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1 /*-
2  * BSD LICENSE
3  *
4  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  *
11  *   * Redistributions of source code must retain the above copyright
12  *     notice, this list of conditions and the following disclaimer.
13  *   * Redistributions in binary form must reproduce the above copyright
14  *     notice, this list of conditions and the following disclaimer in
15  *     the documentation and/or other materials provided with the
16  *     distribution.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  *
30  * $FreeBSD$
31  */
32
33 #ifndef _ISCI_H
34 #define _ISCI_H
35
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/bus.h>
40 #include <sys/lock.h>
41 #include <sys/mutex.h>
42 #include <sys/types.h>
43 #include <sys/malloc.h>
44 #include <sys/rman.h>
45
46 #include <machine/bus.h>
47 #include <machine/resource.h>
48
49 #include <cam/cam.h>
50 #include <cam/cam_ccb.h>
51 #include <cam/cam_sim.h>
52 #include <cam/cam_xpt_sim.h>
53
54 #include <dev/isci/environment.h>
55 #include <dev/isci/scil/intel_pci.h>
56
57 #include <dev/isci/scil/sci_types.h>
58 #include <dev/isci/scil/sci_object.h>
59 #include <dev/isci/scil/sci_status.h>
60 #include <dev/isci/scil/sci_pool.h>
61 #include <dev/isci/scil/sci_fast_list.h>
62
63 #include <dev/isci/scil/sci_controller_constants.h>
64
65 #include <dev/isci/scil/scic_controller.h>
66 #include <dev/isci/scil/scic_config_parameters.h>
67
68 #define DEVICE2SOFTC(dev) ((struct isci_softc *) device_get_softc(dev))
69
70 #define DEVICE_TIMEOUT 1000
71 #define SCI_MAX_TIMERS  32
72
73 #define ISCI_NUM_PCI_BARS  2
74 #define ISCI_MAX_LUN             8
75
76 MALLOC_DECLARE(M_ISCI);
77
78 struct ISCI_TIMER {
79         struct callout          callout;
80         SCI_TIMER_CALLBACK_T    callback;
81         void                    *cookie;
82         BOOL                    is_started;
83 };
84
85 struct ISCI_REMOTE_DEVICE {
86         uint32_t                        index;
87         struct ISCI_DOMAIN              *domain;
88         SCI_REMOTE_DEVICE_HANDLE_T      sci_object;
89         BOOL                            is_resetting;
90         uint32_t                        frozen_lun_mask;
91         SCI_FAST_LIST_ELEMENT_T         pending_device_reset_element;
92
93         /*
94          * This queue maintains CCBs that have been returned with
95          *  SCI_IO_FAILURE_INVALID_STATE from the SCI layer.  These CCBs
96          *  need to be retried, but we cannot return CAM_REQUEUE_REQ because
97          *  this status gets passed all the way back up to users of the pass(4)
98          *  interface and breaks things like smartctl.  So instead, we queue
99          *  these CCBs internally.
100          */
101         TAILQ_HEAD(,ccb_hdr)            queued_ccbs;
102
103         /*
104          * Marker denoting this remote device needs its first queued ccb to
105          *  be retried.
106          */
107         BOOL                            release_queued_ccb;
108
109         /*
110          * Points to a CCB in the queue that is currently being processed by
111          *  SCIL.  This allows us to keep in flight CCBs in the queue so as to
112          *  maintain ordering (i.e. in case we retry an I/O and then find out
113          *  it needs to be retried again - it just keeps its same place in the
114          *  queue.
115          */
116         union ccb *                     queued_ccb_in_progress;
117 };
118
119 struct ISCI_DOMAIN {
120         struct ISCI_CONTROLLER          *controller;
121         SCI_DOMAIN_HANDLE_T             sci_object;
122         uint8_t                         index;
123         struct ISCI_REMOTE_DEVICE       *da_remote_device;
124 };
125
126 struct ISCI_MEMORY
127 {
128         bus_addr_t      physical_address;
129         bus_dma_tag_t   dma_tag;
130         bus_dmamap_t    dma_map;
131         POINTER_UINT    virtual_address;
132         uint32_t        size;
133         int             error;
134 };
135
136 struct ISCI_INTERRUPT_INFO
137 {
138         SCIC_CONTROLLER_HANDLER_METHODS_T       *handlers;
139         void                                    *interrupt_target_handle;
140         struct resource                         *res;
141         int                                     rid;
142         void                                    *tag;
143
144 };
145
146 struct ISCI_CONTROLLER
147 {
148         struct isci_softc       *isci;
149         uint8_t                 index;
150         SCI_CONTROLLER_HANDLE_T scif_controller_handle;
151         struct ISCI_DOMAIN      domain[SCI_MAX_DOMAINS];
152         BOOL                    is_started;
153         BOOL                    has_been_scanned;
154         uint32_t                initial_discovery_mask;
155         BOOL                    is_frozen;
156         BOOL                    release_queued_ccbs;
157         uint8_t                 *remote_device_memory;
158         struct ISCI_MEMORY      cached_controller_memory;
159         struct ISCI_MEMORY      uncached_controller_memory;
160         struct ISCI_MEMORY      request_memory;
161         bus_dma_tag_t           buffer_dma_tag;
162         struct mtx              lock;
163         struct cam_sim          *sim;
164         struct cam_path         *path;
165         struct ISCI_REMOTE_DEVICE *remote_device[SCI_MAX_REMOTE_DEVICES];
166         void                    *timer_memory;
167         SCIC_OEM_PARAMETERS_T   oem_parameters;
168         uint32_t                oem_parameters_version;
169         uint32_t                queue_depth;
170         uint32_t                sim_queue_depth;
171         SCI_FAST_LIST_T         pending_device_reset_list;
172
173         SCI_MEMORY_DESCRIPTOR_LIST_HANDLE_T mdl;
174
175         SCI_POOL_CREATE(remote_device_pool, struct ISCI_REMOTE_DEVICE *, SCI_MAX_REMOTE_DEVICES);
176         SCI_POOL_CREATE(request_pool, struct ISCI_REQUEST *, SCI_MAX_IO_REQUESTS);
177         SCI_POOL_CREATE(timer_pool, struct ISCI_TIMER *, SCI_MAX_TIMERS);
178         SCI_POOL_CREATE(unmap_buffer_pool, void *, SCI_MAX_REMOTE_DEVICES);
179 };
180
181 struct ISCI_REQUEST
182 {
183         SCI_CONTROLLER_HANDLE_T         controller_handle;
184         SCI_REMOTE_DEVICE_HANDLE_T      remote_device_handle;
185         bus_dma_tag_t                   dma_tag;
186         bus_dmamap_t                    dma_map;
187         SCI_PHYSICAL_ADDRESS            physical_address;
188         struct callout                  timer;
189 };
190
191 struct ISCI_IO_REQUEST
192 {
193         struct ISCI_REQUEST     parent;
194         SCI_IO_REQUEST_HANDLE_T sci_object;
195         union ccb               *ccb;
196         uint32_t                num_segments;
197         uint32_t                current_sge_index;
198         bus_dma_segment_t       *sge;
199 };
200
201 struct ISCI_TASK_REQUEST
202 {
203         struct ISCI_REQUEST             parent;
204         struct scsi_sense_data          sense_data;
205         SCI_TASK_REQUEST_HANDLE_T       sci_object;
206         union ccb                       *ccb;
207
208 };
209
210 struct ISCI_PCI_BAR {
211
212         bus_space_tag_t         bus_tag;
213         bus_space_handle_t      bus_handle;
214         int                     resource_id;
215         struct resource         *resource;
216
217 };
218
219 /*
220  * One of these per allocated PCI device.
221  */
222 struct isci_softc {
223
224         struct ISCI_PCI_BAR                     pci_bar[ISCI_NUM_PCI_BARS];
225         struct ISCI_CONTROLLER                  controllers[SCI_MAX_CONTROLLERS];
226         SCI_LIBRARY_HANDLE_T                    sci_library_handle;
227         void *                                  sci_library_memory;
228         SCIC_CONTROLLER_HANDLER_METHODS_T       handlers[4];
229         struct ISCI_INTERRUPT_INFO              interrupt_info[4];
230         uint32_t                                controller_count;
231         uint32_t                                num_interrupts;
232         uint32_t                                coalesce_number;
233         uint32_t                                coalesce_timeout;
234         device_t                                device;
235         SCI_PCI_COMMON_HEADER_T                 pci_common_header;
236         BOOL                                    oem_parameters_found;
237         struct intr_config_hook                 config_hook;
238 };
239
240 int isci_allocate_resources(device_t device);
241
242 int isci_allocate_dma_buffer(device_t device, struct ISCI_MEMORY *memory);
243
244 void isci_remote_device_reset(struct ISCI_REMOTE_DEVICE *remote_device,
245     union ccb *ccb);
246
247 /**
248  *  Returns the negotiated link rate (in KB/s) for the associated
249  *      remote device.  Used to fill out bitrate field for GET_TRANS_SETTINGS.
250  *      Will match the negotiated link rate for the lowest numbered local phy
251  *      in the port/domain containing this remote device.
252  */
253 uint32_t isci_remote_device_get_bitrate(
254     struct ISCI_REMOTE_DEVICE *remote_device);
255
256 void isci_remote_device_freeze_lun_queue(
257     struct ISCI_REMOTE_DEVICE *remote_device, lun_id_t lun);
258
259 void isci_remote_device_release_lun_queue(
260     struct ISCI_REMOTE_DEVICE *remote_device, lun_id_t lun);
261
262 void isci_remote_device_release_device_queue(
263     struct ISCI_REMOTE_DEVICE * remote_device);
264
265 void isci_request_construct(struct ISCI_REQUEST *request,
266     SCI_CONTROLLER_HANDLE_T scif_controller_handle,
267     bus_dma_tag_t io_buffer_dma_tag, bus_addr_t physical_address);
268
269 #define isci_io_request_get_max_io_size() \
270         ((SCI_MAX_SCATTER_GATHER_ELEMENTS - 1) * PAGE_SIZE)
271
272 #define isci_task_request_get_object_size() \
273         (sizeof(struct ISCI_TASK_REQUEST) + scif_task_request_get_object_size())
274
275 #define isci_io_request_get_object_size() \
276         (sizeof(struct ISCI_IO_REQUEST) + scif_io_request_get_object_size())
277
278 #define isci_request_get_object_size() \
279         max( \
280             isci_task_request_get_object_size(), \
281             isci_io_request_get_object_size() \
282         )
283
284
285 void isci_io_request_execute_scsi_io(union ccb *ccb,
286     struct ISCI_CONTROLLER *controller);
287
288 #if __FreeBSD_version >= 900026
289 void isci_io_request_execute_smp_io(
290     union ccb *ccb, struct ISCI_CONTROLLER *controller);
291 #endif
292
293 void isci_io_request_timeout(void *);
294
295 void isci_get_oem_parameters(struct isci_softc *isci);
296
297 void isci_io_request_complete(
298     SCI_CONTROLLER_HANDLE_T scif_controller,
299     SCI_REMOTE_DEVICE_HANDLE_T remote_device,
300     struct ISCI_IO_REQUEST * isci_request, SCI_IO_STATUS completion_status);
301
302 void isci_task_request_complete(
303     SCI_CONTROLLER_HANDLE_T scif_controller,
304     SCI_REMOTE_DEVICE_HANDLE_T remote_device,
305     SCI_TASK_REQUEST_HANDLE_T io_request, SCI_TASK_STATUS completion_status);
306
307 void isci_sysctl_initialize(struct isci_softc *isci);
308
309 void isci_controller_construct(struct ISCI_CONTROLLER *controller,
310     struct isci_softc *isci);
311
312 SCI_STATUS isci_controller_initialize(struct ISCI_CONTROLLER *controller);
313
314 int isci_controller_allocate_memory(struct ISCI_CONTROLLER *controller);
315
316 void isci_controller_domain_discovery_complete(
317     struct ISCI_CONTROLLER *isci_controller, struct ISCI_DOMAIN *isci_domain);
318
319 int isci_controller_attach_to_cam(struct ISCI_CONTROLLER *controller);
320
321 void isci_controller_start(void *controller);
322
323 void isci_controller_release_queued_ccbs(struct ISCI_CONTROLLER *controller);
324
325 void isci_domain_construct(struct ISCI_DOMAIN *domain, uint32_t domain_index,
326     struct ISCI_CONTROLLER *controller);
327
328 void isci_interrupt_setup(struct isci_softc *isci);
329 void isci_interrupt_poll_handler(struct ISCI_CONTROLLER *controller);
330
331 void isci_log_message(uint32_t  verbosity, char *log_message_prefix,
332     char *log_message, ...);
333
334 extern uint32_t g_isci_debug_level;
335
336 #endif /* #ifndef _ISCI_H */