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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_PHY
147 {
148         struct cdev             *cdev_fault;
149         struct cdev             *cdev_locate;
150         SCI_CONTROLLER_HANDLE_T handle;
151         int                     index;
152         int                     led_fault;
153         int                     led_locate;
154 };
155
156 struct ISCI_CONTROLLER
157 {
158         struct isci_softc       *isci;
159         uint8_t                 index;
160         SCI_CONTROLLER_HANDLE_T scif_controller_handle;
161         struct ISCI_DOMAIN      domain[SCI_MAX_DOMAINS];
162         BOOL                    is_started;
163         BOOL                    has_been_scanned;
164         uint32_t                initial_discovery_mask;
165         BOOL                    is_frozen;
166         BOOL                    release_queued_ccbs;
167         uint8_t                 *remote_device_memory;
168         struct ISCI_MEMORY      cached_controller_memory;
169         struct ISCI_MEMORY      uncached_controller_memory;
170         struct ISCI_MEMORY      request_memory;
171         bus_dma_tag_t           buffer_dma_tag;
172         struct mtx              lock;
173         struct cam_sim          *sim;
174         struct cam_path         *path;
175         struct ISCI_REMOTE_DEVICE *remote_device[SCI_MAX_REMOTE_DEVICES];
176         void                    *timer_memory;
177         SCIC_OEM_PARAMETERS_T   oem_parameters;
178         uint32_t                oem_parameters_version;
179         uint32_t                queue_depth;
180         uint32_t                sim_queue_depth;
181         SCI_FAST_LIST_T         pending_device_reset_list;
182         struct ISCI_PHY         phys[SCI_MAX_PHYS];
183
184         SCI_MEMORY_DESCRIPTOR_LIST_HANDLE_T mdl;
185
186         SCI_POOL_CREATE(remote_device_pool, struct ISCI_REMOTE_DEVICE *, SCI_MAX_REMOTE_DEVICES);
187         SCI_POOL_CREATE(request_pool, struct ISCI_REQUEST *, SCI_MAX_IO_REQUESTS);
188         SCI_POOL_CREATE(timer_pool, struct ISCI_TIMER *, SCI_MAX_TIMERS);
189         SCI_POOL_CREATE(unmap_buffer_pool, void *, SCI_MAX_REMOTE_DEVICES);
190 };
191
192 struct ISCI_REQUEST
193 {
194         SCI_CONTROLLER_HANDLE_T         controller_handle;
195         SCI_REMOTE_DEVICE_HANDLE_T      remote_device_handle;
196         bus_dma_tag_t                   dma_tag;
197         bus_dmamap_t                    dma_map;
198         SCI_PHYSICAL_ADDRESS            physical_address;
199         struct callout                  timer;
200 };
201
202 struct ISCI_IO_REQUEST
203 {
204         struct ISCI_REQUEST     parent;
205         SCI_IO_REQUEST_HANDLE_T sci_object;
206         union ccb               *ccb;
207         uint32_t                num_segments;
208         uint32_t                current_sge_index;
209         bus_dma_segment_t       *sge;
210 };
211
212 struct ISCI_TASK_REQUEST
213 {
214         struct ISCI_REQUEST             parent;
215         struct scsi_sense_data          sense_data;
216         SCI_TASK_REQUEST_HANDLE_T       sci_object;
217         union ccb                       *ccb;
218
219 };
220
221 struct ISCI_PCI_BAR {
222
223         bus_space_tag_t         bus_tag;
224         bus_space_handle_t      bus_handle;
225         int                     resource_id;
226         struct resource         *resource;
227
228 };
229
230 /*
231  * One of these per allocated PCI device.
232  */
233 struct isci_softc {
234
235         struct ISCI_PCI_BAR                     pci_bar[ISCI_NUM_PCI_BARS];
236         struct ISCI_CONTROLLER                  controllers[SCI_MAX_CONTROLLERS];
237         SCI_LIBRARY_HANDLE_T                    sci_library_handle;
238         void *                                  sci_library_memory;
239         SCIC_CONTROLLER_HANDLER_METHODS_T       handlers[4];
240         struct ISCI_INTERRUPT_INFO              interrupt_info[4];
241         uint32_t                                controller_count;
242         uint32_t                                num_interrupts;
243         uint32_t                                coalesce_number;
244         uint32_t                                coalesce_timeout;
245         device_t                                device;
246         SCI_PCI_COMMON_HEADER_T                 pci_common_header;
247         BOOL                                    oem_parameters_found;
248         struct intr_config_hook                 config_hook;
249 };
250
251 int isci_allocate_resources(device_t device);
252
253 int isci_allocate_dma_buffer(device_t device, struct ISCI_MEMORY *memory);
254
255 void isci_remote_device_reset(struct ISCI_REMOTE_DEVICE *remote_device,
256     union ccb *ccb);
257
258 /**
259  *  Returns the negotiated link rate (in KB/s) for the associated
260  *      remote device.  Used to fill out bitrate field for GET_TRANS_SETTINGS.
261  *      Will match the negotiated link rate for the lowest numbered local phy
262  *      in the port/domain containing this remote device.
263  */
264 uint32_t isci_remote_device_get_bitrate(
265     struct ISCI_REMOTE_DEVICE *remote_device);
266
267 void isci_remote_device_freeze_lun_queue(
268     struct ISCI_REMOTE_DEVICE *remote_device, lun_id_t lun);
269
270 void isci_remote_device_release_lun_queue(
271     struct ISCI_REMOTE_DEVICE *remote_device, lun_id_t lun);
272
273 void isci_remote_device_release_device_queue(
274     struct ISCI_REMOTE_DEVICE * remote_device);
275
276 void isci_request_construct(struct ISCI_REQUEST *request,
277     SCI_CONTROLLER_HANDLE_T scif_controller_handle,
278     bus_dma_tag_t io_buffer_dma_tag, bus_addr_t physical_address);
279
280 #define isci_io_request_get_max_io_size() \
281         ((SCI_MAX_SCATTER_GATHER_ELEMENTS - 1) * PAGE_SIZE)
282
283 #define isci_task_request_get_object_size() \
284         (sizeof(struct ISCI_TASK_REQUEST) + scif_task_request_get_object_size())
285
286 #define isci_io_request_get_object_size() \
287         (sizeof(struct ISCI_IO_REQUEST) + scif_io_request_get_object_size())
288
289 #define isci_request_get_object_size() \
290         max( \
291             isci_task_request_get_object_size(), \
292             isci_io_request_get_object_size() \
293         )
294
295
296 void isci_io_request_execute_scsi_io(union ccb *ccb,
297     struct ISCI_CONTROLLER *controller);
298
299 #if __FreeBSD_version >= 900026
300 void isci_io_request_execute_smp_io(
301     union ccb *ccb, struct ISCI_CONTROLLER *controller);
302 #endif
303
304 void isci_io_request_timeout(void *);
305
306 void isci_get_oem_parameters(struct isci_softc *isci);
307
308 void isci_io_request_complete(
309     SCI_CONTROLLER_HANDLE_T scif_controller,
310     SCI_REMOTE_DEVICE_HANDLE_T remote_device,
311     struct ISCI_IO_REQUEST * isci_request, SCI_IO_STATUS completion_status);
312
313 void isci_task_request_complete(
314     SCI_CONTROLLER_HANDLE_T scif_controller,
315     SCI_REMOTE_DEVICE_HANDLE_T remote_device,
316     SCI_TASK_REQUEST_HANDLE_T io_request, SCI_TASK_STATUS completion_status);
317
318 void isci_sysctl_initialize(struct isci_softc *isci);
319
320 void isci_controller_construct(struct ISCI_CONTROLLER *controller,
321     struct isci_softc *isci);
322
323 SCI_STATUS isci_controller_initialize(struct ISCI_CONTROLLER *controller);
324
325 int isci_controller_allocate_memory(struct ISCI_CONTROLLER *controller);
326
327 void isci_controller_domain_discovery_complete(
328     struct ISCI_CONTROLLER *isci_controller, struct ISCI_DOMAIN *isci_domain);
329
330 int isci_controller_attach_to_cam(struct ISCI_CONTROLLER *controller);
331
332 void isci_controller_start(void *controller);
333
334 void isci_controller_release_queued_ccbs(struct ISCI_CONTROLLER *controller);
335
336 void isci_domain_construct(struct ISCI_DOMAIN *domain, uint32_t domain_index,
337     struct ISCI_CONTROLLER *controller);
338
339 void isci_interrupt_setup(struct isci_softc *isci);
340 void isci_interrupt_poll_handler(struct ISCI_CONTROLLER *controller);
341
342 void isci_log_message(uint32_t  verbosity, char *log_message_prefix,
343     char *log_message, ...);
344
345 extern uint32_t g_isci_debug_level;
346
347 #endif /* #ifndef _ISCI_H */