diff options
Diffstat (limited to 'drivers/usb/host/xhci-mem.c')
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 204 |
1 files changed, 199 insertions, 5 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 005d446..d34b91a 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -188,12 +188,187 @@ fail: return 0; } +void xhci_free_virt_device(struct xhci_hcd *xhci, int slot_id) +{ + struct xhci_virt_device *dev; + int i; + + /* Slot ID 0 is reserved */ + if (slot_id == 0 || !xhci->devs[slot_id]) + return; + + dev = xhci->devs[slot_id]; + xhci->dcbaa->dev_context_ptrs[2*slot_id] = 0; + xhci->dcbaa->dev_context_ptrs[2*slot_id + 1] = 0; + if (!dev) + return; + + for (i = 0; i < 31; ++i) + if (dev->ep_rings[i]) + xhci_ring_free(xhci, dev->ep_rings[i]); + + if (dev->in_ctx) + dma_pool_free(xhci->device_pool, + dev->in_ctx, dev->in_ctx_dma); + if (dev->out_ctx) + dma_pool_free(xhci->device_pool, + dev->out_ctx, dev->out_ctx_dma); + kfree(xhci->devs[slot_id]); + xhci->devs[slot_id] = 0; +} + +int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id, + struct usb_device *udev, gfp_t flags) +{ + dma_addr_t dma; + struct xhci_virt_device *dev; + + /* Slot ID 0 is reserved */ + if (slot_id == 0 || xhci->devs[slot_id]) { + xhci_warn(xhci, "Bad Slot ID %d\n", slot_id); + return 0; + } + + xhci->devs[slot_id] = kzalloc(sizeof(*xhci->devs[slot_id]), flags); + if (!xhci->devs[slot_id]) + return 0; + dev = xhci->devs[slot_id]; + + /* Allocate the (output) device context that will be used in the HC */ + dev->out_ctx = dma_pool_alloc(xhci->device_pool, flags, &dma); + if (!dev->out_ctx) + goto fail; + dev->out_ctx_dma = dma; + xhci_dbg(xhci, "Slot %d output ctx = 0x%x (dma)\n", slot_id, dma); + memset(dev->out_ctx, 0, sizeof(*dev->out_ctx)); + + /* Allocate the (input) device context for address device command */ + dev->in_ctx = dma_pool_alloc(xhci->device_pool, flags, &dma); + if (!dev->in_ctx) + goto fail; + dev->in_ctx_dma = dma; + xhci_dbg(xhci, "Slot %d input ctx = 0x%x (dma)\n", slot_id, dma); + memset(dev->in_ctx, 0, sizeof(*dev->in_ctx)); + + /* Allocate endpoint 0 ring */ + dev->ep_rings[0] = xhci_ring_alloc(xhci, 1, true, flags); + if (!dev->ep_rings[0]) + goto fail; + + /* + * Point to output device context in dcbaa; skip the output control + * context, which is eight 32 bit fields (or 32 bytes long) + */ + xhci->dcbaa->dev_context_ptrs[2*slot_id] = + (u32) dev->out_ctx_dma + (32); + xhci_dbg(xhci, "Set slot id %d dcbaa entry 0x%x to 0x%x\n", + slot_id, + (unsigned int) &xhci->dcbaa->dev_context_ptrs[2*slot_id], + dev->out_ctx_dma); + xhci->dcbaa->dev_context_ptrs[2*slot_id + 1] = 0; + + return 1; +fail: + xhci_free_virt_device(xhci, slot_id); + return 0; +} + +/* Setup an xHCI virtual device for a Set Address command */ +int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *udev) +{ + struct xhci_virt_device *dev; + struct xhci_ep_ctx *ep0_ctx; + struct usb_device *top_dev; + + dev = xhci->devs[udev->slot_id]; + /* Slot ID 0 is reserved */ + if (udev->slot_id == 0 || !dev) { + xhci_warn(xhci, "Slot ID %d is not assigned to this device\n", + udev->slot_id); + return -EINVAL; + } + ep0_ctx = &dev->in_ctx->ep[0]; + + /* 2) New slot context and endpoint 0 context are valid*/ + dev->in_ctx->add_flags = SLOT_FLAG | EP0_FLAG; + + /* 3) Only the control endpoint is valid - one endpoint context */ + dev->in_ctx->slot.dev_info |= LAST_CTX(1); + + switch (udev->speed) { + case USB_SPEED_SUPER: + dev->in_ctx->slot.dev_info |= (u32) udev->route; + dev->in_ctx->slot.dev_info |= (u32) SLOT_SPEED_SS; + break; + case USB_SPEED_HIGH: + dev->in_ctx->slot.dev_info |= (u32) SLOT_SPEED_HS; + break; + case USB_SPEED_FULL: + dev->in_ctx->slot.dev_info |= (u32) SLOT_SPEED_FS; + break; + case USB_SPEED_LOW: + dev->in_ctx->slot.dev_info |= (u32) SLOT_SPEED_LS; + break; + case USB_SPEED_VARIABLE: + xhci_dbg(xhci, "FIXME xHCI doesn't support wireless speeds\n"); + return -EINVAL; + break; + default: + /* Speed was set earlier, this shouldn't happen. */ + BUG(); + } + /* Find the root hub port this device is under */ + for (top_dev = udev; top_dev->parent && top_dev->parent->parent; + top_dev = top_dev->parent) + /* Found device below root hub */; + dev->in_ctx->slot.dev_info2 |= (u32) ROOT_HUB_PORT(top_dev->portnum); + xhci_dbg(xhci, "Set root hub portnum to %d\n", top_dev->portnum); + + /* Is this a LS/FS device under a HS hub? */ + /* + * FIXME: I don't think this is right, where does the TT info for the + * roothub or parent hub come from? + */ + if ((udev->speed == USB_SPEED_LOW || udev->speed == USB_SPEED_FULL) && + udev->tt) { + dev->in_ctx->slot.tt_info = udev->tt->hub->slot_id; + dev->in_ctx->slot.tt_info |= udev->ttport << 8; + } + xhci_dbg(xhci, "udev->tt = 0x%x\n", (unsigned int) udev->tt); + xhci_dbg(xhci, "udev->ttport = 0x%x\n", udev->ttport); + + /* Step 4 - ring already allocated */ + /* Step 5 */ + ep0_ctx->ep_info2 = EP_TYPE(CTRL_EP); + /* + * See section 4.3 bullet 6: + * The default Max Packet size for ep0 is "8 bytes for a USB2 + * LS/FS/HS device or 512 bytes for a USB3 SS device" + * XXX: Not sure about wireless USB devices. + */ + if (udev->speed == USB_SPEED_SUPER) + ep0_ctx->ep_info2 |= MAX_PACKET(512); + else + ep0_ctx->ep_info2 |= MAX_PACKET(8); + /* EP 0 can handle "burst" sizes of 1, so Max Burst Size field is 0 */ + ep0_ctx->ep_info2 |= MAX_BURST(0); + ep0_ctx->ep_info2 |= ERROR_COUNT(3); + + ep0_ctx->deq[0] = + dev->ep_rings[0]->first_seg->dma; + ep0_ctx->deq[0] |= dev->ep_rings[0]->cycle_state; + ep0_ctx->deq[1] = 0; + + /* Steps 7 and 8 were done in xhci_alloc_virt_device() */ + + return 0; +} + void xhci_mem_cleanup(struct xhci_hcd *xhci) { struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); int size; - - /* XXX: Free all the segments in the various rings */ + int i; /* Free the Event Ring Segment Table and the actual Event Ring */ xhci_writel(xhci, 0, &xhci->ir_set->erst_size); @@ -218,16 +393,27 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci) xhci_ring_free(xhci, xhci->cmd_ring); xhci->cmd_ring = NULL; xhci_dbg(xhci, "Freed command ring\n"); + + for (i = 1; i < MAX_HC_SLOTS; ++i) + xhci_free_virt_device(xhci, i); + if (xhci->segment_pool) dma_pool_destroy(xhci->segment_pool); xhci->segment_pool = NULL; xhci_dbg(xhci, "Freed segment pool\n"); + + if (xhci->device_pool) + dma_pool_destroy(xhci->device_pool); + xhci->device_pool = NULL; + xhci_dbg(xhci, "Freed device context pool\n"); + xhci_writel(xhci, 0, &xhci->op_regs->dcbaa_ptr[1]); xhci_writel(xhci, 0, &xhci->op_regs->dcbaa_ptr[0]); if (xhci->dcbaa) pci_free_consistent(pdev, sizeof(*xhci->dcbaa), xhci->dcbaa, xhci->dcbaa->dma); xhci->dcbaa = NULL; + xhci->page_size = 0; xhci->page_shift = 0; } @@ -280,8 +466,8 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags) goto fail; memset(xhci->dcbaa, 0, sizeof *(xhci->dcbaa)); xhci->dcbaa->dma = dma; - xhci_dbg(xhci, "// Setting device context base array address to 0x%x\n", - xhci->dcbaa->dma); + xhci_dbg(xhci, "// Device context base array address = 0x%x (DMA), 0x%x (virt)\n", + xhci->dcbaa->dma, (unsigned int) xhci->dcbaa); xhci_writel(xhci, (u32) 0, &xhci->op_regs->dcbaa_ptr[1]); xhci_writel(xhci, dma, &xhci->op_regs->dcbaa_ptr[0]); @@ -293,7 +479,12 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags) */ xhci->segment_pool = dma_pool_create("xHCI ring segments", dev, SEGMENT_SIZE, 64, xhci->page_size); - if (!xhci->segment_pool) + /* See Table 46 and Note on Figure 55 */ + /* FIXME support 64-byte contexts */ + xhci->device_pool = dma_pool_create("xHCI input/output contexts", dev, + sizeof(struct xhci_device_control), + 64, xhci->page_size); + if (!xhci->segment_pool || !xhci->device_pool) goto fail; /* Set up the command ring to have one segments for now. */ @@ -385,6 +576,9 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags) * something other than the default (~1ms minimum between interrupts). * See section 5.5.1.2. */ + init_completion(&xhci->addr_dev); + for (i = 0; i < MAX_HC_SLOTS; ++i) + xhci->devs[i] = 0; return 0; fail: |
