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net/mlx4: Add EQ pool 

Previously, mlx4_en allocated EQs and used them exclusively.
This affected RoCE performance, as applications which are
events sensitive were limited to use only the legacy EQs.

Change that by introducing an EQ pool. This pool is managed
by mlx4_core. EQs are assigned to ports (when there are limited
number of EQs, multiple ports could be assigned to the same EQs).

An exception to this rule is the ASYNC EQ which handles various events.

Legacy EQs are completely removed as all EQs could be shared.

When a consumer (mlx4_ib/mlx4_en) requests an EQ, it asks for
EQ serving on a specific port. The core driver calculates which
EQ should be assigned to that request.

Because IRQs are shared between IB and Ethernet modules, their
names only include the PCI device BDF address.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Ido Shamay <idos@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Matan Barak 2015-05-31 09:30:16 +03:00 committed by David S. Miller
parent 48564135cb
commit c66fa19c40
11 changed files with 343 additions and 260 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

71
drivers/infiniband/hw/mlx4/main.c
View File

@ -2041,77 +2041,52 @@ static void init_pkeys(struct mlx4_ib_dev *ibdev)
static void mlx4_ib_alloc_eqs(struct mlx4_dev *dev, struct mlx4_ib_dev *ibdev)
{
char name[80];
int eq_per_port = 0;
int added_eqs = 0;
int total_eqs = 0;
int i, j, eq;
int i, j, eq = 0, total_eqs = 0;
/* Legacy mode or comp_pool is not large enough */
if (dev->caps.comp_pool == 0 ||
dev->caps.num_ports > dev->caps.comp_pool)
return;
eq_per_port = dev->caps.comp_pool / dev->caps.num_ports;
/* Init eq table */
added_eqs = 0;
mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB)
added_eqs += eq_per_port;
total_eqs = dev->caps.num_comp_vectors + added_eqs;
ibdev->eq_table = kzalloc(total_eqs * sizeof(int), GFP_KERNEL);
ibdev->eq_table = kcalloc(dev->caps.num_comp_vectors,
sizeof(ibdev->eq_table[0]), GFP_KERNEL);
if (!ibdev->eq_table)
return;
ibdev->eq_added = added_eqs;
eq = 0;
mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB) {
for (j = 0; j < eq_per_port; j++) {
snprintf(name, sizeof(name), "mlx4-ib-%d-%d@%s",
i, j, dev->persist->pdev->bus->name);
/* Set IRQ for specific name (per ring) */
if (mlx4_assign_eq(dev, name, NULL,
&ibdev->eq_table[eq])) {
/* Use legacy (same as mlx4_en driver) */
pr_warn("Can't allocate EQ %d; reverting to legacy\n", eq);
ibdev->eq_table[eq] =
(eq % dev->caps.num_comp_vectors);
}
eq++;
for (i = 1; i <= dev->caps.num_ports; i++) {
for (j = 0; j < mlx4_get_eqs_per_port(dev, i);
j++, total_eqs++) {
if (i > 1 && mlx4_is_eq_shared(dev, total_eqs))
continue;
ibdev->eq_table[eq] = total_eqs;
if (!mlx4_assign_eq(dev, i,
&ibdev->eq_table[eq]))
eq++;
else
ibdev->eq_table[eq] = -1;
}
}
/* Fill the reset of the vector with legacy EQ */
for (i = 0, eq = added_eqs; i < dev->caps.num_comp_vectors; i++)
ibdev->eq_table[eq++] = i;
for (i = eq; i < dev->caps.num_comp_vectors;
ibdev->eq_table[i++] = -1)
;
/* Advertise the new number of EQs to clients */
ibdev->ib_dev.num_comp_vectors = total_eqs;
ibdev->ib_dev.num_comp_vectors = eq;
}
static void mlx4_ib_free_eqs(struct mlx4_dev *dev, struct mlx4_ib_dev *ibdev)
{
int i;
int total_eqs = ibdev->ib_dev.num_comp_vectors;
/* no additional eqs were added */
/* no eqs were allocated */
if (!ibdev->eq_table)
return;
/* Reset the advertised EQ number */
ibdev->ib_dev.num_comp_vectors = dev->caps.num_comp_vectors;
ibdev->ib_dev.num_comp_vectors = 0;
/* Free only the added eqs */
for (i = 0; i < ibdev->eq_added; i++) {
/* Don't free legacy eqs if used */
if (ibdev->eq_table[i] <= dev->caps.num_comp_vectors)
continue;
for (i = 0; i < total_eqs; i++)
mlx4_release_eq(dev, ibdev->eq_table[i]);
}
kfree(ibdev->eq_table);
ibdev->eq_table = NULL;
}
static void *mlx4_ib_add(struct mlx4_dev *dev)

1
drivers/infiniband/hw/mlx4/mlx4_ib.h
View File

@ -523,7 +523,6 @@ struct mlx4_ib_dev {
struct mlx4_ib_iboe iboe;
int counters[MLX4_MAX_PORTS];
int *eq_table;
int eq_added;
struct kobject *iov_parent;
struct kobject *ports_parent;
struct kobject *dev_ports_parent[MLX4_MFUNC_MAX];

10
drivers/net/ethernet/mellanox/mlx4/cq.c
View File

@ -292,7 +292,7 @@ int mlx4_cq_alloc(struct mlx4_dev *dev, int nent,
u64 mtt_addr;
int err;
if (vector > dev->caps.num_comp_vectors + dev->caps.comp_pool)
if (vector >= dev->caps.num_comp_vectors)
return -EINVAL;
cq->vector = vector;
@ -319,7 +319,7 @@ int mlx4_cq_alloc(struct mlx4_dev *dev, int nent,
cq_context->flags |= cpu_to_be32(1 << 19);
cq_context->logsize_usrpage = cpu_to_be32((ilog2(nent) << 24) | uar->index);
cq_context->comp_eqn = priv->eq_table.eq[vector].eqn;
cq_context->comp_eqn = priv->eq_table.eq[MLX4_CQ_TO_EQ_VECTOR(vector)].eqn;
cq_context->log_page_size = mtt->page_shift - MLX4_ICM_PAGE_SHIFT;
mtt_addr = mlx4_mtt_addr(dev, mtt);
@ -339,11 +339,11 @@ int mlx4_cq_alloc(struct mlx4_dev *dev, int nent,
init_completion(&cq->free);
cq->comp = mlx4_add_cq_to_tasklet;
cq->tasklet_ctx.priv =
&priv->eq_table.eq[cq->vector].tasklet_ctx;
&priv->eq_table.eq[MLX4_CQ_TO_EQ_VECTOR(vector)].tasklet_ctx;
INIT_LIST_HEAD(&cq->tasklet_ctx.list);
cq->irq = priv->eq_table.eq[cq->vector].irq;
cq->irq = priv->eq_table.eq[MLX4_CQ_TO_EQ_VECTOR(vector)].irq;
return 0;
err_radix:
@ -368,7 +368,7 @@ void mlx4_cq_free(struct mlx4_dev *dev, struct mlx4_cq *cq)
if (err)
mlx4_warn(dev, "HW2SW_CQ failed (%d) for CQN %06x\n", err, cq->cqn);
synchronize_irq(priv->eq_table.eq[cq->vector].irq);
synchronize_irq(priv->eq_table.eq[MLX4_CQ_TO_EQ_VECTOR(cq->vector)].irq);
spin_lock_irq(&cq_table->lock);
radix_tree_delete(&cq_table->tree, cq->cqn);

46
drivers/net/ethernet/mellanox/mlx4/en_cq.c
View File

@ -66,6 +66,7 @@ int mlx4_en_create_cq(struct mlx4_en_priv *priv,
cq->ring = ring;
cq->is_tx = mode;
cq->vector = mdev->dev->caps.num_comp_vectors;
/* Allocate HW buffers on provided NUMA node.
* dev->numa_node is used in mtt range allocation flow.
@ -101,12 +102,7 @@ int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq,
int err = 0;
char name[25];
int timestamp_en = 0;
struct cpu_rmap *rmap =
#ifdef CONFIG_RFS_ACCEL
priv->dev->rx_cpu_rmap;
#else
NULL;
#endif
bool assigned_eq = false;
cq->dev = mdev->pndev[priv->port];
cq->mcq.set_ci_db = cq->wqres.db.db;
@ -116,23 +112,19 @@ int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq,
memset(cq->buf, 0, cq->buf_size);
if (cq->is_tx == RX) {
if (mdev->dev->caps.comp_pool) {
if (!cq->vector) {
sprintf(name, "%s-%d", priv->dev->name,
cq->ring);
/* Set IRQ for specific name (per ring) */
if (mlx4_assign_eq(mdev->dev, name, rmap,
&cq->vector)) {
cq->vector = (cq->ring + 1 + priv->port)
% mdev->dev->caps.num_comp_vectors;
mlx4_warn(mdev, "Failed assigning an EQ to %s, falling back to legacy EQ's\n",
name);
}
if (!mlx4_is_eq_vector_valid(mdev->dev, priv->port,
cq->vector)) {
cq->vector = cq_idx;
err = mlx4_assign_eq(mdev->dev, priv->port,
&cq->vector);
if (err) {
mlx4_err(mdev, "Failed assigning an EQ to %s\n",
name);
goto free_eq;
}
} else {
cq->vector = (cq->ring + 1 + priv->port) %
mdev->dev->caps.num_comp_vectors;
assigned_eq = true;
}
cq->irq_desc =
@ -159,7 +151,7 @@ int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq,
&mdev->priv_uar, cq->wqres.db.dma, &cq->mcq,
cq->vector, 0, timestamp_en);
if (err)
return err;
goto free_eq;
cq->mcq.comp = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq;
cq->mcq.event = mlx4_en_cq_event;
@ -182,6 +174,12 @@ int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq,
napi_enable(&cq->napi);
return 0;
free_eq:
if (assigned_eq)
mlx4_release_eq(mdev->dev, cq->vector);
cq->vector = mdev->dev->caps.num_comp_vectors;
return err;
}
void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq **pcq)
@ -191,9 +189,9 @@ void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq **pcq)
mlx4_en_unmap_buffer(&cq->wqres.buf);
mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
if (priv->mdev->dev->caps.comp_pool && cq->vector) {
if (mlx4_is_eq_vector_valid(mdev->dev, priv->port, cq->vector) &&
cq->is_tx == RX)
mlx4_release_eq(priv->mdev->dev, cq->vector);
}
cq->vector = 0;
cq->buf_size = 0;
cq->buf = NULL;

7
drivers/net/ethernet/mellanox/mlx4/en_netdev.c
View File

@ -1958,7 +1958,6 @@ void mlx4_en_free_resources(struct mlx4_en_priv *priv)
int i;
#ifdef CONFIG_RFS_ACCEL
free_irq_cpu_rmap(priv->dev->rx_cpu_rmap);
priv->dev->rx_cpu_rmap = NULL;
#endif
@ -2016,11 +2015,7 @@ int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
}
#ifdef CONFIG_RFS_ACCEL
if (priv->mdev->dev->caps.comp_pool) {
priv->dev->rx_cpu_rmap = alloc_irq_cpu_rmap(priv->mdev->dev->caps.comp_pool);
if (!priv->dev->rx_cpu_rmap)
goto err;
}
priv->dev->rx_cpu_rmap = mlx4_get_cpu_rmap(priv->mdev->dev, priv->port);
#endif
return 0;

13
drivers/net/ethernet/mellanox/mlx4/en_rx.c
View File

@ -337,15 +337,10 @@ void mlx4_en_set_num_rx_rings(struct mlx4_en_dev *mdev)
struct mlx4_dev *dev = mdev->dev;
mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
if (!dev->caps.comp_pool)
num_of_eqs = max_t(int, MIN_RX_RINGS,
min_t(int,
dev->caps.num_comp_vectors,
DEF_RX_RINGS));
else
num_of_eqs = min_t(int, MAX_MSIX_P_PORT,
dev->caps.comp_pool/
dev->caps.num_ports) - 1;
num_of_eqs = max_t(int, MIN_RX_RINGS,
min_t(int,
mlx4_get_eqs_per_port(mdev->dev, i),
DEF_RX_RINGS));
num_rx_rings = mlx4_low_memory_profile() ? MIN_RX_RINGS :
min_t(int, num_of_eqs,

357
drivers/net/ethernet/mellanox/mlx4/eq.c
View File

@ -895,8 +895,8 @@ static int mlx4_num_eq_uar(struct mlx4_dev *dev)
* we need to map, take the difference of highest index and
* the lowest index we'll use and add 1.
*/
return (dev->caps.num_comp_vectors + 1 + dev->caps.reserved_eqs +
dev->caps.comp_pool)/4 - dev->caps.reserved_eqs/4 + 1;
return (dev->caps.num_comp_vectors + 1 + dev->caps.reserved_eqs) / 4 -
dev->caps.reserved_eqs / 4 + 1;
}
static void __iomem *mlx4_get_eq_uar(struct mlx4_dev *dev, struct mlx4_eq *eq)
@ -1085,8 +1085,7 @@ static void mlx4_free_eq(struct mlx4_dev *dev,
static void mlx4_free_irqs(struct mlx4_dev *dev)
{
struct mlx4_eq_table *eq_table = &mlx4_priv(dev)->eq_table;
struct mlx4_priv *priv = mlx4_priv(dev);
int i, vec;
int i;
if (eq_table->have_irq)
free_irq(dev->persist->pdev->irq, dev);
@ -1097,20 +1096,6 @@ static void mlx4_free_irqs(struct mlx4_dev *dev)
eq_table->eq[i].have_irq = 0;
}
for (i = 0; i < dev->caps.comp_pool; i++) {
/*
* Freeing the assigned irq's
* all bits should be 0, but we need to validate
*/
if (priv->msix_ctl.pool_bm & 1ULL << i) {
/* NO need protecting*/
vec = dev->caps.num_comp_vectors + 1 + i;
free_irq(priv->eq_table.eq[vec].irq,
&priv->eq_table.eq[vec]);
}
}
kfree(eq_table->irq_names);
}
@ -1191,76 +1176,73 @@ int mlx4_init_eq_table(struct mlx4_dev *dev)
}
priv->eq_table.irq_names =
kmalloc(MLX4_IRQNAME_SIZE * (dev->caps.num_comp_vectors + 1 +
dev->caps.comp_pool),
kmalloc(MLX4_IRQNAME_SIZE * (dev->caps.num_comp_vectors + 1),
GFP_KERNEL);
if (!priv->eq_table.irq_names) {
err = -ENOMEM;
goto err_out_bitmap;
goto err_out_clr_int;
}
for (i = 0; i < dev->caps.num_comp_vectors; ++i) {
err = mlx4_create_eq(dev, dev->caps.num_cqs -
dev->caps.reserved_cqs +
MLX4_NUM_SPARE_EQE,
(dev->flags & MLX4_FLAG_MSI_X) ? i : 0,
&priv->eq_table.eq[i]);
if (err) {
--i;
goto err_out_unmap;
for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i) {
if (i == MLX4_EQ_ASYNC) {
err = mlx4_create_eq(dev,
MLX4_NUM_ASYNC_EQE + MLX4_NUM_SPARE_EQE,
0, &priv->eq_table.eq[MLX4_EQ_ASYNC]);
} else {
#ifdef CONFIG_RFS_ACCEL
struct mlx4_eq *eq = &priv->eq_table.eq[i];
int port = find_first_bit(eq->actv_ports.ports,
dev->caps.num_ports) + 1;
if (port <= dev->caps.num_ports) {
struct mlx4_port_info *info =
&mlx4_priv(dev)->port[port];
if (!info->rmap) {
info->rmap = alloc_irq_cpu_rmap(
mlx4_get_eqs_per_port(dev, port));
if (!info->rmap) {
mlx4_warn(dev, "Failed to allocate cpu rmap\n");
err = -ENOMEM;
goto err_out_unmap;
}
}
err = irq_cpu_rmap_add(
info->rmap, eq->irq);
if (err)
mlx4_warn(dev, "Failed adding irq rmap\n");
}
#endif
err = mlx4_create_eq(dev, dev->caps.num_cqs -
dev->caps.reserved_cqs +
MLX4_NUM_SPARE_EQE,
(dev->flags & MLX4_FLAG_MSI_X) ?
i + 1 - !!(i > MLX4_EQ_ASYNC) : 0,
eq);
}
}
err = mlx4_create_eq(dev, MLX4_NUM_ASYNC_EQE + MLX4_NUM_SPARE_EQE,
(dev->flags & MLX4_FLAG_MSI_X) ? dev->caps.num_comp_vectors : 0,
&priv->eq_table.eq[dev->caps.num_comp_vectors]);
if (err)
goto err_out_comp;
/*if additional completion vectors poolsize is 0 this loop will not run*/
for (i = dev->caps.num_comp_vectors + 1;
i < dev->caps.num_comp_vectors + dev->caps.comp_pool + 1; ++i) {
err = mlx4_create_eq(dev, dev->caps.num_cqs -
dev->caps.reserved_cqs +
MLX4_NUM_SPARE_EQE,
(dev->flags & MLX4_FLAG_MSI_X) ? i : 0,
&priv->eq_table.eq[i]);
if (err) {
--i;
if (err)
goto err_out_unmap;
}
}
if (dev->flags & MLX4_FLAG_MSI_X) {
const char *eq_name;
for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i) {
if (i < dev->caps.num_comp_vectors) {
snprintf(priv->eq_table.irq_names +
i * MLX4_IRQNAME_SIZE,
MLX4_IRQNAME_SIZE,
"mlx4-comp-%d@pci:%s", i,
pci_name(dev->persist->pdev));
} else {
snprintf(priv->eq_table.irq_names +
i * MLX4_IRQNAME_SIZE,
MLX4_IRQNAME_SIZE,
"mlx4-async@pci:%s",
pci_name(dev->persist->pdev));
}
snprintf(priv->eq_table.irq_names +
MLX4_EQ_ASYNC * MLX4_IRQNAME_SIZE,
MLX4_IRQNAME_SIZE,
"mlx4-async@pci:%s",
pci_name(dev->persist->pdev));
eq_name = priv->eq_table.irq_names +
MLX4_EQ_ASYNC * MLX4_IRQNAME_SIZE;
eq_name = priv->eq_table.irq_names +
i * MLX4_IRQNAME_SIZE;
err = request_irq(priv->eq_table.eq[i].irq,
mlx4_msi_x_interrupt, 0, eq_name,
priv->eq_table.eq + i);
if (err)
goto err_out_async;
err = request_irq(priv->eq_table.eq[MLX4_EQ_ASYNC].irq,
mlx4_msi_x_interrupt, 0, eq_name,
priv->eq_table.eq + MLX4_EQ_ASYNC);
if (err)
goto err_out_unmap;
priv->eq_table.eq[i].have_irq = 1;
}
priv->eq_table.eq[MLX4_EQ_ASYNC].have_irq = 1;
} else {
snprintf(priv->eq_table.irq_names,
MLX4_IRQNAME_SIZE,
@ -1269,36 +1251,38 @@ int mlx4_init_eq_table(struct mlx4_dev *dev)
err = request_irq(dev->persist->pdev->irq, mlx4_interrupt,
IRQF_SHARED, priv->eq_table.irq_names, dev);
if (err)
goto err_out_async;
goto err_out_unmap;
priv->eq_table.have_irq = 1;
}
err = mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0,
priv->eq_table.eq[dev->caps.num_comp_vectors].eqn);
priv->eq_table.eq[MLX4_EQ_ASYNC].eqn);
if (err)
mlx4_warn(dev, "MAP_EQ for async EQ %d failed (%d)\n",
priv->eq_table.eq[dev->caps.num_comp_vectors].eqn, err);
priv->eq_table.eq[MLX4_EQ_ASYNC].eqn, err);
for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
eq_set_ci(&priv->eq_table.eq[i], 1);
/* arm ASYNC eq */
eq_set_ci(&priv->eq_table.eq[MLX4_EQ_ASYNC], 1);
return 0;
err_out_async:
mlx4_free_eq(dev, &priv->eq_table.eq[dev->caps.num_comp_vectors]);
err_out_comp:
i = dev->caps.num_comp_vectors - 1;
err_out_unmap:
while (i >= 0) {
mlx4_free_eq(dev, &priv->eq_table.eq[i]);
--i;
while (i >= 0)
mlx4_free_eq(dev, &priv->eq_table.eq[i--]);
#ifdef CONFIG_RFS_ACCEL
for (i = 1; i <= dev->caps.num_ports; i++) {
if (mlx4_priv(dev)->port[i].rmap) {
free_irq_cpu_rmap(mlx4_priv(dev)->port[i].rmap);
mlx4_priv(dev)->port[i].rmap = NULL;
}
}
#endif
mlx4_free_irqs(dev);
err_out_clr_int:
if (!mlx4_is_slave(dev))
mlx4_unmap_clr_int(dev);
mlx4_free_irqs(dev);
err_out_bitmap:
mlx4_unmap_uar(dev);
@ -1316,11 +1300,19 @@ void mlx4_cleanup_eq_table(struct mlx4_dev *dev)
int i;
mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 1,
priv->eq_table.eq[dev->caps.num_comp_vectors].eqn);
priv->eq_table.eq[MLX4_EQ_ASYNC].eqn);
#ifdef CONFIG_RFS_ACCEL
for (i = 1; i <= dev->caps.num_ports; i++) {
if (mlx4_priv(dev)->port[i].rmap) {
free_irq_cpu_rmap(mlx4_priv(dev)->port[i].rmap);
mlx4_priv(dev)->port[i].rmap = NULL;
}
}
#endif
mlx4_free_irqs(dev);
for (i = 0; i < dev->caps.num_comp_vectors + dev->caps.comp_pool + 1; ++i)
for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
mlx4_free_eq(dev, &priv->eq_table.eq[i]);
if (!mlx4_is_slave(dev))
@ -1371,87 +1363,166 @@ int mlx4_test_interrupts(struct mlx4_dev *dev)
/* Return to default */
mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0,
priv->eq_table.eq[dev->caps.num_comp_vectors].eqn);
priv->eq_table.eq[MLX4_EQ_ASYNC].eqn);
return err;
}
EXPORT_SYMBOL(mlx4_test_interrupts);
int mlx4_assign_eq(struct mlx4_dev *dev, char *name, struct cpu_rmap *rmap,
int *vector)
bool mlx4_is_eq_vector_valid(struct mlx4_dev *dev, u8 port, int vector)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int vec = 0, err = 0, i;
vector = MLX4_CQ_TO_EQ_VECTOR(vector);
if (vector < 0 || (vector >= dev->caps.num_comp_vectors + 1) ||
(vector == MLX4_EQ_ASYNC))
return false;
return test_bit(port - 1, priv->eq_table.eq[vector].actv_ports.ports);
}
EXPORT_SYMBOL(mlx4_is_eq_vector_valid);
u32 mlx4_get_eqs_per_port(struct mlx4_dev *dev, u8 port)
{
struct mlx4_priv *priv = mlx4_priv(dev);
unsigned int i;
unsigned int sum = 0;
for (i = 0; i < dev->caps.num_comp_vectors + 1; i++)
sum += !!test_bit(port - 1,
priv->eq_table.eq[i].actv_ports.ports);
return sum;
}
EXPORT_SYMBOL(mlx4_get_eqs_per_port);
int mlx4_is_eq_shared(struct mlx4_dev *dev, int vector)
{
struct mlx4_priv *priv = mlx4_priv(dev);
vector = MLX4_CQ_TO_EQ_VECTOR(vector);
if (vector <= 0 || (vector >= dev->caps.num_comp_vectors + 1))
return -EINVAL;
return !!(bitmap_weight(priv->eq_table.eq[vector].actv_ports.ports,
dev->caps.num_ports) > 1);
}
EXPORT_SYMBOL(mlx4_is_eq_shared);
struct cpu_rmap *mlx4_get_cpu_rmap(struct mlx4_dev *dev, int port)
{
return mlx4_priv(dev)->port[port].rmap;
}
EXPORT_SYMBOL(mlx4_get_cpu_rmap);
int mlx4_assign_eq(struct mlx4_dev *dev, u8 port, int *vector)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int err = 0, i = 0;
u32 min_ref_count_val = (u32)-1;
int requested_vector = MLX4_CQ_TO_EQ_VECTOR(*vector);
int *prequested_vector = NULL;
mutex_lock(&priv->msix_ctl.pool_lock);
for (i = 0; !vec && i < dev->caps.comp_pool; i++) {
if (~priv->msix_ctl.pool_bm & 1ULL << i) {
priv->msix_ctl.pool_bm |= 1ULL << i;
vec = dev->caps.num_comp_vectors + 1 + i;
snprintf(priv->eq_table.irq_names +
vec * MLX4_IRQNAME_SIZE,
MLX4_IRQNAME_SIZE, "%s", name);
#ifdef CONFIG_RFS_ACCEL
if (rmap) {
err = irq_cpu_rmap_add(rmap,
priv->eq_table.eq[vec].irq);
if (err)
mlx4_warn(dev, "Failed adding irq rmap\n");
}
#endif
err = request_irq(priv->eq_table.eq[vec].irq,
mlx4_msi_x_interrupt, 0,
&priv->eq_table.irq_names[vec<<5],
priv->eq_table.eq + vec);
if (err) {
/*zero out bit by fliping it*/
priv->msix_ctl.pool_bm ^= 1 << i;
vec = 0;
continue;
/*we dont want to break here*/
}
if (requested_vector < (dev->caps.num_comp_vectors + 1) &&
(requested_vector >= 0) &&
(requested_vector != MLX4_EQ_ASYNC)) {
if (test_bit(port - 1,
priv->eq_table.eq[requested_vector].actv_ports.ports)) {
prequested_vector = &requested_vector;
} else {
struct mlx4_eq *eq;
eq_set_ci(&priv->eq_table.eq[vec], 1);
for (i = 1; i < port;
requested_vector += mlx4_get_eqs_per_port(dev, i++))
;
eq = &priv->eq_table.eq[requested_vector];
if (requested_vector < dev->caps.num_comp_vectors + 1 &&
test_bit(port - 1, eq->actv_ports.ports)) {
prequested_vector = &requested_vector;
}
}
}
if (!prequested_vector) {
requested_vector = -1;
for (i = 0; min_ref_count_val && i < dev->caps.num_comp_vectors + 1;
i++) {
struct mlx4_eq *eq = &priv->eq_table.eq[i];
if (min_ref_count_val > eq->ref_count &&
test_bit(port - 1, eq->actv_ports.ports)) {
min_ref_count_val = eq->ref_count;
requested_vector = i;
}
}
if (requested_vector < 0) {
err = -ENOSPC;
goto err_unlock;
}
prequested_vector = &requested_vector;
}
if (!test_bit(*prequested_vector, priv->msix_ctl.pool_bm) &&
dev->flags & MLX4_FLAG_MSI_X) {
set_bit(*prequested_vector, priv->msix_ctl.pool_bm);
snprintf(priv->eq_table.irq_names +
*prequested_vector * MLX4_IRQNAME_SIZE,
MLX4_IRQNAME_SIZE, "mlx4-%d@%s",
*prequested_vector, dev_name(&dev->persist->pdev->dev));
err = request_irq(priv->eq_table.eq[*prequested_vector].irq,
mlx4_msi_x_interrupt, 0,
&priv->eq_table.irq_names[*prequested_vector << 5],
priv->eq_table.eq + *prequested_vector);
if (err) {
clear_bit(*prequested_vector, priv->msix_ctl.pool_bm);
*prequested_vector = -1;
} else {
eq_set_ci(&priv->eq_table.eq[*prequested_vector], 1);
priv->eq_table.eq[*prequested_vector].have_irq = 1;
}
}
if (!err && *prequested_vector >= 0)
priv->eq_table.eq[*prequested_vector].ref_count++;
err_unlock:
mutex_unlock(&priv->msix_ctl.pool_lock);
if (vec) {
*vector = vec;
} else {
if (!err && *prequested_vector >= 0)
*vector = MLX4_EQ_TO_CQ_VECTOR(*prequested_vector);
else
*vector = 0;
err = (i == dev->caps.comp_pool) ? -ENOSPC : err;
}
return err;
}
EXPORT_SYMBOL(mlx4_assign_eq);
int mlx4_eq_get_irq(struct mlx4_dev *dev, int vec)
int mlx4_eq_get_irq(struct mlx4_dev *dev, int cq_vec)
{
struct mlx4_priv *priv = mlx4_priv(dev);
return priv->eq_table.eq[vec].irq;
return priv->eq_table.eq[MLX4_CQ_TO_EQ_VECTOR(cq_vec)].irq;
}
EXPORT_SYMBOL(mlx4_eq_get_irq);
void mlx4_release_eq(struct mlx4_dev *dev, int vec)
{
struct mlx4_priv *priv = mlx4_priv(dev);
/*bm index*/
int i = vec - dev->caps.num_comp_vectors - 1;
int eq_vec = MLX4_CQ_TO_EQ_VECTOR(vec);
if (likely(i >= 0)) {
/*sanity check , making sure were not trying to free irq's
Belonging to a legacy EQ*/
mutex_lock(&priv->msix_ctl.pool_lock);
if (priv->msix_ctl.pool_bm & 1ULL << i) {
free_irq(priv->eq_table.eq[vec].irq,
&priv->eq_table.eq[vec]);
priv->msix_ctl.pool_bm &= ~(1ULL << i);
}
mutex_unlock(&priv->msix_ctl.pool_lock);
}
mutex_lock(&priv->msix_ctl.pool_lock);
priv->eq_table.eq[eq_vec].ref_count--;
/* once we allocated EQ, we don't release it because it might be binded
* to cpu_rmap.
*/
mutex_unlock(&priv->msix_ctl.pool_lock);
}
EXPORT_SYMBOL(mlx4_release_eq);

74
drivers/net/ethernet/mellanox/mlx4/main.c
View File

@ -2364,11 +2364,11 @@ static int mlx4_setup_hca(struct mlx4_dev *dev)
if (err) {
if (dev->flags & MLX4_FLAG_MSI_X) {
mlx4_warn(dev, "NOP command failed to generate MSI-X interrupt IRQ %d)\n",
priv->eq_table.eq[dev->caps.num_comp_vectors].irq);
priv->eq_table.eq[MLX4_EQ_ASYNC].irq);
mlx4_warn(dev, "Trying again without MSI-X\n");
} else {
mlx4_err(dev, "NOP command failed to generate interrupt (IRQ %d), aborting\n",
priv->eq_table.eq[dev->caps.num_comp_vectors].irq);
priv->eq_table.eq[MLX4_EQ_ASYNC].irq);
mlx4_err(dev, "BIOS or ACPI interrupt routing problem?\n");
}
@ -2486,9 +2486,10 @@ static void mlx4_enable_msi_x(struct mlx4_dev *dev)
struct mlx4_priv *priv = mlx4_priv(dev);
struct msix_entry *entries;
int i;
int port = 0;
if (msi_x) {
int nreq = dev->caps.num_ports * num_online_cpus() + MSIX_LEGACY_SZ;
int nreq = dev->caps.num_ports * num_online_cpus() + 1;
nreq = min_t(int, dev->caps.num_eqs - dev->caps.reserved_eqs,
nreq);
@ -2503,20 +2504,49 @@ static void mlx4_enable_msi_x(struct mlx4_dev *dev)
nreq = pci_enable_msix_range(dev->persist->pdev, entries, 2,
nreq);
if (nreq < 0) {
if (nreq < 0 || nreq < MLX4_EQ_ASYNC) {
kfree(entries);
goto no_msi;
} else if (nreq < MSIX_LEGACY_SZ +
dev->caps.num_ports * MIN_MSIX_P_PORT) {
/*Working in legacy mode , all EQ's shared*/
dev->caps.comp_pool = 0;
dev->caps.num_comp_vectors = nreq - 1;
} else {
dev->caps.comp_pool = nreq - MSIX_LEGACY_SZ;
dev->caps.num_comp_vectors = MSIX_LEGACY_SZ - 1;
}
for (i = 0; i < nreq; ++i)
priv->eq_table.eq[i].irq = entries[i].vector;
/* 1 is reserved for events (asyncrounous EQ) */
dev->caps.num_comp_vectors = nreq - 1;
priv->eq_table.eq[MLX4_EQ_ASYNC].irq = entries[0].vector;
bitmap_zero(priv->eq_table.eq[MLX4_EQ_ASYNC].actv_ports.ports,
dev->caps.num_ports);
for (i = 0; i < dev->caps.num_comp_vectors + 1; i++) {
if (i == MLX4_EQ_ASYNC)
continue;
priv->eq_table.eq[i].irq =
entries[i + 1 - !!(i > MLX4_EQ_ASYNC)].vector;
if (MLX4_IS_LEGACY_EQ_MODE(dev->caps)) {
bitmap_fill(priv->eq_table.eq[i].actv_ports.ports,
dev->caps.num_ports);
} else {
set_bit(port,
priv->eq_table.eq[i].actv_ports.ports);
}
/* We divide the Eqs evenly between the two ports.
* (dev->caps.num_comp_vectors / dev->caps.num_ports)
* refers to the number of Eqs per port
* (i.e eqs_per_port). Theoretically, we would like to
* write something like (i + 1) % eqs_per_port == 0.
* However, since there's an asynchronous Eq, we have
* to skip over it by comparing this condition to
* !!((i + 1) > MLX4_EQ_ASYNC).
*/
if ((dev->caps.num_comp_vectors > dev->caps.num_ports) &&
((i + 1) %
(dev->caps.num_comp_vectors / dev->caps.num_ports)) ==
!!((i + 1) > MLX4_EQ_ASYNC))
/* If dev->caps.num_comp_vectors < dev->caps.num_ports,
* everything is shared anyway.
*/
port++;
}
dev->flags |= MLX4_FLAG_MSI_X;
@ -2526,10 +2556,15 @@ static void mlx4_enable_msi_x(struct mlx4_dev *dev)
no_msi:
dev->caps.num_comp_vectors = 1;
dev->caps.comp_pool = 0;
for (i = 0; i < 2; ++i)
BUG_ON(MLX4_EQ_ASYNC >= 2);
for (i = 0; i < 2; ++i) {
priv->eq_table.eq[i].irq = dev->persist->pdev->irq;
if (i != MLX4_EQ_ASYNC) {
bitmap_fill(priv->eq_table.eq[i].actv_ports.ports,
dev->caps.num_ports);
}
}
}
static int mlx4_init_port_info(struct mlx4_dev *dev, int port)
@ -2594,6 +2629,10 @@ static void mlx4_cleanup_port_info(struct mlx4_port_info *info)
device_remove_file(&info->dev->persist->pdev->dev, &info->port_attr);
device_remove_file(&info->dev->persist->pdev->dev,
&info->port_mtu_attr);
#ifdef CONFIG_RFS_ACCEL
free_irq_cpu_rmap(info->rmap);
info->rmap = NULL;
#endif
}
static int mlx4_init_steering(struct mlx4_dev *dev)
@ -3024,7 +3063,7 @@ slave_start:
if (err)
goto err_master_mfunc;
priv->msix_ctl.pool_bm = 0;
bitmap_zero(priv->msix_ctl.pool_bm, MAX_MSIX);
mutex_init(&priv->msix_ctl.pool_lock);
mlx4_enable_msi_x(dev);
@ -3046,7 +3085,6 @@ slave_start:
!mlx4_is_mfunc(dev)) {
dev->flags &= ~MLX4_FLAG_MSI_X;
dev->caps.num_comp_vectors = 1;
dev->caps.comp_pool = 0;
pci_disable_msix(pdev);
err = mlx4_setup_hca(dev);
}

11
drivers/net/ethernet/mellanox/mlx4/mlx4.h
View File

@ -287,6 +287,12 @@ struct mlx4_icm_table {
#define MLX4_CQE_SIZE_MASK_STRIDE 0x3
#define MLX4_EQE_SIZE_MASK_STRIDE 0x30
#define MLX4_EQ_ASYNC 0
#define MLX4_EQ_TO_CQ_VECTOR(vector) ((vector) - \
!!((int)(vector) >= MLX4_EQ_ASYNC))
#define MLX4_CQ_TO_EQ_VECTOR(vector) ((vector) + \
!!((int)(vector) >= MLX4_EQ_ASYNC))
/*
* Must be packed because mtt_seg is 64 bits but only aligned to 32 bits.
*/
@ -391,6 +397,8 @@ struct mlx4_eq {
struct mlx4_buf_list *page_list;
struct mlx4_mtt mtt;
struct mlx4_eq_tasklet tasklet_ctx;
struct mlx4_active_ports actv_ports;
u32 ref_count;
};
struct mlx4_slave_eqe {
@ -808,6 +816,7 @@ struct mlx4_port_info {
struct mlx4_vlan_table vlan_table;
struct mlx4_roce_gid_table gid_table;
int base_qpn;
struct cpu_rmap *rmap;
};
struct mlx4_sense {
@ -818,7 +827,7 @@ struct mlx4_sense {
};
struct mlx4_msix_ctl {
u64 pool_bm;
DECLARE_BITMAP(pool_bm, MAX_MSIX);
struct mutex pool_lock;
};

2
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
View File

@ -338,7 +338,7 @@ struct mlx4_en_cq {
struct napi_struct napi;
int size;
int buf_size;
unsigned vector;
int vector;
enum cq_type is_tx;
u16 moder_time;
u16 moder_cnt;

11
include/linux/mlx4/device.h
View File

@ -46,8 +46,9 @@
#define MAX_MSIX_P_PORT 17
#define MAX_MSIX 64
#define MSIX_LEGACY_SZ 4
#define MIN_MSIX_P_PORT 5
#define MLX4_IS_LEGACY_EQ_MODE(dev_cap) ((dev_cap).num_comp_vectors < \
(dev_cap).num_ports * MIN_MSIX_P_PORT)
#define MLX4_MAX_100M_UNITS_VAL 255 /*
* work around: can't set values
@ -528,7 +529,6 @@ struct mlx4_caps {
int num_eqs;
int reserved_eqs;
int num_comp_vectors;
int comp_pool;
int num_mpts;
int max_fmr_maps;
int num_mtts;
@ -1332,10 +1332,13 @@ void mlx4_fmr_unmap(struct mlx4_dev *dev, struct mlx4_fmr *fmr,
int mlx4_fmr_free(struct mlx4_dev *dev, struct mlx4_fmr *fmr);
int mlx4_SYNC_TPT(struct mlx4_dev *dev);
int mlx4_test_interrupts(struct mlx4_dev *dev);
int mlx4_assign_eq(struct mlx4_dev *dev, char *name, struct cpu_rmap *rmap,
int *vector);
u32 mlx4_get_eqs_per_port(struct mlx4_dev *dev, u8 port);
bool mlx4_is_eq_vector_valid(struct mlx4_dev *dev, u8 port, int vector);
struct cpu_rmap *mlx4_get_cpu_rmap(struct mlx4_dev *dev, int port);
int mlx4_assign_eq(struct mlx4_dev *dev, u8 port, int *vector);
void mlx4_release_eq(struct mlx4_dev *dev, int vec);
int mlx4_is_eq_shared(struct mlx4_dev *dev, int vector);
int mlx4_eq_get_irq(struct mlx4_dev *dev, int vec);
int mlx4_get_phys_port_id(struct mlx4_dev *dev);