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e8899fad JG |
1 | /* |
2 | * Copyright (c) 2015 Linaro Ltd. | |
3 | * Copyright (c) 2015 Hisilicon Limited. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | */ | |
11 | ||
12 | #include "hisi_sas.h" | |
13 | #define DRV_NAME "hisi_sas" | |
14 | ||
15 | static struct scsi_transport_template *hisi_sas_stt; | |
16 | ||
7eb7869f JG |
17 | static struct scsi_host_template hisi_sas_sht = { |
18 | .module = THIS_MODULE, | |
19 | .name = DRV_NAME, | |
20 | .queuecommand = sas_queuecommand, | |
21 | .target_alloc = sas_target_alloc, | |
22 | .slave_configure = sas_slave_configure, | |
23 | .change_queue_depth = sas_change_queue_depth, | |
24 | .bios_param = sas_bios_param, | |
25 | .can_queue = 1, | |
26 | .this_id = -1, | |
27 | .sg_tablesize = SG_ALL, | |
28 | .max_sectors = SCSI_DEFAULT_MAX_SECTORS, | |
29 | .use_clustering = ENABLE_CLUSTERING, | |
30 | .eh_device_reset_handler = sas_eh_device_reset_handler, | |
31 | .eh_bus_reset_handler = sas_eh_bus_reset_handler, | |
32 | .target_destroy = sas_target_destroy, | |
33 | .ioctl = sas_ioctl, | |
34 | }; | |
35 | ||
e8899fad JG |
36 | static struct sas_domain_function_template hisi_sas_transport_ops = { |
37 | }; | |
38 | ||
7eb7869f JG |
39 | static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev, |
40 | const struct hisi_sas_hw *hw) | |
41 | { | |
42 | struct Scsi_Host *shost; | |
43 | struct hisi_hba *hisi_hba; | |
44 | struct device *dev = &pdev->dev; | |
45 | ||
46 | shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba)); | |
47 | if (!shost) | |
48 | goto err_out; | |
49 | hisi_hba = shost_priv(shost); | |
50 | ||
51 | hisi_hba->hw = hw; | |
52 | hisi_hba->pdev = pdev; | |
53 | hisi_hba->shost = shost; | |
54 | SHOST_TO_SAS_HA(shost) = &hisi_hba->sha; | |
55 | ||
56 | return shost; | |
57 | err_out: | |
58 | dev_err(dev, "shost alloc failed\n"); | |
59 | return NULL; | |
60 | } | |
61 | ||
62 | int hisi_sas_probe(struct platform_device *pdev, | |
63 | const struct hisi_sas_hw *hw) | |
64 | { | |
65 | struct Scsi_Host *shost; | |
66 | struct hisi_hba *hisi_hba; | |
67 | struct device *dev = &pdev->dev; | |
68 | struct asd_sas_phy **arr_phy; | |
69 | struct asd_sas_port **arr_port; | |
70 | struct sas_ha_struct *sha; | |
71 | int rc, phy_nr, port_nr, i; | |
72 | ||
73 | shost = hisi_sas_shost_alloc(pdev, hw); | |
74 | if (!shost) { | |
75 | rc = -ENOMEM; | |
76 | goto err_out_ha; | |
77 | } | |
78 | ||
79 | sha = SHOST_TO_SAS_HA(shost); | |
80 | hisi_hba = shost_priv(shost); | |
81 | platform_set_drvdata(pdev, sha); | |
82 | hisi_hba->n_phy = HISI_SAS_MAX_PHYS; | |
83 | phy_nr = port_nr = hisi_hba->n_phy; | |
84 | ||
85 | arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL); | |
86 | arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL); | |
87 | if (!arr_phy || !arr_port) | |
88 | return -ENOMEM; | |
89 | ||
90 | sha->sas_phy = arr_phy; | |
91 | sha->sas_port = arr_port; | |
92 | sha->core.shost = shost; | |
93 | sha->lldd_ha = hisi_hba; | |
94 | ||
95 | shost->transportt = hisi_sas_stt; | |
96 | shost->max_id = HISI_SAS_MAX_DEVICES; | |
97 | shost->max_lun = ~0; | |
98 | shost->max_channel = 1; | |
99 | shost->max_cmd_len = 16; | |
100 | shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT); | |
101 | shost->can_queue = HISI_SAS_COMMAND_ENTRIES; | |
102 | shost->cmd_per_lun = HISI_SAS_COMMAND_ENTRIES; | |
103 | ||
104 | sha->sas_ha_name = DRV_NAME; | |
105 | sha->dev = &hisi_hba->pdev->dev; | |
106 | sha->lldd_module = THIS_MODULE; | |
107 | sha->sas_addr = &hisi_hba->sas_addr[0]; | |
108 | sha->num_phys = hisi_hba->n_phy; | |
109 | sha->core.shost = hisi_hba->shost; | |
110 | ||
111 | for (i = 0; i < hisi_hba->n_phy; i++) { | |
112 | sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy; | |
113 | sha->sas_port[i] = &hisi_hba->port[i].sas_port; | |
114 | } | |
115 | ||
116 | rc = scsi_add_host(shost, &pdev->dev); | |
117 | if (rc) | |
118 | goto err_out_ha; | |
119 | ||
120 | rc = sas_register_ha(sha); | |
121 | if (rc) | |
122 | goto err_out_register_ha; | |
123 | ||
124 | scsi_scan_host(shost); | |
125 | ||
126 | return 0; | |
127 | ||
128 | err_out_register_ha: | |
129 | scsi_remove_host(shost); | |
130 | err_out_ha: | |
131 | kfree(shost); | |
132 | return rc; | |
133 | } | |
134 | EXPORT_SYMBOL_GPL(hisi_sas_probe); | |
135 | ||
e8899fad JG |
136 | static __init int hisi_sas_init(void) |
137 | { | |
138 | pr_info("hisi_sas: driver version %s\n", DRV_VERSION); | |
139 | ||
140 | hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops); | |
141 | if (!hisi_sas_stt) | |
142 | return -ENOMEM; | |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
147 | static __exit void hisi_sas_exit(void) | |
148 | { | |
149 | sas_release_transport(hisi_sas_stt); | |
150 | } | |
151 | ||
152 | module_init(hisi_sas_init); | |
153 | module_exit(hisi_sas_exit); | |
154 | ||
155 | MODULE_VERSION(DRV_VERSION); | |
156 | MODULE_LICENSE("GPL"); | |
157 | MODULE_AUTHOR("John Garry <john.garry@huawei.com>"); | |
158 | MODULE_DESCRIPTION("HISILICON SAS controller driver"); | |
159 | MODULE_ALIAS("platform:" DRV_NAME); |