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cxgb4/cxgb4vf: Update Ingress padding boundary values for T6 adapter 

Ingress padding boundary values got changed for T6.
    T5: 0=32B 1=64B 2=128B 3=256B 4=512B 5=1024B 6=2048B 7=4096B
    T6: 0=8B  1=16B 2=32B  3=64B  4=128B 5=128B  6=256B  7=512B

Updating the driver to set the correct boundary values in SGE_CONTROL to
32B.
Also, need to take care of this fl alignment change when calculating the
next packet offset.

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hariprasad Shenai 2015-12-23 22:47:13 +05:30 committed by David S. Miller
parent 44588560d9
commit acac596286
5 changed files with 76 additions and 34 deletions
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1
drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
View File

@ -1256,6 +1256,7 @@ int t4_phy_fw_ver(struct adapter *adap, int *phy_fw_ver);
int t4_fwcache(struct adapter *adap, enum fw_params_param_dev_fwcache op);
int t4_fw_upgrade(struct adapter *adap, unsigned int mbox,
const u8 *fw_data, unsigned int size, int force);
int t4_fl_pkt_align(struct adapter *adap);
unsigned int t4_flash_cfg_addr(struct adapter *adapter);
int t4_check_fw_version(struct adapter *adap);
int t4_get_fw_version(struct adapter *adapter, u32 *vers);

33
drivers/net/ethernet/chelsio/cxgb4/sge.c
View File

@ -3173,8 +3173,7 @@ static int t4_sge_init_soft(struct adapter *adap)
int t4_sge_init(struct adapter *adap)
{
struct sge *s = &adap->sge;
u32 sge_control, sge_control2, sge_conm_ctrl;
unsigned int ingpadboundary, ingpackboundary;
u32 sge_control, sge_conm_ctrl;
int ret, egress_threshold;
/*
@ -3185,35 +3184,7 @@ int t4_sge_init(struct adapter *adap)
s->pktshift = PKTSHIFT_G(sge_control);
s->stat_len = (sge_control & EGRSTATUSPAGESIZE_F) ? 128 : 64;
/* T4 uses a single control field to specify both the PCIe Padding and
* Packing Boundary. T5 introduced the ability to specify these
* separately. The actual Ingress Packet Data alignment boundary
* within Packed Buffer Mode is the maximum of these two
* specifications. (Note that it makes no real practical sense to
* have the Pading Boudary be larger than the Packing Boundary but you
* could set the chip up that way and, in fact, legacy T4 code would
* end doing this because it would initialize the Padding Boundary and
* leave the Packing Boundary initialized to 0 (16 bytes).)
*/
ingpadboundary = 1 << (INGPADBOUNDARY_G(sge_control) +
INGPADBOUNDARY_SHIFT_X);
if (is_t4(adap->params.chip)) {
s->fl_align = ingpadboundary;
} else {
/* T5 has a different interpretation of one of the PCIe Packing
* Boundary values.
*/
sge_control2 = t4_read_reg(adap, SGE_CONTROL2_A);
ingpackboundary = INGPACKBOUNDARY_G(sge_control2);
if (ingpackboundary == INGPACKBOUNDARY_16B_X)
ingpackboundary = 16;
else
ingpackboundary = 1 << (ingpackboundary +
INGPACKBOUNDARY_SHIFT_X);
s->fl_align = max(ingpadboundary, ingpackboundary);
}
s->fl_align = t4_fl_pkt_align(adap);
ret = t4_sge_init_soft(adap);
if (ret < 0)
return ret;

62
drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
View File

@ -6096,6 +6096,59 @@ int t4_fw_upgrade(struct adapter *adap, unsigned int mbox,
return t4_fw_restart(adap, mbox, reset);
}
/**
* t4_fl_pkt_align - return the fl packet alignment
* @adap: the adapter
*
* T4 has a single field to specify the packing and padding boundary.
* T5 onwards has separate fields for this and hence the alignment for
* next packet offset is maximum of these two.
*
*/
int t4_fl_pkt_align(struct adapter *adap)
{
u32 sge_control, sge_control2;
unsigned int ingpadboundary, ingpackboundary, fl_align, ingpad_shift;
sge_control = t4_read_reg(adap, SGE_CONTROL_A);
/* T4 uses a single control field to specify both the PCIe Padding and
* Packing Boundary. T5 introduced the ability to specify these
* separately. The actual Ingress Packet Data alignment boundary
* within Packed Buffer Mode is the maximum of these two
* specifications. (Note that it makes no real practical sense to
* have the Pading Boudary be larger than the Packing Boundary but you
* could set the chip up that way and, in fact, legacy T4 code would
* end doing this because it would initialize the Padding Boundary and
* leave the Packing Boundary initialized to 0 (16 bytes).)
* Padding Boundary values in T6 starts from 8B,
* where as it is 32B for T4 and T5.
*/
if (CHELSIO_CHIP_VERSION(adap->params.chip) <= CHELSIO_T5)
ingpad_shift = INGPADBOUNDARY_SHIFT_X;
else
ingpad_shift = T6_INGPADBOUNDARY_SHIFT_X;
ingpadboundary = 1 << (INGPADBOUNDARY_G(sge_control) + ingpad_shift);
fl_align = ingpadboundary;
if (!is_t4(adap->params.chip)) {
/* T5 has a weird interpretation of one of the PCIe Packing
* Boundary values. No idea why ...
*/
sge_control2 = t4_read_reg(adap, SGE_CONTROL2_A);
ingpackboundary = INGPACKBOUNDARY_G(sge_control2);
if (ingpackboundary == INGPACKBOUNDARY_16B_X)
ingpackboundary = 16;
else
ingpackboundary = 1 << (ingpackboundary +
INGPACKBOUNDARY_SHIFT_X);
fl_align = max(ingpadboundary, ingpackboundary);
}
return fl_align;
}
/**
* t4_fixup_host_params - fix up host-dependent parameters
* @adap: the adapter
@ -6114,6 +6167,7 @@ int t4_fixup_host_params(struct adapter *adap, unsigned int page_size,
unsigned int stat_len = cache_line_size > 64 ? 128 : 64;
unsigned int fl_align = cache_line_size < 32 ? 32 : cache_line_size;
unsigned int fl_align_log = fls(fl_align) - 1;
unsigned int ingpad;
t4_write_reg(adap, SGE_HOST_PAGE_SIZE_A,
HOSTPAGESIZEPF0_V(sge_hps) |
@ -6161,10 +6215,16 @@ int t4_fixup_host_params(struct adapter *adap, unsigned int page_size,
fl_align = 64;
fl_align_log = 6;
}
if (is_t5(adap->params.chip))
ingpad = INGPCIEBOUNDARY_32B_X;
else
ingpad = T6_INGPADBOUNDARY_32B_X;
t4_set_reg_field(adap, SGE_CONTROL_A,
INGPADBOUNDARY_V(INGPADBOUNDARY_M) |
EGRSTATUSPAGESIZE_F,
INGPADBOUNDARY_V(INGPCIEBOUNDARY_32B_X) |
INGPADBOUNDARY_V(ingpad) |
EGRSTATUSPAGESIZE_V(stat_len != 64));
t4_set_reg_field(adap, SGE_CONTROL2_A,
INGPACKBOUNDARY_V(INGPACKBOUNDARY_M),

3
drivers/net/ethernet/chelsio/cxgb4/t4_values.h
View File

@ -53,6 +53,9 @@
#define INGPADBOUNDARY_SHIFT_X 5
#define T6_INGPADBOUNDARY_SHIFT_X 3
#define T6_INGPADBOUNDARY_32B_X 2
/* CONTROL2 register */
#define INGPACKBOUNDARY_SHIFT_X 5
#define INGPACKBOUNDARY_16B_X 0

11
drivers/net/ethernet/chelsio/cxgb4vf/sge.c
View File

@ -2607,7 +2607,7 @@ int t4vf_sge_init(struct adapter *adapter)
u32 fl0 = sge_params->sge_fl_buffer_size[0];
u32 fl1 = sge_params->sge_fl_buffer_size[1];
struct sge *s = &adapter->sge;
unsigned int ingpadboundary, ingpackboundary;
unsigned int ingpadboundary, ingpackboundary, ingpad_shift;
/*
* Start by vetting the basic SGE parameters which have been set up by
@ -2642,9 +2642,16 @@ int t4vf_sge_init(struct adapter *adapter)
* could set the chip up that way and, in fact, legacy T4 code would
* end doing this because it would initialize the Padding Boundary and
* leave the Packing Boundary initialized to 0 (16 bytes).)
* Padding Boundary values in T6 starts from 8B,
* where as it is 32B for T4 and T5.
*/
if (CHELSIO_CHIP_VERSION(adapter->params.chip) <= CHELSIO_T5)
ingpad_shift = INGPADBOUNDARY_SHIFT_X;
else
ingpad_shift = T6_INGPADBOUNDARY_SHIFT_X;
ingpadboundary = 1 << (INGPADBOUNDARY_G(sge_params->sge_control) +
INGPADBOUNDARY_SHIFT_X);
ingpad_shift);
if (is_t4(adapter->params.chip)) {
s->fl_align = ingpadboundary;
} else {