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ab8403c424
linux/drivers/infiniband/hw/mthca/mthca_eq.c
Roland Dreier ab8403c424 IB/mthca: Avoid alignment traps when writing doorbells 
Architectures such as ia64 see alignment traps when doing a 64-bit 
read from __be32 doorbell[2] arrays to do doorbell writes in 
mthca_write64().  Fix this by just passing the two halves of the 
doorbell value into mthca_write64().  This actually improves the 
generated code by allowing the compiler to see what's going on better.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-15 20:17:27 -07:00

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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/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)
{
/*
* 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(MTHCA_EQ_DB_SET_CI | eq->eqn, ci & (eq->nent - 1),
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)
{
mthca_write64(MTHCA_EQ_DB_REQ_NOT | eqn, 0,
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)) {
mthca_write64(MTHCA_EQ_DB_DISARM_CQ | eqn, cqn,
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 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 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 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 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 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);
clear_page(eq->page_list[i].buf);
}
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 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 mthca_map_eq_regs(struct mthca_dev *dev)
{
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 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 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 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 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,
IRQF_SHARED, 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_NUM_EQ; ++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 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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