David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 1 | /* |
dann frazier | 1ce873a | 2010-10-15 10:14:34 -0600 | [diff] [blame] | 2 | * Driver for the HP iLO management processor. |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2008 Hewlett-Packard Development Company, L.P. |
| 5 | * David Altobelli <david.altobelli@hp.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/types.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/fs.h> |
| 15 | #include <linux/pci.h> |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 16 | #include <linux/interrupt.h> |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 17 | #include <linux/ioport.h> |
| 18 | #include <linux/device.h> |
| 19 | #include <linux/file.h> |
| 20 | #include <linux/cdev.h> |
Alexey Dobriyan | d43c36d | 2009-10-07 17:09:06 +0400 | [diff] [blame] | 21 | #include <linux/sched.h> |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 22 | #include <linux/spinlock.h> |
| 23 | #include <linux/delay.h> |
| 24 | #include <linux/uaccess.h> |
| 25 | #include <linux/io.h> |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 26 | #include <linux/wait.h> |
David Altobelli | 4a35147 | 2009-08-17 17:08:01 -0600 | [diff] [blame] | 27 | #include <linux/poll.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 28 | #include <linux/slab.h> |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 29 | #include "hpilo.h" |
| 30 | |
| 31 | static struct class *ilo_class; |
| 32 | static unsigned int ilo_major; |
Mark Rusk | ebf1b76 | 2012-11-06 14:33:13 -0600 | [diff] [blame] | 33 | static unsigned int max_ccb = 16; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 34 | static char ilo_hwdev[MAX_ILO_DEV]; |
| 35 | |
| 36 | static inline int get_entry_id(int entry) |
| 37 | { |
| 38 | return (entry & ENTRY_MASK_DESCRIPTOR) >> ENTRY_BITPOS_DESCRIPTOR; |
| 39 | } |
| 40 | |
| 41 | static inline int get_entry_len(int entry) |
| 42 | { |
| 43 | return ((entry & ENTRY_MASK_QWORDS) >> ENTRY_BITPOS_QWORDS) << 3; |
| 44 | } |
| 45 | |
| 46 | static inline int mk_entry(int id, int len) |
| 47 | { |
| 48 | int qlen = len & 7 ? (len >> 3) + 1 : len >> 3; |
| 49 | return id << ENTRY_BITPOS_DESCRIPTOR | qlen << ENTRY_BITPOS_QWORDS; |
| 50 | } |
| 51 | |
| 52 | static inline int desc_mem_sz(int nr_entry) |
| 53 | { |
| 54 | return nr_entry << L2_QENTRY_SZ; |
| 55 | } |
| 56 | |
| 57 | /* |
| 58 | * FIFO queues, shared with hardware. |
| 59 | * |
| 60 | * If a queue has empty slots, an entry is added to the queue tail, |
| 61 | * and that entry is marked as occupied. |
| 62 | * Entries can be dequeued from the head of the list, when the device |
| 63 | * has marked the entry as consumed. |
| 64 | * |
| 65 | * Returns true on successful queue/dequeue, false on failure. |
| 66 | */ |
| 67 | static int fifo_enqueue(struct ilo_hwinfo *hw, char *fifobar, int entry) |
| 68 | { |
| 69 | struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar); |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 70 | unsigned long flags; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 71 | int ret = 0; |
| 72 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 73 | spin_lock_irqsave(&hw->fifo_lock, flags); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 74 | if (!(fifo_q->fifobar[(fifo_q->tail + 1) & fifo_q->imask] |
| 75 | & ENTRY_MASK_O)) { |
| 76 | fifo_q->fifobar[fifo_q->tail & fifo_q->imask] |= |
| 77 | (entry & ENTRY_MASK_NOSTATE) | fifo_q->merge; |
| 78 | fifo_q->tail += 1; |
| 79 | ret = 1; |
| 80 | } |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 81 | spin_unlock_irqrestore(&hw->fifo_lock, flags); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 82 | |
| 83 | return ret; |
| 84 | } |
| 85 | |
| 86 | static int fifo_dequeue(struct ilo_hwinfo *hw, char *fifobar, int *entry) |
| 87 | { |
| 88 | struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar); |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 89 | unsigned long flags; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 90 | int ret = 0; |
| 91 | u64 c; |
| 92 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 93 | spin_lock_irqsave(&hw->fifo_lock, flags); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 94 | c = fifo_q->fifobar[fifo_q->head & fifo_q->imask]; |
| 95 | if (c & ENTRY_MASK_C) { |
| 96 | if (entry) |
| 97 | *entry = c & ENTRY_MASK_NOSTATE; |
| 98 | |
| 99 | fifo_q->fifobar[fifo_q->head & fifo_q->imask] = |
| 100 | (c | ENTRY_MASK) + 1; |
| 101 | fifo_q->head += 1; |
| 102 | ret = 1; |
| 103 | } |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 104 | spin_unlock_irqrestore(&hw->fifo_lock, flags); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 105 | |
| 106 | return ret; |
| 107 | } |
| 108 | |
David Altobelli | 4a35147 | 2009-08-17 17:08:01 -0600 | [diff] [blame] | 109 | static int fifo_check_recv(struct ilo_hwinfo *hw, char *fifobar) |
| 110 | { |
| 111 | struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar); |
| 112 | unsigned long flags; |
| 113 | int ret = 0; |
| 114 | u64 c; |
| 115 | |
| 116 | spin_lock_irqsave(&hw->fifo_lock, flags); |
| 117 | c = fifo_q->fifobar[fifo_q->head & fifo_q->imask]; |
| 118 | if (c & ENTRY_MASK_C) |
| 119 | ret = 1; |
| 120 | spin_unlock_irqrestore(&hw->fifo_lock, flags); |
| 121 | |
| 122 | return ret; |
| 123 | } |
| 124 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 125 | static int ilo_pkt_enqueue(struct ilo_hwinfo *hw, struct ccb *ccb, |
| 126 | int dir, int id, int len) |
| 127 | { |
| 128 | char *fifobar; |
| 129 | int entry; |
| 130 | |
| 131 | if (dir == SENDQ) |
| 132 | fifobar = ccb->ccb_u1.send_fifobar; |
| 133 | else |
| 134 | fifobar = ccb->ccb_u3.recv_fifobar; |
| 135 | |
| 136 | entry = mk_entry(id, len); |
| 137 | return fifo_enqueue(hw, fifobar, entry); |
| 138 | } |
| 139 | |
| 140 | static int ilo_pkt_dequeue(struct ilo_hwinfo *hw, struct ccb *ccb, |
| 141 | int dir, int *id, int *len, void **pkt) |
| 142 | { |
| 143 | char *fifobar, *desc; |
| 144 | int entry = 0, pkt_id = 0; |
| 145 | int ret; |
| 146 | |
| 147 | if (dir == SENDQ) { |
| 148 | fifobar = ccb->ccb_u1.send_fifobar; |
| 149 | desc = ccb->ccb_u2.send_desc; |
| 150 | } else { |
| 151 | fifobar = ccb->ccb_u3.recv_fifobar; |
| 152 | desc = ccb->ccb_u4.recv_desc; |
| 153 | } |
| 154 | |
| 155 | ret = fifo_dequeue(hw, fifobar, &entry); |
| 156 | if (ret) { |
| 157 | pkt_id = get_entry_id(entry); |
| 158 | if (id) |
| 159 | *id = pkt_id; |
| 160 | if (len) |
| 161 | *len = get_entry_len(entry); |
| 162 | if (pkt) |
| 163 | *pkt = (void *)(desc + desc_mem_sz(pkt_id)); |
| 164 | } |
| 165 | |
| 166 | return ret; |
| 167 | } |
| 168 | |
David Altobelli | 4a35147 | 2009-08-17 17:08:01 -0600 | [diff] [blame] | 169 | static int ilo_pkt_recv(struct ilo_hwinfo *hw, struct ccb *ccb) |
| 170 | { |
| 171 | char *fifobar = ccb->ccb_u3.recv_fifobar; |
| 172 | |
| 173 | return fifo_check_recv(hw, fifobar); |
| 174 | } |
| 175 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 176 | static inline void doorbell_set(struct ccb *ccb) |
| 177 | { |
| 178 | iowrite8(1, ccb->ccb_u5.db_base); |
| 179 | } |
| 180 | |
| 181 | static inline void doorbell_clr(struct ccb *ccb) |
| 182 | { |
| 183 | iowrite8(2, ccb->ccb_u5.db_base); |
| 184 | } |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 185 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 186 | static inline int ctrl_set(int l2sz, int idxmask, int desclim) |
| 187 | { |
| 188 | int active = 0, go = 1; |
| 189 | return l2sz << CTRL_BITPOS_L2SZ | |
| 190 | idxmask << CTRL_BITPOS_FIFOINDEXMASK | |
| 191 | desclim << CTRL_BITPOS_DESCLIMIT | |
| 192 | active << CTRL_BITPOS_A | |
| 193 | go << CTRL_BITPOS_G; |
| 194 | } |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 195 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 196 | static void ctrl_setup(struct ccb *ccb, int nr_desc, int l2desc_sz) |
| 197 | { |
| 198 | /* for simplicity, use the same parameters for send and recv ctrls */ |
| 199 | ccb->send_ctrl = ctrl_set(l2desc_sz, nr_desc-1, nr_desc-1); |
| 200 | ccb->recv_ctrl = ctrl_set(l2desc_sz, nr_desc-1, nr_desc-1); |
| 201 | } |
| 202 | |
| 203 | static inline int fifo_sz(int nr_entry) |
| 204 | { |
| 205 | /* size of a fifo is determined by the number of entries it contains */ |
| 206 | return (nr_entry * sizeof(u64)) + FIFOHANDLESIZE; |
| 207 | } |
| 208 | |
| 209 | static void fifo_setup(void *base_addr, int nr_entry) |
| 210 | { |
| 211 | struct fifo *fifo_q = base_addr; |
| 212 | int i; |
| 213 | |
| 214 | /* set up an empty fifo */ |
| 215 | fifo_q->head = 0; |
| 216 | fifo_q->tail = 0; |
| 217 | fifo_q->reset = 0; |
| 218 | fifo_q->nrents = nr_entry; |
| 219 | fifo_q->imask = nr_entry - 1; |
| 220 | fifo_q->merge = ENTRY_MASK_O; |
| 221 | |
| 222 | for (i = 0; i < nr_entry; i++) |
| 223 | fifo_q->fifobar[i] = 0; |
| 224 | } |
| 225 | |
| 226 | static void ilo_ccb_close(struct pci_dev *pdev, struct ccb_data *data) |
| 227 | { |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 228 | struct ccb *driver_ccb = &data->driver_ccb; |
| 229 | struct ccb __iomem *device_ccb = data->mapped_ccb; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 230 | int retries; |
| 231 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 232 | /* complicated dance to tell the hw we are stopping */ |
| 233 | doorbell_clr(driver_ccb); |
| 234 | iowrite32(ioread32(&device_ccb->send_ctrl) & ~(1 << CTRL_BITPOS_G), |
| 235 | &device_ccb->send_ctrl); |
| 236 | iowrite32(ioread32(&device_ccb->recv_ctrl) & ~(1 << CTRL_BITPOS_G), |
| 237 | &device_ccb->recv_ctrl); |
| 238 | |
| 239 | /* give iLO some time to process stop request */ |
David Altobelli | c073b2d | 2009-02-04 15:11:58 -0800 | [diff] [blame] | 240 | for (retries = MAX_WAIT; retries > 0; retries--) { |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 241 | doorbell_set(driver_ccb); |
David Altobelli | 891f7d7 | 2009-03-31 15:23:53 -0700 | [diff] [blame] | 242 | udelay(WAIT_TIME); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 243 | if (!(ioread32(&device_ccb->send_ctrl) & (1 << CTRL_BITPOS_A)) |
| 244 | && |
| 245 | !(ioread32(&device_ccb->recv_ctrl) & (1 << CTRL_BITPOS_A))) |
| 246 | break; |
| 247 | } |
| 248 | if (retries == 0) |
| 249 | dev_err(&pdev->dev, "Closing, but controller still active\n"); |
| 250 | |
| 251 | /* clear the hw ccb */ |
| 252 | memset_io(device_ccb, 0, sizeof(struct ccb)); |
| 253 | |
| 254 | /* free resources used to back send/recv queues */ |
| 255 | pci_free_consistent(pdev, data->dma_size, data->dma_va, data->dma_pa); |
| 256 | } |
| 257 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 258 | static int ilo_ccb_setup(struct ilo_hwinfo *hw, struct ccb_data *data, int slot) |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 259 | { |
Prarit Bhargava | cdf8afc | 2010-08-09 17:20:27 -0700 | [diff] [blame] | 260 | char *dma_va; |
| 261 | dma_addr_t dma_pa; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 262 | struct ccb *driver_ccb, *ilo_ccb; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 263 | |
| 264 | driver_ccb = &data->driver_ccb; |
| 265 | ilo_ccb = &data->ilo_ccb; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 266 | |
| 267 | data->dma_size = 2 * fifo_sz(NR_QENTRY) + |
| 268 | 2 * desc_mem_sz(NR_QENTRY) + |
| 269 | ILO_START_ALIGN + ILO_CACHE_SZ; |
| 270 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 271 | data->dma_va = pci_alloc_consistent(hw->ilo_dev, data->dma_size, |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 272 | &data->dma_pa); |
| 273 | if (!data->dma_va) |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 274 | return -ENOMEM; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 275 | |
| 276 | dma_va = (char *)data->dma_va; |
Prarit Bhargava | cdf8afc | 2010-08-09 17:20:27 -0700 | [diff] [blame] | 277 | dma_pa = data->dma_pa; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 278 | |
| 279 | memset(dma_va, 0, data->dma_size); |
| 280 | |
| 281 | dma_va = (char *)roundup((unsigned long)dma_va, ILO_START_ALIGN); |
Prarit Bhargava | cdf8afc | 2010-08-09 17:20:27 -0700 | [diff] [blame] | 282 | dma_pa = roundup(dma_pa, ILO_START_ALIGN); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 283 | |
| 284 | /* |
| 285 | * Create two ccb's, one with virt addrs, one with phys addrs. |
| 286 | * Copy the phys addr ccb to device shared mem. |
| 287 | */ |
| 288 | ctrl_setup(driver_ccb, NR_QENTRY, L2_QENTRY_SZ); |
| 289 | ctrl_setup(ilo_ccb, NR_QENTRY, L2_QENTRY_SZ); |
| 290 | |
| 291 | fifo_setup(dma_va, NR_QENTRY); |
| 292 | driver_ccb->ccb_u1.send_fifobar = dma_va + FIFOHANDLESIZE; |
Prarit Bhargava | cdf8afc | 2010-08-09 17:20:27 -0700 | [diff] [blame] | 293 | ilo_ccb->ccb_u1.send_fifobar_pa = dma_pa + FIFOHANDLESIZE; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 294 | dma_va += fifo_sz(NR_QENTRY); |
| 295 | dma_pa += fifo_sz(NR_QENTRY); |
| 296 | |
| 297 | dma_va = (char *)roundup((unsigned long)dma_va, ILO_CACHE_SZ); |
Prarit Bhargava | cdf8afc | 2010-08-09 17:20:27 -0700 | [diff] [blame] | 298 | dma_pa = roundup(dma_pa, ILO_CACHE_SZ); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 299 | |
| 300 | fifo_setup(dma_va, NR_QENTRY); |
| 301 | driver_ccb->ccb_u3.recv_fifobar = dma_va + FIFOHANDLESIZE; |
Prarit Bhargava | cdf8afc | 2010-08-09 17:20:27 -0700 | [diff] [blame] | 302 | ilo_ccb->ccb_u3.recv_fifobar_pa = dma_pa + FIFOHANDLESIZE; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 303 | dma_va += fifo_sz(NR_QENTRY); |
| 304 | dma_pa += fifo_sz(NR_QENTRY); |
| 305 | |
| 306 | driver_ccb->ccb_u2.send_desc = dma_va; |
Prarit Bhargava | cdf8afc | 2010-08-09 17:20:27 -0700 | [diff] [blame] | 307 | ilo_ccb->ccb_u2.send_desc_pa = dma_pa; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 308 | dma_pa += desc_mem_sz(NR_QENTRY); |
| 309 | dma_va += desc_mem_sz(NR_QENTRY); |
| 310 | |
| 311 | driver_ccb->ccb_u4.recv_desc = dma_va; |
Prarit Bhargava | cdf8afc | 2010-08-09 17:20:27 -0700 | [diff] [blame] | 312 | ilo_ccb->ccb_u4.recv_desc_pa = dma_pa; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 313 | |
| 314 | driver_ccb->channel = slot; |
| 315 | ilo_ccb->channel = slot; |
| 316 | |
| 317 | driver_ccb->ccb_u5.db_base = hw->db_vaddr + (slot << L2_DB_SIZE); |
| 318 | ilo_ccb->ccb_u5.db_base = NULL; /* hw ccb's doorbell is not used */ |
| 319 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 320 | return 0; |
| 321 | } |
| 322 | |
| 323 | static void ilo_ccb_open(struct ilo_hwinfo *hw, struct ccb_data *data, int slot) |
| 324 | { |
| 325 | int pkt_id, pkt_sz; |
| 326 | struct ccb *driver_ccb = &data->driver_ccb; |
| 327 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 328 | /* copy the ccb with physical addrs to device memory */ |
| 329 | data->mapped_ccb = (struct ccb __iomem *) |
| 330 | (hw->ram_vaddr + (slot * ILOHW_CCB_SZ)); |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 331 | memcpy_toio(data->mapped_ccb, &data->ilo_ccb, sizeof(struct ccb)); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 332 | |
| 333 | /* put packets on the send and receive queues */ |
| 334 | pkt_sz = 0; |
| 335 | for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++) { |
| 336 | ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, pkt_sz); |
| 337 | doorbell_set(driver_ccb); |
| 338 | } |
| 339 | |
| 340 | pkt_sz = desc_mem_sz(1); |
| 341 | for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++) |
| 342 | ilo_pkt_enqueue(hw, driver_ccb, RECVQ, pkt_id, pkt_sz); |
| 343 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 344 | /* the ccb is ready to use */ |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 345 | doorbell_clr(driver_ccb); |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 346 | } |
| 347 | |
| 348 | static int ilo_ccb_verify(struct ilo_hwinfo *hw, struct ccb_data *data) |
| 349 | { |
| 350 | int pkt_id, i; |
| 351 | struct ccb *driver_ccb = &data->driver_ccb; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 352 | |
| 353 | /* make sure iLO is really handling requests */ |
David Altobelli | c073b2d | 2009-02-04 15:11:58 -0800 | [diff] [blame] | 354 | for (i = MAX_WAIT; i > 0; i--) { |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 355 | if (ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, NULL, NULL)) |
| 356 | break; |
David Altobelli | 891f7d7 | 2009-03-31 15:23:53 -0700 | [diff] [blame] | 357 | udelay(WAIT_TIME); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 358 | } |
| 359 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 360 | if (i == 0) { |
| 361 | dev_err(&hw->ilo_dev->dev, "Open could not dequeue a packet\n"); |
| 362 | return -EBUSY; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 363 | } |
| 364 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 365 | ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, 0); |
| 366 | doorbell_set(driver_ccb); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 367 | return 0; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 368 | } |
| 369 | |
| 370 | static inline int is_channel_reset(struct ccb *ccb) |
| 371 | { |
| 372 | /* check for this particular channel needing a reset */ |
| 373 | return FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset; |
| 374 | } |
| 375 | |
| 376 | static inline void set_channel_reset(struct ccb *ccb) |
| 377 | { |
| 378 | /* set a flag indicating this channel needs a reset */ |
| 379 | FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset = 1; |
| 380 | } |
| 381 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 382 | static inline int get_device_outbound(struct ilo_hwinfo *hw) |
| 383 | { |
| 384 | return ioread32(&hw->mmio_vaddr[DB_OUT]); |
| 385 | } |
| 386 | |
| 387 | static inline int is_db_reset(int db_out) |
| 388 | { |
| 389 | return db_out & (1 << DB_RESET); |
| 390 | } |
| 391 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 392 | static inline int is_device_reset(struct ilo_hwinfo *hw) |
| 393 | { |
| 394 | /* check for global reset condition */ |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 395 | return is_db_reset(get_device_outbound(hw)); |
| 396 | } |
| 397 | |
| 398 | static inline void clear_pending_db(struct ilo_hwinfo *hw, int clr) |
| 399 | { |
| 400 | iowrite32(clr, &hw->mmio_vaddr[DB_OUT]); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 401 | } |
| 402 | |
| 403 | static inline void clear_device(struct ilo_hwinfo *hw) |
| 404 | { |
| 405 | /* clear the device (reset bits, pending channel entries) */ |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 406 | clear_pending_db(hw, -1); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 407 | } |
| 408 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 409 | static inline void ilo_enable_interrupts(struct ilo_hwinfo *hw) |
| 410 | { |
| 411 | iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) | 1, &hw->mmio_vaddr[DB_IRQ]); |
| 412 | } |
| 413 | |
| 414 | static inline void ilo_disable_interrupts(struct ilo_hwinfo *hw) |
| 415 | { |
| 416 | iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) & ~1, |
| 417 | &hw->mmio_vaddr[DB_IRQ]); |
| 418 | } |
| 419 | |
| 420 | static void ilo_set_reset(struct ilo_hwinfo *hw) |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 421 | { |
| 422 | int slot; |
| 423 | |
| 424 | /* |
| 425 | * Mapped memory is zeroed on ilo reset, so set a per ccb flag |
| 426 | * to indicate that this ccb needs to be closed and reopened. |
| 427 | */ |
Camuso, Tony | 98dcd59 | 2012-06-10 14:39:20 +0100 | [diff] [blame] | 428 | for (slot = 0; slot < max_ccb; slot++) { |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 429 | if (!hw->ccb_alloc[slot]) |
| 430 | continue; |
| 431 | set_channel_reset(&hw->ccb_alloc[slot]->driver_ccb); |
| 432 | } |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 433 | } |
| 434 | |
| 435 | static ssize_t ilo_read(struct file *fp, char __user *buf, |
| 436 | size_t len, loff_t *off) |
| 437 | { |
| 438 | int err, found, cnt, pkt_id, pkt_len; |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 439 | struct ccb_data *data = fp->private_data; |
| 440 | struct ccb *driver_ccb = &data->driver_ccb; |
| 441 | struct ilo_hwinfo *hw = data->ilo_hw; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 442 | void *pkt; |
| 443 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 444 | if (is_channel_reset(driver_ccb)) { |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 445 | /* |
| 446 | * If the device has been reset, applications |
| 447 | * need to close and reopen all ccbs. |
| 448 | */ |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 449 | return -ENODEV; |
| 450 | } |
| 451 | |
| 452 | /* |
| 453 | * This function is to be called when data is expected |
| 454 | * in the channel, and will return an error if no packet is found |
| 455 | * during the loop below. The sleep/retry logic is to allow |
| 456 | * applications to call read() immediately post write(), |
| 457 | * and give iLO some time to process the sent packet. |
| 458 | */ |
| 459 | cnt = 20; |
| 460 | do { |
| 461 | /* look for a received packet */ |
| 462 | found = ilo_pkt_dequeue(hw, driver_ccb, RECVQ, &pkt_id, |
| 463 | &pkt_len, &pkt); |
| 464 | if (found) |
| 465 | break; |
| 466 | cnt--; |
| 467 | msleep(100); |
| 468 | } while (!found && cnt); |
| 469 | |
| 470 | if (!found) |
| 471 | return -EAGAIN; |
| 472 | |
| 473 | /* only copy the length of the received packet */ |
| 474 | if (pkt_len < len) |
| 475 | len = pkt_len; |
| 476 | |
| 477 | err = copy_to_user(buf, pkt, len); |
| 478 | |
| 479 | /* return the received packet to the queue */ |
| 480 | ilo_pkt_enqueue(hw, driver_ccb, RECVQ, pkt_id, desc_mem_sz(1)); |
| 481 | |
| 482 | return err ? -EFAULT : len; |
| 483 | } |
| 484 | |
| 485 | static ssize_t ilo_write(struct file *fp, const char __user *buf, |
| 486 | size_t len, loff_t *off) |
| 487 | { |
| 488 | int err, pkt_id, pkt_len; |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 489 | struct ccb_data *data = fp->private_data; |
| 490 | struct ccb *driver_ccb = &data->driver_ccb; |
| 491 | struct ilo_hwinfo *hw = data->ilo_hw; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 492 | void *pkt; |
| 493 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 494 | if (is_channel_reset(driver_ccb)) |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 495 | return -ENODEV; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 496 | |
| 497 | /* get a packet to send the user command */ |
| 498 | if (!ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, &pkt_len, &pkt)) |
| 499 | return -EBUSY; |
| 500 | |
| 501 | /* limit the length to the length of the packet */ |
| 502 | if (pkt_len < len) |
| 503 | len = pkt_len; |
| 504 | |
| 505 | /* on failure, set the len to 0 to return empty packet to the device */ |
| 506 | err = copy_from_user(pkt, buf, len); |
| 507 | if (err) |
| 508 | len = 0; |
| 509 | |
| 510 | /* send the packet */ |
| 511 | ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, len); |
| 512 | doorbell_set(driver_ccb); |
| 513 | |
| 514 | return err ? -EFAULT : len; |
| 515 | } |
| 516 | |
David Altobelli | 4a35147 | 2009-08-17 17:08:01 -0600 | [diff] [blame] | 517 | static unsigned int ilo_poll(struct file *fp, poll_table *wait) |
| 518 | { |
| 519 | struct ccb_data *data = fp->private_data; |
| 520 | struct ccb *driver_ccb = &data->driver_ccb; |
| 521 | |
| 522 | poll_wait(fp, &data->ccb_waitq, wait); |
| 523 | |
| 524 | if (is_channel_reset(driver_ccb)) |
| 525 | return POLLERR; |
| 526 | else if (ilo_pkt_recv(data->ilo_hw, driver_ccb)) |
| 527 | return POLLIN | POLLRDNORM; |
| 528 | |
| 529 | return 0; |
| 530 | } |
| 531 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 532 | static int ilo_close(struct inode *ip, struct file *fp) |
| 533 | { |
| 534 | int slot; |
| 535 | struct ccb_data *data; |
| 536 | struct ilo_hwinfo *hw; |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 537 | unsigned long flags; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 538 | |
Camuso, Tony | 98dcd59 | 2012-06-10 14:39:20 +0100 | [diff] [blame] | 539 | slot = iminor(ip) % max_ccb; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 540 | hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev); |
| 541 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 542 | spin_lock(&hw->open_lock); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 543 | |
| 544 | if (hw->ccb_alloc[slot]->ccb_cnt == 1) { |
| 545 | |
| 546 | data = fp->private_data; |
| 547 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 548 | spin_lock_irqsave(&hw->alloc_lock, flags); |
| 549 | hw->ccb_alloc[slot] = NULL; |
| 550 | spin_unlock_irqrestore(&hw->alloc_lock, flags); |
| 551 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 552 | ilo_ccb_close(hw->ilo_dev, data); |
| 553 | |
| 554 | kfree(data); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 555 | } else |
| 556 | hw->ccb_alloc[slot]->ccb_cnt--; |
| 557 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 558 | spin_unlock(&hw->open_lock); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 559 | |
| 560 | return 0; |
| 561 | } |
| 562 | |
| 563 | static int ilo_open(struct inode *ip, struct file *fp) |
| 564 | { |
| 565 | int slot, error; |
| 566 | struct ccb_data *data; |
| 567 | struct ilo_hwinfo *hw; |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 568 | unsigned long flags; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 569 | |
Camuso, Tony | 98dcd59 | 2012-06-10 14:39:20 +0100 | [diff] [blame] | 570 | slot = iminor(ip) % max_ccb; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 571 | hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev); |
| 572 | |
| 573 | /* new ccb allocation */ |
| 574 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
| 575 | if (!data) |
| 576 | return -ENOMEM; |
| 577 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 578 | spin_lock(&hw->open_lock); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 579 | |
| 580 | /* each fd private_data holds sw/hw view of ccb */ |
| 581 | if (hw->ccb_alloc[slot] == NULL) { |
| 582 | /* create a channel control block for this minor */ |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 583 | error = ilo_ccb_setup(hw, data, slot); |
| 584 | if (error) { |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 585 | kfree(data); |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 586 | goto out; |
| 587 | } |
| 588 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 589 | data->ccb_cnt = 1; |
| 590 | data->ccb_excl = fp->f_flags & O_EXCL; |
| 591 | data->ilo_hw = hw; |
| 592 | init_waitqueue_head(&data->ccb_waitq); |
| 593 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 594 | /* write the ccb to hw */ |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 595 | spin_lock_irqsave(&hw->alloc_lock, flags); |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 596 | ilo_ccb_open(hw, data, slot); |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 597 | hw->ccb_alloc[slot] = data; |
| 598 | spin_unlock_irqrestore(&hw->alloc_lock, flags); |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 599 | |
| 600 | /* make sure the channel is functional */ |
| 601 | error = ilo_ccb_verify(hw, data); |
| 602 | if (error) { |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 603 | |
| 604 | spin_lock_irqsave(&hw->alloc_lock, flags); |
| 605 | hw->ccb_alloc[slot] = NULL; |
| 606 | spin_unlock_irqrestore(&hw->alloc_lock, flags); |
| 607 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 608 | ilo_ccb_close(hw->ilo_dev, data); |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 609 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 610 | kfree(data); |
| 611 | goto out; |
| 612 | } |
| 613 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 614 | } else { |
| 615 | kfree(data); |
| 616 | if (fp->f_flags & O_EXCL || hw->ccb_alloc[slot]->ccb_excl) { |
| 617 | /* |
| 618 | * The channel exists, and either this open |
| 619 | * or a previous open of this channel wants |
| 620 | * exclusive access. |
| 621 | */ |
| 622 | error = -EBUSY; |
| 623 | } else { |
| 624 | hw->ccb_alloc[slot]->ccb_cnt++; |
| 625 | error = 0; |
| 626 | } |
| 627 | } |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 628 | out: |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 629 | spin_unlock(&hw->open_lock); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 630 | |
| 631 | if (!error) |
| 632 | fp->private_data = hw->ccb_alloc[slot]; |
| 633 | |
| 634 | return error; |
| 635 | } |
| 636 | |
| 637 | static const struct file_operations ilo_fops = { |
| 638 | .owner = THIS_MODULE, |
| 639 | .read = ilo_read, |
| 640 | .write = ilo_write, |
David Altobelli | 4a35147 | 2009-08-17 17:08:01 -0600 | [diff] [blame] | 641 | .poll = ilo_poll, |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 642 | .open = ilo_open, |
| 643 | .release = ilo_close, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 644 | .llseek = noop_llseek, |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 645 | }; |
| 646 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 647 | static irqreturn_t ilo_isr(int irq, void *data) |
| 648 | { |
| 649 | struct ilo_hwinfo *hw = data; |
| 650 | int pending, i; |
| 651 | |
| 652 | spin_lock(&hw->alloc_lock); |
| 653 | |
| 654 | /* check for ccbs which have data */ |
| 655 | pending = get_device_outbound(hw); |
| 656 | if (!pending) { |
| 657 | spin_unlock(&hw->alloc_lock); |
| 658 | return IRQ_NONE; |
| 659 | } |
| 660 | |
| 661 | if (is_db_reset(pending)) { |
| 662 | /* wake up all ccbs if the device was reset */ |
| 663 | pending = -1; |
| 664 | ilo_set_reset(hw); |
| 665 | } |
| 666 | |
Camuso, Tony | 98dcd59 | 2012-06-10 14:39:20 +0100 | [diff] [blame] | 667 | for (i = 0; i < max_ccb; i++) { |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 668 | if (!hw->ccb_alloc[i]) |
| 669 | continue; |
| 670 | if (pending & (1 << i)) |
| 671 | wake_up_interruptible(&hw->ccb_alloc[i]->ccb_waitq); |
| 672 | } |
| 673 | |
| 674 | /* clear the device of the channels that have been handled */ |
| 675 | clear_pending_db(hw, pending); |
| 676 | |
| 677 | spin_unlock(&hw->alloc_lock); |
| 678 | |
| 679 | return IRQ_HANDLED; |
| 680 | } |
| 681 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 682 | static void ilo_unmap_device(struct pci_dev *pdev, struct ilo_hwinfo *hw) |
| 683 | { |
| 684 | pci_iounmap(pdev, hw->db_vaddr); |
| 685 | pci_iounmap(pdev, hw->ram_vaddr); |
| 686 | pci_iounmap(pdev, hw->mmio_vaddr); |
| 687 | } |
| 688 | |
Bill Pemberton | 80c8ae2 | 2012-11-19 13:23:05 -0500 | [diff] [blame] | 689 | static int ilo_map_device(struct pci_dev *pdev, struct ilo_hwinfo *hw) |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 690 | { |
| 691 | int error = -ENOMEM; |
| 692 | |
| 693 | /* map the memory mapped i/o registers */ |
| 694 | hw->mmio_vaddr = pci_iomap(pdev, 1, 0); |
| 695 | if (hw->mmio_vaddr == NULL) { |
| 696 | dev_err(&pdev->dev, "Error mapping mmio\n"); |
| 697 | goto out; |
| 698 | } |
| 699 | |
| 700 | /* map the adapter shared memory region */ |
Camuso, Tony | 98dcd59 | 2012-06-10 14:39:20 +0100 | [diff] [blame] | 701 | hw->ram_vaddr = pci_iomap(pdev, 2, max_ccb * ILOHW_CCB_SZ); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 702 | if (hw->ram_vaddr == NULL) { |
| 703 | dev_err(&pdev->dev, "Error mapping shared mem\n"); |
| 704 | goto mmio_free; |
| 705 | } |
| 706 | |
| 707 | /* map the doorbell aperture */ |
Camuso, Tony | 98dcd59 | 2012-06-10 14:39:20 +0100 | [diff] [blame] | 708 | hw->db_vaddr = pci_iomap(pdev, 3, max_ccb * ONE_DB_SIZE); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 709 | if (hw->db_vaddr == NULL) { |
| 710 | dev_err(&pdev->dev, "Error mapping doorbell\n"); |
| 711 | goto ram_free; |
| 712 | } |
| 713 | |
| 714 | return 0; |
| 715 | ram_free: |
| 716 | pci_iounmap(pdev, hw->ram_vaddr); |
| 717 | mmio_free: |
| 718 | pci_iounmap(pdev, hw->mmio_vaddr); |
| 719 | out: |
| 720 | return error; |
| 721 | } |
| 722 | |
| 723 | static void ilo_remove(struct pci_dev *pdev) |
| 724 | { |
| 725 | int i, minor; |
| 726 | struct ilo_hwinfo *ilo_hw = pci_get_drvdata(pdev); |
| 727 | |
Mark Rusk | ebf1b76 | 2012-11-06 14:33:13 -0600 | [diff] [blame] | 728 | if (!ilo_hw) |
| 729 | return; |
| 730 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 731 | clear_device(ilo_hw); |
| 732 | |
| 733 | minor = MINOR(ilo_hw->cdev.dev); |
Camuso, Tony | 98dcd59 | 2012-06-10 14:39:20 +0100 | [diff] [blame] | 734 | for (i = minor; i < minor + max_ccb; i++) |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 735 | device_destroy(ilo_class, MKDEV(ilo_major, i)); |
| 736 | |
| 737 | cdev_del(&ilo_hw->cdev); |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 738 | ilo_disable_interrupts(ilo_hw); |
| 739 | free_irq(pdev->irq, ilo_hw); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 740 | ilo_unmap_device(pdev, ilo_hw); |
| 741 | pci_release_regions(pdev); |
Jiri Slaby | bcdee04 | 2012-09-13 16:06:48 +0200 | [diff] [blame] | 742 | /* |
| 743 | * pci_disable_device(pdev) used to be here. But this PCI device has |
| 744 | * two functions with interrupt lines connected to a single pin. The |
| 745 | * other one is a USB host controller. So when we disable the PIN here |
| 746 | * e.g. by rmmod hpilo, the controller stops working. It is because |
| 747 | * the interrupt link is disabled in ACPI since it is not refcounted |
| 748 | * yet. See acpi_pci_link_free_irq called from acpi_pci_irq_disable. |
| 749 | */ |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 750 | kfree(ilo_hw); |
Camuso, Tony | 98dcd59 | 2012-06-10 14:39:20 +0100 | [diff] [blame] | 751 | ilo_hwdev[(minor / max_ccb)] = 0; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 752 | } |
| 753 | |
Bill Pemberton | 80c8ae2 | 2012-11-19 13:23:05 -0500 | [diff] [blame] | 754 | static int ilo_probe(struct pci_dev *pdev, |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 755 | const struct pci_device_id *ent) |
| 756 | { |
Mark Rusk | ebf1b76 | 2012-11-06 14:33:13 -0600 | [diff] [blame] | 757 | int devnum, minor, start, error = 0; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 758 | struct ilo_hwinfo *ilo_hw; |
| 759 | |
Mark Rusk | ebf1b76 | 2012-11-06 14:33:13 -0600 | [diff] [blame] | 760 | /* Ignore subsystem_device = 0x1979 (set by BIOS) */ |
| 761 | if (pdev->subsystem_device == 0x1979) |
Mark Rusk | eefbc59 | 2013-08-14 15:30:01 -0500 | [diff] [blame] | 762 | return 0; |
Mark Rusk | ebf1b76 | 2012-11-06 14:33:13 -0600 | [diff] [blame] | 763 | |
Camuso, Tony | 98dcd59 | 2012-06-10 14:39:20 +0100 | [diff] [blame] | 764 | if (max_ccb > MAX_CCB) |
| 765 | max_ccb = MAX_CCB; |
| 766 | else if (max_ccb < MIN_CCB) |
| 767 | max_ccb = MIN_CCB; |
| 768 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 769 | /* find a free range for device files */ |
| 770 | for (devnum = 0; devnum < MAX_ILO_DEV; devnum++) { |
| 771 | if (ilo_hwdev[devnum] == 0) { |
| 772 | ilo_hwdev[devnum] = 1; |
| 773 | break; |
| 774 | } |
| 775 | } |
| 776 | |
| 777 | if (devnum == MAX_ILO_DEV) { |
| 778 | dev_err(&pdev->dev, "Error finding free device\n"); |
| 779 | return -ENODEV; |
| 780 | } |
| 781 | |
| 782 | /* track global allocations for this device */ |
| 783 | error = -ENOMEM; |
| 784 | ilo_hw = kzalloc(sizeof(*ilo_hw), GFP_KERNEL); |
| 785 | if (!ilo_hw) |
| 786 | goto out; |
| 787 | |
| 788 | ilo_hw->ilo_dev = pdev; |
| 789 | spin_lock_init(&ilo_hw->alloc_lock); |
| 790 | spin_lock_init(&ilo_hw->fifo_lock); |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 791 | spin_lock_init(&ilo_hw->open_lock); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 792 | |
| 793 | error = pci_enable_device(pdev); |
| 794 | if (error) |
| 795 | goto free; |
| 796 | |
| 797 | pci_set_master(pdev); |
| 798 | |
| 799 | error = pci_request_regions(pdev, ILO_NAME); |
| 800 | if (error) |
| 801 | goto disable; |
| 802 | |
| 803 | error = ilo_map_device(pdev, ilo_hw); |
| 804 | if (error) |
| 805 | goto free_regions; |
| 806 | |
| 807 | pci_set_drvdata(pdev, ilo_hw); |
| 808 | clear_device(ilo_hw); |
| 809 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 810 | error = request_irq(pdev->irq, ilo_isr, IRQF_SHARED, "hpilo", ilo_hw); |
| 811 | if (error) |
| 812 | goto unmap; |
| 813 | |
| 814 | ilo_enable_interrupts(ilo_hw); |
| 815 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 816 | cdev_init(&ilo_hw->cdev, &ilo_fops); |
| 817 | ilo_hw->cdev.owner = THIS_MODULE; |
Camuso, Tony | 98dcd59 | 2012-06-10 14:39:20 +0100 | [diff] [blame] | 818 | start = devnum * max_ccb; |
| 819 | error = cdev_add(&ilo_hw->cdev, MKDEV(ilo_major, start), max_ccb); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 820 | if (error) { |
| 821 | dev_err(&pdev->dev, "Could not add cdev\n"); |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 822 | goto remove_isr; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 823 | } |
| 824 | |
Camuso, Tony | 98dcd59 | 2012-06-10 14:39:20 +0100 | [diff] [blame] | 825 | for (minor = 0 ; minor < max_ccb; minor++) { |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 826 | struct device *dev; |
| 827 | dev = device_create(ilo_class, &pdev->dev, |
| 828 | MKDEV(ilo_major, minor), NULL, |
| 829 | "hpilo!d%dccb%d", devnum, minor); |
| 830 | if (IS_ERR(dev)) |
| 831 | dev_err(&pdev->dev, "Could not create files\n"); |
| 832 | } |
| 833 | |
| 834 | return 0; |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 835 | remove_isr: |
| 836 | ilo_disable_interrupts(ilo_hw); |
| 837 | free_irq(pdev->irq, ilo_hw); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 838 | unmap: |
| 839 | ilo_unmap_device(pdev, ilo_hw); |
| 840 | free_regions: |
| 841 | pci_release_regions(pdev); |
| 842 | disable: |
Jiri Slaby | bcdee04 | 2012-09-13 16:06:48 +0200 | [diff] [blame] | 843 | /* pci_disable_device(pdev); see comment in ilo_remove */ |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 844 | free: |
| 845 | kfree(ilo_hw); |
| 846 | out: |
| 847 | ilo_hwdev[devnum] = 0; |
| 848 | return error; |
| 849 | } |
| 850 | |
| 851 | static struct pci_device_id ilo_devices[] = { |
| 852 | { PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xB204) }, |
David Altobelli | 31d8b56 | 2009-02-27 14:03:09 -0800 | [diff] [blame] | 853 | { PCI_DEVICE(PCI_VENDOR_ID_HP, 0x3307) }, |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 854 | { } |
| 855 | }; |
| 856 | MODULE_DEVICE_TABLE(pci, ilo_devices); |
| 857 | |
| 858 | static struct pci_driver ilo_driver = { |
| 859 | .name = ILO_NAME, |
| 860 | .id_table = ilo_devices, |
| 861 | .probe = ilo_probe, |
Bill Pemberton | 2d6bed9 | 2012-11-19 13:21:23 -0500 | [diff] [blame] | 862 | .remove = ilo_remove, |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 863 | }; |
| 864 | |
| 865 | static int __init ilo_init(void) |
| 866 | { |
| 867 | int error; |
| 868 | dev_t dev; |
| 869 | |
| 870 | ilo_class = class_create(THIS_MODULE, "iLO"); |
| 871 | if (IS_ERR(ilo_class)) { |
| 872 | error = PTR_ERR(ilo_class); |
| 873 | goto out; |
| 874 | } |
| 875 | |
| 876 | error = alloc_chrdev_region(&dev, 0, MAX_OPEN, ILO_NAME); |
| 877 | if (error) |
| 878 | goto class_destroy; |
| 879 | |
| 880 | ilo_major = MAJOR(dev); |
| 881 | |
| 882 | error = pci_register_driver(&ilo_driver); |
| 883 | if (error) |
| 884 | goto chr_remove; |
| 885 | |
| 886 | return 0; |
| 887 | chr_remove: |
| 888 | unregister_chrdev_region(dev, MAX_OPEN); |
| 889 | class_destroy: |
| 890 | class_destroy(ilo_class); |
| 891 | out: |
| 892 | return error; |
| 893 | } |
| 894 | |
| 895 | static void __exit ilo_exit(void) |
| 896 | { |
| 897 | pci_unregister_driver(&ilo_driver); |
| 898 | unregister_chrdev_region(MKDEV(ilo_major, 0), MAX_OPEN); |
| 899 | class_destroy(ilo_class); |
| 900 | } |
| 901 | |
Mark Rusk | eefbc59 | 2013-08-14 15:30:01 -0500 | [diff] [blame] | 902 | MODULE_VERSION("1.4.1"); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 903 | MODULE_ALIAS(ILO_NAME); |
| 904 | MODULE_DESCRIPTION(ILO_NAME); |
| 905 | MODULE_AUTHOR("David Altobelli <david.altobelli@hp.com>"); |
| 906 | MODULE_LICENSE("GPL v2"); |
| 907 | |
Camuso, Tony | 98dcd59 | 2012-06-10 14:39:20 +0100 | [diff] [blame] | 908 | module_param(max_ccb, uint, 0444); |
Masanari Iida | 7a56f32 | 2015-09-18 12:32:12 +0900 | [diff] [blame^] | 909 | MODULE_PARM_DESC(max_ccb, "Maximum number of HP iLO channels to attach (8-24)(default=16)"); |
Camuso, Tony | 98dcd59 | 2012-06-10 14:39:20 +0100 | [diff] [blame] | 910 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 911 | module_init(ilo_init); |
| 912 | module_exit(ilo_exit); |