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qed: align DPI configuration to HW requirements

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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>
This commit is contained in:
Ram Amrani 2017-04-30 11:49:09 +03:00 committed by David S. Miller
parent e015d58b44
commit 107392b75f
2 changed files with 6 additions and 7 deletions
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1
drivers/net/ethernet/qlogic/qed/qed.h
View File

@ -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 */

12
drivers/net/ethernet/qlogic/qed/qed_dev.c
View File

@ -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;