[PATCH v7 04/16] lpfc: vmid: Add the datastructure for supporting VMID in lpfc

Muneendra
2021-01-07T04:54:41Z

This patch adds the primary datastructures needed to implement VMID in lpfc
driver. It maintains the capability, current state, hash table for the
vmid/appid along with other information.

Signed-off-by: Gaurav Srivastava <gaurav.srivastava@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>

---
v7:
No change

v6:
No change

v5:
No Change

v4:
No change

v3:
No change

v2:
Ported the patch on top of 5.10/scsi-queue
Removed unused variable.
---
drivers/scsi/lpfc/lpfc.h | 97 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 97 insertions(+)

diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
index a54c8da30273..ab61352363d4 100644
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -303,6 +303,63 @@ struct lpfc_stats {
struct lpfc_hba;

+#define LPFC_VMID_TIMER 300 /* timer interval in seconds. */
+
+#define LPFC_MAX_VMID_SIZE 256
+#define LPFC_COMPRESS_VMID_SIZE 16
+
+union lpfc_vmid_io_tag {
+ u32 app_id; /* App Id vmid */
+ u8 cs_ctl_vmid; /* Priority tag vmid */
+};
+
+#define JIFFIES_PER_HR (HZ * 60 * 60)
+
+struct lpfc_vmid {
+ u8 flag;
+#define LPFC_VMID_SLOT_FREE 0x0
+#define LPFC_VMID_SLOT_USED 0x1
+#define LPFC_VMID_REQ_REGISTER 0x2
+#define LPFC_VMID_REGISTERED 0x4
+#define LPFC_VMID_DE_REGISTER 0x8
+ u8 host_vmid[LPFC_MAX_VMID_SIZE];
+ union lpfc_vmid_io_tag un;
+ u64 io_rd_cnt;
+ u64 io_wr_cnt;
+ u8 vmid_len;
+ u8 delete_inactive; /* Delete if inactive flag 0 = no, 1 = yes */
+ u32 hash_index;
+ u64 __percpu *last_io_time;
+};
+
+#define lpfc_vmid_is_type_priority_tag(vport)\
+ (vport->vmid_priority_tagging ? 1 : 0)
+
+#define LPFC_VMID_HASH_SIZE 256
+#define LPFC_VMID_HASH_MASK 255
+#define LPFC_VMID_HASH_SHIFT 6
+
+struct lpfc_vmid_context {
+ struct lpfc_vmid *vmp;
+ struct lpfc_nodelist *nlp;
+ u8 instantiated;
+};
+
+struct lpfc_vmid_priority_range {
+ u8 low;
+ u8 high;
+ u8 qos;
+};
+
+struct lpfc_vmid_priority_info {
+ u32 num_descriptors;
+ struct lpfc_vmid_priority_range *vmid_range;
+};
+
+#define QFPA_EVEN_ONLY 0x01
+#define QFPA_ODD_ONLY 0x02
+#define QFPA_EVEN_ODD 0x03
+
enum discovery_state {
LPFC_VPORT_UNKNOWN = 0, /* vport state is unknown */
LPFC_VPORT_FAILED = 1, /* vport has failed */
@@ -442,6 +499,9 @@ struct lpfc_vport {
#define WORKER_RAMP_DOWN_QUEUE 0x800 /* hba: Decrease Q depth */
#define WORKER_RAMP_UP_QUEUE 0x1000 /* hba: Increase Q depth */
#define WORKER_SERVICE_TXQ 0x2000 /* hba: IOCBs on the txq */
+#define WORKER_CHECK_INACTIVE_VMID 0x4000 /* hba: check inactive vmids */
+#define WORKER_CHECK_VMID_ISSUE_QFPA 0x8000 /* vport: Check if qfpa need */
+ /* to issue */

struct timer_list els_tmofunc;
struct timer_list delayed_disc_tmo;
@@ -452,6 +512,8 @@ struct lpfc_vport {
#define FC_LOADING 0x1 /* HBA in process of loading drvr */
#define FC_UNLOADING 0x2 /* HBA in process of unloading drvr */
#define FC_ALLOW_FDMI 0x4 /* port is ready for FDMI requests */
+#define FC_ALLOW_VMID 0x8 /* Allow VMID IO's */
+#define FC_DEREGISTER_ALL_APP_ID 0x10 /* Deregister all vmid's */
/* Vport Config Parameters */
uint32_t cfg_scan_down;
uint32_t cfg_lun_queue_depth;
@@ -470,9 +532,36 @@ struct lpfc_vport {
uint32_t cfg_tgt_queue_depth;
uint32_t cfg_first_burst_size;
uint32_t dev_loss_tmo_changed;
+ /* VMID parameters */
+ u8 lpfc_vmid_host_uuid[LPFC_COMPRESS_VMID_SIZE];
+ u32 max_vmid; /* maximum VMIDs allowed per port */
+ u32 cur_vmid_cnt; /* Current VMID count */
+#define LPFC_MIN_VMID 4
+#define LPFC_MAX_VMID 255
+ u32 vmid_inactivity_timeout; /* Time after which the VMID */
+ /* deregisters from switch */
+ u32 vmid_priority_tagging;
+#define LPFC_VMID_PRIO_TAG_DISABLE 0 /* Disable */
+#define LPFC_VMID_PRIO_TAG_SUP_TARGETS 1 /* Allow supported targets only */
+#define LPFC_VMID_PRIO_TAG_ALL_TARGETS 2 /* Allow all targets */
+ unsigned long *vmid_priority_range;
+#define LPFC_VMID_MAX_PRIORITY_RANGE 256
+#define LPFC_VMID_PRIORITY_BITMAP_SIZE 32
+ u8 vmid_flag;
+#define LPFC_VMID_IN_USE 0x1
+#define LPFC_VMID_ISSUE_QFPA 0x2
+#define LPFC_VMID_QFPA_CMPL 0x4
+#define LPFC_VMID_QOS_ENABLED 0x8
+#define LPFC_VMID_TIMER_ENBLD 0x10
+ struct fc_qfpa_res *qfpa_res;

struct fc_vport *fc_vport;

+ struct lpfc_vmid *vmid;
+ struct lpfc_vmid *hash_table[LPFC_VMID_HASH_SIZE];
+ rwlock_t vmid_lock;
+ struct lpfc_vmid_priority_info vmid_priority;
+
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
struct dentry *debug_disc_trc;
struct dentry *debug_nodelist;
@@ -934,6 +1023,13 @@ struct lpfc_hba {
struct nvmet_fc_target_port *targetport;
lpfc_vpd_t vpd; /* vital product data */

+ u32 cfg_max_vmid; /* maximum VMIDs allowed per port */
+ u32 cfg_vmid_app_header;
+#define LPFC_VMID_APP_HEADER_DISABLE 0
+#define LPFC_VMID_APP_HEADER_ENABLE 1
+ u32 cfg_vmid_priority_tagging;
+ u32 cfg_vmid_inactivity_timeout; /* Time after which the VMID */
+ /* deregisters from switch */
struct pci_dev *pcidev;
struct list_head work_list;
uint32_t work_ha; /* Host Attention Bits for WT */
@@ -1175,6 +1271,7 @@ struct lpfc_hba {
struct list_head ct_ev_waiters;
struct unsol_rcv_ct_ctx ct_ctx[LPFC_CT_CTX_MAX];
uint32_t ctx_idx;
+ struct timer_list inactive_vmid_poll;

/* RAS Support */
struct lpfc_ras_fwlog ras_fwlog;