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| author | Ram Amrani <Ram.Amrani@cavium.com> | 2017-04-30 11:49:09 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-01 11:42:15 -0400 |
| commit | 107392b75ffc96a2418d5382e52b08c598575e1b (patch) | |
| tree | db9a05ba2c8beaf5e7a8feb9d0f2b3e0d273a1b0 /drivers/net | |
| parent | e015d58b44a93a3fd89ed910d68659dfdc57237c (diff) | |
| download | linux-107392b75ffc96a2418d5382e52b08c598575e1b.tar.gz linux-107392b75ffc96a2418d5382e52b08c598575e1b.tar.bz2 linux-107392b75ffc96a2418d5382e52b08c598575e1b.zip | |
qed: align DPI configuration to HW requirements
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@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/qlogic/qed/qed.h | 1 | ||||
| -rw-r--r-- | 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 c07191cb7631..edf3b68bf935 100644 --- a/drivers/net/ethernet/qlogic/qed/qed.h +++ b/drivers/net/ethernet/qlogic/qed/qed.h @@ -72,6 +72,7 @@ extern const struct qed_common_ops qed_common_ops_pass; #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 aa1a4d5c864c..c478e079b039 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_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; |