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Commit c0f28ce6 authored by Dave Jiang's avatar Dave Jiang Committed by Vinod Koul
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dmaengine: ioatdma: move all the init routines 

Moving all the init routines to init.c and fixup anything broken during
the move.
Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
Acked-by: default avatarDan Williams <dan.j.williams@intel.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 80b19736
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Showing with 1375 additions and 1372 deletions
drivers/dma/ioat/Makefile
View file @ c0f28ce6
obj-$(CONFIG_INTEL_IOATDMA) += ioatdma.o
ioatdma-y := pci.o dma.o dma_v3.o dca.o sysfs.o
ioatdma-y := init.o dma.o dma_v3.o dca.o sysfs.o
drivers/dma/ioat/dma.c
View file @ c0f28ce6
......@@ -37,30 +37,12 @@
#include "../dmaengine.h"
int ioat_pending_level = 4;
module_param(ioat_pending_level, int, 0644);
MODULE_PARM_DESC(ioat_pending_level,
"high-water mark for pushing ioat descriptors (default: 4)");
int ioat_ring_alloc_order = 8;
module_param(ioat_ring_alloc_order, int, 0644);
MODULE_PARM_DESC(ioat_ring_alloc_order,
"ioat+: allocate 2^n descriptors per channel (default: 8 max: 16)");
static int ioat_ring_max_alloc_order = IOAT_MAX_ORDER;
module_param(ioat_ring_max_alloc_order, int, 0644);
MODULE_PARM_DESC(ioat_ring_max_alloc_order,
"ioat+: upper limit for ring size (default: 16)");
static char ioat_interrupt_style[32] = "msix";
module_param_string(ioat_interrupt_style, ioat_interrupt_style,
sizeof(ioat_interrupt_style), 0644);
MODULE_PARM_DESC(ioat_interrupt_style,
"set ioat interrupt style: msix (default), msi, intx");
/**
* ioat_dma_do_interrupt - handler used for single vector interrupt mode
* @irq: interrupt id
* @data: interrupt data
*/
static irqreturn_t ioat_dma_do_interrupt(int irq, void *data)
irqreturn_t ioat_dma_do_interrupt(int irq, void *data)
{
struct ioatdma_device *instance = data;
struct ioatdma_chan *ioat_chan;
......@@ -94,7 +76,7 @@ static irqreturn_t ioat_dma_do_interrupt(int irq, void *data)
* @irq: interrupt id
* @data: interrupt data
*/
static irqreturn_t ioat_dma_do_interrupt_msix(int irq, void *data)
irqreturn_t ioat_dma_do_interrupt_msix(int irq, void *data)
{
struct ioatdma_chan *ioat_chan = data;
......@@ -104,28 +86,6 @@ static irqreturn_t ioat_dma_do_interrupt_msix(int irq, void *data)
return IRQ_HANDLED;
}
/* common channel initialization */
void
ioat_init_channel(struct ioatdma_device *ioat_dma,
struct ioatdma_chan *ioat_chan, int idx)
{
struct dma_device *dma = &ioat_dma->dma_dev;
struct dma_chan *c = &ioat_chan->dma_chan;
unsigned long data = (unsigned long) c;
ioat_chan->ioat_dma = ioat_dma;
ioat_chan->reg_base = ioat_dma->reg_base + (0x80 * (idx + 1));
spin_lock_init(&ioat_chan->cleanup_lock);
ioat_chan->dma_chan.device = dma;
dma_cookie_init(&ioat_chan->dma_chan);
list_add_tail(&ioat_chan->dma_chan.device_node, &dma->channels);
ioat_dma->idx[idx] = ioat_chan;
init_timer(&ioat_chan->timer);
ioat_chan->timer.function = ioat_dma->timer_fn;
ioat_chan->timer.data = data;
tasklet_init(&ioat_chan->cleanup_task, ioat_dma->cleanup_fn, data);
}
void ioat_stop(struct ioatdma_chan *ioat_chan)
{
struct ioatdma_device *ioat_dma = ioat_chan->ioat_dma;
......@@ -214,299 +174,6 @@ ioat_dma_tx_status(struct dma_chan *c, dma_cookie_t cookie,
return dma_cookie_status(c, cookie, txstate);
}
/*
* Perform a IOAT transaction to verify the HW works.
*/
#define IOAT_TEST_SIZE 2000
static void ioat_dma_test_callback(void *dma_async_param)
{
struct completion *cmp = dma_async_param;
complete(cmp);
}
/**
* ioat_dma_self_test - Perform a IOAT transaction to verify the HW works.
* @ioat_dma: dma device to be tested
*/
int ioat_dma_self_test(struct ioatdma_device *ioat_dma)
{
int i;
u8 *src;
u8 *dest;
struct dma_device *dma = &ioat_dma->dma_dev;
struct device *dev = &ioat_dma->pdev->dev;
struct dma_chan *dma_chan;
struct dma_async_tx_descriptor *tx;
dma_addr_t dma_dest, dma_src;
dma_cookie_t cookie;
int err = 0;
struct completion cmp;
unsigned long tmo;
unsigned long flags;
src = kzalloc(sizeof(u8) * IOAT_TEST_SIZE, GFP_KERNEL);
if (!src)
return -ENOMEM;
dest = kzalloc(sizeof(u8) * IOAT_TEST_SIZE, GFP_KERNEL);
if (!dest) {
kfree(src);
return -ENOMEM;
}
/* Fill in src buffer */
for (i = 0; i < IOAT_TEST_SIZE; i++)
src[i] = (u8)i;
/* Start copy, using first DMA channel */
dma_chan = container_of(dma->channels.next, struct dma_chan,
device_node);
if (dma->device_alloc_chan_resources(dma_chan) < 1) {
dev_err(dev, "selftest cannot allocate chan resource\n");
err = -ENODEV;
goto out;
}
dma_src = dma_map_single(dev, src, IOAT_TEST_SIZE, DMA_TO_DEVICE);
if (dma_mapping_error(dev, dma_src)) {
dev_err(dev, "mapping src buffer failed\n");
goto free_resources;
}
dma_dest = dma_map_single(dev, dest, IOAT_TEST_SIZE, DMA_FROM_DEVICE);
if (dma_mapping_error(dev, dma_dest)) {
dev_err(dev, "mapping dest buffer failed\n");
goto unmap_src;
}
flags = DMA_PREP_INTERRUPT;
tx = ioat_dma->dma_dev.device_prep_dma_memcpy(dma_chan, dma_dest,
dma_src, IOAT_TEST_SIZE,
flags);
if (!tx) {
dev_err(dev, "Self-test prep failed, disabling\n");
err = -ENODEV;
goto unmap_dma;
}
async_tx_ack(tx);
init_completion(&cmp);
tx->callback = ioat_dma_test_callback;
tx->callback_param = &cmp;
cookie = tx->tx_submit(tx);
if (cookie < 0) {
dev_err(dev, "Self-test setup failed, disabling\n");
err = -ENODEV;
goto unmap_dma;
}
dma->device_issue_pending(dma_chan);
tmo = wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000));
if (tmo == 0 ||
dma->device_tx_status(dma_chan, cookie, NULL)
!= DMA_COMPLETE) {
dev_err(dev, "Self-test copy timed out, disabling\n");
err = -ENODEV;
goto unmap_dma;
}
if (memcmp(src, dest, IOAT_TEST_SIZE)) {
dev_err(dev, "Self-test copy failed compare, disabling\n");
err = -ENODEV;
goto free_resources;
}
unmap_dma:
dma_unmap_single(dev, dma_dest, IOAT_TEST_SIZE, DMA_FROM_DEVICE);
unmap_src:
dma_unmap_single(dev, dma_src, IOAT_TEST_SIZE, DMA_TO_DEVICE);
free_resources:
dma->device_free_chan_resources(dma_chan);
out:
kfree(src);
kfree(dest);
return err;
}
/**
* ioat_dma_setup_interrupts - setup interrupt handler
* @ioat_dma: ioat dma device
*/
int ioat_dma_setup_interrupts(struct ioatdma_device *ioat_dma)
{
struct ioatdma_chan *ioat_chan;
struct pci_dev *pdev = ioat_dma->pdev;
struct device *dev = &pdev->dev;
struct msix_entry *msix;
int i, j, msixcnt;
int err = -EINVAL;
u8 intrctrl = 0;
if (!strcmp(ioat_interrupt_style, "msix"))
goto msix;
if (!strcmp(ioat_interrupt_style, "msi"))
goto msi;
if (!strcmp(ioat_interrupt_style, "intx"))
goto intx;
dev_err(dev, "invalid ioat_interrupt_style %s\n", ioat_interrupt_style);
goto err_no_irq;
msix:
/* The number of MSI-X vectors should equal the number of channels */
msixcnt = ioat_dma->dma_dev.chancnt;
for (i = 0; i < msixcnt; i++)
ioat_dma->msix_entries[i].entry = i;
err = pci_enable_msix_exact(pdev, ioat_dma->msix_entries, msixcnt);
if (err)
goto msi;
for (i = 0; i < msixcnt; i++) {
msix = &ioat_dma->msix_entries[i];
ioat_chan = ioat_chan_by_index(ioat_dma, i);
err = devm_request_irq(dev, msix->vector,
ioat_dma_do_interrupt_msix, 0,
"ioat-msix", ioat_chan);
if (err) {
for (j = 0; j < i; j++) {
msix = &ioat_dma->msix_entries[j];
ioat_chan = ioat_chan_by_index(ioat_dma, j);
devm_free_irq(dev, msix->vector, ioat_chan);
}
goto msi;
}
}
intrctrl |= IOAT_INTRCTRL_MSIX_VECTOR_CONTROL;
ioat_dma->irq_mode = IOAT_MSIX;
goto done;
msi:
err = pci_enable_msi(pdev);
if (err)
goto intx;
err = devm_request_irq(dev, pdev->irq, ioat_dma_do_interrupt, 0,
"ioat-msi", ioat_dma);
if (err) {
pci_disable_msi(pdev);
goto intx;
}
ioat_dma->irq_mode = IOAT_MSI;
goto done;
intx:
err = devm_request_irq(dev, pdev->irq, ioat_dma_do_interrupt,
IRQF_SHARED, "ioat-intx", ioat_dma);
if (err)
goto err_no_irq;
ioat_dma->irq_mode = IOAT_INTX;
done:
if (ioat_dma->intr_quirk)
ioat_dma->intr_quirk(ioat_dma);
intrctrl |= IOAT_INTRCTRL_MASTER_INT_EN;
writeb(intrctrl, ioat_dma->reg_base + IOAT_INTRCTRL_OFFSET);
return 0;
err_no_irq:
/* Disable all interrupt generation */
writeb(0, ioat_dma->reg_base + IOAT_INTRCTRL_OFFSET);
ioat_dma->irq_mode = IOAT_NOIRQ;
dev_err(dev, "no usable interrupts\n");
return err;
}
EXPORT_SYMBOL(ioat_dma_setup_interrupts);
static void ioat_disable_interrupts(struct ioatdma_device *ioat_dma)
{
/* Disable all interrupt generation */
writeb(0, ioat_dma->reg_base + IOAT_INTRCTRL_OFFSET);
}
int ioat_probe(struct ioatdma_device *ioat_dma)
{
int err = -ENODEV;
struct dma_device *dma = &ioat_dma->dma_dev;
struct pci_dev *pdev = ioat_dma->pdev;
struct device *dev = &pdev->dev;
/* DMA coherent memory pool for DMA descriptor allocations */
ioat_dma->dma_pool = pci_pool_create("dma_desc_pool", pdev,
sizeof(struct ioat_dma_descriptor),
64, 0);
if (!ioat_dma->dma_pool) {
err = -ENOMEM;
goto err_dma_pool;
}
ioat_dma->completion_pool = pci_pool_create("completion_pool", pdev,
sizeof(u64),
SMP_CACHE_BYTES,
SMP_CACHE_BYTES);
if (!ioat_dma->completion_pool) {
err = -ENOMEM;
goto err_completion_pool;
}
ioat_dma->enumerate_channels(ioat_dma);
dma_cap_set(DMA_MEMCPY, dma->cap_mask);
dma->dev = &pdev->dev;
if (!dma->chancnt) {
dev_err(dev, "channel enumeration error\n");
goto err_setup_interrupts;
}
err = ioat_dma_setup_interrupts(ioat_dma);
if (err)
goto err_setup_interrupts;
err = ioat_dma->self_test(ioat_dma);
if (err)
goto err_self_test;
return 0;
err_self_test:
ioat_disable_interrupts(ioat_dma);
err_setup_interrupts:
pci_pool_destroy(ioat_dma->completion_pool);
err_completion_pool:
pci_pool_destroy(ioat_dma->dma_pool);
err_dma_pool:
return err;
}
int ioat_register(struct ioatdma_device *ioat_dma)
{
int err = dma_async_device_register(&ioat_dma->dma_dev);
if (err) {
ioat_disable_interrupts(ioat_dma);
pci_pool_destroy(ioat_dma->completion_pool);
pci_pool_destroy(ioat_dma->dma_pool);
}
return err;
}
void ioat_dma_remove(struct ioatdma_device *ioat_dma)
{
struct dma_device *dma = &ioat_dma->dma_dev;
ioat_disable_interrupts(ioat_dma);
ioat_kobject_del(ioat_dma);
dma_async_device_unregister(dma);
pci_pool_destroy(ioat_dma->dma_pool);
pci_pool_destroy(ioat_dma->completion_pool);
INIT_LIST_HEAD(&dma->channels);
}
void __ioat_issue_pending(struct ioatdma_chan *ioat_chan)
{
ioat_chan->dmacount += ioat_ring_pending(ioat_chan);
......@@ -577,7 +244,7 @@ static void __ioat_start_null_desc(struct ioatdma_chan *ioat_chan)
__ioat_issue_pending(ioat_chan);
}
static void ioat_start_null_desc(struct ioatdma_chan *ioat_chan)
void ioat_start_null_desc(struct ioatdma_chan *ioat_chan)
{
spin_lock_bh(&ioat_chan->prep_lock);
__ioat_start_null_desc(ioat_chan);
......@@ -645,49 +312,6 @@ int ioat_reset_sync(struct ioatdma_chan *ioat_chan, unsigned long tmo)
return err;
}
/**
* ioat_enumerate_channels - find and initialize the device's channels
* @ioat_dma: the ioat dma device to be enumerated
*/
int ioat_enumerate_channels(struct ioatdma_device *ioat_dma)
{
struct ioatdma_chan *ioat_chan;
struct device *dev = &ioat_dma->pdev->dev;
struct dma_device *dma = &ioat_dma->dma_dev;
u8 xfercap_log;
int i;
INIT_LIST_HEAD(&dma->channels);
dma->chancnt = readb(ioat_dma->reg_base + IOAT_CHANCNT_OFFSET);
dma->chancnt &= 0x1f; /* bits [4:0] valid */
if (dma->chancnt > ARRAY_SIZE(ioat_dma->idx)) {
dev_warn(dev, "(%d) exceeds max supported channels (%zu)\n",
dma->chancnt, ARRAY_SIZE(ioat_dma->idx));
dma->chancnt = ARRAY_SIZE(ioat_dma->idx);
}
xfercap_log = readb(ioat_dma->reg_base + IOAT_XFERCAP_OFFSET);
xfercap_log &= 0x1f; /* bits [4:0] valid */
if (xfercap_log == 0)
return 0;
dev_dbg(dev, "%s: xfercap = %d\n", __func__, 1 << xfercap_log);
for (i = 0; i < dma->chancnt; i++) {
ioat_chan = devm_kzalloc(dev, sizeof(*ioat_chan), GFP_KERNEL);
if (!ioat_chan)
break;
ioat_init_channel(ioat_dma, ioat_chan, i);
ioat_chan->xfercap_log = xfercap_log;
spin_lock_init(&ioat_chan->prep_lock);
if (ioat_dma->reset_hw(ioat_chan)) {
i = 0;
break;
}
}
dma->chancnt = i;
return i;
}
static dma_cookie_t ioat_tx_submit_unlock(struct dma_async_tx_descriptor *tx)
{
struct dma_chan *c = tx->chan;
......@@ -741,8 +365,7 @@ ioat_alloc_ring_ent(struct dma_chan *chan, gfp_t flags)
return desc;
}
static void
ioat_free_ring_ent(struct ioat_ring_ent *desc, struct dma_chan *chan)
void ioat_free_ring_ent(struct ioat_ring_ent *desc, struct dma_chan *chan)
{
struct ioatdma_device *ioat_dma;
......@@ -751,7 +374,7 @@ ioat_free_ring_ent(struct ioat_ring_ent *desc, struct dma_chan *chan)
kmem_cache_free(ioat_cache, desc);
}
static struct ioat_ring_ent **
struct ioat_ring_ent **
ioat_alloc_ring(struct dma_chan *c, int order, gfp_t flags)
{
struct ioat_ring_ent **ring;
......@@ -788,128 +411,6 @@ ioat_alloc_ring(struct dma_chan *c, int order, gfp_t flags)
return ring;
}
/**
* ioat_free_chan_resources - release all the descriptors
* @chan: the channel to be cleaned
*/
void ioat_free_chan_resources(struct dma_chan *c)
{
struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
struct ioatdma_device *ioat_dma = ioat_chan->ioat_dma;
struct ioat_ring_ent *desc;
const int total_descs = 1 << ioat_chan->alloc_order;
int descs;
int i;
/* Before freeing channel resources first check
* if they have been previously allocated for this channel.
*/
if (!ioat_chan->ring)
return;
ioat_stop(ioat_chan);
ioat_dma->reset_hw(ioat_chan);
spin_lock_bh(&ioat_chan->cleanup_lock);
spin_lock_bh(&ioat_chan->prep_lock);
descs = ioat_ring_space(ioat_chan);
dev_dbg(to_dev(ioat_chan), "freeing %d idle descriptors\n", descs);
for (i = 0; i < descs; i++) {
desc = ioat_get_ring_ent(ioat_chan, ioat_chan->head + i);
ioat_free_ring_ent(desc, c);
}
if (descs < total_descs)
dev_err(to_dev(ioat_chan), "Freeing %d in use descriptors!\n",
total_descs - descs);
for (i = 0; i < total_descs - descs; i++) {
desc = ioat_get_ring_ent(ioat_chan, ioat_chan->tail + i);
dump_desc_dbg(ioat_chan, desc);
ioat_free_ring_ent(desc, c);
}
kfree(ioat_chan->ring);
ioat_chan->ring = NULL;
ioat_chan->alloc_order = 0;
pci_pool_free(ioat_dma->completion_pool, ioat_chan->completion,
ioat_chan->completion_dma);
spin_unlock_bh(&ioat_chan->prep_lock);
spin_unlock_bh(&ioat_chan->cleanup_lock);
ioat_chan->last_completion = 0;
ioat_chan->completion_dma = 0;
ioat_chan->dmacount = 0;
}
/* ioat_alloc_chan_resources - allocate/initialize ioat descriptor ring
* @chan: channel to be initialized
*/
int ioat_alloc_chan_resources(struct dma_chan *c)
{
struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
struct ioat_ring_ent **ring;
u64 status;
int order;
int i = 0;
u32 chanerr;
/* have we already been set up? */
if (ioat_chan->ring)
return 1 << ioat_chan->alloc_order;
/* Setup register to interrupt and write completion status on error */
writew(IOAT_CHANCTRL_RUN, ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET);
/* allocate a completion writeback area */
/* doing 2 32bit writes to mmio since 1 64b write doesn't work */
ioat_chan->completion =
pci_pool_alloc(ioat_chan->ioat_dma->completion_pool,
GFP_KERNEL, &ioat_chan->completion_dma);
if (!ioat_chan->completion)
return -ENOMEM;
memset(ioat_chan->completion, 0, sizeof(*ioat_chan->completion));
writel(((u64)ioat_chan->completion_dma) & 0x00000000FFFFFFFF,
ioat_chan->reg_base + IOAT_CHANCMP_OFFSET_LOW);
writel(((u64)ioat_chan->completion_dma) >> 32,
ioat_chan->reg_base + IOAT_CHANCMP_OFFSET_HIGH);
order = ioat_get_alloc_order();
ring = ioat_alloc_ring(c, order, GFP_KERNEL);
if (!ring)
return -ENOMEM;
spin_lock_bh(&ioat_chan->cleanup_lock);
spin_lock_bh(&ioat_chan->prep_lock);
ioat_chan->ring = ring;
ioat_chan->head = 0;
ioat_chan->issued = 0;
ioat_chan->tail = 0;
ioat_chan->alloc_order = order;
set_bit(IOAT_RUN, &ioat_chan->state);
spin_unlock_bh(&ioat_chan->prep_lock);
spin_unlock_bh(&ioat_chan->cleanup_lock);
ioat_start_null_desc(ioat_chan);
/* check that we got off the ground */
do {
udelay(1);
status = ioat_chansts(ioat_chan);
} while (i++ < 20 && !is_ioat_active(status) && !is_ioat_idle(status));
if (is_ioat_active(status) || is_ioat_idle(status))
return 1 << ioat_chan->alloc_order;
chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
dev_WARN(to_dev(ioat_chan),
"failed to start channel chanerr: %#x\n", chanerr);
ioat_free_chan_resources(c);
return -EFAULT;
}
bool reshape_ring(struct ioatdma_chan *ioat_chan, int order)
{
/* reshape differs from normal ring allocation in that we want
......
drivers/dma/ioat/dma.h
View file @ c0f28ce6
......@@ -381,6 +381,43 @@ ioat_set_chainaddr(struct ioatdma_chan *ioat_chan, u64 addr)
ioat_chan->reg_base + IOAT2_CHAINADDR_OFFSET_HIGH);
}
irqreturn_t ioat_dma_do_interrupt(int irq, void *data);
irqreturn_t ioat_dma_do_interrupt_msix(int irq, void *data);
struct ioat_ring_ent **
ioat_alloc_ring(struct dma_chan *c, int order, gfp_t flags);
void ioat_start_null_desc(struct ioatdma_chan *ioat_chan);
void ioat_free_ring_ent(struct ioat_ring_ent *desc, struct dma_chan *chan);
int ioat_reset_hw(struct ioatdma_chan *ioat_chan);
struct dma_async_tx_descriptor *
ioat_prep_interrupt_lock(struct dma_chan *c, unsigned long flags);
struct dma_async_tx_descriptor *
ioat_prep_xor(struct dma_chan *chan, dma_addr_t dest, dma_addr_t *src,
unsigned int src_cnt, size_t len, unsigned long flags);
struct dma_async_tx_descriptor *
ioat_prep_xor_val(struct dma_chan *chan, dma_addr_t *src,
unsigned int src_cnt, size_t len,
enum sum_check_flags *result, unsigned long flags);
struct dma_async_tx_descriptor *
ioat_prep_pq(struct dma_chan *chan, dma_addr_t *dst, dma_addr_t *src,
unsigned int src_cnt, const unsigned char *scf, size_t len,
unsigned long flags);
struct dma_async_tx_descriptor *
ioat_prep_pq_val(struct dma_chan *chan, dma_addr_t *pq, dma_addr_t *src,
unsigned int src_cnt, const unsigned char *scf, size_t len,
enum sum_check_flags *pqres, unsigned long flags);
struct dma_async_tx_descriptor *
ioat_prep_pqxor(struct dma_chan *chan, dma_addr_t dst, dma_addr_t *src,
unsigned int src_cnt, size_t len, unsigned long flags);
struct dma_async_tx_descriptor *
ioat_prep_pqxor_val(struct dma_chan *chan, dma_addr_t *src,
unsigned int src_cnt, size_t len,
enum sum_check_flags *result, unsigned long flags);
enum dma_status
ioat_tx_status(struct dma_chan *c, dma_cookie_t cookie,
struct dma_tx_state *txstate);
void ioat_cleanup_event(unsigned long data);
void ioat_timer_event(unsigned long data);
bool is_bwd_ioat(struct pci_dev *pdev);
int ioat_probe(struct ioatdma_device *ioat_dma);
int ioat_register(struct ioatdma_device *ioat_dma);
int ioat_dma_self_test(struct ioatdma_device *ioat_dma);
......@@ -421,5 +458,7 @@ extern int ioat_pending_level;
extern int ioat_ring_alloc_order;
extern struct kobj_type ioat_ktype;
extern struct kmem_cache *ioat_cache;
extern int ioat_ring_max_alloc_order;
extern struct kmem_cache *ioat_sed_cache;
#endif /* IOATDMA_H */
drivers/dma/ioat/dma_v3.c
View file @ c0f28ce6
......@@ -62,8 +62,6 @@
#include "hw.h"
#include "dma.h"
extern struct kmem_cache *ioat3_sed_cache;
/* ioat hardware assumes at least two sources for raid operations */
#define src_cnt_to_sw(x) ((x) + 2)
#define src_cnt_to_hw(x) ((x) - 2)
......@@ -118,124 +116,6 @@ static void pq_set_src(struct ioat_raw_descriptor *descs[2],
pq->coef[idx] = coef;
}
static bool is_jf_ioat(struct pci_dev *pdev)
{
switch (pdev->device) {
case PCI_DEVICE_ID_INTEL_IOAT_JSF0:
case PCI_DEVICE_ID_INTEL_IOAT_JSF1:
case PCI_DEVICE_ID_INTEL_IOAT_JSF2:
case PCI_DEVICE_ID_INTEL_IOAT_JSF3:
case PCI_DEVICE_ID_INTEL_IOAT_JSF4:
case PCI_DEVICE_ID_INTEL_IOAT_JSF5:
case PCI_DEVICE_ID_INTEL_IOAT_JSF6:
case PCI_DEVICE_ID_INTEL_IOAT_JSF7:
case PCI_DEVICE_ID_INTEL_IOAT_JSF8:
case PCI_DEVICE_ID_INTEL_IOAT_JSF9:
return true;
default:
return false;
}
}
static bool is_snb_ioat(struct pci_dev *pdev)
{
switch (pdev->device) {
case PCI_DEVICE_ID_INTEL_IOAT_SNB0:
case PCI_DEVICE_ID_INTEL_IOAT_SNB1:
case PCI_DEVICE_ID_INTEL_IOAT_SNB2:
case PCI_DEVICE_ID_INTEL_IOAT_SNB3:
case PCI_DEVICE_ID_INTEL_IOAT_SNB4:
case PCI_DEVICE_ID_INTEL_IOAT_SNB5:
case PCI_DEVICE_ID_INTEL_IOAT_SNB6:
case PCI_DEVICE_ID_INTEL_IOAT_SNB7:
case PCI_DEVICE_ID_INTEL_IOAT_SNB8:
case PCI_DEVICE_ID_INTEL_IOAT_SNB9:
return true;
default:
return false;
}
}
static bool is_ivb_ioat(struct pci_dev *pdev)
{
switch (pdev->device) {
case PCI_DEVICE_ID_INTEL_IOAT_IVB0:
case PCI_DEVICE_ID_INTEL_IOAT_IVB1:
case PCI_DEVICE_ID_INTEL_IOAT_IVB2:
case PCI_DEVICE_ID_INTEL_IOAT_IVB3:
case PCI_DEVICE_ID_INTEL_IOAT_IVB4:
case PCI_DEVICE_ID_INTEL_IOAT_IVB5:
case PCI_DEVICE_ID_INTEL_IOAT_IVB6:
case PCI_DEVICE_ID_INTEL_IOAT_IVB7:
case PCI_DEVICE_ID_INTEL_IOAT_IVB8:
case PCI_DEVICE_ID_INTEL_IOAT_IVB9:
return true;
default:
return false;
}
}
static bool is_hsw_ioat(struct pci_dev *pdev)
{
switch (pdev->device) {
case PCI_DEVICE_ID_INTEL_IOAT_HSW0:
case PCI_DEVICE_ID_INTEL_IOAT_HSW1:
case PCI_DEVICE_ID_INTEL_IOAT_HSW2:
case PCI_DEVICE_ID_INTEL_IOAT_HSW3:
case PCI_DEVICE_ID_INTEL_IOAT_HSW4:
case PCI_DEVICE_ID_INTEL_IOAT_HSW5:
case PCI_DEVICE_ID_INTEL_IOAT_HSW6:
case PCI_DEVICE_ID_INTEL_IOAT_HSW7:
case PCI_DEVICE_ID_INTEL_IOAT_HSW8:
case PCI_DEVICE_ID_INTEL_IOAT_HSW9:
return true;
default:
return false;
}
}
static bool is_xeon_cb32(struct pci_dev *pdev)
{
return is_jf_ioat(pdev) || is_snb_ioat(pdev) || is_ivb_ioat(pdev) ||
is_hsw_ioat(pdev);
}
static bool is_bwd_ioat(struct pci_dev *pdev)
{
switch (pdev->device) {
case PCI_DEVICE_ID_INTEL_IOAT_BWD0:
case PCI_DEVICE_ID_INTEL_IOAT_BWD1:
case PCI_DEVICE_ID_INTEL_IOAT_BWD2:
case PCI_DEVICE_ID_INTEL_IOAT_BWD3:
/* even though not Atom, BDX-DE has same DMA silicon */
case PCI_DEVICE_ID_INTEL_IOAT_BDXDE0:
case PCI_DEVICE_ID_INTEL_IOAT_BDXDE1:
case PCI_DEVICE_ID_INTEL_IOAT_BDXDE2:
case PCI_DEVICE_ID_INTEL_IOAT_BDXDE3:
return true;
default:
return false;
}
}
static bool is_bwd_noraid(struct pci_dev *pdev)
{
switch (pdev->device) {
case PCI_DEVICE_ID_INTEL_IOAT_BWD2:
case PCI_DEVICE_ID_INTEL_IOAT_BWD3:
case PCI_DEVICE_ID_INTEL_IOAT_BDXDE0:
case PCI_DEVICE_ID_INTEL_IOAT_BDXDE1:
case PCI_DEVICE_ID_INTEL_IOAT_BDXDE2:
case PCI_DEVICE_ID_INTEL_IOAT_BDXDE3:
return true;
default:
return false;
}
}
static void pq16_set_src(struct ioat_raw_descriptor *desc[3],
dma_addr_t addr, u32 offset, u8 coef, unsigned idx)
{
......@@ -258,7 +138,7 @@ ioat3_alloc_sed(struct ioatdma_device *ioat_dma, unsigned int hw_pool)
struct ioat_sed_ent *sed;
gfp_t flags = __GFP_ZERO | GFP_ATOMIC;
sed = kmem_cache_alloc(ioat3_sed_cache, flags);
sed = kmem_cache_alloc(ioat_sed_cache, flags);
if (!sed)
return NULL;
......@@ -266,7 +146,7 @@ ioat3_alloc_sed(struct ioatdma_device *ioat_dma, unsigned int hw_pool)
sed->hw = dma_pool_alloc(ioat_dma->sed_hw_pool[hw_pool],
flags, &sed->dma);
if (!sed->hw) {
kmem_cache_free(ioat3_sed_cache, sed);
kmem_cache_free(ioat_sed_cache, sed);
return NULL;
}
......@@ -280,7 +160,7 @@ ioat3_free_sed(struct ioatdma_device *ioat_dma, struct ioat_sed_ent *sed)
return;
dma_pool_free(ioat_dma->sed_hw_pool[sed->hw_pool], sed->hw, sed->dma);
kmem_cache_free(ioat3_sed_cache, sed);
kmem_cache_free(ioat_sed_cache, sed);
}
static bool desc_has_ext(struct ioat_ring_ent *desc)
......@@ -464,7 +344,7 @@ static void ioat3_cleanup(struct ioatdma_chan *ioat_chan)
spin_unlock_bh(&ioat_chan->cleanup_lock);
}
static void ioat3_cleanup_event(unsigned long data)
void ioat_cleanup_event(unsigned long data)
{
struct ioatdma_chan *ioat_chan = to_ioat_chan((void *)data);
......@@ -582,7 +462,7 @@ static void check_active(struct ioatdma_chan *ioat_chan)
}
static void ioat3_timer_event(unsigned long data)
void ioat_timer_event(unsigned long data)
{
struct ioatdma_chan *ioat_chan = to_ioat_chan((void *)data);
dma_addr_t phys_complete;
......@@ -634,8 +514,8 @@ static void ioat3_timer_event(unsigned long data)
spin_unlock_bh(&ioat_chan->cleanup_lock);
}
static enum dma_status
ioat3_tx_status(struct dma_chan *c, dma_cookie_t cookie,
enum dma_status
ioat_tx_status(struct dma_chan *c, dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
......@@ -651,7 +531,7 @@ ioat3_tx_status(struct dma_chan *c, dma_cookie_t cookie,
}
static struct dma_async_tx_descriptor *
__ioat3_prep_xor_lock(struct dma_chan *c, enum sum_check_flags *result,
__ioat_prep_xor_lock(struct dma_chan *c, enum sum_check_flags *result,
dma_addr_t dest, dma_addr_t *src, unsigned int src_cnt,
size_t len, unsigned long flags)
{
......@@ -743,15 +623,15 @@ __ioat3_prep_xor_lock(struct dma_chan *c, enum sum_check_flags *result,
return &compl_desc->txd;
}
static struct dma_async_tx_descriptor *
ioat3_prep_xor(struct dma_chan *chan, dma_addr_t dest, dma_addr_t *src,
struct dma_async_tx_descriptor *
ioat_prep_xor(struct dma_chan *chan, dma_addr_t dest, dma_addr_t *src,
unsigned int src_cnt, size_t len, unsigned long flags)
{
return __ioat3_prep_xor_lock(chan, NULL, dest, src, src_cnt, len, flags);
return __ioat_prep_xor_lock(chan, NULL, dest, src, src_cnt, len, flags);
}
static struct dma_async_tx_descriptor *
ioat3_prep_xor_val(struct dma_chan *chan, dma_addr_t *src,
struct dma_async_tx_descriptor *
ioat_prep_xor_val(struct dma_chan *chan, dma_addr_t *src,
unsigned int src_cnt, size_t len,
enum sum_check_flags *result, unsigned long flags)
{
......@@ -760,7 +640,7 @@ ioat3_prep_xor_val(struct dma_chan *chan, dma_addr_t *src,
*/
*result = 0;
return __ioat3_prep_xor_lock(chan, result, src[0], &src[1],
return __ioat_prep_xor_lock(chan, result, src[0], &src[1],
src_cnt - 1, len, flags);
}
......@@ -828,7 +708,7 @@ static void dump_pq16_desc_dbg(struct ioatdma_chan *ioat_chan,
}
static struct dma_async_tx_descriptor *
__ioat3_prep_pq_lock(struct dma_chan *c, enum sum_check_flags *result,
__ioat_prep_pq_lock(struct dma_chan *c, enum sum_check_flags *result,
const dma_addr_t *dst, const dma_addr_t *src,
unsigned int src_cnt, const unsigned char *scf,
size_t len, unsigned long flags)
......@@ -952,7 +832,7 @@ __ioat3_prep_pq_lock(struct dma_chan *c, enum sum_check_flags *result,
}
static struct dma_async_tx_descriptor *
__ioat3_prep_pq16_lock(struct dma_chan *c, enum sum_check_flags *result,
__ioat_prep_pq16_lock(struct dma_chan *c, enum sum_check_flags *result,
const dma_addr_t *dst, const dma_addr_t *src,
unsigned int src_cnt, const unsigned char *scf,
size_t len, unsigned long flags)
......@@ -1062,8 +942,8 @@ static int src_cnt_flags(unsigned int src_cnt, unsigned long flags)
return src_cnt;
}
static struct dma_async_tx_descriptor *
ioat3_prep_pq(struct dma_chan *chan, dma_addr_t *dst, dma_addr_t *src,
struct dma_async_tx_descriptor *
ioat_prep_pq(struct dma_chan *chan, dma_addr_t *dst, dma_addr_t *src,
unsigned int src_cnt, const unsigned char *scf, size_t len,
unsigned long flags)
{
......@@ -1087,23 +967,23 @@ ioat3_prep_pq(struct dma_chan *chan, dma_addr_t *dst, dma_addr_t *src,
single_source_coef[1] = 0;
return src_cnt_flags(src_cnt, flags) > 8 ?
__ioat3_prep_pq16_lock(chan, NULL, dst, single_source,
__ioat_prep_pq16_lock(chan, NULL, dst, single_source,
2, single_source_coef, len,
flags) :
__ioat3_prep_pq_lock(chan, NULL, dst, single_source, 2,
__ioat_prep_pq_lock(chan, NULL, dst, single_source, 2,
single_source_coef, len, flags);
} else {
return src_cnt_flags(src_cnt, flags) > 8 ?
__ioat3_prep_pq16_lock(chan, NULL, dst, src, src_cnt,
__ioat_prep_pq16_lock(chan, NULL, dst, src, src_cnt,
scf, len, flags) :
__ioat3_prep_pq_lock(chan, NULL, dst, src, src_cnt,
__ioat_prep_pq_lock(chan, NULL, dst, src, src_cnt,
scf, len, flags);
}
}
static struct dma_async_tx_descriptor *
ioat3_prep_pq_val(struct dma_chan *chan, dma_addr_t *pq, dma_addr_t *src,
struct dma_async_tx_descriptor *
ioat_prep_pq_val(struct dma_chan *chan, dma_addr_t *pq, dma_addr_t *src,
unsigned int src_cnt, const unsigned char *scf, size_t len,
enum sum_check_flags *pqres, unsigned long flags)
{
......@@ -1119,14 +999,14 @@ ioat3_prep_pq_val(struct dma_chan *chan, dma_addr_t *pq, dma_addr_t *src,
*pqres = 0;
return src_cnt_flags(src_cnt, flags) > 8 ?
__ioat3_prep_pq16_lock(chan, pqres, pq, src, src_cnt, scf, len,
__ioat_prep_pq16_lock(chan, pqres, pq, src, src_cnt, scf, len,
flags) :
__ioat3_prep_pq_lock(chan, pqres, pq, src, src_cnt, scf, len,
__ioat_prep_pq_lock(chan, pqres, pq, src, src_cnt, scf, len,
flags);
}
static struct dma_async_tx_descriptor *
ioat3_prep_pqxor(struct dma_chan *chan, dma_addr_t dst, dma_addr_t *src,
struct dma_async_tx_descriptor *
ioat_prep_pqxor(struct dma_chan *chan, dma_addr_t dst, dma_addr_t *src,
unsigned int src_cnt, size_t len, unsigned long flags)
{
unsigned char scf[src_cnt];
......@@ -1138,14 +1018,14 @@ ioat3_prep_pqxor(struct dma_chan *chan, dma_addr_t dst, dma_addr_t *src,
pq[1] = dst; /* specify valid address for disabled result */
return src_cnt_flags(src_cnt, flags) > 8 ?
__ioat3_prep_pq16_lock(chan, NULL, pq, src, src_cnt, scf, len,
__ioat_prep_pq16_lock(chan, NULL, pq, src, src_cnt, scf, len,
flags) :
__ioat3_prep_pq_lock(chan, NULL, pq, src, src_cnt, scf, len,
__ioat_prep_pq_lock(chan, NULL, pq, src, src_cnt, scf, len,
flags);
}
static struct dma_async_tx_descriptor *
ioat3_prep_pqxor_val(struct dma_chan *chan, dma_addr_t *src,
struct dma_async_tx_descriptor *
ioat_prep_pqxor_val(struct dma_chan *chan, dma_addr_t *src,
unsigned int src_cnt, size_t len,
enum sum_check_flags *result, unsigned long flags)
{
......@@ -1163,14 +1043,14 @@ ioat3_prep_pqxor_val(struct dma_chan *chan, dma_addr_t *src,
pq[1] = pq[0]; /* specify valid address for disabled result */
return src_cnt_flags(src_cnt, flags) > 8 ?
__ioat3_prep_pq16_lock(chan, result, pq, &src[1], src_cnt - 1,
__ioat_prep_pq16_lock(chan, result, pq, &src[1], src_cnt - 1,
scf, len, flags) :
__ioat3_prep_pq_lock(chan, result, pq, &src[1], src_cnt - 1,
__ioat_prep_pq_lock(chan, result, pq, &src[1], src_cnt - 1,
scf, len, flags);
}
static struct dma_async_tx_descriptor *
ioat3_prep_interrupt_lock(struct dma_chan *c, unsigned long flags)
struct dma_async_tx_descriptor *
ioat_prep_interrupt_lock(struct dma_chan *c, unsigned long flags)
{
struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
struct ioat_ring_ent *desc;
......@@ -1200,293 +1080,6 @@ ioat3_prep_interrupt_lock(struct dma_chan *c, unsigned long flags)
return &desc->txd;
}
static void ioat3_dma_test_callback(void *dma_async_param)
{
struct completion *cmp = dma_async_param;
complete(cmp);
}
#define IOAT_NUM_SRC_TEST 6 /* must be <= 8 */
static int ioat_xor_val_self_test(struct ioatdma_device *ioat_dma)
{
int i, src_idx;
struct page *dest;
struct page *xor_srcs[IOAT_NUM_SRC_TEST];
struct page *xor_val_srcs[IOAT_NUM_SRC_TEST + 1];
dma_addr_t dma_srcs[IOAT_NUM_SRC_TEST + 1];
dma_addr_t dest_dma;
struct dma_async_tx_descriptor *tx;
struct dma_chan *dma_chan;
dma_cookie_t cookie;
u8 cmp_byte = 0;
u32 cmp_word;
u32 xor_val_result;
int err = 0;
struct completion cmp;
unsigned long tmo;
struct device *dev = &ioat_dma->pdev->dev;
struct dma_device *dma = &ioat_dma->dma_dev;
u8 op = 0;
dev_dbg(dev, "%s\n", __func__);
if (!dma_has_cap(DMA_XOR, dma->cap_mask))
return 0;
for (src_idx = 0; src_idx < IOAT_NUM_SRC_TEST; src_idx++) {
xor_srcs[src_idx] = alloc_page(GFP_KERNEL);
if (!xor_srcs[src_idx]) {
while (src_idx--)
__free_page(xor_srcs[src_idx]);
return -ENOMEM;
}
}
dest = alloc_page(GFP_KERNEL);
if (!dest) {
while (src_idx--)
__free_page(xor_srcs[src_idx]);
return -ENOMEM;
}
/* Fill in src buffers */
for (src_idx = 0; src_idx < IOAT_NUM_SRC_TEST; src_idx++) {
u8 *ptr = page_address(xor_srcs[src_idx]);
for (i = 0; i < PAGE_SIZE; i++)
ptr[i] = (1 << src_idx);
}
for (src_idx = 0; src_idx < IOAT_NUM_SRC_TEST; src_idx++)
cmp_byte ^= (u8) (1 << src_idx);
cmp_word = (cmp_byte << 24) | (cmp_byte << 16) |
(cmp_byte << 8) | cmp_byte;
memset(page_address(dest), 0, PAGE_SIZE);
dma_chan = container_of(dma->channels.next, struct dma_chan,
device_node);
if (dma->device_alloc_chan_resources(dma_chan) < 1) {
err = -ENODEV;
goto out;
}
/* test xor */
op = IOAT_OP_XOR;
dest_dma = dma_map_page(dev, dest, 0, PAGE_SIZE, DMA_FROM_DEVICE);
if (dma_mapping_error(dev, dest_dma))
goto dma_unmap;
for (i = 0; i < IOAT_NUM_SRC_TEST; i++)
dma_srcs[i] = DMA_ERROR_CODE;
for (i = 0; i < IOAT_NUM_SRC_TEST; i++) {
dma_srcs[i] = dma_map_page(dev, xor_srcs[i], 0, PAGE_SIZE,
DMA_TO_DEVICE);
if (dma_mapping_error(dev, dma_srcs[i]))
goto dma_unmap;
}
tx = dma->device_prep_dma_xor(dma_chan, dest_dma, dma_srcs,
IOAT_NUM_SRC_TEST, PAGE_SIZE,
DMA_PREP_INTERRUPT);
if (!tx) {
dev_err(dev, "Self-test xor prep failed\n");
err = -ENODEV;
goto dma_unmap;
}
async_tx_ack(tx);
init_completion(&cmp);
tx->callback = ioat3_dma_test_callback;
tx->callback_param = &cmp;
cookie = tx->tx_submit(tx);
if (cookie < 0) {
dev_err(dev, "Self-test xor setup failed\n");
err = -ENODEV;
goto dma_unmap;
}
dma->device_issue_pending(dma_chan);
tmo = wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000));
if (tmo == 0 ||
dma->device_tx_status(dma_chan, cookie, NULL) != DMA_COMPLETE) {
dev_err(dev, "Self-test xor timed out\n");
err = -ENODEV;
goto dma_unmap;
}
for (i = 0; i < IOAT_NUM_SRC_TEST; i++)
dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE, DMA_TO_DEVICE);
dma_sync_single_for_cpu(dev, dest_dma, PAGE_SIZE, DMA_FROM_DEVICE);
for (i = 0; i < (PAGE_SIZE / sizeof(u32)); i++) {
u32 *ptr = page_address(dest);
if (ptr[i] != cmp_word) {
dev_err(dev, "Self-test xor failed compare\n");
err = -ENODEV;
goto free_resources;
}
}
dma_sync_single_for_device(dev, dest_dma, PAGE_SIZE, DMA_FROM_DEVICE);
dma_unmap_page(dev, dest_dma, PAGE_SIZE, DMA_FROM_DEVICE);
/* skip validate if the capability is not present */
if (!dma_has_cap(DMA_XOR_VAL, dma_chan->device->cap_mask))
goto free_resources;
op = IOAT_OP_XOR_VAL;
/* validate the sources with the destintation page */
for (i = 0; i < IOAT_NUM_SRC_TEST; i++)
xor_val_srcs[i] = xor_srcs[i];
xor_val_srcs[i] = dest;
xor_val_result = 1;
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++)
dma_srcs[i] = DMA_ERROR_CODE;
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++) {
dma_srcs[i] = dma_map_page(dev, xor_val_srcs[i], 0, PAGE_SIZE,
DMA_TO_DEVICE);
if (dma_mapping_error(dev, dma_srcs[i]))
goto dma_unmap;
}
tx = dma->device_prep_dma_xor_val(dma_chan, dma_srcs,
IOAT_NUM_SRC_TEST + 1, PAGE_SIZE,
&xor_val_result, DMA_PREP_INTERRUPT);
if (!tx) {
dev_err(dev, "Self-test zero prep failed\n");
err = -ENODEV;
goto dma_unmap;
}
async_tx_ack(tx);
init_completion(&cmp);
tx->callback = ioat3_dma_test_callback;
tx->callback_param = &cmp;
cookie = tx->tx_submit(tx);
if (cookie < 0) {
dev_err(dev, "Self-test zero setup failed\n");
err = -ENODEV;
goto dma_unmap;
}
dma->device_issue_pending(dma_chan);
tmo = wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000));
if (tmo == 0 ||
dma->device_tx_status(dma_chan, cookie, NULL) != DMA_COMPLETE) {
dev_err(dev, "Self-test validate timed out\n");
err = -ENODEV;
goto dma_unmap;
}
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++)
dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE, DMA_TO_DEVICE);
if (xor_val_result != 0) {
dev_err(dev, "Self-test validate failed compare\n");
err = -ENODEV;
goto free_resources;
}
memset(page_address(dest), 0, PAGE_SIZE);
/* test for non-zero parity sum */
op = IOAT_OP_XOR_VAL;
xor_val_result = 0;
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++)
dma_srcs[i] = DMA_ERROR_CODE;
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++) {
dma_srcs[i] = dma_map_page(dev, xor_val_srcs[i], 0, PAGE_SIZE,
DMA_TO_DEVICE);
if (dma_mapping_error(dev, dma_srcs[i]))
goto dma_unmap;
}
tx = dma->device_prep_dma_xor_val(dma_chan, dma_srcs,
IOAT_NUM_SRC_TEST + 1, PAGE_SIZE,
&xor_val_result, DMA_PREP_INTERRUPT);
if (!tx) {
dev_err(dev, "Self-test 2nd zero prep failed\n");
err = -ENODEV;
goto dma_unmap;
}
async_tx_ack(tx);
init_completion(&cmp);
tx->callback = ioat3_dma_test_callback;
tx->callback_param = &cmp;
cookie = tx->tx_submit(tx);
if (cookie < 0) {
dev_err(dev, "Self-test 2nd zero setup failed\n");
err = -ENODEV;
goto dma_unmap;
}
dma->device_issue_pending(dma_chan);
tmo = wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000));
if (tmo == 0 ||
dma->device_tx_status(dma_chan, cookie, NULL) != DMA_COMPLETE) {
dev_err(dev, "Self-test 2nd validate timed out\n");
err = -ENODEV;
goto dma_unmap;
}
if (xor_val_result != SUM_CHECK_P_RESULT) {
dev_err(dev, "Self-test validate failed compare\n");
err = -ENODEV;
goto dma_unmap;
}
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++)
dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE, DMA_TO_DEVICE);
goto free_resources;
dma_unmap:
if (op == IOAT_OP_XOR) {
if (dest_dma != DMA_ERROR_CODE)
dma_unmap_page(dev, dest_dma, PAGE_SIZE,
DMA_FROM_DEVICE);
for (i = 0; i < IOAT_NUM_SRC_TEST; i++)
if (dma_srcs[i] != DMA_ERROR_CODE)
dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE,
DMA_TO_DEVICE);
} else if (op == IOAT_OP_XOR_VAL) {
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++)
if (dma_srcs[i] != DMA_ERROR_CODE)
dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE,
DMA_TO_DEVICE);
}
free_resources:
dma->device_free_chan_resources(dma_chan);
out:
src_idx = IOAT_NUM_SRC_TEST;
while (src_idx--)
__free_page(xor_srcs[src_idx]);
__free_page(dest);
return err;
}
static int ioat3_dma_self_test(struct ioatdma_device *ioat_dma)
{
int rc = ioat_dma_self_test(ioat_dma);
if (rc)
return rc;
rc = ioat_xor_val_self_test(ioat_dma);
if (rc)
return rc;
return 0;
}
static int ioat3_irq_reinit(struct ioatdma_device *ioat_dma)
{
struct pci_dev *pdev = ioat_dma->pdev;
......@@ -1521,7 +1114,7 @@ static int ioat3_irq_reinit(struct ioatdma_device *ioat_dma)
return ioat_dma_setup_interrupts(ioat_dma);
}
static int ioat3_reset_hw(struct ioatdma_chan *ioat_chan)
int ioat_reset_hw(struct ioatdma_chan *ioat_chan)
{
/* throw away whatever the channel was doing and get it
* initialized, with ioat3 specific workarounds
......@@ -1569,148 +1162,3 @@ static int ioat3_reset_hw(struct ioatdma_chan *ioat_chan)
return err;
}
static void ioat3_intr_quirk(struct ioatdma_device *ioat_dma)
{
struct dma_device *dma;
struct dma_chan *c;
struct ioatdma_chan *ioat_chan;
u32 errmask;
dma = &ioat_dma->dma_dev;
/*
* if we have descriptor write back error status, we mask the
* error interrupts
*/
if (ioat_dma->cap & IOAT_CAP_DWBES) {
list_for_each_entry(c, &dma->channels, device_node) {
ioat_chan = to_ioat_chan(c);
errmask = readl(ioat_chan->reg_base +
IOAT_CHANERR_MASK_OFFSET);
errmask |= IOAT_CHANERR_XOR_P_OR_CRC_ERR |
IOAT_CHANERR_XOR_Q_ERR;
writel(errmask, ioat_chan->reg_base +
IOAT_CHANERR_MASK_OFFSET);
}
}
}
int ioat3_dma_probe(struct ioatdma_device *ioat_dma, int dca)
{
struct pci_dev *pdev = ioat_dma->pdev;
int dca_en = system_has_dca_enabled(pdev);
struct dma_device *dma;
struct dma_chan *c;
struct ioatdma_chan *ioat_chan;
bool is_raid_device = false;
int err;
ioat_dma->enumerate_channels = ioat_enumerate_channels;
ioat_dma->reset_hw = ioat3_reset_hw;
ioat_dma->self_test = ioat3_dma_self_test;
ioat_dma->intr_quirk = ioat3_intr_quirk;
dma = &ioat_dma->dma_dev;
dma->device_prep_dma_memcpy = ioat_dma_prep_memcpy_lock;
dma->device_issue_pending = ioat_issue_pending;
dma->device_alloc_chan_resources = ioat_alloc_chan_resources;
dma->device_free_chan_resources = ioat_free_chan_resources;
dma_cap_set(DMA_INTERRUPT, dma->cap_mask);
dma->device_prep_dma_interrupt = ioat3_prep_interrupt_lock;
ioat_dma->cap = readl(ioat_dma->reg_base + IOAT_DMA_CAP_OFFSET);
if (is_xeon_cb32(pdev) || is_bwd_noraid(pdev))
ioat_dma->cap &=
~(IOAT_CAP_XOR | IOAT_CAP_PQ | IOAT_CAP_RAID16SS);
/* dca is incompatible with raid operations */
if (dca_en && (ioat_dma->cap & (IOAT_CAP_XOR|IOAT_CAP_PQ)))
ioat_dma->cap &= ~(IOAT_CAP_XOR|IOAT_CAP_PQ);
if (ioat_dma->cap & IOAT_CAP_XOR) {
is_raid_device = true;
dma->max_xor = 8;
dma_cap_set(DMA_XOR, dma->cap_mask);
dma->device_prep_dma_xor = ioat3_prep_xor;
dma_cap_set(DMA_XOR_VAL, dma->cap_mask);
dma->device_prep_dma_xor_val = ioat3_prep_xor_val;
}
if (ioat_dma->cap & IOAT_CAP_PQ) {
is_raid_device = true;
dma->device_prep_dma_pq = ioat3_prep_pq;
dma->device_prep_dma_pq_val = ioat3_prep_pq_val;
dma_cap_set(DMA_PQ, dma->cap_mask);
dma_cap_set(DMA_PQ_VAL, dma->cap_mask);
if (ioat_dma->cap & IOAT_CAP_RAID16SS) {
dma_set_maxpq(dma, 16, 0);
} else {
dma_set_maxpq(dma, 8, 0);
}
if (!(ioat_dma->cap & IOAT_CAP_XOR)) {
dma->device_prep_dma_xor = ioat3_prep_pqxor;
dma->device_prep_dma_xor_val = ioat3_prep_pqxor_val;
dma_cap_set(DMA_XOR, dma->cap_mask);
dma_cap_set(DMA_XOR_VAL, dma->cap_mask);
if (ioat_dma->cap & IOAT_CAP_RAID16SS) {
dma->max_xor = 16;
} else {
dma->max_xor = 8;
}
}
}
dma->device_tx_status = ioat3_tx_status;
ioat_dma->cleanup_fn = ioat3_cleanup_event;
ioat_dma->timer_fn = ioat3_timer_event;
/* starting with CB3.3 super extended descriptors are supported */
if (ioat_dma->cap & IOAT_CAP_RAID16SS) {
char pool_name[14];
int i;
for (i = 0; i < MAX_SED_POOLS; i++) {
snprintf(pool_name, 14, "ioat_hw%d_sed", i);
/* allocate SED DMA pool */
ioat_dma->sed_hw_pool[i] = dmam_pool_create(pool_name,
&pdev->dev,
SED_SIZE * (i + 1), 64, 0);
if (!ioat_dma->sed_hw_pool[i])
return -ENOMEM;
}
}
if (!(ioat_dma->cap & (IOAT_CAP_XOR | IOAT_CAP_PQ)))
dma_cap_set(DMA_PRIVATE, dma->cap_mask);
err = ioat_probe(ioat_dma);
if (err)
return err;
list_for_each_entry(c, &dma->channels, device_node) {
ioat_chan = to_ioat_chan(c);
writel(IOAT_DMA_DCA_ANY_CPU,
ioat_chan->reg_base + IOAT_DCACTRL_OFFSET);
}
err = ioat_register(ioat_dma);
if (err)
return err;
ioat_kobject_add(ioat_dma, &ioat_ktype);
if (dca)
ioat_dma->dca = ioat3_dca_init(pdev, ioat_dma->reg_base);
return 0;
}
drivers/dma/ioat/init.c 0 → 100644
View file @ c0f28ce6
/*
* Intel I/OAT DMA Linux driver
* Copyright(c) 2004 - 2015 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/dmaengine.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/workqueue.h>
#include <linux/prefetch.h>
#include <linux/dca.h>
#include "dma.h"
#include "registers.h"
#include "hw.h"
#include "../dmaengine.h"
MODULE_VERSION(IOAT_DMA_VERSION);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Intel Corporation");
static struct pci_device_id ioat_pci_tbl[] = {
/* I/OAT v3 platforms */
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG0) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG1) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG2) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG3) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG4) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG5) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG6) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG7) },
/* I/OAT v3.2 platforms */
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF0) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF1) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF2) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF3) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF4) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF5) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF6) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF7) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF8) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF9) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB0) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB1) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB2) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB3) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB4) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB5) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB6) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB7) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB8) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB9) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB0) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB1) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB2) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB3) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB4) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB5) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB6) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB7) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB8) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB9) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW0) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW1) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW2) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW3) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW4) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW5) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW6) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW7) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW8) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW9) },
/* I/OAT v3.3 platforms */
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD0) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD1) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD2) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD3) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE0) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE1) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE2) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE3) },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, ioat_pci_tbl);
static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id);
static void ioat_remove(struct pci_dev *pdev);
static int ioat_dca_enabled = 1;
module_param(ioat_dca_enabled, int, 0644);
MODULE_PARM_DESC(ioat_dca_enabled, "control support of dca service (default: 1)");
int ioat_pending_level = 4;
module_param(ioat_pending_level, int, 0644);
MODULE_PARM_DESC(ioat_pending_level,
"high-water mark for pushing ioat descriptors (default: 4)");
int ioat_ring_alloc_order = 8;
module_param(ioat_ring_alloc_order, int, 0644);
MODULE_PARM_DESC(ioat_ring_alloc_order,
"ioat+: allocate 2^n descriptors per channel (default: 8 max: 16)");
int ioat_ring_max_alloc_order = IOAT_MAX_ORDER;
module_param(ioat_ring_max_alloc_order, int, 0644);
MODULE_PARM_DESC(ioat_ring_max_alloc_order,
"ioat+: upper limit for ring size (default: 16)");
static char ioat_interrupt_style[32] = "msix";
module_param_string(ioat_interrupt_style, ioat_interrupt_style,
sizeof(ioat_interrupt_style), 0644);
MODULE_PARM_DESC(ioat_interrupt_style,
"set ioat interrupt style: msix (default), msi, intx");
struct kmem_cache *ioat_cache;
struct kmem_cache *ioat_sed_cache;
static bool is_jf_ioat(struct pci_dev *pdev)
{
switch (pdev->device) {
case PCI_DEVICE_ID_INTEL_IOAT_JSF0:
case PCI_DEVICE_ID_INTEL_IOAT_JSF1:
case PCI_DEVICE_ID_INTEL_IOAT_JSF2:
case PCI_DEVICE_ID_INTEL_IOAT_JSF3:
case PCI_DEVICE_ID_INTEL_IOAT_JSF4:
case PCI_DEVICE_ID_INTEL_IOAT_JSF5:
case PCI_DEVICE_ID_INTEL_IOAT_JSF6:
case PCI_DEVICE_ID_INTEL_IOAT_JSF7:
case PCI_DEVICE_ID_INTEL_IOAT_JSF8:
case PCI_DEVICE_ID_INTEL_IOAT_JSF9:
return true;
default:
return false;
}
}
static bool is_snb_ioat(struct pci_dev *pdev)
{
switch (pdev->device) {
case PCI_DEVICE_ID_INTEL_IOAT_SNB0:
case PCI_DEVICE_ID_INTEL_IOAT_SNB1:
case PCI_DEVICE_ID_INTEL_IOAT_SNB2:
case PCI_DEVICE_ID_INTEL_IOAT_SNB3:
case PCI_DEVICE_ID_INTEL_IOAT_SNB4:
case PCI_DEVICE_ID_INTEL_IOAT_SNB5:
case PCI_DEVICE_ID_INTEL_IOAT_SNB6:
case PCI_DEVICE_ID_INTEL_IOAT_SNB7:
case PCI_DEVICE_ID_INTEL_IOAT_SNB8:
case PCI_DEVICE_ID_INTEL_IOAT_SNB9:
return true;
default:
return false;
}
}
static bool is_ivb_ioat(struct pci_dev *pdev)
{
switch (pdev->device) {
case PCI_DEVICE_ID_INTEL_IOAT_IVB0:
case PCI_DEVICE_ID_INTEL_IOAT_IVB1:
case PCI_DEVICE_ID_INTEL_IOAT_IVB2:
case PCI_DEVICE_ID_INTEL_IOAT_IVB3:
case PCI_DEVICE_ID_INTEL_IOAT_IVB4:
case PCI_DEVICE_ID_INTEL_IOAT_IVB5:
case PCI_DEVICE_ID_INTEL_IOAT_IVB6:
case PCI_DEVICE_ID_INTEL_IOAT_IVB7:
case PCI_DEVICE_ID_INTEL_IOAT_IVB8:
case PCI_DEVICE_ID_INTEL_IOAT_IVB9:
return true;
default:
return false;
}
}
static bool is_hsw_ioat(struct pci_dev *pdev)
{
switch (pdev->device) {
case PCI_DEVICE_ID_INTEL_IOAT_HSW0:
case PCI_DEVICE_ID_INTEL_IOAT_HSW1:
case PCI_DEVICE_ID_INTEL_IOAT_HSW2:
case PCI_DEVICE_ID_INTEL_IOAT_HSW3:
case PCI_DEVICE_ID_INTEL_IOAT_HSW4:
case PCI_DEVICE_ID_INTEL_IOAT_HSW5:
case PCI_DEVICE_ID_INTEL_IOAT_HSW6:
case PCI_DEVICE_ID_INTEL_IOAT_HSW7:
case PCI_DEVICE_ID_INTEL_IOAT_HSW8:
case PCI_DEVICE_ID_INTEL_IOAT_HSW9:
return true;
default:
return false;
}
}
static bool is_xeon_cb32(struct pci_dev *pdev)
{
return is_jf_ioat(pdev) || is_snb_ioat(pdev) || is_ivb_ioat(pdev) ||
is_hsw_ioat(pdev);
}
bool is_bwd_ioat(struct pci_dev *pdev)
{
switch (pdev->device) {
case PCI_DEVICE_ID_INTEL_IOAT_BWD0:
case PCI_DEVICE_ID_INTEL_IOAT_BWD1:
case PCI_DEVICE_ID_INTEL_IOAT_BWD2:
case PCI_DEVICE_ID_INTEL_IOAT_BWD3:
/* even though not Atom, BDX-DE has same DMA silicon */
case PCI_DEVICE_ID_INTEL_IOAT_BDXDE0:
case PCI_DEVICE_ID_INTEL_IOAT_BDXDE1:
case PCI_DEVICE_ID_INTEL_IOAT_BDXDE2:
case PCI_DEVICE_ID_INTEL_IOAT_BDXDE3:
return true;
default:
return false;
}
}
static bool is_bwd_noraid(struct pci_dev *pdev)
{
switch (pdev->device) {
case PCI_DEVICE_ID_INTEL_IOAT_BWD2:
case PCI_DEVICE_ID_INTEL_IOAT_BWD3:
case PCI_DEVICE_ID_INTEL_IOAT_BDXDE0:
case PCI_DEVICE_ID_INTEL_IOAT_BDXDE1:
case PCI_DEVICE_ID_INTEL_IOAT_BDXDE2:
case PCI_DEVICE_ID_INTEL_IOAT_BDXDE3:
return true;
default:
return false;
}
}
/*
* Perform a IOAT transaction to verify the HW works.
*/
#define IOAT_TEST_SIZE 2000
static void ioat_dma_test_callback(void *dma_async_param)
{
struct completion *cmp = dma_async_param;
complete(cmp);
}
/**
* ioat_dma_self_test - Perform a IOAT transaction to verify the HW works.
* @ioat_dma: dma device to be tested
*/
int ioat_dma_self_test(struct ioatdma_device *ioat_dma)
{
int i;
u8 *src;
u8 *dest;
struct dma_device *dma = &ioat_dma->dma_dev;
struct device *dev = &ioat_dma->pdev->dev;
struct dma_chan *dma_chan;
struct dma_async_tx_descriptor *tx;
dma_addr_t dma_dest, dma_src;
dma_cookie_t cookie;
int err = 0;
struct completion cmp;
unsigned long tmo;
unsigned long flags;
src = kzalloc(sizeof(u8) * IOAT_TEST_SIZE, GFP_KERNEL);
if (!src)
return -ENOMEM;
dest = kzalloc(sizeof(u8) * IOAT_TEST_SIZE, GFP_KERNEL);
if (!dest) {
kfree(src);
return -ENOMEM;
}
/* Fill in src buffer */
for (i = 0; i < IOAT_TEST_SIZE; i++)
src[i] = (u8)i;
/* Start copy, using first DMA channel */
dma_chan = container_of(dma->channels.next, struct dma_chan,
device_node);
if (dma->device_alloc_chan_resources(dma_chan) < 1) {
dev_err(dev, "selftest cannot allocate chan resource\n");
err = -ENODEV;
goto out;
}
dma_src = dma_map_single(dev, src, IOAT_TEST_SIZE, DMA_TO_DEVICE);
if (dma_mapping_error(dev, dma_src)) {
dev_err(dev, "mapping src buffer failed\n");
goto free_resources;
}
dma_dest = dma_map_single(dev, dest, IOAT_TEST_SIZE, DMA_FROM_DEVICE);
if (dma_mapping_error(dev, dma_dest)) {
dev_err(dev, "mapping dest buffer failed\n");
goto unmap_src;
}
flags = DMA_PREP_INTERRUPT;
tx = ioat_dma->dma_dev.device_prep_dma_memcpy(dma_chan, dma_dest,
dma_src, IOAT_TEST_SIZE,
flags);
if (!tx) {
dev_err(dev, "Self-test prep failed, disabling\n");
err = -ENODEV;
goto unmap_dma;
}
async_tx_ack(tx);
init_completion(&cmp);
tx->callback = ioat_dma_test_callback;
tx->callback_param = &cmp;
cookie = tx->tx_submit(tx);
if (cookie < 0) {
dev_err(dev, "Self-test setup failed, disabling\n");
err = -ENODEV;
goto unmap_dma;
}
dma->device_issue_pending(dma_chan);
tmo = wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000));
if (tmo == 0 ||
dma->device_tx_status(dma_chan, cookie, NULL)
!= DMA_COMPLETE) {
dev_err(dev, "Self-test copy timed out, disabling\n");
err = -ENODEV;
goto unmap_dma;
}
if (memcmp(src, dest, IOAT_TEST_SIZE)) {
dev_err(dev, "Self-test copy failed compare, disabling\n");
err = -ENODEV;
goto free_resources;
}
unmap_dma:
dma_unmap_single(dev, dma_dest, IOAT_TEST_SIZE, DMA_FROM_DEVICE);
unmap_src:
dma_unmap_single(dev, dma_src, IOAT_TEST_SIZE, DMA_TO_DEVICE);
free_resources:
dma->device_free_chan_resources(dma_chan);
out:
kfree(src);
kfree(dest);
return err;
}
/**
* ioat_dma_setup_interrupts - setup interrupt handler
* @ioat_dma: ioat dma device
*/
int ioat_dma_setup_interrupts(struct ioatdma_device *ioat_dma)
{
struct ioatdma_chan *ioat_chan;
struct pci_dev *pdev = ioat_dma->pdev;
struct device *dev = &pdev->dev;
struct msix_entry *msix;
int i, j, msixcnt;
int err = -EINVAL;
u8 intrctrl = 0;
if (!strcmp(ioat_interrupt_style, "msix"))
goto msix;
if (!strcmp(ioat_interrupt_style, "msi"))
goto msi;
if (!strcmp(ioat_interrupt_style, "intx"))
goto intx;
dev_err(dev, "invalid ioat_interrupt_style %s\n", ioat_interrupt_style);
goto err_no_irq;
msix:
/* The number of MSI-X vectors should equal the number of channels */
msixcnt = ioat_dma->dma_dev.chancnt;
for (i = 0; i < msixcnt; i++)
ioat_dma->msix_entries[i].entry = i;
err = pci_enable_msix_exact(pdev, ioat_dma->msix_entries, msixcnt);
if (err)
goto msi;
for (i = 0; i < msixcnt; i++) {
msix = &ioat_dma->msix_entries[i];
ioat_chan = ioat_chan_by_index(ioat_dma, i);
err = devm_request_irq(dev, msix->vector,
ioat_dma_do_interrupt_msix, 0,
"ioat-msix", ioat_chan);
if (err) {
for (j = 0; j < i; j++) {
msix = &ioat_dma->msix_entries[j];
ioat_chan = ioat_chan_by_index(ioat_dma, j);
devm_free_irq(dev, msix->vector, ioat_chan);
}
goto msi;
}
}
intrctrl |= IOAT_INTRCTRL_MSIX_VECTOR_CONTROL;
ioat_dma->irq_mode = IOAT_MSIX;
goto done;
msi:
err = pci_enable_msi(pdev);
if (err)
goto intx;
err = devm_request_irq(dev, pdev->irq, ioat_dma_do_interrupt, 0,
"ioat-msi", ioat_dma);
if (err) {
pci_disable_msi(pdev);
goto intx;
}
ioat_dma->irq_mode = IOAT_MSI;
goto done;
intx:
err = devm_request_irq(dev, pdev->irq, ioat_dma_do_interrupt,
IRQF_SHARED, "ioat-intx", ioat_dma);
if (err)
goto err_no_irq;
ioat_dma->irq_mode = IOAT_INTX;
done:
if (ioat_dma->intr_quirk)
ioat_dma->intr_quirk(ioat_dma);
intrctrl |= IOAT_INTRCTRL_MASTER_INT_EN;
writeb(intrctrl, ioat_dma->reg_base + IOAT_INTRCTRL_OFFSET);
return 0;
err_no_irq:
/* Disable all interrupt generation */
writeb(0, ioat_dma->reg_base + IOAT_INTRCTRL_OFFSET);
ioat_dma->irq_mode = IOAT_NOIRQ;
dev_err(dev, "no usable interrupts\n");
return err;
}
EXPORT_SYMBOL(ioat_dma_setup_interrupts);
static void ioat_disable_interrupts(struct ioatdma_device *ioat_dma)
{
/* Disable all interrupt generation */
writeb(0, ioat_dma->reg_base + IOAT_INTRCTRL_OFFSET);
}
int ioat_probe(struct ioatdma_device *ioat_dma)
{
int err = -ENODEV;
struct dma_device *dma = &ioat_dma->dma_dev;
struct pci_dev *pdev = ioat_dma->pdev;
struct device *dev = &pdev->dev;
/* DMA coherent memory pool for DMA descriptor allocations */
ioat_dma->dma_pool = pci_pool_create("dma_desc_pool", pdev,
sizeof(struct ioat_dma_descriptor),
64, 0);
if (!ioat_dma->dma_pool) {
err = -ENOMEM;
goto err_dma_pool;
}
ioat_dma->completion_pool = pci_pool_create("completion_pool", pdev,
sizeof(u64),
SMP_CACHE_BYTES,
SMP_CACHE_BYTES);
if (!ioat_dma->completion_pool) {
err = -ENOMEM;
goto err_completion_pool;
}
ioat_dma->enumerate_channels(ioat_dma);
dma_cap_set(DMA_MEMCPY, dma->cap_mask);
dma->dev = &pdev->dev;
if (!dma->chancnt) {
dev_err(dev, "channel enumeration error\n");
goto err_setup_interrupts;
}
err = ioat_dma_setup_interrupts(ioat_dma);
if (err)
goto err_setup_interrupts;
err = ioat_dma->self_test(ioat_dma);
if (err)
goto err_self_test;
return 0;
err_self_test:
ioat_disable_interrupts(ioat_dma);
err_setup_interrupts:
pci_pool_destroy(ioat_dma->completion_pool);
err_completion_pool:
pci_pool_destroy(ioat_dma->dma_pool);
err_dma_pool:
return err;
}
int ioat_register(struct ioatdma_device *ioat_dma)
{
int err = dma_async_device_register(&ioat_dma->dma_dev);
if (err) {
ioat_disable_interrupts(ioat_dma);
pci_pool_destroy(ioat_dma->completion_pool);
pci_pool_destroy(ioat_dma->dma_pool);
}
return err;
}
void ioat_dma_remove(struct ioatdma_device *ioat_dma)
{
struct dma_device *dma = &ioat_dma->dma_dev;
ioat_disable_interrupts(ioat_dma);
ioat_kobject_del(ioat_dma);
dma_async_device_unregister(dma);
pci_pool_destroy(ioat_dma->dma_pool);
pci_pool_destroy(ioat_dma->completion_pool);
INIT_LIST_HEAD(&dma->channels);
}
/**
* ioat_enumerate_channels - find and initialize the device's channels
* @ioat_dma: the ioat dma device to be enumerated
*/
int ioat_enumerate_channels(struct ioatdma_device *ioat_dma)
{
struct ioatdma_chan *ioat_chan;
struct device *dev = &ioat_dma->pdev->dev;
struct dma_device *dma = &ioat_dma->dma_dev;
u8 xfercap_log;
int i;
INIT_LIST_HEAD(&dma->channels);
dma->chancnt = readb(ioat_dma->reg_base + IOAT_CHANCNT_OFFSET);
dma->chancnt &= 0x1f; /* bits [4:0] valid */
if (dma->chancnt > ARRAY_SIZE(ioat_dma->idx)) {
dev_warn(dev, "(%d) exceeds max supported channels (%zu)\n",
dma->chancnt, ARRAY_SIZE(ioat_dma->idx));
dma->chancnt = ARRAY_SIZE(ioat_dma->idx);
}
xfercap_log = readb(ioat_dma->reg_base + IOAT_XFERCAP_OFFSET);
xfercap_log &= 0x1f; /* bits [4:0] valid */
if (xfercap_log == 0)
return 0;
dev_dbg(dev, "%s: xfercap = %d\n", __func__, 1 << xfercap_log);
for (i = 0; i < dma->chancnt; i++) {
ioat_chan = devm_kzalloc(dev, sizeof(*ioat_chan), GFP_KERNEL);
if (!ioat_chan)
break;
ioat_init_channel(ioat_dma, ioat_chan, i);
ioat_chan->xfercap_log = xfercap_log;
spin_lock_init(&ioat_chan->prep_lock);
if (ioat_dma->reset_hw(ioat_chan)) {
i = 0;
break;
}
}
dma->chancnt = i;
return i;
}
/**
* ioat_free_chan_resources - release all the descriptors
* @chan: the channel to be cleaned
*/
void ioat_free_chan_resources(struct dma_chan *c)
{
struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
struct ioatdma_device *ioat_dma = ioat_chan->ioat_dma;
struct ioat_ring_ent *desc;
const int total_descs = 1 << ioat_chan->alloc_order;
int descs;
int i;
/* Before freeing channel resources first check
* if they have been previously allocated for this channel.
*/
if (!ioat_chan->ring)
return;
ioat_stop(ioat_chan);
ioat_dma->reset_hw(ioat_chan);
spin_lock_bh(&ioat_chan->cleanup_lock);
spin_lock_bh(&ioat_chan->prep_lock);
descs = ioat_ring_space(ioat_chan);
dev_dbg(to_dev(ioat_chan), "freeing %d idle descriptors\n", descs);
for (i = 0; i < descs; i++) {
desc = ioat_get_ring_ent(ioat_chan, ioat_chan->head + i);
ioat_free_ring_ent(desc, c);
}
if (descs < total_descs)
dev_err(to_dev(ioat_chan), "Freeing %d in use descriptors!\n",
total_descs - descs);
for (i = 0; i < total_descs - descs; i++) {
desc = ioat_get_ring_ent(ioat_chan, ioat_chan->tail + i);
dump_desc_dbg(ioat_chan, desc);
ioat_free_ring_ent(desc, c);
}
kfree(ioat_chan->ring);
ioat_chan->ring = NULL;
ioat_chan->alloc_order = 0;
pci_pool_free(ioat_dma->completion_pool, ioat_chan->completion,
ioat_chan->completion_dma);
spin_unlock_bh(&ioat_chan->prep_lock);
spin_unlock_bh(&ioat_chan->cleanup_lock);
ioat_chan->last_completion = 0;
ioat_chan->completion_dma = 0;
ioat_chan->dmacount = 0;
}
/* ioat_alloc_chan_resources - allocate/initialize ioat descriptor ring
* @chan: channel to be initialized
*/
int ioat_alloc_chan_resources(struct dma_chan *c)
{
struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
struct ioat_ring_ent **ring;
u64 status;
int order;
int i = 0;
u32 chanerr;
/* have we already been set up? */
if (ioat_chan->ring)
return 1 << ioat_chan->alloc_order;
/* Setup register to interrupt and write completion status on error */
writew(IOAT_CHANCTRL_RUN, ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET);
/* allocate a completion writeback area */
/* doing 2 32bit writes to mmio since 1 64b write doesn't work */
ioat_chan->completion =
pci_pool_alloc(ioat_chan->ioat_dma->completion_pool,
GFP_KERNEL, &ioat_chan->completion_dma);
if (!ioat_chan->completion)
return -ENOMEM;
memset(ioat_chan->completion, 0, sizeof(*ioat_chan->completion));
writel(((u64)ioat_chan->completion_dma) & 0x00000000FFFFFFFF,
ioat_chan->reg_base + IOAT_CHANCMP_OFFSET_LOW);
writel(((u64)ioat_chan->completion_dma) >> 32,
ioat_chan->reg_base + IOAT_CHANCMP_OFFSET_HIGH);
order = ioat_get_alloc_order();
ring = ioat_alloc_ring(c, order, GFP_KERNEL);
if (!ring)
return -ENOMEM;
spin_lock_bh(&ioat_chan->cleanup_lock);
spin_lock_bh(&ioat_chan->prep_lock);
ioat_chan->ring = ring;
ioat_chan->head = 0;
ioat_chan->issued = 0;
ioat_chan->tail = 0;
ioat_chan->alloc_order = order;
set_bit(IOAT_RUN, &ioat_chan->state);
spin_unlock_bh(&ioat_chan->prep_lock);
spin_unlock_bh(&ioat_chan->cleanup_lock);
ioat_start_null_desc(ioat_chan);
/* check that we got off the ground */
do {
udelay(1);
status = ioat_chansts(ioat_chan);
} while (i++ < 20 && !is_ioat_active(status) && !is_ioat_idle(status));
if (is_ioat_active(status) || is_ioat_idle(status))
return 1 << ioat_chan->alloc_order;
chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
dev_WARN(to_dev(ioat_chan),
"failed to start channel chanerr: %#x\n", chanerr);
ioat_free_chan_resources(c);
return -EFAULT;
}
/* common channel initialization */
void
ioat_init_channel(struct ioatdma_device *ioat_dma,
struct ioatdma_chan *ioat_chan, int idx)
{
struct dma_device *dma = &ioat_dma->dma_dev;
struct dma_chan *c = &ioat_chan->dma_chan;
unsigned long data = (unsigned long) c;
ioat_chan->ioat_dma = ioat_dma;
ioat_chan->reg_base = ioat_dma->reg_base + (0x80 * (idx + 1));
spin_lock_init(&ioat_chan->cleanup_lock);
ioat_chan->dma_chan.device = dma;
dma_cookie_init(&ioat_chan->dma_chan);
list_add_tail(&ioat_chan->dma_chan.device_node, &dma->channels);
ioat_dma->idx[idx] = ioat_chan;
init_timer(&ioat_chan->timer);
ioat_chan->timer.function = ioat_dma->timer_fn;
ioat_chan->timer.data = data;
tasklet_init(&ioat_chan->cleanup_task, ioat_dma->cleanup_fn, data);
}
static void ioat3_dma_test_callback(void *dma_async_param)
{
struct completion *cmp = dma_async_param;
complete(cmp);
}
#define IOAT_NUM_SRC_TEST 6 /* must be <= 8 */
static int ioat_xor_val_self_test(struct ioatdma_device *ioat_dma)
{
int i, src_idx;
struct page *dest;
struct page *xor_srcs[IOAT_NUM_SRC_TEST];
struct page *xor_val_srcs[IOAT_NUM_SRC_TEST + 1];
dma_addr_t dma_srcs[IOAT_NUM_SRC_TEST + 1];
dma_addr_t dest_dma;
struct dma_async_tx_descriptor *tx;
struct dma_chan *dma_chan;
dma_cookie_t cookie;
u8 cmp_byte = 0;
u32 cmp_word;
u32 xor_val_result;
int err = 0;
struct completion cmp;
unsigned long tmo;
struct device *dev = &ioat_dma->pdev->dev;
struct dma_device *dma = &ioat_dma->dma_dev;
u8 op = 0;
dev_dbg(dev, "%s\n", __func__);
if (!dma_has_cap(DMA_XOR, dma->cap_mask))
return 0;
for (src_idx = 0; src_idx < IOAT_NUM_SRC_TEST; src_idx++) {
xor_srcs[src_idx] = alloc_page(GFP_KERNEL);
if (!xor_srcs[src_idx]) {
while (src_idx--)
__free_page(xor_srcs[src_idx]);
return -ENOMEM;
}
}
dest = alloc_page(GFP_KERNEL);
if (!dest) {
while (src_idx--)
__free_page(xor_srcs[src_idx]);
return -ENOMEM;
}
/* Fill in src buffers */
for (src_idx = 0; src_idx < IOAT_NUM_SRC_TEST; src_idx++) {
u8 *ptr = page_address(xor_srcs[src_idx]);
for (i = 0; i < PAGE_SIZE; i++)
ptr[i] = (1 << src_idx);
}
for (src_idx = 0; src_idx < IOAT_NUM_SRC_TEST; src_idx++)
cmp_byte ^= (u8) (1 << src_idx);
cmp_word = (cmp_byte << 24) | (cmp_byte << 16) |
(cmp_byte << 8) | cmp_byte;
memset(page_address(dest), 0, PAGE_SIZE);
dma_chan = container_of(dma->channels.next, struct dma_chan,
device_node);
if (dma->device_alloc_chan_resources(dma_chan) < 1) {
err = -ENODEV;
goto out;
}
/* test xor */
op = IOAT_OP_XOR;
dest_dma = dma_map_page(dev, dest, 0, PAGE_SIZE, DMA_FROM_DEVICE);
if (dma_mapping_error(dev, dest_dma))
goto dma_unmap;
for (i = 0; i < IOAT_NUM_SRC_TEST; i++)
dma_srcs[i] = DMA_ERROR_CODE;
for (i = 0; i < IOAT_NUM_SRC_TEST; i++) {
dma_srcs[i] = dma_map_page(dev, xor_srcs[i], 0, PAGE_SIZE,
DMA_TO_DEVICE);
if (dma_mapping_error(dev, dma_srcs[i]))
goto dma_unmap;
}
tx = dma->device_prep_dma_xor(dma_chan, dest_dma, dma_srcs,
IOAT_NUM_SRC_TEST, PAGE_SIZE,
DMA_PREP_INTERRUPT);
if (!tx) {
dev_err(dev, "Self-test xor prep failed\n");
err = -ENODEV;
goto dma_unmap;
}
async_tx_ack(tx);
init_completion(&cmp);
tx->callback = ioat3_dma_test_callback;
tx->callback_param = &cmp;
cookie = tx->tx_submit(tx);
if (cookie < 0) {
dev_err(dev, "Self-test xor setup failed\n");
err = -ENODEV;
goto dma_unmap;
}
dma->device_issue_pending(dma_chan);
tmo = wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000));
if (tmo == 0 ||
dma->device_tx_status(dma_chan, cookie, NULL) != DMA_COMPLETE) {
dev_err(dev, "Self-test xor timed out\n");
err = -ENODEV;
goto dma_unmap;
}
for (i = 0; i < IOAT_NUM_SRC_TEST; i++)
dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE, DMA_TO_DEVICE);
dma_sync_single_for_cpu(dev, dest_dma, PAGE_SIZE, DMA_FROM_DEVICE);
for (i = 0; i < (PAGE_SIZE / sizeof(u32)); i++) {
u32 *ptr = page_address(dest);
if (ptr[i] != cmp_word) {
dev_err(dev, "Self-test xor failed compare\n");
err = -ENODEV;
goto free_resources;
}
}
dma_sync_single_for_device(dev, dest_dma, PAGE_SIZE, DMA_FROM_DEVICE);
dma_unmap_page(dev, dest_dma, PAGE_SIZE, DMA_FROM_DEVICE);
/* skip validate if the capability is not present */
if (!dma_has_cap(DMA_XOR_VAL, dma_chan->device->cap_mask))
goto free_resources;
op = IOAT_OP_XOR_VAL;
/* validate the sources with the destintation page */
for (i = 0; i < IOAT_NUM_SRC_TEST; i++)
xor_val_srcs[i] = xor_srcs[i];
xor_val_srcs[i] = dest;
xor_val_result = 1;
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++)
dma_srcs[i] = DMA_ERROR_CODE;
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++) {
dma_srcs[i] = dma_map_page(dev, xor_val_srcs[i], 0, PAGE_SIZE,
DMA_TO_DEVICE);
if (dma_mapping_error(dev, dma_srcs[i]))
goto dma_unmap;
}
tx = dma->device_prep_dma_xor_val(dma_chan, dma_srcs,
IOAT_NUM_SRC_TEST + 1, PAGE_SIZE,
&xor_val_result, DMA_PREP_INTERRUPT);
if (!tx) {
dev_err(dev, "Self-test zero prep failed\n");
err = -ENODEV;
goto dma_unmap;
}
async_tx_ack(tx);
init_completion(&cmp);
tx->callback = ioat3_dma_test_callback;
tx->callback_param = &cmp;
cookie = tx->tx_submit(tx);
if (cookie < 0) {
dev_err(dev, "Self-test zero setup failed\n");
err = -ENODEV;
goto dma_unmap;
}
dma->device_issue_pending(dma_chan);
tmo = wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000));
if (tmo == 0 ||
dma->device_tx_status(dma_chan, cookie, NULL) != DMA_COMPLETE) {
dev_err(dev, "Self-test validate timed out\n");
err = -ENODEV;
goto dma_unmap;
}
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++)
dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE, DMA_TO_DEVICE);
if (xor_val_result != 0) {
dev_err(dev, "Self-test validate failed compare\n");
err = -ENODEV;
goto free_resources;
}
memset(page_address(dest), 0, PAGE_SIZE);
/* test for non-zero parity sum */
op = IOAT_OP_XOR_VAL;
xor_val_result = 0;
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++)
dma_srcs[i] = DMA_ERROR_CODE;
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++) {
dma_srcs[i] = dma_map_page(dev, xor_val_srcs[i], 0, PAGE_SIZE,
DMA_TO_DEVICE);
if (dma_mapping_error(dev, dma_srcs[i]))
goto dma_unmap;
}
tx = dma->device_prep_dma_xor_val(dma_chan, dma_srcs,
IOAT_NUM_SRC_TEST + 1, PAGE_SIZE,
&xor_val_result, DMA_PREP_INTERRUPT);
if (!tx) {
dev_err(dev, "Self-test 2nd zero prep failed\n");
err = -ENODEV;
goto dma_unmap;
}
async_tx_ack(tx);
init_completion(&cmp);
tx->callback = ioat3_dma_test_callback;
tx->callback_param = &cmp;
cookie = tx->tx_submit(tx);
if (cookie < 0) {
dev_err(dev, "Self-test 2nd zero setup failed\n");
err = -ENODEV;
goto dma_unmap;
}
dma->device_issue_pending(dma_chan);
tmo = wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000));
if (tmo == 0 ||
dma->device_tx_status(dma_chan, cookie, NULL) != DMA_COMPLETE) {
dev_err(dev, "Self-test 2nd validate timed out\n");
err = -ENODEV;
goto dma_unmap;
}
if (xor_val_result != SUM_CHECK_P_RESULT) {
dev_err(dev, "Self-test validate failed compare\n");
err = -ENODEV;
goto dma_unmap;
}
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++)
dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE, DMA_TO_DEVICE);
goto free_resources;
dma_unmap:
if (op == IOAT_OP_XOR) {
if (dest_dma != DMA_ERROR_CODE)
dma_unmap_page(dev, dest_dma, PAGE_SIZE,
DMA_FROM_DEVICE);
for (i = 0; i < IOAT_NUM_SRC_TEST; i++)
if (dma_srcs[i] != DMA_ERROR_CODE)
dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE,
DMA_TO_DEVICE);
} else if (op == IOAT_OP_XOR_VAL) {
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++)
if (dma_srcs[i] != DMA_ERROR_CODE)
dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE,
DMA_TO_DEVICE);
}
free_resources:
dma->device_free_chan_resources(dma_chan);
out:
src_idx = IOAT_NUM_SRC_TEST;
while (src_idx--)
__free_page(xor_srcs[src_idx]);
__free_page(dest);
return err;
}
static int ioat3_dma_self_test(struct ioatdma_device *ioat_dma)
{
int rc = ioat_dma_self_test(ioat_dma);
if (rc)
return rc;
rc = ioat_xor_val_self_test(ioat_dma);
if (rc)
return rc;
return 0;
}
static void ioat3_intr_quirk(struct ioatdma_device *ioat_dma)
{
struct dma_device *dma;
struct dma_chan *c;
struct ioatdma_chan *ioat_chan;
u32 errmask;
dma = &ioat_dma->dma_dev;
/*
* if we have descriptor write back error status, we mask the
* error interrupts
*/
if (ioat_dma->cap & IOAT_CAP_DWBES) {
list_for_each_entry(c, &dma->channels, device_node) {
ioat_chan = to_ioat_chan(c);
errmask = readl(ioat_chan->reg_base +
IOAT_CHANERR_MASK_OFFSET);
errmask |= IOAT_CHANERR_XOR_P_OR_CRC_ERR |
IOAT_CHANERR_XOR_Q_ERR;
writel(errmask, ioat_chan->reg_base +
IOAT_CHANERR_MASK_OFFSET);
}
}
}
int ioat3_dma_probe(struct ioatdma_device *ioat_dma, int dca)
{
struct pci_dev *pdev = ioat_dma->pdev;
int dca_en = system_has_dca_enabled(pdev);
struct dma_device *dma;
struct dma_chan *c;
struct ioatdma_chan *ioat_chan;
bool is_raid_device = false;
int err;
ioat_dma->enumerate_channels = ioat_enumerate_channels;
ioat_dma->reset_hw = ioat_reset_hw;
ioat_dma->self_test = ioat3_dma_self_test;
ioat_dma->intr_quirk = ioat3_intr_quirk;
dma = &ioat_dma->dma_dev;
dma->device_prep_dma_memcpy = ioat_dma_prep_memcpy_lock;
dma->device_issue_pending = ioat_issue_pending;
dma->device_alloc_chan_resources = ioat_alloc_chan_resources;
dma->device_free_chan_resources = ioat_free_chan_resources;
dma_cap_set(DMA_INTERRUPT, dma->cap_mask);
dma->device_prep_dma_interrupt = ioat_prep_interrupt_lock;
ioat_dma->cap = readl(ioat_dma->reg_base + IOAT_DMA_CAP_OFFSET);
if (is_xeon_cb32(pdev) || is_bwd_noraid(pdev))
ioat_dma->cap &=
~(IOAT_CAP_XOR | IOAT_CAP_PQ | IOAT_CAP_RAID16SS);
/* dca is incompatible with raid operations */
if (dca_en && (ioat_dma->cap & (IOAT_CAP_XOR|IOAT_CAP_PQ)))
ioat_dma->cap &= ~(IOAT_CAP_XOR|IOAT_CAP_PQ);
if (ioat_dma->cap & IOAT_CAP_XOR) {
is_raid_device = true;
dma->max_xor = 8;
dma_cap_set(DMA_XOR, dma->cap_mask);
dma->device_prep_dma_xor = ioat_prep_xor;
dma_cap_set(DMA_XOR_VAL, dma->cap_mask);
dma->device_prep_dma_xor_val = ioat_prep_xor_val;
}
if (ioat_dma->cap & IOAT_CAP_PQ) {
is_raid_device = true;
dma->device_prep_dma_pq = ioat_prep_pq;
dma->device_prep_dma_pq_val = ioat_prep_pq_val;
dma_cap_set(DMA_PQ, dma->cap_mask);
dma_cap_set(DMA_PQ_VAL, dma->cap_mask);
if (ioat_dma->cap & IOAT_CAP_RAID16SS)
dma_set_maxpq(dma, 16, 0);
else
dma_set_maxpq(dma, 8, 0);
if (!(ioat_dma->cap & IOAT_CAP_XOR)) {
dma->device_prep_dma_xor = ioat_prep_pqxor;
dma->device_prep_dma_xor_val = ioat_prep_pqxor_val;
dma_cap_set(DMA_XOR, dma->cap_mask);
dma_cap_set(DMA_XOR_VAL, dma->cap_mask);
if (ioat_dma->cap & IOAT_CAP_RAID16SS)
dma->max_xor = 16;
else
dma->max_xor = 8;
}
}
dma->device_tx_status = ioat_tx_status;
ioat_dma->cleanup_fn = ioat_cleanup_event;
ioat_dma->timer_fn = ioat_timer_event;
/* starting with CB3.3 super extended descriptors are supported */
if (ioat_dma->cap & IOAT_CAP_RAID16SS) {
char pool_name[14];
int i;
for (i = 0; i < MAX_SED_POOLS; i++) {
snprintf(pool_name, 14, "ioat_hw%d_sed", i);
/* allocate SED DMA pool */
ioat_dma->sed_hw_pool[i] = dmam_pool_create(pool_name,
&pdev->dev,
SED_SIZE * (i + 1), 64, 0);
if (!ioat_dma->sed_hw_pool[i])
return -ENOMEM;
}
}
if (!(ioat_dma->cap & (IOAT_CAP_XOR | IOAT_CAP_PQ)))
dma_cap_set(DMA_PRIVATE, dma->cap_mask);
err = ioat_probe(ioat_dma);
if (err)
return err;
list_for_each_entry(c, &dma->channels, device_node) {
ioat_chan = to_ioat_chan(c);
writel(IOAT_DMA_DCA_ANY_CPU,
ioat_chan->reg_base + IOAT_DCACTRL_OFFSET);
}
err = ioat_register(ioat_dma);
if (err)
return err;
ioat_kobject_add(ioat_dma, &ioat_ktype);
if (dca)
ioat_dma->dca = ioat3_dca_init(pdev, ioat_dma->reg_base);
return 0;
}
#define DRV_NAME "ioatdma"
static struct pci_driver ioat_pci_driver = {
.name = DRV_NAME,
.id_table = ioat_pci_tbl,
.probe = ioat_pci_probe,
.remove = ioat_remove,
};
static struct ioatdma_device *
alloc_ioatdma(struct pci_dev *pdev, void __iomem *iobase)
{
struct device *dev = &pdev->dev;
struct ioatdma_device *d = devm_kzalloc(dev, sizeof(*d), GFP_KERNEL);
if (!d)
return NULL;
d->pdev = pdev;
d->reg_base = iobase;
return d;
}
static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
void __iomem * const *iomap;
struct device *dev = &pdev->dev;
struct ioatdma_device *device;
int err;
err = pcim_enable_device(pdev);
if (err)
return err;
err = pcim_iomap_regions(pdev, 1 << IOAT_MMIO_BAR, DRV_NAME);
if (err)
return err;
iomap = pcim_iomap_table(pdev);
if (!iomap)
return -ENOMEM;
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
if (err)
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (err)
return err;
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
if (err)
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
if (err)
return err;
device = alloc_ioatdma(pdev, iomap[IOAT_MMIO_BAR]);
if (!device)
return -ENOMEM;
pci_set_master(pdev);
pci_set_drvdata(pdev, device);
device->version = readb(device->reg_base + IOAT_VER_OFFSET);
if (device->version >= IOAT_VER_3_0)
err = ioat3_dma_probe(device, ioat_dca_enabled);
else
return -ENODEV;
if (err) {
dev_err(dev, "Intel(R) I/OAT DMA Engine init failed\n");
return -ENODEV;
}
return 0;
}
static void ioat_remove(struct pci_dev *pdev)
{
struct ioatdma_device *device = pci_get_drvdata(pdev);
if (!device)
return;
dev_err(&pdev->dev, "Removing dma and dca services\n");
if (device->dca) {
unregister_dca_provider(device->dca, &pdev->dev);
free_dca_provider(device->dca);
device->dca = NULL;
}
ioat_dma_remove(device);
}
static int __init ioat_init_module(void)
{
int err = -ENOMEM;
pr_info("%s: Intel(R) QuickData Technology Driver %s\n",
DRV_NAME, IOAT_DMA_VERSION);
ioat_cache = kmem_cache_create("ioat", sizeof(struct ioat_ring_ent),
0, SLAB_HWCACHE_ALIGN, NULL);
if (!ioat_cache)
return -ENOMEM;
ioat_sed_cache = KMEM_CACHE(ioat_sed_ent, 0);
if (!ioat_sed_cache)
goto err_ioat_cache;
err = pci_register_driver(&ioat_pci_driver);
if (err)
goto err_ioat3_cache;
return 0;
err_ioat3_cache:
kmem_cache_destroy(ioat_sed_cache);
err_ioat_cache:
kmem_cache_destroy(ioat_cache);
return err;
}
module_init(ioat_init_module);
static void __exit ioat_exit_module(void)
{
pci_unregister_driver(&ioat_pci_driver);
kmem_cache_destroy(ioat_cache);
}
module_exit(ioat_exit_module);
drivers/dma/ioat/pci.c deleted 100644 → 0
View file @ 80b19736
/*
* Intel I/OAT DMA Linux driver
* Copyright(c) 2007 - 2009 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
*/
/*
* This driver supports an Intel I/OAT DMA engine, which does asynchronous
* copy operations.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/dca.h>
#include <linux/slab.h>
#include <linux/acpi.h>
#include "dma.h"
#include "registers.h"
#include "hw.h"
MODULE_VERSION(IOAT_DMA_VERSION);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Intel Corporation");
static struct pci_device_id ioat_pci_tbl[] = {
/* I/OAT v3 platforms */
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG0) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG1) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG2) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG3) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG4) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG5) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG6) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG7) },
/* I/OAT v3.2 platforms */
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF0) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF1) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF2) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF3) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF4) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF5) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF6) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF7) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF8) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF9) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB0) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB1) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB2) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB3) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB4) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB5) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB6) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB7) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB8) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB9) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB0) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB1) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB2) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB3) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB4) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB5) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB6) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB7) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB8) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB9) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW0) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW1) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW2) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW3) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW4) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW5) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW6) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW7) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW8) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW9) },
/* I/OAT v3.3 platforms */
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD0) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD1) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD2) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD3) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE0) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE1) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE2) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE3) },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, ioat_pci_tbl);
static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id);
static void ioat_remove(struct pci_dev *pdev);
static int ioat_dca_enabled = 1;
module_param(ioat_dca_enabled, int, 0644);
MODULE_PARM_DESC(ioat_dca_enabled, "control support of dca service (default: 1)");
struct kmem_cache *ioat_cache;
struct kmem_cache *ioat3_sed_cache;
#define DRV_NAME "ioatdma"
static struct pci_driver ioat_pci_driver = {
.name = DRV_NAME,
.id_table = ioat_pci_tbl,
.probe = ioat_pci_probe,
.remove = ioat_remove,
};
static struct ioatdma_device *
alloc_ioatdma(struct pci_dev *pdev, void __iomem *iobase)
{
struct device *dev = &pdev->dev;
struct ioatdma_device *d = devm_kzalloc(dev, sizeof(*d), GFP_KERNEL);
if (!d)
return NULL;
d->pdev = pdev;
d->reg_base = iobase;
return d;
}
/*
* The dmaengine core assumes that async DMA devices will only be removed
* when they not used anymore, or it assumes dma_async_device_unregister()
* will only be called by dma driver exit routines. But this assumption is
* not true for the IOAT driver, which calls dma_async_device_unregister()
* from ioat_remove(). So current IOAT driver doesn't support device
* hot-removal because it may cause system crash to hot-remove inuse IOAT
* devices.
*
* This is a hack to disable IOAT devices under ejectable PCI host bridge
* so it won't break PCI host bridge hot-removal.
*/
static bool ioat_pci_has_ejectable_acpi_ancestor(struct pci_dev *pdev)
{
#ifdef CONFIG_ACPI
struct pci_bus *bus = pdev->bus;
struct acpi_device *adev;
while (bus->parent)
bus = bus->parent;
for (adev = ACPI_COMPANION(bus->bridge); adev; adev = adev->parent)
if (adev->flags.ejectable)
return true;
#endif
return false;
}
static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
void __iomem * const *iomap;
struct device *dev = &pdev->dev;
struct ioatdma_device *device;
int err;
if (ioat_pci_has_ejectable_acpi_ancestor(pdev)) {
dev_dbg(&pdev->dev, "ignore ejectable IOAT device.\n");
return -ENODEV;
}
err = pcim_enable_device(pdev);
if (err)
return err;
err = pcim_iomap_regions(pdev, 1 << IOAT_MMIO_BAR, DRV_NAME);
if (err)
return err;
iomap = pcim_iomap_table(pdev);
if (!iomap)
return -ENOMEM;
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
if (err)
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (err)
return err;
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
if (err)
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
if (err)
return err;
device = alloc_ioatdma(pdev, iomap[IOAT_MMIO_BAR]);
if (!device)
return -ENOMEM;
pci_set_master(pdev);
pci_set_drvdata(pdev, device);
device->version = readb(device->reg_base + IOAT_VER_OFFSET);
if (device->version >= IOAT_VER_3_0)
err = ioat3_dma_probe(device, ioat_dca_enabled);
else
return -ENODEV;
if (err) {
dev_err(dev, "Intel(R) I/OAT DMA Engine init failed\n");
return -ENODEV;
}
return 0;
}
static void ioat_remove(struct pci_dev *pdev)
{
struct ioatdma_device *device = pci_get_drvdata(pdev);
if (!device)
return;
dev_err(&pdev->dev, "Removing dma and dca services\n");
if (device->dca) {
unregister_dca_provider(device->dca, &pdev->dev);
free_dca_provider(device->dca);
device->dca = NULL;
}
ioat_dma_remove(device);
}
static int __init ioat_init_module(void)
{
int err = -ENOMEM;
pr_info("%s: Intel(R) QuickData Technology Driver %s\n",
DRV_NAME, IOAT_DMA_VERSION);
ioat_cache = kmem_cache_create("ioat", sizeof(struct ioat_ring_ent),
0, SLAB_HWCACHE_ALIGN, NULL);
if (!ioat_cache)
return -ENOMEM;
ioat3_sed_cache = KMEM_CACHE(ioat_sed_ent, 0);
if (!ioat3_sed_cache)
goto err_ioat_cache;
err = pci_register_driver(&ioat_pci_driver);
if (err)
goto err_ioat3_cache;
return 0;
err_ioat3_cache:
kmem_cache_destroy(ioat3_sed_cache);
err_ioat_cache:
kmem_cache_destroy(ioat_cache);
return err;
}
module_init(ioat_init_module);
static void __exit ioat_exit_module(void)
{
pci_unregister_driver(&ioat_pci_driver);
kmem_cache_destroy(ioat_cache);
}
module_exit(ioat_exit_module);
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