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qed: Add doorbell overflow recovery mechanism

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Add the database used to register doorbelling entities, and APIs for adding
and deleting entries, and logic for traversing the database and doorbelling
once on behalf of all entities.

Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Tomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ariel Elior
2018-11-28 18:16:02 +02:00
committed by David S. Miller
parent dd354208dc
commit 36907cd5cd
4 changed files with 379 additions and 0 deletions
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14
include/linux/qed/qed_if.h
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@@ -47,6 +47,7 @@
#include <linux/slab.h>
#include <linux/qed/common_hsi.h>
#include <linux/qed/qed_chain.h>
#include <linux/io-64-nonatomic-lo-hi.h>
enum dcbx_protocol_type {
DCBX_PROTOCOL_ISCSI,
@@ -448,11 +449,24 @@ struct qed_mfw_tlv_iscsi {
bool tx_bytes_set;
};
enum qed_db_rec_width {
DB_REC_WIDTH_32B,
DB_REC_WIDTH_64B,
};
enum qed_db_rec_space {
DB_REC_KERNEL,
DB_REC_USER,
};
#define DIRECT_REG_WR(reg_addr, val) writel((u32)val, \
(void __iomem *)(reg_addr))
#define DIRECT_REG_RD(reg_addr) readl((void __iomem *)(reg_addr))
#define DIRECT_REG_WR64(reg_addr, val) writeq((u32)val, \
(void __iomem *)(reg_addr))
#define QED_COALESCE_MAX 0x1FF
#define QED_DEFAULT_RX_USECS 12
#define QED_DEFAULT_TX_USECS 48