diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index 5f321f3b4242ea0ab1b12bcf231d1ea921f0f44f..230fe9bb56ae5e6849884b2f85e77871a5479a65 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -752,6 +752,83 @@ void idxd_device_clear_state(struct idxd_device *idxd)
spin_unlock(&idxd->dev_lock);
}
+static int idxd_device_evl_setup(struct idxd_device *idxd)
+{
+ union gencfg_reg gencfg;
+ union evlcfg_reg evlcfg;
+ union genctrl_reg genctrl;
+ struct device *dev = &idxd->pdev->dev;
+ void *addr;
+ dma_addr_t dma_addr;
+ int size;
+ struct idxd_evl *evl = idxd->evl;
+
+ if (!evl)
+ return 0;
+
+ size = evl_size(idxd);
+ /*
+ * Address needs to be page aligned. However, dma_alloc_coherent() provides
+ * at minimal page size aligned address. No manual alignment required.
+ */
+ addr = dma_alloc_coherent(dev, size, &dma_addr, GFP_KERNEL);
+ if (!addr)
+ return -ENOMEM;
+
+ memset(addr, 0, size);
+
+ spin_lock(&evl->lock);
+ evl->log = addr;
+ evl->dma = dma_addr;
+ evl->log_size = size;
+
+ memset(&evlcfg, 0, sizeof(evlcfg));
+ evlcfg.bits[0] = dma_addr & GENMASK(63, 12);
+ evlcfg.size = evl->size;
+
+ iowrite64(evlcfg.bits[0], idxd->reg_base + IDXD_EVLCFG_OFFSET);
+ iowrite64(evlcfg.bits[1], idxd->reg_base + IDXD_EVLCFG_OFFSET + 8);
+
+ genctrl.bits = ioread32(idxd->reg_base + IDXD_GENCTRL_OFFSET);
+ genctrl.evl_int_en = 1;
+ iowrite32(genctrl.bits, idxd->reg_base + IDXD_GENCTRL_OFFSET);
+
+ gencfg.bits = ioread32(idxd->reg_base + IDXD_GENCFG_OFFSET);
+ gencfg.evl_en = 1;
+ iowrite32(gencfg.bits, idxd->reg_base + IDXD_GENCFG_OFFSET);
+
+ spin_unlock(&evl->lock);
+ return 0;
+}
+
+static void idxd_device_evl_free(struct idxd_device *idxd)
+{
+ union gencfg_reg gencfg;
+ union genctrl_reg genctrl;
+ struct device *dev = &idxd->pdev->dev;
+ struct idxd_evl *evl = idxd->evl;
+
+ gencfg.bits = ioread32(idxd->reg_base + IDXD_GENCFG_OFFSET);
+ if (!gencfg.evl_en)
+ return;
+
+ spin_lock(&evl->lock);
+ gencfg.evl_en = 0;
+ iowrite32(gencfg.bits, idxd->reg_base + IDXD_GENCFG_OFFSET);
+
+ genctrl.bits = ioread32(idxd->reg_base + IDXD_GENCTRL_OFFSET);
+ genctrl.evl_int_en = 0;
+ iowrite32(genctrl.bits, idxd->reg_base + IDXD_GENCTRL_OFFSET);
+
+ iowrite64(0, idxd->reg_base + IDXD_EVLCFG_OFFSET);
+ iowrite64(0, idxd->reg_base + IDXD_EVLCFG_OFFSET + 8);
+
+ dma_free_coherent(dev, evl->log_size, evl->log, evl->dma);
+ evl->log = NULL;
+ evl->size = IDXD_EVL_SIZE_MIN;
+ spin_unlock(&evl->lock);
+}
+
static void idxd_group_config_write(struct idxd_group *group)
{
struct idxd_device *idxd = group->idxd;
@@ -1451,15 +1528,24 @@ int idxd_device_drv_probe(struct idxd_dev *idxd_dev)
if (rc < 0)
return -ENXIO;
+ rc = idxd_device_evl_setup(idxd);
+ if (rc < 0) {
+ idxd->cmd_status = IDXD_SCMD_DEV_EVL_ERR;
+ return rc;
+ }
+
/* Start device */
rc = idxd_device_enable(idxd);
- if (rc < 0)
+ if (rc < 0) {
+ idxd_device_evl_free(idxd);
return rc;
+ }
/* Setup DMA device without channels */
rc = idxd_register_dma_device(idxd);
if (rc < 0) {
idxd_device_disable(idxd);
+ idxd_device_evl_free(idxd);
idxd->cmd_status = IDXD_SCMD_DEV_DMA_ERR;
return rc;
}
@@ -1488,6 +1574,7 @@ void idxd_device_drv_remove(struct idxd_dev *idxd_dev)
idxd_device_disable(idxd);
if (test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
idxd_device_reset(idxd);
+ idxd_device_evl_free(idxd);
}
static enum idxd_dev_type dev_types[] = {
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 2a71273f18226ca90535f74680f8906f5741dbf7..c74681f02b18a0ac5417d969335f8f9aad0637c4 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -262,7 +262,15 @@ struct idxd_driver_data {
};
struct idxd_evl {
+ /* Lock to protect event log access. */
+ spinlock_t lock;
+ void *log;
+ dma_addr_t dma;
+ /* Total size of event log = number of entries * entry size. */
+ unsigned int log_size;
+ /* The number of entries in the event log. */
u16 size;
+ u16 head;
};
struct idxd_device {
@@ -324,6 +332,17 @@ struct idxd_device {
struct idxd_evl *evl;
};
+static inline unsigned int evl_ent_size(struct idxd_device *idxd)
+{
+ return idxd->hw.gen_cap.evl_support ?
+ (32 * (1 << idxd->hw.gen_cap.evl_support)) : 0;
+}
+
+static inline unsigned int evl_size(struct idxd_device *idxd)
+{
+ return idxd->evl->size * evl_ent_size(idxd);
+}
+
/* IDXD software descriptor */
struct idxd_desc {
union {
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index 525de59df82a2e82d509b53fc2f8e044969af0ff..f44719a11c95a3d73b6deb4a3f30e4b36d4ab12d 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -343,6 +343,7 @@ static int idxd_init_evl(struct idxd_device *idxd)
if (!evl)
return -ENOMEM;
+ spin_lock_init(&evl->lock);
evl->size = IDXD_EVL_SIZE_MIN;
idxd->evl = evl;
return 0;
diff --git a/drivers/dma/idxd/registers.h b/drivers/dma/idxd/registers.h
index ea3a499a3c3c478490634197a2beeb6d0d40db34..11bb97cf7481ca934e75dd51b58a0c8d92c0315e 100644
--- a/drivers/dma/idxd/registers.h
+++ b/drivers/dma/idxd/registers.h
@@ -3,6 +3,8 @@
#ifndef _IDXD_REGISTERS_H_
#define _IDXD_REGISTERS_H_
+#include <uapi/linux/idxd.h>
+
/* PCI Config */
#define PCI_DEVICE_ID_INTEL_DSA_SPR0 0x0b25
#define PCI_DEVICE_ID_INTEL_IAX_SPR0 0x0cfe
@@ -119,7 +121,8 @@ union gencfg_reg {
u32 rdbuf_limit:8;
u32 rsvd:4;
u32 user_int_en:1;
- u32 rsvd2:19;
+ u32 evl_en:1;
+ u32 rsvd2:18;
};
u32 bits;
} __packed;
@@ -129,7 +132,8 @@ union genctrl_reg {
struct {
u32 softerr_int_en:1;
u32 halt_int_en:1;
- u32 rsvd:30;
+ u32 evl_int_en:1;
+ u32 rsvd:29;
};
u32 bits;
} __packed;
@@ -299,6 +303,21 @@ union iaa_cap_reg {
#define IDXD_IAACAP_OFFSET 0x180
+#define IDXD_EVLCFG_OFFSET 0xe0
+union evlcfg_reg {
+ struct {
+ u64 pasid_en:1;
+ u64 priv:1;
+ u64 rsvd:10;
+ u64 base_addr:52;
+
+ u64 size:16;
+ u64 pasid:20;
+ u64 rsvd2:28;
+ };
+ u64 bits[2];
+} __packed;
+
#define IDXD_EVL_SIZE_MIN 0x0040
#define IDXD_EVL_SIZE_MAX 0xffff
@@ -539,4 +558,53 @@ union filter_cfg {
u64 val;
} __packed;
+struct __evl_entry {
+ u64 rsvd:2;
+ u64 desc_valid:1;
+ u64 wq_idx_valid:1;
+ u64 batch:1;
+ u64 fault_rw:1;
+ u64 priv:1;
+ u64 err_info_valid:1;
+ u64 error:8;
+ u64 wq_idx:8;
+ u64 batch_id:8;
+ u64 operation:8;
+ u64 pasid:20;
+ u64 rsvd2:4;
+
+ u16 batch_idx;
+ u16 rsvd3;
+ union {
+ /* Invalid Flags 0x11 */
+ u32 invalid_flags;
+ /* Invalid Int Handle 0x19 */
+ /* Page fault 0x1a */
+ /* Page fault 0x06, 0x1f, only operand_id */
+ /* Page fault before drain or in batch, 0x26, 0x27 */
+ struct {
+ u16 int_handle;
+ u16 rci:1;
+ u16 ims:1;
+ u16 rcr:1;
+ u16 first_err_in_batch:1;
+ u16 rsvd4_2:9;
+ u16 operand_id:3;
+ };
+ };
+ u64 fault_addr;
+ u64 rsvd5;
+} __packed;
+
+struct dsa_evl_entry {
+ struct __evl_entry e;
+ struct dsa_completion_record cr;
+} __packed;
+
+struct iax_evl_entry {
+ struct __evl_entry e;
+ u64 rsvd[4];
+ struct iax_completion_record cr;
+} __packed;
+
#endif
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index 85644e5bde8398b1eb2cc2e6a23565b86cdc3f6f..163fdfaa502236e4d5491969147f114bcc717d01 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -1605,7 +1605,8 @@ static ssize_t event_log_size_store(struct device *dev,
if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
return -EPERM;
- if (val < IDXD_EVL_SIZE_MIN || val > IDXD_EVL_SIZE_MAX)
+ if (val < IDXD_EVL_SIZE_MIN || val > IDXD_EVL_SIZE_MAX ||
+ (val * evl_ent_size(idxd) > ULONG_MAX - idxd->evl->dma))
return -EINVAL;
idxd->evl->size = val;
diff --git a/include/uapi/linux/idxd.h b/include/uapi/linux/idxd.h
index fc47635b57dc9d68cad62dde74faaef5a00d8f04..5d05bf12f2bd7007e179bd83624302ed677c8507 100644
--- a/include/uapi/linux/idxd.h
+++ b/include/uapi/linux/idxd.h
@@ -30,6 +30,7 @@ enum idxd_scmd_stat {
IDXD_SCMD_WQ_NO_PRIV = 0x800f0000,
IDXD_SCMD_WQ_IRQ_ERR = 0x80100000,
IDXD_SCMD_WQ_USER_NO_IOMMU = 0x80110000,
+ IDXD_SCMD_DEV_EVL_ERR = 0x80120000,
};
#define IDXD_SCMD_SOFTERR_MASK 0x80000000