[PATCH net-next] cxgb4: Remove SGE_HOST_PAGE_SIZE dependency on page size

[PATCH net-next] cxgb4: Remove SGE_HOST_PAGE_SIZE dependency on page size

[Arjun Vynipadath]

The SGE Host Page Size has nothing to do with the actual
Host Page Size. It's the SGE's BAR2 Doorbell/GTS Page Size
for interpreting the SGE Ingress/Egress Queue per Page values.
Firmware reads all of these things and makes all the
subsequent changes necessary. The Host Driver uses the SGE
Host Page Size in order to properly calculate BAR2 Offsets.

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Arjun Vynipadath <arjun@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
---
 drivers/net/ethernet/chelsio/cxgb4/t4_hw.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
index cb52394..fc6a087 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
@@ -7141,21 +7141,10 @@ int t4_fixup_host_params(struct adapter *adap, unsigned int page_size,
 			 unsigned int cache_line_size)
 {
 	unsigned int page_shift = fls(page_size) - 1;
-	unsigned int sge_hps = page_shift - 10;
 	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;
 
-	t4_write_reg(adap, SGE_HOST_PAGE_SIZE_A,
-		     HOSTPAGESIZEPF0_V(sge_hps) |
-		     HOSTPAGESIZEPF1_V(sge_hps) |
-		     HOSTPAGESIZEPF2_V(sge_hps) |
-		     HOSTPAGESIZEPF3_V(sge_hps) |
-		     HOSTPAGESIZEPF4_V(sge_hps) |
-		     HOSTPAGESIZEPF5_V(sge_hps) |
-		     HOSTPAGESIZEPF6_V(sge_hps) |
-		     HOSTPAGESIZEPF7_V(sge_hps));
-
 	if (is_t4(adap->params.chip)) {
 		t4_set_reg_field(adap, SGE_CONTROL_A,
 				 INGPADBOUNDARY_V(INGPADBOUNDARY_M) |
-- 
2.9.5

Re: [PATCH net-next] cxgb4: Remove SGE_HOST_PAGE_SIZE dependency on page size

[David Miller]

From: Arjun Vynipadath <arjun@chelsio.com>
Date: Fri, 16 Nov 2018 09:15:42 +0530

> The SGE Host Page Size has nothing to do with the actual
> Host Page Size. It's the SGE's BAR2 Doorbell/GTS Page Size
> for interpreting the SGE Ingress/Egress Queue per Page values.
> Firmware reads all of these things and makes all the
> subsequent changes necessary. The Host Driver uses the SGE
> Host Page Size in order to properly calculate BAR2 Offsets.
> 
> Signed-off-by: Casey Leedom <leedom@chelsio.com>
> Signed-off-by: Arjun Vynipadath <arjun@chelsio.com>
> Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>

Applied.