[Patch v7 11/12] net: mana: Define data structures for protection domain and memory registration

longli
2022-10-17T19:21:55Z

From: Ajay Sharma <sharmaajay@microsoft.com>

The MANA hardware support protection domain and memory registration for use
in RDMA environment. Add those definitions and expose them for use by the
RDMA driver.

Signed-off-by: Ajay Sharma <sharmaajay@microsoft.com>
Signed-off-by: Long Li <longli@microsoft.com>
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Acked-by: Haiyang Zhang <haiyangz@microsoft.com>
---
Change log:
v3: format/coding style changes
v5: remove unused code dealing with kernel-mode MR

.../net/ethernet/microsoft/mana/gdma_main.c | 27 ++--
drivers/net/ethernet/microsoft/mana/mana_en.c | 18 +--
include/net/mana/gdma.h | 120 +++++++++++++++++-
3 files changed, 142 insertions(+), 23 deletions(-)

diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c
index 93847ed0e4b3..fae7a93c77f0 100644
--- a/drivers/net/ethernet/microsoft/mana/gdma_main.c
+++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c
@@ -198,7 +198,7 @@ static int mana_gd_create_hw_eq(struct gdma_context *gc,
req.type = queue->type;
req.pdid = queue->gdma_dev->pdid;
req.doolbell_id = queue->gdma_dev->doorbell;
- req.gdma_region = queue->mem_info.gdma_region;
+ req.gdma_region = queue->mem_info.dma_region_handle;
req.queue_size = queue->queue_size;
req.log2_throttle_limit = queue->eq.log2_throttle_limit;
req.eq_pci_msix_index = queue->eq.msix_index;
@@ -212,7 +212,7 @@ static int mana_gd_create_hw_eq(struct gdma_context *gc,

queue->id = resp.queue_index;
queue->eq.disable_needed = true;
- queue->mem_info.gdma_region = GDMA_INVALID_DMA_REGION;
+ queue->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION;
return 0;
}

@@ -666,24 +666,30 @@ int mana_gd_create_hwc_queue(struct gdma_dev *gd,
return err;
}

-static void mana_gd_destroy_dma_region(struct gdma_context *gc, u64 gdma_region)
+int mana_gd_destroy_dma_region(struct gdma_context *gc,
+ gdma_obj_handle_t dma_region_handle)
{
struct gdma_destroy_dma_region_req req = {};
struct gdma_general_resp resp = {};
int err;

- if (gdma_region == GDMA_INVALID_DMA_REGION)
- return;
+ if (dma_region_handle == GDMA_INVALID_DMA_REGION)
+ return 0;

mana_gd_init_req_hdr(&req.hdr, GDMA_DESTROY_DMA_REGION, sizeof(req),
sizeof(resp));
- req.gdma_region = gdma_region;
+ req.dma_region_handle = dma_region_handle;

err = mana_gd_send_request(gc, sizeof(req), &req, sizeof(resp), &resp);
- if (err || resp.hdr.status)
+ if (err || resp.hdr.status) {
dev_err(gc->dev, "Failed to destroy DMA region: %d, 0x%x\n",
err, resp.hdr.status);
+ return -EPROTO;
+ }
+
+ return 0;
}
+EXPORT_SYMBOL_NS(mana_gd_destroy_dma_region, NET_MANA);

static int mana_gd_create_dma_region(struct gdma_dev *gd,
struct gdma_mem_info *gmi)
@@ -728,14 +734,15 @@ static int mana_gd_create_dma_region(struct gdma_dev *gd,
if (err)
goto out;

- if (resp.hdr.status || resp.gdma_region == GDMA_INVALID_DMA_REGION) {
+ if (resp.hdr.status ||
+ resp.dma_region_handle == GDMA_INVALID_DMA_REGION) {
dev_err(gc->dev, "Failed to create DMA region: 0x%x\n",
resp.hdr.status);
err = -EPROTO;
goto out;
}

- gmi->gdma_region = resp.gdma_region;
+ gmi->dma_region_handle = resp.dma_region_handle;
out:
kfree(req);
return err;
@@ -858,7 +865,7 @@ void mana_gd_destroy_queue(struct gdma_context *gc, struct gdma_queue *queue)
return;
}

- mana_gd_destroy_dma_region(gc, gmi->gdma_region);
+ mana_gd_destroy_dma_region(gc, gmi->dma_region_handle);
mana_gd_free_memory(gmi);
kfree(queue);
}
diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c
index f6bcd0cc6cda..1c59502d34b5 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_en.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
@@ -1523,10 +1523,10 @@ static int mana_create_txq(struct mana_port_context *apc,
memset(&wq_spec, 0, sizeof(wq_spec));
memset(&cq_spec, 0, sizeof(cq_spec));

- wq_spec.gdma_region = txq->gdma_sq->mem_info.gdma_region;
+ wq_spec.gdma_region = txq->gdma_sq->mem_info.dma_region_handle;
wq_spec.queue_size = txq->gdma_sq->queue_size;

- cq_spec.gdma_region = cq->gdma_cq->mem_info.gdma_region;
+ cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle;
cq_spec.queue_size = cq->gdma_cq->queue_size;
cq_spec.modr_ctx_id = 0;
cq_spec.attached_eq = cq->gdma_cq->cq.parent->id;
@@ -1541,8 +1541,10 @@ static int mana_create_txq(struct mana_port_context *apc,
txq->gdma_sq->id = wq_spec.queue_index;
cq->gdma_cq->id = cq_spec.queue_index;

- txq->gdma_sq->mem_info.gdma_region = GDMA_INVALID_DMA_REGION;
- cq->gdma_cq->mem_info.gdma_region = GDMA_INVALID_DMA_REGION;
+ txq->gdma_sq->mem_info.dma_region_handle =
+ GDMA_INVALID_DMA_REGION;
+ cq->gdma_cq->mem_info.dma_region_handle =
+ GDMA_INVALID_DMA_REGION;

txq->gdma_txq_id = txq->gdma_sq->id;

@@ -1753,10 +1755,10 @@ static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc,

memset(&wq_spec, 0, sizeof(wq_spec));
memset(&cq_spec, 0, sizeof(cq_spec));
- wq_spec.gdma_region = rxq->gdma_rq->mem_info.gdma_region;
+ wq_spec.gdma_region = rxq->gdma_rq->mem_info.dma_region_handle;
wq_spec.queue_size = rxq->gdma_rq->queue_size;

- cq_spec.gdma_region = cq->gdma_cq->mem_info.gdma_region;
+ cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle;
cq_spec.queue_size = cq->gdma_cq->queue_size;
cq_spec.modr_ctx_id = 0;
cq_spec.attached_eq = cq->gdma_cq->cq.parent->id;
@@ -1769,8 +1771,8 @@ static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc,
rxq->gdma_rq->id = wq_spec.queue_index;
cq->gdma_cq->id = cq_spec.queue_index;

- rxq->gdma_rq->mem_info.gdma_region = GDMA_INVALID_DMA_REGION;
- cq->gdma_cq->mem_info.gdma_region = GDMA_INVALID_DMA_REGION;
+ rxq->gdma_rq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION;
+ cq->gdma_cq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION;

rxq->gdma_id = rxq->gdma_rq->id;
cq->gdma_id = cq->gdma_cq->id;
diff --git a/include/net/mana/gdma.h b/include/net/mana/gdma.h
index bc060b6fa54c..221adc96340c 100644
--- a/include/net/mana/gdma.h
+++ b/include/net/mana/gdma.h
@@ -29,6 +29,10 @@ enum gdma_request_type {
GDMA_CREATE_DMA_REGION = 25,
GDMA_DMA_REGION_ADD_PAGES = 26,
GDMA_DESTROY_DMA_REGION = 27,
+ GDMA_CREATE_PD = 29,
+ GDMA_DESTROY_PD = 30,
+ GDMA_CREATE_MR = 31,
+ GDMA_DESTROY_MR = 32,
};

#define GDMA_RESOURCE_DOORBELL_PAGE 27
@@ -61,6 +65,8 @@ enum {
GDMA_DEVICE_MANA = 2,
};

+typedef u64 gdma_obj_handle_t;
+
struct gdma_resource {
/* Protect the bitmap */
spinlock_t lock;
@@ -194,7 +200,7 @@ struct gdma_mem_info {
u64 length;

/* Allocated by the PF driver */
- u64 gdma_region;
+ gdma_obj_handle_t dma_region_handle;
};

#define REGISTER_ATB_MST_MKEY_LOWER_SIZE 8
@@ -618,7 +624,7 @@ struct gdma_create_queue_req {
u32 reserved1;
u32 pdid;
u32 doolbell_id;
- u64 gdma_region;
+ gdma_obj_handle_t gdma_region;
u32 reserved2;
u32 queue_size;
u32 log2_throttle_limit;
@@ -645,6 +651,28 @@ struct gdma_disable_queue_req {
u32 alloc_res_id_on_creation;
}; /* HW DATA */

+enum atb_page_size {
+ ATB_PAGE_SIZE_4K,
+ ATB_PAGE_SIZE_8K,
+ ATB_PAGE_SIZE_16K,
+ ATB_PAGE_SIZE_32K,
+ ATB_PAGE_SIZE_64K,
+ ATB_PAGE_SIZE_128K,
+ ATB_PAGE_SIZE_256K,
+ ATB_PAGE_SIZE_512K,
+ ATB_PAGE_SIZE_1M,
+ ATB_PAGE_SIZE_2M,
+ ATB_PAGE_SIZE_MAX,
+};
+
+enum gdma_mr_access_flags {
+ GDMA_ACCESS_FLAG_LOCAL_READ = BIT_ULL(0),
+ GDMA_ACCESS_FLAG_LOCAL_WRITE = BIT_ULL(1),
+ GDMA_ACCESS_FLAG_REMOTE_READ = BIT_ULL(2),
+ GDMA_ACCESS_FLAG_REMOTE_WRITE = BIT_ULL(3),
+ GDMA_ACCESS_FLAG_REMOTE_ATOMIC = BIT_ULL(4),
+};
+
/* GDMA_CREATE_DMA_REGION */
struct gdma_create_dma_region_req {
struct gdma_req_hdr hdr;
@@ -671,14 +699,14 @@ struct gdma_create_dma_region_req {

struct gdma_create_dma_region_resp {
struct gdma_resp_hdr hdr;
- u64 gdma_region;
+ gdma_obj_handle_t dma_region_handle;
}; /* HW DATA */

/* GDMA_DMA_REGION_ADD_PAGES */
struct gdma_dma_region_add_pages_req {
struct gdma_req_hdr hdr;

- u64 gdma_region;
+ gdma_obj_handle_t dma_region_handle;

u32 page_addr_list_len;
u32 reserved3;
@@ -690,9 +718,88 @@ struct gdma_dma_region_add_pages_req {
struct gdma_destroy_dma_region_req {
struct gdma_req_hdr hdr;

- u64 gdma_region;
+ gdma_obj_handle_t dma_region_handle;
}; /* HW DATA */

+enum gdma_pd_flags {
+ GDMA_PD_FLAG_INVALID = 0,
+};
+
+struct gdma_create_pd_req {
+ struct gdma_req_hdr hdr;
+ enum gdma_pd_flags flags;
+ u32 reserved;
+};/* HW DATA */
+
+struct gdma_create_pd_resp {
+ struct gdma_resp_hdr hdr;
+ gdma_obj_handle_t pd_handle;
+ u32 pd_id;
+ u32 reserved;
+};/* HW DATA */
+
+struct gdma_destroy_pd_req {
+ struct gdma_req_hdr hdr;
+ gdma_obj_handle_t pd_handle;
+};/* HW DATA */
+
+struct gdma_destory_pd_resp {
+ struct gdma_resp_hdr hdr;
+};/* HW DATA */
+
+enum gdma_mr_type {
+ /* Guest Virtual Address - MRs of this type allow access
+ * to memory mapped by PTEs associated with this MR using a virtual
+ * address that is set up in the MST
+ */
+ GDMA_MR_TYPE_GVA = 2,
+};
+
+struct gdma_create_mr_params {
+ gdma_obj_handle_t pd_handle;
+ enum gdma_mr_type mr_type;
+ union {
+ struct {
+ gdma_obj_handle_t dma_region_handle;
+ u64 virtual_address;
+ enum gdma_mr_access_flags access_flags;
+ } gva;
+ };
+};
+
+struct gdma_create_mr_request {
+ struct gdma_req_hdr hdr;
+ gdma_obj_handle_t pd_handle;
+ enum gdma_mr_type mr_type;
+ u32 reserved_1;
+
+ union {
+ struct {
+ gdma_obj_handle_t dma_region_handle;
+ u64 virtual_address;
+ enum gdma_mr_access_flags access_flags;
+ } gva;
+
+ };
+ u32 reserved_2;
+};/* HW DATA */
+
+struct gdma_create_mr_response {
+ struct gdma_resp_hdr hdr;
+ gdma_obj_handle_t mr_handle;
+ u32 lkey;
+ u32 rkey;
+};/* HW DATA */
+
+struct gdma_destroy_mr_request {
+ struct gdma_req_hdr hdr;
+ gdma_obj_handle_t mr_handle;
+};/* HW DATA */
+
+struct gdma_destroy_mr_response {
+ struct gdma_resp_hdr hdr;
+};/* HW DATA */
+
int mana_gd_verify_vf_version(struct pci_dev *pdev);

int mana_gd_register_device(struct gdma_dev *gd);
@@ -720,4 +827,7 @@ void mana_gd_free_memory(struct gdma_mem_info *gmi);
int mana_gd_send_request(struct gdma_context *gc, u32 req_len, const void *req,
u32 resp_len, void *resp);

+int mana_gd_destroy_dma_region(struct gdma_context *gc,
+ gdma_obj_handle_t dma_region_handle);
+
#endif /* _GDMA_H */
--
2.17.1