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net/mlx4_core: Fix quota handling in the QUERY_FUNC_CAP wrapper

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In current kernels, the mlx4 driver running on a VM does not
differentiate between max resource numbers for the HCA and
max quotas -- it simply takes the quota values passed to it
as max-resource values.

However, the driver actually requires the VFs to be aware of
the actual number of resources that the HCA was initialized with,
for QPs, CQs, SRQs and MPTs.

For QPs, CQs and SRQs, the reason is that in completion handling
the driver must know which of the 24 bits are the actual resource
number, and which are "padding" bits.

For MPTs, also, the driver assumes knowledge of the number of MPTs
in the system.

The previous commit fixes the quota logic on the VM for the quota values
passed to it by QUERY_FUNC_CAPS.

For QPs, CQs, SRQs, and MPTs, it takes the max resource numbers
from QUERY_HCA (and not QUERY_FUNC_CAPS).  The quotas passed
in QUERY_FUNC_CAPS are used to report max resource number values
in the response to ib_query_device.

However, the Hypervisor driver must consider that VMs
may be running previous kernels, and compatibility must be preserved.

To resolve the incompatibility with previous kernels running on VMs,
we deprecated the quota fields in mlx4_QUERY_FUNC_CAP.  In the
deprecated fields, we pass the max-resource values from INIT_HCA

The quota fields are moved to a new location, and the current kernel
driver takes the proper values from that location. There is
also a new flag in dword 0, bit 28 of the mlx4_QUERY_FUNC_CAP mailbox;
if this flag is set, the (VM) driver takes the quota values from the
new location.

VMs running previous kernels will work properly, except that the max resource
numbers reported in ib_query_device for these resources will be
too high.  The Hypervisor driver will, however, enforce the quotas
for these VMs.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jack Morgenstein 2013-11-03 10:03:24 +02:00 committed by David S. Miller
parent 5a0d0a6161
commit eb456a68c6
1 changed files with 65 additions and 23 deletions
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72
drivers/net/ethernet/mellanox/mlx4/fw.c
View File

@ -186,18 +186,26 @@ int mlx4_QUERY_FUNC_CAP_wrapper(struct mlx4_dev *dev, int slave,
#define QUERY_FUNC_CAP_NUM_PORTS_OFFSET 0x1
#define QUERY_FUNC_CAP_PF_BHVR_OFFSET 0x4
#define QUERY_FUNC_CAP_FMR_OFFSET 0x8
#define QUERY_FUNC_CAP_QP_QUOTA_OFFSET 0x10
#define QUERY_FUNC_CAP_CQ_QUOTA_OFFSET 0x14
#define QUERY_FUNC_CAP_SRQ_QUOTA_OFFSET 0x18
#define QUERY_FUNC_CAP_MPT_QUOTA_OFFSET 0x20
#define QUERY_FUNC_CAP_MTT_QUOTA_OFFSET 0x24
#define QUERY_FUNC_CAP_MCG_QUOTA_OFFSET 0x28
#define QUERY_FUNC_CAP_QP_QUOTA_OFFSET_DEP 0x10
#define QUERY_FUNC_CAP_CQ_QUOTA_OFFSET_DEP 0x14
#define QUERY_FUNC_CAP_SRQ_QUOTA_OFFSET_DEP 0x18
#define QUERY_FUNC_CAP_MPT_QUOTA_OFFSET_DEP 0x20
#define QUERY_FUNC_CAP_MTT_QUOTA_OFFSET_DEP 0x24
#define QUERY_FUNC_CAP_MCG_QUOTA_OFFSET_DEP 0x28
#define QUERY_FUNC_CAP_MAX_EQ_OFFSET 0x2c
#define QUERY_FUNC_CAP_RESERVED_EQ_OFFSET 0x30
#define QUERY_FUNC_CAP_QP_QUOTA_OFFSET 0x50
#define QUERY_FUNC_CAP_CQ_QUOTA_OFFSET 0x54
#define QUERY_FUNC_CAP_SRQ_QUOTA_OFFSET 0x58
#define QUERY_FUNC_CAP_MPT_QUOTA_OFFSET 0x60
#define QUERY_FUNC_CAP_MTT_QUOTA_OFFSET 0x64
#define QUERY_FUNC_CAP_MCG_QUOTA_OFFSET 0x68
#define QUERY_FUNC_CAP_FMR_FLAG 0x80
#define QUERY_FUNC_CAP_FLAG_RDMA 0x40
#define QUERY_FUNC_CAP_FLAG_ETH 0x80
#define QUERY_FUNC_CAP_FLAG_QUOTAS 0x10
/* when opcode modifier = 1 */
#define QUERY_FUNC_CAP_PHYS_PORT_OFFSET 0x3
@ -238,8 +246,9 @@ int mlx4_QUERY_FUNC_CAP_wrapper(struct mlx4_dev *dev, int slave,
MLX4_PUT(outbox->buf, size, QUERY_FUNC_CAP_QP1_PROXY);
} else if (vhcr->op_modifier == 0) {
/* enable rdma and ethernet interfaces */
field = (QUERY_FUNC_CAP_FLAG_ETH | QUERY_FUNC_CAP_FLAG_RDMA);
/* enable rdma and ethernet interfaces, and new quota locations */
field = (QUERY_FUNC_CAP_FLAG_ETH | QUERY_FUNC_CAP_FLAG_RDMA |
QUERY_FUNC_CAP_FLAG_QUOTAS);
MLX4_PUT(outbox->buf, field, QUERY_FUNC_CAP_FLAGS_OFFSET);
field = dev->caps.num_ports;
@ -253,12 +262,18 @@ int mlx4_QUERY_FUNC_CAP_wrapper(struct mlx4_dev *dev, int slave,
size = priv->mfunc.master.res_tracker.res_alloc[RES_QP].quota[slave];
MLX4_PUT(outbox->buf, size, QUERY_FUNC_CAP_QP_QUOTA_OFFSET);
size = dev->caps.num_qps;
MLX4_PUT(outbox->buf, size, QUERY_FUNC_CAP_QP_QUOTA_OFFSET_DEP);
size = priv->mfunc.master.res_tracker.res_alloc[RES_SRQ].quota[slave];
MLX4_PUT(outbox->buf, size, QUERY_FUNC_CAP_SRQ_QUOTA_OFFSET);
size = dev->caps.num_srqs;
MLX4_PUT(outbox->buf, size, QUERY_FUNC_CAP_SRQ_QUOTA_OFFSET_DEP);
size = priv->mfunc.master.res_tracker.res_alloc[RES_CQ].quota[slave];
MLX4_PUT(outbox->buf, size, QUERY_FUNC_CAP_CQ_QUOTA_OFFSET);
size = dev->caps.num_cqs;
MLX4_PUT(outbox->buf, size, QUERY_FUNC_CAP_CQ_QUOTA_OFFSET_DEP);
size = dev->caps.num_eqs;
MLX4_PUT(outbox->buf, size, QUERY_FUNC_CAP_MAX_EQ_OFFSET);
@ -268,12 +283,17 @@ int mlx4_QUERY_FUNC_CAP_wrapper(struct mlx4_dev *dev, int slave,
size = priv->mfunc.master.res_tracker.res_alloc[RES_MPT].quota[slave];
MLX4_PUT(outbox->buf, size, QUERY_FUNC_CAP_MPT_QUOTA_OFFSET);
size = dev->caps.num_mpts;
MLX4_PUT(outbox->buf, size, QUERY_FUNC_CAP_MPT_QUOTA_OFFSET_DEP);
size = priv->mfunc.master.res_tracker.res_alloc[RES_MTT].quota[slave];
MLX4_PUT(outbox->buf, size, QUERY_FUNC_CAP_MTT_QUOTA_OFFSET);
size = dev->caps.num_mtts;
MLX4_PUT(outbox->buf, size, QUERY_FUNC_CAP_MTT_QUOTA_OFFSET_DEP);
size = dev->caps.num_mgms + dev->caps.num_amgms;
MLX4_PUT(outbox->buf, size, QUERY_FUNC_CAP_MCG_QUOTA_OFFSET);
MLX4_PUT(outbox->buf, size, QUERY_FUNC_CAP_MCG_QUOTA_OFFSET_DEP);
} else
err = -EINVAL;
@ -288,7 +308,7 @@ int mlx4_QUERY_FUNC_CAP(struct mlx4_dev *dev, u32 gen_or_port,
u32 *outbox;
u8 field, op_modifier;
u32 size;
int err = 0;
int err = 0, quotas = 0;
op_modifier = !!gen_or_port; /* 0 = general, 1 = logical port */
@ -312,6 +332,7 @@ int mlx4_QUERY_FUNC_CAP(struct mlx4_dev *dev, u32 gen_or_port,
goto out;
}
func_cap->flags = field;
quotas = !!(func_cap->flags & QUERY_FUNC_CAP_FLAG_QUOTAS);
MLX4_GET(field, outbox, QUERY_FUNC_CAP_NUM_PORTS_OFFSET);
func_cap->num_ports = field;
@ -319,6 +340,7 @@ int mlx4_QUERY_FUNC_CAP(struct mlx4_dev *dev, u32 gen_or_port,
MLX4_GET(size, outbox, QUERY_FUNC_CAP_PF_BHVR_OFFSET);
func_cap->pf_context_behaviour = size;
if (quotas) {
MLX4_GET(size, outbox, QUERY_FUNC_CAP_QP_QUOTA_OFFSET);
func_cap->qp_quota = size & 0xFFFFFF;
@ -328,12 +350,6 @@ int mlx4_QUERY_FUNC_CAP(struct mlx4_dev *dev, u32 gen_or_port,
MLX4_GET(size, outbox, QUERY_FUNC_CAP_CQ_QUOTA_OFFSET);
func_cap->cq_quota = size & 0xFFFFFF;
MLX4_GET(size, outbox, QUERY_FUNC_CAP_MAX_EQ_OFFSET);
func_cap->max_eq = size & 0xFFFFFF;
MLX4_GET(size, outbox, QUERY_FUNC_CAP_RESERVED_EQ_OFFSET);
func_cap->reserved_eq = size & 0xFFFFFF;
MLX4_GET(size, outbox, QUERY_FUNC_CAP_MPT_QUOTA_OFFSET);
func_cap->mpt_quota = size & 0xFFFFFF;
@ -342,6 +358,32 @@ int mlx4_QUERY_FUNC_CAP(struct mlx4_dev *dev, u32 gen_or_port,
MLX4_GET(size, outbox, QUERY_FUNC_CAP_MCG_QUOTA_OFFSET);
func_cap->mcg_quota = size & 0xFFFFFF;
} else {
MLX4_GET(size, outbox, QUERY_FUNC_CAP_QP_QUOTA_OFFSET_DEP);
func_cap->qp_quota = size & 0xFFFFFF;
MLX4_GET(size, outbox, QUERY_FUNC_CAP_SRQ_QUOTA_OFFSET_DEP);
func_cap->srq_quota = size & 0xFFFFFF;
MLX4_GET(size, outbox, QUERY_FUNC_CAP_CQ_QUOTA_OFFSET_DEP);
func_cap->cq_quota = size & 0xFFFFFF;
MLX4_GET(size, outbox, QUERY_FUNC_CAP_MPT_QUOTA_OFFSET_DEP);
func_cap->mpt_quota = size & 0xFFFFFF;
MLX4_GET(size, outbox, QUERY_FUNC_CAP_MTT_QUOTA_OFFSET_DEP);
func_cap->mtt_quota = size & 0xFFFFFF;
MLX4_GET(size, outbox, QUERY_FUNC_CAP_MCG_QUOTA_OFFSET_DEP);
func_cap->mcg_quota = size & 0xFFFFFF;
}
MLX4_GET(size, outbox, QUERY_FUNC_CAP_MAX_EQ_OFFSET);
func_cap->max_eq = size & 0xFFFFFF;
MLX4_GET(size, outbox, QUERY_FUNC_CAP_RESERVED_EQ_OFFSET);
func_cap->reserved_eq = size & 0xFFFFFF;
goto out;
}