* Update page fault event according to last specification.
* Separate code path for page fault EQ, completion EQ and async EQ.
* Move page fault handling work queue from mlx5_ib static variable
into mlx5_core page fault EQ.
* Allocate memory to store ODP event dynamically as the
events arrive, since in atomic context - use mempool.
* Make mlx5_ib page fault handler run in process context.
Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
.add = mlx5_ib_add,
.remove = mlx5_ib_remove,
.event = mlx5_ib_event,
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+ .pfault = mlx5_ib_pfault,
+#endif
.protocol = MLX5_INTERFACE_PROTOCOL_IB,
};
if (deprecated_prof_sel != 2)
pr_warn("prof_sel is deprecated for mlx5_ib, set it for mlx5_core\n");
- err = mlx5_ib_odp_init();
- if (err)
- return err;
-
err = mlx5_register_interface(&mlx5_ib_interface);
- if (err)
- goto clean_odp;
-
- return err;
-clean_odp:
- mlx5_ib_odp_cleanup();
return err;
}
static void __exit mlx5_ib_cleanup(void)
{
mlx5_unregister_interface(&mlx5_ib_interface);
- mlx5_ib_odp_cleanup();
}
module_init(mlx5_ib_init);
u32 rqtn;
};
-/*
- * Connect-IB can trigger up to four concurrent pagefaults
- * per-QP.
- */
-enum mlx5_ib_pagefault_context {
- MLX5_IB_PAGEFAULT_RESPONDER_READ,
- MLX5_IB_PAGEFAULT_REQUESTOR_READ,
- MLX5_IB_PAGEFAULT_RESPONDER_WRITE,
- MLX5_IB_PAGEFAULT_REQUESTOR_WRITE,
- MLX5_IB_PAGEFAULT_CONTEXTS
-};
-
-static inline enum mlx5_ib_pagefault_context
- mlx5_ib_get_pagefault_context(struct mlx5_pagefault *pagefault)
-{
- return pagefault->flags & (MLX5_PFAULT_REQUESTOR | MLX5_PFAULT_WRITE);
-}
-
-struct mlx5_ib_pfault {
- struct work_struct work;
- struct mlx5_pagefault mpfault;
-};
-
struct mlx5_ib_ubuffer {
struct ib_umem *umem;
int buf_size;
/* Store signature errors */
bool signature_en;
-#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
- /*
- * A flag that is true for QP's that are in a state that doesn't
- * allow page faults, and shouldn't schedule any more faults.
- */
- int disable_page_faults;
- /*
- * The disable_page_faults_lock protects a QP's disable_page_faults
- * field, allowing for a thread to atomically check whether the QP
- * allows page faults, and if so schedule a page fault.
- */
- spinlock_t disable_page_faults_lock;
- struct mlx5_ib_pfault pagefaults[MLX5_IB_PAGEFAULT_CONTEXTS];
-#endif
struct list_head qps_list;
struct list_head cq_recv_list;
struct list_head cq_send_list;
int mlx5_ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *wq_ind_table);
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
-extern struct workqueue_struct *mlx5_ib_page_fault_wq;
-
void mlx5_ib_internal_fill_odp_caps(struct mlx5_ib_dev *dev);
-void mlx5_ib_mr_pfault_handler(struct mlx5_ib_qp *qp,
- struct mlx5_ib_pfault *pfault);
-void mlx5_ib_odp_create_qp(struct mlx5_ib_qp *qp);
+void mlx5_ib_pfault(struct mlx5_core_dev *mdev, void *context,
+ struct mlx5_pagefault *pfault);
int mlx5_ib_odp_init_one(struct mlx5_ib_dev *ibdev);
void mlx5_ib_odp_remove_one(struct mlx5_ib_dev *ibdev);
int __init mlx5_ib_odp_init(void);
void mlx5_ib_odp_cleanup(void);
-void mlx5_ib_qp_disable_pagefaults(struct mlx5_ib_qp *qp);
-void mlx5_ib_qp_enable_pagefaults(struct mlx5_ib_qp *qp);
void mlx5_ib_invalidate_range(struct ib_umem *umem, unsigned long start,
unsigned long end);
#else /* CONFIG_INFINIBAND_ON_DEMAND_PAGING */
return;
}
-static inline void mlx5_ib_odp_create_qp(struct mlx5_ib_qp *qp) {}
static inline int mlx5_ib_odp_init_one(struct mlx5_ib_dev *ibdev) { return 0; }
static inline void mlx5_ib_odp_remove_one(struct mlx5_ib_dev *ibdev) {}
static inline int mlx5_ib_odp_init(void) { return 0; }
static inline void mlx5_ib_odp_cleanup(void) {}
-static inline void mlx5_ib_qp_disable_pagefaults(struct mlx5_ib_qp *qp) {}
-static inline void mlx5_ib_qp_enable_pagefaults(struct mlx5_ib_qp *qp) {}
#endif /* CONFIG_INFINIBAND_ON_DEMAND_PAGING */
* a pagefault. */
#define MMU_NOTIFIER_TIMEOUT 1000
-struct workqueue_struct *mlx5_ib_page_fault_wq;
-
void mlx5_ib_invalidate_range(struct ib_umem *umem, unsigned long start,
unsigned long end)
{
return container_of(mmkey, struct mlx5_ib_mr, mmkey);
}
-static void mlx5_ib_page_fault_resume(struct mlx5_ib_qp *qp,
- struct mlx5_ib_pfault *pfault,
+static void mlx5_ib_page_fault_resume(struct mlx5_ib_dev *dev,
+ struct mlx5_pagefault *pfault,
int error)
{
- struct mlx5_ib_dev *dev = to_mdev(qp->ibqp.pd->device);
- u32 qpn = qp->trans_qp.base.mqp.qpn;
+ int wq_num = pfault->event_subtype == MLX5_PFAULT_SUBTYPE_WQE ?
+ pfault->wqe.wq_num : pfault->token;
int ret = mlx5_core_page_fault_resume(dev->mdev,
- qpn,
- pfault->mpfault.flags,
+ pfault->token,
+ wq_num,
+ pfault->type,
error);
if (ret)
- pr_err("Failed to resolve the page fault on QP 0x%x\n", qpn);
+ mlx5_ib_err(dev, "Failed to resolve the page fault on WQ 0x%x\n",
+ wq_num);
}
/*
- * Handle a single data segment in a page-fault WQE.
+ * Handle a single data segment in a page-fault WQE or RDMA region.
*
- * Returns number of pages retrieved on success. The caller will continue to
+ * Returns number of pages retrieved on success. The caller may continue to
* the next data segment.
* Can return the following error codes:
* -EAGAIN to designate a temporary error. The caller will abort handling the
* page fault and resolve it.
* -EFAULT when there's an error mapping the requested pages. The caller will
- * abort the page fault handling and possibly move the QP to an error state.
- * On other errors the QP should also be closed with an error.
+ * abort the page fault handling.
*/
-static int pagefault_single_data_segment(struct mlx5_ib_qp *qp,
- struct mlx5_ib_pfault *pfault,
+static int pagefault_single_data_segment(struct mlx5_ib_dev *mib_dev,
u32 key, u64 io_virt, size_t bcnt,
+ u32 *bytes_committed,
u32 *bytes_mapped)
{
- struct mlx5_ib_dev *mib_dev = to_mdev(qp->ibqp.pd->device);
int srcu_key;
unsigned int current_seq;
u64 start_idx;
key);
if (bytes_mapped)
*bytes_mapped +=
- (bcnt - pfault->mpfault.bytes_committed);
- goto srcu_unlock;
- }
- if (mr->ibmr.pd != qp->ibqp.pd) {
- pr_err("Page-fault with different PDs for QP and MR.\n");
- ret = -EFAULT;
+ (bcnt - *bytes_committed);
goto srcu_unlock;
}
* in all iterations (in iteration 2 and above,
* bytes_committed == 0).
*/
- io_virt += pfault->mpfault.bytes_committed;
- bcnt -= pfault->mpfault.bytes_committed;
+ io_virt += *bytes_committed;
+ bcnt -= *bytes_committed;
start_idx = (io_virt - (mr->mmkey.iova & PAGE_MASK)) >> PAGE_SHIFT;
}
}
srcu_read_unlock(&mib_dev->mr_srcu, srcu_key);
- pfault->mpfault.bytes_committed = 0;
+ *bytes_committed = 0;
return ret ? ret : npages;
}
* Returns the number of pages loaded if positive, zero for an empty WQE, or a
* negative error code.
*/
-static int pagefault_data_segments(struct mlx5_ib_qp *qp,
- struct mlx5_ib_pfault *pfault, void *wqe,
+static int pagefault_data_segments(struct mlx5_ib_dev *dev,
+ struct mlx5_pagefault *pfault,
+ struct mlx5_ib_qp *qp, void *wqe,
void *wqe_end, u32 *bytes_mapped,
u32 *total_wqe_bytes, int receive_queue)
{
if (!inline_segment && total_wqe_bytes) {
*total_wqe_bytes += bcnt - min_t(size_t, bcnt,
- pfault->mpfault.bytes_committed);
+ pfault->bytes_committed);
}
/* A zero length data segment designates a length of 2GB. */
if (bcnt == 0)
bcnt = 1U << 31;
- if (inline_segment || bcnt <= pfault->mpfault.bytes_committed) {
- pfault->mpfault.bytes_committed -=
+ if (inline_segment || bcnt <= pfault->bytes_committed) {
+ pfault->bytes_committed -=
min_t(size_t, bcnt,
- pfault->mpfault.bytes_committed);
+ pfault->bytes_committed);
continue;
}
- ret = pagefault_single_data_segment(qp, pfault, key, io_virt,
- bcnt, bytes_mapped);
+ ret = pagefault_single_data_segment(dev, key, io_virt, bcnt,
+ &pfault->bytes_committed,
+ bytes_mapped);
if (ret < 0)
break;
npages += ret;
* scatter-gather list, and set wqe_end to the end of the WQE.
*/
static int mlx5_ib_mr_initiator_pfault_handler(
- struct mlx5_ib_qp *qp, struct mlx5_ib_pfault *pfault,
- void **wqe, void **wqe_end, int wqe_length)
+ struct mlx5_ib_dev *dev, struct mlx5_pagefault *pfault,
+ struct mlx5_ib_qp *qp, void **wqe, void **wqe_end, int wqe_length)
{
- struct mlx5_ib_dev *dev = to_mdev(qp->ibqp.pd->device);
struct mlx5_wqe_ctrl_seg *ctrl = *wqe;
- u16 wqe_index = pfault->mpfault.wqe.wqe_index;
+ u16 wqe_index = pfault->wqe.wqe_index;
unsigned ds, opcode;
#if defined(DEBUG)
u32 ctrl_wqe_index, ctrl_qpn;
* scatter-gather list, and set wqe_end to the end of the WQE.
*/
static int mlx5_ib_mr_responder_pfault_handler(
- struct mlx5_ib_qp *qp, struct mlx5_ib_pfault *pfault,
- void **wqe, void **wqe_end, int wqe_length)
+ struct mlx5_ib_dev *dev, struct mlx5_pagefault *pfault,
+ struct mlx5_ib_qp *qp, void **wqe, void **wqe_end, int wqe_length)
{
- struct mlx5_ib_dev *dev = to_mdev(qp->ibqp.pd->device);
struct mlx5_ib_wq *wq = &qp->rq;
int wqe_size = 1 << wq->wqe_shift;
return 0;
}
-static void mlx5_ib_mr_wqe_pfault_handler(struct mlx5_ib_qp *qp,
- struct mlx5_ib_pfault *pfault)
+static struct mlx5_ib_qp *mlx5_ib_odp_find_qp(struct mlx5_ib_dev *dev,
+ u32 wq_num)
+{
+ struct mlx5_core_qp *mqp = __mlx5_qp_lookup(dev->mdev, wq_num);
+
+ if (!mqp) {
+ mlx5_ib_err(dev, "QPN 0x%6x not found\n", wq_num);
+ return NULL;
+ }
+
+ return to_mibqp(mqp);
+}
+
+static void mlx5_ib_mr_wqe_pfault_handler(struct mlx5_ib_dev *dev,
+ struct mlx5_pagefault *pfault)
{
- struct mlx5_ib_dev *dev = to_mdev(qp->ibqp.pd->device);
int ret;
void *wqe, *wqe_end;
u32 bytes_mapped, total_wqe_bytes;
char *buffer = NULL;
- int resume_with_error = 0;
- u16 wqe_index = pfault->mpfault.wqe.wqe_index;
- int requestor = pfault->mpfault.flags & MLX5_PFAULT_REQUESTOR;
- u32 qpn = qp->trans_qp.base.mqp.qpn;
+ int resume_with_error = 1;
+ u16 wqe_index = pfault->wqe.wqe_index;
+ int requestor = pfault->type & MLX5_PFAULT_REQUESTOR;
+ struct mlx5_ib_qp *qp;
buffer = (char *)__get_free_page(GFP_KERNEL);
if (!buffer) {
mlx5_ib_err(dev, "Error allocating memory for IO page fault handling.\n");
- resume_with_error = 1;
goto resolve_page_fault;
}
+ qp = mlx5_ib_odp_find_qp(dev, pfault->wqe.wq_num);
+ if (!qp)
+ goto resolve_page_fault;
+
ret = mlx5_ib_read_user_wqe(qp, requestor, wqe_index, buffer,
PAGE_SIZE, &qp->trans_qp.base);
if (ret < 0) {
- mlx5_ib_err(dev, "Failed reading a WQE following page fault, error=%x, wqe_index=%x, qpn=%x\n",
- -ret, wqe_index, qpn);
- resume_with_error = 1;
+ mlx5_ib_err(dev, "Failed reading a WQE following page fault, error=%d, wqe_index=%x, qpn=%x\n",
+ ret, wqe_index, pfault->token);
goto resolve_page_fault;
}
wqe = buffer;
if (requestor)
- ret = mlx5_ib_mr_initiator_pfault_handler(qp, pfault, &wqe,
+ ret = mlx5_ib_mr_initiator_pfault_handler(dev, pfault, qp, &wqe,
&wqe_end, ret);
else
- ret = mlx5_ib_mr_responder_pfault_handler(qp, pfault, &wqe,
+ ret = mlx5_ib_mr_responder_pfault_handler(dev, pfault, qp, &wqe,
&wqe_end, ret);
- if (ret < 0) {
- resume_with_error = 1;
+ if (ret < 0)
goto resolve_page_fault;
- }
if (wqe >= wqe_end) {
mlx5_ib_err(dev, "ODP fault on invalid WQE.\n");
- resume_with_error = 1;
goto resolve_page_fault;
}
- ret = pagefault_data_segments(qp, pfault, wqe, wqe_end, &bytes_mapped,
- &total_wqe_bytes, !requestor);
+ ret = pagefault_data_segments(dev, pfault, qp, wqe, wqe_end,
+ &bytes_mapped, &total_wqe_bytes,
+ !requestor);
if (ret == -EAGAIN) {
+ resume_with_error = 0;
goto resolve_page_fault;
} else if (ret < 0 || total_wqe_bytes > bytes_mapped) {
- mlx5_ib_err(dev, "Error getting user pages for page fault. Error: 0x%x\n",
- -ret);
- resume_with_error = 1;
+ if (ret != -ENOENT)
+ mlx5_ib_err(dev, "Error getting user pages for page fault. Error: %d\n",
+ ret);
goto resolve_page_fault;
}
+ resume_with_error = 0;
resolve_page_fault:
- mlx5_ib_page_fault_resume(qp, pfault, resume_with_error);
- mlx5_ib_dbg(dev, "PAGE FAULT completed. QP 0x%x resume_with_error=%d, flags: 0x%x\n",
- qpn, resume_with_error,
- pfault->mpfault.flags);
-
+ mlx5_ib_page_fault_resume(dev, pfault, resume_with_error);
+ mlx5_ib_dbg(dev, "PAGE FAULT completed. QP 0x%x resume_with_error=%d, type: 0x%x\n",
+ pfault->token, resume_with_error,
+ pfault->type);
free_page((unsigned long)buffer);
}
(address & PAGE_MASK)) >> PAGE_SHIFT;
}
-static void mlx5_ib_mr_rdma_pfault_handler(struct mlx5_ib_qp *qp,
- struct mlx5_ib_pfault *pfault)
+static void mlx5_ib_mr_rdma_pfault_handler(struct mlx5_ib_dev *dev,
+ struct mlx5_pagefault *pfault)
{
- struct mlx5_pagefault *mpfault = &pfault->mpfault;
u64 address;
u32 length;
- u32 prefetch_len = mpfault->bytes_committed;
+ u32 prefetch_len = pfault->bytes_committed;
int prefetch_activated = 0;
- u32 rkey = mpfault->rdma.r_key;
+ u32 rkey = pfault->rdma.r_key;
int ret;
/* The RDMA responder handler handles the page fault in two parts.
* prefetches more pages. The second operation cannot use the pfault
* context and therefore uses the dummy_pfault context allocated on
* the stack */
- struct mlx5_ib_pfault dummy_pfault = {};
+ pfault->rdma.rdma_va += pfault->bytes_committed;
+ pfault->rdma.rdma_op_len -= min(pfault->bytes_committed,
+ pfault->rdma.rdma_op_len);
+ pfault->bytes_committed = 0;
- dummy_pfault.mpfault.bytes_committed = 0;
-
- mpfault->rdma.rdma_va += mpfault->bytes_committed;
- mpfault->rdma.rdma_op_len -= min(mpfault->bytes_committed,
- mpfault->rdma.rdma_op_len);
- mpfault->bytes_committed = 0;
-
- address = mpfault->rdma.rdma_va;
- length = mpfault->rdma.rdma_op_len;
+ address = pfault->rdma.rdma_va;
+ length = pfault->rdma.rdma_op_len;
/* For some operations, the hardware cannot tell the exact message
* length, and in those cases it reports zero. Use prefetch
* logic. */
if (length == 0) {
prefetch_activated = 1;
- length = mpfault->rdma.packet_size;
+ length = pfault->rdma.packet_size;
prefetch_len = min(MAX_PREFETCH_LEN, prefetch_len);
}
- ret = pagefault_single_data_segment(qp, pfault, rkey, address, length,
- NULL);
+ ret = pagefault_single_data_segment(dev, rkey, address, length,
+ &pfault->bytes_committed, NULL);
if (ret == -EAGAIN) {
/* We're racing with an invalidation, don't prefetch */
prefetch_activated = 0;
} else if (ret < 0 || pages_in_range(address, length) > ret) {
- mlx5_ib_page_fault_resume(qp, pfault, 1);
+ mlx5_ib_page_fault_resume(dev, pfault, 1);
+ if (ret != -ENOENT)
+ mlx5_ib_warn(dev, "PAGE FAULT error %d. QP 0x%x, type: 0x%x\n",
+ ret, pfault->token, pfault->type);
return;
}
- mlx5_ib_page_fault_resume(qp, pfault, 0);
+ mlx5_ib_page_fault_resume(dev, pfault, 0);
+ mlx5_ib_dbg(dev, "PAGE FAULT completed. QP 0x%x, type: 0x%x, prefetch_activated: %d\n",
+ pfault->token, pfault->type,
+ prefetch_activated);
/* At this point, there might be a new pagefault already arriving in
* the eq, switch to the dummy pagefault for the rest of the
* work-queue is being fenced. */
if (prefetch_activated) {
- ret = pagefault_single_data_segment(qp, &dummy_pfault, rkey,
- address,
+ u32 bytes_committed = 0;
+
+ ret = pagefault_single_data_segment(dev, rkey, address,
prefetch_len,
- NULL);
+ &bytes_committed, NULL);
if (ret < 0) {
- pr_warn("Prefetch failed (ret = %d, prefetch_activated = %d) for QPN %d, address: 0x%.16llx, length = 0x%.16x\n",
- ret, prefetch_activated,
- qp->ibqp.qp_num, address, prefetch_len);
+ mlx5_ib_warn(dev, "Prefetch failed. ret: %d, QP 0x%x, address: 0x%.16llx, length = 0x%.16x\n",
+ ret, pfault->token, address,
+ prefetch_len);
}
}
}
-void mlx5_ib_mr_pfault_handler(struct mlx5_ib_qp *qp,
- struct mlx5_ib_pfault *pfault)
+void mlx5_ib_pfault(struct mlx5_core_dev *mdev, void *context,
+ struct mlx5_pagefault *pfault)
{
- u8 event_subtype = pfault->mpfault.event_subtype;
+ struct mlx5_ib_dev *dev = context;
+ u8 event_subtype = pfault->event_subtype;
switch (event_subtype) {
case MLX5_PFAULT_SUBTYPE_WQE:
- mlx5_ib_mr_wqe_pfault_handler(qp, pfault);
+ mlx5_ib_mr_wqe_pfault_handler(dev, pfault);
break;
case MLX5_PFAULT_SUBTYPE_RDMA:
- mlx5_ib_mr_rdma_pfault_handler(qp, pfault);
+ mlx5_ib_mr_rdma_pfault_handler(dev, pfault);
break;
default:
- pr_warn("Invalid page fault event subtype: 0x%x\n",
- event_subtype);
- mlx5_ib_page_fault_resume(qp, pfault, 1);
- break;
+ mlx5_ib_err(dev, "Invalid page fault event subtype: 0x%x\n",
+ event_subtype);
+ mlx5_ib_page_fault_resume(dev, pfault, 1);
}
}
-static void mlx5_ib_qp_pfault_action(struct work_struct *work)
-{
- struct mlx5_ib_pfault *pfault = container_of(work,
- struct mlx5_ib_pfault,
- work);
- enum mlx5_ib_pagefault_context context =
- mlx5_ib_get_pagefault_context(&pfault->mpfault);
- struct mlx5_ib_qp *qp = container_of(pfault, struct mlx5_ib_qp,
- pagefaults[context]);
- mlx5_ib_mr_pfault_handler(qp, pfault);
-}
-
-void mlx5_ib_qp_disable_pagefaults(struct mlx5_ib_qp *qp)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&qp->disable_page_faults_lock, flags);
- qp->disable_page_faults = 1;
- spin_unlock_irqrestore(&qp->disable_page_faults_lock, flags);
-
- /*
- * Note that at this point, we are guarenteed that no more
- * work queue elements will be posted to the work queue with
- * the QP we are closing.
- */
- flush_workqueue(mlx5_ib_page_fault_wq);
-}
-
-void mlx5_ib_qp_enable_pagefaults(struct mlx5_ib_qp *qp)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&qp->disable_page_faults_lock, flags);
- qp->disable_page_faults = 0;
- spin_unlock_irqrestore(&qp->disable_page_faults_lock, flags);
-}
-
-static void mlx5_ib_pfault_handler(struct mlx5_core_qp *qp,
- struct mlx5_pagefault *pfault)
-{
- /*
- * Note that we will only get one fault event per QP per context
- * (responder/initiator, read/write), until we resolve the page fault
- * with the mlx5_ib_page_fault_resume command. Since this function is
- * called from within the work element, there is no risk of missing
- * events.
- */
- struct mlx5_ib_qp *mibqp = to_mibqp(qp);
- enum mlx5_ib_pagefault_context context =
- mlx5_ib_get_pagefault_context(pfault);
- struct mlx5_ib_pfault *qp_pfault = &mibqp->pagefaults[context];
-
- qp_pfault->mpfault = *pfault;
-
- /* No need to stop interrupts here since we are in an interrupt */
- spin_lock(&mibqp->disable_page_faults_lock);
- if (!mibqp->disable_page_faults)
- queue_work(mlx5_ib_page_fault_wq, &qp_pfault->work);
- spin_unlock(&mibqp->disable_page_faults_lock);
-}
-
-void mlx5_ib_odp_create_qp(struct mlx5_ib_qp *qp)
-{
- int i;
-
- qp->disable_page_faults = 1;
- spin_lock_init(&qp->disable_page_faults_lock);
-
- qp->trans_qp.base.mqp.pfault_handler = mlx5_ib_pfault_handler;
-
- for (i = 0; i < MLX5_IB_PAGEFAULT_CONTEXTS; ++i)
- INIT_WORK(&qp->pagefaults[i].work, mlx5_ib_qp_pfault_action);
-}
-
int mlx5_ib_odp_init_one(struct mlx5_ib_dev *ibdev)
{
int ret;
cleanup_srcu_struct(&ibdev->mr_srcu);
}
-int __init mlx5_ib_odp_init(void)
-{
- mlx5_ib_page_fault_wq = alloc_ordered_workqueue("mlx5_ib_page_faults",
- WQ_MEM_RECLAIM);
- if (!mlx5_ib_page_fault_wq)
- return -ENOMEM;
-
- return 0;
-}
-
-void mlx5_ib_odp_cleanup(void)
-{
- destroy_workqueue(mlx5_ib_page_fault_wq);
-}
&qp->raw_packet_qp.rq.base :
&qp->trans_qp.base;
- if (init_attr->qp_type != IB_QPT_RAW_PACKET)
- mlx5_ib_odp_create_qp(qp);
-
mutex_init(&qp->mutex);
spin_lock_init(&qp->sq.lock);
spin_lock_init(&qp->rq.lock);
if (qp->state != IB_QPS_RESET) {
if (qp->ibqp.qp_type != IB_QPT_RAW_PACKET) {
- mlx5_ib_qp_disable_pagefaults(qp);
err = mlx5_core_qp_modify(dev->mdev,
MLX5_CMD_OP_2RST_QP, 0,
NULL, &base->mqp);
if (mlx5_st < 0)
goto out;
- /* If moving to a reset or error state, we must disable page faults on
- * this QP and flush all current page faults. Otherwise a stale page
- * fault may attempt to work on this QP after it is reset and moved
- * again to RTS, and may cause the driver and the device to get out of
- * sync. */
- if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR &&
- (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR) &&
- (qp->ibqp.qp_type != IB_QPT_RAW_PACKET))
- mlx5_ib_qp_disable_pagefaults(qp);
-
if (mlx5_cur >= MLX5_QP_NUM_STATE || mlx5_new >= MLX5_QP_NUM_STATE ||
!optab[mlx5_cur][mlx5_new])
goto out;
if (err)
goto out;
- if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT &&
- (qp->ibqp.qp_type != IB_QPT_RAW_PACKET))
- mlx5_ib_qp_enable_pagefaults(qp);
-
qp->state = new_state;
if (attr_mask & IB_QP_ACCESS_FLAGS)
return mlx5_ib_gsi_query_qp(ibqp, qp_attr, qp_attr_mask,
qp_init_attr);
-#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
- /*
- * Wait for any outstanding page faults, in case the user frees memory
- * based upon this query's result.
- */
- flush_workqueue(mlx5_ib_page_fault_wq);
-#endif
-
mutex_lock(&qp->mutex);
if (qp->ibqp.qp_type == IB_QPT_RAW_PACKET) {
if (dev_ctx->context) {
spin_lock_irq(&priv->ctx_lock);
list_add_tail(&dev_ctx->list, &priv->ctx_list);
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+ if (dev_ctx->intf->pfault) {
+ if (priv->pfault) {
+ mlx5_core_err(dev, "multiple page fault handlers not supported");
+ } else {
+ priv->pfault_ctx = dev_ctx->context;
+ priv->pfault = dev_ctx->intf->pfault;
+ }
+ }
+#endif
spin_unlock_irq(&priv->ctx_lock);
} else {
kfree(dev_ctx);
if (!dev_ctx)
return;
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+ spin_lock_irq(&priv->ctx_lock);
+ if (priv->pfault == dev_ctx->intf->pfault)
+ priv->pfault = NULL;
+ spin_unlock_irq(&priv->ctx_lock);
+
+ synchronize_srcu(&priv->pfault_srcu);
+#endif
+
spin_lock_irq(&priv->ctx_lock);
list_del(&dev_ctx->list);
spin_unlock_irq(&priv->ctx_lock);
spin_unlock_irqrestore(&priv->ctx_lock, flags);
}
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+void mlx5_core_page_fault(struct mlx5_core_dev *dev,
+ struct mlx5_pagefault *pfault)
+{
+ struct mlx5_priv *priv = &dev->priv;
+ int srcu_idx;
+
+ srcu_idx = srcu_read_lock(&priv->pfault_srcu);
+ if (priv->pfault)
+ priv->pfault(dev, priv->pfault_ctx, pfault);
+ srcu_read_unlock(&priv->pfault_srcu, srcu_idx);
+}
+#endif
+
void mlx5_dev_list_lock(void)
{
mutex_lock(&mlx5_intf_mutex);
MLX5_NUM_SPARE_EQE = 0x80,
MLX5_NUM_ASYNC_EQE = 0x100,
MLX5_NUM_CMD_EQE = 32,
+ MLX5_NUM_PF_DRAIN = 64,
};
enum {
mb();
}
-static int mlx5_eq_int(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+static void eqe_pf_action(struct work_struct *work)
+{
+ struct mlx5_pagefault *pfault = container_of(work,
+ struct mlx5_pagefault,
+ work);
+ struct mlx5_eq *eq = pfault->eq;
+
+ mlx5_core_page_fault(eq->dev, pfault);
+ mempool_free(pfault, eq->pf_ctx.pool);
+}
+
+static void eq_pf_process(struct mlx5_eq *eq)
+{
+ struct mlx5_core_dev *dev = eq->dev;
+ struct mlx5_eqe_page_fault *pf_eqe;
+ struct mlx5_pagefault *pfault;
+ struct mlx5_eqe *eqe;
+ int set_ci = 0;
+
+ while ((eqe = next_eqe_sw(eq))) {
+ pfault = mempool_alloc(eq->pf_ctx.pool, GFP_ATOMIC);
+ if (!pfault) {
+ schedule_work(&eq->pf_ctx.work);
+ break;
+ }
+
+ dma_rmb();
+ pf_eqe = &eqe->data.page_fault;
+ pfault->event_subtype = eqe->sub_type;
+ pfault->bytes_committed = be32_to_cpu(pf_eqe->bytes_committed);
+
+ mlx5_core_dbg(dev,
+ "PAGE_FAULT: subtype: 0x%02x, bytes_committed: 0x%06x\n",
+ eqe->sub_type, pfault->bytes_committed);
+
+ switch (eqe->sub_type) {
+ case MLX5_PFAULT_SUBTYPE_RDMA:
+ /* RDMA based event */
+ pfault->type =
+ be32_to_cpu(pf_eqe->rdma.pftype_token) >> 24;
+ pfault->token =
+ be32_to_cpu(pf_eqe->rdma.pftype_token) &
+ MLX5_24BIT_MASK;
+ pfault->rdma.r_key =
+ be32_to_cpu(pf_eqe->rdma.r_key);
+ pfault->rdma.packet_size =
+ be16_to_cpu(pf_eqe->rdma.packet_length);
+ pfault->rdma.rdma_op_len =
+ be32_to_cpu(pf_eqe->rdma.rdma_op_len);
+ pfault->rdma.rdma_va =
+ be64_to_cpu(pf_eqe->rdma.rdma_va);
+ mlx5_core_dbg(dev,
+ "PAGE_FAULT: type:0x%x, token: 0x%06x, r_key: 0x%08x\n",
+ pfault->type, pfault->token,
+ pfault->rdma.r_key);
+ mlx5_core_dbg(dev,
+ "PAGE_FAULT: rdma_op_len: 0x%08x, rdma_va: 0x%016llx\n",
+ pfault->rdma.rdma_op_len,
+ pfault->rdma.rdma_va);
+ break;
+
+ case MLX5_PFAULT_SUBTYPE_WQE:
+ /* WQE based event */
+ pfault->type =
+ be32_to_cpu(pf_eqe->wqe.pftype_wq) >> 24;
+ pfault->token =
+ be32_to_cpu(pf_eqe->wqe.token);
+ pfault->wqe.wq_num =
+ be32_to_cpu(pf_eqe->wqe.pftype_wq) &
+ MLX5_24BIT_MASK;
+ pfault->wqe.wqe_index =
+ be16_to_cpu(pf_eqe->wqe.wqe_index);
+ pfault->wqe.packet_size =
+ be16_to_cpu(pf_eqe->wqe.packet_length);
+ mlx5_core_dbg(dev,
+ "PAGE_FAULT: type:0x%x, token: 0x%06x, wq_num: 0x%06x, wqe_index: 0x%04x\n",
+ pfault->type, pfault->token,
+ pfault->wqe.wq_num,
+ pfault->wqe.wqe_index);
+ break;
+
+ default:
+ mlx5_core_warn(dev,
+ "Unsupported page fault event sub-type: 0x%02hhx\n",
+ eqe->sub_type);
+ /* Unsupported page faults should still be
+ * resolved by the page fault handler
+ */
+ }
+
+ pfault->eq = eq;
+ INIT_WORK(&pfault->work, eqe_pf_action);
+ queue_work(eq->pf_ctx.wq, &pfault->work);
+
+ ++eq->cons_index;
+ ++set_ci;
+
+ if (unlikely(set_ci >= MLX5_NUM_SPARE_EQE)) {
+ eq_update_ci(eq, 0);
+ set_ci = 0;
+ }
+ }
+
+ eq_update_ci(eq, 1);
+}
+
+static irqreturn_t mlx5_eq_pf_int(int irq, void *eq_ptr)
+{
+ struct mlx5_eq *eq = eq_ptr;
+ unsigned long flags;
+
+ if (spin_trylock_irqsave(&eq->pf_ctx.lock, flags)) {
+ eq_pf_process(eq);
+ spin_unlock_irqrestore(&eq->pf_ctx.lock, flags);
+ } else {
+ schedule_work(&eq->pf_ctx.work);
+ }
+
+ return IRQ_HANDLED;
+}
+
+/* mempool_refill() was proposed but unfortunately wasn't accepted
+ * http://lkml.iu.edu/hypermail/linux/kernel/1512.1/05073.html
+ * Chip workaround.
+ */
+static void mempool_refill(mempool_t *pool)
+{
+ while (pool->curr_nr < pool->min_nr)
+ mempool_free(mempool_alloc(pool, GFP_KERNEL), pool);
+}
+
+static void eq_pf_action(struct work_struct *work)
+{
+ struct mlx5_eq *eq = container_of(work, struct mlx5_eq, pf_ctx.work);
+
+ mempool_refill(eq->pf_ctx.pool);
+
+ spin_lock_irq(&eq->pf_ctx.lock);
+ eq_pf_process(eq);
+ spin_unlock_irq(&eq->pf_ctx.lock);
+}
+
+static int init_pf_ctx(struct mlx5_eq_pagefault *pf_ctx, const char *name)
{
+ spin_lock_init(&pf_ctx->lock);
+ INIT_WORK(&pf_ctx->work, eq_pf_action);
+
+ pf_ctx->wq = alloc_ordered_workqueue(name,
+ WQ_MEM_RECLAIM);
+ if (!pf_ctx->wq)
+ return -ENOMEM;
+
+ pf_ctx->pool = mempool_create_kmalloc_pool
+ (MLX5_NUM_PF_DRAIN, sizeof(struct mlx5_pagefault));
+ if (!pf_ctx->pool)
+ goto err_wq;
+
+ return 0;
+err_wq:
+ destroy_workqueue(pf_ctx->wq);
+ return -ENOMEM;
+}
+
+int mlx5_core_page_fault_resume(struct mlx5_core_dev *dev, u32 token,
+ u32 wq_num, u8 type, int error)
+{
+ u32 out[MLX5_ST_SZ_DW(page_fault_resume_out)] = {0};
+ u32 in[MLX5_ST_SZ_DW(page_fault_resume_in)] = {0};
+
+ MLX5_SET(page_fault_resume_in, in, opcode,
+ MLX5_CMD_OP_PAGE_FAULT_RESUME);
+ MLX5_SET(page_fault_resume_in, in, error, !!error);
+ MLX5_SET(page_fault_resume_in, in, page_fault_type, type);
+ MLX5_SET(page_fault_resume_in, in, wq_number, wq_num);
+ MLX5_SET(page_fault_resume_in, in, token, token);
+
+ return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+}
+EXPORT_SYMBOL_GPL(mlx5_core_page_fault_resume);
+#endif
+
+static irqreturn_t mlx5_eq_int(int irq, void *eq_ptr)
+{
+ struct mlx5_eq *eq = eq_ptr;
+ struct mlx5_core_dev *dev = eq->dev;
struct mlx5_eqe *eqe;
- int eqes_found = 0;
int set_ci = 0;
u32 cqn = -1;
u32 rsn;
}
break;
-#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
- case MLX5_EVENT_TYPE_PAGE_FAULT:
- mlx5_eq_pagefault(dev, eqe);
- break;
-#endif
-
#ifdef CONFIG_MLX5_CORE_EN
case MLX5_EVENT_TYPE_NIC_VPORT_CHANGE:
mlx5_eswitch_vport_event(dev->priv.eswitch, eqe);
}
++eq->cons_index;
- eqes_found = 1;
++set_ci;
/* The HCA will think the queue has overflowed if we
if (cqn != -1)
tasklet_schedule(&eq->tasklet_ctx.task);
- return eqes_found;
-}
-
-static irqreturn_t mlx5_msix_handler(int irq, void *eq_ptr)
-{
- struct mlx5_eq *eq = eq_ptr;
- struct mlx5_core_dev *dev = eq->dev;
-
- mlx5_eq_int(dev, eq);
-
- /* MSI-X vectors always belong to us */
return IRQ_HANDLED;
}
}
int mlx5_create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, u8 vecidx,
- int nent, u64 mask, const char *name, struct mlx5_uar *uar)
+ int nent, u64 mask, const char *name,
+ struct mlx5_uar *uar, enum mlx5_eq_type type)
{
u32 out[MLX5_ST_SZ_DW(create_eq_out)] = {0};
struct mlx5_priv *priv = &dev->priv;
+ irq_handler_t handler;
__be64 *pas;
void *eqc;
int inlen;
u32 *in;
int err;
+ eq->type = type;
eq->nent = roundup_pow_of_two(nent + MLX5_NUM_SPARE_EQE);
eq->cons_index = 0;
err = mlx5_buf_alloc(dev, eq->nent * MLX5_EQE_SIZE, &eq->buf);
if (err)
return err;
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+ if (type == MLX5_EQ_TYPE_PF)
+ handler = mlx5_eq_pf_int;
+ else
+#endif
+ handler = mlx5_eq_int;
+
init_eq_buf(eq);
inlen = MLX5_ST_SZ_BYTES(create_eq_in) +
eq->irqn = priv->msix_arr[vecidx].vector;
eq->dev = dev;
eq->doorbell = uar->map + MLX5_EQ_DOORBEL_OFFSET;
- err = request_irq(eq->irqn, mlx5_msix_handler, 0,
+ err = request_irq(eq->irqn, handler, 0,
priv->irq_info[vecidx].name, eq);
if (err)
goto err_eq;
if (err)
goto err_irq;
- INIT_LIST_HEAD(&eq->tasklet_ctx.list);
- INIT_LIST_HEAD(&eq->tasklet_ctx.process_list);
- spin_lock_init(&eq->tasklet_ctx.lock);
- tasklet_init(&eq->tasklet_ctx.task, mlx5_cq_tasklet_cb,
- (unsigned long)&eq->tasklet_ctx);
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+ if (type == MLX5_EQ_TYPE_PF) {
+ err = init_pf_ctx(&eq->pf_ctx, name);
+ if (err)
+ goto err_irq;
+ } else
+#endif
+ {
+ INIT_LIST_HEAD(&eq->tasklet_ctx.list);
+ INIT_LIST_HEAD(&eq->tasklet_ctx.process_list);
+ spin_lock_init(&eq->tasklet_ctx.lock);
+ tasklet_init(&eq->tasklet_ctx.task, mlx5_cq_tasklet_cb,
+ (unsigned long)&eq->tasklet_ctx);
+ }
/* EQs are created in ARMED state
*/
mlx5_core_warn(dev, "failed to destroy a previously created eq: eqn %d\n",
eq->eqn);
synchronize_irq(eq->irqn);
- tasklet_disable(&eq->tasklet_ctx.task);
+
+ if (eq->type == MLX5_EQ_TYPE_COMP) {
+ tasklet_disable(&eq->tasklet_ctx.task);
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+ } else if (eq->type == MLX5_EQ_TYPE_PF) {
+ cancel_work_sync(&eq->pf_ctx.work);
+ destroy_workqueue(eq->pf_ctx.wq);
+ mempool_destroy(eq->pf_ctx.pool);
+#endif
+ }
mlx5_buf_free(dev, &eq->buf);
return err;
u64 async_event_mask = MLX5_ASYNC_EVENT_MASK;
int err;
- if (MLX5_CAP_GEN(dev, pg))
- async_event_mask |= (1ull << MLX5_EVENT_TYPE_PAGE_FAULT);
if (MLX5_CAP_GEN(dev, port_type) == MLX5_CAP_PORT_TYPE_ETH &&
MLX5_CAP_GEN(dev, vport_group_manager) &&
err = mlx5_create_map_eq(dev, &table->cmd_eq, MLX5_EQ_VEC_CMD,
MLX5_NUM_CMD_EQE, 1ull << MLX5_EVENT_TYPE_CMD,
- "mlx5_cmd_eq", &dev->priv.uuari.uars[0]);
+ "mlx5_cmd_eq", &dev->priv.uuari.uars[0],
+ MLX5_EQ_TYPE_ASYNC);
if (err) {
mlx5_core_warn(dev, "failed to create cmd EQ %d\n", err);
return err;
err = mlx5_create_map_eq(dev, &table->async_eq, MLX5_EQ_VEC_ASYNC,
MLX5_NUM_ASYNC_EQE, async_event_mask,
- "mlx5_async_eq", &dev->priv.uuari.uars[0]);
+ "mlx5_async_eq", &dev->priv.uuari.uars[0],
+ MLX5_EQ_TYPE_ASYNC);
if (err) {
mlx5_core_warn(dev, "failed to create async EQ %d\n", err);
goto err1;
MLX5_EQ_VEC_PAGES,
/* TODO: sriov max_vf + */ 1,
1 << MLX5_EVENT_TYPE_PAGE_REQUEST, "mlx5_pages_eq",
- &dev->priv.uuari.uars[0]);
+ &dev->priv.uuari.uars[0],
+ MLX5_EQ_TYPE_ASYNC);
if (err) {
mlx5_core_warn(dev, "failed to create pages EQ %d\n", err);
goto err2;
}
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+ if (MLX5_CAP_GEN(dev, pg)) {
+ err = mlx5_create_map_eq(dev, &table->pfault_eq,
+ MLX5_EQ_VEC_PFAULT,
+ MLX5_NUM_ASYNC_EQE,
+ 1 << MLX5_EVENT_TYPE_PAGE_FAULT,
+ "mlx5_page_fault_eq",
+ &dev->priv.uuari.uars[0],
+ MLX5_EQ_TYPE_PF);
+ if (err) {
+ mlx5_core_warn(dev, "failed to create page fault EQ %d\n",
+ err);
+ goto err3;
+ }
+ }
+
return err;
+err3:
+ mlx5_destroy_unmap_eq(dev, &table->pages_eq);
+#else
+ return err;
+#endif
err2:
mlx5_destroy_unmap_eq(dev, &table->async_eq);
struct mlx5_eq_table *table = &dev->priv.eq_table;
int err;
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+ if (MLX5_CAP_GEN(dev, pg)) {
+ err = mlx5_destroy_unmap_eq(dev, &table->pfault_eq);
+ if (err)
+ return err;
+ }
+#endif
+
err = mlx5_destroy_unmap_eq(dev, &table->pages_eq);
if (err)
return err;
snprintf(name, MLX5_MAX_IRQ_NAME, "mlx5_comp%d", i);
err = mlx5_create_map_eq(dev, eq,
i + MLX5_EQ_VEC_COMP_BASE, nent, 0,
- name, &dev->priv.uuari.uars[0]);
+ name, &dev->priv.uuari.uars[0],
+ MLX5_EQ_TYPE_COMP);
if (err) {
kfree(eq);
goto clean;
spin_lock_init(&priv->ctx_lock);
mutex_init(&dev->pci_status_mutex);
mutex_init(&dev->intf_state_mutex);
+
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+ err = init_srcu_struct(&priv->pfault_srcu);
+ if (err) {
+ dev_err(&pdev->dev, "init_srcu_struct failed with error code %d\n",
+ err);
+ goto clean_dev;
+ }
+#endif
err = mlx5_pci_init(dev, priv);
if (err) {
dev_err(&pdev->dev, "mlx5_pci_init failed with error code %d\n", err);
- goto clean_dev;
+ goto clean_srcu;
}
err = mlx5_health_init(dev);
mlx5_health_cleanup(dev);
close_pci:
mlx5_pci_close(dev, priv);
+clean_srcu:
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+ cleanup_srcu_struct(&priv->pfault_srcu);
clean_dev:
+#endif
pci_set_drvdata(pdev, NULL);
devlink_free(devlink);
mlx5_pagealloc_cleanup(dev);
mlx5_health_cleanup(dev);
mlx5_pci_close(dev, priv);
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+ cleanup_srcu_struct(&priv->pfault_srcu);
+#endif
pci_set_drvdata(pdev, NULL);
devlink_free(devlink);
}
int mlx5_cmd_teardown_hca(struct mlx5_core_dev *dev);
void mlx5_core_event(struct mlx5_core_dev *dev, enum mlx5_dev_event event,
unsigned long param);
+void mlx5_core_page_fault(struct mlx5_core_dev *dev,
+ struct mlx5_pagefault *pfault);
void mlx5_port_module_event(struct mlx5_core_dev *dev, struct mlx5_eqe *eqe);
void mlx5_enter_error_state(struct mlx5_core_dev *dev);
void mlx5_disable_device(struct mlx5_core_dev *dev);
mlx5_core_put_rsc(common);
}
-#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
-void mlx5_eq_pagefault(struct mlx5_core_dev *dev, struct mlx5_eqe *eqe)
-{
- struct mlx5_eqe_page_fault *pf_eqe = &eqe->data.page_fault;
- int qpn = be32_to_cpu(pf_eqe->flags_qpn) & MLX5_QPN_MASK;
- struct mlx5_core_rsc_common *common = mlx5_get_rsc(dev, qpn);
- struct mlx5_core_qp *qp =
- container_of(common, struct mlx5_core_qp, common);
- struct mlx5_pagefault pfault;
-
- if (!qp) {
- mlx5_core_warn(dev, "ODP event for non-existent QP %06x\n",
- qpn);
- return;
- }
-
- pfault.event_subtype = eqe->sub_type;
- pfault.flags = (be32_to_cpu(pf_eqe->flags_qpn) >> MLX5_QPN_BITS) &
- (MLX5_PFAULT_REQUESTOR | MLX5_PFAULT_WRITE | MLX5_PFAULT_RDMA);
- pfault.bytes_committed = be32_to_cpu(
- pf_eqe->bytes_committed);
-
- mlx5_core_dbg(dev,
- "PAGE_FAULT: subtype: 0x%02x, flags: 0x%02x,\n",
- eqe->sub_type, pfault.flags);
-
- switch (eqe->sub_type) {
- case MLX5_PFAULT_SUBTYPE_RDMA:
- /* RDMA based event */
- pfault.rdma.r_key =
- be32_to_cpu(pf_eqe->rdma.r_key);
- pfault.rdma.packet_size =
- be16_to_cpu(pf_eqe->rdma.packet_length);
- pfault.rdma.rdma_op_len =
- be32_to_cpu(pf_eqe->rdma.rdma_op_len);
- pfault.rdma.rdma_va =
- be64_to_cpu(pf_eqe->rdma.rdma_va);
- mlx5_core_dbg(dev,
- "PAGE_FAULT: qpn: 0x%06x, r_key: 0x%08x,\n",
- qpn, pfault.rdma.r_key);
- mlx5_core_dbg(dev,
- "PAGE_FAULT: rdma_op_len: 0x%08x,\n",
- pfault.rdma.rdma_op_len);
- mlx5_core_dbg(dev,
- "PAGE_FAULT: rdma_va: 0x%016llx,\n",
- pfault.rdma.rdma_va);
- mlx5_core_dbg(dev,
- "PAGE_FAULT: bytes_committed: 0x%06x\n",
- pfault.bytes_committed);
- break;
-
- case MLX5_PFAULT_SUBTYPE_WQE:
- /* WQE based event */
- pfault.wqe.wqe_index =
- be16_to_cpu(pf_eqe->wqe.wqe_index);
- pfault.wqe.packet_size =
- be16_to_cpu(pf_eqe->wqe.packet_length);
- mlx5_core_dbg(dev,
- "PAGE_FAULT: qpn: 0x%06x, wqe_index: 0x%04x,\n",
- qpn, pfault.wqe.wqe_index);
- mlx5_core_dbg(dev,
- "PAGE_FAULT: bytes_committed: 0x%06x\n",
- pfault.bytes_committed);
- break;
-
- default:
- mlx5_core_warn(dev,
- "Unsupported page fault event sub-type: 0x%02hhx, QP %06x\n",
- eqe->sub_type, qpn);
- /* Unsupported page faults should still be resolved by the
- * page fault handler
- */
- }
-
- if (qp->pfault_handler) {
- qp->pfault_handler(qp, &pfault);
- } else {
- mlx5_core_err(dev,
- "ODP event for QP %08x, without a fault handler in QP\n",
- qpn);
- /* Page fault will remain unresolved. QP will hang until it is
- * destroyed
- */
- }
-
- mlx5_core_put_rsc(common);
-}
-#endif
-
static int create_qprqsq_common(struct mlx5_core_dev *dev,
struct mlx5_core_qp *qp,
int rsc_type)
}
EXPORT_SYMBOL_GPL(mlx5_core_xrcd_dealloc);
-#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
-int mlx5_core_page_fault_resume(struct mlx5_core_dev *dev, u32 qpn,
- u8 flags, int error)
-{
- u32 out[MLX5_ST_SZ_DW(page_fault_resume_out)] = {0};
- u32 in[MLX5_ST_SZ_DW(page_fault_resume_in)] = {0};
-
- MLX5_SET(page_fault_resume_in, in, opcode,
- MLX5_CMD_OP_PAGE_FAULT_RESUME);
- MLX5_SET(page_fault_resume_in, in, wq_number, qpn);
- MLX5_SET(page_fault_resume_in, in, page_fault_type, flags);
- if (error)
- MLX5_SET(page_fault_resume_in, in, error, 1);
-
- return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
-}
-EXPORT_SYMBOL_GPL(mlx5_core_page_fault_resume);
-#endif
-
int mlx5_core_create_rq_tracked(struct mlx5_core_dev *dev, u32 *in, int inlen,
struct mlx5_core_qp *rq)
{
__be16 wqe_index;
u16 reserved2;
__be16 packet_length;
- u8 reserved3[12];
+ __be32 token;
+ u8 reserved4[8];
+ __be32 pftype_wq;
} __packed wqe;
struct {
__be32 r_key;
__be16 packet_length;
__be32 rdma_op_len;
__be64 rdma_va;
+ __be32 pftype_token;
} __packed rdma;
} __packed;
- __be32 flags_qpn;
} __packed;
struct mlx5_eqe_vport_change {
#include <linux/vmalloc.h>
#include <linux/radix-tree.h>
#include <linux/workqueue.h>
+#include <linux/mempool.h>
#include <linux/interrupt.h>
#include <linux/mlx5/device.h>
MLX5_EQ_VEC_PAGES = 0,
MLX5_EQ_VEC_CMD = 1,
MLX5_EQ_VEC_ASYNC = 2,
+ MLX5_EQ_VEC_PFAULT = 3,
MLX5_EQ_VEC_COMP_BASE,
};
MLX5_PORT_DOWN = 2,
};
+enum mlx5_eq_type {
+ MLX5_EQ_TYPE_COMP,
+ MLX5_EQ_TYPE_ASYNC,
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+ MLX5_EQ_TYPE_PF,
+#endif
+};
+
struct mlx5_uuar_info {
struct mlx5_uar *uars;
int num_uars;
spinlock_t lock;
};
+struct mlx5_eq_pagefault {
+ struct work_struct work;
+ /* Pagefaults lock */
+ spinlock_t lock;
+ struct workqueue_struct *wq;
+ mempool_t *pool;
+};
+
struct mlx5_eq {
struct mlx5_core_dev *dev;
__be32 __iomem *doorbell;
struct list_head list;
int index;
struct mlx5_rsc_debug *dbg;
- struct mlx5_eq_tasklet tasklet_ctx;
+ enum mlx5_eq_type type;
+ union {
+ struct mlx5_eq_tasklet tasklet_ctx;
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+ struct mlx5_eq_pagefault pf_ctx;
+#endif
+ };
};
struct mlx5_core_psv {
u32 pd;
};
+#define MLX5_24BIT_MASK ((1 << 24) - 1)
+
enum mlx5_res_type {
MLX5_RES_QP = MLX5_EVENT_QUEUE_TYPE_QP,
MLX5_RES_RQ = MLX5_EVENT_QUEUE_TYPE_RQ,
struct mlx5_eq pages_eq;
struct mlx5_eq async_eq;
struct mlx5_eq cmd_eq;
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+ struct mlx5_eq pfault_eq;
+#endif
int num_comp_vectors;
/* protect EQs list
*/
struct mlx5_eswitch;
struct mlx5_lag;
+struct mlx5_pagefault;
struct mlx5_rl_entry {
u32 rate;
struct mlx5_rl_table rl_table;
struct mlx5_port_module_event_stats pme_stats;
+
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+ void (*pfault)(struct mlx5_core_dev *dev,
+ void *context,
+ struct mlx5_pagefault *pfault);
+ void *pfault_ctx;
+ struct srcu_struct pfault_srcu;
+#endif
};
enum mlx5_device_state {
MLX5_PCI_STATUS_ENABLED,
};
+enum mlx5_pagefault_type_flags {
+ MLX5_PFAULT_REQUESTOR = 1 << 0,
+ MLX5_PFAULT_WRITE = 1 << 1,
+ MLX5_PFAULT_RDMA = 1 << 2,
+};
+
+/* Contains the details of a pagefault. */
+struct mlx5_pagefault {
+ u32 bytes_committed;
+ u32 token;
+ u8 event_subtype;
+ u8 type;
+ union {
+ /* Initiator or send message responder pagefault details. */
+ struct {
+ /* Received packet size, only valid for responders. */
+ u32 packet_size;
+ /*
+ * Number of resource holding WQE, depends on type.
+ */
+ u32 wq_num;
+ /*
+ * WQE index. Refers to either the send queue or
+ * receive queue, according to event_subtype.
+ */
+ u16 wqe_index;
+ } wqe;
+ /* RDMA responder pagefault details */
+ struct {
+ u32 r_key;
+ /*
+ * Received packet size, minimal size page fault
+ * resolution required for forward progress.
+ */
+ u32 packet_size;
+ u32 rdma_op_len;
+ u64 rdma_va;
+ } rdma;
+ };
+
+ struct mlx5_eq *eq;
+ struct work_struct work;
+};
+
struct mlx5_td {
struct list_head tirs_list;
u32 tdn;
void mlx5_fill_page_frag_array(struct mlx5_frag_buf *frag_buf, __be64 *pas);
void mlx5_cq_completion(struct mlx5_core_dev *dev, u32 cqn);
void mlx5_rsc_event(struct mlx5_core_dev *dev, u32 rsn, int event_type);
-#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
-void mlx5_eq_pagefault(struct mlx5_core_dev *dev, struct mlx5_eqe *eqe);
-#endif
void mlx5_srq_event(struct mlx5_core_dev *dev, u32 srqn, int event_type);
struct mlx5_core_srq *mlx5_core_get_srq(struct mlx5_core_dev *dev, u32 srqn);
void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, u64 vec);
void mlx5_cq_event(struct mlx5_core_dev *dev, u32 cqn, int event_type);
int mlx5_create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, u8 vecidx,
- int nent, u64 mask, const char *name, struct mlx5_uar *uar);
+ int nent, u64 mask, const char *name,
+ struct mlx5_uar *uar, enum mlx5_eq_type type);
int mlx5_destroy_unmap_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq);
int mlx5_start_eqs(struct mlx5_core_dev *dev);
int mlx5_stop_eqs(struct mlx5_core_dev *dev);
struct mlx5_odp_caps *odp_caps);
int mlx5_core_query_ib_ppcnt(struct mlx5_core_dev *dev,
u8 port_num, void *out, size_t sz);
+#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
+int mlx5_core_page_fault_resume(struct mlx5_core_dev *dev, u32 token,
+ u32 wq_num, u8 type, int error);
+#endif
int mlx5_init_rl_table(struct mlx5_core_dev *dev);
void mlx5_cleanup_rl_table(struct mlx5_core_dev *dev);
void (*detach)(struct mlx5_core_dev *dev, void *context);
void (*event)(struct mlx5_core_dev *dev, void *context,
enum mlx5_dev_event event, unsigned long param);
+ void (*pfault)(struct mlx5_core_dev *dev,
+ void *context,
+ struct mlx5_pagefault *pfault);
void * (*get_dev)(void *context);
int protocol;
struct list_head list;
#define MLX5_BSF_APPTAG_ESCAPE 0x1
#define MLX5_BSF_APPREF_ESCAPE 0x2
-#define MLX5_QPN_BITS 24
-#define MLX5_QPN_MASK ((1 << MLX5_QPN_BITS) - 1)
-
enum mlx5_qp_optpar {
MLX5_QP_OPTPAR_ALT_ADDR_PATH = 1 << 0,
MLX5_QP_OPTPAR_RRE = 1 << 1,
__be16 num_entries;
};
-enum mlx5_pagefault_flags {
- MLX5_PFAULT_REQUESTOR = 1 << 0,
- MLX5_PFAULT_WRITE = 1 << 1,
- MLX5_PFAULT_RDMA = 1 << 2,
-};
-
-/* Contains the details of a pagefault. */
-struct mlx5_pagefault {
- u32 bytes_committed;
- u8 event_subtype;
- enum mlx5_pagefault_flags flags;
- union {
- /* Initiator or send message responder pagefault details. */
- struct {
- /* Received packet size, only valid for responders. */
- u32 packet_size;
- /*
- * WQE index. Refers to either the send queue or
- * receive queue, according to event_subtype.
- */
- u16 wqe_index;
- } wqe;
- /* RDMA responder pagefault details */
- struct {
- u32 r_key;
- /*
- * Received packet size, minimal size page fault
- * resolution required for forward progress.
- */
- u32 packet_size;
- u32 rdma_op_len;
- u64 rdma_va;
- } rdma;
- };
-};
-
struct mlx5_core_qp {
struct mlx5_core_rsc_common common; /* must be first */
void (*event) (struct mlx5_core_qp *, int);
- void (*pfault_handler)(struct mlx5_core_qp *, struct mlx5_pagefault *);
int qpn;
struct mlx5_rsc_debug *dbg;
int pid;
void mlx5_cleanup_qp_table(struct mlx5_core_dev *dev);
int mlx5_debug_qp_add(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp);
void mlx5_debug_qp_remove(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp);
-#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
-int mlx5_core_page_fault_resume(struct mlx5_core_dev *dev, u32 qpn,
- u8 context, int error);
-#endif
int mlx5_core_create_rq_tracked(struct mlx5_core_dev *dev, u32 *in, int inlen,
struct mlx5_core_qp *rq);
void mlx5_core_destroy_rq_tracked(struct mlx5_core_dev *dev,
projects / GitHub / MotorolaMobilityLLC / kernel-slsi.git / commitdiff