David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Driver for HP iLO/iLO2 management processor. |
| 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; |
| 33 | static char ilo_hwdev[MAX_ILO_DEV]; |
| 34 | |
| 35 | static inline int get_entry_id(int entry) |
| 36 | { |
| 37 | return (entry & ENTRY_MASK_DESCRIPTOR) >> ENTRY_BITPOS_DESCRIPTOR; |
| 38 | } |
| 39 | |
| 40 | static inline int get_entry_len(int entry) |
| 41 | { |
| 42 | return ((entry & ENTRY_MASK_QWORDS) >> ENTRY_BITPOS_QWORDS) << 3; |
| 43 | } |
| 44 | |
| 45 | static inline int mk_entry(int id, int len) |
| 46 | { |
| 47 | int qlen = len & 7 ? (len >> 3) + 1 : len >> 3; |
| 48 | return id << ENTRY_BITPOS_DESCRIPTOR | qlen << ENTRY_BITPOS_QWORDS; |
| 49 | } |
| 50 | |
| 51 | static inline int desc_mem_sz(int nr_entry) |
| 52 | { |
| 53 | return nr_entry << L2_QENTRY_SZ; |
| 54 | } |
| 55 | |
| 56 | /* |
| 57 | * FIFO queues, shared with hardware. |
| 58 | * |
| 59 | * If a queue has empty slots, an entry is added to the queue tail, |
| 60 | * and that entry is marked as occupied. |
| 61 | * Entries can be dequeued from the head of the list, when the device |
| 62 | * has marked the entry as consumed. |
| 63 | * |
| 64 | * Returns true on successful queue/dequeue, false on failure. |
| 65 | */ |
| 66 | static int fifo_enqueue(struct ilo_hwinfo *hw, char *fifobar, int entry) |
| 67 | { |
| 68 | struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar); |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 69 | unsigned long flags; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 70 | int ret = 0; |
| 71 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 72 | spin_lock_irqsave(&hw->fifo_lock, flags); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 73 | if (!(fifo_q->fifobar[(fifo_q->tail + 1) & fifo_q->imask] |
| 74 | & ENTRY_MASK_O)) { |
| 75 | fifo_q->fifobar[fifo_q->tail & fifo_q->imask] |= |
| 76 | (entry & ENTRY_MASK_NOSTATE) | fifo_q->merge; |
| 77 | fifo_q->tail += 1; |
| 78 | ret = 1; |
| 79 | } |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 80 | spin_unlock_irqrestore(&hw->fifo_lock, flags); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 81 | |
| 82 | return ret; |
| 83 | } |
| 84 | |
| 85 | static int fifo_dequeue(struct ilo_hwinfo *hw, char *fifobar, int *entry) |
| 86 | { |
| 87 | struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar); |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 88 | unsigned long flags; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 89 | int ret = 0; |
| 90 | u64 c; |
| 91 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 92 | spin_lock_irqsave(&hw->fifo_lock, flags); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 93 | c = fifo_q->fifobar[fifo_q->head & fifo_q->imask]; |
| 94 | if (c & ENTRY_MASK_C) { |
| 95 | if (entry) |
| 96 | *entry = c & ENTRY_MASK_NOSTATE; |
| 97 | |
| 98 | fifo_q->fifobar[fifo_q->head & fifo_q->imask] = |
| 99 | (c | ENTRY_MASK) + 1; |
| 100 | fifo_q->head += 1; |
| 101 | ret = 1; |
| 102 | } |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 103 | spin_unlock_irqrestore(&hw->fifo_lock, flags); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 104 | |
| 105 | return ret; |
| 106 | } |
| 107 | |
David Altobelli | 4a35147 | 2009-08-17 17:08:01 -0600 | [diff] [blame] | 108 | static int fifo_check_recv(struct ilo_hwinfo *hw, char *fifobar) |
| 109 | { |
| 110 | struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar); |
| 111 | unsigned long flags; |
| 112 | int ret = 0; |
| 113 | u64 c; |
| 114 | |
| 115 | spin_lock_irqsave(&hw->fifo_lock, flags); |
| 116 | c = fifo_q->fifobar[fifo_q->head & fifo_q->imask]; |
| 117 | if (c & ENTRY_MASK_C) |
| 118 | ret = 1; |
| 119 | spin_unlock_irqrestore(&hw->fifo_lock, flags); |
| 120 | |
| 121 | return ret; |
| 122 | } |
| 123 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 124 | static int ilo_pkt_enqueue(struct ilo_hwinfo *hw, struct ccb *ccb, |
| 125 | int dir, int id, int len) |
| 126 | { |
| 127 | char *fifobar; |
| 128 | int entry; |
| 129 | |
| 130 | if (dir == SENDQ) |
| 131 | fifobar = ccb->ccb_u1.send_fifobar; |
| 132 | else |
| 133 | fifobar = ccb->ccb_u3.recv_fifobar; |
| 134 | |
| 135 | entry = mk_entry(id, len); |
| 136 | return fifo_enqueue(hw, fifobar, entry); |
| 137 | } |
| 138 | |
| 139 | static int ilo_pkt_dequeue(struct ilo_hwinfo *hw, struct ccb *ccb, |
| 140 | int dir, int *id, int *len, void **pkt) |
| 141 | { |
| 142 | char *fifobar, *desc; |
| 143 | int entry = 0, pkt_id = 0; |
| 144 | int ret; |
| 145 | |
| 146 | if (dir == SENDQ) { |
| 147 | fifobar = ccb->ccb_u1.send_fifobar; |
| 148 | desc = ccb->ccb_u2.send_desc; |
| 149 | } else { |
| 150 | fifobar = ccb->ccb_u3.recv_fifobar; |
| 151 | desc = ccb->ccb_u4.recv_desc; |
| 152 | } |
| 153 | |
| 154 | ret = fifo_dequeue(hw, fifobar, &entry); |
| 155 | if (ret) { |
| 156 | pkt_id = get_entry_id(entry); |
| 157 | if (id) |
| 158 | *id = pkt_id; |
| 159 | if (len) |
| 160 | *len = get_entry_len(entry); |
| 161 | if (pkt) |
| 162 | *pkt = (void *)(desc + desc_mem_sz(pkt_id)); |
| 163 | } |
| 164 | |
| 165 | return ret; |
| 166 | } |
| 167 | |
David Altobelli | 4a35147 | 2009-08-17 17:08:01 -0600 | [diff] [blame] | 168 | static int ilo_pkt_recv(struct ilo_hwinfo *hw, struct ccb *ccb) |
| 169 | { |
| 170 | char *fifobar = ccb->ccb_u3.recv_fifobar; |
| 171 | |
| 172 | return fifo_check_recv(hw, fifobar); |
| 173 | } |
| 174 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 175 | static inline void doorbell_set(struct ccb *ccb) |
| 176 | { |
| 177 | iowrite8(1, ccb->ccb_u5.db_base); |
| 178 | } |
| 179 | |
| 180 | static inline void doorbell_clr(struct ccb *ccb) |
| 181 | { |
| 182 | iowrite8(2, ccb->ccb_u5.db_base); |
| 183 | } |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 184 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 185 | static inline int ctrl_set(int l2sz, int idxmask, int desclim) |
| 186 | { |
| 187 | int active = 0, go = 1; |
| 188 | return l2sz << CTRL_BITPOS_L2SZ | |
| 189 | idxmask << CTRL_BITPOS_FIFOINDEXMASK | |
| 190 | desclim << CTRL_BITPOS_DESCLIMIT | |
| 191 | active << CTRL_BITPOS_A | |
| 192 | go << CTRL_BITPOS_G; |
| 193 | } |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 194 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 195 | static void ctrl_setup(struct ccb *ccb, int nr_desc, int l2desc_sz) |
| 196 | { |
| 197 | /* for simplicity, use the same parameters for send and recv ctrls */ |
| 198 | ccb->send_ctrl = ctrl_set(l2desc_sz, nr_desc-1, nr_desc-1); |
| 199 | ccb->recv_ctrl = ctrl_set(l2desc_sz, nr_desc-1, nr_desc-1); |
| 200 | } |
| 201 | |
| 202 | static inline int fifo_sz(int nr_entry) |
| 203 | { |
| 204 | /* size of a fifo is determined by the number of entries it contains */ |
| 205 | return (nr_entry * sizeof(u64)) + FIFOHANDLESIZE; |
| 206 | } |
| 207 | |
| 208 | static void fifo_setup(void *base_addr, int nr_entry) |
| 209 | { |
| 210 | struct fifo *fifo_q = base_addr; |
| 211 | int i; |
| 212 | |
| 213 | /* set up an empty fifo */ |
| 214 | fifo_q->head = 0; |
| 215 | fifo_q->tail = 0; |
| 216 | fifo_q->reset = 0; |
| 217 | fifo_q->nrents = nr_entry; |
| 218 | fifo_q->imask = nr_entry - 1; |
| 219 | fifo_q->merge = ENTRY_MASK_O; |
| 220 | |
| 221 | for (i = 0; i < nr_entry; i++) |
| 222 | fifo_q->fifobar[i] = 0; |
| 223 | } |
| 224 | |
| 225 | static void ilo_ccb_close(struct pci_dev *pdev, struct ccb_data *data) |
| 226 | { |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 227 | struct ccb *driver_ccb = &data->driver_ccb; |
| 228 | struct ccb __iomem *device_ccb = data->mapped_ccb; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 229 | int retries; |
| 230 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 231 | /* complicated dance to tell the hw we are stopping */ |
| 232 | doorbell_clr(driver_ccb); |
| 233 | iowrite32(ioread32(&device_ccb->send_ctrl) & ~(1 << CTRL_BITPOS_G), |
| 234 | &device_ccb->send_ctrl); |
| 235 | iowrite32(ioread32(&device_ccb->recv_ctrl) & ~(1 << CTRL_BITPOS_G), |
| 236 | &device_ccb->recv_ctrl); |
| 237 | |
| 238 | /* give iLO some time to process stop request */ |
David Altobelli | c073b2d | 2009-02-04 15:11:58 -0800 | [diff] [blame] | 239 | for (retries = MAX_WAIT; retries > 0; retries--) { |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 240 | doorbell_set(driver_ccb); |
David Altobelli | 891f7d7 | 2009-03-31 15:23:53 -0700 | [diff] [blame] | 241 | udelay(WAIT_TIME); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 242 | if (!(ioread32(&device_ccb->send_ctrl) & (1 << CTRL_BITPOS_A)) |
| 243 | && |
| 244 | !(ioread32(&device_ccb->recv_ctrl) & (1 << CTRL_BITPOS_A))) |
| 245 | break; |
| 246 | } |
| 247 | if (retries == 0) |
| 248 | dev_err(&pdev->dev, "Closing, but controller still active\n"); |
| 249 | |
| 250 | /* clear the hw ccb */ |
| 251 | memset_io(device_ccb, 0, sizeof(struct ccb)); |
| 252 | |
| 253 | /* free resources used to back send/recv queues */ |
| 254 | pci_free_consistent(pdev, data->dma_size, data->dma_va, data->dma_pa); |
| 255 | } |
| 256 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 257 | 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] | 258 | { |
Prarit Bhargava | cdf8afc | 2010-08-09 17:20:27 -0700 | [diff] [blame] | 259 | char *dma_va; |
| 260 | dma_addr_t dma_pa; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 261 | struct ccb *driver_ccb, *ilo_ccb; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 262 | |
| 263 | driver_ccb = &data->driver_ccb; |
| 264 | ilo_ccb = &data->ilo_ccb; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 265 | |
| 266 | data->dma_size = 2 * fifo_sz(NR_QENTRY) + |
| 267 | 2 * desc_mem_sz(NR_QENTRY) + |
| 268 | ILO_START_ALIGN + ILO_CACHE_SZ; |
| 269 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 270 | data->dma_va = pci_alloc_consistent(hw->ilo_dev, data->dma_size, |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 271 | &data->dma_pa); |
| 272 | if (!data->dma_va) |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 273 | return -ENOMEM; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 274 | |
| 275 | dma_va = (char *)data->dma_va; |
Prarit Bhargava | cdf8afc | 2010-08-09 17:20:27 -0700 | [diff] [blame] | 276 | dma_pa = data->dma_pa; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 277 | |
| 278 | memset(dma_va, 0, data->dma_size); |
| 279 | |
| 280 | dma_va = (char *)roundup((unsigned long)dma_va, ILO_START_ALIGN); |
Prarit Bhargava | cdf8afc | 2010-08-09 17:20:27 -0700 | [diff] [blame] | 281 | dma_pa = roundup(dma_pa, ILO_START_ALIGN); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 282 | |
| 283 | /* |
| 284 | * Create two ccb's, one with virt addrs, one with phys addrs. |
| 285 | * Copy the phys addr ccb to device shared mem. |
| 286 | */ |
| 287 | ctrl_setup(driver_ccb, NR_QENTRY, L2_QENTRY_SZ); |
| 288 | ctrl_setup(ilo_ccb, NR_QENTRY, L2_QENTRY_SZ); |
| 289 | |
| 290 | fifo_setup(dma_va, NR_QENTRY); |
| 291 | driver_ccb->ccb_u1.send_fifobar = dma_va + FIFOHANDLESIZE; |
Prarit Bhargava | cdf8afc | 2010-08-09 17:20:27 -0700 | [diff] [blame] | 292 | ilo_ccb->ccb_u1.send_fifobar_pa = dma_pa + FIFOHANDLESIZE; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 293 | dma_va += fifo_sz(NR_QENTRY); |
| 294 | dma_pa += fifo_sz(NR_QENTRY); |
| 295 | |
| 296 | dma_va = (char *)roundup((unsigned long)dma_va, ILO_CACHE_SZ); |
Prarit Bhargava | cdf8afc | 2010-08-09 17:20:27 -0700 | [diff] [blame] | 297 | dma_pa = roundup(dma_pa, ILO_CACHE_SZ); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 298 | |
| 299 | fifo_setup(dma_va, NR_QENTRY); |
| 300 | driver_ccb->ccb_u3.recv_fifobar = dma_va + FIFOHANDLESIZE; |
Prarit Bhargava | cdf8afc | 2010-08-09 17:20:27 -0700 | [diff] [blame] | 301 | ilo_ccb->ccb_u3.recv_fifobar_pa = dma_pa + FIFOHANDLESIZE; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 302 | dma_va += fifo_sz(NR_QENTRY); |
| 303 | dma_pa += fifo_sz(NR_QENTRY); |
| 304 | |
| 305 | driver_ccb->ccb_u2.send_desc = dma_va; |
Prarit Bhargava | cdf8afc | 2010-08-09 17:20:27 -0700 | [diff] [blame] | 306 | ilo_ccb->ccb_u2.send_desc_pa = dma_pa; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 307 | dma_pa += desc_mem_sz(NR_QENTRY); |
| 308 | dma_va += desc_mem_sz(NR_QENTRY); |
| 309 | |
| 310 | driver_ccb->ccb_u4.recv_desc = dma_va; |
Prarit Bhargava | cdf8afc | 2010-08-09 17:20:27 -0700 | [diff] [blame] | 311 | ilo_ccb->ccb_u4.recv_desc_pa = dma_pa; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 312 | |
| 313 | driver_ccb->channel = slot; |
| 314 | ilo_ccb->channel = slot; |
| 315 | |
| 316 | driver_ccb->ccb_u5.db_base = hw->db_vaddr + (slot << L2_DB_SIZE); |
| 317 | ilo_ccb->ccb_u5.db_base = NULL; /* hw ccb's doorbell is not used */ |
| 318 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | static void ilo_ccb_open(struct ilo_hwinfo *hw, struct ccb_data *data, int slot) |
| 323 | { |
| 324 | int pkt_id, pkt_sz; |
| 325 | struct ccb *driver_ccb = &data->driver_ccb; |
| 326 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 327 | /* copy the ccb with physical addrs to device memory */ |
| 328 | data->mapped_ccb = (struct ccb __iomem *) |
| 329 | (hw->ram_vaddr + (slot * ILOHW_CCB_SZ)); |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 330 | memcpy_toio(data->mapped_ccb, &data->ilo_ccb, sizeof(struct ccb)); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 331 | |
| 332 | /* put packets on the send and receive queues */ |
| 333 | pkt_sz = 0; |
| 334 | for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++) { |
| 335 | ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, pkt_sz); |
| 336 | doorbell_set(driver_ccb); |
| 337 | } |
| 338 | |
| 339 | pkt_sz = desc_mem_sz(1); |
| 340 | for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++) |
| 341 | ilo_pkt_enqueue(hw, driver_ccb, RECVQ, pkt_id, pkt_sz); |
| 342 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 343 | /* the ccb is ready to use */ |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 344 | doorbell_clr(driver_ccb); |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | static int ilo_ccb_verify(struct ilo_hwinfo *hw, struct ccb_data *data) |
| 348 | { |
| 349 | int pkt_id, i; |
| 350 | struct ccb *driver_ccb = &data->driver_ccb; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 351 | |
| 352 | /* make sure iLO is really handling requests */ |
David Altobelli | c073b2d | 2009-02-04 15:11:58 -0800 | [diff] [blame] | 353 | for (i = MAX_WAIT; i > 0; i--) { |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 354 | if (ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, NULL, NULL)) |
| 355 | break; |
David Altobelli | 891f7d7 | 2009-03-31 15:23:53 -0700 | [diff] [blame] | 356 | udelay(WAIT_TIME); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 357 | } |
| 358 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 359 | if (i == 0) { |
| 360 | dev_err(&hw->ilo_dev->dev, "Open could not dequeue a packet\n"); |
| 361 | return -EBUSY; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 362 | } |
| 363 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 364 | ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, 0); |
| 365 | doorbell_set(driver_ccb); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 366 | return 0; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 367 | } |
| 368 | |
| 369 | static inline int is_channel_reset(struct ccb *ccb) |
| 370 | { |
| 371 | /* check for this particular channel needing a reset */ |
| 372 | return FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset; |
| 373 | } |
| 374 | |
| 375 | static inline void set_channel_reset(struct ccb *ccb) |
| 376 | { |
| 377 | /* set a flag indicating this channel needs a reset */ |
| 378 | FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset = 1; |
| 379 | } |
| 380 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 381 | static inline int get_device_outbound(struct ilo_hwinfo *hw) |
| 382 | { |
| 383 | return ioread32(&hw->mmio_vaddr[DB_OUT]); |
| 384 | } |
| 385 | |
| 386 | static inline int is_db_reset(int db_out) |
| 387 | { |
| 388 | return db_out & (1 << DB_RESET); |
| 389 | } |
| 390 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 391 | static inline int is_device_reset(struct ilo_hwinfo *hw) |
| 392 | { |
| 393 | /* check for global reset condition */ |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 394 | return is_db_reset(get_device_outbound(hw)); |
| 395 | } |
| 396 | |
| 397 | static inline void clear_pending_db(struct ilo_hwinfo *hw, int clr) |
| 398 | { |
| 399 | iowrite32(clr, &hw->mmio_vaddr[DB_OUT]); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 400 | } |
| 401 | |
| 402 | static inline void clear_device(struct ilo_hwinfo *hw) |
| 403 | { |
| 404 | /* clear the device (reset bits, pending channel entries) */ |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 405 | clear_pending_db(hw, -1); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 406 | } |
| 407 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 408 | static inline void ilo_enable_interrupts(struct ilo_hwinfo *hw) |
| 409 | { |
| 410 | iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) | 1, &hw->mmio_vaddr[DB_IRQ]); |
| 411 | } |
| 412 | |
| 413 | static inline void ilo_disable_interrupts(struct ilo_hwinfo *hw) |
| 414 | { |
| 415 | iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) & ~1, |
| 416 | &hw->mmio_vaddr[DB_IRQ]); |
| 417 | } |
| 418 | |
| 419 | static void ilo_set_reset(struct ilo_hwinfo *hw) |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 420 | { |
| 421 | int slot; |
| 422 | |
| 423 | /* |
| 424 | * Mapped memory is zeroed on ilo reset, so set a per ccb flag |
| 425 | * to indicate that this ccb needs to be closed and reopened. |
| 426 | */ |
| 427 | for (slot = 0; slot < MAX_CCB; slot++) { |
| 428 | if (!hw->ccb_alloc[slot]) |
| 429 | continue; |
| 430 | set_channel_reset(&hw->ccb_alloc[slot]->driver_ccb); |
| 431 | } |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 432 | } |
| 433 | |
| 434 | static ssize_t ilo_read(struct file *fp, char __user *buf, |
| 435 | size_t len, loff_t *off) |
| 436 | { |
| 437 | int err, found, cnt, pkt_id, pkt_len; |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 438 | struct ccb_data *data = fp->private_data; |
| 439 | struct ccb *driver_ccb = &data->driver_ccb; |
| 440 | struct ilo_hwinfo *hw = data->ilo_hw; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 441 | void *pkt; |
| 442 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 443 | if (is_channel_reset(driver_ccb)) { |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 444 | /* |
| 445 | * If the device has been reset, applications |
| 446 | * need to close and reopen all ccbs. |
| 447 | */ |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 448 | return -ENODEV; |
| 449 | } |
| 450 | |
| 451 | /* |
| 452 | * This function is to be called when data is expected |
| 453 | * in the channel, and will return an error if no packet is found |
| 454 | * during the loop below. The sleep/retry logic is to allow |
| 455 | * applications to call read() immediately post write(), |
| 456 | * and give iLO some time to process the sent packet. |
| 457 | */ |
| 458 | cnt = 20; |
| 459 | do { |
| 460 | /* look for a received packet */ |
| 461 | found = ilo_pkt_dequeue(hw, driver_ccb, RECVQ, &pkt_id, |
| 462 | &pkt_len, &pkt); |
| 463 | if (found) |
| 464 | break; |
| 465 | cnt--; |
| 466 | msleep(100); |
| 467 | } while (!found && cnt); |
| 468 | |
| 469 | if (!found) |
| 470 | return -EAGAIN; |
| 471 | |
| 472 | /* only copy the length of the received packet */ |
| 473 | if (pkt_len < len) |
| 474 | len = pkt_len; |
| 475 | |
| 476 | err = copy_to_user(buf, pkt, len); |
| 477 | |
| 478 | /* return the received packet to the queue */ |
| 479 | ilo_pkt_enqueue(hw, driver_ccb, RECVQ, pkt_id, desc_mem_sz(1)); |
| 480 | |
| 481 | return err ? -EFAULT : len; |
| 482 | } |
| 483 | |
| 484 | static ssize_t ilo_write(struct file *fp, const char __user *buf, |
| 485 | size_t len, loff_t *off) |
| 486 | { |
| 487 | int err, pkt_id, pkt_len; |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 488 | struct ccb_data *data = fp->private_data; |
| 489 | struct ccb *driver_ccb = &data->driver_ccb; |
| 490 | struct ilo_hwinfo *hw = data->ilo_hw; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 491 | void *pkt; |
| 492 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 493 | if (is_channel_reset(driver_ccb)) |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 494 | return -ENODEV; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 495 | |
| 496 | /* get a packet to send the user command */ |
| 497 | if (!ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, &pkt_len, &pkt)) |
| 498 | return -EBUSY; |
| 499 | |
| 500 | /* limit the length to the length of the packet */ |
| 501 | if (pkt_len < len) |
| 502 | len = pkt_len; |
| 503 | |
| 504 | /* on failure, set the len to 0 to return empty packet to the device */ |
| 505 | err = copy_from_user(pkt, buf, len); |
| 506 | if (err) |
| 507 | len = 0; |
| 508 | |
| 509 | /* send the packet */ |
| 510 | ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, len); |
| 511 | doorbell_set(driver_ccb); |
| 512 | |
| 513 | return err ? -EFAULT : len; |
| 514 | } |
| 515 | |
David Altobelli | 4a35147 | 2009-08-17 17:08:01 -0600 | [diff] [blame] | 516 | static unsigned int ilo_poll(struct file *fp, poll_table *wait) |
| 517 | { |
| 518 | struct ccb_data *data = fp->private_data; |
| 519 | struct ccb *driver_ccb = &data->driver_ccb; |
| 520 | |
| 521 | poll_wait(fp, &data->ccb_waitq, wait); |
| 522 | |
| 523 | if (is_channel_reset(driver_ccb)) |
| 524 | return POLLERR; |
| 525 | else if (ilo_pkt_recv(data->ilo_hw, driver_ccb)) |
| 526 | return POLLIN | POLLRDNORM; |
| 527 | |
| 528 | return 0; |
| 529 | } |
| 530 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 531 | static int ilo_close(struct inode *ip, struct file *fp) |
| 532 | { |
| 533 | int slot; |
| 534 | struct ccb_data *data; |
| 535 | struct ilo_hwinfo *hw; |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 536 | unsigned long flags; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 537 | |
| 538 | slot = iminor(ip) % MAX_CCB; |
| 539 | hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev); |
| 540 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 541 | spin_lock(&hw->open_lock); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 542 | |
| 543 | if (hw->ccb_alloc[slot]->ccb_cnt == 1) { |
| 544 | |
| 545 | data = fp->private_data; |
| 546 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 547 | spin_lock_irqsave(&hw->alloc_lock, flags); |
| 548 | hw->ccb_alloc[slot] = NULL; |
| 549 | spin_unlock_irqrestore(&hw->alloc_lock, flags); |
| 550 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 551 | ilo_ccb_close(hw->ilo_dev, data); |
| 552 | |
| 553 | kfree(data); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 554 | } else |
| 555 | hw->ccb_alloc[slot]->ccb_cnt--; |
| 556 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 557 | spin_unlock(&hw->open_lock); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 558 | |
| 559 | return 0; |
| 560 | } |
| 561 | |
| 562 | static int ilo_open(struct inode *ip, struct file *fp) |
| 563 | { |
| 564 | int slot, error; |
| 565 | struct ccb_data *data; |
| 566 | struct ilo_hwinfo *hw; |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 567 | unsigned long flags; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 568 | |
| 569 | slot = iminor(ip) % MAX_CCB; |
| 570 | hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev); |
| 571 | |
| 572 | /* new ccb allocation */ |
| 573 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
| 574 | if (!data) |
| 575 | return -ENOMEM; |
| 576 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 577 | spin_lock(&hw->open_lock); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 578 | |
| 579 | /* each fd private_data holds sw/hw view of ccb */ |
| 580 | if (hw->ccb_alloc[slot] == NULL) { |
| 581 | /* create a channel control block for this minor */ |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 582 | error = ilo_ccb_setup(hw, data, slot); |
| 583 | if (error) { |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 584 | kfree(data); |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 585 | goto out; |
| 586 | } |
| 587 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 588 | data->ccb_cnt = 1; |
| 589 | data->ccb_excl = fp->f_flags & O_EXCL; |
| 590 | data->ilo_hw = hw; |
| 591 | init_waitqueue_head(&data->ccb_waitq); |
| 592 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 593 | /* write the ccb to hw */ |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 594 | spin_lock_irqsave(&hw->alloc_lock, flags); |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 595 | ilo_ccb_open(hw, data, slot); |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 596 | hw->ccb_alloc[slot] = data; |
| 597 | spin_unlock_irqrestore(&hw->alloc_lock, flags); |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 598 | |
| 599 | /* make sure the channel is functional */ |
| 600 | error = ilo_ccb_verify(hw, data); |
| 601 | if (error) { |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 602 | |
| 603 | spin_lock_irqsave(&hw->alloc_lock, flags); |
| 604 | hw->ccb_alloc[slot] = NULL; |
| 605 | spin_unlock_irqrestore(&hw->alloc_lock, flags); |
| 606 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 607 | ilo_ccb_close(hw->ilo_dev, data); |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 608 | |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 609 | kfree(data); |
| 610 | goto out; |
| 611 | } |
| 612 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 613 | } else { |
| 614 | kfree(data); |
| 615 | if (fp->f_flags & O_EXCL || hw->ccb_alloc[slot]->ccb_excl) { |
| 616 | /* |
| 617 | * The channel exists, and either this open |
| 618 | * or a previous open of this channel wants |
| 619 | * exclusive access. |
| 620 | */ |
| 621 | error = -EBUSY; |
| 622 | } else { |
| 623 | hw->ccb_alloc[slot]->ccb_cnt++; |
| 624 | error = 0; |
| 625 | } |
| 626 | } |
David Altobelli | 66d5e51 | 2009-08-17 17:07:03 -0600 | [diff] [blame] | 627 | out: |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 628 | spin_unlock(&hw->open_lock); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 629 | |
| 630 | if (!error) |
| 631 | fp->private_data = hw->ccb_alloc[slot]; |
| 632 | |
| 633 | return error; |
| 634 | } |
| 635 | |
| 636 | static const struct file_operations ilo_fops = { |
| 637 | .owner = THIS_MODULE, |
| 638 | .read = ilo_read, |
| 639 | .write = ilo_write, |
David Altobelli | 4a35147 | 2009-08-17 17:08:01 -0600 | [diff] [blame] | 640 | .poll = ilo_poll, |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 641 | .open = ilo_open, |
| 642 | .release = ilo_close, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame^] | 643 | .llseek = noop_llseek, |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 644 | }; |
| 645 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 646 | static irqreturn_t ilo_isr(int irq, void *data) |
| 647 | { |
| 648 | struct ilo_hwinfo *hw = data; |
| 649 | int pending, i; |
| 650 | |
| 651 | spin_lock(&hw->alloc_lock); |
| 652 | |
| 653 | /* check for ccbs which have data */ |
| 654 | pending = get_device_outbound(hw); |
| 655 | if (!pending) { |
| 656 | spin_unlock(&hw->alloc_lock); |
| 657 | return IRQ_NONE; |
| 658 | } |
| 659 | |
| 660 | if (is_db_reset(pending)) { |
| 661 | /* wake up all ccbs if the device was reset */ |
| 662 | pending = -1; |
| 663 | ilo_set_reset(hw); |
| 664 | } |
| 665 | |
| 666 | for (i = 0; i < MAX_CCB; i++) { |
| 667 | if (!hw->ccb_alloc[i]) |
| 668 | continue; |
| 669 | if (pending & (1 << i)) |
| 670 | wake_up_interruptible(&hw->ccb_alloc[i]->ccb_waitq); |
| 671 | } |
| 672 | |
| 673 | /* clear the device of the channels that have been handled */ |
| 674 | clear_pending_db(hw, pending); |
| 675 | |
| 676 | spin_unlock(&hw->alloc_lock); |
| 677 | |
| 678 | return IRQ_HANDLED; |
| 679 | } |
| 680 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 681 | static void ilo_unmap_device(struct pci_dev *pdev, struct ilo_hwinfo *hw) |
| 682 | { |
| 683 | pci_iounmap(pdev, hw->db_vaddr); |
| 684 | pci_iounmap(pdev, hw->ram_vaddr); |
| 685 | pci_iounmap(pdev, hw->mmio_vaddr); |
| 686 | } |
| 687 | |
| 688 | static int __devinit ilo_map_device(struct pci_dev *pdev, struct ilo_hwinfo *hw) |
| 689 | { |
| 690 | int error = -ENOMEM; |
| 691 | |
| 692 | /* map the memory mapped i/o registers */ |
| 693 | hw->mmio_vaddr = pci_iomap(pdev, 1, 0); |
| 694 | if (hw->mmio_vaddr == NULL) { |
| 695 | dev_err(&pdev->dev, "Error mapping mmio\n"); |
| 696 | goto out; |
| 697 | } |
| 698 | |
| 699 | /* map the adapter shared memory region */ |
| 700 | hw->ram_vaddr = pci_iomap(pdev, 2, MAX_CCB * ILOHW_CCB_SZ); |
| 701 | if (hw->ram_vaddr == NULL) { |
| 702 | dev_err(&pdev->dev, "Error mapping shared mem\n"); |
| 703 | goto mmio_free; |
| 704 | } |
| 705 | |
| 706 | /* map the doorbell aperture */ |
| 707 | hw->db_vaddr = pci_iomap(pdev, 3, MAX_CCB * ONE_DB_SIZE); |
| 708 | if (hw->db_vaddr == NULL) { |
| 709 | dev_err(&pdev->dev, "Error mapping doorbell\n"); |
| 710 | goto ram_free; |
| 711 | } |
| 712 | |
| 713 | return 0; |
| 714 | ram_free: |
| 715 | pci_iounmap(pdev, hw->ram_vaddr); |
| 716 | mmio_free: |
| 717 | pci_iounmap(pdev, hw->mmio_vaddr); |
| 718 | out: |
| 719 | return error; |
| 720 | } |
| 721 | |
| 722 | static void ilo_remove(struct pci_dev *pdev) |
| 723 | { |
| 724 | int i, minor; |
| 725 | struct ilo_hwinfo *ilo_hw = pci_get_drvdata(pdev); |
| 726 | |
| 727 | clear_device(ilo_hw); |
| 728 | |
| 729 | minor = MINOR(ilo_hw->cdev.dev); |
| 730 | for (i = minor; i < minor + MAX_CCB; i++) |
| 731 | device_destroy(ilo_class, MKDEV(ilo_major, i)); |
| 732 | |
| 733 | cdev_del(&ilo_hw->cdev); |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 734 | ilo_disable_interrupts(ilo_hw); |
| 735 | free_irq(pdev->irq, ilo_hw); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 736 | ilo_unmap_device(pdev, ilo_hw); |
| 737 | pci_release_regions(pdev); |
| 738 | pci_disable_device(pdev); |
| 739 | kfree(ilo_hw); |
| 740 | ilo_hwdev[(minor / MAX_CCB)] = 0; |
| 741 | } |
| 742 | |
| 743 | static int __devinit ilo_probe(struct pci_dev *pdev, |
| 744 | const struct pci_device_id *ent) |
| 745 | { |
| 746 | int devnum, minor, start, error; |
| 747 | struct ilo_hwinfo *ilo_hw; |
| 748 | |
| 749 | /* find a free range for device files */ |
| 750 | for (devnum = 0; devnum < MAX_ILO_DEV; devnum++) { |
| 751 | if (ilo_hwdev[devnum] == 0) { |
| 752 | ilo_hwdev[devnum] = 1; |
| 753 | break; |
| 754 | } |
| 755 | } |
| 756 | |
| 757 | if (devnum == MAX_ILO_DEV) { |
| 758 | dev_err(&pdev->dev, "Error finding free device\n"); |
| 759 | return -ENODEV; |
| 760 | } |
| 761 | |
| 762 | /* track global allocations for this device */ |
| 763 | error = -ENOMEM; |
| 764 | ilo_hw = kzalloc(sizeof(*ilo_hw), GFP_KERNEL); |
| 765 | if (!ilo_hw) |
| 766 | goto out; |
| 767 | |
| 768 | ilo_hw->ilo_dev = pdev; |
| 769 | spin_lock_init(&ilo_hw->alloc_lock); |
| 770 | spin_lock_init(&ilo_hw->fifo_lock); |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 771 | spin_lock_init(&ilo_hw->open_lock); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 772 | |
| 773 | error = pci_enable_device(pdev); |
| 774 | if (error) |
| 775 | goto free; |
| 776 | |
| 777 | pci_set_master(pdev); |
| 778 | |
| 779 | error = pci_request_regions(pdev, ILO_NAME); |
| 780 | if (error) |
| 781 | goto disable; |
| 782 | |
| 783 | error = ilo_map_device(pdev, ilo_hw); |
| 784 | if (error) |
| 785 | goto free_regions; |
| 786 | |
| 787 | pci_set_drvdata(pdev, ilo_hw); |
| 788 | clear_device(ilo_hw); |
| 789 | |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 790 | error = request_irq(pdev->irq, ilo_isr, IRQF_SHARED, "hpilo", ilo_hw); |
| 791 | if (error) |
| 792 | goto unmap; |
| 793 | |
| 794 | ilo_enable_interrupts(ilo_hw); |
| 795 | |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 796 | cdev_init(&ilo_hw->cdev, &ilo_fops); |
| 797 | ilo_hw->cdev.owner = THIS_MODULE; |
| 798 | start = devnum * MAX_CCB; |
| 799 | error = cdev_add(&ilo_hw->cdev, MKDEV(ilo_major, start), MAX_CCB); |
| 800 | if (error) { |
| 801 | dev_err(&pdev->dev, "Could not add cdev\n"); |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 802 | goto remove_isr; |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 803 | } |
| 804 | |
| 805 | for (minor = 0 ; minor < MAX_CCB; minor++) { |
| 806 | struct device *dev; |
| 807 | dev = device_create(ilo_class, &pdev->dev, |
| 808 | MKDEV(ilo_major, minor), NULL, |
| 809 | "hpilo!d%dccb%d", devnum, minor); |
| 810 | if (IS_ERR(dev)) |
| 811 | dev_err(&pdev->dev, "Could not create files\n"); |
| 812 | } |
| 813 | |
| 814 | return 0; |
David Altobelli | 9f70484 | 2009-08-17 17:07:33 -0600 | [diff] [blame] | 815 | remove_isr: |
| 816 | ilo_disable_interrupts(ilo_hw); |
| 817 | free_irq(pdev->irq, ilo_hw); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 818 | unmap: |
| 819 | ilo_unmap_device(pdev, ilo_hw); |
| 820 | free_regions: |
| 821 | pci_release_regions(pdev); |
| 822 | disable: |
| 823 | pci_disable_device(pdev); |
| 824 | free: |
| 825 | kfree(ilo_hw); |
| 826 | out: |
| 827 | ilo_hwdev[devnum] = 0; |
| 828 | return error; |
| 829 | } |
| 830 | |
| 831 | static struct pci_device_id ilo_devices[] = { |
| 832 | { PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xB204) }, |
David Altobelli | 31d8b56 | 2009-02-27 14:03:09 -0800 | [diff] [blame] | 833 | { PCI_DEVICE(PCI_VENDOR_ID_HP, 0x3307) }, |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 834 | { } |
| 835 | }; |
| 836 | MODULE_DEVICE_TABLE(pci, ilo_devices); |
| 837 | |
| 838 | static struct pci_driver ilo_driver = { |
| 839 | .name = ILO_NAME, |
| 840 | .id_table = ilo_devices, |
| 841 | .probe = ilo_probe, |
| 842 | .remove = __devexit_p(ilo_remove), |
| 843 | }; |
| 844 | |
| 845 | static int __init ilo_init(void) |
| 846 | { |
| 847 | int error; |
| 848 | dev_t dev; |
| 849 | |
| 850 | ilo_class = class_create(THIS_MODULE, "iLO"); |
| 851 | if (IS_ERR(ilo_class)) { |
| 852 | error = PTR_ERR(ilo_class); |
| 853 | goto out; |
| 854 | } |
| 855 | |
| 856 | error = alloc_chrdev_region(&dev, 0, MAX_OPEN, ILO_NAME); |
| 857 | if (error) |
| 858 | goto class_destroy; |
| 859 | |
| 860 | ilo_major = MAJOR(dev); |
| 861 | |
| 862 | error = pci_register_driver(&ilo_driver); |
| 863 | if (error) |
| 864 | goto chr_remove; |
| 865 | |
| 866 | return 0; |
| 867 | chr_remove: |
| 868 | unregister_chrdev_region(dev, MAX_OPEN); |
| 869 | class_destroy: |
| 870 | class_destroy(ilo_class); |
| 871 | out: |
| 872 | return error; |
| 873 | } |
| 874 | |
| 875 | static void __exit ilo_exit(void) |
| 876 | { |
| 877 | pci_unregister_driver(&ilo_driver); |
| 878 | unregister_chrdev_region(MKDEV(ilo_major, 0), MAX_OPEN); |
| 879 | class_destroy(ilo_class); |
| 880 | } |
| 881 | |
David Altobelli | 4a35147 | 2009-08-17 17:08:01 -0600 | [diff] [blame] | 882 | MODULE_VERSION("1.2"); |
David Altobelli | 89bcb05 | 2008-07-02 09:38:53 -0600 | [diff] [blame] | 883 | MODULE_ALIAS(ILO_NAME); |
| 884 | MODULE_DESCRIPTION(ILO_NAME); |
| 885 | MODULE_AUTHOR("David Altobelli <david.altobelli@hp.com>"); |
| 886 | MODULE_LICENSE("GPL v2"); |
| 887 | |
| 888 | module_init(ilo_init); |
| 889 | module_exit(ilo_exit); |