Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 1 | /* |
| 2 | * xHCI host controller driver |
| 3 | * |
| 4 | * Copyright (C) 2008 Intel Corp. |
| 5 | * |
| 6 | * Author: Sarah Sharp |
| 7 | * Some code borrowed from the Linux EHCI driver. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 15 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 16 | * for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software Foundation, |
| 20 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 | */ |
| 22 | |
| 23 | #include <linux/usb.h> |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 24 | #include <linux/pci.h> |
Sarah Sharp | 527c6d7 | 2009-04-29 19:06:56 -0700 | [diff] [blame] | 25 | #include <linux/dmapool.h> |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 26 | |
| 27 | #include "xhci.h" |
| 28 | |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 29 | /* |
| 30 | * Allocates a generic ring segment from the ring pool, sets the dma address, |
| 31 | * initializes the segment to zero, and sets the private next pointer to NULL. |
| 32 | * |
| 33 | * Section 4.11.1.1: |
| 34 | * "All components of all Command and Transfer TRBs shall be initialized to '0'" |
| 35 | */ |
| 36 | static struct xhci_segment *xhci_segment_alloc(struct xhci_hcd *xhci, gfp_t flags) |
| 37 | { |
| 38 | struct xhci_segment *seg; |
| 39 | dma_addr_t dma; |
| 40 | |
| 41 | seg = kzalloc(sizeof *seg, flags); |
| 42 | if (!seg) |
| 43 | return 0; |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 44 | xhci_dbg(xhci, "Allocating priv segment structure at %p\n", seg); |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 45 | |
| 46 | seg->trbs = dma_pool_alloc(xhci->segment_pool, flags, &dma); |
| 47 | if (!seg->trbs) { |
| 48 | kfree(seg); |
| 49 | return 0; |
| 50 | } |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 51 | xhci_dbg(xhci, "// Allocating segment at %p (virtual) 0x%llx (DMA)\n", |
| 52 | seg->trbs, (unsigned long long)dma); |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 53 | |
| 54 | memset(seg->trbs, 0, SEGMENT_SIZE); |
| 55 | seg->dma = dma; |
| 56 | seg->next = NULL; |
| 57 | |
| 58 | return seg; |
| 59 | } |
| 60 | |
| 61 | static void xhci_segment_free(struct xhci_hcd *xhci, struct xhci_segment *seg) |
| 62 | { |
| 63 | if (!seg) |
| 64 | return; |
| 65 | if (seg->trbs) { |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 66 | xhci_dbg(xhci, "Freeing DMA segment at %p (virtual) 0x%llx (DMA)\n", |
| 67 | seg->trbs, (unsigned long long)seg->dma); |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 68 | dma_pool_free(xhci->segment_pool, seg->trbs, seg->dma); |
| 69 | seg->trbs = NULL; |
| 70 | } |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 71 | xhci_dbg(xhci, "Freeing priv segment structure at %p\n", seg); |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 72 | kfree(seg); |
| 73 | } |
| 74 | |
| 75 | /* |
| 76 | * Make the prev segment point to the next segment. |
| 77 | * |
| 78 | * Change the last TRB in the prev segment to be a Link TRB which points to the |
| 79 | * DMA address of the next segment. The caller needs to set any Link TRB |
| 80 | * related flags, such as End TRB, Toggle Cycle, and no snoop. |
| 81 | */ |
| 82 | static void xhci_link_segments(struct xhci_hcd *xhci, struct xhci_segment *prev, |
| 83 | struct xhci_segment *next, bool link_trbs) |
| 84 | { |
| 85 | u32 val; |
| 86 | |
| 87 | if (!prev || !next) |
| 88 | return; |
| 89 | prev->next = next; |
| 90 | if (link_trbs) { |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 91 | prev->trbs[TRBS_PER_SEGMENT-1].link.segment_ptr = next->dma; |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 92 | |
| 93 | /* Set the last TRB in the segment to have a TRB type ID of Link TRB */ |
| 94 | val = prev->trbs[TRBS_PER_SEGMENT-1].link.control; |
| 95 | val &= ~TRB_TYPE_BITMASK; |
| 96 | val |= TRB_TYPE(TRB_LINK); |
| 97 | prev->trbs[TRBS_PER_SEGMENT-1].link.control = val; |
| 98 | } |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 99 | xhci_dbg(xhci, "Linking segment 0x%llx to segment 0x%llx (DMA)\n", |
| 100 | (unsigned long long)prev->dma, |
| 101 | (unsigned long long)next->dma); |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 102 | } |
| 103 | |
| 104 | /* XXX: Do we need the hcd structure in all these functions? */ |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 105 | void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring) |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 106 | { |
| 107 | struct xhci_segment *seg; |
| 108 | struct xhci_segment *first_seg; |
| 109 | |
| 110 | if (!ring || !ring->first_seg) |
| 111 | return; |
| 112 | first_seg = ring->first_seg; |
| 113 | seg = first_seg->next; |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 114 | xhci_dbg(xhci, "Freeing ring at %p\n", ring); |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 115 | while (seg != first_seg) { |
| 116 | struct xhci_segment *next = seg->next; |
| 117 | xhci_segment_free(xhci, seg); |
| 118 | seg = next; |
| 119 | } |
| 120 | xhci_segment_free(xhci, first_seg); |
| 121 | ring->first_seg = NULL; |
| 122 | kfree(ring); |
| 123 | } |
| 124 | |
| 125 | /** |
| 126 | * Create a new ring with zero or more segments. |
| 127 | * |
| 128 | * Link each segment together into a ring. |
| 129 | * Set the end flag and the cycle toggle bit on the last segment. |
| 130 | * See section 4.9.1 and figures 15 and 16. |
| 131 | */ |
| 132 | static struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci, |
| 133 | unsigned int num_segs, bool link_trbs, gfp_t flags) |
| 134 | { |
| 135 | struct xhci_ring *ring; |
| 136 | struct xhci_segment *prev; |
| 137 | |
| 138 | ring = kzalloc(sizeof *(ring), flags); |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 139 | xhci_dbg(xhci, "Allocating ring at %p\n", ring); |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 140 | if (!ring) |
| 141 | return 0; |
| 142 | |
Sarah Sharp | d0e96f5 | 2009-04-27 19:58:01 -0700 | [diff] [blame] | 143 | INIT_LIST_HEAD(&ring->td_list); |
Sarah Sharp | ae63674 | 2009-04-29 19:02:31 -0700 | [diff] [blame] | 144 | INIT_LIST_HEAD(&ring->cancelled_td_list); |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 145 | if (num_segs == 0) |
| 146 | return ring; |
| 147 | |
| 148 | ring->first_seg = xhci_segment_alloc(xhci, flags); |
| 149 | if (!ring->first_seg) |
| 150 | goto fail; |
| 151 | num_segs--; |
| 152 | |
| 153 | prev = ring->first_seg; |
| 154 | while (num_segs > 0) { |
| 155 | struct xhci_segment *next; |
| 156 | |
| 157 | next = xhci_segment_alloc(xhci, flags); |
| 158 | if (!next) |
| 159 | goto fail; |
| 160 | xhci_link_segments(xhci, prev, next, link_trbs); |
| 161 | |
| 162 | prev = next; |
| 163 | num_segs--; |
| 164 | } |
| 165 | xhci_link_segments(xhci, prev, ring->first_seg, link_trbs); |
| 166 | |
| 167 | if (link_trbs) { |
| 168 | /* See section 4.9.2.1 and 6.4.4.1 */ |
| 169 | prev->trbs[TRBS_PER_SEGMENT-1].link.control |= (LINK_TOGGLE); |
| 170 | xhci_dbg(xhci, "Wrote link toggle flag to" |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 171 | " segment %p (virtual), 0x%llx (DMA)\n", |
| 172 | prev, (unsigned long long)prev->dma); |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 173 | } |
| 174 | /* The ring is empty, so the enqueue pointer == dequeue pointer */ |
| 175 | ring->enqueue = ring->first_seg->trbs; |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 176 | ring->enq_seg = ring->first_seg; |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 177 | ring->dequeue = ring->enqueue; |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 178 | ring->deq_seg = ring->first_seg; |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 179 | /* The ring is initialized to 0. The producer must write 1 to the cycle |
| 180 | * bit to handover ownership of the TRB, so PCS = 1. The consumer must |
| 181 | * compare CCS to the cycle bit to check ownership, so CCS = 1. |
| 182 | */ |
| 183 | ring->cycle_state = 1; |
| 184 | |
| 185 | return ring; |
| 186 | |
| 187 | fail: |
| 188 | xhci_ring_free(xhci, ring); |
| 189 | return 0; |
| 190 | } |
| 191 | |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 192 | #define CTX_SIZE(_hcc) (HCC_64BYTE_CONTEXT(_hcc) ? 64 : 32) |
| 193 | |
| 194 | struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci, |
| 195 | int type, gfp_t flags) |
| 196 | { |
| 197 | struct xhci_container_ctx *ctx = kzalloc(sizeof(*ctx), flags); |
| 198 | if (!ctx) |
| 199 | return NULL; |
| 200 | |
| 201 | BUG_ON((type != XHCI_CTX_TYPE_DEVICE) && (type != XHCI_CTX_TYPE_INPUT)); |
| 202 | ctx->type = type; |
| 203 | ctx->size = HCC_64BYTE_CONTEXT(xhci->hcc_params) ? 2048 : 1024; |
| 204 | if (type == XHCI_CTX_TYPE_INPUT) |
| 205 | ctx->size += CTX_SIZE(xhci->hcc_params); |
| 206 | |
| 207 | ctx->bytes = dma_pool_alloc(xhci->device_pool, flags, &ctx->dma); |
| 208 | memset(ctx->bytes, 0, ctx->size); |
| 209 | return ctx; |
| 210 | } |
| 211 | |
| 212 | void xhci_free_container_ctx(struct xhci_hcd *xhci, |
| 213 | struct xhci_container_ctx *ctx) |
| 214 | { |
| 215 | dma_pool_free(xhci->device_pool, ctx->bytes, ctx->dma); |
| 216 | kfree(ctx); |
| 217 | } |
| 218 | |
| 219 | struct xhci_input_control_ctx *xhci_get_input_control_ctx(struct xhci_hcd *xhci, |
| 220 | struct xhci_container_ctx *ctx) |
| 221 | { |
| 222 | BUG_ON(ctx->type != XHCI_CTX_TYPE_INPUT); |
| 223 | return (struct xhci_input_control_ctx *)ctx->bytes; |
| 224 | } |
| 225 | |
| 226 | struct xhci_slot_ctx *xhci_get_slot_ctx(struct xhci_hcd *xhci, |
| 227 | struct xhci_container_ctx *ctx) |
| 228 | { |
| 229 | if (ctx->type == XHCI_CTX_TYPE_DEVICE) |
| 230 | return (struct xhci_slot_ctx *)ctx->bytes; |
| 231 | |
| 232 | return (struct xhci_slot_ctx *) |
| 233 | (ctx->bytes + CTX_SIZE(xhci->hcc_params)); |
| 234 | } |
| 235 | |
| 236 | struct xhci_ep_ctx *xhci_get_ep_ctx(struct xhci_hcd *xhci, |
| 237 | struct xhci_container_ctx *ctx, |
| 238 | unsigned int ep_index) |
| 239 | { |
| 240 | /* increment ep index by offset of start of ep ctx array */ |
| 241 | ep_index++; |
| 242 | if (ctx->type == XHCI_CTX_TYPE_INPUT) |
| 243 | ep_index++; |
| 244 | |
| 245 | return (struct xhci_ep_ctx *) |
| 246 | (ctx->bytes + (ep_index * CTX_SIZE(xhci->hcc_params))); |
| 247 | } |
| 248 | |
Sarah Sharp | d0e96f5 | 2009-04-27 19:58:01 -0700 | [diff] [blame] | 249 | /* All the xhci_tds in the ring's TD list should be freed at this point */ |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 250 | void xhci_free_virt_device(struct xhci_hcd *xhci, int slot_id) |
| 251 | { |
| 252 | struct xhci_virt_device *dev; |
| 253 | int i; |
| 254 | |
| 255 | /* Slot ID 0 is reserved */ |
| 256 | if (slot_id == 0 || !xhci->devs[slot_id]) |
| 257 | return; |
| 258 | |
| 259 | dev = xhci->devs[slot_id]; |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 260 | xhci->dcbaa->dev_context_ptrs[slot_id] = 0; |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 261 | if (!dev) |
| 262 | return; |
| 263 | |
| 264 | for (i = 0; i < 31; ++i) |
| 265 | if (dev->ep_rings[i]) |
| 266 | xhci_ring_free(xhci, dev->ep_rings[i]); |
| 267 | |
| 268 | if (dev->in_ctx) |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 269 | xhci_free_container_ctx(xhci, dev->in_ctx); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 270 | if (dev->out_ctx) |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 271 | xhci_free_container_ctx(xhci, dev->out_ctx); |
| 272 | |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 273 | kfree(xhci->devs[slot_id]); |
| 274 | xhci->devs[slot_id] = 0; |
| 275 | } |
| 276 | |
| 277 | int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id, |
| 278 | struct usb_device *udev, gfp_t flags) |
| 279 | { |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 280 | struct xhci_virt_device *dev; |
| 281 | |
| 282 | /* Slot ID 0 is reserved */ |
| 283 | if (slot_id == 0 || xhci->devs[slot_id]) { |
| 284 | xhci_warn(xhci, "Bad Slot ID %d\n", slot_id); |
| 285 | return 0; |
| 286 | } |
| 287 | |
| 288 | xhci->devs[slot_id] = kzalloc(sizeof(*xhci->devs[slot_id]), flags); |
| 289 | if (!xhci->devs[slot_id]) |
| 290 | return 0; |
| 291 | dev = xhci->devs[slot_id]; |
| 292 | |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 293 | /* Allocate the (output) device context that will be used in the HC. */ |
| 294 | dev->out_ctx = xhci_alloc_container_ctx(xhci, XHCI_CTX_TYPE_DEVICE, flags); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 295 | if (!dev->out_ctx) |
| 296 | goto fail; |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 297 | |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 298 | xhci_dbg(xhci, "Slot %d output ctx = 0x%llx (dma)\n", slot_id, |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 299 | (unsigned long long)dev->out_ctx->dma); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 300 | |
| 301 | /* Allocate the (input) device context for address device command */ |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 302 | dev->in_ctx = xhci_alloc_container_ctx(xhci, XHCI_CTX_TYPE_INPUT, flags); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 303 | if (!dev->in_ctx) |
| 304 | goto fail; |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 305 | |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 306 | xhci_dbg(xhci, "Slot %d input ctx = 0x%llx (dma)\n", slot_id, |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 307 | (unsigned long long)dev->in_ctx->dma); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 308 | |
| 309 | /* Allocate endpoint 0 ring */ |
| 310 | dev->ep_rings[0] = xhci_ring_alloc(xhci, 1, true, flags); |
| 311 | if (!dev->ep_rings[0]) |
| 312 | goto fail; |
| 313 | |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 314 | init_completion(&dev->cmd_completion); |
| 315 | |
Sarah Sharp | 28c2d2e | 2009-07-27 12:05:08 -0700 | [diff] [blame] | 316 | /* Point to output device context in dcbaa. */ |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 317 | xhci->dcbaa->dev_context_ptrs[slot_id] = dev->out_ctx->dma; |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 318 | xhci_dbg(xhci, "Set slot id %d dcbaa entry %p to 0x%llx\n", |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 319 | slot_id, |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 320 | &xhci->dcbaa->dev_context_ptrs[slot_id], |
Sarah Sharp | 28c2d2e | 2009-07-27 12:05:08 -0700 | [diff] [blame] | 321 | (unsigned long long) xhci->dcbaa->dev_context_ptrs[slot_id]); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 322 | |
| 323 | return 1; |
| 324 | fail: |
| 325 | xhci_free_virt_device(xhci, slot_id); |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | /* Setup an xHCI virtual device for a Set Address command */ |
| 330 | int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *udev) |
| 331 | { |
| 332 | struct xhci_virt_device *dev; |
| 333 | struct xhci_ep_ctx *ep0_ctx; |
| 334 | struct usb_device *top_dev; |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 335 | struct xhci_slot_ctx *slot_ctx; |
| 336 | struct xhci_input_control_ctx *ctrl_ctx; |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 337 | |
| 338 | dev = xhci->devs[udev->slot_id]; |
| 339 | /* Slot ID 0 is reserved */ |
| 340 | if (udev->slot_id == 0 || !dev) { |
| 341 | xhci_warn(xhci, "Slot ID %d is not assigned to this device\n", |
| 342 | udev->slot_id); |
| 343 | return -EINVAL; |
| 344 | } |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 345 | ep0_ctx = xhci_get_ep_ctx(xhci, dev->in_ctx, 0); |
| 346 | ctrl_ctx = xhci_get_input_control_ctx(xhci, dev->in_ctx); |
| 347 | slot_ctx = xhci_get_slot_ctx(xhci, dev->in_ctx); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 348 | |
| 349 | /* 2) New slot context and endpoint 0 context are valid*/ |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 350 | ctrl_ctx->add_flags = SLOT_FLAG | EP0_FLAG; |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 351 | |
| 352 | /* 3) Only the control endpoint is valid - one endpoint context */ |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 353 | slot_ctx->dev_info |= LAST_CTX(1); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 354 | |
| 355 | switch (udev->speed) { |
| 356 | case USB_SPEED_SUPER: |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 357 | slot_ctx->dev_info |= (u32) udev->route; |
| 358 | slot_ctx->dev_info |= (u32) SLOT_SPEED_SS; |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 359 | break; |
| 360 | case USB_SPEED_HIGH: |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 361 | slot_ctx->dev_info |= (u32) SLOT_SPEED_HS; |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 362 | break; |
| 363 | case USB_SPEED_FULL: |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 364 | slot_ctx->dev_info |= (u32) SLOT_SPEED_FS; |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 365 | break; |
| 366 | case USB_SPEED_LOW: |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 367 | slot_ctx->dev_info |= (u32) SLOT_SPEED_LS; |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 368 | break; |
| 369 | case USB_SPEED_VARIABLE: |
| 370 | xhci_dbg(xhci, "FIXME xHCI doesn't support wireless speeds\n"); |
| 371 | return -EINVAL; |
| 372 | break; |
| 373 | default: |
| 374 | /* Speed was set earlier, this shouldn't happen. */ |
| 375 | BUG(); |
| 376 | } |
| 377 | /* Find the root hub port this device is under */ |
| 378 | for (top_dev = udev; top_dev->parent && top_dev->parent->parent; |
| 379 | top_dev = top_dev->parent) |
| 380 | /* Found device below root hub */; |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 381 | slot_ctx->dev_info2 |= (u32) ROOT_HUB_PORT(top_dev->portnum); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 382 | xhci_dbg(xhci, "Set root hub portnum to %d\n", top_dev->portnum); |
| 383 | |
| 384 | /* Is this a LS/FS device under a HS hub? */ |
| 385 | /* |
| 386 | * FIXME: I don't think this is right, where does the TT info for the |
| 387 | * roothub or parent hub come from? |
| 388 | */ |
| 389 | if ((udev->speed == USB_SPEED_LOW || udev->speed == USB_SPEED_FULL) && |
| 390 | udev->tt) { |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 391 | slot_ctx->tt_info = udev->tt->hub->slot_id; |
| 392 | slot_ctx->tt_info |= udev->ttport << 8; |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 393 | } |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 394 | xhci_dbg(xhci, "udev->tt = %p\n", udev->tt); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 395 | xhci_dbg(xhci, "udev->ttport = 0x%x\n", udev->ttport); |
| 396 | |
| 397 | /* Step 4 - ring already allocated */ |
| 398 | /* Step 5 */ |
| 399 | ep0_ctx->ep_info2 = EP_TYPE(CTRL_EP); |
| 400 | /* |
| 401 | * See section 4.3 bullet 6: |
| 402 | * The default Max Packet size for ep0 is "8 bytes for a USB2 |
| 403 | * LS/FS/HS device or 512 bytes for a USB3 SS device" |
| 404 | * XXX: Not sure about wireless USB devices. |
| 405 | */ |
| 406 | if (udev->speed == USB_SPEED_SUPER) |
| 407 | ep0_ctx->ep_info2 |= MAX_PACKET(512); |
| 408 | else |
| 409 | ep0_ctx->ep_info2 |= MAX_PACKET(8); |
| 410 | /* EP 0 can handle "burst" sizes of 1, so Max Burst Size field is 0 */ |
| 411 | ep0_ctx->ep_info2 |= MAX_BURST(0); |
| 412 | ep0_ctx->ep_info2 |= ERROR_COUNT(3); |
| 413 | |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 414 | ep0_ctx->deq = |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 415 | dev->ep_rings[0]->first_seg->dma; |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 416 | ep0_ctx->deq |= dev->ep_rings[0]->cycle_state; |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 417 | |
| 418 | /* Steps 7 and 8 were done in xhci_alloc_virt_device() */ |
| 419 | |
| 420 | return 0; |
| 421 | } |
| 422 | |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 423 | /* Return the polling or NAK interval. |
| 424 | * |
| 425 | * The polling interval is expressed in "microframes". If xHCI's Interval field |
| 426 | * is set to N, it will service the endpoint every 2^(Interval)*125us. |
| 427 | * |
| 428 | * The NAK interval is one NAK per 1 to 255 microframes, or no NAKs if interval |
| 429 | * is set to 0. |
| 430 | */ |
| 431 | static inline unsigned int xhci_get_endpoint_interval(struct usb_device *udev, |
| 432 | struct usb_host_endpoint *ep) |
| 433 | { |
| 434 | unsigned int interval = 0; |
| 435 | |
| 436 | switch (udev->speed) { |
| 437 | case USB_SPEED_HIGH: |
| 438 | /* Max NAK rate */ |
| 439 | if (usb_endpoint_xfer_control(&ep->desc) || |
| 440 | usb_endpoint_xfer_bulk(&ep->desc)) |
| 441 | interval = ep->desc.bInterval; |
| 442 | /* Fall through - SS and HS isoc/int have same decoding */ |
| 443 | case USB_SPEED_SUPER: |
| 444 | if (usb_endpoint_xfer_int(&ep->desc) || |
| 445 | usb_endpoint_xfer_isoc(&ep->desc)) { |
| 446 | if (ep->desc.bInterval == 0) |
| 447 | interval = 0; |
| 448 | else |
| 449 | interval = ep->desc.bInterval - 1; |
| 450 | if (interval > 15) |
| 451 | interval = 15; |
| 452 | if (interval != ep->desc.bInterval + 1) |
| 453 | dev_warn(&udev->dev, "ep %#x - rounding interval to %d microframes\n", |
| 454 | ep->desc.bEndpointAddress, 1 << interval); |
| 455 | } |
| 456 | break; |
| 457 | /* Convert bInterval (in 1-255 frames) to microframes and round down to |
| 458 | * nearest power of 2. |
| 459 | */ |
| 460 | case USB_SPEED_FULL: |
| 461 | case USB_SPEED_LOW: |
| 462 | if (usb_endpoint_xfer_int(&ep->desc) || |
| 463 | usb_endpoint_xfer_isoc(&ep->desc)) { |
| 464 | interval = fls(8*ep->desc.bInterval) - 1; |
| 465 | if (interval > 10) |
| 466 | interval = 10; |
| 467 | if (interval < 3) |
| 468 | interval = 3; |
| 469 | if ((1 << interval) != 8*ep->desc.bInterval) |
| 470 | dev_warn(&udev->dev, "ep %#x - rounding interval to %d microframes\n", |
| 471 | ep->desc.bEndpointAddress, 1 << interval); |
| 472 | } |
| 473 | break; |
| 474 | default: |
| 475 | BUG(); |
| 476 | } |
| 477 | return EP_INTERVAL(interval); |
| 478 | } |
| 479 | |
| 480 | static inline u32 xhci_get_endpoint_type(struct usb_device *udev, |
| 481 | struct usb_host_endpoint *ep) |
| 482 | { |
| 483 | int in; |
| 484 | u32 type; |
| 485 | |
| 486 | in = usb_endpoint_dir_in(&ep->desc); |
| 487 | if (usb_endpoint_xfer_control(&ep->desc)) { |
| 488 | type = EP_TYPE(CTRL_EP); |
| 489 | } else if (usb_endpoint_xfer_bulk(&ep->desc)) { |
| 490 | if (in) |
| 491 | type = EP_TYPE(BULK_IN_EP); |
| 492 | else |
| 493 | type = EP_TYPE(BULK_OUT_EP); |
| 494 | } else if (usb_endpoint_xfer_isoc(&ep->desc)) { |
| 495 | if (in) |
| 496 | type = EP_TYPE(ISOC_IN_EP); |
| 497 | else |
| 498 | type = EP_TYPE(ISOC_OUT_EP); |
| 499 | } else if (usb_endpoint_xfer_int(&ep->desc)) { |
| 500 | if (in) |
| 501 | type = EP_TYPE(INT_IN_EP); |
| 502 | else |
| 503 | type = EP_TYPE(INT_OUT_EP); |
| 504 | } else { |
| 505 | BUG(); |
| 506 | } |
| 507 | return type; |
| 508 | } |
| 509 | |
| 510 | int xhci_endpoint_init(struct xhci_hcd *xhci, |
| 511 | struct xhci_virt_device *virt_dev, |
| 512 | struct usb_device *udev, |
Sarah Sharp | f88ba78 | 2009-05-14 11:44:22 -0700 | [diff] [blame] | 513 | struct usb_host_endpoint *ep, |
| 514 | gfp_t mem_flags) |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 515 | { |
| 516 | unsigned int ep_index; |
| 517 | struct xhci_ep_ctx *ep_ctx; |
| 518 | struct xhci_ring *ep_ring; |
| 519 | unsigned int max_packet; |
| 520 | unsigned int max_burst; |
| 521 | |
| 522 | ep_index = xhci_get_endpoint_index(&ep->desc); |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 523 | ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 524 | |
| 525 | /* Set up the endpoint ring */ |
Sarah Sharp | f88ba78 | 2009-05-14 11:44:22 -0700 | [diff] [blame] | 526 | virt_dev->new_ep_rings[ep_index] = xhci_ring_alloc(xhci, 1, true, mem_flags); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 527 | if (!virt_dev->new_ep_rings[ep_index]) |
| 528 | return -ENOMEM; |
| 529 | ep_ring = virt_dev->new_ep_rings[ep_index]; |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 530 | ep_ctx->deq = ep_ring->first_seg->dma | ep_ring->cycle_state; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 531 | |
| 532 | ep_ctx->ep_info = xhci_get_endpoint_interval(udev, ep); |
| 533 | |
| 534 | /* FIXME dig Mult and streams info out of ep companion desc */ |
| 535 | |
Sarah Sharp | 47692d1 | 2009-07-27 12:04:27 -0700 | [diff] [blame] | 536 | /* Allow 3 retries for everything but isoc; |
| 537 | * error count = 0 means infinite retries. |
| 538 | */ |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 539 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
| 540 | ep_ctx->ep_info2 = ERROR_COUNT(3); |
| 541 | else |
Sarah Sharp | 47692d1 | 2009-07-27 12:04:27 -0700 | [diff] [blame] | 542 | ep_ctx->ep_info2 = ERROR_COUNT(1); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 543 | |
| 544 | ep_ctx->ep_info2 |= xhci_get_endpoint_type(udev, ep); |
| 545 | |
| 546 | /* Set the max packet size and max burst */ |
| 547 | switch (udev->speed) { |
| 548 | case USB_SPEED_SUPER: |
| 549 | max_packet = ep->desc.wMaxPacketSize; |
| 550 | ep_ctx->ep_info2 |= MAX_PACKET(max_packet); |
Sarah Sharp | b10de14 | 2009-04-27 19:58:50 -0700 | [diff] [blame] | 551 | /* dig out max burst from ep companion desc */ |
Sarah Sharp | b7d6d99 | 2009-07-27 12:04:38 -0700 | [diff] [blame] | 552 | if (!ep->ss_ep_comp) { |
| 553 | xhci_warn(xhci, "WARN no SS endpoint companion descriptor.\n"); |
| 554 | max_packet = 0; |
| 555 | } else { |
| 556 | max_packet = ep->ss_ep_comp->desc.bMaxBurst; |
| 557 | } |
Sarah Sharp | b10de14 | 2009-04-27 19:58:50 -0700 | [diff] [blame] | 558 | ep_ctx->ep_info2 |= MAX_BURST(max_packet); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 559 | break; |
| 560 | case USB_SPEED_HIGH: |
| 561 | /* bits 11:12 specify the number of additional transaction |
| 562 | * opportunities per microframe (USB 2.0, section 9.6.6) |
| 563 | */ |
| 564 | if (usb_endpoint_xfer_isoc(&ep->desc) || |
| 565 | usb_endpoint_xfer_int(&ep->desc)) { |
| 566 | max_burst = (ep->desc.wMaxPacketSize & 0x1800) >> 11; |
| 567 | ep_ctx->ep_info2 |= MAX_BURST(max_burst); |
| 568 | } |
| 569 | /* Fall through */ |
| 570 | case USB_SPEED_FULL: |
| 571 | case USB_SPEED_LOW: |
| 572 | max_packet = ep->desc.wMaxPacketSize & 0x3ff; |
| 573 | ep_ctx->ep_info2 |= MAX_PACKET(max_packet); |
| 574 | break; |
| 575 | default: |
| 576 | BUG(); |
| 577 | } |
| 578 | /* FIXME Debug endpoint context */ |
| 579 | return 0; |
| 580 | } |
| 581 | |
| 582 | void xhci_endpoint_zero(struct xhci_hcd *xhci, |
| 583 | struct xhci_virt_device *virt_dev, |
| 584 | struct usb_host_endpoint *ep) |
| 585 | { |
| 586 | unsigned int ep_index; |
| 587 | struct xhci_ep_ctx *ep_ctx; |
| 588 | |
| 589 | ep_index = xhci_get_endpoint_index(&ep->desc); |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 590 | ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 591 | |
| 592 | ep_ctx->ep_info = 0; |
| 593 | ep_ctx->ep_info2 = 0; |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 594 | ep_ctx->deq = 0; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 595 | ep_ctx->tx_info = 0; |
| 596 | /* Don't free the endpoint ring until the set interface or configuration |
| 597 | * request succeeds. |
| 598 | */ |
| 599 | } |
| 600 | |
John Youn | 254c80a | 2009-07-27 12:05:03 -0700 | [diff] [blame] | 601 | /* Set up the scratchpad buffer array and scratchpad buffers, if needed. */ |
| 602 | static int scratchpad_alloc(struct xhci_hcd *xhci, gfp_t flags) |
| 603 | { |
| 604 | int i; |
| 605 | struct device *dev = xhci_to_hcd(xhci)->self.controller; |
| 606 | int num_sp = HCS_MAX_SCRATCHPAD(xhci->hcs_params2); |
| 607 | |
| 608 | xhci_dbg(xhci, "Allocating %d scratchpad buffers\n", num_sp); |
| 609 | |
| 610 | if (!num_sp) |
| 611 | return 0; |
| 612 | |
| 613 | xhci->scratchpad = kzalloc(sizeof(*xhci->scratchpad), flags); |
| 614 | if (!xhci->scratchpad) |
| 615 | goto fail_sp; |
| 616 | |
| 617 | xhci->scratchpad->sp_array = |
| 618 | pci_alloc_consistent(to_pci_dev(dev), |
| 619 | num_sp * sizeof(u64), |
| 620 | &xhci->scratchpad->sp_dma); |
| 621 | if (!xhci->scratchpad->sp_array) |
| 622 | goto fail_sp2; |
| 623 | |
| 624 | xhci->scratchpad->sp_buffers = kzalloc(sizeof(void *) * num_sp, flags); |
| 625 | if (!xhci->scratchpad->sp_buffers) |
| 626 | goto fail_sp3; |
| 627 | |
| 628 | xhci->scratchpad->sp_dma_buffers = |
| 629 | kzalloc(sizeof(dma_addr_t) * num_sp, flags); |
| 630 | |
| 631 | if (!xhci->scratchpad->sp_dma_buffers) |
| 632 | goto fail_sp4; |
| 633 | |
| 634 | xhci->dcbaa->dev_context_ptrs[0] = xhci->scratchpad->sp_dma; |
| 635 | for (i = 0; i < num_sp; i++) { |
| 636 | dma_addr_t dma; |
| 637 | void *buf = pci_alloc_consistent(to_pci_dev(dev), |
| 638 | xhci->page_size, &dma); |
| 639 | if (!buf) |
| 640 | goto fail_sp5; |
| 641 | |
| 642 | xhci->scratchpad->sp_array[i] = dma; |
| 643 | xhci->scratchpad->sp_buffers[i] = buf; |
| 644 | xhci->scratchpad->sp_dma_buffers[i] = dma; |
| 645 | } |
| 646 | |
| 647 | return 0; |
| 648 | |
| 649 | fail_sp5: |
| 650 | for (i = i - 1; i >= 0; i--) { |
| 651 | pci_free_consistent(to_pci_dev(dev), xhci->page_size, |
| 652 | xhci->scratchpad->sp_buffers[i], |
| 653 | xhci->scratchpad->sp_dma_buffers[i]); |
| 654 | } |
| 655 | kfree(xhci->scratchpad->sp_dma_buffers); |
| 656 | |
| 657 | fail_sp4: |
| 658 | kfree(xhci->scratchpad->sp_buffers); |
| 659 | |
| 660 | fail_sp3: |
| 661 | pci_free_consistent(to_pci_dev(dev), num_sp * sizeof(u64), |
| 662 | xhci->scratchpad->sp_array, |
| 663 | xhci->scratchpad->sp_dma); |
| 664 | |
| 665 | fail_sp2: |
| 666 | kfree(xhci->scratchpad); |
| 667 | xhci->scratchpad = NULL; |
| 668 | |
| 669 | fail_sp: |
| 670 | return -ENOMEM; |
| 671 | } |
| 672 | |
| 673 | static void scratchpad_free(struct xhci_hcd *xhci) |
| 674 | { |
| 675 | int num_sp; |
| 676 | int i; |
| 677 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); |
| 678 | |
| 679 | if (!xhci->scratchpad) |
| 680 | return; |
| 681 | |
| 682 | num_sp = HCS_MAX_SCRATCHPAD(xhci->hcs_params2); |
| 683 | |
| 684 | for (i = 0; i < num_sp; i++) { |
| 685 | pci_free_consistent(pdev, xhci->page_size, |
| 686 | xhci->scratchpad->sp_buffers[i], |
| 687 | xhci->scratchpad->sp_dma_buffers[i]); |
| 688 | } |
| 689 | kfree(xhci->scratchpad->sp_dma_buffers); |
| 690 | kfree(xhci->scratchpad->sp_buffers); |
| 691 | pci_free_consistent(pdev, num_sp * sizeof(u64), |
| 692 | xhci->scratchpad->sp_array, |
| 693 | xhci->scratchpad->sp_dma); |
| 694 | kfree(xhci->scratchpad); |
| 695 | xhci->scratchpad = NULL; |
| 696 | } |
| 697 | |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 698 | void xhci_mem_cleanup(struct xhci_hcd *xhci) |
| 699 | { |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 700 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); |
| 701 | int size; |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 702 | int i; |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 703 | |
| 704 | /* Free the Event Ring Segment Table and the actual Event Ring */ |
| 705 | xhci_writel(xhci, 0, &xhci->ir_set->erst_size); |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 706 | xhci_write_64(xhci, 0, &xhci->ir_set->erst_base); |
| 707 | xhci_write_64(xhci, 0, &xhci->ir_set->erst_dequeue); |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 708 | size = sizeof(struct xhci_erst_entry)*(xhci->erst.num_entries); |
| 709 | if (xhci->erst.entries) |
| 710 | pci_free_consistent(pdev, size, |
| 711 | xhci->erst.entries, xhci->erst.erst_dma_addr); |
| 712 | xhci->erst.entries = NULL; |
| 713 | xhci_dbg(xhci, "Freed ERST\n"); |
| 714 | if (xhci->event_ring) |
| 715 | xhci_ring_free(xhci, xhci->event_ring); |
| 716 | xhci->event_ring = NULL; |
| 717 | xhci_dbg(xhci, "Freed event ring\n"); |
| 718 | |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 719 | xhci_write_64(xhci, 0, &xhci->op_regs->cmd_ring); |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 720 | if (xhci->cmd_ring) |
| 721 | xhci_ring_free(xhci, xhci->cmd_ring); |
| 722 | xhci->cmd_ring = NULL; |
| 723 | xhci_dbg(xhci, "Freed command ring\n"); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 724 | |
| 725 | for (i = 1; i < MAX_HC_SLOTS; ++i) |
| 726 | xhci_free_virt_device(xhci, i); |
| 727 | |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 728 | if (xhci->segment_pool) |
| 729 | dma_pool_destroy(xhci->segment_pool); |
| 730 | xhci->segment_pool = NULL; |
| 731 | xhci_dbg(xhci, "Freed segment pool\n"); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 732 | |
| 733 | if (xhci->device_pool) |
| 734 | dma_pool_destroy(xhci->device_pool); |
| 735 | xhci->device_pool = NULL; |
| 736 | xhci_dbg(xhci, "Freed device context pool\n"); |
| 737 | |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 738 | xhci_write_64(xhci, 0, &xhci->op_regs->dcbaa_ptr); |
Sarah Sharp | a74588f | 2009-04-27 19:53:42 -0700 | [diff] [blame] | 739 | if (xhci->dcbaa) |
| 740 | pci_free_consistent(pdev, sizeof(*xhci->dcbaa), |
| 741 | xhci->dcbaa, xhci->dcbaa->dma); |
| 742 | xhci->dcbaa = NULL; |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 743 | |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 744 | xhci->page_size = 0; |
| 745 | xhci->page_shift = 0; |
John Youn | 254c80a | 2009-07-27 12:05:03 -0700 | [diff] [blame] | 746 | scratchpad_free(xhci); |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 747 | } |
| 748 | |
| 749 | int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags) |
| 750 | { |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 751 | dma_addr_t dma; |
| 752 | struct device *dev = xhci_to_hcd(xhci)->self.controller; |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 753 | unsigned int val, val2; |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 754 | u64 val_64; |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 755 | struct xhci_segment *seg; |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 756 | u32 page_size; |
| 757 | int i; |
| 758 | |
| 759 | page_size = xhci_readl(xhci, &xhci->op_regs->page_size); |
| 760 | xhci_dbg(xhci, "Supported page size register = 0x%x\n", page_size); |
| 761 | for (i = 0; i < 16; i++) { |
| 762 | if ((0x1 & page_size) != 0) |
| 763 | break; |
| 764 | page_size = page_size >> 1; |
| 765 | } |
| 766 | if (i < 16) |
| 767 | xhci_dbg(xhci, "Supported page size of %iK\n", (1 << (i+12)) / 1024); |
| 768 | else |
| 769 | xhci_warn(xhci, "WARN: no supported page size\n"); |
| 770 | /* Use 4K pages, since that's common and the minimum the HC supports */ |
| 771 | xhci->page_shift = 12; |
| 772 | xhci->page_size = 1 << xhci->page_shift; |
| 773 | xhci_dbg(xhci, "HCD page size set to %iK\n", xhci->page_size / 1024); |
| 774 | |
| 775 | /* |
| 776 | * Program the Number of Device Slots Enabled field in the CONFIG |
| 777 | * register with the max value of slots the HC can handle. |
| 778 | */ |
| 779 | val = HCS_MAX_SLOTS(xhci_readl(xhci, &xhci->cap_regs->hcs_params1)); |
| 780 | xhci_dbg(xhci, "// xHC can handle at most %d device slots.\n", |
| 781 | (unsigned int) val); |
| 782 | val2 = xhci_readl(xhci, &xhci->op_regs->config_reg); |
| 783 | val |= (val2 & ~HCS_SLOTS_MASK); |
| 784 | xhci_dbg(xhci, "// Setting Max device slots reg = 0x%x.\n", |
| 785 | (unsigned int) val); |
| 786 | xhci_writel(xhci, val, &xhci->op_regs->config_reg); |
| 787 | |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 788 | /* |
Sarah Sharp | a74588f | 2009-04-27 19:53:42 -0700 | [diff] [blame] | 789 | * Section 5.4.8 - doorbell array must be |
| 790 | * "physically contiguous and 64-byte (cache line) aligned". |
| 791 | */ |
| 792 | xhci->dcbaa = pci_alloc_consistent(to_pci_dev(dev), |
| 793 | sizeof(*xhci->dcbaa), &dma); |
| 794 | if (!xhci->dcbaa) |
| 795 | goto fail; |
| 796 | memset(xhci->dcbaa, 0, sizeof *(xhci->dcbaa)); |
| 797 | xhci->dcbaa->dma = dma; |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 798 | xhci_dbg(xhci, "// Device context base array address = 0x%llx (DMA), %p (virt)\n", |
| 799 | (unsigned long long)xhci->dcbaa->dma, xhci->dcbaa); |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 800 | xhci_write_64(xhci, dma, &xhci->op_regs->dcbaa_ptr); |
Sarah Sharp | a74588f | 2009-04-27 19:53:42 -0700 | [diff] [blame] | 801 | |
| 802 | /* |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 803 | * Initialize the ring segment pool. The ring must be a contiguous |
| 804 | * structure comprised of TRBs. The TRBs must be 16 byte aligned, |
| 805 | * however, the command ring segment needs 64-byte aligned segments, |
| 806 | * so we pick the greater alignment need. |
| 807 | */ |
| 808 | xhci->segment_pool = dma_pool_create("xHCI ring segments", dev, |
| 809 | SEGMENT_SIZE, 64, xhci->page_size); |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 810 | |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 811 | /* See Table 46 and Note on Figure 55 */ |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 812 | xhci->device_pool = dma_pool_create("xHCI input/output contexts", dev, |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 813 | 2112, 64, xhci->page_size); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 814 | if (!xhci->segment_pool || !xhci->device_pool) |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 815 | goto fail; |
| 816 | |
| 817 | /* Set up the command ring to have one segments for now. */ |
| 818 | xhci->cmd_ring = xhci_ring_alloc(xhci, 1, true, flags); |
| 819 | if (!xhci->cmd_ring) |
| 820 | goto fail; |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 821 | xhci_dbg(xhci, "Allocated command ring at %p\n", xhci->cmd_ring); |
| 822 | xhci_dbg(xhci, "First segment DMA is 0x%llx\n", |
| 823 | (unsigned long long)xhci->cmd_ring->first_seg->dma); |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 824 | |
| 825 | /* Set the address in the Command Ring Control register */ |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 826 | val_64 = xhci_read_64(xhci, &xhci->op_regs->cmd_ring); |
| 827 | val_64 = (val_64 & (u64) CMD_RING_RSVD_BITS) | |
| 828 | (xhci->cmd_ring->first_seg->dma & (u64) ~CMD_RING_RSVD_BITS) | |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 829 | xhci->cmd_ring->cycle_state; |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 830 | xhci_dbg(xhci, "// Setting command ring address to 0x%x\n", val); |
| 831 | xhci_write_64(xhci, val_64, &xhci->op_regs->cmd_ring); |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 832 | xhci_dbg_cmd_ptrs(xhci); |
| 833 | |
| 834 | val = xhci_readl(xhci, &xhci->cap_regs->db_off); |
| 835 | val &= DBOFF_MASK; |
| 836 | xhci_dbg(xhci, "// Doorbell array is located at offset 0x%x" |
| 837 | " from cap regs base addr\n", val); |
| 838 | xhci->dba = (void *) xhci->cap_regs + val; |
| 839 | xhci_dbg_regs(xhci); |
| 840 | xhci_print_run_regs(xhci); |
| 841 | /* Set ir_set to interrupt register set 0 */ |
| 842 | xhci->ir_set = (void *) xhci->run_regs->ir_set; |
| 843 | |
| 844 | /* |
| 845 | * Event ring setup: Allocate a normal ring, but also setup |
| 846 | * the event ring segment table (ERST). Section 4.9.3. |
| 847 | */ |
| 848 | xhci_dbg(xhci, "// Allocating event ring\n"); |
| 849 | xhci->event_ring = xhci_ring_alloc(xhci, ERST_NUM_SEGS, false, flags); |
| 850 | if (!xhci->event_ring) |
| 851 | goto fail; |
| 852 | |
| 853 | xhci->erst.entries = pci_alloc_consistent(to_pci_dev(dev), |
| 854 | sizeof(struct xhci_erst_entry)*ERST_NUM_SEGS, &dma); |
| 855 | if (!xhci->erst.entries) |
| 856 | goto fail; |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 857 | xhci_dbg(xhci, "// Allocated event ring segment table at 0x%llx\n", |
| 858 | (unsigned long long)dma); |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 859 | |
| 860 | memset(xhci->erst.entries, 0, sizeof(struct xhci_erst_entry)*ERST_NUM_SEGS); |
| 861 | xhci->erst.num_entries = ERST_NUM_SEGS; |
| 862 | xhci->erst.erst_dma_addr = dma; |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 863 | xhci_dbg(xhci, "Set ERST to 0; private num segs = %i, virt addr = %p, dma addr = 0x%llx\n", |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 864 | xhci->erst.num_entries, |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 865 | xhci->erst.entries, |
| 866 | (unsigned long long)xhci->erst.erst_dma_addr); |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 867 | |
| 868 | /* set ring base address and size for each segment table entry */ |
| 869 | for (val = 0, seg = xhci->event_ring->first_seg; val < ERST_NUM_SEGS; val++) { |
| 870 | struct xhci_erst_entry *entry = &xhci->erst.entries[val]; |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 871 | entry->seg_addr = seg->dma; |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 872 | entry->seg_size = TRBS_PER_SEGMENT; |
| 873 | entry->rsvd = 0; |
| 874 | seg = seg->next; |
| 875 | } |
| 876 | |
| 877 | /* set ERST count with the number of entries in the segment table */ |
| 878 | val = xhci_readl(xhci, &xhci->ir_set->erst_size); |
| 879 | val &= ERST_SIZE_MASK; |
| 880 | val |= ERST_NUM_SEGS; |
| 881 | xhci_dbg(xhci, "// Write ERST size = %i to ir_set 0 (some bits preserved)\n", |
| 882 | val); |
| 883 | xhci_writel(xhci, val, &xhci->ir_set->erst_size); |
| 884 | |
| 885 | xhci_dbg(xhci, "// Set ERST entries to point to event ring.\n"); |
| 886 | /* set the segment table base address */ |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 887 | xhci_dbg(xhci, "// Set ERST base address for ir_set 0 = 0x%llx\n", |
| 888 | (unsigned long long)xhci->erst.erst_dma_addr); |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 889 | val_64 = xhci_read_64(xhci, &xhci->ir_set->erst_base); |
| 890 | val_64 &= ERST_PTR_MASK; |
| 891 | val_64 |= (xhci->erst.erst_dma_addr & (u64) ~ERST_PTR_MASK); |
| 892 | xhci_write_64(xhci, val_64, &xhci->ir_set->erst_base); |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 893 | |
| 894 | /* Set the event ring dequeue address */ |
Sarah Sharp | 23e3be1 | 2009-04-29 19:05:20 -0700 | [diff] [blame] | 895 | xhci_set_hc_event_deq(xhci); |
Sarah Sharp | 0ebbab3 | 2009-04-27 19:52:34 -0700 | [diff] [blame] | 896 | xhci_dbg(xhci, "Wrote ERST address to ir_set 0.\n"); |
| 897 | xhci_print_ir_set(xhci, xhci->ir_set, 0); |
| 898 | |
| 899 | /* |
| 900 | * XXX: Might need to set the Interrupter Moderation Register to |
| 901 | * something other than the default (~1ms minimum between interrupts). |
| 902 | * See section 5.5.1.2. |
| 903 | */ |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 904 | init_completion(&xhci->addr_dev); |
| 905 | for (i = 0; i < MAX_HC_SLOTS; ++i) |
| 906 | xhci->devs[i] = 0; |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 907 | |
John Youn | 254c80a | 2009-07-27 12:05:03 -0700 | [diff] [blame] | 908 | if (scratchpad_alloc(xhci, flags)) |
| 909 | goto fail; |
| 910 | |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 911 | return 0; |
John Youn | 254c80a | 2009-07-27 12:05:03 -0700 | [diff] [blame] | 912 | |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 913 | fail: |
| 914 | xhci_warn(xhci, "Couldn't initialize memory\n"); |
| 915 | xhci_mem_cleanup(xhci); |
| 916 | return -ENOMEM; |
| 917 | } |