| 1,147 → 1,147 |
|---|
| /* |
| * OHCI HCD (Host Controller Driver) for USB. |
| * |
| * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> |
| * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> |
| * |
| * This file is licenced under the GPL. |
| */ |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* |
| * There's basically three types of memory: |
| * - data used only by the HCD ... kmalloc is fine |
| * - async and periodic schedules, shared by HC and HCD ... these |
| * need to use pci_pool or pci_alloc_consistent |
| * - driver buffers, read/written by HC ... the hcd glue or the |
| * device driver provides us with dma addresses |
| * |
| * There's also PCI "register" data, which is memory mapped. |
| * No memory seen by this driver is pagable. |
| */ |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| static struct usb_hcd *ohci_hcd_alloc (void) |
| { |
| struct ohci_hcd *ohci; |
| |
| ohci = (struct ohci_hcd *) kmalloc (sizeof *ohci, GFP_KERNEL); |
| if (ohci != 0) { |
| memset (ohci, 0, sizeof (struct ohci_hcd)); |
| ohci->hcd.product_desc = "OHCI Host Controller"; |
| return &ohci->hcd; |
| } |
| return 0; |
| } |
| |
| static void ohci_hcd_free (struct usb_hcd *hcd) |
| { |
| kfree (hcd_to_ohci (hcd)); |
| } |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| static int ohci_mem_init (struct ohci_hcd *ohci) |
| { |
| ohci->td_cache = pci_pool_create ("ohci_td", ohci->hcd.pdev, |
| sizeof (struct td), |
| 32 /* byte alignment */, |
| 0 /* no page-crossing issues */); |
| if (!ohci->td_cache) |
| return -ENOMEM; |
| ohci->ed_cache = pci_pool_create ("ohci_ed", ohci->hcd.pdev, |
| sizeof (struct ed), |
| 16 /* byte alignment */, |
| 0 /* no page-crossing issues */); |
| if (!ohci->ed_cache) { |
| pci_pool_destroy (ohci->td_cache); |
| return -ENOMEM; |
| } |
| return 0; |
| } |
| |
| static void ohci_mem_cleanup (struct ohci_hcd *ohci) |
| { |
| if (ohci->td_cache) { |
| pci_pool_destroy (ohci->td_cache); |
| ohci->td_cache = 0; |
| } |
| if (ohci->ed_cache) { |
| pci_pool_destroy (ohci->ed_cache); |
| ohci->ed_cache = 0; |
| } |
| } |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* ohci "done list" processing needs this mapping */ |
| static inline struct td * |
| dma_to_td (struct ohci_hcd *hc, dma_addr_t td_dma) |
| { |
| struct td *td; |
| |
| td_dma &= TD_MASK; |
| td = hc->td_hash [TD_HASH_FUNC(td_dma)]; |
| while (td && td->td_dma != td_dma) |
| td = td->td_hash; |
| return td; |
| } |
| |
| /* TDs ... */ |
| static struct td * |
| td_alloc (struct ohci_hcd *hc, int mem_flags) |
| { |
| dma_addr_t dma; |
| struct td *td; |
| |
| td = pci_pool_alloc (hc->td_cache, mem_flags, &dma); |
| if (td) { |
| /* in case hc fetches it, make it look dead */ |
| memset (td, 0, sizeof *td); |
| td->hwNextTD = cpu_to_le32 (dma); |
| td->td_dma = dma; |
| /* hashed in td_fill */ |
| } |
| return td; |
| } |
| |
| static void |
| td_free (struct ohci_hcd *hc, struct td *td) |
| { |
| struct td **prev = &hc->td_hash [TD_HASH_FUNC (td->td_dma)]; |
| |
| while (*prev && *prev != td) |
| prev = &(*prev)->td_hash; |
| if (*prev) |
| *prev = td->td_hash; |
| else if ((td->hwINFO & TD_DONE) != 0) |
| ohci_dbg (hc, "no hash for td %p\n", td); |
| pci_pool_free (hc->td_cache, td, td->td_dma); |
| } |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* EDs ... */ |
| static struct ed * |
| ed_alloc (struct ohci_hcd *hc, int mem_flags) |
| { |
| dma_addr_t dma; |
| struct ed *ed; |
| |
| ed = pci_pool_alloc (hc->ed_cache, mem_flags, &dma); |
| if (ed) { |
| memset (ed, 0, sizeof (*ed)); |
| INIT_LIST_HEAD (&ed->td_list); |
| ed->dma = dma; |
| } |
| return ed; |
| } |
| |
| static void |
| ed_free (struct ohci_hcd *hc, struct ed *ed) |
| { |
| pci_pool_free (hc->ed_cache, ed, ed->dma); |
| } |
| |
| /* |
| * OHCI HCD (Host Controller Driver) for USB. |
| * |
| * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> |
| * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> |
| * |
| * This file is licenced under the GPL. |
| */ |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* |
| * There's basically three types of memory: |
| * - data used only by the HCD ... kmalloc is fine |
| * - async and periodic schedules, shared by HC and HCD ... these |
| * need to use pci_pool or pci_alloc_consistent_usb |
| * - driver buffers, read/written by HC ... the hcd glue or the |
| * device driver provides us with dma addresses |
| * |
| * There's also PCI "register" data, which is memory mapped. |
| * No memory seen by this driver is pagable. |
| */ |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| static struct usb_hcd *ohci_hcd_alloc (void) |
| { |
| struct ohci_hcd *ohci; |
| |
| ohci = (struct ohci_hcd *) kmalloc (sizeof *ohci, GFP_KERNEL); |
| if (ohci != 0) { |
| memset (ohci, 0, sizeof (struct ohci_hcd)); |
| ohci->hcd.product_desc = "OHCI Host Controller"; |
| return &ohci->hcd; |
| } |
| return 0; |
| } |
| |
| static void ohci_hcd_free (struct usb_hcd *hcd) |
| { |
| kfree (hcd_to_ohci (hcd)); |
| } |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| static int ohci_mem_init (struct ohci_hcd *ohci) |
| { |
| ohci->td_cache = pci_pool_create ("ohci_td", ohci->hcd.pdev, |
| sizeof (struct td), |
| 32 /* byte alignment */, |
| 0 /* no page-crossing issues */); |
| if (!ohci->td_cache) |
| return -ENOMEM; |
| ohci->ed_cache = pci_pool_create ("ohci_ed", ohci->hcd.pdev, |
| sizeof (struct ed), |
| 16 /* byte alignment */, |
| 0 /* no page-crossing issues */); |
| if (!ohci->ed_cache) { |
| pci_pool_destroy (ohci->td_cache); |
| return -ENOMEM; |
| } |
| return 0; |
| } |
| |
| static void ohci_mem_cleanup (struct ohci_hcd *ohci) |
| { |
| if (ohci->td_cache) { |
| pci_pool_destroy (ohci->td_cache); |
| ohci->td_cache = 0; |
| } |
| if (ohci->ed_cache) { |
| pci_pool_destroy (ohci->ed_cache); |
| ohci->ed_cache = 0; |
| } |
| } |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* ohci "done list" processing needs this mapping */ |
| static inline struct td * |
| dma_to_td (struct ohci_hcd *hc, dma_addr_t td_dma) |
| { |
| struct td *td; |
| |
| td_dma &= TD_MASK; |
| td = hc->td_hash [TD_HASH_FUNC(td_dma)]; |
| while (td && td->td_dma != td_dma) |
| td = td->td_hash; |
| return td; |
| } |
| |
| /* TDs ... */ |
| static struct td * |
| td_alloc (struct ohci_hcd *hc, int mem_flags) |
| { |
| dma_addr_t dma; |
| struct td *td; |
| |
| td = pci_pool_alloc_usb (hc->td_cache, mem_flags, &dma); |
| if (td) { |
| /* in case hc fetches it, make it look dead */ |
| memset (td, 0, sizeof *td); |
| td->hwNextTD = cpu_to_le32 (dma); |
| td->td_dma = dma; |
| /* hashed in td_fill */ |
| } |
| return td; |
| } |
| |
| static void |
| td_free (struct ohci_hcd *hc, struct td *td) |
| { |
| struct td **prev = &hc->td_hash [TD_HASH_FUNC (td->td_dma)]; |
| |
| while (*prev && *prev != td) |
| prev = &(*prev)->td_hash; |
| if (*prev) |
| *prev = td->td_hash; |
| else if ((td->hwINFO & TD_DONE) != 0) |
| ohci_dbg (hc, "no hash for td %p\n", td); |
| pci_pool_free (hc->td_cache, td, td->td_dma); |
| } |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* EDs ... */ |
| static struct ed * |
| ed_alloc (struct ohci_hcd *hc, int mem_flags) |
| { |
| dma_addr_t dma; |
| struct ed *ed; |
| |
| ed = pci_pool_alloc_usb (hc->ed_cache, mem_flags, &dma); |
| if (ed) { |
| memset (ed, 0, sizeof (*ed)); |
| INIT_LIST_HEAD (&ed->td_list); |
| ed->dma = dma; |
| } |
| return ed; |
| } |
| |
| static void |
| ed_free (struct ohci_hcd *hc, struct ed *ed) |
| { |
| pci_pool_free (hc->ed_cache, ed, ed->dma); |
| } |
| |