[ewg] [PATCH ofed-1.2-rc3 2/3] ehca: backport for rhel-4.5 - mmap functonality
Stefan Roscher
ossrosch at linux.vnet.ibm.com
Thu May 10 05:41:52 PDT 2007
change ehca module to older mmap functinality due to lack of vm_insert_page()
support in kernel 2.6.9
Signed-off-by: Stefan Roscher <stefan.roscher at de.ibm.com>
---
ehca_classes.h | 29 +++-
ehca_cq.c | 65 +++++++--
ehca_iverbs.h | 10 +
ehca_main.c | 8 -
ehca_qp.c | 78 +++++++++--
ehca_uverbs.c | 395 +++++++++++++++++++++++++++++++++------------------------
6 files changed, 379 insertions(+), 206 deletions(-)
diff -Nurp ofa_kernel-1.2_old/drivers/infiniband/hw/ehca/ehca_classes.h ofa_kernel-1.2_new/drivers/infiniband/hw/ehca/ehca_classes.h
--- ofa_kernel-1.2_old/drivers/infiniband/hw/ehca/ehca_classes.h 2007-05-04 10:38:23.000000000 +0200
+++ ofa_kernel-1.2_new/drivers/infiniband/hw/ehca/ehca_classes.h 2007-05-04 10:40:06.000000000 +0200
@@ -126,14 +126,13 @@ struct ehca_qp {
struct ipz_qp_handle ipz_qp_handle;
struct ehca_pfqp pf;
struct ib_qp_init_attr init_attr;
+ u64 uspace_squeue;
+ u64 uspace_rqueue;
+ u64 uspace_fwh;
struct ehca_cq *send_cq;
struct ehca_cq *recv_cq;
unsigned int sqerr_purgeflag;
struct hlist_node list_entries;
- /* mmap counter for resources mapped into user space */
- u32 mm_count_squeue;
- u32 mm_count_rqueue;
- u32 mm_count_galpa;
};
/* must be power of 2 */
@@ -150,6 +149,8 @@ struct ehca_cq {
struct ipz_cq_handle ipz_cq_handle;
struct ehca_pfcq pf;
spinlock_t cb_lock;
+ u64 uspace_queue;
+ u64 uspace_fwh;
struct hlist_head qp_hashtab[QP_HASHTAB_LEN];
struct list_head entry;
u32 nr_callbacks; /* #events assigned to cpu by scaling code */
@@ -157,9 +158,6 @@ struct ehca_cq {
wait_queue_head_t wait_completion;
spinlock_t task_lock;
u32 ownpid;
- /* mmap counter for resources mapped into user space */
- u32 mm_count_queue;
- u32 mm_count_galpa;
};
enum ehca_mr_flag {
@@ -259,6 +257,20 @@ struct ehca_ucontext {
struct ib_ucontext ib_ucontext;
};
+struct ehca_module *ehca_module_new(void);
+
+int ehca_module_delete(struct ehca_module *me);
+
+int ehca_eq_ctor(struct ehca_eq *eq);
+
+int ehca_eq_dtor(struct ehca_eq *eq);
+
+struct ehca_shca *ehca_shca_new(void);
+
+int ehca_shca_delete(struct ehca_shca *me);
+
+struct ehca_sport *ehca_sport_new(struct ehca_shca *anchor);
+
int ehca_init_pd_cache(void);
void ehca_cleanup_pd_cache(void);
int ehca_init_cq_cache(void);
@@ -282,6 +294,7 @@ extern int ehca_use_hp_mr;
extern int ehca_scaling_code;
struct ipzu_queue_resp {
+ u64 queue; /* points to first queue entry */
u32 qe_size; /* queue entry size */
u32 act_nr_of_sg;
u32 queue_length; /* queue length allocated in bytes */
@@ -294,6 +307,7 @@ struct ehca_create_cq_resp {
u32 cq_number;
u32 token;
struct ipzu_queue_resp ipz_queue;
+ struct h_galpas galpas;
};
struct ehca_create_qp_resp {
@@ -306,6 +320,7 @@ struct ehca_create_qp_resp {
u32 dummy; /* padding for 8 byte alignment */
struct ipzu_queue_resp ipz_squeue;
struct ipzu_queue_resp ipz_rqueue;
+ struct h_galpas galpas;
};
struct ehca_alloc_cq_parms {
diff -Nurp ofa_kernel-1.2_old/drivers/infiniband/hw/ehca/ehca_cq.c ofa_kernel-1.2_new/drivers/infiniband/hw/ehca/ehca_cq.c
--- ofa_kernel-1.2_old/drivers/infiniband/hw/ehca/ehca_cq.c 2007-05-04 10:38:23.000000000 +0200
+++ ofa_kernel-1.2_new/drivers/infiniband/hw/ehca/ehca_cq.c 2007-05-04 10:40:06.000000000 +0200
@@ -268,6 +268,7 @@ struct ib_cq *ehca_create_cq(struct ib_d
if (context) {
struct ipz_queue *ipz_queue = &my_cq->ipz_queue;
struct ehca_create_cq_resp resp;
+ struct vm_area_struct *vma;
memset(&resp, 0, sizeof(resp));
resp.cq_number = my_cq->cq_number;
resp.token = my_cq->token;
@@ -276,14 +277,40 @@ struct ib_cq *ehca_create_cq(struct ib_d
resp.ipz_queue.queue_length = ipz_queue->queue_length;
resp.ipz_queue.pagesize = ipz_queue->pagesize;
resp.ipz_queue.toggle_state = ipz_queue->toggle_state;
+ ret = ehca_mmap_nopage(((u64)(my_cq->token) << 32) | 0x12000000,
+ ipz_queue->queue_length,
+ (void**)&resp.ipz_queue.queue,
+ &vma);
+ if (ret) {
+ ehca_err(device, "Could not mmap queue pages");
+ cq = ERR_PTR(ret);
+ goto create_cq_exit4;
+ }
+ my_cq->uspace_queue = resp.ipz_queue.queue;
+ resp.galpas = my_cq->galpas;
+ ret = ehca_mmap_register(my_cq->galpas.user.fw_handle,
+ (void**)&resp.galpas.kernel.fw_handle,
+ &vma);
+ if (ret) {
+ ehca_err(device, "Could not mmap fw_handle");
+ cq = ERR_PTR(ret);
+ goto create_cq_exit5;
+ }
+ my_cq->uspace_fwh = (u64)resp.galpas.kernel.fw_handle;
if (ib_copy_to_udata(udata, &resp, sizeof(resp))) {
ehca_err(device, "Copy to udata failed.");
- goto create_cq_exit4;
+ goto create_cq_exit6;
}
}
return cq;
+create_cq_exit6:
+ ehca_munmap(my_cq->uspace_fwh, EHCA_PAGESIZE);
+
+create_cq_exit5:
+ ehca_munmap(my_cq->uspace_queue, my_cq->ipz_queue.queue_length);
+
create_cq_exit4:
ipz_queue_dtor(&my_cq->ipz_queue);
@@ -317,6 +344,7 @@ static int get_cq_nr_events(struct ehca_
int ehca_destroy_cq(struct ib_cq *cq)
{
u64 h_ret;
+ int ret;
struct ehca_cq *my_cq = container_of(cq, struct ehca_cq, ib_cq);
int cq_num = my_cq->cq_number;
struct ib_device *device = cq->device;
@@ -326,20 +354,6 @@ int ehca_destroy_cq(struct ib_cq *cq)
u32 cur_pid = current->tgid;
unsigned long flags;
- if (cq->uobject) {
- if (my_cq->mm_count_galpa || my_cq->mm_count_queue) {
- ehca_err(device, "Resources still referenced in "
- "user space cq_num=%x", my_cq->cq_number);
- return -EINVAL;
- }
- if (my_cq->ownpid != cur_pid) {
- ehca_err(device, "Invalid caller pid=%x ownpid=%x "
- "cq_num=%x",
- cur_pid, my_cq->ownpid, my_cq->cq_number);
- return -EINVAL;
- }
- }
-
spin_lock_irqsave(&ehca_cq_idr_lock, flags);
while (my_cq->nr_events) {
spin_unlock_irqrestore(&ehca_cq_idr_lock, flags);
@@ -351,6 +365,25 @@ int ehca_destroy_cq(struct ib_cq *cq)
idr_remove(&ehca_cq_idr, my_cq->token);
spin_unlock_irqrestore(&ehca_cq_idr_lock, flags);
+ if (my_cq->uspace_queue && my_cq->ownpid != cur_pid) {
+ ehca_err(device, "Invalid caller pid=%x ownpid=%x",
+ cur_pid, my_cq->ownpid);
+ return -EINVAL;
+ }
+
+ /* un-mmap if vma alloc */
+ if (my_cq->uspace_queue ) {
+ ret = ehca_munmap(my_cq->uspace_queue,
+ my_cq->ipz_queue.queue_length);
+ if (ret)
+ ehca_err(device, "Could not munmap queue ehca_cq=%p "
+ "cq_num=%x", my_cq, cq_num);
+ ret = ehca_munmap(my_cq->uspace_fwh, EHCA_PAGESIZE);
+ if (ret)
+ ehca_err(device, "Could not munmap fwh ehca_cq=%p "
+ "cq_num=%x", my_cq, cq_num);
+ }
+
h_ret = hipz_h_destroy_cq(adapter_handle, my_cq, 0);
if (h_ret == H_R_STATE) {
/* cq in err: read err data and destroy it forcibly */
@@ -379,7 +412,7 @@ int ehca_resize_cq(struct ib_cq *cq, int
struct ehca_cq *my_cq = container_of(cq, struct ehca_cq, ib_cq);
u32 cur_pid = current->tgid;
- if (cq->uobject && my_cq->ownpid != cur_pid) {
+ if (my_cq->uspace_queue && my_cq->ownpid != cur_pid) {
ehca_err(cq->device, "Invalid caller pid=%x ownpid=%x",
cur_pid, my_cq->ownpid);
return -EINVAL;
diff -Nurp ofa_kernel-1.2_old/drivers/infiniband/hw/ehca/ehca_iverbs.h ofa_kernel-1.2_new/drivers/infiniband/hw/ehca/ehca_iverbs.h
--- ofa_kernel-1.2_old/drivers/infiniband/hw/ehca/ehca_iverbs.h 2007-05-04 10:38:23.000000000 +0200
+++ ofa_kernel-1.2_new/drivers/infiniband/hw/ehca/ehca_iverbs.h 2007-04-29 15:10:56.000000000 +0200
@@ -171,11 +171,19 @@ int ehca_mmap(struct ib_ucontext *contex
void ehca_poll_eqs(unsigned long data);
+int ehca_mmap_nopage(u64 foffset,u64 length,void **mapped,
+ struct vm_area_struct **vma);
+
+int ehca_mmap_register(u64 physical,void **mapped,
+ struct vm_area_struct **vma);
+
+int ehca_munmap(unsigned long addr, size_t len);
+
#ifdef CONFIG_PPC_64K_PAGES
void *ehca_alloc_fw_ctrlblock(gfp_t flags);
void ehca_free_fw_ctrlblock(void *ptr);
#else
-#define ehca_alloc_fw_ctrlblock(flags) ((void*) get_zeroed_page(flags))
+#define ehca_alloc_fw_ctrlblock(flags) ((void *) get_zeroed_page(flags))
#define ehca_free_fw_ctrlblock(ptr) free_page((unsigned long)(ptr))
#endif
diff -Nurp ofa_kernel-1.2_old/drivers/infiniband/hw/ehca/ehca_main.c ofa_kernel-1.2_new/drivers/infiniband/hw/ehca/ehca_main.c
--- ofa_kernel-1.2_old/drivers/infiniband/hw/ehca/ehca_main.c 2007-05-04 10:38:23.000000000 +0200
+++ ofa_kernel-1.2_new/drivers/infiniband/hw/ehca/ehca_main.c 2007-05-04 10:40:06.000000000 +0200
@@ -52,7 +52,7 @@
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Christoph Raisch <raisch at de.ibm.com>");
MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
-MODULE_VERSION("SVNEHCA_0022");
+MODULE_VERSION("SVNEHCA_0019");
int ehca_open_aqp1 = 0;
int ehca_debug_level = 0;
@@ -293,7 +293,7 @@ int ehca_init_device(struct ehca_shca *s
strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
shca->ib_device.owner = THIS_MODULE;
- shca->ib_device.uverbs_abi_ver = 6;
+ shca->ib_device.uverbs_abi_ver = 5;
shca->ib_device.uverbs_cmd_mask =
(1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
(1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
@@ -357,7 +357,7 @@ int ehca_init_device(struct ehca_shca *s
shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
shca->ib_device.attach_mcast = ehca_attach_mcast;
shca->ib_device.detach_mcast = ehca_detach_mcast;
- /* shca->ib_device.process_mad = ehca_process_mad; */
+ /* shca->ib_device.process_mad = ehca_process_mad; */
shca->ib_device.mmap = ehca_mmap;
return ret;
@@ -811,7 +811,7 @@ int __init ehca_module_init(void)
int ret;
printk(KERN_INFO "eHCA Infiniband Device Driver "
- "(Rel.: SVNEHCA_0022)\n");
+ "(Rel.: SVNEHCA_0019)\n");
idr_init(&ehca_qp_idr);
idr_init(&ehca_cq_idr);
spin_lock_init(&ehca_qp_idr_lock);
diff -Nurp ofa_kernel-1.2_old/drivers/infiniband/hw/ehca/ehca_qp.c ofa_kernel-1.2_new/drivers/infiniband/hw/ehca/ehca_qp.c
--- ofa_kernel-1.2_old/drivers/infiniband/hw/ehca/ehca_qp.c 2007-05-04 10:38:23.000000000 +0200
+++ ofa_kernel-1.2_new/drivers/infiniband/hw/ehca/ehca_qp.c 2007-04-29 15:10:56.000000000 +0200
@@ -637,6 +637,7 @@ struct ib_qp *ehca_create_qp(struct ib_p
struct ipz_queue *ipz_rqueue = &my_qp->ipz_rqueue;
struct ipz_queue *ipz_squeue = &my_qp->ipz_squeue;
struct ehca_create_qp_resp resp;
+ struct vm_area_struct * vma;
memset(&resp, 0, sizeof(resp));
resp.qp_num = my_qp->real_qp_num;
@@ -650,21 +651,59 @@ struct ib_qp *ehca_create_qp(struct ib_p
resp.ipz_rqueue.queue_length = ipz_rqueue->queue_length;
resp.ipz_rqueue.pagesize = ipz_rqueue->pagesize;
resp.ipz_rqueue.toggle_state = ipz_rqueue->toggle_state;
+ ret = ehca_mmap_nopage(((u64)(my_qp->token) << 32) | 0x22000000,
+ ipz_rqueue->queue_length,
+ (void**)&resp.ipz_rqueue.queue,
+ &vma);
+ if (ret) {
+ ehca_err(pd->device, "Could not mmap rqueue pages");
+ goto create_qp_exit3;
+ }
+ my_qp->uspace_rqueue = resp.ipz_rqueue.queue;
/* squeue properties */
resp.ipz_squeue.qe_size = ipz_squeue->qe_size;
resp.ipz_squeue.act_nr_of_sg = ipz_squeue->act_nr_of_sg;
resp.ipz_squeue.queue_length = ipz_squeue->queue_length;
resp.ipz_squeue.pagesize = ipz_squeue->pagesize;
resp.ipz_squeue.toggle_state = ipz_squeue->toggle_state;
+ ret = ehca_mmap_nopage(((u64)(my_qp->token) << 32) | 0x23000000,
+ ipz_squeue->queue_length,
+ (void**)&resp.ipz_squeue.queue,
+ &vma);
+ if (ret) {
+ ehca_err(pd->device, "Could not mmap squeue pages");
+ goto create_qp_exit4;
+ }
+ my_qp->uspace_squeue = resp.ipz_squeue.queue;
+ /* fw_handle */
+ resp.galpas = my_qp->galpas;
+ ret = ehca_mmap_register(my_qp->galpas.user.fw_handle,
+ (void**)&resp.galpas.kernel.fw_handle,
+ &vma);
+ if (ret) {
+ ehca_err(pd->device, "Could not mmap fw_handle");
+ goto create_qp_exit5;
+ }
+ my_qp->uspace_fwh = (u64)resp.galpas.kernel.fw_handle;
+
if (ib_copy_to_udata(udata, &resp, sizeof resp)) {
ehca_err(pd->device, "Copy to udata failed");
ret = -EINVAL;
- goto create_qp_exit3;
+ goto create_qp_exit6;
}
}
return &my_qp->ib_qp;
+create_qp_exit6:
+ ehca_munmap(my_qp->uspace_fwh, EHCA_PAGESIZE);
+
+create_qp_exit5:
+ ehca_munmap(my_qp->uspace_squeue, my_qp->ipz_squeue.queue_length);
+
+create_qp_exit4:
+ ehca_munmap(my_qp->uspace_rqueue, my_qp->ipz_rqueue.queue_length);
+
create_qp_exit3:
ipz_queue_dtor(&my_qp->ipz_rqueue);
ipz_queue_dtor(&my_qp->ipz_squeue);
@@ -892,7 +931,7 @@ static int internal_modify_qp(struct ib_
my_qp->qp_type == IB_QPT_SMI) &&
statetrans == IB_QPST_SQE2RTS) {
/* mark next free wqe if kernel */
- if (!ibqp->uobject) {
+ if (my_qp->uspace_squeue == 0) {
struct ehca_wqe *wqe;
/* lock send queue */
spin_lock_irqsave(&my_qp->spinlock_s, spl_flags);
@@ -1378,18 +1417,11 @@ int ehca_destroy_qp(struct ib_qp *ibqp)
enum ib_qp_type qp_type;
unsigned long flags;
- if (ibqp->uobject) {
- if (my_qp->mm_count_galpa ||
- my_qp->mm_count_rqueue || my_qp->mm_count_squeue) {
- ehca_err(ibqp->device, "Resources still referenced in "
- "user space qp_num=%x", ibqp->qp_num);
- return -EINVAL;
- }
- if (my_pd->ownpid != cur_pid) {
- ehca_err(ibqp->device, "Invalid caller pid=%x ownpid=%x",
- cur_pid, my_pd->ownpid);
- return -EINVAL;
- }
+ if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
+ my_pd->ownpid != cur_pid) {
+ ehca_err(ibqp->device, "Invalid caller pid=%x ownpid=%x",
+ cur_pid, my_pd->ownpid);
+ return -EINVAL;
}
if (my_qp->send_cq) {
@@ -1407,6 +1439,24 @@ int ehca_destroy_qp(struct ib_qp *ibqp)
idr_remove(&ehca_qp_idr, my_qp->token);
spin_unlock_irqrestore(&ehca_qp_idr_lock, flags);
+ /* un-mmap if vma alloc */
+ if (my_qp->uspace_rqueue) {
+ ret = ehca_munmap(my_qp->uspace_rqueue,
+ my_qp->ipz_rqueue.queue_length);
+ if (ret)
+ ehca_err(ibqp->device, "Could not munmap rqueue "
+ "qp_num=%x", qp_num);
+ ret = ehca_munmap(my_qp->uspace_squeue,
+ my_qp->ipz_squeue.queue_length);
+ if (ret)
+ ehca_err(ibqp->device, "Could not munmap squeue "
+ "qp_num=%x", qp_num);
+ ret = ehca_munmap(my_qp->uspace_fwh, EHCA_PAGESIZE);
+ if (ret)
+ ehca_err(ibqp->device, "Could not munmap fwh qp_num=%x",
+ qp_num);
+ }
+
h_ret = hipz_h_destroy_qp(shca->ipz_hca_handle, my_qp);
if (h_ret != H_SUCCESS) {
ehca_err(ibqp->device, "hipz_h_destroy_qp() failed rc=%lx "
diff -Nurp ofa_kernel-1.2_old/drivers/infiniband/hw/ehca/ehca_uverbs.c ofa_kernel-1.2_new/drivers/infiniband/hw/ehca/ehca_uverbs.c
--- ofa_kernel-1.2_old/drivers/infiniband/hw/ehca/ehca_uverbs.c 2007-05-04 10:38:23.000000000 +0200
+++ ofa_kernel-1.2_new/drivers/infiniband/hw/ehca/ehca_uverbs.c 2007-04-29 15:10:56.000000000 +0200
@@ -68,183 +68,105 @@ int ehca_dealloc_ucontext(struct ib_ucon
return 0;
}
-static void ehca_mm_open(struct vm_area_struct *vma)
+struct page *ehca_nopage(struct vm_area_struct *vma,
+ unsigned long address, int *type)
{
- u32 *count = (u32*)vma->vm_private_data;
- if (!count) {
- ehca_gen_err("Invalid vma struct vm_start=%lx vm_end=%lx",
- vma->vm_start, vma->vm_end);
- return;
- }
- (*count)++;
- if (!(*count))
- ehca_gen_err("Use count overflow vm_start=%lx vm_end=%lx",
- vma->vm_start, vma->vm_end);
- ehca_gen_dbg("vm_start=%lx vm_end=%lx count=%x",
- vma->vm_start, vma->vm_end, *count);
-}
-
-static void ehca_mm_close(struct vm_area_struct *vma)
-{
- u32 *count = (u32*)vma->vm_private_data;
- if (!count) {
- ehca_gen_err("Invalid vma struct vm_start=%lx vm_end=%lx",
- vma->vm_start, vma->vm_end);
- return;
- }
- (*count)--;
- ehca_gen_dbg("vm_start=%lx vm_end=%lx count=%x",
- vma->vm_start, vma->vm_end, *count);
-}
-
-static struct vm_operations_struct vm_ops = {
- .open = ehca_mm_open,
- .close = ehca_mm_close,
-};
-
-static int ehca_mmap_fw(struct vm_area_struct *vma, struct h_galpas *galpas,
- u32 *mm_count)
-{
- int ret;
- u64 vsize, physical;
-
- vsize = vma->vm_end - vma->vm_start;
- if (vsize != EHCA_PAGESIZE) {
- ehca_gen_err("invalid vsize=%lx", vma->vm_end - vma->vm_start);
- return -EINVAL;
- }
-
- physical = galpas->user.fw_handle;
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
- ehca_gen_dbg("vsize=%lx physical=%lx", vsize, physical);
- /* VM_IO | VM_RESERVED are set by remap_pfn_range() */
- ret = remap_pfn_range(vma, vma->vm_start, physical >> PAGE_SHIFT,
- vsize, vma->vm_page_prot);
- if (unlikely(ret)) {
- ehca_gen_err("remap_pfn_range() failed ret=%x", ret);
- return -ENOMEM;
- }
-
- vma->vm_private_data = mm_count;
- (*mm_count)++;
- vma->vm_ops = &vm_ops;
-
- return 0;
-}
+ struct page *mypage = NULL;
+ u64 fileoffset = vma->vm_pgoff << PAGE_SHIFT;
+ u32 idr_handle = fileoffset >> 32;
+ u32 q_type = (fileoffset >> 28) & 0xF; /* CQ, QP,... */
+ u32 rsrc_type = (fileoffset >> 24) & 0xF; /* sq,rq,cmnd_window */
+ u32 cur_pid = current->tgid;
+ unsigned long flags;
+ struct ehca_cq *cq;
+ struct ehca_qp *qp;
+ struct ehca_pd *pd;
+ u64 offset;
+ void *vaddr;
-static int ehca_mmap_queue(struct vm_area_struct *vma, struct ipz_queue *queue,
- u32 *mm_count)
-{
- int ret;
- u64 start, ofs;
- struct page *page;
+ switch (q_type) {
+ case 1: /* CQ */
+ spin_lock_irqsave(&ehca_cq_idr_lock, flags);
+ cq = idr_find(&ehca_cq_idr, idr_handle);
+ spin_unlock_irqrestore(&ehca_cq_idr_lock, flags);
- vma->vm_flags |= VM_RESERVED;
- start = vma->vm_start;
- for (ofs = 0; ofs < queue->queue_length; ofs += PAGE_SIZE) {
- u64 virt_addr = (u64)ipz_qeit_calc(queue, ofs);
- page = virt_to_page(virt_addr);
- ret = vm_insert_page(vma, start, page);
- if (unlikely(ret)) {
- ehca_gen_err("vm_insert_page() failed rc=%x", ret);
- return ret;
+ /* make sure this mmap really belongs to the authorized user */
+ if (!cq) {
+ ehca_gen_err("cq is NULL ret=NOPAGE_SIGBUS");
+ return NOPAGE_SIGBUS;
}
- start += PAGE_SIZE;
- }
- vma->vm_private_data = mm_count;
- (*mm_count)++;
- vma->vm_ops = &vm_ops;
- return 0;
-}
-
-static int ehca_mmap_cq(struct vm_area_struct *vma, struct ehca_cq *cq,
- u32 rsrc_type)
-{
- int ret;
-
- switch (rsrc_type) {
- case 1: /* galpa fw handle */
- ehca_dbg(cq->ib_cq.device, "cq_num=%x fw", cq->cq_number);
- ret = ehca_mmap_fw(vma, &cq->galpas, &cq->mm_count_galpa);
- if (unlikely(ret)) {
+ if (cq->ownpid != cur_pid) {
ehca_err(cq->ib_cq.device,
- "ehca_mmap_fw() failed rc=%x cq_num=%x",
- ret, cq->cq_number);
- return ret;
+ "Invalid caller pid=%x ownpid=%x",
+ cur_pid, cq->ownpid);
+ return NOPAGE_SIGBUS;
}
- break;
- case 2: /* cq queue_addr */
- ehca_dbg(cq->ib_cq.device, "cq_num=%x queue", cq->cq_number);
- ret = ehca_mmap_queue(vma, &cq->ipz_queue, &cq->mm_count_queue);
- if (unlikely(ret)) {
- ehca_err(cq->ib_cq.device,
- "ehca_mmap_queue() failed rc=%x cq_num=%x",
- ret, cq->cq_number);
- return ret;
+ if (rsrc_type == 2) {
+ ehca_dbg(cq->ib_cq.device, "cq=%p cq queuearea", cq);
+ offset = address - vma->vm_start;
+ vaddr = ipz_qeit_calc(&cq->ipz_queue, offset);
+ ehca_dbg(cq->ib_cq.device, "offset=%lx vaddr=%p",
+ offset, vaddr);
+ mypage = virt_to_page(vaddr);
}
break;
- default:
- ehca_err(cq->ib_cq.device, "bad resource type=%x cq_num=%x",
- rsrc_type, cq->cq_number);
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int ehca_mmap_qp(struct vm_area_struct *vma, struct ehca_qp *qp,
- u32 rsrc_type)
-{
- int ret;
+ case 2: /* QP */
+ spin_lock_irqsave(&ehca_qp_idr_lock, flags);
+ qp = idr_find(&ehca_qp_idr, idr_handle);
+ spin_unlock_irqrestore(&ehca_qp_idr_lock, flags);
- switch (rsrc_type) {
- case 1: /* galpa fw handle */
- ehca_dbg(qp->ib_qp.device, "qp_num=%x fw", qp->ib_qp.qp_num);
- ret = ehca_mmap_fw(vma, &qp->galpas, &qp->mm_count_galpa);
- if (unlikely(ret)) {
- ehca_err(qp->ib_qp.device,
- "remap_pfn_range() failed ret=%x qp_num=%x",
- ret, qp->ib_qp.qp_num);
- return -ENOMEM;
+ /* make sure this mmap really belongs to the authorized user */
+ if (!qp) {
+ ehca_gen_err("qp is NULL ret=NOPAGE_SIGBUS");
+ return NOPAGE_SIGBUS;
}
- break;
- case 2: /* qp rqueue_addr */
- ehca_dbg(qp->ib_qp.device, "qp_num=%x rqueue",
- qp->ib_qp.qp_num);
- ret = ehca_mmap_queue(vma, &qp->ipz_rqueue, &qp->mm_count_rqueue);
- if (unlikely(ret)) {
+ pd = container_of(qp->ib_qp.pd, struct ehca_pd, ib_pd);
+ if (pd->ownpid != cur_pid) {
ehca_err(qp->ib_qp.device,
- "ehca_mmap_queue(rq) failed rc=%x qp_num=%x",
- ret, qp->ib_qp.qp_num);
- return ret;
+ "Invalid caller pid=%x ownpid=%x",
+ cur_pid, pd->ownpid);
+ return NOPAGE_SIGBUS;
}
- break;
- case 3: /* qp squeue_addr */
- ehca_dbg(qp->ib_qp.device, "qp_num=%x squeue",
- qp->ib_qp.qp_num);
- ret = ehca_mmap_queue(vma, &qp->ipz_squeue, &qp->mm_count_squeue);
- if (unlikely(ret)) {
- ehca_err(qp->ib_qp.device,
- "ehca_mmap_queue(sq) failed rc=%x qp_num=%x",
- ret, qp->ib_qp.qp_num);
- return ret;
+ if (rsrc_type == 2) { /* rqueue */
+ ehca_dbg(qp->ib_qp.device, "qp=%p qp rqueuearea", qp);
+ offset = address - vma->vm_start;
+ vaddr = ipz_qeit_calc(&qp->ipz_rqueue, offset);
+ ehca_dbg(qp->ib_qp.device, "offset=%lx vaddr=%p",
+ offset, vaddr);
+ mypage = virt_to_page(vaddr);
+ } else if (rsrc_type == 3) { /* squeue */
+ ehca_dbg(qp->ib_qp.device, "qp=%p qp squeuearea", qp);
+ offset = address - vma->vm_start;
+ vaddr = ipz_qeit_calc(&qp->ipz_squeue, offset);
+ ehca_dbg(qp->ib_qp.device, "offset=%lx vaddr=%p",
+ offset, vaddr);
+ mypage = virt_to_page(vaddr);
}
break;
default:
- ehca_err(qp->ib_qp.device, "bad resource type=%x qp=num=%x",
- rsrc_type, qp->ib_qp.qp_num);
- return -EINVAL;
+ ehca_gen_err("bad queue type %x", q_type);
+ return NOPAGE_SIGBUS;
}
- return 0;
+ if (!mypage) {
+ ehca_gen_err("Invalid page adr==NULL ret=NOPAGE_SIGBUS");
+ return NOPAGE_SIGBUS;
+ }
+ get_page(mypage);
+
+ return mypage;
}
+static struct vm_operations_struct ehcau_vm_ops = {
+ .nopage = ehca_nopage,
+};
+
int ehca_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
{
u64 fileoffset = vma->vm_pgoff << PAGE_SHIFT;
@@ -253,6 +175,7 @@ int ehca_mmap(struct ib_ucontext *contex
u32 rsrc_type = (fileoffset >> 24) & 0xF; /* sq,rq,cmnd_window */
u32 cur_pid = current->tgid;
u32 ret;
+ u64 vsize, physical;
unsigned long flags;
struct ehca_cq *cq;
struct ehca_qp *qp;
@@ -278,12 +201,44 @@ int ehca_mmap(struct ib_ucontext *contex
if (!cq->ib_cq.uobject || cq->ib_cq.uobject->context != context)
return -EINVAL;
- ret = ehca_mmap_cq(vma, cq, rsrc_type);
- if (unlikely(ret)) {
- ehca_err(cq->ib_cq.device,
- "ehca_mmap_cq() failed rc=%x cq_num=%x",
- ret, cq->cq_number);
- return ret;
+ switch (rsrc_type) {
+ case 1: /* galpa fw handle */
+ ehca_dbg(cq->ib_cq.device, "cq=%p cq triggerarea", cq);
+ vma->vm_flags |= VM_RESERVED;
+ vsize = vma->vm_end - vma->vm_start;
+ if (vsize != EHCA_PAGESIZE) {
+ ehca_err(cq->ib_cq.device, "invalid vsize=%lx",
+ vma->vm_end - vma->vm_start);
+ return -EINVAL;
+ }
+
+ physical = cq->galpas.user.fw_handle;
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+ vma->vm_flags |= VM_IO | VM_RESERVED;
+
+ ehca_dbg(cq->ib_cq.device,
+ "vsize=%lx physical=%lx", vsize, physical);
+ ret = remap_pfn_range(vma, vma->vm_start,
+ physical >> PAGE_SHIFT, vsize,
+ vma->vm_page_prot);
+ if (ret) {
+ ehca_err(cq->ib_cq.device,
+ "remap_pfn_range() failed ret=%x",
+ ret);
+ return -ENOMEM;
+ }
+ break;
+
+ case 2: /* cq queue_addr */
+ ehca_dbg(cq->ib_cq.device, "cq=%p cq q_addr", cq);
+ vma->vm_flags |= VM_RESERVED;
+ vma->vm_ops = &ehcau_vm_ops;
+ break;
+
+ default:
+ ehca_err(cq->ib_cq.device, "bad resource type %x",
+ rsrc_type);
+ return -EINVAL;
}
break;
@@ -307,12 +262,50 @@ int ehca_mmap(struct ib_ucontext *contex
if (!qp->ib_qp.uobject || qp->ib_qp.uobject->context != context)
return -EINVAL;
- ret = ehca_mmap_qp(vma, qp, rsrc_type);
- if (unlikely(ret)) {
- ehca_err(qp->ib_qp.device,
- "ehca_mmap_qp() failed rc=%x qp_num=%x",
- ret, qp->ib_qp.qp_num);
- return ret;
+ switch (rsrc_type) {
+ case 1: /* galpa fw handle */
+ ehca_dbg(qp->ib_qp.device, "qp=%p qp triggerarea", qp);
+ vma->vm_flags |= VM_RESERVED;
+ vsize = vma->vm_end - vma->vm_start;
+ if (vsize != EHCA_PAGESIZE) {
+ ehca_err(qp->ib_qp.device, "invalid vsize=%lx",
+ vma->vm_end - vma->vm_start);
+ return -EINVAL;
+ }
+
+ physical = qp->galpas.user.fw_handle;
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+ vma->vm_flags |= VM_IO | VM_RESERVED;
+
+ ehca_dbg(qp->ib_qp.device, "vsize=%lx physical=%lx",
+ vsize, physical);
+ ret = remap_pfn_range(vma, vma->vm_start,
+ physical >> PAGE_SHIFT, vsize,
+ vma->vm_page_prot);
+ if (ret) {
+ ehca_err(qp->ib_qp.device,
+ "remap_pfn_range() failed ret=%x",
+ ret);
+ return -ENOMEM;
+ }
+ break;
+
+ case 2: /* qp rqueue_addr */
+ ehca_dbg(qp->ib_qp.device, "qp=%p qp rqueue_addr", qp);
+ vma->vm_flags |= VM_RESERVED;
+ vma->vm_ops = &ehcau_vm_ops;
+ break;
+
+ case 3: /* qp squeue_addr */
+ ehca_dbg(qp->ib_qp.device, "qp=%p qp squeue_addr", qp);
+ vma->vm_flags |= VM_RESERVED;
+ vma->vm_ops = &ehcau_vm_ops;
+ break;
+
+ default:
+ ehca_err(qp->ib_qp.device, "bad resource type %x",
+ rsrc_type);
+ return -EINVAL;
}
break;
@@ -323,3 +316,77 @@ int ehca_mmap(struct ib_ucontext *contex
return 0;
}
+
+int ehca_mmap_nopage(u64 foffset, u64 length, void **mapped,
+ struct vm_area_struct **vma)
+{
+ down_write(¤t->mm->mmap_sem);
+ *mapped = (void*)do_mmap(NULL,0, length, PROT_WRITE,
+ MAP_SHARED | MAP_ANONYMOUS,
+ foffset);
+ up_write(¤t->mm->mmap_sem);
+ if (!(*mapped)) {
+ ehca_gen_err("couldn't mmap foffset=%lx length=%lx",
+ foffset, length);
+ return -EINVAL;
+ }
+
+ *vma = find_vma(current->mm, (u64)*mapped);
+ if (!(*vma)) {
+ down_write(¤t->mm->mmap_sem);
+ do_munmap(current->mm, 0, length);
+ up_write(¤t->mm->mmap_sem);
+ ehca_gen_err("couldn't find vma queue=%p", *mapped);
+ return -EINVAL;
+ }
+ (*vma)->vm_flags |= VM_RESERVED;
+ (*vma)->vm_ops = &ehcau_vm_ops;
+
+ return 0;
+}
+
+int ehca_mmap_register(u64 physical, void **mapped,
+ struct vm_area_struct **vma)
+{
+ int ret;
+ unsigned long vsize;
+ /* ehca hw supports only 4k page */
+ ret = ehca_mmap_nopage(0, EHCA_PAGESIZE, mapped, vma);
+ if (ret) {
+ ehca_gen_err("could'nt mmap physical=%lx", physical);
+ return ret;
+ }
+
+ (*vma)->vm_flags |= VM_RESERVED;
+ vsize = (*vma)->vm_end - (*vma)->vm_start;
+ if (vsize != EHCA_PAGESIZE) {
+ ehca_gen_err("invalid vsize=%lx",
+ (*vma)->vm_end - (*vma)->vm_start);
+ return -EINVAL;
+ }
+
+ (*vma)->vm_page_prot = pgprot_noncached((*vma)->vm_page_prot);
+ (*vma)->vm_flags |= VM_IO | VM_RESERVED;
+
+ ret = remap_pfn_range((*vma), (*vma)->vm_start,
+ physical >> PAGE_SHIFT, vsize,
+ (*vma)->vm_page_prot);
+ if (ret) {
+ ehca_gen_err("remap_pfn_range() failed ret=%x", ret);
+ return -ENOMEM;
+ }
+
+ return 0;
+
+}
+
+int ehca_munmap(unsigned long addr, size_t len) {
+ int ret = 0;
+ struct mm_struct *mm = current->mm;
+ if (mm) {
+ down_write(&mm->mmap_sem);
+ ret = do_munmap(mm, addr, len);
+ up_write(&mm->mmap_sem);
+ }
+ return ret;
+}
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