Release 4.7 drivers/usb/host/ehci-mem.c
/*
* Copyright (c) 2001 by David Brownell
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* this file is part of ehci-hcd.c */
/*-------------------------------------------------------------------------*/
/*
* 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 dma_pool or dma_alloc_coherent
* - driver buffers, read/written by HC ... single shot DMA mapped
*
* There's also "register" data (e.g. PCI or SOC), which is memory mapped.
* No memory seen by this driver is pageable.
*/
/*-------------------------------------------------------------------------*/
/* Allocate the key transfer structures from the previously allocated pool */
static inline void ehci_qtd_init(struct ehci_hcd *ehci, struct ehci_qtd *qtd,
dma_addr_t dma)
{
memset (qtd, 0, sizeof *qtd);
qtd->qtd_dma = dma;
qtd->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT);
qtd->hw_next = EHCI_LIST_END(ehci);
qtd->hw_alt_next = EHCI_LIST_END(ehci);
INIT_LIST_HEAD (&qtd->qtd_list);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david brownell | david brownell | 60 | 81.08% | 3 | 60.00% |
| stefan roese | stefan roese | 11 | 14.86% | 1 | 20.00% |
| anatolij gustschin | anatolij gustschin | 3 | 4.05% | 1 | 20.00% |
| Total | 74 | 100.00% | 5 | 100.00% |
static struct ehci_qtd *ehci_qtd_alloc (struct ehci_hcd *ehci, gfp_t flags)
{
struct ehci_qtd *qtd;
dma_addr_t dma;
qtd = dma_pool_alloc (ehci->qtd_pool, flags, &dma);
if (qtd != NULL) {
ehci_qtd_init(ehci, qtd, dma);
}
return qtd;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| linus torvalds | linus torvalds | 50 | 86.21% | 1 | 14.29% |
| david brownell | david brownell | 3 | 5.17% | 2 | 28.57% |
| stefan roese | stefan roese | 2 | 3.45% | 1 | 14.29% |
| alexey dobriyan | alexey dobriyan | 1 | 1.72% | 1 | 14.29% |
| deepak saxena | deepak saxena | 1 | 1.72% | 1 | 14.29% |
| al viro | al viro | 1 | 1.72% | 1 | 14.29% |
| Total | 58 | 100.00% | 7 | 100.00% |
static inline void ehci_qtd_free (struct ehci_hcd *ehci, struct ehci_qtd *qtd)
{
dma_pool_free (ehci->qtd_pool, qtd, qtd->qtd_dma);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| linus torvalds | linus torvalds | 29 | 96.67% | 1 | 50.00% |
| deepak saxena | deepak saxena | 1 | 3.33% | 1 | 50.00% |
| Total | 30 | 100.00% | 2 | 100.00% |
static void qh_destroy(struct ehci_hcd *ehci, struct ehci_qh *qh)
{
/* clean qtds first, and know this is not linked */
if (!list_empty (&qh->qtd_list) || qh->qh_next.ptr) {
ehci_dbg (ehci, "unused qh not empty!\n");
BUG ();
}
if (qh->dummy)
ehci_qtd_free (ehci, qh->dummy);
dma_pool_free(ehci->qh_pool, qh->hw, qh->qh_dma);
kfree(qh);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| greg kroah-hartman | greg kroah-hartman | 67 | 82.72% | 1 | 25.00% |
| alek du | alek du | 7 | 8.64% | 1 | 25.00% |
| alan stern | alan stern | 5 | 6.17% | 1 | 25.00% |
| david brownell | david brownell | 2 | 2.47% | 1 | 25.00% |
| Total | 81 | 100.00% | 4 | 100.00% |
static struct ehci_qh *ehci_qh_alloc (struct ehci_hcd *ehci, gfp_t flags)
{
struct ehci_qh *qh;
dma_addr_t dma;
qh = kzalloc(sizeof *qh, GFP_ATOMIC);
if (!qh)
goto done;
qh->hw = (struct ehci_qh_hw *)
dma_pool_alloc(ehci->qh_pool, flags, &dma);
if (!qh->hw)
goto fail;
memset(qh->hw, 0, sizeof *qh->hw);
qh->qh_dma = dma;
// INIT_LIST_HEAD (&qh->qh_list);
INIT_LIST_HEAD (&qh->qtd_list);
INIT_LIST_HEAD(&qh->unlink_node);
/* dummy td enables safe urb queuing */
qh->dummy = ehci_qtd_alloc (ehci, flags);
if (qh->dummy == NULL) {
ehci_dbg (ehci, "no dummy td\n");
goto fail1;
}
done:
return qh;
fail1:
dma_pool_free(ehci->qh_pool, qh->hw, qh->qh_dma);
fail:
kfree(qh);
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| linus torvalds | linus torvalds | 72 | 40.91% | 1 | 12.50% |
| alek du | alek du | 50 | 28.41% | 1 | 12.50% |
| david brownell | david brownell | 42 | 23.86% | 2 | 25.00% |
| ming lei | ming lei | 8 | 4.55% | 1 | 12.50% |
| deepak saxena | deepak saxena | 2 | 1.14% | 1 | 12.50% |
| al viro | al viro | 1 | 0.57% | 1 | 12.50% |
| alexey dobriyan | alexey dobriyan | 1 | 0.57% | 1 | 12.50% |
| Total | 176 | 100.00% | 8 | 100.00% |
/*-------------------------------------------------------------------------*/
/* The queue heads and transfer descriptors are managed from pools tied
* to each of the "per device" structures.
* This is the initialisation and cleanup code.
*/
static void ehci_mem_cleanup (struct ehci_hcd *ehci)
{
if (ehci->async)
qh_destroy(ehci, ehci->async);
ehci->async = NULL;
if (ehci->dummy)
qh_destroy(ehci, ehci->dummy);
ehci->dummy = NULL;
/* DMA consistent memory and pools */
dma_pool_destroy(ehci->qtd_pool);
ehci->qtd_pool = NULL;
dma_pool_destroy(ehci->qh_pool);
ehci->qh_pool = NULL;
dma_pool_destroy(ehci->itd_pool);
ehci->itd_pool = NULL;
dma_pool_destroy(ehci->sitd_pool);
ehci->sitd_pool = NULL;
if (ehci->periodic)
dma_free_coherent (ehci_to_hcd(ehci)->self.controller,
ehci->periodic_size * sizeof (u32),
ehci->periodic, ehci->periodic_dma);
ehci->periodic = NULL;
/* shadow periodic table */
kfree(ehci->pshadow);
ehci->pshadow = NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| linus torvalds | linus torvalds | 101 | 62.73% | 1 | 14.29% |
| andiry xu | andiry xu | 18 | 11.18% | 1 | 14.29% |
| david brownell | david brownell | 17 | 10.56% | 1 | 14.29% |
| alan stern | alan stern | 9 | 5.59% | 2 | 28.57% |
| deepak saxena | deepak saxena | 9 | 5.59% | 1 | 14.29% |
| mika kukkonen | mika kukkonen | 7 | 4.35% | 1 | 14.29% |
| Total | 161 | 100.00% | 7 | 100.00% |
/* remember to add cleanup code (above) if you add anything here */
static int ehci_mem_init (struct ehci_hcd *ehci, gfp_t flags)
{
int i;
/* QTDs for control/bulk/intr transfers */
ehci->qtd_pool = dma_pool_create ("ehci_qtd",
ehci_to_hcd(ehci)->self.controller,
sizeof (struct ehci_qtd),
32 /* byte alignment (for hw parts) */,
4096 /* can't cross 4K */);
if (!ehci->qtd_pool) {
goto fail;
}
/* QHs for control/bulk/intr transfers */
ehci->qh_pool = dma_pool_create ("ehci_qh",
ehci_to_hcd(ehci)->self.controller,
sizeof(struct ehci_qh_hw),
32 /* byte alignment (for hw parts) */,
4096 /* can't cross 4K */);
if (!ehci->qh_pool) {
goto fail;
}
ehci->async = ehci_qh_alloc (ehci, flags);
if (!ehci->async) {
goto fail;
}
/* ITD for high speed ISO transfers */
ehci->itd_pool = dma_pool_create ("ehci_itd",
ehci_to_hcd(ehci)->self.controller,
sizeof (struct ehci_itd),
32 /* byte alignment (for hw parts) */,
4096 /* can't cross 4K */);
if (!ehci->itd_pool) {
goto fail;
}
/* SITD for full/low speed split ISO transfers */
ehci->sitd_pool = dma_pool_create ("ehci_sitd",
ehci_to_hcd(ehci)->self.controller,
sizeof (struct ehci_sitd),
32 /* byte alignment (for hw parts) */,
4096 /* can't cross 4K */);
if (!ehci->sitd_pool) {
goto fail;
}
/* Hardware periodic table */
ehci->periodic = (__le32 *)
dma_alloc_coherent (ehci_to_hcd(ehci)->self.controller,
ehci->periodic_size * sizeof(__le32),
&ehci->periodic_dma, flags);
if (ehci->periodic == NULL) {
goto fail;
}
if (ehci->use_dummy_qh) {
struct ehci_qh_hw *hw;
ehci->dummy = ehci_qh_alloc(ehci, flags);
if (!ehci->dummy)
goto fail;
hw = ehci->dummy->hw;
hw->hw_next = EHCI_LIST_END(ehci);
hw->hw_qtd_next = EHCI_LIST_END(ehci);
hw->hw_alt_next = EHCI_LIST_END(ehci);
ehci->dummy->hw = hw;
for (i = 0; i < ehci->periodic_size; i++)
ehci->periodic[i] = cpu_to_hc32(ehci,
ehci->dummy->qh_dma);
} else {
for (i = 0; i < ehci->periodic_size; i++)
ehci->periodic[i] = EHCI_LIST_END(ehci);
}
/* software shadow of hardware table */
ehci->pshadow = kcalloc(ehci->periodic_size, sizeof(void *), flags);
if (ehci->pshadow != NULL)
return 0;
fail:
ehci_dbg (ehci, "couldn't init memory\n");
ehci_mem_cleanup (ehci);
return -ENOMEM;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| linus torvalds | linus torvalds | 236 | 52.33% | 1 | 7.69% |
| andiry xu | andiry xu | 108 | 23.95% | 1 | 7.69% |
| david brownell | david brownell | 53 | 11.75% | 1 | 7.69% |
| deepak saxena | deepak saxena | 21 | 4.66% | 1 | 7.69% |
| alan stern | alan stern | 20 | 4.43% | 2 | 15.38% |
| al viro | al viro | 3 | 0.67% | 2 | 15.38% |
| eric sesterhenn | eric sesterhenn | 3 | 0.67% | 1 | 7.69% |
| stefan roese | stefan roese | 3 | 0.67% | 1 | 7.69% |
| alexey dobriyan | alexey dobriyan | 2 | 0.44% | 1 | 7.69% |
| vladimir zapolskiy | vladimir zapolskiy | 1 | 0.22% | 1 | 7.69% |
| alek du | alek du | 1 | 0.22% | 1 | 7.69% |
| Total | 451 | 100.00% | 13 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| linus torvalds | linus torvalds | 494 | 47.50% | 1 | 4.00% |
| david brownell | david brownell | 179 | 17.21% | 8 | 32.00% |
| andiry xu | andiry xu | 126 | 12.12% | 1 | 4.00% |
| greg kroah-hartman | greg kroah-hartman | 67 | 6.44% | 1 | 4.00% |
| alek du | alek du | 58 | 5.58% | 1 | 4.00% |
| deepak saxena | deepak saxena | 34 | 3.27% | 1 | 4.00% |
| alan stern | alan stern | 34 | 3.27% | 3 | 12.00% |
| stefan roese | stefan roese | 17 | 1.63% | 1 | 4.00% |
| ming lei | ming lei | 8 | 0.77% | 1 | 4.00% |
| mika kukkonen | mika kukkonen | 7 | 0.67% | 1 | 4.00% |
| al viro | al viro | 5 | 0.48% | 2 | 8.00% |
| alexey dobriyan | alexey dobriyan | 4 | 0.38% | 1 | 4.00% |
| anatolij gustschin | anatolij gustschin | 3 | 0.29% | 1 | 4.00% |
| eric sesterhenn | eric sesterhenn | 3 | 0.29% | 1 | 4.00% |
| vladimir zapolskiy | vladimir zapolskiy | 1 | 0.10% | 1 | 4.00% |
| Total | 1040 | 100.00% | 25 | 100.00% |
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