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dmaengine: idxd: remove detection of device type

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Move all static data type for per device type to an idxd_driver_data data
structure. The data can be attached to the pci_device_id and provided by
the pci probe function. This removes a lot of unnecessary type detection
and setup code.

Suggested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161852988924.2203940.2787590808682466398.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Dave Jiang 2021-04-15 16:38:09 -07:00 committed by Vinod Koul
parent 4b73e4ebd4
commit 435b512dbc
6 changed files with 48 additions and 75 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/dma/idxd/cdev.c
View File

@ -45,7 +45,7 @@ static void idxd_cdev_dev_release(struct device *dev)
struct idxd_cdev_context *cdev_ctx;
struct idxd_wq *wq = idxd_cdev->wq;
cdev_ctx = &ictx[wq->idxd->type];
cdev_ctx = &ictx[wq->idxd->data->type];
ida_simple_remove(&cdev_ctx->minor_ida, idxd_cdev->minor);
kfree(idxd_cdev);
}
@ -239,7 +239,7 @@ static const struct file_operations idxd_cdev_fops = {
int idxd_cdev_get_major(struct idxd_device *idxd)
{
return MAJOR(ictx[idxd->type].devt);
return MAJOR(ictx[idxd->data->type].devt);
}
int idxd_wq_add_cdev(struct idxd_wq *wq)
@ -258,7 +258,7 @@ int idxd_wq_add_cdev(struct idxd_wq *wq)
idxd_cdev->wq = wq;
cdev = &idxd_cdev->cdev;
dev = &idxd_cdev->dev;
cdev_ctx = &ictx[wq->idxd->type];
cdev_ctx = &ictx[wq->idxd->data->type];
minor = ida_simple_get(&cdev_ctx->minor_ida, 0, MINORMASK, GFP_KERNEL);
if (minor < 0) {
kfree(idxd_cdev);
@ -272,8 +272,7 @@ int idxd_wq_add_cdev(struct idxd_wq *wq)
dev->type = &idxd_cdev_device_type;
dev->devt = MKDEV(MAJOR(cdev_ctx->devt), minor);
rc = dev_set_name(dev, "%s/wq%u.%u", idxd_get_dev_name(idxd),
idxd->id, wq->id);
rc = dev_set_name(dev, "%s/wq%u.%u", idxd->data->name_prefix, idxd->id, wq->id);
if (rc < 0)
goto err;
@ -298,7 +297,7 @@ void idxd_wq_del_cdev(struct idxd_wq *wq)
struct idxd_cdev *idxd_cdev;
struct idxd_cdev_context *cdev_ctx;
cdev_ctx = &ictx[wq->idxd->type];
cdev_ctx = &ictx[wq->idxd->data->type];
idxd_cdev = wq->idxd_cdev;
wq->idxd_cdev = NULL;
cdev_device_del(&idxd_cdev->cdev, &idxd_cdev->dev);

16
drivers/dma/idxd/device.c
View File

@ -144,14 +144,8 @@ int idxd_wq_alloc_resources(struct idxd_wq *wq)
if (rc < 0)
return rc;
if (idxd->type == IDXD_TYPE_DSA)
align = 32;
else if (idxd->type == IDXD_TYPE_IAX)
align = 64;
else
return -ENODEV;
wq->compls_size = num_descs * idxd->compl_size + align;
align = idxd->data->align;
wq->compls_size = num_descs * idxd->data->compl_size + align;
wq->compls_raw = dma_alloc_coherent(dev, wq->compls_size,
&wq->compls_addr_raw, GFP_KERNEL);
if (!wq->compls_raw) {
@ -178,11 +172,11 @@ int idxd_wq_alloc_resources(struct idxd_wq *wq)
struct idxd_desc *desc = wq->descs[i];
desc->hw = wq->hw_descs[i];
if (idxd->type == IDXD_TYPE_DSA)
if (idxd->data->type == IDXD_TYPE_DSA)
desc->completion = &wq->compls[i];
else if (idxd->type == IDXD_TYPE_IAX)
else if (idxd->data->type == IDXD_TYPE_IAX)
desc->iax_completion = &wq->iax_compls[i];
desc->compl_dma = wq->compls_addr + idxd->compl_size * i;
desc->compl_dma = wq->compls_addr + idxd->data->compl_size * i;
desc->id = i;
desc->wq = wq;
desc->cpu = -1;

13
drivers/dma/idxd/idxd.h
View File

@ -178,9 +178,17 @@ struct idxd_dma_dev {
struct dma_device dma;
};
struct idxd_device {
struct idxd_driver_data {
const char *name_prefix;
enum idxd_type type;
struct device_type *dev_type;
int compl_size;
int align;
};
struct idxd_device {
struct device conf_dev;
struct idxd_driver_data *data;
struct list_head list;
struct idxd_hw hw;
enum idxd_device_state state;
@ -218,7 +226,6 @@ struct idxd_device {
int token_limit;
int nr_tokens; /* non-reserved tokens */
unsigned int wqcfg_size;
int compl_size;
union sw_err_reg sw_err;
wait_queue_head_t cmd_waitq;
@ -347,14 +354,12 @@ static inline int idxd_wq_refcount(struct idxd_wq *wq)
return wq->client_count;
};
const char *idxd_get_dev_name(struct idxd_device *idxd);
int idxd_register_bus_type(void);
void idxd_unregister_bus_type(void);
int idxd_register_devices(struct idxd_device *idxd);
void idxd_unregister_devices(struct idxd_device *idxd);
int idxd_register_driver(void);
void idxd_unregister_driver(void);
struct device_type *idxd_get_device_type(struct idxd_device *idxd);
/* device interrupt control */
void idxd_msix_perm_setup(struct idxd_device *idxd);

65
drivers/dma/idxd/init.c
View File

@ -35,26 +35,33 @@ MODULE_PARM_DESC(sva, "Toggle SVA support on/off");
bool support_enqcmd;
DEFINE_IDA(idxd_ida);
static struct idxd_driver_data idxd_driver_data[] = {
[IDXD_TYPE_DSA] = {
.name_prefix = "dsa",
.type = IDXD_TYPE_DSA,
.compl_size = sizeof(struct dsa_completion_record),
.align = 32,
.dev_type = &dsa_device_type,
},
[IDXD_TYPE_IAX] = {
.name_prefix = "iax",
.type = IDXD_TYPE_IAX,
.compl_size = sizeof(struct iax_completion_record),
.align = 64,
.dev_type = &iax_device_type,
},
};
static struct pci_device_id idxd_pci_tbl[] = {
/* DSA ver 1.0 platforms */
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_DSA_SPR0) },
{ PCI_DEVICE_DATA(INTEL, DSA_SPR0, &idxd_driver_data[IDXD_TYPE_DSA]) },
/* IAX ver 1.0 platforms */
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IAX_SPR0) },
{ PCI_DEVICE_DATA(INTEL, IAX_SPR0, &idxd_driver_data[IDXD_TYPE_IAX]) },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, idxd_pci_tbl);
static char *idxd_name[] = {
"dsa",
"iax"
};
const char *idxd_get_dev_name(struct idxd_device *idxd)
{
return idxd_name[idxd->type];
}
static int idxd_setup_interrupts(struct idxd_device *idxd)
{
struct pci_dev *pdev = idxd->pdev;
@ -379,19 +386,7 @@ static void idxd_read_caps(struct idxd_device *idxd)
}
}
static inline void idxd_set_type(struct idxd_device *idxd)
{
struct pci_dev *pdev = idxd->pdev;
if (pdev->device == PCI_DEVICE_ID_INTEL_DSA_SPR0)
idxd->type = IDXD_TYPE_DSA;
else if (pdev->device == PCI_DEVICE_ID_INTEL_IAX_SPR0)
idxd->type = IDXD_TYPE_IAX;
else
idxd->type = IDXD_TYPE_UNKNOWN;
}
static struct idxd_device *idxd_alloc(struct pci_dev *pdev)
static struct idxd_device *idxd_alloc(struct pci_dev *pdev, struct idxd_driver_data *data)
{
struct device *dev = &pdev->dev;
struct idxd_device *idxd;
@ -402,7 +397,7 @@ static struct idxd_device *idxd_alloc(struct pci_dev *pdev)
return NULL;
idxd->pdev = pdev;
idxd_set_type(idxd);
idxd->data = data;
idxd->id = ida_alloc(&idxd_ida, GFP_KERNEL);
if (idxd->id < 0)
return NULL;
@ -410,8 +405,8 @@ static struct idxd_device *idxd_alloc(struct pci_dev *pdev)
device_initialize(&idxd->conf_dev);
idxd->conf_dev.parent = dev;
idxd->conf_dev.bus = &dsa_bus_type;
idxd->conf_dev.type = idxd_get_device_type(idxd);
rc = dev_set_name(&idxd->conf_dev, "%s%d", idxd_get_dev_name(idxd), idxd->id);
idxd->conf_dev.type = idxd->data->dev_type;
rc = dev_set_name(&idxd->conf_dev, "%s%d", idxd->data->name_prefix, idxd->id);
if (rc < 0) {
put_device(&idxd->conf_dev);
return NULL;
@ -503,18 +498,11 @@ static int idxd_probe(struct idxd_device *idxd)
return rc;
}
static void idxd_type_init(struct idxd_device *idxd)
{
if (idxd->type == IDXD_TYPE_DSA)
idxd->compl_size = sizeof(struct dsa_completion_record);
else if (idxd->type == IDXD_TYPE_IAX)
idxd->compl_size = sizeof(struct iax_completion_record);
}
static int idxd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct device *dev = &pdev->dev;
struct idxd_device *idxd;
struct idxd_driver_data *data = (struct idxd_driver_data *)id->driver_data;
int rc;
rc = pci_enable_device(pdev);
@ -522,7 +510,7 @@ static int idxd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
return rc;
dev_dbg(dev, "Alloc IDXD context\n");
idxd = idxd_alloc(pdev);
idxd = idxd_alloc(pdev, data);
if (!idxd) {
rc = -ENOMEM;
goto err_idxd_alloc;
@ -548,9 +536,6 @@ static int idxd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (rc)
goto err;
idxd_type_init(idxd);
dev_dbg(dev, "Set PCI master\n");
pci_set_master(pdev);
pci_set_drvdata(pdev, idxd);

2
drivers/dma/idxd/submit.c
View File

@ -15,7 +15,7 @@ static struct idxd_desc *__get_desc(struct idxd_wq *wq, int idx, int cpu)
desc = wq->descs[idx];
memset(desc->hw, 0, sizeof(struct dsa_hw_desc));
memset(desc->completion, 0, idxd->compl_size);
memset(desc->completion, 0, idxd->data->compl_size);
desc->cpu = cpu;
if (device_pasid_enabled(idxd))

16
drivers/dma/idxd/sysfs.c
View File

@ -310,16 +310,6 @@ static struct idxd_device_driver dsa_drv = {
},
};
struct device_type *idxd_get_device_type(struct idxd_device *idxd)
{
if (idxd->type == IDXD_TYPE_DSA)
return &dsa_device_type;
else if (idxd->type == IDXD_TYPE_IAX)
return &iax_device_type;
else
return NULL;
}
/* IDXD generic driver setup */
int idxd_register_driver(void)
{
@ -453,7 +443,7 @@ static ssize_t group_tokens_reserved_store(struct device *dev,
if (rc < 0)
return -EINVAL;
if (idxd->type == IDXD_TYPE_IAX)
if (idxd->data->type == IDXD_TYPE_IAX)
return -EOPNOTSUPP;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
@ -501,7 +491,7 @@ static ssize_t group_tokens_allowed_store(struct device *dev,
if (rc < 0)
return -EINVAL;
if (idxd->type == IDXD_TYPE_IAX)
if (idxd->data->type == IDXD_TYPE_IAX)
return -EOPNOTSUPP;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
@ -546,7 +536,7 @@ static ssize_t group_use_token_limit_store(struct device *dev,
if (rc < 0)
return -EINVAL;
if (idxd->type == IDXD_TYPE_IAX)
if (idxd->data->type == IDXD_TYPE_IAX)
return -EOPNOTSUPP;
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))