary blob, clean up zlib,
* return len or negative error code. */
extern int zlib_inflate_blob(void *dst, unsigned dst_sz, const void *src, unsigned src_sz);
#endif /* _ZLIB_H */

18
lib/zlib_inflate/inffast.c
View File

@ -69,22 +69,22 @@
void inflate_fast(z_streamp strm, unsigned start)
{
struct inflate_state *state;
unsigned char *in; /* local strm->next_in */
unsigned char *last; /* while in < last, enough input available */
unsigned char *out; /* local strm->next_out */
unsigned char *beg; /* inflate()'s initial strm->next_out */
unsigned char *end; /* while out < end, enough space available */
const unsigned char *in; /* local strm->next_in */
const unsigned char *last; /* while in < last, enough input available */
unsigned char *out; /* local strm->next_out */
unsigned char *beg; /* inflate()'s initial strm->next_out */
unsigned char *end; /* while out < end, enough space available */
#ifdef INFLATE_STRICT
unsigned dmax; /* maximum distance from zlib header */
#endif
unsigned wsize; /* window size or zero if not using window */
unsigned whave; /* valid bytes in the window */
unsigned write; /* window write index */
unsigned char *window; /* allocated sliding window, if wsize != 0 */
unsigned char *window; /* allocated sliding window, if wsize != 0 */
unsigned long hold; /* local strm->hold */
unsigned bits; /* local strm->bits */
code const *lcode; /* local strm->lencode */
code const *dcode; /* local strm->distcode */
code const *lcode; /* local strm->lencode */
code const *dcode; /* local strm->distcode */
unsigned lmask; /* mask for first level of length codes */
unsigned dmask; /* mask for first level of distance codes */
code this; /* retrieved table entry */
@ -92,7 +92,7 @@ void inflate_fast(z_streamp strm, unsigned start)
/* window position, window bytes to copy */
unsigned len; /* match length, unused bytes */
unsigned dist; /* match distance */
unsigned char *from; /* where to copy match from */
unsigned char *from; /* where to copy match from */
/* copy state to local variables */
state = (struct inflate_state *)strm->state;

55
lib/zlib_inflate/inflate.c
View File

@ -332,14 +332,14 @@ static int zlib_inflateSyncPacket(z_streamp strm)
int zlib_inflate(z_streamp strm, int flush)
{
struct inflate_state *state;
unsigned char *next; /* next input */
unsigned char *put; /* next output */
const unsigned char *next; /* next input */
unsigned char *put; /* next output */
unsigned have, left; /* available input and output */
unsigned long hold; /* bit buffer */
unsigned bits; /* bits in bit buffer */
unsigned in, out; /* save starting available input and output */
unsigned copy; /* number of stored or match bytes to copy */
unsigned char *from; /* where to copy match bytes from */
unsigned char *from; /* where to copy match bytes from */
code this; /* current decoding table entry */
code last; /* parent table entry */
unsigned len; /* length to copy for repeats, bits to drop */
@ -897,7 +897,7 @@ int zlib_inflateIncomp(z_stream *z)
/* Setup some variables to allow misuse of updateWindow */
z->avail_out = 0;
z->next_out = z->next_in + z->avail_in;
z->next_out = (unsigned char*)z->next_in + z->avail_in;
zlib_updatewindow(z, z->avail_in);
@ -916,3 +916,50 @@ int zlib_inflateIncomp(z_stream *z)
return Z_OK;
}
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
/* Utility function: initialize zlib, unpack binary blob, clean up zlib,
* return len or negative error code. */
int zlib_inflate_blob(void *gunzip_buf, unsigned sz, const void *buf, unsigned len)
{
const u8 *zbuf = buf;
struct z_stream_s *strm;
int rc;
rc = -ENOMEM;
strm = kmalloc(sizeof(*strm), GFP_KERNEL);
if (strm == NULL)
goto gunzip_nomem1;
strm->workspace = kmalloc(zlib_inflate_workspacesize(), GFP_KERNEL);
if (strm->workspace == NULL)
goto gunzip_nomem2;
/* gzip header (1f,8b,08... 10 bytes total + possible asciz filename)
* expected to be stripped from input */
strm->next_in = zbuf;
strm->avail_in = len;
strm->next_out = gunzip_buf;
strm->avail_out = sz;
rc = zlib_inflateInit2(strm, -MAX_WBITS);
if (rc == Z_OK) {
rc = zlib_inflate(strm, Z_FINISH);
/* after Z_FINISH, only Z_STREAM_END is "we unpacked it all" */
if (rc == Z_STREAM_END)
rc = sz - strm->avail_out;
else
rc = -EINVAL;
zlib_inflateEnd(strm);
} else
rc = -EINVAL;
kfree(strm->workspace);
gunzip_nomem2:
kfree(strm);
gunzip_nomem1:
return rc; /* returns Z_OK (0) if successful */
}

1
lib/zlib_inflate/inflate_syms.c
View File

@ -16,4 +16,5 @@ EXPORT_SYMBOL(zlib_inflateInit2);
EXPORT_SYMBOL(zlib_inflateEnd);
EXPORT_SYMBOL(zlib_inflateReset);
EXPORT_SYMBOL(zlib_inflateIncomp);
EXPORT_SYMBOL(zlib_inflate_blob);
MODULE_LICENSE("GPL");