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Date: Sun, 30 Apr 2017 11:49:09 +0300 From: Yuval Mintz <Yuval.Mintz@...ium.com> To: <davem@...emloft.net>, <netdev@...r.kernel.org> CC: <Ram.Amrani@...ium.com>, Yuval Mintz <Yuval.Mintz@...ium.com> Subject: [PATCH net-next 5/6] qed: align DPI configuration to HW requirements From: Ram Amrani <Ram.Amrani@...ium.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.Amrani@...ium.com> Signed-off-by: Yuval Mintz <Yuval.Mintz@...ium.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
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