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qed: Provide auxiliary for getting free VF SB

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IOV code is very intrusive in its manipulation of the status block
database.
Add a new auxiliary function to allow the PF to find an available unused
status block to configure for a specific VF's MSI-x vector.

Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mintz, Yuval 2017-06-01 15:29:08 +03:00 committed by David S. Miller
parent 1ac72433c5
commit 09b6b14749
3 changed files with 49 additions and 27 deletions
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20
drivers/net/ethernet/qlogic/qed/qed_int.c
View File

@ -1412,6 +1412,26 @@ void qed_int_sb_setup(struct qed_hwfn *p_hwfn,
sb_info->igu_sb_id, 0, 0);
}
struct qed_igu_block *qed_get_igu_free_sb(struct qed_hwfn *p_hwfn, bool b_is_pf)
{
struct qed_igu_block *p_block;
u16 igu_id;
for (igu_id = 0; igu_id < QED_MAPPING_MEMORY_SIZE(p_hwfn->cdev);
igu_id++) {
p_block = &p_hwfn->hw_info.p_igu_info->entry[igu_id];
if (!(p_block->status & QED_IGU_STATUS_VALID) ||
!(p_block->status & QED_IGU_STATUS_FREE))
continue;
if (!!(p_block->status & QED_IGU_STATUS_PF) == b_is_pf)
return p_block;
}
return NULL;
}
static u16 qed_get_pf_igu_sb_id(struct qed_hwfn *p_hwfn, u16 vector_id)
{
struct qed_igu_block *p_block;

11
drivers/net/ethernet/qlogic/qed/qed_int.h
View File

@ -225,6 +225,17 @@ struct qed_igu_info {
};
/* TODO Names of function may change... */
/**
* @brief return a pointer to an unused valid SB
*
* @param p_hwfn
* @param b_is_pf - true iff we want a SB belonging to a PF
*
* @return point to an igu_block, NULL if none is available
*/
struct qed_igu_block *qed_get_igu_free_sb(struct qed_hwfn *p_hwfn,
bool b_is_pf);
void qed_int_igu_init_pure_rt(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt,
bool b_set,

45
drivers/net/ethernet/qlogic/qed/qed_sriov.c
View File

@ -868,12 +868,11 @@ static u8 qed_iov_alloc_vf_igu_sbs(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt,
struct qed_vf_info *vf, u16 num_rx_queues)
{
struct qed_igu_block *igu_blocks;
int qid = 0, igu_id = 0;
struct qed_igu_block *p_block;
struct cau_sb_entry sb_entry;
int qid = 0;
u32 val = 0;
igu_blocks = p_hwfn->hw_info.p_igu_info->entry;
if (num_rx_queues > p_hwfn->hw_info.p_igu_info->usage.free_cnt_iov)
num_rx_queues = p_hwfn->hw_info.p_igu_info->usage.free_cnt_iov;
p_hwfn->hw_info.p_igu_info->usage.free_cnt_iov -= num_rx_queues;
@ -882,31 +881,23 @@ static u8 qed_iov_alloc_vf_igu_sbs(struct qed_hwfn *p_hwfn,
SET_FIELD(val, IGU_MAPPING_LINE_VALID, 1);
SET_FIELD(val, IGU_MAPPING_LINE_PF_VALID, 0);
while ((qid < num_rx_queues) &&
(igu_id < QED_MAPPING_MEMORY_SIZE(p_hwfn->cdev))) {
if (igu_blocks[igu_id].status & QED_IGU_STATUS_FREE) {
struct cau_sb_entry sb_entry;
for (qid = 0; qid < num_rx_queues; qid++) {
p_block = qed_get_igu_free_sb(p_hwfn, false);
vf->igu_sbs[qid] = p_block->igu_sb_id;
p_block->status &= ~QED_IGU_STATUS_FREE;
SET_FIELD(val, IGU_MAPPING_LINE_VECTOR_NUMBER, qid);
vf->igu_sbs[qid] = (u16)igu_id;
igu_blocks[igu_id].status &= ~QED_IGU_STATUS_FREE;
qed_wr(p_hwfn, p_ptt,
IGU_REG_MAPPING_MEMORY +
sizeof(u32) * p_block->igu_sb_id, val);
SET_FIELD(val, IGU_MAPPING_LINE_VECTOR_NUMBER, qid);
qed_wr(p_hwfn, p_ptt,
IGU_REG_MAPPING_MEMORY + sizeof(u32) * igu_id,
val);
/* Configure igu sb in CAU which were marked valid */
qed_init_cau_sb_entry(p_hwfn, &sb_entry,
p_hwfn->rel_pf_id,
vf->abs_vf_id, 1);
qed_dmae_host2grc(p_hwfn, p_ptt,
(u64)(uintptr_t)&sb_entry,
CAU_REG_SB_VAR_MEMORY +
igu_id * sizeof(u64), 2, 0);
qid++;
}
igu_id++;
/* Configure igu sb in CAU which were marked valid */
qed_init_cau_sb_entry(p_hwfn, &sb_entry,
p_hwfn->rel_pf_id, vf->abs_vf_id, 1);
qed_dmae_host2grc(p_hwfn, p_ptt,
(u64)(uintptr_t)&sb_entry,
CAU_REG_SB_VAR_MEMORY +
p_block->igu_sb_id * sizeof(u64), 2, 0);
}
vf->num_sbs = (u8) num_rx_queues;