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linux/drivers/infiniband/hw/mthca/mthca_eq.c
Ishai Rabinovitz 8d3ef29d6b IB/mthca: Use an enum for HCA page size 
Use a named enum for the HCA's internal page size, rather than having
magic values of 4096 and shifts by 12 all over the code.  Also, fix
one minor bug in EQ handling: only one HCA page is mapped to the HCA
during initialization, but a full kernel page is unmapped during
cleanup.  This might cause problems when PAGE_SIZE != 4096.

Signed-off-by: Ishai Rabinovitz <ishai@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-03-20 10:08:19 -08:00

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/*
* Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* $Id: mthca_eq.c 1382 2004-12-24 02:21:02Z roland $
*/
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include "mthca_dev.h"
#include "mthca_cmd.h"
#include "mthca_config_reg.h"
enum {
MTHCA_NUM_ASYNC_EQE = 0x80,
MTHCA_NUM_CMD_EQE = 0x80,
MTHCA_NUM_SPARE_EQE = 0x80,
MTHCA_EQ_ENTRY_SIZE = 0x20
};
/*
* Must be packed because start is 64 bits but only aligned to 32 bits.
*/
struct mthca_eq_context {
__be32 flags;
__be64 start;
__be32 logsize_usrpage;
__be32 tavor_pd; /* reserved for Arbel */
u8 reserved1[3];
u8 intr;
__be32 arbel_pd; /* lost_count for Tavor */
__be32 lkey;
u32 reserved2[2];
__be32 consumer_index;
__be32 producer_index;
u32 reserved3[4];
} __attribute__((packed));
#define MTHCA_EQ_STATUS_OK ( 0 << 28)
#define MTHCA_EQ_STATUS_OVERFLOW ( 9 << 28)
#define MTHCA_EQ_STATUS_WRITE_FAIL (10 << 28)
#define MTHCA_EQ_OWNER_SW ( 0 << 24)
#define MTHCA_EQ_OWNER_HW ( 1 << 24)
#define MTHCA_EQ_FLAG_TR ( 1 << 18)
#define MTHCA_EQ_FLAG_OI ( 1 << 17)
#define MTHCA_EQ_STATE_ARMED ( 1 << 8)
#define MTHCA_EQ_STATE_FIRED ( 2 << 8)
#define MTHCA_EQ_STATE_ALWAYS_ARMED ( 3 << 8)
#define MTHCA_EQ_STATE_ARBEL ( 8 << 8)
enum {
MTHCA_EVENT_TYPE_COMP = 0x00,
MTHCA_EVENT_TYPE_PATH_MIG = 0x01,
MTHCA_EVENT_TYPE_COMM_EST = 0x02,
MTHCA_EVENT_TYPE_SQ_DRAINED = 0x03,
MTHCA_EVENT_TYPE_SRQ_QP_LAST_WQE = 0x13,
MTHCA_EVENT_TYPE_SRQ_LIMIT = 0x14,
MTHCA_EVENT_TYPE_CQ_ERROR = 0x04,
MTHCA_EVENT_TYPE_WQ_CATAS_ERROR = 0x05,
MTHCA_EVENT_TYPE_EEC_CATAS_ERROR = 0x06,
MTHCA_EVENT_TYPE_PATH_MIG_FAILED = 0x07,
MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR = 0x10,
MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR = 0x11,
MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR = 0x12,
MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR = 0x08,
MTHCA_EVENT_TYPE_PORT_CHANGE = 0x09,
MTHCA_EVENT_TYPE_EQ_OVERFLOW = 0x0f,
MTHCA_EVENT_TYPE_ECC_DETECT = 0x0e,
MTHCA_EVENT_TYPE_CMD = 0x0a
};
#define MTHCA_ASYNC_EVENT_MASK ((1ULL << MTHCA_EVENT_TYPE_PATH_MIG) | \
(1ULL << MTHCA_EVENT_TYPE_COMM_EST) | \
(1ULL << MTHCA_EVENT_TYPE_SQ_DRAINED) | \
(1ULL << MTHCA_EVENT_TYPE_CQ_ERROR) | \
(1ULL << MTHCA_EVENT_TYPE_WQ_CATAS_ERROR) | \
(1ULL << MTHCA_EVENT_TYPE_EEC_CATAS_ERROR) | \
(1ULL << MTHCA_EVENT_TYPE_PATH_MIG_FAILED) | \
(1ULL << MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR) | \
(1ULL << MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR) | \
(1ULL << MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR) | \
(1ULL << MTHCA_EVENT_TYPE_PORT_CHANGE) | \
(1ULL << MTHCA_EVENT_TYPE_ECC_DETECT))
#define MTHCA_SRQ_EVENT_MASK ((1ULL << MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR) | \
(1ULL << MTHCA_EVENT_TYPE_SRQ_QP_LAST_WQE) | \
(1ULL << MTHCA_EVENT_TYPE_SRQ_LIMIT))
#define MTHCA_CMD_EVENT_MASK (1ULL << MTHCA_EVENT_TYPE_CMD)
#define MTHCA_EQ_DB_INC_CI (1 << 24)
#define MTHCA_EQ_DB_REQ_NOT (2 << 24)
#define MTHCA_EQ_DB_DISARM_CQ (3 << 24)
#define MTHCA_EQ_DB_SET_CI (4 << 24)
#define MTHCA_EQ_DB_ALWAYS_ARM (5 << 24)
struct mthca_eqe {
u8 reserved1;
u8 type;
u8 reserved2;
u8 subtype;
union {
u32 raw[6];
struct {
__be32 cqn;
} __attribute__((packed)) comp;
struct {
u16 reserved1;
__be16 token;
u32 reserved2;
u8 reserved3[3];
u8 status;
__be64 out_param;
} __attribute__((packed)) cmd;
struct {
__be32 qpn;
} __attribute__((packed)) qp;
struct {
__be32 srqn;
} __attribute__((packed)) srq;
struct {
__be32 cqn;
u32 reserved1;
u8 reserved2[3];
u8 syndrome;
} __attribute__((packed)) cq_err;
struct {
u32 reserved1[2];
__be32 port;
} __attribute__((packed)) port_change;
} event;
u8 reserved3[3];
u8 owner;
} __attribute__((packed));
#define MTHCA_EQ_ENTRY_OWNER_SW (0 << 7)
#define MTHCA_EQ_ENTRY_OWNER_HW (1 << 7)
static inline u64 async_mask(struct mthca_dev *dev)
{
return dev->mthca_flags & MTHCA_FLAG_SRQ ?
MTHCA_ASYNC_EVENT_MASK | MTHCA_SRQ_EVENT_MASK :
MTHCA_ASYNC_EVENT_MASK;
}
static inline void tavor_set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci)
{
__be32 doorbell[2];
doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_SET_CI | eq->eqn);
doorbell[1] = cpu_to_be32(ci & (eq->nent - 1));
/*
* This barrier makes sure that all updates to ownership bits
* done by set_eqe_hw() hit memory before the consumer index
* is updated. set_eq_ci() allows the HCA to possibly write
* more EQ entries, and we want to avoid the exceedingly
* unlikely possibility of the HCA writing an entry and then
* having set_eqe_hw() overwrite the owner field.
*/
wmb();
mthca_write64(doorbell,
dev->kar + MTHCA_EQ_DOORBELL,
MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
}
static inline void arbel_set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci)
{
/* See comment in tavor_set_eq_ci() above. */
wmb();
__raw_writel((__force u32) cpu_to_be32(ci),
dev->eq_regs.arbel.eq_set_ci_base + eq->eqn * 8);
/* We still want ordering, just not swabbing, so add a barrier */
mb();
}
static inline void set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci)
{
if (mthca_is_memfree(dev))
arbel_set_eq_ci(dev, eq, ci);
else
tavor_set_eq_ci(dev, eq, ci);
}
static inline void tavor_eq_req_not(struct mthca_dev *dev, int eqn)
{
__be32 doorbell[2];
doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_REQ_NOT | eqn);
doorbell[1] = 0;
mthca_write64(doorbell,
dev->kar + MTHCA_EQ_DOORBELL,
MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
}
static inline void arbel_eq_req_not(struct mthca_dev *dev, u32 eqn_mask)
{
writel(eqn_mask, dev->eq_regs.arbel.eq_arm);
}
static inline void disarm_cq(struct mthca_dev *dev, int eqn, int cqn)
{
if (!mthca_is_memfree(dev)) {
__be32 doorbell[2];
doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_DISARM_CQ | eqn);
doorbell[1] = cpu_to_be32(cqn);
mthca_write64(doorbell,
dev->kar + MTHCA_EQ_DOORBELL,
MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
}
}
static inline struct mthca_eqe *get_eqe(struct mthca_eq *eq, u32 entry)
{
unsigned long off = (entry & (eq->nent - 1)) * MTHCA_EQ_ENTRY_SIZE;
return eq->page_list[off / PAGE_SIZE].buf + off % PAGE_SIZE;
}
static inline struct mthca_eqe* next_eqe_sw(struct mthca_eq *eq)
{
struct mthca_eqe* eqe;
eqe = get_eqe(eq, eq->cons_index);
return (MTHCA_EQ_ENTRY_OWNER_HW & eqe->owner) ? NULL : eqe;
}
static inline void set_eqe_hw(struct mthca_eqe *eqe)
{
eqe->owner = MTHCA_EQ_ENTRY_OWNER_HW;
}
static void port_change(struct mthca_dev *dev, int port, int active)
{
struct ib_event record;
mthca_dbg(dev, "Port change to %s for port %d\n",
active ? "active" : "down", port);
record.device = &dev->ib_dev;
record.event = active ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
record.element.port_num = port;
ib_dispatch_event(&record);
}
static int mthca_eq_int(struct mthca_dev *dev, struct mthca_eq *eq)
{
struct mthca_eqe *eqe;
int disarm_cqn;
int eqes_found = 0;
int set_ci = 0;
while ((eqe = next_eqe_sw(eq))) {
/*
* Make sure we read EQ entry contents after we've
* checked the ownership bit.
*/
rmb();
switch (eqe->type) {
case MTHCA_EVENT_TYPE_COMP:
disarm_cqn = be32_to_cpu(eqe->event.comp.cqn) & 0xffffff;
disarm_cq(dev, eq->eqn, disarm_cqn);
mthca_cq_completion(dev, disarm_cqn);
break;
case MTHCA_EVENT_TYPE_PATH_MIG:
mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
IB_EVENT_PATH_MIG);
break;
case MTHCA_EVENT_TYPE_COMM_EST:
mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
IB_EVENT_COMM_EST);
break;
case MTHCA_EVENT_TYPE_SQ_DRAINED:
mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
IB_EVENT_SQ_DRAINED);
break;
case MTHCA_EVENT_TYPE_SRQ_QP_LAST_WQE:
mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
IB_EVENT_QP_LAST_WQE_REACHED);
break;
case MTHCA_EVENT_TYPE_SRQ_LIMIT:
mthca_srq_event(dev, be32_to_cpu(eqe->event.srq.srqn) & 0xffffff,
IB_EVENT_SRQ_LIMIT_REACHED);
break;
case MTHCA_EVENT_TYPE_WQ_CATAS_ERROR:
mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
IB_EVENT_QP_FATAL);
break;
case MTHCA_EVENT_TYPE_PATH_MIG_FAILED:
mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
IB_EVENT_PATH_MIG_ERR);
break;
case MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
IB_EVENT_QP_REQ_ERR);
break;
case MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR:
mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
IB_EVENT_QP_ACCESS_ERR);
break;
case MTHCA_EVENT_TYPE_CMD:
mthca_cmd_event(dev,
be16_to_cpu(eqe->event.cmd.token),
eqe->event.cmd.status,
be64_to_cpu(eqe->event.cmd.out_param));
break;
case MTHCA_EVENT_TYPE_PORT_CHANGE:
port_change(dev,
(be32_to_cpu(eqe->event.port_change.port) >> 28) & 3,
eqe->subtype == 0x4);
break;
case MTHCA_EVENT_TYPE_CQ_ERROR:
mthca_warn(dev, "CQ %s on CQN %06x\n",
eqe->event.cq_err.syndrome == 1 ?
"overrun" : "access violation",
be32_to_cpu(eqe->event.cq_err.cqn) & 0xffffff);
mthca_cq_event(dev, be32_to_cpu(eqe->event.cq_err.cqn),
IB_EVENT_CQ_ERR);
break;
case MTHCA_EVENT_TYPE_EQ_OVERFLOW:
mthca_warn(dev, "EQ overrun on EQN %d\n", eq->eqn);
break;
case MTHCA_EVENT_TYPE_EEC_CATAS_ERROR:
case MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR:
case MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR:
case MTHCA_EVENT_TYPE_ECC_DETECT:
default:
mthca_warn(dev, "Unhandled event %02x(%02x) on EQ %d\n",
eqe->type, eqe->subtype, eq->eqn);
break;
};
set_eqe_hw(eqe);
++eq->cons_index;
eqes_found = 1;
++set_ci;
/*
* The HCA will think the queue has overflowed if we
* don't tell it we've been processing events. We
* create our EQs with MTHCA_NUM_SPARE_EQE extra
* entries, so we must update our consumer index at
* least that often.
*/
if (unlikely(set_ci >= MTHCA_NUM_SPARE_EQE)) {
/*
* Conditional on hca_type is OK here because
* this is a rare case, not the fast path.
*/
set_eq_ci(dev, eq, eq->cons_index);
set_ci = 0;
}
}
/*
* Rely on caller to set consumer index so that we don't have
* to test hca_type in our interrupt handling fast path.
*/
return eqes_found;
}
static irqreturn_t mthca_tavor_interrupt(int irq, void *dev_ptr, struct pt_regs *regs)
{
struct mthca_dev *dev = dev_ptr;
u32 ecr;
int i;
if (dev->eq_table.clr_mask)
writel(dev->eq_table.clr_mask, dev->eq_table.clr_int);
ecr = readl(dev->eq_regs.tavor.ecr_base + 4);
if (!ecr)
return IRQ_NONE;
writel(ecr, dev->eq_regs.tavor.ecr_base +
MTHCA_ECR_CLR_BASE - MTHCA_ECR_BASE + 4);
for (i = 0; i < MTHCA_NUM_EQ; ++i)
if (ecr & dev->eq_table.eq[i].eqn_mask) {
if (mthca_eq_int(dev, &dev->eq_table.eq[i]))
tavor_set_eq_ci(dev, &dev->eq_table.eq[i],
dev->eq_table.eq[i].cons_index);
tavor_eq_req_not(dev, dev->eq_table.eq[i].eqn);
}
return IRQ_HANDLED;
}
static irqreturn_t mthca_tavor_msi_x_interrupt(int irq, void *eq_ptr,
struct pt_regs *regs)
{
struct mthca_eq *eq = eq_ptr;
struct mthca_dev *dev = eq->dev;
mthca_eq_int(dev, eq);
tavor_set_eq_ci(dev, eq, eq->cons_index);
tavor_eq_req_not(dev, eq->eqn);
/* MSI-X vectors always belong to us */
return IRQ_HANDLED;
}
static irqreturn_t mthca_arbel_interrupt(int irq, void *dev_ptr, struct pt_regs *regs)
{
struct mthca_dev *dev = dev_ptr;
int work = 0;
int i;
if (dev->eq_table.clr_mask)
writel(dev->eq_table.clr_mask, dev->eq_table.clr_int);
for (i = 0; i < MTHCA_NUM_EQ; ++i)
if (mthca_eq_int(dev, &dev->eq_table.eq[i])) {
work = 1;
arbel_set_eq_ci(dev, &dev->eq_table.eq[i],
dev->eq_table.eq[i].cons_index);
}
arbel_eq_req_not(dev, dev->eq_table.arm_mask);
return IRQ_RETVAL(work);
}
static irqreturn_t mthca_arbel_msi_x_interrupt(int irq, void *eq_ptr,
struct pt_regs *regs)
{
struct mthca_eq *eq = eq_ptr;
struct mthca_dev *dev = eq->dev;
mthca_eq_int(dev, eq);
arbel_set_eq_ci(dev, eq, eq->cons_index);
arbel_eq_req_not(dev, eq->eqn_mask);
/* MSI-X vectors always belong to us */
return IRQ_HANDLED;
}
static int __devinit mthca_create_eq(struct mthca_dev *dev,
int nent,
u8 intr,
struct mthca_eq *eq)
{
int npages;
u64 *dma_list = NULL;
dma_addr_t t;
struct mthca_mailbox *mailbox;
struct mthca_eq_context *eq_context;
int err = -ENOMEM;
int i;
u8 status;
eq->dev = dev;
eq->nent = roundup_pow_of_two(max(nent, 2));
npages = ALIGN(eq->nent * MTHCA_EQ_ENTRY_SIZE, PAGE_SIZE) / PAGE_SIZE;
eq->page_list = kmalloc(npages * sizeof *eq->page_list,
GFP_KERNEL);
if (!eq->page_list)
goto err_out;
for (i = 0; i < npages; ++i)
eq->page_list[i].buf = NULL;
dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL);
if (!dma_list)
goto err_out_free;
mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
if (IS_ERR(mailbox))
goto err_out_free;
eq_context = mailbox->buf;
for (i = 0; i < npages; ++i) {
eq->page_list[i].buf = dma_alloc_coherent(&dev->pdev->dev,
PAGE_SIZE, &t, GFP_KERNEL);
if (!eq->page_list[i].buf)
goto err_out_free_pages;
dma_list[i] = t;
pci_unmap_addr_set(&eq->page_list[i], mapping, t);
memset(eq->page_list[i].buf, 0, PAGE_SIZE);
}
for (i = 0; i < eq->nent; ++i)
set_eqe_hw(get_eqe(eq, i));
eq->eqn = mthca_alloc(&dev->eq_table.alloc);
if (eq->eqn == -1)
goto err_out_free_pages;
err = mthca_mr_alloc_phys(dev, dev->driver_pd.pd_num,
dma_list, PAGE_SHIFT, npages,
0, npages * PAGE_SIZE,
MTHCA_MPT_FLAG_LOCAL_WRITE |
MTHCA_MPT_FLAG_LOCAL_READ,
&eq->mr);
if (err)
goto err_out_free_eq;
memset(eq_context, 0, sizeof *eq_context);
eq_context->flags = cpu_to_be32(MTHCA_EQ_STATUS_OK |
MTHCA_EQ_OWNER_HW |
MTHCA_EQ_STATE_ARMED |
MTHCA_EQ_FLAG_TR);
if (mthca_is_memfree(dev))
eq_context->flags |= cpu_to_be32(MTHCA_EQ_STATE_ARBEL);
eq_context->logsize_usrpage = cpu_to_be32((ffs(eq->nent) - 1) << 24);
if (mthca_is_memfree(dev)) {
eq_context->arbel_pd = cpu_to_be32(dev->driver_pd.pd_num);
} else {
eq_context->logsize_usrpage |= cpu_to_be32(dev->driver_uar.index);
eq_context->tavor_pd = cpu_to_be32(dev->driver_pd.pd_num);
}
eq_context->intr = intr;
eq_context->lkey = cpu_to_be32(eq->mr.ibmr.lkey);
err = mthca_SW2HW_EQ(dev, mailbox, eq->eqn, &status);
if (err) {
mthca_warn(dev, "SW2HW_EQ failed (%d)\n", err);
goto err_out_free_mr;
}
if (status) {
mthca_warn(dev, "SW2HW_EQ returned status 0x%02x\n",
status);
err = -EINVAL;
goto err_out_free_mr;
}
kfree(dma_list);
mthca_free_mailbox(dev, mailbox);
eq->eqn_mask = swab32(1 << eq->eqn);
eq->cons_index = 0;
dev->eq_table.arm_mask |= eq->eqn_mask;
mthca_dbg(dev, "Allocated EQ %d with %d entries\n",
eq->eqn, eq->nent);
return err;
err_out_free_mr:
mthca_free_mr(dev, &eq->mr);
err_out_free_eq:
mthca_free(&dev->eq_table.alloc, eq->eqn);
err_out_free_pages:
for (i = 0; i < npages; ++i)
if (eq->page_list[i].buf)
dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
eq->page_list[i].buf,
pci_unmap_addr(&eq->page_list[i],
mapping));
mthca_free_mailbox(dev, mailbox);
err_out_free:
kfree(eq->page_list);
kfree(dma_list);
err_out:
return err;
}
static void mthca_free_eq(struct mthca_dev *dev,
struct mthca_eq *eq)
{
struct mthca_mailbox *mailbox;
int err;
u8 status;
int npages = (eq->nent * MTHCA_EQ_ENTRY_SIZE + PAGE_SIZE - 1) /
PAGE_SIZE;
int i;
mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
if (IS_ERR(mailbox))
return;
err = mthca_HW2SW_EQ(dev, mailbox, eq->eqn, &status);
if (err)
mthca_warn(dev, "HW2SW_EQ failed (%d)\n", err);
if (status)
mthca_warn(dev, "HW2SW_EQ returned status 0x%02x\n", status);
dev->eq_table.arm_mask &= ~eq->eqn_mask;
if (0) {
mthca_dbg(dev, "Dumping EQ context %02x:\n", eq->eqn);
for (i = 0; i < sizeof (struct mthca_eq_context) / 4; ++i) {
if (i % 4 == 0)
printk("[%02x] ", i * 4);
printk(" %08x", be32_to_cpup(mailbox->buf + i * 4));
if ((i + 1) % 4 == 0)
printk("\n");
}
}
mthca_free_mr(dev, &eq->mr);
for (i = 0; i < npages; ++i)
pci_free_consistent(dev->pdev, PAGE_SIZE,
eq->page_list[i].buf,
pci_unmap_addr(&eq->page_list[i], mapping));
kfree(eq->page_list);
mthca_free_mailbox(dev, mailbox);
}
static void mthca_free_irqs(struct mthca_dev *dev)
{
int i;
if (dev->eq_table.have_irq)
free_irq(dev->pdev->irq, dev);
for (i = 0; i < MTHCA_NUM_EQ; ++i)
if (dev->eq_table.eq[i].have_irq)
free_irq(dev->eq_table.eq[i].msi_x_vector,
dev->eq_table.eq + i);
}
static int __devinit mthca_map_reg(struct mthca_dev *dev,
unsigned long offset, unsigned long size,
void __iomem **map)
{
unsigned long base = pci_resource_start(dev->pdev, 0);
if (!request_mem_region(base + offset, size, DRV_NAME))
return -EBUSY;
*map = ioremap(base + offset, size);
if (!*map) {
release_mem_region(base + offset, size);
return -ENOMEM;
}
return 0;
}
static void mthca_unmap_reg(struct mthca_dev *dev, unsigned long offset,
unsigned long size, void __iomem *map)
{
unsigned long base = pci_resource_start(dev->pdev, 0);
release_mem_region(base + offset, size);
iounmap(map);
}
static int __devinit mthca_map_eq_regs(struct mthca_dev *dev)
{
unsigned long mthca_base;
mthca_base = pci_resource_start(dev->pdev, 0);
if (mthca_is_memfree(dev)) {
/*
* We assume that the EQ arm and EQ set CI registers
* fall within the first BAR. We can't trust the
* values firmware gives us, since those addresses are
* valid on the HCA's side of the PCI bus but not
* necessarily the host side.
*/
if (mthca_map_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
&dev->clr_base)) {
mthca_err(dev, "Couldn't map interrupt clear register, "
"aborting.\n");
return -ENOMEM;
}
/*
* Add 4 because we limit ourselves to EQs 0 ... 31,
* so we only need the low word of the register.
*/
if (mthca_map_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) &
dev->fw.arbel.eq_arm_base) + 4, 4,
&dev->eq_regs.arbel.eq_arm)) {
mthca_err(dev, "Couldn't map EQ arm register, aborting.\n");
mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
dev->clr_base);
return -ENOMEM;
}
if (mthca_map_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
dev->fw.arbel.eq_set_ci_base,
MTHCA_EQ_SET_CI_SIZE,
&dev->eq_regs.arbel.eq_set_ci_base)) {
mthca_err(dev, "Couldn't map EQ CI register, aborting.\n");
mthca_unmap_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) &
dev->fw.arbel.eq_arm_base) + 4, 4,
dev->eq_regs.arbel.eq_arm);
mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
dev->clr_base);
return -ENOMEM;
}
} else {
if (mthca_map_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE,
&dev->clr_base)) {
mthca_err(dev, "Couldn't map interrupt clear register, "
"aborting.\n");
return -ENOMEM;
}
if (mthca_map_reg(dev, MTHCA_ECR_BASE,
MTHCA_ECR_SIZE + MTHCA_ECR_CLR_SIZE,
&dev->eq_regs.tavor.ecr_base)) {
mthca_err(dev, "Couldn't map ecr register, "
"aborting.\n");
mthca_unmap_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE,
dev->clr_base);
return -ENOMEM;
}
}
return 0;
}
static void __devexit mthca_unmap_eq_regs(struct mthca_dev *dev)
{
if (mthca_is_memfree(dev)) {
mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
dev->fw.arbel.eq_set_ci_base,
MTHCA_EQ_SET_CI_SIZE,
dev->eq_regs.arbel.eq_set_ci_base);
mthca_unmap_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) &
dev->fw.arbel.eq_arm_base) + 4, 4,
dev->eq_regs.arbel.eq_arm);
mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
dev->clr_base);
} else {
mthca_unmap_reg(dev, MTHCA_ECR_BASE,
MTHCA_ECR_SIZE + MTHCA_ECR_CLR_SIZE,
dev->eq_regs.tavor.ecr_base);
mthca_unmap_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE,
dev->clr_base);
}
}
int __devinit mthca_map_eq_icm(struct mthca_dev *dev, u64 icm_virt)
{
int ret;
u8 status;
/*
* We assume that mapping one page is enough for the whole EQ
* context table. This is fine with all current HCAs, because
* we only use 32 EQs and each EQ uses 32 bytes of context
* memory, or 1 KB total.
*/
dev->eq_table.icm_virt = icm_virt;
dev->eq_table.icm_page = alloc_page(GFP_HIGHUSER);
if (!dev->eq_table.icm_page)
return -ENOMEM;
dev->eq_table.icm_dma = pci_map_page(dev->pdev, dev->eq_table.icm_page, 0,
PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
if (pci_dma_mapping_error(dev->eq_table.icm_dma)) {
__free_page(dev->eq_table.icm_page);
return -ENOMEM;
}
ret = mthca_MAP_ICM_page(dev, dev->eq_table.icm_dma, icm_virt, &status);
if (!ret && status)
ret = -EINVAL;
if (ret) {
pci_unmap_page(dev->pdev, dev->eq_table.icm_dma, PAGE_SIZE,
PCI_DMA_BIDIRECTIONAL);
__free_page(dev->eq_table.icm_page);
}
return ret;
}
void __devexit mthca_unmap_eq_icm(struct mthca_dev *dev)
{
u8 status;
mthca_UNMAP_ICM(dev, dev->eq_table.icm_virt, 1, &status);
pci_unmap_page(dev->pdev, dev->eq_table.icm_dma, PAGE_SIZE,
PCI_DMA_BIDIRECTIONAL);
__free_page(dev->eq_table.icm_page);
}
int __devinit mthca_init_eq_table(struct mthca_dev *dev)
{
int err;
u8 status;
u8 intr;
int i;
err = mthca_alloc_init(&dev->eq_table.alloc,
dev->limits.num_eqs,
dev->limits.num_eqs - 1,
dev->limits.reserved_eqs);
if (err)
return err;
err = mthca_map_eq_regs(dev);
if (err)
goto err_out_free;
if (dev->mthca_flags & MTHCA_FLAG_MSI ||
dev->mthca_flags & MTHCA_FLAG_MSI_X) {
dev->eq_table.clr_mask = 0;
} else {
dev->eq_table.clr_mask =
swab32(1 << (dev->eq_table.inta_pin & 31));
dev->eq_table.clr_int = dev->clr_base +
(dev->eq_table.inta_pin < 32 ? 4 : 0);
}
dev->eq_table.arm_mask = 0;
intr = (dev->mthca_flags & MTHCA_FLAG_MSI) ?
128 : dev->eq_table.inta_pin;
err = mthca_create_eq(dev, dev->limits.num_cqs + MTHCA_NUM_SPARE_EQE,
(dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 128 : intr,
&dev->eq_table.eq[MTHCA_EQ_COMP]);
if (err)
goto err_out_unmap;
err = mthca_create_eq(dev, MTHCA_NUM_ASYNC_EQE + MTHCA_NUM_SPARE_EQE,
(dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 129 : intr,
&dev->eq_table.eq[MTHCA_EQ_ASYNC]);
if (err)
goto err_out_comp;
err = mthca_create_eq(dev, MTHCA_NUM_CMD_EQE + MTHCA_NUM_SPARE_EQE,
(dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 130 : intr,
&dev->eq_table.eq[MTHCA_EQ_CMD]);
if (err)
goto err_out_async;
if (dev->mthca_flags & MTHCA_FLAG_MSI_X) {
static const char *eq_name[] = {
[MTHCA_EQ_COMP] = DRV_NAME " (comp)",
[MTHCA_EQ_ASYNC] = DRV_NAME " (async)",
[MTHCA_EQ_CMD] = DRV_NAME " (cmd)"
};
for (i = 0; i < MTHCA_NUM_EQ; ++i) {
err = request_irq(dev->eq_table.eq[i].msi_x_vector,
mthca_is_memfree(dev) ?
mthca_arbel_msi_x_interrupt :
mthca_tavor_msi_x_interrupt,
0, eq_name[i], dev->eq_table.eq + i);
if (err)
goto err_out_cmd;
dev->eq_table.eq[i].have_irq = 1;
}
} else {
err = request_irq(dev->pdev->irq,
mthca_is_memfree(dev) ?
mthca_arbel_interrupt :
mthca_tavor_interrupt,
SA_SHIRQ, DRV_NAME, dev);
if (err)
goto err_out_cmd;
dev->eq_table.have_irq = 1;
}
err = mthca_MAP_EQ(dev, async_mask(dev),
0, dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, &status);
if (err)
mthca_warn(dev, "MAP_EQ for async EQ %d failed (%d)\n",
dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, err);
if (status)
mthca_warn(dev, "MAP_EQ for async EQ %d returned status 0x%02x\n",
dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, status);
err = mthca_MAP_EQ(dev, MTHCA_CMD_EVENT_MASK,
0, dev->eq_table.eq[MTHCA_EQ_CMD].eqn, &status);
if (err)
mthca_warn(dev, "MAP_EQ for cmd EQ %d failed (%d)\n",
dev->eq_table.eq[MTHCA_EQ_CMD].eqn, err);
if (status)
mthca_warn(dev, "MAP_EQ for cmd EQ %d returned status 0x%02x\n",
dev->eq_table.eq[MTHCA_EQ_CMD].eqn, status);
for (i = 0; i < MTHCA_EQ_CMD; ++i)
if (mthca_is_memfree(dev))
arbel_eq_req_not(dev, dev->eq_table.eq[i].eqn_mask);
else
tavor_eq_req_not(dev, dev->eq_table.eq[i].eqn);
return 0;
err_out_cmd:
mthca_free_irqs(dev);
mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_CMD]);
err_out_async:
mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_ASYNC]);
err_out_comp:
mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_COMP]);
err_out_unmap:
mthca_unmap_eq_regs(dev);
err_out_free:
mthca_alloc_cleanup(&dev->eq_table.alloc);
return err;
}
void __devexit mthca_cleanup_eq_table(struct mthca_dev *dev)
{
u8 status;
int i;
mthca_free_irqs(dev);
mthca_MAP_EQ(dev, async_mask(dev),
1, dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, &status);
mthca_MAP_EQ(dev, MTHCA_CMD_EVENT_MASK,
1, dev->eq_table.eq[MTHCA_EQ_CMD].eqn, &status);
for (i = 0; i < MTHCA_NUM_EQ; ++i)
mthca_free_eq(dev, &dev->eq_table.eq[i]);
mthca_unmap_eq_regs(dev);
mthca_alloc_cleanup(&dev->eq_table.alloc);
}
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