From: Ram Amrani <ram.amr...@cavium.com>
When calculating doorbell BAR partitioning round up the number of
CPUs to the nearest power of 2 so the size of the DPI (per user
section) configured in the hardware will be stored properly and
not truncated.
Signed-off-by: Ram Amrani <ram.amr...@cavium.com>
Signed-off-by: Yuval Mintz <yuval.mi...@cavium.com>
---
drivers/net/ethernet/qlogic/qed/qed.h | 1 +
drivers/net/ethernet/qlogic/qed/qed_dev.c | 12 +++++-------
2 files changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/qlogic/qed/qed.h
b/drivers/net/ethernet/qlogic/qed/qed.h
index c07191c..edf3b68 100644
--- a/drivers/net/ethernet/qlogic/qed/qed.h
+++ b/drivers/net/ethernet/qlogic/qed/qed.h
@@ -72,6 +72,7 @@
#define QED_WFQ_UNIT 100
#define QED_WID_SIZE (1024)
+#define QED_MIN_WIDS (4)
#define QED_PF_DEMS_SIZE (4)
/* cau states */
diff --git a/drivers/net/ethernet/qlogic/qed/qed_dev.c
b/drivers/net/ethernet/qlogic/qed/qed_dev.c
index aa1a4d5..c478e07 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_dev.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_dev.c
@@ -1318,17 +1318,15 @@ static int qed_hw_init_common(struct qed_hwfn *p_hwfn,
qed_hw_init_dpi_size(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt, u32 pwm_region_size, u32 n_cpus)
{
- u32 dpi_page_size_1, dpi_page_size_2, dpi_page_size;
- u32 dpi_bit_shift, dpi_count;
+ u32 dpi_bit_shift, dpi_count, dpi_page_size;
u32 min_dpis;
+ u32 n_wids;
/* Calculate DPI size */
- dpi_page_size_1 = QED_WID_SIZE * n_cpus;
- dpi_page_size_2 = max_t(u32, QED_WID_SIZE, PAGE_SIZE);
- dpi_page_size = max_t(u32, dpi_page_size_1, dpi_page_size_2);
- dpi_page_size = roundup_pow_of_two(dpi_page_size);
+ n_wids = max_t(u32, QED_MIN_WIDS, n_cpus);
+ dpi_page_size = QED_WID_SIZE * roundup_pow_of_two(n_wids);
+ dpi_page_size = (dpi_page_size + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1);
dpi_bit_shift = ilog2(dpi_page_size / 4096);
-
dpi_count = pwm_region_size / dpi_page_size;
min_dpis = p_hwfn->pf_params.rdma_pf_params.min_dpis;
--
1.9.3
