Merge branch 'gianfar-fixes'
Jakub Kicinski says: ==================== gianfar: filer changes respinning with examples as requested. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
Коммит
e941ba8650
|
|
@ -900,27 +900,6 @@ static int gfar_check_filer_hardware(struct gfar_private *priv)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static int gfar_comp_asc(const void *a, const void *b)
|
||||
{
|
||||
return memcmp(a, b, 4);
|
||||
}
|
||||
|
||||
static int gfar_comp_desc(const void *a, const void *b)
|
||||
{
|
||||
return -memcmp(a, b, 4);
|
||||
}
|
||||
|
||||
static void gfar_swap(void *a, void *b, int size)
|
||||
{
|
||||
u32 *_a = a;
|
||||
u32 *_b = b;
|
||||
|
||||
swap(_a[0], _b[0]);
|
||||
swap(_a[1], _b[1]);
|
||||
swap(_a[2], _b[2]);
|
||||
swap(_a[3], _b[3]);
|
||||
}
|
||||
|
||||
/* Write a mask to filer cache */
|
||||
static void gfar_set_mask(u32 mask, struct filer_table *tab)
|
||||
{
|
||||
|
|
@ -1270,310 +1249,6 @@ static int gfar_convert_to_filer(struct ethtool_rx_flow_spec *rule,
|
|||
return 0;
|
||||
}
|
||||
|
||||
/* Copy size filer entries */
|
||||
static void gfar_copy_filer_entries(struct gfar_filer_entry dst[0],
|
||||
struct gfar_filer_entry src[0], s32 size)
|
||||
{
|
||||
while (size > 0) {
|
||||
size--;
|
||||
dst[size].ctrl = src[size].ctrl;
|
||||
dst[size].prop = src[size].prop;
|
||||
}
|
||||
}
|
||||
|
||||
/* Delete the contents of the filer-table between start and end
|
||||
* and collapse them
|
||||
*/
|
||||
static int gfar_trim_filer_entries(u32 begin, u32 end, struct filer_table *tab)
|
||||
{
|
||||
int length;
|
||||
|
||||
if (end > MAX_FILER_CACHE_IDX || end < begin)
|
||||
return -EINVAL;
|
||||
|
||||
end++;
|
||||
length = end - begin;
|
||||
|
||||
/* Copy */
|
||||
while (end < tab->index) {
|
||||
tab->fe[begin].ctrl = tab->fe[end].ctrl;
|
||||
tab->fe[begin++].prop = tab->fe[end++].prop;
|
||||
|
||||
}
|
||||
/* Fill up with don't cares */
|
||||
while (begin < tab->index) {
|
||||
tab->fe[begin].ctrl = 0x60;
|
||||
tab->fe[begin].prop = 0xFFFFFFFF;
|
||||
begin++;
|
||||
}
|
||||
|
||||
tab->index -= length;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Make space on the wanted location */
|
||||
static int gfar_expand_filer_entries(u32 begin, u32 length,
|
||||
struct filer_table *tab)
|
||||
{
|
||||
if (length == 0 || length + tab->index > MAX_FILER_CACHE_IDX ||
|
||||
begin > MAX_FILER_CACHE_IDX)
|
||||
return -EINVAL;
|
||||
|
||||
gfar_copy_filer_entries(&(tab->fe[begin + length]), &(tab->fe[begin]),
|
||||
tab->index - length + 1);
|
||||
|
||||
tab->index += length;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int gfar_get_next_cluster_start(int start, struct filer_table *tab)
|
||||
{
|
||||
for (; (start < tab->index) && (start < MAX_FILER_CACHE_IDX - 1);
|
||||
start++) {
|
||||
if ((tab->fe[start].ctrl & (RQFCR_AND | RQFCR_CLE)) ==
|
||||
(RQFCR_AND | RQFCR_CLE))
|
||||
return start;
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
static int gfar_get_next_cluster_end(int start, struct filer_table *tab)
|
||||
{
|
||||
for (; (start < tab->index) && (start < MAX_FILER_CACHE_IDX - 1);
|
||||
start++) {
|
||||
if ((tab->fe[start].ctrl & (RQFCR_AND | RQFCR_CLE)) ==
|
||||
(RQFCR_CLE))
|
||||
return start;
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Uses hardwares clustering option to reduce
|
||||
* the number of filer table entries
|
||||
*/
|
||||
static void gfar_cluster_filer(struct filer_table *tab)
|
||||
{
|
||||
s32 i = -1, j, iend, jend;
|
||||
|
||||
while ((i = gfar_get_next_cluster_start(++i, tab)) != -1) {
|
||||
j = i;
|
||||
while ((j = gfar_get_next_cluster_start(++j, tab)) != -1) {
|
||||
/* The cluster entries self and the previous one
|
||||
* (a mask) must be identical!
|
||||
*/
|
||||
if (tab->fe[i].ctrl != tab->fe[j].ctrl)
|
||||
break;
|
||||
if (tab->fe[i].prop != tab->fe[j].prop)
|
||||
break;
|
||||
if (tab->fe[i - 1].ctrl != tab->fe[j - 1].ctrl)
|
||||
break;
|
||||
if (tab->fe[i - 1].prop != tab->fe[j - 1].prop)
|
||||
break;
|
||||
iend = gfar_get_next_cluster_end(i, tab);
|
||||
jend = gfar_get_next_cluster_end(j, tab);
|
||||
if (jend == -1 || iend == -1)
|
||||
break;
|
||||
|
||||
/* First we make some free space, where our cluster
|
||||
* element should be. Then we copy it there and finally
|
||||
* delete in from its old location.
|
||||
*/
|
||||
if (gfar_expand_filer_entries(iend, (jend - j), tab) ==
|
||||
-EINVAL)
|
||||
break;
|
||||
|
||||
gfar_copy_filer_entries(&(tab->fe[iend + 1]),
|
||||
&(tab->fe[jend + 1]), jend - j);
|
||||
|
||||
if (gfar_trim_filer_entries(jend - 1,
|
||||
jend + (jend - j),
|
||||
tab) == -EINVAL)
|
||||
return;
|
||||
|
||||
/* Mask out cluster bit */
|
||||
tab->fe[iend].ctrl &= ~(RQFCR_CLE);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Swaps the masked bits of a1<>a2 and b1<>b2 */
|
||||
static void gfar_swap_bits(struct gfar_filer_entry *a1,
|
||||
struct gfar_filer_entry *a2,
|
||||
struct gfar_filer_entry *b1,
|
||||
struct gfar_filer_entry *b2, u32 mask)
|
||||
{
|
||||
u32 temp[4];
|
||||
temp[0] = a1->ctrl & mask;
|
||||
temp[1] = a2->ctrl & mask;
|
||||
temp[2] = b1->ctrl & mask;
|
||||
temp[3] = b2->ctrl & mask;
|
||||
|
||||
a1->ctrl &= ~mask;
|
||||
a2->ctrl &= ~mask;
|
||||
b1->ctrl &= ~mask;
|
||||
b2->ctrl &= ~mask;
|
||||
|
||||
a1->ctrl |= temp[1];
|
||||
a2->ctrl |= temp[0];
|
||||
b1->ctrl |= temp[3];
|
||||
b2->ctrl |= temp[2];
|
||||
}
|
||||
|
||||
/* Generate a list consisting of masks values with their start and
|
||||
* end of validity and block as indicator for parts belonging
|
||||
* together (glued by ANDs) in mask_table
|
||||
*/
|
||||
static u32 gfar_generate_mask_table(struct gfar_mask_entry *mask_table,
|
||||
struct filer_table *tab)
|
||||
{
|
||||
u32 i, and_index = 0, block_index = 1;
|
||||
|
||||
for (i = 0; i < tab->index; i++) {
|
||||
|
||||
/* LSByte of control = 0 sets a mask */
|
||||
if (!(tab->fe[i].ctrl & 0xF)) {
|
||||
mask_table[and_index].mask = tab->fe[i].prop;
|
||||
mask_table[and_index].start = i;
|
||||
mask_table[and_index].block = block_index;
|
||||
if (and_index >= 1)
|
||||
mask_table[and_index - 1].end = i - 1;
|
||||
and_index++;
|
||||
}
|
||||
/* cluster starts and ends will be separated because they should
|
||||
* hold their position
|
||||
*/
|
||||
if (tab->fe[i].ctrl & RQFCR_CLE)
|
||||
block_index++;
|
||||
/* A not set AND indicates the end of a depended block */
|
||||
if (!(tab->fe[i].ctrl & RQFCR_AND))
|
||||
block_index++;
|
||||
}
|
||||
|
||||
mask_table[and_index - 1].end = i - 1;
|
||||
|
||||
return and_index;
|
||||
}
|
||||
|
||||
/* Sorts the entries of mask_table by the values of the masks.
|
||||
* Important: The 0xFF80 flags of the first and last entry of a
|
||||
* block must hold their position (which queue, CLusterEnable, ReJEct,
|
||||
* AND)
|
||||
*/
|
||||
static void gfar_sort_mask_table(struct gfar_mask_entry *mask_table,
|
||||
struct filer_table *temp_table, u32 and_index)
|
||||
{
|
||||
/* Pointer to compare function (_asc or _desc) */
|
||||
int (*gfar_comp)(const void *, const void *);
|
||||
|
||||
u32 i, size = 0, start = 0, prev = 1;
|
||||
u32 old_first, old_last, new_first, new_last;
|
||||
|
||||
gfar_comp = &gfar_comp_desc;
|
||||
|
||||
for (i = 0; i < and_index; i++) {
|
||||
if (prev != mask_table[i].block) {
|
||||
old_first = mask_table[start].start + 1;
|
||||
old_last = mask_table[i - 1].end;
|
||||
sort(mask_table + start, size,
|
||||
sizeof(struct gfar_mask_entry),
|
||||
gfar_comp, &gfar_swap);
|
||||
|
||||
/* Toggle order for every block. This makes the
|
||||
* thing more efficient!
|
||||
*/
|
||||
if (gfar_comp == gfar_comp_desc)
|
||||
gfar_comp = &gfar_comp_asc;
|
||||
else
|
||||
gfar_comp = &gfar_comp_desc;
|
||||
|
||||
new_first = mask_table[start].start + 1;
|
||||
new_last = mask_table[i - 1].end;
|
||||
|
||||
gfar_swap_bits(&temp_table->fe[new_first],
|
||||
&temp_table->fe[old_first],
|
||||
&temp_table->fe[new_last],
|
||||
&temp_table->fe[old_last],
|
||||
RQFCR_QUEUE | RQFCR_CLE |
|
||||
RQFCR_RJE | RQFCR_AND);
|
||||
|
||||
start = i;
|
||||
size = 0;
|
||||
}
|
||||
size++;
|
||||
prev = mask_table[i].block;
|
||||
}
|
||||
}
|
||||
|
||||
/* Reduces the number of masks needed in the filer table to save entries
|
||||
* This is done by sorting the masks of a depended block. A depended block is
|
||||
* identified by gluing ANDs or CLE. The sorting order toggles after every
|
||||
* block. Of course entries in scope of a mask must change their location with
|
||||
* it.
|
||||
*/
|
||||
static int gfar_optimize_filer_masks(struct filer_table *tab)
|
||||
{
|
||||
struct filer_table *temp_table;
|
||||
struct gfar_mask_entry *mask_table;
|
||||
|
||||
u32 and_index = 0, previous_mask = 0, i = 0, j = 0, size = 0;
|
||||
s32 ret = 0;
|
||||
|
||||
/* We need a copy of the filer table because
|
||||
* we want to change its order
|
||||
*/
|
||||
temp_table = kmemdup(tab, sizeof(*temp_table), GFP_KERNEL);
|
||||
if (temp_table == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
mask_table = kcalloc(MAX_FILER_CACHE_IDX / 2 + 1,
|
||||
sizeof(struct gfar_mask_entry), GFP_KERNEL);
|
||||
|
||||
if (mask_table == NULL) {
|
||||
ret = -ENOMEM;
|
||||
goto end;
|
||||
}
|
||||
|
||||
and_index = gfar_generate_mask_table(mask_table, tab);
|
||||
|
||||
gfar_sort_mask_table(mask_table, temp_table, and_index);
|
||||
|
||||
/* Now we can copy the data from our duplicated filer table to
|
||||
* the real one in the order the mask table says
|
||||
*/
|
||||
for (i = 0; i < and_index; i++) {
|
||||
size = mask_table[i].end - mask_table[i].start + 1;
|
||||
gfar_copy_filer_entries(&(tab->fe[j]),
|
||||
&(temp_table->fe[mask_table[i].start]), size);
|
||||
j += size;
|
||||
}
|
||||
|
||||
/* And finally we just have to check for duplicated masks and drop the
|
||||
* second ones
|
||||
*/
|
||||
for (i = 0; i < tab->index && i < MAX_FILER_CACHE_IDX; i++) {
|
||||
if (tab->fe[i].ctrl == 0x80) {
|
||||
previous_mask = i++;
|
||||
break;
|
||||
}
|
||||
}
|
||||
for (; i < tab->index && i < MAX_FILER_CACHE_IDX; i++) {
|
||||
if (tab->fe[i].ctrl == 0x80) {
|
||||
if (tab->fe[i].prop == tab->fe[previous_mask].prop) {
|
||||
/* Two identical ones found!
|
||||
* So drop the second one!
|
||||
*/
|
||||
gfar_trim_filer_entries(i, i, tab);
|
||||
} else
|
||||
/* Not identical! */
|
||||
previous_mask = i;
|
||||
}
|
||||
}
|
||||
|
||||
kfree(mask_table);
|
||||
end: kfree(temp_table);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Write the bit-pattern from software's buffer to hardware registers */
|
||||
static int gfar_write_filer_table(struct gfar_private *priv,
|
||||
struct filer_table *tab)
|
||||
|
|
@ -1583,11 +1258,10 @@ static int gfar_write_filer_table(struct gfar_private *priv,
|
|||
return -EBUSY;
|
||||
|
||||
/* Fill regular entries */
|
||||
for (; i < MAX_FILER_IDX - 1 && (tab->fe[i].ctrl | tab->fe[i].prop);
|
||||
i++)
|
||||
for (; i < MAX_FILER_IDX && (tab->fe[i].ctrl | tab->fe[i].prop); i++)
|
||||
gfar_write_filer(priv, i, tab->fe[i].ctrl, tab->fe[i].prop);
|
||||
/* Fill the rest with fall-troughs */
|
||||
for (; i < MAX_FILER_IDX - 1; i++)
|
||||
for (; i < MAX_FILER_IDX; i++)
|
||||
gfar_write_filer(priv, i, 0x60, 0xFFFFFFFF);
|
||||
/* Last entry must be default accept
|
||||
* because that's what people expect
|
||||
|
|
@ -1621,7 +1295,6 @@ static int gfar_process_filer_changes(struct gfar_private *priv)
|
|||
{
|
||||
struct ethtool_flow_spec_container *j;
|
||||
struct filer_table *tab;
|
||||
s32 i = 0;
|
||||
s32 ret = 0;
|
||||
|
||||
/* So index is set to zero, too! */
|
||||
|
|
@ -1646,17 +1319,6 @@ static int gfar_process_filer_changes(struct gfar_private *priv)
|
|||
}
|
||||
}
|
||||
|
||||
i = tab->index;
|
||||
|
||||
/* Optimizations to save entries */
|
||||
gfar_cluster_filer(tab);
|
||||
gfar_optimize_filer_masks(tab);
|
||||
|
||||
pr_debug("\tSummary:\n"
|
||||
"\tData on hardware: %d\n"
|
||||
"\tCompression rate: %d%%\n",
|
||||
tab->index, 100 - (100 * tab->index) / i);
|
||||
|
||||
/* Write everything to hardware */
|
||||
ret = gfar_write_filer_table(priv, tab);
|
||||
if (ret == -EBUSY) {
|
||||
|
|
@ -1722,13 +1384,14 @@ static int gfar_add_cls(struct gfar_private *priv,
|
|||
}
|
||||
|
||||
process:
|
||||
priv->rx_list.count++;
|
||||
ret = gfar_process_filer_changes(priv);
|
||||
if (ret)
|
||||
goto clean_list;
|
||||
priv->rx_list.count++;
|
||||
return ret;
|
||||
|
||||
clean_list:
|
||||
priv->rx_list.count--;
|
||||
list_del(&temp->list);
|
||||
clean_mem:
|
||||
kfree(temp);
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче