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net/mlx4_core: Fix number of EQs used in ICM initialisation

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In SRIOV mode, the number of EQs used when computing the total ICM size
was incorrect.

To fix this, we do the following:
1. We add a new structure to mlx4_dev, mlx4_phys_caps, to contain physical HCA
   capabilities.  The PPF uses the phys capabilities when it computes things
   like ICM size.

   The dev_caps structure will then contain the paravirtualized values, making
   bookkeeping much easier in SRIOV mode. We add a structure rather than a
   single parameter because there will be other fields in the phys_caps.

   The first field we add to the mlx4_phys_caps structure is num_phys_eqs.

2. In INIT_HCA, when running in SRIOV mode, the "log_num_eqs" parameter
   passed to the FW is the number of EQs per VF/PF; each function (PF or VF)
   has this number of EQs available.

   However, the total number of EQs which must be allowed for in the ICM is
   (1 << log_num_eqs) * (#VFs + #PFs).  Rather than compute this quantity,
   we allocate ICM space for 1024 EQs (which is the device maximum
   number of EQs, and which is the value we place in the mlx4_phys_caps structure).

   For INIT_HCA, however, we use the per-function number of EQs as described
   above.

Signed-off-by: Marcel Apfelbaum <marcela@dev.mellanox.co.il>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Marcel Apfelbaum 2012-05-30 09:14:51 +00:00 committed by David S. Miller
parent 30f7c73bed
commit 3fc929e2d6
3 changed files with 17 additions and 15 deletions
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17
drivers/net/ethernet/mellanox/mlx4/main.c
View File

@ -142,12 +142,6 @@ struct mlx4_port_config {
struct pci_dev *pdev;
};
static inline int mlx4_master_get_num_eqs(struct mlx4_dev *dev)
{
return dev->caps.reserved_eqs +
MLX4_MFUNC_EQ_NUM * (dev->num_slaves + 1);
}
int mlx4_check_port_params(struct mlx4_dev *dev,
enum mlx4_port_type *port_type)
{
@ -217,6 +211,7 @@ static int mlx4_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
}
dev->caps.num_ports = dev_cap->num_ports;
dev->phys_caps.num_phys_eqs = MLX4_MAX_EQ_NUM;
for (i = 1; i <= dev->caps.num_ports; ++i) {
dev->caps.vl_cap[i] = dev_cap->max_vl[i];
dev->caps.ib_mtu_cap[i] = dev_cap->ib_mtu[i];
@ -810,9 +805,8 @@ static int mlx4_init_cmpt_table(struct mlx4_dev *dev, u64 cmpt_base,
if (err)
goto err_srq;
num_eqs = (mlx4_is_master(dev)) ?
roundup_pow_of_two(mlx4_master_get_num_eqs(dev)) :
dev->caps.num_eqs;
num_eqs = (mlx4_is_master(dev)) ? dev->phys_caps.num_phys_eqs :
dev->caps.num_eqs;
err = mlx4_init_icm_table(dev, &priv->eq_table.cmpt_table,
cmpt_base +
((u64) (MLX4_CMPT_TYPE_EQ *
@ -874,9 +868,8 @@ static int mlx4_init_icm(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap,
}
num_eqs = (mlx4_is_master(dev)) ?
roundup_pow_of_two(mlx4_master_get_num_eqs(dev)) :
dev->caps.num_eqs;
num_eqs = (mlx4_is_master(dev)) ? dev->phys_caps.num_phys_eqs :
dev->caps.num_eqs;
err = mlx4_init_icm_table(dev, &priv->eq_table.table,
init_hca->eqc_base, dev_cap->eqc_entry_sz,
num_eqs, num_eqs, 0, 0);

9
drivers/net/ethernet/mellanox/mlx4/profile.c
View File

@ -126,7 +126,9 @@ u64 mlx4_make_profile(struct mlx4_dev *dev,
profile[MLX4_RES_AUXC].num = request->num_qp;
profile[MLX4_RES_SRQ].num = request->num_srq;
profile[MLX4_RES_CQ].num = request->num_cq;
profile[MLX4_RES_EQ].num = min_t(unsigned, dev_cap->max_eqs, MAX_MSIX);
profile[MLX4_RES_EQ].num = mlx4_is_mfunc(dev) ?
dev->phys_caps.num_phys_eqs :
min_t(unsigned, dev_cap->max_eqs, MAX_MSIX);
profile[MLX4_RES_DMPT].num = request->num_mpt;
profile[MLX4_RES_CMPT].num = MLX4_NUM_CMPTS;
profile[MLX4_RES_MTT].num = request->num_mtt * (1 << log_mtts_per_seg);
@ -215,9 +217,10 @@ u64 mlx4_make_profile(struct mlx4_dev *dev,
init_hca->log_num_cqs = profile[i].log_num;
break;
case MLX4_RES_EQ:
dev->caps.num_eqs = profile[i].num;
dev->caps.num_eqs = roundup_pow_of_two(min_t(unsigned, dev_cap->max_eqs,
MAX_MSIX));
init_hca->eqc_base = profile[i].start;
init_hca->log_num_eqs = profile[i].log_num;
init_hca->log_num_eqs = ilog2(dev->caps.num_eqs);
break;
case MLX4_RES_DMPT:
dev->caps.num_mpts = profile[i].num;

6
include/linux/mlx4/device.h
View File

@ -64,6 +64,7 @@ enum {
MLX4_MAX_NUM_PF = 16,
MLX4_MAX_NUM_VF = 64,
MLX4_MFUNC_MAX = 80,
MLX4_MAX_EQ_NUM = 1024,
MLX4_MFUNC_EQ_NUM = 4,
MLX4_MFUNC_MAX_EQES = 8,
MLX4_MFUNC_EQE_MASK = (MLX4_MFUNC_MAX_EQES - 1)
@ -239,6 +240,10 @@ static inline u64 mlx4_fw_ver(u64 major, u64 minor, u64 subminor)
return (major << 32) | (minor << 16) | subminor;
}
struct mlx4_phys_caps {
u32 num_phys_eqs;
};
struct mlx4_caps {
u64 fw_ver;
u32 function;
@ -499,6 +504,7 @@ struct mlx4_dev {
unsigned long flags;
unsigned long num_slaves;
struct mlx4_caps caps;
struct mlx4_phys_caps phys_caps;
struct radix_tree_root qp_table_tree;
u8 rev_id;
char board_id[MLX4_BOARD_ID_LEN];