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Message-ID: <4AF19E3A.2000802@mellanox.co.il>
Date: Wed, 04 Nov 2009 17:31:06 +0200
From: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
To: rdreier@...co.com
CC: linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
liranl@...lanox.co.il, tziporet@...lanox.co.il,
yevgenyp@...lanox.co.il
Subject: [PATCH 11/25] mlx4_core: per-function capabilities
The master function builds a HW profile, and manages all resources.
Other functions query the master for function-specific capabilities.
EQs, MSI-X vectors, and UARs are statically divided among all functions,
while other resources are dynamically assigned later upon request.
Signed-off-by: Liran Liss <liranl@...lanox.co.il>
---
drivers/net/mlx4/cmd.c | 2 +
drivers/net/mlx4/fw.c | 78 +++++++++++++++++++++++++++++++++++++++++-
drivers/net/mlx4/fw.h | 4 ++
drivers/net/mlx4/main.c | 70 ++++++++++++++++++++++++++++++++++++++-
drivers/net/mlx4/mlx4.h | 4 ++-
drivers/net/mlx4/profile.c | 26 ++++++++++++--
include/linux/mlx4/cmd.h | 1 +
include/linux/mlx4/device.h | 3 ++
8 files changed, 180 insertions(+), 8 deletions(-)
diff --git a/drivers/net/mlx4/cmd.c b/drivers/net/mlx4/cmd.c
index 29074a0..7afbfef 100644
--- a/drivers/net/mlx4/cmd.c
+++ b/drivers/net/mlx4/cmd.c
@@ -39,6 +39,7 @@
#include <asm/io.h>
#include "mlx4.h"
+#include "fw.h"
#include "en_port.h"
#define CMD_POLL_TOKEN 0xffff
@@ -524,6 +525,7 @@ static struct mlx4_cmd_info {
struct mlx4_cmd_mailbox *outbox);
} cmd_info[] = {
{MLX4_CMD_QUERY_FW, 0, 1, 0, NULL, NULL},
+ {MLX4_CMD_QUERY_SLAVE_CAP, 0, 1, 0, NULL, mlx4_QUERY_SLAVE_CAP_wrapper},
{MLX4_CMD_QUERY_ADAPTER, 0, 1, 0, NULL, NULL},
{MLX4_CMD_GET_SLAVE_SQP, 0, 1, 0, NULL, mlx4_GET_SLAVE_SQP_wrapper},
diff --git a/drivers/net/mlx4/fw.c b/drivers/net/mlx4/fw.c
index 87eb2d4..60889d3 100644
--- a/drivers/net/mlx4/fw.c
+++ b/drivers/net/mlx4/fw.c
@@ -143,6 +143,76 @@ int mlx4_QUERY_PORT_wrapper(struct mlx4_dev *dev, int slave, struct mlx4_vhcr *v
MLX4_CMD_TIME_CLASS_B);
}
+int mlx4_QUERY_SLAVE_CAP_wrapper(struct mlx4_dev *dev, int slave, struct mlx4_vhcr *vhcr,
+ struct mlx4_cmd_mailbox *inbox,
+ struct mlx4_cmd_mailbox *outbox)
+{
+ struct mlx4_caps *caps = outbox->buf;
+ int i;
+
+ memcpy(caps, &dev->caps, sizeof *caps);
+
+ /* CX1: blue-flame not supported in vfs */
+ caps->bf_reg_size = 0;
+ caps->bf_regs_per_page = 0;
+
+ /* CX1:
+ * On ingress, slave0 gets full ownership over qp1, and demultiplexes GSI mads
+ * on behalf of other slaves.
+ * On egress, slave>0 must tunnel their GSI mads for validation by the qp1 owner */
+ if (slave) {
+ caps->sqp_demux = 0;
+ for (i = 1; i <= dev->caps.num_ports; ++i) {
+ caps->gid_table_len[i] = 1;
+ caps->pkey_table_len[i] = 1;
+ }
+ } else {
+ caps->sqp_demux = dev->num_slaves;
+ for (i = 1; i <= dev->caps.num_ports; ++i) {
+ caps->gid_table_len[i] = dev->num_slaves;
+ caps->pkey_table_len[i] = 1;
+ }
+ }
+
+ /* Slave functions allocate themselves EQs, UARs, and PDs.
+ * - num is the maximum resource index
+ * - reserved is the minimum resource index */
+ caps->num_eqs = dev->caps.reserved_eqs + MLX4_MFUNC_EQ_NUM * (slave + 2);
+ caps->reserved_eqs = dev->caps.reserved_eqs + MLX4_MFUNC_EQ_NUM * (slave + 1);
+ caps->num_uars = dev->caps.num_uars * (slave + 1);
+ caps->reserved_uars = max_t(int, dev->caps.num_uars * slave, dev->caps.reserved_uars);
+
+ /* PDs have the same range in every guest; the distinction is in the msbs,
+ * which contains the guest ID (vf + 1) */
+ caps->pd_base = slave + 1;
+
+ /* All other resources are allocated by the master, but we still report
+ * 'num' and 'reserved' capabilities as follows:
+ * - num remains the maximum resource index
+ * - 'num - reserved' is the total available objects of a resource, but
+ * resource indices may be less than 'reserved'
+ * TODO: set per-resource quotas */
+ return 0;
+}
+
+int mlx4_QUERY_SLAVE_CAP(struct mlx4_dev *dev, struct mlx4_caps *caps)
+{
+ struct mlx4_cmd_mailbox *mailbox;
+ int err;
+
+ mailbox = mlx4_alloc_cmd_mailbox(dev);
+ if (IS_ERR(mailbox))
+ return PTR_ERR(mailbox);
+
+ err = mlx4_cmd_box(dev, 0, mailbox->dma, 0, 0, MLX4_CMD_QUERY_SLAVE_CAP,
+ MLX4_CMD_TIME_CLASS_A);
+ if (!err)
+ memcpy(caps, mailbox->buf, sizeof *caps);
+
+ mlx4_free_cmd_mailbox(dev, mailbox);
+ return err;
+}
+
int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
{
struct mlx4_cmd_mailbox *mailbox;
@@ -405,9 +475,13 @@ int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
* Each UAR has 4 EQ doorbells; so if a UAR is reserved, then
* we can't use any EQs whose doorbell falls on that page,
* even if the EQ itself isn't reserved.
+ * CX1: in multi-function mode, EQ doorbells are virtualized so the whole EQ
+ * range is available: the master and each of the slaves get 4 EQ doorbells
+ * starting from the first non-reserved EQ.
*/
- dev_cap->reserved_eqs = max(dev_cap->reserved_uars * 4,
- dev_cap->reserved_eqs);
+ if (!mlx4_is_mfunc(dev))
+ dev_cap->reserved_eqs = max(dev_cap->reserved_uars * 4,
+ dev_cap->reserved_eqs);
mlx4_dbg(dev, "Max ICM size %lld MB\n",
(unsigned long long) dev_cap->max_icm_sz >> 20);
diff --git a/drivers/net/mlx4/fw.h b/drivers/net/mlx4/fw.h
index 526d7f3..d066c69 100644
--- a/drivers/net/mlx4/fw.h
+++ b/drivers/net/mlx4/fw.h
@@ -160,6 +160,10 @@ struct mlx4_set_ib_param {
};
int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap);
+int mlx4_QUERY_SLAVE_CAP(struct mlx4_dev *dev, struct mlx4_caps *caps);
+int mlx4_QUERY_SLAVE_CAP_wrapper(struct mlx4_dev *dev, int slave, struct mlx4_vhcr *vhcr,
+ struct mlx4_cmd_mailbox *inbox,
+ struct mlx4_cmd_mailbox *outbox);
int mlx4_MAP_FA(struct mlx4_dev *dev, struct mlx4_icm *icm);
int mlx4_UNMAP_FA(struct mlx4_dev *dev);
int mlx4_RUN_FW(struct mlx4_dev *dev);
diff --git a/drivers/net/mlx4/main.c b/drivers/net/mlx4/main.c
index 291a505..4edc8d7 100644
--- a/drivers/net/mlx4/main.c
+++ b/drivers/net/mlx4/main.c
@@ -141,6 +141,7 @@ static void mlx4_set_port_mask(struct mlx4_dev *dev)
if (dev->caps.port_type[i] == MLX4_PORT_TYPE_IB)
dev->caps.port_mask |= 1 << (i - 1);
}
+
static int mlx4_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
{
int err;
@@ -185,6 +186,7 @@ static int mlx4_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
dev->caps.supported_type[i] = dev_cap->supported_port_types[i];
}
+ dev->caps.uar_page_size = PAGE_SIZE;
dev->caps.num_uars = dev_cap->uar_size / PAGE_SIZE;
dev->caps.local_ca_ack_delay = dev_cap->local_ca_ack_delay;
dev->caps.bf_reg_size = dev_cap->bf_reg_size;
@@ -211,7 +213,9 @@ static int mlx4_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
dev->caps.reserved_mtts = DIV_ROUND_UP(dev_cap->reserved_mtts,
dev->caps.mtts_per_seg);
dev->caps.reserved_mrws = dev_cap->reserved_mrws;
- dev->caps.reserved_uars = dev_cap->reserved_uars;
+
+ /* The first 128 UARs are used for EQ doorbells */
+ dev->caps.reserved_uars = max_t(int, 128, dev_cap->reserved_uars);
dev->caps.reserved_pds = dev_cap->reserved_pds;
dev->caps.mtt_entry_sz = dev->caps.mtts_per_seg * dev_cap->mtt_entry_sz;
dev->caps.max_msg_sz = dev_cap->max_msg_sz;
@@ -265,6 +269,70 @@ static int mlx4_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FC_ADDR] +
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FC_EXCH];
+ /* CX1: vf0 takes role of GSI multiplexing instead of master */
+ dev->caps.sqp_demux = 0;
+ return 0;
+}
+
+static int mlx4_slave_cap(struct mlx4_dev *dev)
+{
+ int err;
+ u32 page_size;
+
+ err = mlx4_QUERY_SLAVE_CAP(dev, &dev->caps);
+ if (err)
+ return err;
+
+ page_size = ~dev->caps.page_size_cap + 1;
+ mlx4_warn(dev, "HCA minimum page size:%d\n", page_size);
+ if (page_size > PAGE_SIZE) {
+ mlx4_err(dev, "HCA minimum page size of %d bigger than "
+ "kernel PAGE_SIZE of %ld, aborting.\n",
+ page_size, PAGE_SIZE);
+ return -ENODEV;
+ }
+
+ /* TODO: relax this assumption */
+ if (dev->caps.uar_page_size != PAGE_SIZE) {
+ mlx4_err(dev, "UAR size:%d != kernel PAGE_SIZE of %ld\n",
+ dev->caps.uar_page_size, PAGE_SIZE);
+ return -ENODEV;
+ }
+
+ if (dev->caps.num_ports > MLX4_MAX_PORTS) {
+ mlx4_err(dev, "HCA has %d ports, but we only support %d, "
+ "aborting.\n", dev->caps.num_ports, MLX4_MAX_PORTS);
+ return -ENODEV;
+ }
+
+ if (dev->caps.uar_page_size * (dev->caps.num_uars -
+ dev->caps.reserved_uars) >
+ pci_resource_len(dev->pdev, 2)) {
+ mlx4_err(dev, "HCA reported UAR region size of 0x%x bigger than "
+ "PCI resource 2 size of 0x%llx, aborting.\n",
+ dev->caps.uar_page_size * dev->caps.num_uars,
+ (unsigned long long) pci_resource_len(dev->pdev, 2));
+ return -ENODEV;
+ }
+
+ /* Adjust eq number */
+ if (dev->caps.num_eqs - dev->caps.reserved_eqs > num_possible_cpus() + 1)
+ dev->caps.num_eqs = dev->caps.reserved_eqs + num_possible_cpus() + 1;
+
+#if 0
+ mlx4_warn(dev, "sqp_demux:%d\n", dev->caps.sqp_demux);
+ mlx4_warn(dev, "num_uars:%d reserved_uars:%d uar region:0x%x bar2:0x%llx\n",
+ dev->caps.num_uars, dev->caps.reserved_uars,
+ dev->caps.uar_page_size * dev->caps.num_uars,
+ pci_resource_len(dev->pdev, 2));
+ mlx4_warn(dev, "num_eqs:%d reserved_eqs:%d\n", dev->caps.num_eqs,
+ dev->caps.reserved_eqs);
+ mlx4_warn(dev, "num_pds:%d reserved_pds:%d slave_pd_shift:%d pd_base:%d\n",
+ dev->caps.num_pds,
+ dev->caps.reserved_pds,
+ dev->caps.slave_pd_shift,
+ dev->caps.pd_base);
+#endif
return 0;
}
diff --git a/drivers/net/mlx4/mlx4.h b/drivers/net/mlx4/mlx4.h
index b01820f..b8b30ca 100644
--- a/drivers/net/mlx4/mlx4.h
+++ b/drivers/net/mlx4/mlx4.h
@@ -69,7 +69,8 @@ enum {
};
enum {
- MLX4_NUM_PDS = 1 << 15
+ MLX4_NUM_PDS = 1 << 15,
+ MLX4_SLAVE_PD_SHIFT = 17, /* the 7 msbs encode the slave id */
};
enum {
@@ -112,6 +113,7 @@ enum mlx4_alloc_mode {
enum {
MLX4_MFUNC_MAX = 64,
+ MLX4_MFUNC_EQ_NUM = 4,
MLX4_MFUNC_MAX_EQES = 8,
MLX4_MFUNC_EQE_MASK = (MLX4_MFUNC_MAX_EQES - 1)
};
diff --git a/drivers/net/mlx4/profile.c b/drivers/net/mlx4/profile.c
index ca25b9d..f6197e9 100644
--- a/drivers/net/mlx4/profile.c
+++ b/drivers/net/mlx4/profile.c
@@ -105,9 +105,19 @@ 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,
- dev_cap->reserved_eqs +
- num_possible_cpus() + 1);
+ if (mlx4_is_master(dev)) {
+ profile[MLX4_RES_EQ].num = dev_cap->reserved_eqs +
+ MLX4_MFUNC_EQ_NUM *
+ (dev->num_slaves + 1);
+ if (profile[MLX4_RES_EQ].num > dev_cap->max_eqs) {
+ mlx4_warn(dev, "Not enough eqs for:%ld slave functions\n", dev->num_slaves);
+ kfree(profile);
+ return -ENOMEM;
+ }
+ } else
+ profile[MLX4_RES_EQ].num = min_t(unsigned, dev_cap->max_eqs,
+ dev_cap->reserved_eqs +
+ num_possible_cpus() + 1);
profile[MLX4_RES_DMPT].num = request->num_mpt;
profile[MLX4_RES_CMPT].num = MLX4_NUM_CMPTS;
profile[MLX4_RES_MTT].num = request->num_mtt;
@@ -196,7 +206,13 @@ 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;
+ if (mlx4_is_master(dev)) {
+ dev->caps.num_eqs = dev_cap->reserved_eqs +
+ min_t(unsigned,
+ MLX4_MFUNC_EQ_NUM,
+ num_possible_cpus() + 1);
+ } else
+ dev->caps.num_eqs = profile[i].num;
init_hca->eqc_base = profile[i].start;
init_hca->log_num_eqs = profile[i].log_num;
break;
@@ -232,6 +248,8 @@ u64 mlx4_make_profile(struct mlx4_dev *dev,
* of the HCA profile anyway.
*/
dev->caps.num_pds = MLX4_NUM_PDS;
+ dev->caps.slave_pd_shift = MLX4_SLAVE_PD_SHIFT;
+ dev->caps.pd_base = 0;
kfree(profile);
return total_size;
diff --git a/include/linux/mlx4/cmd.h b/include/linux/mlx4/cmd.h
index f1659f2..f265091 100644
--- a/include/linux/mlx4/cmd.h
+++ b/include/linux/mlx4/cmd.h
@@ -123,6 +123,7 @@ enum {
MLX4_CMD_ALLOC_RES = 0x50,
MLX4_CMD_FREE_RES = 0x51,
MLX4_CMD_GET_EVENT = 0x52,
+ MLX4_CMD_QUERY_SLAVE_CAP = 0x53,
MLX4_CMD_MCAST_ATTACH = 0x54,
MLX4_CMD_GET_SLAVE_SQP = 0x55,
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index b20c8d8..4b9091a 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -192,6 +192,7 @@ struct mlx4_caps {
int pkey_table_len[MLX4_MAX_PORTS + 1];
int local_ca_ack_delay;
int num_uars;
+ int uar_page_size;
int bf_reg_size;
int bf_regs_per_page;
int max_sq_sg;
@@ -226,6 +227,8 @@ struct mlx4_caps {
int num_qp_per_mgm;
int num_pds;
int reserved_pds;
+ int slave_pd_shift;
+ int pd_base;
int mtt_entry_sz;
u32 max_msg_sz;
u32 page_size_cap;
--
1.6.1.3
--
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