1 // SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB
2 /* Copyright (c) 2017 - 2021 Intel Corporation */
3 #include "osdep.h"
4 #include "type.h"
5 #include "icrdma_hw.h"
6 
7 static u32 icrdma_regs[IRDMA_MAX_REGS] = {
8 	PFPE_CQPTAIL,
9 	PFPE_CQPDB,
10 	PFPE_CCQPSTATUS,
11 	PFPE_CCQPHIGH,
12 	PFPE_CCQPLOW,
13 	PFPE_CQARM,
14 	PFPE_CQACK,
15 	PFPE_AEQALLOC,
16 	PFPE_CQPERRCODES,
17 	PFPE_WQEALLOC,
18 	GLINT_DYN_CTL(0),
19 	ICRDMA_DB_ADDR_OFFSET,
20 
21 	GLPCI_LBARCTRL,
22 	GLPE_CPUSTATUS0,
23 	GLPE_CPUSTATUS1,
24 	GLPE_CPUSTATUS2,
25 	PFINT_AEQCTL,
26 	GLINT_CEQCTL(0),
27 	VSIQF_PE_CTL1(0),
28 	PFHMC_PDINV,
29 	GLHMC_VFPDINV(0),
30 	GLPE_CRITERR,
31 	GLINT_RATE(0),
32 };
33 
34 static u64 icrdma_masks[IRDMA_MAX_MASKS] = {
35 	ICRDMA_CCQPSTATUS_CCQP_DONE,
36 	ICRDMA_CCQPSTATUS_CCQP_ERR,
37 	ICRDMA_CQPSQ_STAG_PDID,
38 	ICRDMA_CQPSQ_CQ_CEQID,
39 	ICRDMA_CQPSQ_CQ_CQID,
40 	ICRDMA_COMMIT_FPM_CQCNT,
41 };
42 
43 static u64 icrdma_shifts[IRDMA_MAX_SHIFTS] = {
44 	ICRDMA_CCQPSTATUS_CCQP_DONE_S,
45 	ICRDMA_CCQPSTATUS_CCQP_ERR_S,
46 	ICRDMA_CQPSQ_STAG_PDID_S,
47 	ICRDMA_CQPSQ_CQ_CEQID_S,
48 	ICRDMA_CQPSQ_CQ_CQID_S,
49 	ICRDMA_COMMIT_FPM_CQCNT_S,
50 };
51 
52 /**
53  * icrdma_ena_irq - Enable interrupt
54  * @dev: pointer to the device structure
55  * @idx: vector index
56  */
57 static void icrdma_ena_irq(struct irdma_sc_dev *dev, u32 idx)
58 {
59 	u32 val;
60 	u32 interval = 0;
61 
62 	if (dev->ceq_itr && dev->aeq->msix_idx != idx)
63 		interval = dev->ceq_itr >> 1; /* 2 usec units */
64 	val = FIELD_PREP(IRDMA_GLINT_DYN_CTL_ITR_INDX, 0) |
65 	      FIELD_PREP(IRDMA_GLINT_DYN_CTL_INTERVAL, interval) |
66 	      FIELD_PREP(IRDMA_GLINT_DYN_CTL_INTENA, 1) |
67 	      FIELD_PREP(IRDMA_GLINT_DYN_CTL_CLEARPBA, 1);
68 
69 	if (dev->hw_attrs.uk_attrs.hw_rev != IRDMA_GEN_1)
70 		writel(val, dev->hw_regs[IRDMA_GLINT_DYN_CTL] + idx);
71 	else
72 		writel(val, dev->hw_regs[IRDMA_GLINT_DYN_CTL] + (idx - 1));
73 }
74 
75 /**
76  * icrdma_disable_irq - Disable interrupt
77  * @dev: pointer to the device structure
78  * @idx: vector index
79  */
80 static void icrdma_disable_irq(struct irdma_sc_dev *dev, u32 idx)
81 {
82 	if (dev->hw_attrs.uk_attrs.hw_rev != IRDMA_GEN_1)
83 		writel(0, dev->hw_regs[IRDMA_GLINT_DYN_CTL] + idx);
84 	else
85 		writel(0, dev->hw_regs[IRDMA_GLINT_DYN_CTL] + (idx - 1));
86 }
87 
88 /**
89  * icrdma_cfg_ceq- Configure CEQ interrupt
90  * @dev: pointer to the device structure
91  * @ceq_id: Completion Event Queue ID
92  * @idx: vector index
93  * @enable: True to enable, False disables
94  */
95 static void icrdma_cfg_ceq(struct irdma_sc_dev *dev, u32 ceq_id, u32 idx,
96 			   bool enable)
97 {
98 	u32 reg_val;
99 
100 	reg_val = FIELD_PREP(IRDMA_GLINT_CEQCTL_CAUSE_ENA, enable) |
101 		  FIELD_PREP(IRDMA_GLINT_CEQCTL_MSIX_INDX, idx) |
102 		  FIELD_PREP(IRDMA_GLINT_CEQCTL_ITR_INDX, 3);
103 
104 	writel(reg_val, dev->hw_regs[IRDMA_GLINT_CEQCTL] + ceq_id);
105 }
106 
107 static const struct irdma_irq_ops icrdma_irq_ops = {
108 	.irdma_cfg_aeq = irdma_cfg_aeq,
109 	.irdma_cfg_ceq = icrdma_cfg_ceq,
110 	.irdma_dis_irq = icrdma_disable_irq,
111 	.irdma_en_irq = icrdma_ena_irq,
112 };
113 
114 void icrdma_init_hw(struct irdma_sc_dev *dev)
115 {
116 	int i;
117 	u8 __iomem *hw_addr;
118 
119 	for (i = 0; i < IRDMA_MAX_REGS; ++i) {
120 		hw_addr = dev->hw->hw_addr;
121 
122 		if (i == IRDMA_DB_ADDR_OFFSET)
123 			hw_addr = NULL;
124 
125 		dev->hw_regs[i] = (u32 __iomem *)(hw_addr + icrdma_regs[i]);
126 	}
127 	dev->hw_attrs.max_hw_vf_fpm_id = IRDMA_MAX_VF_FPM_ID;
128 	dev->hw_attrs.first_hw_vf_fpm_id = IRDMA_FIRST_VF_FPM_ID;
129 
130 	for (i = 0; i < IRDMA_MAX_SHIFTS; ++i)
131 		dev->hw_shifts[i] = icrdma_shifts[i];
132 
133 	for (i = 0; i < IRDMA_MAX_MASKS; ++i)
134 		dev->hw_masks[i] = icrdma_masks[i];
135 
136 	dev->wqe_alloc_db = dev->hw_regs[IRDMA_WQEALLOC];
137 	dev->cq_arm_db = dev->hw_regs[IRDMA_CQARM];
138 	dev->aeq_alloc_db = dev->hw_regs[IRDMA_AEQALLOC];
139 	dev->cqp_db = dev->hw_regs[IRDMA_CQPDB];
140 	dev->cq_ack_db = dev->hw_regs[IRDMA_CQACK];
141 	dev->irq_ops = &icrdma_irq_ops;
142 	dev->hw_attrs.max_hw_ird = ICRDMA_MAX_IRD_SIZE;
143 	dev->hw_attrs.max_hw_ord = ICRDMA_MAX_ORD_SIZE;
144 	dev->hw_attrs.max_stat_inst = ICRDMA_MAX_STATS_COUNT;
145 
146 	dev->hw_attrs.uk_attrs.max_hw_sq_chunk = IRDMA_MAX_QUANTA_PER_WR;
147 	dev->hw_attrs.uk_attrs.feature_flags |= IRDMA_FEATURE_RTS_AE |
148 						IRDMA_FEATURE_CQ_RESIZE;
149 }
150