qed: Handle possible race in SB config
Due to HW design, some of the memories are wide-bus and access to those needs to be sequentialized on a per-HW-block level; Read/write to a given HW-block might break other read/write to wide-bus memory done at ~same time. Status blocks initialization in CAU is done into such a wide-bus memory. This moves the initialization into using DMAE which is guaranteed to be safe to use on such memories. Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -473,20 +473,20 @@ void qed_int_cau_conf_sb(struct qed_hwfn *p_hwfn,
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u8 vf_valid)
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{
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struct cau_sb_entry sb_entry;
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u32 val;
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qed_init_cau_sb_entry(p_hwfn, &sb_entry, p_hwfn->rel_pf_id,
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vf_number, vf_valid);
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if (p_hwfn->hw_init_done) {
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val = CAU_REG_SB_ADDR_MEMORY + igu_sb_id * sizeof(u64);
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qed_wr(p_hwfn, p_ptt, val, lower_32_bits(sb_phys));
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qed_wr(p_hwfn, p_ptt, val + sizeof(u32),
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upper_32_bits(sb_phys));
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/* Wide-bus, initialize via DMAE */
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u64 phys_addr = (u64)sb_phys;
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val = CAU_REG_SB_VAR_MEMORY + igu_sb_id * sizeof(u64);
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qed_wr(p_hwfn, p_ptt, val, sb_entry.data);
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qed_wr(p_hwfn, p_ptt, val + sizeof(u32), sb_entry.params);
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qed_dmae_host2grc(p_hwfn, p_ptt, (u64)(uintptr_t)&phys_addr,
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CAU_REG_SB_ADDR_MEMORY +
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igu_sb_id * sizeof(u64), 2, 0);
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qed_dmae_host2grc(p_hwfn, p_ptt, (u64)(uintptr_t)&sb_entry,
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CAU_REG_SB_VAR_MEMORY +
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igu_sb_id * sizeof(u64), 2, 0);
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} else {
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/* Initialize Status Block Address */
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STORE_RT_REG_AGG(p_hwfn,
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